Details of a Researcher - HAYASHI, Yasuhiro

写真a

HAYASHI, Yasuhiro

Affiliation

Faculty of Science and Engineering, School of Advanced Science and Engineering

Job title

Professor

Homepage URL

http://www.hayashilab.sci.waseda.ac.jp/hayashi/

Concurrent Post

Faculty of Science and Engineering Graduate School of Advanced Science and Engineering

Research Institute

2020

-

2022

理工学術院総合研究所兼任研究員
2019

-

2023

先進グリッド技術研究所プロジェクト研究所所長

Education

　

-

1994

Waseda University Graduate School, Division of Science and Engineering
　

-

1992

Waseda University
　

-

1991

Waseda University Graduate School, Division of Science and Engineering
　

-

1989

Waseda University Faculty of Science and Engineering

Degree

早稲田大学博士（工学）

Research Experience

2014.07

-

Now

Advanced Collaborative Research Organization for Smart Society (ACROSS) Dean
2009.12

-

Now

Research Insititute of Advanced Network Technology,Director
2009

-

Now

Waseda University, graduate school of advanced science and engineering, Professor
2007

-

2009

福井大学工学部電気・電子工学科准教授
2000

-

2007

University of Fukui, faculty of engineering, associate professor
1997

-

2000

Ibaraki Unversity, faculty of engineering, lecturer,
1994

-

1997

Ibaraki Unversity, faculty of engineering, research associate
1993

-

1994

Waseda University, faculty of science and engineering, research associate

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Professional Memberships

　

　

　

電気学会
　

　

　

米国電気電子学会

Research Areas

Power engineering

Research Interests

Energy management systems
Optimization of advanced electrical energy system, Cooperative operation and control of distributed generation and power system
分散型電源と電力系統との協調運用・制御
先進電気エネルギーシステムの最適化
Cooperative operation and control of distributed generation and power system
Optimization of advanced electrical energy system

▼display all

Research Seeds

Development of energy control techniques for the realization of a smart grid

Energy

Papers

Determination Method of Volt-var Curve Settings for Smart Inverters to Decrease SVR Tap Operations Caused by PV Output Fluctuations and Minimize Distribution Losses

Yusuke Yamashita, Shinya Yoshizawa, Yasuhiro Kodama, Yasuhiro Hayashi, Naohisa Murashita

IEEJ Transactions on Power and Energy 141 ( 12 ) 2021.12 [Refereed] [Domestic journal]
Evaluation of Business Profitability for Planned Generation of Battery-assisted PV Considering Bidding to Wholesale Market

Ryu Ando, Hideo Ishii, Yasuhiro Hayashi

Energy Informatics 2021.09 [Refereed] [International journal]
Advanced Voltage Control Method for Improving the Voltage Quality of Low-Voltage Distribution Networks with Photovoltaic Penetrations

Marika Nakamura, Shinya Yoshizawa, Hideo Ishii, Yasuhiro Hayashi

Energy Informatics 2021.09 [Refereed] [International journal]
Model Predictive Control with Pattern Learning of Prediction and Control Trajectory and its Application to a Battery EMS Problem

Yutaka Iino, Yasuhiro Hayashi

SICE Annual Conference2021 WeA07.2 2021.09 [Refereed] [International journal]
Deep Reservoir Architecture for Short-Term Residential Load Forecasting: An Online Learning Scheme for Edge Computing

Yu Fujimoto, Megumi Fujita, Yasuhiro Hayashi

Applied Energy 298 ( 117176 ) 1 - 18 2021.09 [Refereed] [International journal]

DOI
Estimation Method of Disconnection Point Using Common Earthing Conductor for Distribution Line Without Branch Line

Yasuhiro Kodama, Yasuhiro Hayashi, Yusuke Nishida

IEEJ Transactions on Power and Energy 141 ( 8 ) 559 - 567 2021.08 [Refereed] [Domestic journal] [International coauthorship]

DOI
Spatial Demand Forecasting Based on Smart Meter Data for Improving Local Energy Self-Sufficiency in Smart Cities

Ayumu Miyasawa, Yu Fujimoto, Yasuhiro Hayashi

IET Smart Cities 2021.06 [Refereed] [International journal]

DOI
Voltage Regulation of Distribution System by Demand Side Battery Control Method Considering Coordination with HEMS

Shogo Fukui, Teru Miyazaki, Yutaka Iino, Wataru Hirohashi, Yasuhiro Hayashi, Naoya Matsumoto, Yu Matsumoto, Shin Inagaki

IEEJ Transactions on Power and Energy 141 ( 5 ) 336 - 344 2021.05

DOI
Forecast of Area Prices in Japanese Day-Ahead Electricity Market using Open Data

Manaka Omura, Yu Fujimoto, Yasuhiro Hayashi, Toshiyuki Sawa, Hiroto Sasaki, Naoto Fukuyama, Yoshitaka Nishino

IEEJ Transactions on Power and Energy 141 ( 5 ) 366 - 373 2021.05

DOI
HEMSとの協調を考慮した需要家蓄電池の配電系統電圧制御手法

福井将悟, 宮崎輝, 飯野穣, 広橋亘, 林泰弘, 松本直也, 松本侑, 稲垣信

論文誌B 141 ( 5 ) 337 - 344 2021.05 [Refereed] [International journal]
蓄電池を活用した再生可能エネルギーを主体とする離島オフグリッドシステムの運用手法及び容量選定手法

長澤和輝, 宮崎輝, 林泰弘, 庄司智昭, 吉永淳

論文誌B 141 ( 6 ) 406 - 414 2021 [Refereed] [International journal]
Dynamic Optimization of SVR Control Parameters for Improving Tap Operation Efficiency of Voltage Control in Distribution Networks

Kohei Murakami, Shinya Yoshizawa, Hideo Ishii, Yasuhiro Hayashi, Hiroshi Kondo, Yuki Kanazawa, Hideo Nomura, Takuya Kajikawa

IEEJ Transactions on Electrical and Electronic Engineering 16 ( 1 ) 67 - 77 2021.01 [Refereed] [International journal]
配電損失最小構成技術の効果的普及に向けた適地選定のための統計的スクリーニング手法

阿美咲良, 宮崎輝, 藤本悠, 林泰弘, 長谷川匡彦, 宮里善貴, 篠崎一樹

論文誌B 141 ( 2 ) 1 - 9 2021 [Refereed] [International journal]
オープンデータに基づく電力スポット市場のエリア価格予測 -複数予測スキームの統合アプローチの検討

大村愛花, 藤本悠, 林泰弘, 澤敏之, 佐々木浩人, 福山直人, 西野由高

論文誌B 電力・エネルギー部門誌 141 ( 5 ) 366 - 373 2021 [Refereed] [International journal]
風力発電の安定利用を目的としたバランシンググループにおける揚水発電機の運転計画決定手法

金子曜久, 稲垣舞子, 藤本悠, 林泰弘, 野中俊介

論文誌B 141 ( 2 ) 79 - 87 2021 [Refereed] [International journal]
Battery smoothing control for photovoltaic system using short-term forecast with total sky images

Anto Ryu, Hideo Ishii, Yasuhiro Hayashi

Electric Power Systems Research 190 ( 106645 ) 2021 [Refereed] [International journal]
Backup generator output control method of off-grid system based on renewable energy in remote island

Kazuki Nagasawa, Yasuhiro Hayashi, Teru Miyazaki, Tomoaki Shoji, Yutaka Iino, Jun Yoshinaga

2020 International Conference on Smart Grids and Energy Systems (SGES) 2020.11

DOI
Charging Schedule Optimization Method for Electric Buses with PV Installed at Bus Stations: Sensitivity Analysis of PV Capacity based on Real City Data

Yuki Tomizawa, Yutaka Iino, Yuto Ihara, Yasuhiro Hayashi, Teru Miyazaki, Ryota Yamamoto

2020 International Conference on Smart Grids and Energy Systems (SGES) 2020.11

DOI
Operational Planning of a Residential Fuel Cell System for Minimizing Expected Operational Costs Based on a Surrogate Model

Yuta Tsuchiya, Yu Fujimoto, Akira Yoshida, Yoshiharu Amano, Yasuhiro Hayashi

IEEE Access 8 173983 - 173998 2020.10 [Refereed] [International journal]
Designing Sustainable Smart Cities: Cooperative Energy Management Systems and Applications

Yu Fujimoto, Hideo Ishii, Yasuhiro Hayashi

IEEJ Transactions on Electrical and Electronic Engineering 15 ( 5 ) 155 - 165 2020.09 [Refereed] [International journal]
太陽光発電大量導入地域における車両電動化のエネルギーチェーンによる経済性・環境性評価

矢部邦明, 林泰弘

エネルギー・資源学会論文誌 41 ( 5 ) 155 - 165 2020.09 [Refereed] [International journal]
Semicentralized Voltage Control Method Using SVR Based on Past Voltage Measurements in Distribution Network

Kohei Murakami, Shinya Yoshizawa, Hideo Ishii, Yasuhiro Hayashi, Hiroshi Kondo, Yuki Kanazawa, Hideo Nomura, Takuya Kajikawa

IEEJ Transactions on Electrical and Electronic Engineering 15 ( 7 ) 1032 - 1039 2020.07 [Refereed] [International journal]
Electric Vehicle Charging Management Using Auction Mechanism for Reducing PV Cur- tailment in Distribution Systems

Hiroshi Kikusato, Yu Fujimoto, Shinichi Hanada, Daiya Isogawa, Shinya Yoshizawa, Hiroshi Ohashi, Yasuhiro Hayashi

IEEE Transactions on Sustainable Energy 11 ( 3 ) 1394 - 1403 2020.07 [Refereed] [International journal]
Sparse Modeling Approach for Identifying the Dominant Factors Affecting Situation Dependent Hourly Electricity Demand

Nanae Kaneko, Yu Fujimoto, Satoshi Kabe, Motonari Hayashida, Yasuhiro Hayashi

Applied Energy 265 114752 2020.05 [Refereed] [International journal]
Operational strategies for self-consumption considering the use of an electric vehicle in a net zero energy house

Mizuho Akimoto, Jungmin Kim, Yugo Tsuneoka, Reina Oki, Shin Ichi Tanabe, Yasuhiro Hayashi, Naomi Morito

Journal of Environmental Engineering (Japan) 85 ( 770 ) 277 - 287 2020.04

　View Summary

© 2020 Architectural Institute of Japan. All rights reserved. This study proposes operational strategies for combinations of equipment, including an electric vehicle (EV), in a house using self-consumption. The aim of this is to attain both comfort and efficient energy management under several household and regional conditions, focusing on the frequency of the EV's use as well as the residents' schedules. As operational strategies for self-consumption of surplus power, storage battery (BT) charging, EV charging and daytime operation of heat pump water heater (EC) were assumed. Moreover, the amount of self-consumption, CO2 emissions, and the cost-effectiveness of different equipment combinations were calculated and compared.

DOI
電気自動車の利用を考慮したゼロ・エネルギー住宅の自家消費運用手法の提案

秋元瑞穂, 金ジョンミン, 常岡優吾, 大木玲奈, 田辺新一, 林泰弘, 森戸直美

日本建築学会環境系論文集 2020年4月第85巻第770号 2020.04 [Refereed]
Multipurpose control and planning method for battery energy storage systems in distribution network with photovoltaic plant

Satoru Akagia, Shinya Yoshizawa, Masakazu Ito, Yu Fujimoto, Teru Miyazaki, Yasuhiro Hayashi, Katsuhisa Tawa, Toshiya Hisada, Takashi Yano

International Journal of Electrical Power and Energy Systems 2020.03 [Refereed]
LDC-Control Parameters by Plane Determination Using Database Offline in Distribution Networks with PV System

Akihisa Kaneko, Yasuhiro Hayashi, Masakazu Ito, Takaya Anegawa, Hideyasu Hokazono, Masayuki Oyama

International Journal of Electrical and Electronic Engineering & Telecommunications(IJEETC) 9 ( 2 ) 2020.03 [Refereed]
Multipurpose control and planning method for battery energy storage systems in distribution network with photovoltaic plant

Satoru Asagi, Shinya Yoshizawa, Masakazu Ito, Yu Fujimoto, Teru Miyazaki, Yasuhiro Hayashi, Katsuhisa Tawa, Toshiya Hisada, Takashi Yano

International Journal of Electrical Power and Energy Systems 1 - 13 2020.03 [Refereed]
Home Energy Management Systems under Effects of Solar-Battery Smart Inverter Functions

Van Tu Dao, Hideo Ishii, Yuji Takenobu, Shinya Yoshizawa, Yasuhiro Hayashi

IEEJ Transactions on Electrical and Electronic Engineering 2020.02 [Refereed]
Partitioning Method for the Large-scale Operation Planning Problem of a District Heating and Cooling System for Electricity Adjustment

Kohei Tomita, Yutaka Iino, Yasuhiro Hayashi, Yuto Yamamoto, Kosuke Kobayashi, Atsuhiko Hayakawa

IEEJ Transactions on Power and Energy 140 ( 2 ) 94 - 103 2020.02 [Refereed]

DOI
Fast hierarchical coordination using price signal for town-scale home-EMSs aggregation with digital annealer

Toranosuke Saito, Shinya Katayama, Akira Yoshida, Takahiro Kashikawa, Koich Kimura, Yoshiharu Amano, Yasuhiro Hayashi

ECOS 2020 - Proceedings of the 33rd International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems 1662 - 1673 2020

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© ECOS 2020.All right reserved. The demand response (DR), which balances power supply and demand, is attracting attention as a method of absorbing fluctuations in renewable energy when output is unstable. Since the Great East Japan Earthquake in 2011, Japan has made progress toward the liberalization of electricity and the introduction of renewable energy. In 2021, a supply and demand adjustment market will be opened. Unlike companies and factories, which can control large amounts of power for long periods, household demand has a small capacity and is short term. However, household demand is expected to be able to respond quickly to emergencies and to secure capacity by consolidating multiple households via an aggregator. This study concerns two problems in assessing town-scale residential DR capability. First, we evaluate residential DR response capacity. This capacity is assumed to be pre-cooling heating by an air conditioner according to thermal insulation and heat capacity characteristics, and energy storage by a hot water storage tank and a power storage device. Next, we investigate implementing the optimization of the town-scale DR by an aggregator. Optimal town-scale aggregation proposals are often formulated in large-scale combinatorial optimization problems. The challenge is that the calculation tends to be time-consuming and difficult to solve. In this research, we propose a framework that can be solved at high speed using digital annealer. Finally, we evaluate the possibility of town-scale residential DR in specific areas of Tokyo.
Environmental efficiency evaluation in high solar wind penetration region with fractional optimization-based operational planning

Akira Yoshida, Kuniaki Yabe, Hideo Ishii, Yoshiharu Amano, Yasuhiro Hayashi

ECOS 2020 - Proceedings of the 33rd International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems 1686 - 1698 2020

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© ECOS 2020.All right reserved. The article develops and demonstrates the fractional optimization to evaluate the environmental efficiency of the regional-scale energy system with heat pumping and thermal storage. The fractional optimization gets converted into the equivalent quadratic one via the proposed iterative algorithm. The proposed method makes converting a fractional equation into a different one with an auxiliary variable, and it makes us free from heuristic parameter tuning that makes balancing the weight of objective coefficient when the objective function is composed of some terms. We consider the operational planning problem of the mixed energy grid, including electricity and heat. It manages power generations and a heat pump with thermal storage as an application. The numerical studies take into account the open data measured by the most western region of Japan, where the region gets applied the installation/connection of variable renewable energy sources of 25.7 GW at the moment even not every capacity starts operation. As a result, the CO2conversion factor reaches 0.21 kg-CO2/kWh in the best case. It is confirmed that a heat pump with thermal storage can absorb the electrical output from variable renewable energy sources up to 2.72 TWh/y.
Pre-cooling operation aiming for demand response adaptation in house

Jungmin Kim, Yugo Tsuneoka, Reina Oki, Shin Ichi Tanabe, Yasuhiro Hayashi, Naomi Morito

Journal of Environmental Engineering (Japan) 85 ( 769 ) 215 - 224 2020

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© 2020 Architectural Institute of Japan. All rights reserved. Renewable energy is the focus of the 5th Strategic Energy Plan in Japan. Electric load management systems such as Demand Response (DR) are necessary to increase renewable energy usage. The focus of this study is pre-cooling operations in the daytime, during summer, to reduce electric load during DR. The aim of this study is to evaluate (1) the effectiveness of electric demand shift by "Pre-cooling", and (2) the effect on comfort and health of the residents who switch to "Pre-cooling".

DOI
Evaluation of an Optimal Radial-Loop Configuration for a Distribution Network With PV Systems to Minimize Power Loss

Akihisa Kaneko, Yasuhiro Hayashi, Takaya Anegawa, Hideyasu Hokazono and Yukiyasu Kuwashita

IEEE Access 8 220408 - 220421 2020 [Refereed] [International journal]
Decentralized BESS Charging and Discharging Control Method for Avoiding Pole Transformer Overcapacity

Okubo Riku, Yoshizawa Shinya, Hayashi Yasuhiro, Kawano Shunsuke, Matsuda Keishi, Itaya Nobuhiko, Takano Tomihiro

IEEJ Transactions on Power and Energy 140 ( 8 ) 638 - 649 2020 [Refereed] [International journal]

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<p>This paper proposes a decentralized charging and discharging control method of a battery energy storage system (BESS) to prevent the over-capacity of a pole transformer (Pole-Tr) in low-voltage (LV) distribution systems due to reverse power flow from the photovoltaic generation (PV) system. A distribution system operator (DSO) provides the charging/discharging parameters determined by using only the LV-distribution system configuration and the PV/BESS capacity to the customers and each BESS automatically controls the charging/discharging power according to the provided parameters. The charging parameter is defined in the relationship between the state-of-charge (SoC) and the charging threshold ε as the SoC-ε curve, and a total of three SoC-ε curves for the different objectives are prepared. In the charging phase, the BESS selects one SoC-ε curve every minute and determines the charging power based on the charging threshold ε and the present SoC. In the discharging phase, the BESS operates in the load-following discharging and SoC control discharging to adjust the SoC for the prevention of the over-capacity of Pole-Tr. The proposed method is tested on several types of LV-distribution systems, and the numerical simulation results demonstrate that the proposed method can prevent the over-capacity of Pole-Tr and maintain the high charging amount of BESSs.</p>

DOI CiNii
Advanced voltage control based on short-time ahead voltage fluctuation estimation in distribution system

S. Yoshizawa, Y. Hayashi

Electr. Power Syst. Res 188 ( 106559 ) 1 - 6 2020 [Refereed] [International journal]
次世代型路面電車交通と配電系統の統合モデルによる電化公共交通都市を目指した電力交通間の相互影響の評価

小鯖裕之, 小林宏泰, 宮崎輝, 飯野穣, 近藤圭一郎, 林泰弘, 山本良太, 長谷川匡彦, 吉永淳

論文誌C 電子・情報・システム部門誌 140 ( 8 ) 892 - 904 2020 [Refereed] [International journal]
送電損失低減を目的としたPV連系送電系統における2電圧階級のVQC装置協調運用決定手法

金子曜久, 芳澤信哉, 林泰弘, 杉村修平, 植田喜延, 田邊隆之

論文誌B 140 ( 6 ) 484 - 494 2020 [Refereed] [International journal]
Intensive quadratic programming approach for home energy management systems with power utility requirements

V.T.Dao, H.Ishii⁎, Y.Takenobu, S.Yoshizawa, Y.Hayashi

International Journal of Electrical Power and Energy Systems 115 2020.01 [Refereed]
CO2削減賦課金と蓄電池導入効果のエネルギーチェーンによる経済性・環境性評価

矢部邦明, 林泰弘

エネルギー・資源学会論文誌 41 ( 1 ) 29 - 37 2020 [Refereed]
系統貢献を目的とした地域冷暖房システムの大規模運転計画問題分割手法

冨田康平, 飯野穣, 林泰弘, 山本有途, 小林広介, 速川敦彦

電気学会電力・エネルギー部門誌 140 ( 2 ) 94 - 103 2020 [Refereed]
Multi-Objective Optimal Operation Planning for Battery Energy Storage in a Grid-Connected Micro-Grid

Anto Ryu, Hideo Ishii, Yasuhiro Hayashi

International Journal of Electrical and Electronic Engineering & Telecommunications, 2020 [Refereed]
Scheduling method of wind power generation for electricity market using state-of-charge transition and forecast error

Aki Kikuchi, Masakazu Ito, Yasuhiro Hayashi

Journal of International Council on Electrical Engineering 9 ( 1 ) 123 - 132 2020.01 [Refereed]
Intensive quadratic programming approach for home energy management systems with power utility requirements

V.T.Dao, H.Ishii⁎, Y.Takenobu, S.Yoshizawa, Y.Hayashi

International Journal of Electrical Power and Energy Systems 2020.01 [Refereed]
Hot Water Demand Prediction Method for Operational Planning of Residential Fuel Cell System

Yuta Tsuchiya, Yasuhiro Hayashi, Yu Fujimoto, Akira Yoshida, Yoshiharu Amano

7th International Conference on Smart Grid, icSmartGrid 2019 46 - 51 2019.12

　View Summary

© 2019 IEEE. This study proposes a hot water demand prediction method for operational planning of polymer electrolyte fuel cell cogeneration systems (PEFC-CGSs). PEFC-CGSs provide hot water by utilizing waste heat produced in the electricity generation process. An optimal operational plan according to household demand leads to further energy saving. Therefore, operational planning methods based on household demand prediction have received intense focus. In particular, the prediction of the amount of hot water demand is important for efficient operation. The authors have attempted to improve the hot water prediction method based on multivariate random forest (MRF), which uses the average of many decision trees' outputs as the prediction result. However, some experimental results show that a prediction strategy based on averaging the outputs of decision trees does not always lead to the best solution. In this study, the authors propose a novel prediction method utilizing the quantile of the estimation results derived in MRF. By setting the appropriate quantile, we can evade the demand underestimation, which has a higher negative impact on operational efficiency than overestimation. The usefulness of the proposed approach is evaluated via numerical simulations using real-world demand data.

DOI
Analysis of operation plans of residential PEFC–CGS: a perspective of cost optimality under demand uncertainty

Yuta Tsuchiya, Yu Fujimoto, Akira Yoshida, Yoshiharu Amano, Yasuhiro Hayashi

Journal of International Council on Electrical Engineering (JICEE), 9 ( 1 ) 105 - 112 2019.12 [Refereed]
Spinning reserve quantification considering confidence levels of forecast in systems with high wind and solar power penetration

Thi Nguyet, Hanh Nguyen, Kuniaki Yabe, Masakazu Ito, Van Tu Dao, Hideo Ishii, Yasuhiro Hayashi

IEEJ Transactions on Electrical and Electronic Engineering ,Volume 14, Issue 9, 2019, 14 ( 9 ) 1304 - 1313 2019.09 [Refereed]
Spinning reserve quantification considering confidence levels of forecast in systems with high wind and solar power penetration

Thi Nguyet, Hanh Nguyen, Kuniaki Yabe, Masakazu Ito, Van Tu Dao, Hideo Ishii, Yasuhiro Hayashi

IEEJ Transactions on Electrical and Electronic Engineering ,Volume 14, Issue 9, 2019, 14 ( 9 ) 2019.09 [Refereed]
Willingness to Pay for Home Energy Management Systems A Survey in New York and Tokyo

Ayu Washizu, Satoshi Nakano, Hideo Ishii, Yasuhiro Hayashi

Sustainability (Switzerland)11,Published - 2019 9 1 11 2019.09 [Refereed]
Renovating a house to aim for net-zero energy, thermal comfort, energy self-consumption and behavioral adaptation A method proposed for ENEMANE HOUSE 2017

Reina Oki, Yugo Tsuneoka, Shingo Yamaguchi, Soma Sugano, Naoya Watanabe, Takashi Akimoto, Yasuhiro Hayashi, Shinji Wakao, Shin-ichi Tanabe

『Energy and Buildings』pubulished by ELSEVIER, 201 183 - 193 2019.09 [Refereed]

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© 2019 In Japan, low thermal insulation performance in existing houses is a considerable issue that may lead to health problems. Therefore, it is necessary to acquire technologies and knowledge regarding thermal insulation renovation. On the other hand, with the spread of photovoltaic panels, urban scale energy management and self-consumption have become important. The purpose of this study is to introduce a net-zero energy house which was designed, built, and analyzed by the team of Waseda University and Shibaura Institute of Technology in the ENEMANE HOUSE 2017 competition. The team proposed a renovation method which insert highly insulated walls into the existing structure, creating not only highly insulated areas but also non-insulated areas called “loggias.” By opening and closing the windows of the loggia according to the season, it functions as a passive system and enables residents’ behavioural adaptation to the environment. On the other hand, to aim for self-consumption and leveling of reverse power flow, a heat pump water heater and a storage battery were operated according to solar radiation prediction. Actual measurements confirmed the implementation and effect of this operational method. Moreover, the energy consumption was greatly reduced, while thermal comfort was maintained by thermal insulation and efficient equipment introduction.

DOI
Willingness to Pay for Home Energy Management Systems A Survey in New York and Tokyo

Ayu Washizu, Satoshi Nakano, Hideo Ishii, Yasuhiro Hayashi

Sustainability (Switzerland) 11 4790 2019.09 [Refereed]
Enhancing Security for Voltage Control of Distribution Systems under Data Falsification Attacks

Mizuki Onogawa, Shinya Yoshizawa, Yu Fujimoto, Hideaki Ishii, Isao Ono, Takashi Onoda, Yasuhiro Hayashi

American Control Conference (ACC) 2019.08 [Refereed]
Estimation of expected cost curve on operation parameter space for planning residential PEFC-CGS

Yuta Tsuchiya, Yasuhiro Hayashi, Yu Fujimoto, Akira Yoshida, Yoshiharu Amano

2019 IEEE Milan PowerTech, PowerTech 2019 2019.06

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© 2019 IEEE. This study proposes an operation planning method for polymer electrolyte fuel cell cogeneration systems (PEFC-CGSs). PEFC-CGSs provide hot water by utilizing waste heat produced in the electricity generation process. An appropriate operation plan according to household demand will lead to further energy saving. The authors have discussed a framework for estimating expected operation costs of individual operation plans to select an appropriate candidate that minimizes the cost. In this scheme, the expected cost under each corresponding operation was independently estimated. This approach can be expected to provide accurate prediction of costs under individual operations. However, one open issue remains; it may not work well in estimating relative goodness compared to other operations. In this study, the authors propose a new cost estimation approach, focusing on relative appropriateness in candidate plans based on a multiple output prediction. The usefulness of the proposed approach is proved via a numerical simulation.

DOI
Toward Data-Driven Identification of Essential Factors Causing Seasonal Change in Daily Electricity Demand Curves

Nanae Kaneko, Yu Fujimoto, Yasuhiro Hayashi

2019 IEEE Milan PowerTech,18938863 2019.06 [Refereed]
所要蓄電池容量の最適設計のためのベータ分布に基づく風力発電予想誤差時系列モデル

兌瀟偉, 伊藤雅一, 藤本悠, 林泰弘, 朱桂萍, 姚義忠

電気学会論文誌B, 139巻, 3号 139 ( 3 ) 2019.03 [Refereed]
Machine Learning Approach for Graphical Model-Based Analysis of Energy-Aware Growth Control in Plant Factories

Yu Fujimoto, Saya Murakami, Nanae Kaneko, Hideki Fuchikami, Toshirou Hattori, Yasuhiro Hayashi

IEEE Access Vol,7、Article number 8663284 7 2019.03 [Refereed]
既存工業化住宅を用いた改修型ゼロ･エネルギーハウスの提案

中川純, 常岡優吾, 山口真吾, 大木玲奈, 菅野颯馬, 野元彬久, 丸山由香, 荒木菜那, 山品太輝, 池原靖史, 渡辺靖哉, 小林達宏, 田辺新一, 秋元孝之, 林泰弘, 若尾真治

日本建築学会技術報告集、第25巻、第59号 25 ( 59 ) 2019.02 [Refereed]
An online HEMS scheduling method based on deep recurrent neural network

Akira Yoshida, Yu Fujimoto, Yoshiharu Amano, Yasuhiro Hayashi

ECOS 2019 - Proceedings of the 32nd International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems 1327 - 1335 2019

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© ECOS 2019 - Proceedings of the 32nd International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems. All rights reserved. For a daily-basis scheduling of an energy system, energy management system often enough to use not a global optimal scheduling but a near optimal scheduling. The article proposes an online scheduling framework without online optimization. The framework is built from two encoder-decoder architectures to extract features of time series; a multi-layer long short-term memory regression model for multi-step time-series forecasting, and multi-class and single-label classification model for on/off scheduling of a device. The models are estimated at offline, and return scheduling from historical time series as input, at online. We evaluate the accuracy of scheduling from the viewpoint of Kullback-Leibler divergence which measures the dissimilarity between two probability distributions. Through the numerical experiments, we demonstrate the usefulness of the proposed framework.
Machine Learning Approach for Graphical Model-Based Analysis of Energy-Aware Growth Control in Plant Factories

Yu Fujimoto, Saya Murakami, Nanae Kaneko, Hideki Fuchikami, Toshirou Hattori, Yasuhiro Hayashi

IEEE Access 7 ( 1 ) 32183 - 32196 2019 [Refereed]
所要蓄電池容量の最適設計のためのベータ分布に基づく風力発電予測誤差時系列モデル

兌瀟偉, 伊藤雅一, 藤本悠, 林泰弘, 朱桂萍, 姚良忠

電気学会論文誌B 電力・エネルギー部門誌 139 ( 3 ) 212 - 224 2019 [Refereed]
Intensive Quadratic Programming Approach for Home Energy Management Systems with Power Utility Requirements

Van Tu Dao, Hideo Ishii, Yasuhiro Hayashi

Int. J. Electrical Power and Energy Systems 2019 [Refereed]
Double-layer optimization of home energy management systems with volt–watt functions

Van Tu Dao, Hideo Ishii, Yasuhiro Hayashi

IEEJ Transactions on Electrical and Electronic Engineering 14 ( 5 ) 1 - 11 2019.01 [Refereed]
Energy disaggregation based on smart metering data via semi-binary nonnegative matrix factorization

Ayumu Miyasawa, Yu Fujimoto, Yasuhiro Hayashi

Energy and Buildings 183 ( 15 ) 547 - 558 2019 [Refereed]
Alerting to Rare Large-Scale Ramp Events in Wind Power Generation

Yu Fujimoto, Yuka Takahashi, Yasuhiro Hayashi

IEEE Transactions on Sustainable Energy 10 ( 1 ) 55 - 65 2019 [Refereed]
Optimal Parameters of Volt-Var Functions for Photovoltaic Smart Inverters in Distribution Networks

Van Tu Dao, Hideo Ishii, Yasuhiro Hayashi

IEEJ Transactions on Electrical and Electronic Engineering 14 ( 1 ) 75 - 84 2019 [Refereed]
Scalable enumeration approach for maximizing hosting capacity of distributed generation

Yuji Takenobu, Norihito Yasudab, Shin-ichi Minatoc, Yasuhiro Hayashi

Electrical Power and Energy Systems 105 867 - 876 2019 [Refereed]
住宅における予冷予熱運転による太陽光発電電力の有効利用に関する実証研究

金ジョンミン, 徐天舒, 常岡優吾, 田辺新一, 林泰弘, 森戸直美

日本建築学会環境系論文集 2019年 755 2019 [Refereed]
蓄電池を再生可能エネルギー併用する場合の環境性と経済性のエネルギーチェーンを考慮した評価

矢部邦明, 林泰弘

エネルギー・資源学会論文誌， 40 ( 3 ) 69 - 77 2019 [Refereed]
蓄電池による太陽光発電出力の自家消費増加の経済性評価

矢部邦明, 林泰弘

電気学会論文誌B 電力・エネルギー部門誌 139 ( 5 ) 363 - 371 2019 [Refereed]
Bid Determination Method for an Electricity Market with State-of-Charge Maintenance of a Compressed Air Energy Storage System Using the Prediction Interval of Wind Power Output

Aki Kikuchi, Masakazu Ito, Yasuhiro Hayashi

Atlantis Highlights in Engineering, Vol. 4 4 176 - 182 2019 [Refereed]
既存工業化住宅を用いた改修型ゼロ･エネルギーハウスの提案

中川純, 常岡優吾, 山口真吾, 大木玲奈, 菅野颯馬, 野元彬久, 丸山由香, 荒木菜那, 山品太輝, 池原靖史, 渡辺靖哉, 小林達宏, 田辺新一, 秋元孝之, 林泰弘, 若尾真治

日本建築学会環境系論文集 2019年 755 73 - 81 2019 [Refereed]
Double-layer optimization of home energy management systems with volt–watt functions

Van Tu Dao, Hideo Ishii, Yasuhiro Hayashi

IEEJ Transactions on Electrical and Electronic Engineering 2019.01 [Refereed]
Alerting to Rare Large-Scale Ramp Events in Wind Power Generation

Yu Fujimoto, Yuka Takahashi, Yasuhiro Hayashi

IEEE Transactions on Sustainable Energy , Volume 10, Issue 1 10 ( 1 ) 2019.01 [Refereed]
住宅における予冷予熱運転による太陽光発電電力の有効利用に関する実証研究

金ジョンミン, 徐天舒, 常岡優吾, 田辺新一, 林泰弘, 森戸直美

日本建築学会環境系論文集 2019年755巻 755 2019.01 [Refereed]
Energy Disaggregation Based on Smart Metering Data via Semi-Binary Nonnegative Matrix Factorization

Ayumu Miyasawa, Yu Fujimoto, Yasuhiro Hayashi

Energy and Buildings, Vol.183 183 2019.01 [Refereed]
Temporal Interpolation of Gridded Solar Radiation Data for Evaluation of PV Fluctuations

Daigo Hirooka, Noboru Murata, Yu Fujimoto, Yasuhiro Hayashi

Energy Procedia, Volume 155 155 2018.11 [Refereed]
Expected Wind Speed Estimation Considering Spatio-Temporal Anisotropy for Generating Synthetic Wind Power Profiles

Kouki Hama, Yu Fujimoto, Yasuhiro Hayashi

Energy Procedia, Volume 155 155 2018.11 [Refereed]
Feature extraction of NWP data for wind power forecasting using 3D-convolutional neural networks

Kazutoshi Higashiyama, Yu Fujimoto, Yasuhiro Hayashi

Energy Procedia, Volume 155 155 2018.11 [Refereed]
Proposal and Evaluation of determination method for multiobjective output dispatch of frequency control generators to compensate for renewable energy system fluctuation in multiarea system operation

Akihisa Kaneko, Yasuhiro Hayashi, Shunsuke Nonaka

Electric Engineering in Japan, Vol.205, Issue 1 205 ( 1 ) 2018.10 [Refereed]
PCSによるPV出力抑制待機の定量的評価と評価結果に基づく出力抑制待機時間の決定

芳澤信哉, 成瀬裕矢, 吉永淳, 林泰弘, 緒方司郎

電気学会論文誌B, 138巻10号 138 ( 10 ) 2018.10 [Refereed]
Upgrading Voltage Control Method Based onPhotovoltaic Penetration Rate

Satoru Akagi, Ryo Takahashi, Akihisa Kaneko, Masakazu Ito, Jun Yoshinaga, Yasuhiro Hayashi, Hiroshi Asano, Hiromi Konda

IEEE TRANSACTIONS ON SMART GRID, VOL. 9, NO. 5 9 ( 5 ) 2018.09 [Refereed]
Operation planning method for home air-conditioners considering characteristics of installation environment

Ryoichi Kuroha, Yu Fujimoto, Wataru Hirohashi, Yoshiharu Amano, Shi-ichi Tanabe, Yasuhiro Hayashi

Energy & Buildings, Vol. 177 177 2018.09 [Refereed]
Electricity Adjustment by Aggregation Control of Multiple District Heating and Cooling Systems

Kohei Tomita, Masakazu Ito, Yasuhiro Hayashi, Takahiro Yagi, Tatsuya Tsukada

Energy Procedia, Volume 149 149 2018.09 [Refereed]
Optimal Parameters of Volt-Var Functions for Photovoltaic Smart Inverters in Distribution Networks

Van Tu Dao, Hideo Ishii, Yasuhiro Hayashi

IEEJ TRANSACTIONS ON ELECTRICAL AND ELECTRONIC ENGINEERING 2018.07 [Refereed]
Energy cost minimization in plant factories considering weather factors using additive Bayesian networks

Saya Murakami, Yu Fujimoto, Yasuhiro Hayashi, Hideki Fuchikami, Toshirou Hattori

Journal of International Council on Electrical Engineering, 2018, Vol.8, No.1 8 ( 1 ) 2018.07 [Refereed]
Evaluation of Annual Energy Loss Reduction Based on Reconfiguration Scheduling

Yuji Takenobu, Norihito Yasuda, Shunsuke Kawano, Yasuhiro Hayashi, Shin-ichi Minato

IEEE Transactions on Smart Grid, Vol. 9, Issue 3 9 ( 3 ) 2018.05 [Refereed]
広域系統運用におけるRES出力変動を補償する調整用発電機の出力分担値多目的決定手法の提案と評価

金子曜久, 林泰弘, 野中俊介

電気学会論文誌B, 138巻4号 138 ( 4 ) 2018.04 [Refereed]
Versatile Modeling Platform for Cooperative Energy Management Systems in Smart Cities

Yasuhiro Hayashi, Yu Fujimoto, Hideo Ishii, Yuji Takenobu, Hiroshi Kikusato, Shinya Yoshizawa, Yoshiharu Amano, Shin-Ichi Tanabe, Yohei Yamaguchi, Yoshiyuki Shimoda, Jun Yoshinaga, Masato Watanabe, Shunsuke Sasaki, Takeshi Koike, Hans-Arno Jacobsen, Kevin Tomsovic

Proceedings of the IEEE, Vol.106, No.4 106 ( 4 ) 2018.04 [Refereed]
Electric Vehicle Charge-Discharge Management for Utilization of Photovoltaic by Coordination between Home and Grid Energy Management Systems

Hiroshi Kikusato, Kohei Mori, Shinya Yoshizawa, Yu Fujimoto, Hiroshi Asano, Yasuhiro Hayashi, Akihiko Kawashima, Shinkichi Inagaki, Tatsuya Suzuki

IEEE Transactions on Smart Grid 2018.03 [Refereed]
Method for determining voltage control parameters of low-voltage regulator using forecast interval of photovoltaic output

Masaya Kobayashi, Hiroshi Kikusato, Jun Yoshinaga, Yu Fujimoto, Nao Kumekawa, Shinji Wakao, Yasuhiro Hayashi, Noriyuki Motegi, Yusuke Yamashita

2017 IEEE PES Innovative Smart Grid Technologies Conference Europe, ISGT-Europe 2017 - Proceedings 2018-January 1 - 6 2018.01

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© 2017 IEEE. A low-voltage regulator (LVR) is investigated as a countermeasure for voltage violation caused by the integration of photovoltaic (PV) systems in distribution systems. To achieve appropriate voltage control by the LVR, the appropriate control parameters need to be determined. We have proposed schemes to determine the appropriate control parameters using PV forecast profiles. In a previous work, the control parameters were determined on the basis of one-scenario PV forecast, which derives one forecast value in each time step. However, voltage violation could not be avoided by this method in a time step with a large forecast error. In this paper, we propose a method for determining the voltage control parameters of the LVR based on the forecast interval of the PV outputs to quantitatively consider the PV forecast error. The numerical simulation results show that the proposed method can reduce the amount of voltage deviation compared with the conventional method.

DOI
Evaluation of Voltage Regulation Functions of Smart Inverters Based on Penetration Level and Curtailment in Photovoltaic Systems

Yuta Takasawa, Satoru Akagi, Shinya Yoshizawa, Hideo Ishii, Yasuhiro Hayashi

2018 IEEE PES INNOVATIVE SMART GRID TECHNOLOGIES CONFERENCE EUROPE (ISGT-EUROPE) 2018

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In this study, we evaluate the Volt-VAR and Volt-VAR-Watt functions of smart inverters based on the PV penetration level (PVPL) and the photovoltaic (PV) curtailment. The Volt-VAR and Volt-VAR-Watt functions are compared with the optimal control parameters that maintain the distributed network voltage within an admissible range and minimize PV curtailment. The study results at each PVPL (0-100%) with a typical distribution network model highlight the following points within our conditions. (1) Optimal control parameters vary with the PVPL and two weather conditions; (2) The maximum PVPL does not reach 100% with the Volt-VAR function, whereas the Volt-VAR-Watt function enables the maximum PVPL to reach 100%; and (3) the Volt-VAR-Watt function curtails PV generation, and the average ratio of PV curtailment on cloudy and sunny days is about 12.1% and 0.16%, respectively.
Asynchronous ADMM HEMS aggregation scheme in smart grid

Akira Yoshida, Yu Fujimoto, Yoshiharu Amano, Yasuhiro Hayashi

ECOS 2018 - Proceedings of the 31st International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems 2018

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© 2018 University of Minho. All rights reserved. There is a high demand that aggregating Home Energy Management System (HEMS) as demand response service. Aggregation scheme is divided into the centralized and decentralized approach. On the one hand, in a centralized fashion, a controller manages all device. On the other hand, in a decentralized fashion, a local controller manages own devices and exchanges information for achieving the global optimum. Our previous work has proposed decentralized HEMS aggregation with Alternating Direction Method of Multipliers (ADMM) to address scalability and privacy issue. The main idea of this method is that we decompose the large-scale aggregated scheduling problem into individual HEMS scheduling problem by introducing local upper limit which stands for the maximum purchasable electricity from an electrical grid. This article reports that we extend the previous decentralized HEM method to asynchronous fashion in order to improve convergence time efficiency from the practical implementation perspective. We propose the waiting ratio which represents the minimum HEMS number for updating the next local upper limit. We also evaluate the algorithm processing time with changing waiting ratio and the number of households. As a result, it is confirmed that though the result shows 53% of acceleration at the most accompanied by barely 2% increase cost, the asynchronous process does not always accelerate the processing time. It may be reasonable to suppose that the degree of acceleration is decreased, as the degree of asynchrony increases, because iteration number until fulfilling converging criteria is increased.
Stochastic receding horizon control minimizing mean-variance with demand forecasting for home EMSs

Akira Yoshida, Jun Yoshikawa, Yu Fujimoto, Yoshiharu Amano, Yasuhiro Hayashi

Energy and Buildings, Vol.158, 1 158 ( 1 ) 2018.01 [Refereed]
An evaluation of economical capacity of storage battery equipped with residential PV system and reverse power flow pattern

Yabe, Kuniaki, Hayashi, Yasuhiro

IEEJ Transactions on Power and Energy 138 ( 2 ) 175 - 182 2018.01

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© 2018 The Institute of Electrical Engineers of Japan. This paper presents an evaluation of economical capacity of storage batteries equipped with residential PV systems. In around 2019, many of power companies' ten-year contracts with PV system owners will come to expire, pushing down the selling price of PV generated energy. This, if combined with a declining battery price, would make it more economical to self-consume PV generated energy than selling the electricity to the utilities. The authors explore the optimized storage battery capacity and charge-discharge pattern by using load and PV output data of 200 houses, and by linear programming. Results show 5.8 kWh battery is suitable for an average house with 4.5 kW PV system when the battery system price is about Y60,000/kWh. The authors analyze the daily storage start timing's impact on reverse power which affects power system operation, the optimum combination of PV and battery capacity, and each house's deciding factors for optimum storage capacity and so on.

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Distributed energy management for comprehensive utilization of residential photovoltaic outputs

Fujimoto, Yu, Kikusato, Hiroshi, Yoshizawa, Shinya, Kawano, Shunsuke, Yoshida, Akira, Wakao, Shinji, Murata, Noboru, Amano, Yoshiharu, Tanabe, Shin Ichi, Hayashi, Yasuhiro

IEEE Transactions on Smart Grid 9 ( 2 ) 1216 - 1227 2018.01

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© 2016 IEEE. The introduction of photovoltaic power systems is being significantly promoted. This paper proposes the implementation of a distributed energy management framework linking demand-side management systems and supply-side management system under the given time-of-use pricing program for efficient utilization of photovoltaic power outputs; each system implements a consistent management flow composed of forecasting, operation planning, and control steps. In our framework, demand-side systems distributed in the electric distribution network manage individual energy consumption to reduce the residential operating cost by utilizing the residential photovoltaic power system and controllable energy appliances so as not to inconvenience residents. On the other hand, the supply-side system utilizes photovoltaic power maximally while maintaining the quality of electric power. The effectiveness of the proposed framework is evaluated on the basis of an actual Japanese distribution network simulation model from both the supply-side and demand-side viewpoints.

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Proposal and Empirical Evaluation of Renovation to Zero Energy House (ZEH) Aiming for Self-Consumption of Surplus Power

Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan 2018 ( 0 ) 189 - 192 2018 [Refereed]

DOI CiNii
Prevention of Output Suppression through Heat Pump Water Heaters for High-Penetration Residential PV Systems for Long-Term Operation

Yusuke Miyamoto, Yasuhiro Hayashi

IEEJ Transactions on Power and Energy, 135 (7) 135 ( 7 ) 423 - 436 2017.11 [Refereed]

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There is a danger of output suppression of high-penetration residential PV systems due to voltage increase. It is necessary to install new technology to prevent the occurrence of such phenomenon. Therefore, we focused our attention on heat pump water heaters (HPWHs). HPWHs are usually used to heat water during night time because electricity prices are cheaper than during the daytime for the load leveling in Japan. So they can be used as a countermeasure without additional cost if they are operated during the daytime. However, HPWHs do not have sufficient capacity to absorb inverse energy at each residence. Thus HPWH operation must be optimized to minimize output suppression loss. In this research, we selected four typical sunny days in spring, summer, autumn and winter. The optimal HPWH operation was calculated by numerical simulation. The optimal monthly HPWH operation was investigated using the weather forecast assuming actual operation in each season.
Prevention of Output Suppression through Heat Pump Water Heaters for High-Penetration Residential PV Systems for Long-Term Operation

Yusuke Miyamoto, Yasuhiro Hayashi

IEEJ Transactions on Power and Energy, 135 (7) 135 ( 7 ) 2017.11 [Refereed]
Voltage and energy loss assessment for systems with smart inverter functions of rooftop solar

Dao, Van Tu, Ishii, Hideo, Hayashi, Yasuhiro

ECTI-CON 2017 - 2017 14th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology 159 - 162 2017.11

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© 2017 IEEE. In order to coordinate controlling devices of utilities in medium-voltage networks with large-scale photovoltaic (PV) inverters, a revelation of clustered impacts of rooftop solar panels in PV dominated low-voltage networks is necessary. This paper first investigates impacts of smart functions on system performance if they are installed in rooftop solar inverters. An optimization is then formulated based on conflicts that have been revealed. Through simulations in a typical Japan low-voltage system with real data, investigation and optimization results show that optimal inverter settings for rooftop solar are feasible and they could help improve system performance.

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Electricity adjustment for capacity market auction by a district heating and cooling system

Ito, Masakazu, Takano, Akihisa, Shinji, Takao, Yagi, Takahiro, Hayashi, Yasuhiro, Hayashi, Yasuhiro

Applied Energy 206 623 - 633 2017.11

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© 2017 The Authors Power grids connected to renewable energy sources must cope with fluctuating output by those sources. One method to do so is for the power grid company to accept bids to increase grid stability. These bids are accepted via capacity market auction of increasing grid stability. These offers are to increase the maximum power capacity by using power stations (both utility and non-utility stations) and by reducing electricity consumption via demand response. One candidate for achieving this is a district heating and cooling (DHC) system installed with combined heat and power. However, the electricity adjustment (EA) operation needed by the DHC for the auction is complicated because the system consists of boilers, water heaters, chillers, generators, and other items. To investigate the possibility of using DHC systems for capacity market auctions, this paper proposes two models for operating a DHC system: electricity-adjustment capacity (EAC) provision and EA operation. In addition, to develop methods for evaluating the cost of the proposed operational methods, a model DHC system is formulated with an actual DHC system as a basis. Using the models, numerical simulations are conducted by particle swarm optimization. Then, the running costs of EAC, EA, and normal operation are calculated. The results show that the running costs of the proposed operations are relatively stable by day and season, not varying beyond the range of ±10%. Nevertheless, the running costs in spring and fall are be lower than those in summer and winter. The cost of providing EAC is no more than 1% the cost of normal operation, and the cost of EA itself is no more than 2% that of normal operation.

DOI
Prevention of Output Suppression through Heat Pump Water Heaters for High-Penetration Residential PV Systems for Long-Term Operation

Miyamoto, Yusuke, Hayashi, Yasuhiro

Electrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi) 201 ( 2 ) 32 - 48 2017.11

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© 2017 Wiley Periodicals, Inc. There is a danger of output suppression of high-penetration residential photovoltaic systems due to voltage increase. It is necessa1ry to install new technology to prevent the occurrence of such phenomenon. Therefore, we focused our attention on heat-pump water heaters (HPWHs). HPWHs are usually used to heat water during nighttime because electricity prices are cheaper than during the daytime for the load leveling in Japan. So they can be used as a countermeasure without additional cost if they are operated during the daytime. However, HPWHs do not have sufficient capacity to absorb inverse energy at each residence. Thus, HPWH operation must be optimized to minimize output suppression loss. In this research, we selected four typical sunny days in spring, summer, autumn, and winter. The optimal HPWH operation was calculated by numerical simulation. The optimal monthly HPWH operation was investigated using the weather forecast assuming actual operation in each season.

DOI
Development of prediction-based operation planning method for domestic air-conditioner with adaptive learning of installation environment

Ryoichi Kuroha, Yu Fujimoto, Wataru Hirohashi, Yoshiharu Amano, Shin Ichi Tanabe, Yasuhiro Hayashi

2017 IEEE Power and Energy Society Innovative Smart Grid Technologies Conference, ISGT 2017 2017.10

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© 2017 IEEE. The world is more aware of the need for saving energy because of increasing world energy consumption and environmental problems. To promote saving energy in the domestic field, the use of home energy management systems (HEMSs) is rapidly spreading. The HEMS which has automatically controlling function can control domestic electrical appliances including air-conditioners (ACs). In this research, we focus on AC operation plans to improve thermal comfort and reduce electricity costs for residents. However, AC control planning is generally a difficult task because the operation results greatly depend on the environmental characteristics in which the HEMS is installed. To solve this problem, we proposed an AC planning method that accounts for environmental characteristics and uncertainty in prediction by using historical data.

DOI
Forecast of Infrequent Wind Power Ramps Based on Data Sampling Strategy

Yuka Takahashi, Yu Fujimoto, Yasuhiro Hayashi

Energy Procedia, Vol.135 135 2017.10 [Refereed]
Optimal allocation of photovoltaic systems and energy storage systems considering constraints of both transmission and distribution systems

Konishi, Ryusuke, Konishi, Ryusuke, Takenobu, Yuji, Takenobu, Yuji, Takahashi, Masaki, Takahashi, Masaki, Hayashi, Yasuhiro, Hayashi, Yasuhiro

2017 IEEE Power and Energy Society Innovative Smart Grid Technologies Conference, ISGT 2017 2017.10

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© 2017 IEEE. As more photovoltaic systems (PVs) are allocated to both transmission and distribution systems, it has been required to consider constraints of both transmission and distribution systems, such as power shortages and surpluses in transmission systems and voltages and current in distribution systems. This research proposes the framework to consider these constraints, and formulates the optimal allocation of PVs and energy storage systems (ESSs) to prevent the violation of the above constraints.

DOI
Optimal coordination of voltage controllable devices in distribution systems using power-based models and quadratic programming

Van Dao, Tu, Chaitusaney, Surachai, Hayashi, Yasuhiro, Ishii, Hideo

IEEJ Transactions on Electrical and Electronic Engineering 12 S54 - S64 2017.06

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© 2017 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc. The incorporation of photovoltaic (PV) inverters makes the management of voltage difficult for power system operators. One solution is to consider these inverter-based devices as controllable reactive power (VAr) sources and to coordinate them with other voltage regulating devices in the distribution system. This paper proposes some acceptable approximations to quickly formulate and solve a mixed-integer quadratic programming problem to periodically determine the optimal voltage coordination of a load tap changer, voltage regulators, capacitor banks, and PVs on a smart grid platform. The solution to the optimization problem is aided by an iteration-based algorithm. By using the MATLAB software to carry out the simulation and computation, the method is well verified by comparing its generated result with a trustworthy solution obtained from examining all possible coordinating combinations of voltage regulating devices and PVs in a modified IEEE 34-bus system. The effectiveness and features of the method are clearly illustrated on that test system by considering a time-varying load and PV generation. The obtained results demonstrate the practical application of this work to medium-voltage systems. © 2017 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

DOI
Voltage Control Method Utilizing Solar Radiation Data in High Spatial Resolution for Service Restoration in Distribution Networks with PV

Kawano, Shunsuke, Fujimoto, Yu, Wakao, Shinji, Hayashi, Yasuhiro, Takenaka, Hideaki, Irie, Hitoshi, Nakajima, Takashi Y

Journal of Energy Engineering 143 ( 3 ) 2017.06

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© 2016 American Society of Civil Engineers. This paper proposes a voltage control method during service restoration in the distribution networks with photovoltaic (PV) generator systems. In the current distribution automation system (DAS) process in Japan, voltage dips and surges occur during service restoration because PVs are disconnected simultaneously after a fault and subsequently reconnected after service restoration. However, in the current DAS, voltage regulators such as an on-load tap changer (OLTC) and step voltage regulators (SVRs) are not controlled during service restoration. The proposed DAS estimates the voltage in a distribution network during service restoration, and it controls the tap position of OLTC and/or SVRs according to the predicted voltage. The numerical simulation results using a real-world distribution system model on a real map and PV output profiles derived by actual square kilometer solar radiation data will be shown. Those results indicate that the proposed DAS prevents voltage deviation that occurs as long as the current DAS is used. The results also show high spatial resolution PV output data are needed to prevent voltage deviation absolutely.

DOI
Control methods for an energy storage system when wind power output deviates from grid code

Masakazu Ito, Yu Fujimoto, Masataka Mitsuoka, Hideo Ishii, Yasuhiro Hayashi

JOURNAL OF INTERNATIONAL COUNCIL ON ELECTRICAL ENGINEERING 7 ( 1 ) 159 - 165 2017.06 [Refereed]

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Because of the rapid growth of wind power, an electric grid company set the maximum change rate in a time window to share its fluctuation; this set maximum change rate in a time window is called the grid code. Large fluctuations of wind power may cause deviation from the grid code, but no studies discuss how to control an energy storage system (ESS) so that it quickly goes back to satisfying the grid code. The authors proposed three control methods for an ESS when the wind power output deviates; they are (1) ‘restart’, (2) ‘continuance without operation’, and (3) ‘continuance with operation’. One year numerical simulations with two types of grid codes and two wind power output data have been performed to evaluate the methods. From the studies, control method (3) is found to be the best control method for an ESS to minimize capacity when the wind power output deviates from the grid code, and is verified by the numerical simulations. These results help to answer questions on how to reduce deviation time and ESS capacity using the control method when the wind power output deviates from the grid code.

DOI
Optimal coordination of voltage controllable devices in distribution systems using power-based models and quadratic programming

Van Dao, Tu, Chaitusaney, Surachai, Hayashi, Yasuhiro, Ishii, Hideo

IEEJ Transactions on Electrical and Electronic Engineering 12 S54 - S64 2017.06

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© 2017 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc. The incorporation of photovoltaic (PV) inverters makes the management of voltage difficult for power system operators. One solution is to consider these inverter-based devices as controllable reactive power (VAr) sources and to coordinate them with other voltage regulating devices in the distribution system. This paper proposes some acceptable approximations to quickly formulate and solve a mixed-integer quadratic programming problem to periodically determine the optimal voltage coordination of a load tap changer, voltage regulators, capacitor banks, and PVs on a smart grid platform. The solution to the optimization problem is aided by an iteration-based algorithm. By using the MATLAB software to carry out the simulation and computation, the method is well verified by comparing its generated result with a trustworthy solution obtained from examining all possible coordinating combinations of voltage regulating devices and PVs in a modified IEEE 34-bus system. The effectiveness and features of the method are clearly illustrated on that test system by considering a time-varying load and PV generation. The obtained results demonstrate the practical application of this work to medium-voltage systems. © 2017 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

DOI
Coordinated voltage control of load tap changers in distribution networks with photovoltaic system

Kikusato, Hiroshi, Kobayashi, Masaya, Yoshinaga, Jun, Fujimoto, Yu, Hayashi, Yasuhiro, Kusagawa, Shinichi, Motegi, Noriyuki

IEEE PES Innovative Smart Grid Technologies Conference Europe 2017.02

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© 2016 IEEE. Maintaining voltage levels in distribution networks (DNs) with photovoltaic systems (PVs) is a complicated task for conventional voltage control schemes that only use a load ratio control transformer (LRT) and step voltage regulators (SVRs), because of local voltage fluctuation caused by the introduction of PVs. This paper proposes a coordinated voltage control scheme consisting of multiple kinds of load tap changers (LTCs). The proposed scheme determines the location at which to introduce low-voltage regulators (LVRs) and provides control parameters for the LTCs by considering the behavior of the other LTCs. We carried out numerical simulations using a DN model including PVs to verify the validity of the proposed scheme. The results specify the characteristics of the voltage deviation that cannot be prevented by a conventional voltage control scheme, and the proposed scheme significantly reduces such local voltage deviation.

DOI
Stochastic model predictive control of residential fuel cell cogeneration unit with periodic forecast update for distributed architecture

Akira Yoshida, Jun Yoshikawa, Yu Fujimoto, Yoshiharu Amano, Yasuhiro Hayashi

30th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems, ECOS 2017 2017

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© 2017 IMEKO As communication standard, such as SEP 2.0 and ECHONET Lite, for digital communication of home appliances has been established, the research of networked control system is progressing in the domain of residential house. Instead of building new power station to fulfil new electricity requirement, such as electric vehicle charging, the concept, that an aggregator coordinates massive amount of home energy management system (HEMS) to supply negawatt power, is proposed. The aggregator requires to manipulate electricity consumption through massive amount of HMES as networked control system. As fundamental study for control algorithm of distributed architecture, this paper constructed one of the networked supervisory control system formulated as stochastic model predictive control scheme, and analysed primary energy consumption sensitivity against update interval of energy demand forecasting and operational strategy in addition to changing number of scenarios. The mainly results are concluded that: as the energy saving ratio in the case of 6 hours update interval has enough high point, which is 9.5% in comparison with the case of 24 hours update interval, the stochastic model predictive control scheme proposed in the case using six scenarios can downsample until 6 hours update interval.
Deployment of low-voltage regulator considering existing voltage control in medium-voltage distribution systems

Hiroshi Kikusato, Jun Yoshinaga, Yu Fujimoto, Yasuhiro Hayashi, Shinichi Kusagawa, Noriyuki Motegi

Journal of Internatinal Council on Electrical Engineering (JICEE), Vol.6, No.1 6 ( 1 ) 2016.12 [Refereed]
Upgrading Voltage Control Method Based on Photovoltaic Penetration Rate

Satoru Akagi, Ryo Takahashi, Akihisa Kaneko, Masakazu Ito, Jun Yoshinaga, Yasuhiro Hayashi

IEEE Transactions on Smart Grid, VOL.9, No.5 9 ( 5 ) 2016.12 [Refereed]
ゼロエネルギーハウスの設計・建設と四季の計測－早稲田大学『Nobi-Nobi HOUSE～重ね着するすまい』－

長澤夏子, 渋谷彩音, 松永知大, 田辺新一, 古谷誠章, 渡辺直哉, 広橋亘, 林泰弘

日本建築学会技術報告集、第22巻、第52号 22 ( 52 ) 2016.10 [Refereed]
Design and construction of zero energy house: - Waseda University "Nobi-Nobi HOUSE"

Nagasawa, Natsuko, Shibutani, Ayane, Matsunaga, Tomohiro, Tanabe, Shin Ichi, Furuya, Nobuaki, Watanabe, Naoya, Hirohashi, Wataru, Hayashi, Yasuhiro

AIJ Journal of Technology and Design 22 ( 52 ) 1049 - 1052 2016.10

　View Summary

Waseda University and various enterprises proposed a Zero-Energy-House(ZEH) called "Nobi-Nobi HOUSE" in ENEMANEHOUSE2014. In this ZEH, we carried out a design for the ZEH technology, and was build in Tokyo at January 2014. After the relocated in Shizuoka, it was measured every four seasons in energy consumption, electric-generating capacity and indoor environment. This report shows design of "Nobi-Nobi HOUSE" for ZEH and result of measurement.

DOI
Coordinated Voltage Control of Load Tap Changers in Distriution Networks with Photovoltaic System

Hiroshi Kikusato, Masaya Kobayashi, Jun Yoshinaga, Yu Fujimoto, Yasuhiro Hayashi

IEEE PES Innovative Smart Grid Technologies, Europe 1 - 6 2016.10

　View Summary

Maintaining voltage levels in distribution networks
(DNs) with photovoltaic systems (PVs) is a complicated task for
conventional voltage control schemes that only use a load ratio
control transformer (LRT) and step voltage regulators (SVRs),
because of local voltage fluctuation caused by the introduction of
PVs. This paper proposes a coordinated voltage control scheme
consisting of multiple kinds of load tap changers (LTCs). The
proposed scheme determines the location at which to introduce
low-voltage regulators (LVRs) and provides control parameters
for the LTCs by considering the behavior of the other LTCs. We
carried out numerical simulations using a DN model including
PVs to verify the validity of the proposed scheme. The results
specify the characteristics of the voltage deviation that cannot be
prevented by a conventional voltage control scheme, and the
proposed scheme significantly reduces such local voltage
deviation.
Maximizing hosting capacity of distributed generation by network reconfiguration in distribution system

Takenobu, Yuji, Kawano, Shunsuke, Hayashi, Yasuhiro, Yasuda, Norihito, Minato, Shin Ichi

19th Power Systems Computation Conference, PSCC 2016 2016.08

　View Summary

© 2016 Power Systems Computation Conference.The maximization of distributed generation (DG) hosting capacity that takes into account network configuration is a complex, non-linear combinatorial optimization problem. The search space of the configurations becomes massively large in practical-size networks with several hundreds of switches. For this reason, no existing method can handle such large-scale networks. In this paper, we propose a novel exact solution method. Our method consists of two stages. In the first stage, the method divides the entire problem into a set of small subproblems. In the second stage, it converts all subproblems into a compressed data structure called a zero-suppressed binary decision diagram (ZDD), which expresses the combinatorial sets compactly. The proposed method avoids any combinatorial explosion by using the ZDD to enable operations of the weighted combinatorial item sets. We conducted experiments on a large-scale network with 235 switches. As a result, our method obtained the global optimal solution in 49 hours.

DOI
Method for enumerating feasible LDC parameters for OLTC and SVR in distribution networks

Kawano, Shunsuke, Yoshizawa, Shinya, Hayashi, Yasuhiro

Proceedings of the 2nd International Conference on Intelligent Green Building and Smart Grid, IGBSG 2016 2016.08

　View Summary

© 2016 IEEE.This paper presents a method for enumerating the feasible load drop compensator (LDC) parameters of on-load tap changer (OLTC) and step voltage regulators (SVRs) in distribution networks utilizing data acquired by SCADA. Deriving the feasible combinations of LDC parameters is becoming important because voltage control is becoming difficult due to the introduction of photovoltaic generation systems, and the voltage control effectiveness of OLTC and SVRs depends on their three LDC parameters: the target voltage, the dead-band, and the impedance. However, an exhaustive search takes a lot of time and heuristics or metaheuristics provide no guarantee on the quality of the solution. The proposed method derives all the feasible LDC parameters, with which tap operation keeping voltage within the proper range is performed, within practical time. To evaluate the performance of the proposed method, the numerical simulation results of the proposed method will be compared with those of the metaheuristics.

DOI
Detection of Cyber Attacks Against Voltage Control in Distribution Power Grids With PVs

Yasunori Isozaki, Shinya Yoshizawa, Yu Fujimoto, Hideaki Ishii, Isao Ono, Takashi Onoda, Yasuhiro Hayashi

IEEE Transactions on Smart Grid, Vol.7, No.4 7 ( 4 ) 2016.07 [Refereed]
Centralized voltage control method using voltage forecasting by JIT modeling in distribution networks

Kawano, Shunsuke, Yoshizawa, Shinya, Hayashi, Yasuhiro

Proceedings of the IEEE Power Engineering Society Transmission and Distribution Conference 2016-July 2016.07

　View Summary

© 2016 IEEE.This paper presents an enhanced centralized voltage control method of on-load tap changer (OLTC) and step voltage regulators (SVRs) in distribution systems with photovoltaic (PV) and evaluates its effectiveness. A conventional centralized voltage control is effective when its data acquisition period is short because tap operations of OLTC and SVRs are performed after the voltage values in the distribution lines are acquired. However, in distribution systems with high penetration rate of PVs, voltage deviation occurs between the data acquisition intervals because the tap positions can be changed only at the timing when the data are acquired. The proposed centralized voltage control method forecasts voltage fluctuation between the data acquisition intervals and changes to the tap position which maximizes the minimum voltage margin from the voltage limits. The numerical simulation results will be shown to compare the voltage control effectiveness of the proposed method with that of the conventional method.

DOI
Detection of Cyber Attacks Against Voltage Control in Distribution Power Grids with PVs

Isozaki, Yasunori, Yoshizawa, Shinya, Fujimoto, Yu, Ishii, Hideaki, Ono, Isao, Onoda, Takashi, Hayashi, Yasuhiro

IEEE Transactions on Smart Grid 7 ( 4 ) 1824 - 1835 2016.07

　View Summary

© 2010-2012 IEEE.In this paper, we consider the impact of cyber attacks on voltage regulation in distribution systems when a number of photovoltaic (PV) systems are connected. We employ a centralized control scheme that utilizes voltage measurements from sectionizing switches equipped with sensors. It is demonstrated that if measurements are falsified by an attacker, voltage violation can occur in the system. However, by equipping the control with a detection algorithm, we verify that the damage can be limited especially when the number of attacked sensors is small through theoretical analysis and simulation case studies. In addition, studies are made on attacks which attempt to reduce the output power at PV systems equipped with overvoltage protection functions. Further discussion is provided on how to enhance the security level of the proposed algorithm.

DOI
Robust Operation Planning Method for Integrated Solid Oxide Fuel Cells in a Collective Housing with Electric Power Interchange System Considering Uncertainty in Demand Forecast

Runa Kato, Yu Fujimoto, Yasuhiro Hayashi

IEEJ Transactions on Power and Energy 136 ( 6 ) 528 - 536 2016.06 [Refereed]

　View Summary

The subject of this study is to propose a power interchange system in a collective housing with residential solid oxide fuel cells (SOFCs) and a robust operation planning method for integrated SOFCs against uncertain energy demand forecast. In this method, the future operation plan for multiple SOFCs is optimized and determined to minimize the expected total primary energy consumption in the collective housing considering uncertainty in demand forecast. If the forecast energy demand includes forecast errors, the result of SOFCs operation will corrupt from the viewpoint of the primary energy consumption. Thus, the output decision problem for SOFCs is formulated by considering the corruption caused by forecast errors, so that the decided SOFC outputs have the robustness against uncertainty in demand forecast. The validity of the proposed method is examined based on numerical simulations from the perspective of the robustness.

DOI
Robust Operation Planning Method for Integrated Solid Oxide Fuel Cells in a Collective Housing with Electric Power Interchange System Considering Uncertainty in Demand Forecast

Runa Kato, Yu Fujimoto, Yasuhiro Hayashi

IEEJ Transactions on Power and Energy 136 ( 6 ) 528 - 536 2016.06 [Refereed]

　View Summary

The subject of this study is to propose a power interchange system in a collective housing with residential solid oxide fuel cells (SOFCs) and a robust operation planning method for integrated SOFCs against uncertain energy demand forecast. In this method, the future operation plan for multiple SOFCs is optimized and determined to minimize the expected total primary energy consumption in the collective housing considering uncertainty in demand forecast. If the forecast energy demand includes forecast errors, the result of SOFCs operation will corrupt from the viewpoint of the primary energy consumption. Thus, the output decision problem for SOFCs is formulated by considering the corruption caused by forecast errors, so that the decided SOFC outputs have the robustness against uncertainty in demand forecast. The validity of the proposed method is examined based on numerical simulations from the perspective of the robustness.
Estimation Prediction Interval of Solar Irradiance Based on Just-in-Time Modeling for Photovoltaic Output Prediction

Yamazaki, Tomohide, Yamazaki, Tomohide, Homma, Hayato, Homma, Hayato, Wakao, Shinji, Wakao, Shinji, Fujimoto, Yu, Hayashi, Yasuhiro, Hayashi, Yasuhiro

Electrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi) 195 ( 3 ) 1 - 10 2016.05

　View Summary

© 2016 Wiley Periodicals, Inc. Photovoltaic (PV) systems have recently attracted considerable attention in the context of environmental problems, antinuclear power movements, and energy problems. Therefore, the large-scale introduction of PV systems is expected in the near future. But the connection of many PV systems to the power system leads to problems. For example, the system voltage often drifts from the norm when reverse power flows increase. Accordingly, optimal system operation is required in order to make maximum use of solar energy to the maximum by installing energy buffers such as storage batteries. In particular, in forecast information, knowledge of the reliability as well as the predicted solar irradiance is essential for effective operation. In this paper, we propose a way of estimating the prediction interval of solar irradiance as an index of reliability by using just-in-time modeling. We consider the accuracy of the prediction interval under many conditions and derive a high-precision estimation method. In addition, we also discuss about the future subjects of study.

DOI
Experimental Demonstration of Smart Charging and Vehicle-to-Home Technologies for Plugin Electric Vehicles Coordinated with Home Energy Management Systems for Automated Demand Response

Takayuki Shimizu, Tomoya Ono, Wataru Hirohashi, Kunihiko Kumita, Yasuhiro Hayashi

SAE International Journal of Passenger Cars - Electronic and Electrical Systems, 9 (2) 9 ( 2 ) 2016.04 [Refereed]
Generating Synthetic Profiles of Onshore Wind Power for Power Flow Simulation on Power System

Yu Fujimoto, Seigo Furuya, Yasuhiro Hayashi, Tetsuya Osaka

Journal of Energy Engineering 2016.03
Effectiveness of Improvement of Benefit of the Electric Power Selling Charges and Electricity Charges using Battery Storage System and Heat Pump Water Heater for High Penetration PV

Yusuke Miyamoto, Yasuhiro Hayashi

IEEJ Transactions on Power and Energy 136 ( 3 ) 245 - 258 2016.03 [Refereed]

　View Summary

Recently home energy management system (HEMS) has been spread due to increase in awareness of save energy after Great East Japan Earthquake. HEMS consists of photovoltaic power system (PV), battery energy storage system (BESS) and heat pump water heater (HPWH), etc. Residential PV implementation rate has been increasing due to feed in tariff from 2009. So there is a danger of output suppression loss due to voltage increase on a distribution line due to reverse power flow from each residential PV. So we try to study how to reduce output suppression loss using BESS and HPWH optimally. One of the main purpose to implement BESS and HPWH is for economy using the difference in electricity charges between during nighttime and daytime. So in this research, we optimize how to operate BESS and HPWH to improve the benefit of the electric power selling charges and electricity charges considering reduction of output suppression loss and the difference in electricity charges between during nighttime and daytime.
Cooperating Voltage Control Method between Battery Energy Storage System and LRT and SVR for Purpose of Expansion of PV Introduction

Jun Yoshinaga, Satoru Akagi, Masakazu Ito, Yasuhiro Hayashi, Kazunari Ishibashi

IEEJ Transactions on Power and Energy 136 ( 3 ) 291 - 301 2016.03

　View Summary

Voltage deviation in distribution networks and photovoltaic (PV) output restriction, caused by a large amount of PV systems installation, have been issued recently. BESS (Battery Energy Storage System) is one of the solutions. However, the detailed evaluation of the voltage control effect of BESS has not been carried out, because its effect varies according to BESS placement, its output and configuration of distribution, etc. Therefore, the amount of PV introduction limits in several distribution networks were evaluated and effective BESS arrangement and output control were examined in this paper. The effectiveness of the proposed BESS cooperating voltage control method with LRT, SVR was verified using numerical simulation and experiment of distribution system simulator.
Generating Synthetic Profiles of Onshore Wind Power for Power Flow Simulation on Power System

Yu Fujimoto, Seigo Furuya, Yasuhiro Hayashi, Tetsuya Osaka

Journal of Energy Engineering 143 ( 3 ) 2016.03

　View Summary

© 2016 American Society of Civil Engineers. An increased penetration of wind energy into the power system will lead to instability of local voltage and global frequency in Japan. Power flow simulation is a powerful tool for understanding the electrical behavior in the power system caused by wind energy; however, plausible and various wind power profiles are required to perform a meaningful simulation to evaluate the effect of wind generators. This paper proposes a procedure of generating synthetic wind power profiles that involve the plausible short-term fluctuation for a power flow simulation based on the spatial kriging method and the bootstrap method.

DOI
Practical Study Related to Realization of Zero Energy House

Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan 2014 89 - 92 2016

DOI CiNii
Development of Smart City Electric Power Flow Simulation Model Considering Demand Response Part1：Development of Residential Area Electric Power Flow Simulation Model and Verification of the Effect of Demand Response

Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan 2015 53 - 57 2016

DOI CiNii
スマートハウスにおける窓システムとエアコンの協調制御の評価

江部真里奈, 竹中大史, 海野玄陽, 田辺新一, 庄司智昭, 吉田彬, 林泰弘

空気調和・衛生工学会大会学術講演論文集 2014 185 - 188 2016

　View Summary

<p>PMVを用いて熱的快適性を考慮した上で、窓・日射遮蔽ブラインド・断熱ブラインドなどの窓システムとエアコンを協調制御した場合とエアコンのみを単体制御した場合のシミュレーション解析を行い、エアコン単体制御に対する協調制御の電力消費量削減分を求めた。各制御システムに対して、それぞれ異なる気象条件下で解析、PMVの快適範囲を変化させた解析を行った。結果として、熱的快適性と省エネルギー性を両立した窓システムとエアコンの協調制御の有効性を示した。</p>

DOI CiNii
Automatic control with ECHONET Lite

Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan 2016 441 - 444 2016
Versatile Demonstration Platform and its Utilization for Methodology Development in Cooperative Distributed Energy Management System

FUJIMOTO Yu, HAYASHI Yasuhiro

Journal of The Society of Instrument and Control Engineers 55 ( 7 ) 592 - 597 2016
Robust Operation Planning Method for Integrated Solid Oxide Fuel Cells in a Collective Housing with Electric Power Interchange System Considering Uncertainty in Demand Forecast

Kato Runa, Fujimoto Yu, Hayashi Yasuhiro

The transactions of the Institute of Electrical Engineers of Japan.B 136 ( 6 ) 528 - 536 2016

　View Summary

The subject of this study is to propose a power interchange system in a collective housing with residential solid oxide fuel cells (SOFCs) and a robust operation planning method for integrated SOFCs against uncertain energy demand forecast. In this method, the future operation plan for multiple SOFCs is optimized and determined to minimize the expected total primary energy consumption in the collective housing considering uncertainty in demand forecast. If the forecast energy demand includes forecast errors, the result of SOFCs operation will corrupt from the viewpoint of the primary energy consumption. Thus, the output decision problem for SOFCs is formulated by considering the corruption caused by forecast errors, so that the decided SOFC outputs have the robustness against uncertainty in demand forecast. The validity of the proposed method is examined based on numerical simulations from the perspective of the robustness.
Voltage Fluctuation Issue on Distribution System at Time of Demand Response and Cooperating Voltage Control Method between Battery Energy Storage System and SVR

Yoshinaga Jun, Akagi Satoru, Ito Masakazu, Hayashi Yasuhiro, Ishibashi Kazunari, Takahasi Naoyuki

The transactions of the Institute of Electrical Engineers of Japan.B 136 ( 4 ) 400 - 409 2016

　View Summary

Demand response can achieve peak-cut and peak-shift of the electric demand by delivering the load restraint of customers, based on Demand Response (DR) signal sent by an electric power company. However, the demand response restrains the load amount of many consumers simultaneously, so the voltage of the whole distribution system is greatly fluctuated depending on the distribution form such as line length, amount of load restraint, etc. Therefore, we propose the voltage control methods which can avoid voltage deviation in consideration of a time constant of demand response. Furthermore, we propose the BESS cooperating voltage control methods with LRT, SVR and verify the effectiveness using experiment of distribution system simulator.
Effectiveness of Improvement of Benefit of the Electric Power Selling Charges and Electricity Charges using Battery Storage System and Heat Pump Water Heater for High Penetration PV

Miyamoto Yusuke, Hayashi Yasuhiro

The transactions of the Institute of Electrical Engineers of Japan.B 136 ( 3 ) 245 - 258 2016

　View Summary

Recently home energy management system (HEMS) has been spread due to increase in awareness of save energy after Great East Japan Earthquake. HEMS consists of photovoltaic power system (PV), battery energy storage system (BESS) and heat pump water heater (HPWH), etc. Residential PV implementation rate has been increasing due to feed in tariff from 2009. So there is a danger of output suppression loss due to voltage increase on a distribution line due to reverse power flow from each residential PV. So we try to study how to reduce output suppression loss using BESS and HPWH optimally. One of the main purpose to implement BESS and HPWH is for economy using the difference in electricity charges between during nighttime and daytime. So in this research, we optimize how to operate BESS and HPWH to improve the benefit of the electric power selling charges and electricity charges considering reduction of output suppression loss and the difference in electricity charges between during nighttime and daytime.
Cooperating Voltage Control Method between Battery Energy Storage System and LRT and SVR for Purpose of Expansion of PV Introduction

Yoshinaga Jun, Akagi Satoru, Ito Masakazu, Hayashi Yasuhiro, Ishibashi Kazunari

The transactions of the Institute of Electrical Engineers of Japan.B 136 ( 3 ) 291 - 301 2016

　View Summary

Voltage deviation in distribution networks and photovoltaic (PV) output restriction, caused by a large amount of PV systems installation, have been issued recently. BESS (Battery Energy Storage System) is one of the solutions. However, the detailed evaluation of the voltage control effect of BESS has not been carried out, because its effect varies according to BESS placement, its output and configuration of distribution, etc. Therefore, the amount of PV introduction limits in several distribution networks were evaluated and effective BESS arrangement and output control were examined in this paper. The effectiveness of the proposed BESS cooperating voltage control method with LRT, SVR was verified using numerical simulation and experiment of distribution system simulator.
Evaluation of annual energy loss reduction based on reconfiguration scheduling

Takenobu, Yuji, Yasuda, Norihito, Yasuda, Norihito, Kawano, Shunsuke, Hayashi, Yasuhiro, Minato, Shin Ichi

IEEE Transactions on Smart Grid PP ( 99 ) 2016.01

　View Summary

© 2010-2012 IEEE.In distribution network management, switch reconfiguration is an important tool for reducing energy loss. Recently, a variety of annual reconfiguration planning methods considering energy loss have been studied. However, no conventional methods address the reconfiguration periods in fine granularity. Practically, switch durability does not support high-frequency switching. Therefore, this paper proposes a new optimization method for annual reconfiguration scheduling. This method determines switch configurations and their reconfiguration periods with a constraint on the permissible reconfiguration times. In addition, this paper reveals the annual energy loss reduction effect of this optimization. Our method is based on partial network optimization with exhaustive enumeration of all feasible configurations. Experiments were conducted using a standard Japanese distribution network model with 468 switches. The results show that optimizing the reconfiguration periods reduces energy loss by up to 2.1 times, relative to that in a simulated conventional operation, which considers reconfiguration at equal intervals. We believe that this is the first quantitative report to address the difference between optimal reconfiguration scheduling and conventional reconfiguration.

DOI
Energy disaggregation based on semi-binary NMF

Matsumoto, Masako, Fujimoto, Yu, Hayashi, Yasuhiro

Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 9729 401 - 414 2016.01

　View Summary

© Springer International Publishing Switzerland 2016.The large-scale introduction of renewable energy resources will cause instability in the power supply. Residential energy management systems will be even more important in the near future. An important function of such systems is visualization of appliance-wise energy consumption; residents will be able to consciously avoid unnecessary consumption behavior. However, visualization requires sensors to measure appliance-wise energy consumption and is generally a costly task. In this paper, an unsupervised method for nonintrusive appliance load monitoring based on a semi-binary non-negative matrix factorization model is proposed. This framework utilizes the total power consumption patterns measured at the circuit breaker panel in a house, and derives disaggregated appliance-wise energy consumption. In the proposed approach, the energy consumption of individual appliances is estimated by considering the appliance-specific variances based on an aggregated energy consumption data set. The authors implement the proposed method and evaluate disaggregation accuracy using real world data sets.

DOI
Determination of the most suitable voltage control method depending on photovoltaic installation rate

Akagi, Satoru, Takahashi, Ryo, Kaneko, Akihisa, Ito, Masakazu, Yoshinaga, Jun, Hayashi, Yasuhiro, Konda, Hiromi

Asia-Pacific Power and Energy Engineering Conference, APPEEC 2016-January 2016.01

　View Summary

© 2015 IEEE.In this study, we determine the suitable method and timing for the renewal of the voltage control method using voltage control performance evaluated by the maximum photovoltaic (PV) installation rate possible without voltage deviation. The voltage control method is renewed when the voltage of a distribution system deviates with an existing voltage control method. We determine the most suitable voltage control method, which extends the most PV systems, and define its renewal timing as the moment when the PV installation causes voltage deviation. For the renewal of the voltage control method, changing the control operation of a load ratio control transformer (LRT) and the additional installation of a static VAR compensator (SVC) are considered. A numerical simulation is performed to calculate the limit of PV installation rate of each voltage control method to determine the suitable one and its renewal timing.

DOI
Distributed Energy Management for Comprehensive Utilization of Residential Photovoltaic Outputs

Yu Fujimoto, Hiroshi Kikusato, Shinya Yoshizawa, Shunsuke Kawano, Akira Yoshida, Shinji Wakao, Noboru Murata, Yoshiharu Amano, Shin-ichi Tanabe, Yasuhiro Hayashi

IEEE Transactions on Smart Grid PP ( 99 ) 2016.01 [Refereed]

　View Summary

The introduction of photovoltaic power systems is being significantly promoted. This paper proposes the implementation of a distributed energy management framework linking demand-side management systems and supply-side management system under the given time-of-use pricing program for efficient utilization of photovoltaic power outputs; each system implements a consistent management flow composed of forecasting, operation planning, and control steps. In our framework, demandside systems distributed in the electric distribution network manage individual energy consumption to reduce the residential operating cost by utilizing the residential photovoltaic power system and controllable energy appliances so as not to inconvenience residents. On the other hand, the supply-side system utilizes photovoltaic power maximally while maintaining the quality of electric power. The effectiveness of the proposed framework is evaluated on the basis of an actual Japanese distribution network simulation model from both the supply-side and demand-side viewpoints
Voltage fluctuation issue on distribution system at time of demand response and cooperating voltage control method between battery energy storage system and SVR

Yoshinaga, Jun, Yoshinaga, Jun, Akagi, Satoru, Akagi, Satoru, Ito, Masakazu, Ito, Masakazu, Hayashi, Yasuhiro, Hayashi, Yasuhiro, Ishibashi, Kazunari, Takahasi, Naoyuki, Takahasi, Naoyuki

IEEJ Transactions on Power and Energy 136 ( 4 ) 400 - 409 2016.01

　View Summary

© 2016 The Institute of Electrical Engineers of Japan. Demand response can achieve peak-cut and peak-shift of the electric demand by delivering the load restraint of customers, based on Demand Response (DR) signal sent by an electric power company. However, the demand response restrains the load amount of many consumers simultaneously, so the voltage of the whole distribution system is greatly fluctuated depending on the distribution form such as line length, amount of load restraint, etc. Therefore, we propose the voltage control methods which can avoid voltage deviation in consideration of a time constant of demand response. Furthermore, we propose the BESS cooperating voltage control methods with LRT, SVR and verify the effectiveness using experiment of distribution system simulator.

DOI
Study on business continuity capability by cooperative operation of photovotaic and battery energy storage system

Maruyama, Hiroki, Ishii, Hideo, Hayashi, Yasuhiro, Onojima, Hajime, Kojima, Yoshikane

Asia-Pacific Power and Energy Engineering Conference, APPEEC 2016-January 2016.01

　View Summary

© 2015 IEEE. In this study, as a new index of facilities, business continuity capability on occasion of an energetically isolated operation, was defined and evaluated for the facility with a rich amount of resources such as private generators, a battery energy storage system and a PV generation system. A methodology was proposed to evaluate a duration during which the facility is self- sustaining regarding energy use. An effect of reducing the capacity of PV or battery was also examined.

DOI
Power and hour capacity requirement for an energy storage from grid codes

Ito, Masakazu, Fujimoto, Yu, Mitsuoka, Masataka, Ishii, Hideo, Hayashi, Yasuhiro

Asia-Pacific Power and Energy Engineering Conference, APPEEC 2016-January 2016.01

　View Summary

© 2015 IEEE. This paper studied power and hour capacity requirement for energy storage by two approaches. First one is evaluations without constrained condition of power and hour capacity with 80 sets of maximum ramp rates and time windows. And second one is evaluations with constrained condition of power and hour capacity for 2 grid codes (less than 0.1pu change of wind farm (WF) capacity in 20min time window, showing 0.1pu/20min in this paper, and 0.3pu/360min) to see details. The first evaluation in case of 3a resulted 1.0 pu power capacity (charge plus discharge capacity for all result) and 1.3 to 2.2 pu-h hour capacity are required to satisfy maximum ramp rate in time window of 0.1pu/20min. And 1.2 to 1.3 pu and 13 to 18 pu-h are required for 0.3pu/360min. And from the second evaluation in case of 3a, 0.7 to 0.8 pu power capacity and 1 to 2 pu-h for 0.1pu/20min and 1.0 pu and 10 to 15 pu-h are required for 0.3pu/360min. This paper provides relationship between maximum ramp rate in time windows and power and hour capacity requirement. The results help to answer questions whether power and hour capacity requirement satisfy grid codes with simple operating method of an energy storage system.

DOI
Effectiveness of improvement of benefit of the electric power selling charges and electricity charges using battery storage system and heat pump water heater for high penetration PV

Miyamoto, Yusuke, Miyamoto, Yusuke, Hayashi, Yasuhiro

IEEJ Transactions on Power and Energy 136 ( 3 ) 245 - 258 2016.01

　View Summary

© 2016 The Institute of Electrical Engineers of Japan. Recently home energy management system (HEMS) has been spread due to increase in awareness of save energy after Great East Japan Earthquake. HEMS consists of photovoltaic power system (PV), battery energy storage system (BESS) and heat pump water heater (HPWH), etc. Residential PV implementation rate has been increasing due to feed in tariff from 2009. So there is a danger of output suppression loss due to voltage increase on a distribution line due to reverse power flow from each residential PV. So we try to study how to reduce output suppression loss using BESS and HPWH optimally. One of the main purpose to implement BESS and HPWH is for economy using the difference in electricity charges between during nighttime and daytime. So in this research, we optimize how to operate BESS and HPWH to improve the benefit of the electric power selling charges and electricity charges considering reduction of output suppression loss and the difference in electricity charges between during nighttime and daytime.

DOI
Reproducing Statistical Property of Short-term Fluctuation in Wind Power Profiles

Seigo Furuya, Yu Fujimoto, Noboru Murata, Yasuhiro Hayashi

10TH INTERNATIONAL RENEWABLE ENERGY STORAGE CONFERENCE, IRES 2016 99 130 - 136 2016 [Refereed]

　View Summary

Unexpected fluctuation of wind power output will become serious problems from the viewpoint of stable supply for an electricity grid. Operating a battery system installed in the grid for mitigating the short-term fluctuation is one of the new approaches for grid stabilization. In this paper, we propose a method of generating synthetic wind power profiles with high temporal resolution for power flow simulation which aims to estimate the impact of wind power fluctuation and specify the required battery system. We numerically show the plausibility of the synthetic wind power profiles from the viewpoints of statistical properties. (C) 2016 The Authors. Published by Elsevier Ltd.

DOI
Improvement of prediction interval estimation algorithm with just-in-time modeling for PV system operation

Yamazaki, Tomohide, Yamazaki, Tomohide, Wakao, Shinji, Wakao, Shinji, Fujimoto, Yu, Fujimoto, Yu, Hayashi, Yasuhiro, Hayashi, Yasuhiro

2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015 2015.12

　View Summary

© 2015 IEEE. Output of the photovoltaic (PV) system drastically fluctuates depending on weather conditions. Therefore users of PV systems should manage their energy usage with forecast information of the PV output. Due to the reasons above, we have developed an estimation method of X% prediction interval of solar irradiance. We have achieved a high-accuracy prediction interval for any prediction coefficient X%. However, we found that there are some errors in a case where the prediction coefficient is high. In this paper, we improve the estimation algorithm of the prediction interval.

DOI
Personalized Energy Management System for Home Appliances Based on Bayesian Networks

Tomoaki Shoji, Wataru Hirohashi, Yu Fujimoto, Yoshiharu Amano, Shin-ichi Tanabe, Yasuhiro Hayashi

Journal of International Council on Electrical Engineering, Vol.5, No.1 5 ( 1 ) 2015.11 [Refereed]
Islanding operation methods integrated with multiple power supplies and HEMS

Yoshinaga, Jun, Hirohashi, Wataru, Hayashi, Yasuhiro, Isoe, Yasuhito, Miyake, Jiro, Tsuchiya, Shizuo, Wada, Mikihiko

Proceedings - 2015 International Symposium on Smart Electric Distribution Systems and Technologies, EDST 2015 436 - 441 2015.11

　View Summary

© 2015 IEEE. This paper investigates the operation of various possible standalone power supply configurations for smart houses with a view to preventing inconvenience to residents when blackouts occur. In smart houses, various types of power-generation equipment (such as photovoltaic (PV), battery energy storage system (BESS), electric vehicle (EV), and fuel cell (FC) systems) with different output power, capacity, and response time characteristics are used. Our results indicate that combined use of these equipment and home energy management system (HEMS) control provide the best means of enabling residents to effectively use household appliances even in limited power supply situations.

DOI
Personalized Energy Management Systems for Home Appliances Based on Bayesian Networks

Tomoaki Shoji, Wataru Hirohashi, Yu Fujimoto, Yoshiharu Amano, Shin-ichi Tanabe, Yasuhiro Hayashi

Journal of International Council on Electrical Engineering 2015.11
Dynamic Updating Method of Optimal Control Parameters of Multiple Advanced SVRs in a Single Feeder

Yoshizawa Shinya, Yamamoto Yuya, Hayashi Yasuhiro, Sasaki Shunsuke, Shigeto Takaya, Nomura Hideo

IEEJ Transactions on Power and Energy 135 ( 9 ) 550 - 558 2015.09

　View Summary

This paper proposes a dynamic updating method of the optimal control parameters of multiple advanced step voltage regulators (SVRs) in a single feeder considering a massive introduction of photovoltaic (PV) systems. Each advanced SVR can adjust their tap position according to the updated control parameters in a certain period. The main feature of the proposed method is that the optimal parameters which minimize the voltage violation amount from the proper range and the tap operation count of SVR are determined quickly based on greedy algorithm. A numerical simulation is carried out on an actual distribution system model with the measured PV and load data so that the effectiveness of the proposed method can be evaluated.

DOI CiNii
Dynamic voltage regulator operation with demand side management for voltage control

Mufaris, A. L M, Baba, J, Yoshizawa, S, Hayashi, Y

2015 IEEE Eindhoven PowerTech, PowerTech 2015 2015.08

　View Summary

© 2015 IEEE. Widespread interconnection of Photovoltaic (PV) systems in the distribution system may create voltage rise problem. In this paper, a decentralized voltage control method by use of voltage regulators (VRs) and demand side management using consumer controllable load has been proposed for voltage rise compensation. The proposed method includes a novel determination method to find dynamic line drop compensation (LDC) parameters for a VR that has reverse power flow using the measured line current through VR and an optimal method that determines a dead band for a VR in order to lessens the number of tap operations while minimizing voltage deviation and violation. The obtained results show that voltage violation is extensively mitigated by the proposed method and no significant increment in tap operations of VR is encountered.

DOI
OLTC and multiple SVRs in distribution system by using database

Kawano, Shunsuke, Yoshizawa, Shinya, Fujimoto, Yu, Hayashi, Yasuhiro

IYCE 2015 - Proceedings: 2015 5th International Youth Conference on Energy 2015.08

　View Summary

© 2015 IEEE. This paper presents a new method for determining the load drop compensator (LDC) parameters of On-load tap changer (OLTC) and step voltage regulators (SVRs) in the distribution system. Introduction of photovoltaic generation systems (PVs) into a distribution system makes determining the appropriate LDC parameters difficult, which may cause voltage deviation because reverse power flow from PVs affects voltage. Especially in the distribution system in which multiple SVRs are installed, determining the appropriate combination of LDC parameters becomes difficult. In the proposed method, the parameters are reset every hour by choosing one LDC parameter from a database including feasible parameters in the past. To create the database, the proposed method hourly enumerates the feasible parameters utilizing data acquired by SCADA. To evaluate the performance of the proposed method, the amount of voltage deviation of the proposed method will be compared with that of a centralized control method.

DOI
Distribution automation system for service restoration involving simultaneous disconnection and reconnection of distributed generators

Kawano, Shunsuke, Fujimoto, Yu, Wakao, Shinji, Hayashi, Yasuhiro, Irie, Hitoshi, Takenaka, Hideaki, Nakajima, Takashi Y

2015 IEEE Eindhoven PowerTech, PowerTech 2015 2015.08

　View Summary

© 2015 IEEE. This paper presents a distribution automation system (DAS) for service restoration in the distribution network with photovoltaic (PV) generator systems, which are disconnected simultaneously after a fault and subsequently reconnected after service restoration. Because the reverse power flow of PVs affects voltage in the distribution system, voltage dips and surges occur during the service restoration. However, current DAS do not control voltage regulators such as an on-load tap changer (OLTC) and step voltage regulators (SVRs) during the service restoration. The proposed DAS estimates the voltage in a distribution network considering the simultaneous disconnection of PVs by performing power flow calculations, and it controls the tap position of OLTC and/or SVRs according to the predicted voltage deviation. The voltage after the disconnection of PVs is calculated by estimating the PV output utilizing square kilometer solar radiation data calculated using satellite image data in real time.

DOI
Method for Rapidly Determining Line Drop Compensator Parameters of Low-Voltage Regulator using Classifiers

Kikusato Hiroshi, Takahashi Naoyuki, Yoshinaga Jun, Fujimoto Yu, Hayashi Yasuhiro, Kusagawa Shinichi, Motegi Noriyuki

IEEJ Transactions on Power and Energy 135 ( 7 ) 446 - 453 2015.07

　View Summary

Compensating the voltage within the appropriate range becomes difficult when a large number of photovoltaic (PV) systems are installed. As a solution to this problem, the installation of a low-voltage regulator (LVR) has been studied. In this paper, we propose a method for rapidly and accurately determining the line drop compensator method (LDC) parameters as a part of a voltage management scheme, which consists of prediction, operation, and control. In the proposed method, candidates of the appropriate LDC parameters are selected with low computational cost by using classifiers that learns the relation between power series data and the properness of LDC parameters. We performed numerical simulations to evaluate the validity from the viewpoints of computational time and classification accuracy for determination of the LDC parameters, and verified the voltage control performance of the proposed method.
Distribution Network Verification for Secure Restoration by Enumerating All Critical Failures

Takeru Inoue, Norihito Yasuda, Shunsuke Kawano, Yuji Takenobu, Shin-ichi Minato, Yasuhiro Hayashi

IEEE TRANSACTIONS ON SMART GRID 6 ( 2 ) 843 - 852 2015.03
Estimation method of prediction interval of solar irradiance based on Just-In-Time modeling for photovoltaic output prediction

Tomohide Yamazaki, Tomohide Yamazaki, Hayato Homma, Hayato Homma, Shinji Wakao, Shinji Wakao, Yu Fujimoto, Yu Fujimoto, Yasuhiro Hayashi, Yasuhiro Hayashi

IEEJ Transactions on Power and Energy 135 160 - 167 2015.03

　View Summary

© 2015 The Institute of Electrical Engineers of Japan. PV system recently attracts much attention on the back of environmental problems, antinuclear power movements and energy problems. Therefore, a large scale introduction of PV system is expected in the near future. On the other hand, a lot of PV systems connected to the power system bring on some problems. For example, a system voltage often drifts from the norm when the reverse power flow increase. Accordingly, it is necessary to perform an optimal system operation in order to utilize a solar energy to the maximum by installing energy buffers, e.g. storage batteries. Especially, the forecast information i.e., the reliability as well as predicted solar irradiance is essential for the effective operation. In this paper, we propose a way to estimate the prediction interval of the solar irradiance as an index of reliability by using Just-In-Time Modeling (JIT Modeling). We consider the accuracy of the prediction interval under many conditions and derive the high-precision estimation method. In addition, we also talk about the future outlook of this study.

DOI
Advantage of a home energy management system for PV utilization connected to grid

Yoshida A, Yoshizawa S, Fujimoto Y, Murata N, Wakao S, Tanabe S.-I, Hayashi Y, Amano Y

ECOS 2015 - 28th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems 2015 [Refereed]
Coordinated BESS and LRT Control for Voltage Stabilization of a PV-Supplied Microgrid

Khoa Le Dinh, Yasuhiro Hayashi

IEEJ Transactions on Power and Energy 134 ( 10 ) 875 - 884 2014.10
Determination Method of Operation Plan for Fuel Cells in Collective Housing with Electric Power Interchange System

Kameda Manato, Fujimoto Yu, Hayashi Yasuhiro

IEEJ Transactions on Power and Energy 134 ( 8 ) 682 - 691 2014.08

　View Summary

In this paper, the authors propose an electric power interchange system in collective housing with fuel cells (FCs) and a determination method of operation plan for FCs in the collective housing. In the method, the operation plan for FCs is determined from an evaluation point, primary energy consumption of all houses in the collective housing, based on an enumeration method and particle swarm optimization (PSO) which is one of non-liner optimization methods. In order to examine the validity of the determination method, numerical simulations are carried out for the collective housing model, primary energy consumptions of the model are compared to those of a standard system (without FCs), and the reduction effects are evaluated taking uncertainty into consideration by using 10,000 demand patterns which are represented by 40 observational demand data based on the bootstrap method. In addition, the reduction effects by reducing introduced FCs by half are also evaluated from the point of primary energy consumptions, operating efficiency and running efficiency.
Evaluation of CO2 Reduction and Primary Energy Savings for Collective Housing with Fuel Cells Considering Variability in Demand

KAMEDA, Manato, FUJIMOTO, Yu, HAYASHI, Yasuhiro

Journal of Energy and Power Engineering 8 ( 2 ) 274 - 281 2014.02
Verification of Efficiency of Searching Methods Determining Optimal Control Parameters of Advanced SVRs

Yuya Yamamoto, Shinya Yoshizawa, Jun Yoshinaga, Yasuhiro Hayashi, Shunsuke Sasaki, Takaya Shigetou, Hideo Nomura

2014 IEEE INTERNATIONAL ENERGY CONFERENCE (ENERGYCON 2014) 1076 - 1082 2014

　View Summary

This paper discusses a method for obtaining optimal voltage control in a distribution system with advanced step voltage regulators (SVRs) by determining the optimal control parameters of the SVRs. As the voltage in a distribution system becomes unstable if a massive amount of solar-generated power is introduced, voltage control devices such as load ratio control transformers (LRTs) and SVRs must be used to stabilize power flow. In this paper, a modified method of voltage control based on existing techniques for determining the optimal control parameters of multiple advanced SVRs is proposed as a means of maintaining power flow stability as solar power generation facilities are introduced.
Novel Voltage Control of Multiple Step Voltage Regulators in a Distribution System

Shinya Yoshizawa, Yuya Yamamoto, Jun Yoshinaga, Yasuhiro Hayashi, Shunsuke Sasaki, Takaya Shigetou, Hideo Nomura

2014 IEEE PES INNOVATIVE SMART GRID TECHNOLOGIES CONFERENCE (ISGT) 2014

　View Summary

This paper presents a novel method for determining the control parameters and a voltage control method for multiple step voltage regulators (SVRs) in a single feeder. The main purpose of the proposed method is to reduce the amount of voltage violation and the tap operation times and to extend the voltage margin from the upper and lower voltage limits by updating the control parameters of the SVRs. To determine the control parameters of the SVRs, an improved greedy algorithm is used. In order to verify the proposed method, a numerical and experimental simulation study based on an actual distribution model is carried out. The results show that the proposed control method has the capability to reduce the amount of the voltage violation in a distribution system and the tap operation times of the SVRs.
Voltage Control of Multiple Step Voltage Regulators by Renewing Control Parameters

Shinya Yoshizawa, Yuya Yamamoto, Jun Yoshinaga, Yasuhiro Hayashi, Shunsuke Sasaki, Takaya Shigetou, Hideo Nomura

2014 POWER SYSTEMS COMPUTATION CONFERENCE (PSCC) 2014

　View Summary

This paper presents a novel method of determining the control parameters and a voltage control method for multiple step voltage regulators (SVRs) in a single feeder. The main feature of the proposed method is the updating of the control parameters at constant intervals to minimize the amount of voltage violations and the tap operation times of the SVRs while maximizing the voltage margin from the proper limits in the distribution system. To determine the SVR control parameters, a combined method of a greedy algorithm and a tabu search is used. To verify the proposed method, numerical and experimental simulation studies based on an actual distribution model with photovoltaic (PV) sources are carried out. The results show that the proposed control method can reduce the amount of voltage violations and tap operation times of the SVRs compared with the conventional voltage control method.
Preface to Special Issue on Power System Technologies to Realize Smart Grid

HAYASHI Yasuhiro

IEEJ Transactions on Power and Energy 133 ( 4 ) 297 - 297 2013.04

　View Summary

This article has no abstract.

DOI CiNii
Proposal of Dynamic Voltage Control using SVC with Variable Dead Band in Distribution System

TAKAHASHI Naoyuki, HAYASHI Yasuhiro

IEEJ Transactions on Power and Energy 133 ( 4 ) 396 - 403 2013.04

　View Summary

This paper describes dynamic voltage control method using SVC with controllable dead band that changes dynamically to a node voltage in a distribution system installed SVC. Proposed method consists of three systems. First system detects probability of voltage deviation from proper range of node voltage. Second system is used to stabilize output of SVC based on changing dead band. Third system expect voltage trend. In order to verify the validity of the proposed method in comparison with conventional methods, numerical simulation and experiment were carried out using a distribution system model with RES.
Transmission and Distribution Losses Minimization using Hierarchy Control Method of Transmission System Circuit Breakers and Distribution System Switches for Various PV Penetration Cases

WATANABE Takayuki, HAYASHI Yasuhiro

IEEJ Transactions on Power and Energy 133 ( 4 ) 383 - 395 2013.04

　View Summary

Distribution system has huge number of configuration candidates because the network configuration is determined by state of many sectionalizing switches (SW: opened or closed) installed in terms of keeping power quality, reliability and so on. Transmission system also has huge number of configuration candidates and circuit breakers (CB: opened or closed) as same objective as distribution system. Since feeder current and voltage depend on the network configuration, losses of transmission and distribution systems can be reduced by controlling states of CB and SW. So far, various methods to determine the loss minimum configuration of transmission and distribution systems have been researched. However, a method that hierarchically determines the loss minimum configuration of transmission and distribution system with PV has not been proposed. In addition, power flow of whole system is changed by various PV penetration distribution patterns. Therefore, transmission and distribution losses must be evaluated in various PV penetration cases.In this paper, a hierarchy control method to determine a transmission and distribution loss minimum network configuration by controlling on-off states of CB and SW is proposed. The validity of the proposed method is evaluated to calculate the reduction of whole network loss in a transmission and distribution model with 48 CB and 1404 SW in two kinds of PV penetration cases.
Development and Evaluation of a Fast Voltage Calculation Method for Low-Voltage Distribution System

KAWANO Shunsuke, HAYASHI Yasuhiro, ITAYA Nobuhiko, TAKANO Tomihiro, ONO Tetsufumi

IEEJ Transactions on Power and Energy 133 ( 4 ) 343 - 349 2013.04

　View Summary

Since residential photovoltaic systems trend to increase in low-voltage distribution feeders, it is becoming more important to estimate voltage profile including not only high and middle but low-voltage distribution network to operate distribution systems. In case of using the conventional power flow calculation method based on iterative calculation, it will be taken much time to get voltage values all over low-voltage distribution feeders. This paper presents a new method to calculate voltage quickly keeping the accuracy sufficient for practical operation. In order to check the validity of the proposed method, numerical results are shown by comparing its computation accuracy and time with those of the conventional one.
Cooperation Voltage Control Method of LRT and SVR in Distribution System with PV Systems Corresponding to Bank Fault Restoration

YOSHIZAWA Shinya, HAYASHI Yasuhiro, TSUJI Masaki, KAMIYA Eiji

IEEJ Transactions on Power and Energy 133 ( 4 ) 333 - 342 2013.04

　View Summary

Voltages in distribution system are maintained within a proper voltage range by adjusting a tap position of Load Ratio control Transformer (LRT) and Step Voltage Regulator (SVR). In Japan, many voltage control methods have been researched. However, these conventional methods do not presuppose the bank fault restoration. Since the main purpose of voltage control of the conventional restoration approach is to reduce the amount of voltage violation in distribution system, the number of customers with voltage violation cannot be reduced to zero during a bank fault restoration. In this paper, the authors propose a cooperation voltage control method of LRT and SVR to minimize the number of customers with voltage violation corresponding to the bank fault restoration in distribution systems with PV systems. In the proposed method, the tap position of SVR is controlled after the control of LRT to avoid frequent tap changes and each tap position of voltage control devices is controlled to minimize the number of customers with voltage violation. In order to check the effectiveness of the proposed method, the simulation using distribution system model with PV systems is performed under various conditions.
Evaluation of Voltage Control Effect of Acquisition Period for IT Switch Data

UDAGAWA Tsuyoshi, HAYASHI Yasuhiro, TAKAHASHI Naoyuki, MATSUURA Yasuo, MORITA Tomohiko, MINAMI Masahiro

IEEJ Transactions on Power and Energy 133 ( 4 ) 324 - 332 2013.04

　View Summary

Measured data from IT switches are utilized in order to control voltage in distribution systems with photovoltaic generation systems. However, length of period from the data measurement to the data acquisition from IT switches affects voltage control ability in the distribution automation system. In this paper, a voltage control method by LRT and SVR with the periodic data from IT switches is proposed, and using the method, the effect of the length of the data acquisition period for voltage control is evaluated through numerical simulations in a distribution system model. Furthermore, the optimal length of the data acquisition period is determined according to PV penetration rate.
Japanese Energy Management in Smart Grid after the Great East Japan Earthquake

HAYASHI Yasuhiro

IEEJ Transactions on Power and Energy 133 ( 3 ) 225 - 228 2013.03

　View Summary

The Great East Japan Earthquake drastically changed Japanese energy management scheme in Japanese electrical grid. Stopped nuclear power plants caused a rise of the electricity costs. Demand side energy management scheme such as demand response is newly needed to reduce the peak of electric power demand by using HEMS (Home Energy Management System) and BEMS (Building Energy Management System). This paper describes Japanese trend of energy management based on demand response and international standardization of communications protocol and indicate the future issues and vision.

DOI CiNii
Restraint method of voltage total harmonic distortion in distribution network by power conditioner systems using measured data from IT switches

Shoji Kawasaki, Kazuki Shimoda, Motohiro Tanaka, Hisao Taoka, Junya Matsuki, Yasuhiro Hayashi

ELECTRICAL ENGINEERING IN JAPAN 182 ( 3 ) 19 - 29 2013.02 [Refereed]

　View Summary

The amount of distributed generation (DG) such as photovoltaic systems and wind power generator systems installed in distribution systems has been increasing because of reduction of the effects on the environment. However, harmonic problems in the distribution system are a concern in the context of increased connection of DGs through inverters and the spread of power electronics equipment. This paper proposes a method for the restraint of voltage total harmonic distortion (THD) in a whole distribution network by active filter (AF) operation of multiple power conditioner systems (PCSs). It also proposes a method for determination of the optimal gain of AF operation so as to minimize the maximum value of voltage THD in the distribution network by real-time feedback control with measured data from information technology (IT) switches. In order to verify the validity of the proposed method, numerical calculations are carried out using an analytical model of a distribution network of interconnected DGs with PCSs. (c) 2012 Wiley Periodicals, Inc. Electr Eng Jpn, 182(3): 1929, 2013; Published online in Wiley Online Library (wileyonlinelibrary.com). DOI 10.1002/eej.22354

DOI
A study on accuracy of fault locator in distribution system with distributed generations

Daisuke Iioka, Yasuhiro Hayashi

IEEJ Transactions on Power and Energy 133 ( 6 ) 2 - 522 2013 [Refereed]

　View Summary

A fault locator system in a loop-shaped distribution system with inverter based distributed generations is proposed. An algorithm of proposed fault locator system is based on the impedance obtained by the phase-voltage and line-current at the transformer feeder in the power distribution substation. We have proposed the quadratic equation expressed in terms of fault location. The quadratic equation represents the impedance from the substation to the fault location. Inserting the impedance obtained by the voltage and current at the transformer feeder into the quadratic equation, two candidates of the fault location are obtained. We can select the true fault location from the two candidates by using the characteristics of impedance calculated by the voltage and current at the incoming feeder of distributed generation. The validity of the fault locator system was investigated by PSCAD/EMTDC simulations. As a result, it was found that impedance obtained by the information of the substation and distributed generations are useful for searching the fault location in the loop-shaped distribution system. © 2013 The Institute of Electrical Engineers of Japan.

DOI
Verification of Reduction Effect on Output Suppression through Storage Battery in Residential Area with Clustered PV Systems

T. Fujimori, Y.Miyamoto, Y. Hayashi

Journal of International Council on Electrical Engineering 2 ( 4 ) 377 - 383 2012.10
Method of Optimal Allocation of SVR in Distribution Feeders with Renewable Energy Sources

S. Takahashi, Y. Hayashi, Y. Tsuji, E. Kamiya

Journal of International Council on Electrical Engineering 2 ( 2 ) 159 - 165 2012.04
Experimental Analysis on Influences of Harmonic Voltage at High- Voltage Network on Harmonic Current at Medium-Voltage Network

J. Inagaki, Y. Hayashi, Y. Tada

Journal of International Council on Electrical Engineering 2 ( 2 ) 146 - 152 2012.04
Centralized Voltage Control Method Using Plural D-STATCOM with Controllable Dead Band in Distribution System with Renewable Energy

N. Takahashi, Y. Hayashi

2012 3RD IEEE PES INNOVATIVE SMART GRID TECHNOLOGIES EUROPE (ISGT EUROPE) 2012 [Refereed]

　View Summary

The authors propose voltage control method using centralized control of D-STATCOM with controllable dead band to control all the node voltages dynamically. To maximize the acceptable amount of RES, centralized control system meters each node voltage installed D-STATCOM, and control all the node voltages based on each node voltage. The target voltage of D-STATCOM near a substation is modified by another node voltage to regulate all the node voltages within proper range. The amount of correction for the target voltage is determined by the amount of deviation from a threshold which is set between upper limits of the dead band and proper range. Conventional method has potential to command inappropriate reactive power due to delay time based on communication time and calculation for commands of reactive power. Proposed method compensates for the lack of reactive power based on the delay time using the predictive control.
Determination Method for Loss-Minimum Configuration Considering Reconnection of Distributed Generators

Hirotaka Takano, Takafumi Tomida, Yasuhiro Hayashi, Junya Matsuki

ELECTRICAL ENGINEERING IN JAPAN 176 ( 4 ) 7 - 14 2011.09 [Refereed]

　View Summary

In the field of electrical power system, various approaches, such as utilization of renewable energy, loss reduction, and so on, have been taken to reduce CO(2) emission. So as to work toward this goal, the total number of distributed generators (DGs) using renewable energy connected into 6.6-kV distribution systems has been increasing rapidly. The DGs can reduce distribution loss by appropriate allocation. However, when a fault occurs such as distribution line fault and bank fault, DGs connecting outage sections are disconnected simultaneously. Since the simultaneous disconnection of DGs influences restoration configuration and normal configuration after the restoration, it is necessary to determine the system configuration in the normal state considering simultaneous disconnection of DGs.
In this paper, the authors propose a computation method to determine the loss minimum configuration in the normal state considering reconnection of DGs after simultaneous disconnection by fault occurrence. The feature of determined loss minimum configuration is satisfying with operational constraints even if all DGs are disconnected from the system. Numerical simulations are carried out for a real-scale distribution system model with 252 sectionalizing switches (configuration candidates are 2(252)) and 120 DGs (total output is 38.46 MW which is 23% of total load) in order to examine the validity of the proposed algorithm. (C) 2011 Wiley Periodicals, Inc. Electr Eng Jpn, 176(4): 7-14, 2011; Published online in Wiley Online Library (wileyonlinelibrary.com). DOI 10.1002/eej.

DOI
Verification of Effect of Damper Windings on the Transient Condition of Synchronous Generator

MATSUKI Junya, TAOKA Hisao, HAYASHI Yasuhiro, IWAMOTO Shigeru, DAIKOKU Akihiro

IEEJ Transactions on Power and Energy 131 ( 5 ) 447 - 454 2011.05

　View Summary

This paper describes the results of experimental investigation on the effects of damper winding of a 4-pole synchronous generator at the synchronous generator transient. It is known in the simulation that the damper winding acts effectively at the synchronous generator transient condition. However, experimental proof has not been performed yet. Then, experiments on damper effects were conducted in this paper using a laboratory-scale power system. The damper winding of tested generator consists of 5 damper bars each pole and the number of working damper bars can be changed manually. Damper currents at each bar were measured by a Rogowski coil. FFT analysis was applied to both damper currents and armature currents under different operating conditions. Relationships between damper currents in the rotor and armature currents in the stator were made clearer than before.
Parameter Estimation of Dynamic Load Model in Power System by using Measured Data

Yasuhiro Hayashi, Michiya Tomoda, Junya Matsuki

Journal of International Council on Electrical Engineering 1 ( 2 ) 200 - 206 2011.04
Restraint of Harmonics in Distribution System by Cooperative Control of PV Systems-

TANAKA Motohiro, KAWASAKI Shoji, TAOKA Hisao, MATSUKI Junya, HAYASHI Yasuhiro

2011 ( 86 ) 19 - 24 2011.03
Restraint of Harmonics in Distribution System by Cooperative Control of PV Systems-

TANAKA Motohiro, KAWASAKI Shoji, TAOKA Hisao, MATSUKI Junya, HAYASHI Yasuhiro

2011 ( 49 ) 19 - 24 2011.03
A Determination Method of the Restoration Configuration Considering Many Connections of Distributed Generators

H. Takano, Y. Hayashi, J. Matsuki, S. Sugaya

IEEJ Transaction on Power and Energy 131 ( 2 ) 187 - 195 2011.02 [Refereed]

DOI
Survey of Smart Grid

HAYASHI Yasuhiro

Energy and resources 32 ( 1 ) 22 - 26 2011.01
Multiobjective Optimization Method for Distribution System Configuration Using Pareto Optimal Solution

Yasuhiro Hayashi, Hirotaka Takano, Junya Matsuki, Yuji Nishikawa

ELECTRONICS AND COMMUNICATIONS IN JAPAN 94 ( 1 ) 7 - 16 2011.01 [Refereed]

　View Summary

A distribution network has a huge number of configuration candidates because the network configuration is determined by the states of many sectionalizing switches (opened or closed) installed in terms of keeping power quality, reliability, and so on. Since the feeder current and voltage depend on the network configuration, the distribution loss, voltage imbalance, and bank efficiency can be controlled by changing the states of these switches. In addition, feeder currents and voltages change in response to the outputs of distributed generators (DGs) such as photovoltaic generation systems, wind turbine generation systems, and so on, that are connected to the feeder. Recently, the total number of DGs connected to distribution networks has increased drastically. Therefore, many configuration candidates of distribution networks must be evaluated multiply from various viewpoints such as distribution loss, voltage imbalance, bank efficiency, and so on, considering the power supply from the connected DGs. In this paper, the authors propose a multiobjective optimization method from three evaluation viewpoints, (1) distribution loss, (2) voltage imbalance, and (3) bank efficiency, using Pareto optimal solutions. In the proposed method, after several high-ranking candidates with small distribution loss are extracted by combinatorial optimization, each candidate is evaluated from the viewpoints of voltage imbalance and bank efficiency using the Pareto optimal solution, after which the minimum-loss configuration is chosen as the best configuration among these solutions. Numerical simulations were performed for a real-scale system model consisting of 72 distribution feeders and 234 sectionalizing switches in order to examine the validity of the proposed method. (C) 2010 Wiley Periodicals, Inc. Electron Comm Jpn, 94(1): 7-16, 2011; Published online in Wiley Online Library (wileyonlinelibrary.com). DOI 10.1002/ecj.10271

DOI
Japanese Trend of Advanced Smart Grid Technology for Harmonization of Renewable Energy Resources and Power Systems

HAYASHI Yasuhiro

IEEJ Transactions on Power and Energy 130 ( 11 ) 928 - 931 2010.11

　View Summary

In tandem with the penetration of Renewable Energy Sources (RES) such as photovoltaic and wind power generation to reduce CO2 emissions and conserve energy, development of advanced smart grid technologies is needed to secure a stable power supply of grid with RES by controlling power quality (voltage and frequency) within each secure range. This paper describes Japanese trend of the advanced smart grid technologies to harmonize RES and conventional bulk power system. Furthermore, several ongoing field tests to try to realize Japanese version of smart grid are briefly introduced.
A Study on Determination of Connection Areas of PVs for Centralized Control

NAGATA Kouichi, HANAI Yuji, MATSUKI Junya, HAYASHI Yasuhiro

2010 ( 148 ) 55 - 60 2010.09
Outputs Dispatch of Generators aiming Transmission Congestion Management at the Point of Frequency Fluctuation Caused by Renewable Energy

SUZUKI Hiroaki, HAYASHI Yasuhiro, KOSHIMIZU Gentaro

2010 ( 125 ) 19 - 22 2010.09
Dynamic Load Model using PSO-Based Parameter Estimation

TAOKA Hisao, MATSUKI Junya, TOMODA Michiya, HAYASHI Yasuhiro, KANAO Norikazu, YAMAGISHI Yoshio

2010 ( 109 ) 91 - 96 2010.09
Improvement of Voltage Imbalance and Restraint of Harmonics in Distribution System by PCS

KAWASAKI Shoji, MATSUKI Junya, TANAKA Motohiro, HAYASHI Yasuhiro

2010 ( 76 ) 155 - 160 2010.09
Evaluation of a Load Management Method for a Distribution System using Smart Houses

YOSHIMURA Kazuaki, HANAI Yuji, MATSUKI Junya, HAYASHI Yasuhiro

2010 ( 76 ) 149 - 154 2010.09
Research about Compensation of PV Output Fluctuation Using Cooperative Control of PV Systems and multiple GEs

HOSHINA Shunichiro, HAYASHI Yasuhiro

2010 ( 76 ) 139 - 142 2010.09
Optimal Allocation of plural SVCs based on introduction of mass PV

KONISHI Keisuke, HAYASHI Yasuhiro

2010 ( 76 ) 25 - 28 2010.09
Study on Reactive Power Control by Using Fuel Cells to Improve Voltage Rise and Voltage Imbalance under High Penetration of Photovoltaic Generations

SANO Masahiro, HANAI Yuji, HAYASHI Yasuhiro, SHINJI Takao, TSUJITA Shinsuke

2010 ( 76 ) 19 - 23 2010.09
Cooperative Voltage Control Method by LRT and Power Factor Control of PV Systems

KANEMOTO Noriaki, KAWASAKI Shoji, MATSUKI Junya, HAYASHI Yasuhiro

2010 ( 76 ) 7 - 12 2010.09
Central Voltage Control Method by LRT and SVR Based on Voltage Estimation Using Measurement Data from IT Switches in Multiple Feeders

TAKAHASHI Shuhei, HAYASHI Yasuhiro

2010 ( 45 ) 139 - 143 2010.09
A Study of the Optimal Configuration of Distribution Network with Distributed Generators

TAKANO Hirotaka, SUGAYA Shuhei, HAYASHI Yasuhiro, MATUSKI Junya, MAKI Yukino

2010 ( 45 ) 83 - 88 2010.09
A Study on Determination of Connection Areas of PVs for Centralized Control

NAGATA Kouichi, HANAI Yuji, MATSUKI Junya, HAYASHI Yasuhiro

2010 ( 149 ) 55 - 60 2010.09
Outputs Dispatch of Generators aiming Transmission Congestion Management at the Point of Frequency Fluctuation Caused by Renewable Energy

SUZUKI Hiroaki, HAYASHI Yasuhiro, KOSHIMIZU Gentaro

2010 ( 126 ) 19 - 22 2010.09
Dynamic Load Model using PSO-Based Parameter Estimation

TAOKA Hisao, MATSUKI Junya, TOMODA Michiya, HAYASHI Yasuhiro, KANAO Norikazu, YAMAGISHI Yoshio

2010 ( 110 ) 91 - 96 2010.09
Improvement of Voltage Imbalance and Restraint of Harmonics in Distribution System by PCS

KAWASAKI Shoji, MATSUKI Junya, TANAKA Motohiro, HAYASHI Yasuhiro

2010 ( 77 ) 155 - 160 2010.09
Evaluation of a Load Management Method for a Distribution System using Smart Houses

YOSHIMURA Kazuaki, HANAI Yuji, MATSUKI Junya, HAYASHI Yasuhiro

2010 ( 77 ) 149 - 154 2010.09
Research about Compensation of PV Output Fluctuation Using Cooperative Control of PV Systems and multiple GEs

HOSHINA Shunichiro, HAYASHI Yasuhiro

2010 ( 77 ) 139 - 142 2010.09
Evaluation of Stabilizing Control by Cooperation of Binary Control and Electrical Charge and Discharge Control Using Storage Battery in PV Systems

MURAHASHI Keisuke, HAYASHI Yasuhiro, HAYASHI Takanori, OKUNO Yoshimichi, FUNABASHI Toshihisa

2010 ( 77 ) 133 - 137 2010.09
Evaluation of setting value of operating parameter of voltage increase suppression to maximize output suppression avoidance for clustered residential grid-interconnected photovoltaic power systems

MIYAMOTO Yusuke, HAYASHI Yasuhiro

2010 ( 77 ) 123 - 131 2010.09
Optimal Allocation of plural SVCs based on introduction of mass PV

KONISHI Keisuke, HAYASHI Yasuhiro

2010 ( 77 ) 25 - 28 2010.09
Study on Reactive Power Control by Using Fuel Cells to Improve Voltage Rise and Voltage Imbalance under High Penetration of Photovoltaic Generations

SANO Masahiro, HANAI Yuji, HAYASHI Yasuhiro, SHINJI Takao, TSUJITA Shinsuke

2010 ( 77 ) 19 - 23 2010.09
Cooperative Voltage Control Method by LRT and Power Factor Control of PV Systems

KANEMOTO Noriaki, KAWASAKI Shoji, MATSUKI Junya, HAYASHI Yasuhiro

2010 ( 77 ) 7 - 12 2010.09
Impact Assessment of Single-phase PV Penetration on Power Quality of Distribution System

HANAI Yuji, MATSUKI Junya, SANO Masahiro, HAYASHI Yasuhiro

2010 ( 77 ) 1 - 6 2010.09
Fault Locator Using Measured Impedance Calculated by Voltage and Current at Incoming Feeder of Distributed Generation System

IIOKA Daisuke, HAYASHI Yasuhiro

2010 ( 53 ) 1 - 6 2010.09
Minimization Method of Voltage Deviation Region in Distribution System with PV Systems during Bank Fault Restoration

YOSHIZAWA Shinya, HAYASHI Yasuhiro, MORI Kenjiro, KAMIYA Eiji

2010 ( 46 ) 145 - 149 2010.09
A Study of the Optimal Configuration of Distribution Network with Distributed Generators

TAKANO Hirotaka, SUGAYA Shuhei, HAYASHI Yasuhiro, MATUSKI Junya, MAKI Yukino

2010 ( 46 ) 83 - 88 2010.09
Minimization Method of Voltage Deviation Region in Distribution System with PV Systems during Bank Fault Restoration

YOSHIZAWA Shinya, HAYASHI Yasuhiro, MORI Kenjiro, KAMIYA Eiji

2010 ( 45 ) 145 - 149 2010.09
Impact Assessment Single-phase PV Penetration on Power Quality of Distribution System

HANAI Yuji, MATSUKI Junya, SANO Masahiro, HAYASHI Yasuhiro

2010 ( 76 ) 1 - 6 2010.09
Fault Locator Using Measured Impedance Calculated by Voltage and Current at Incoming Feeder of Distributed Generation System

IIOKA Daisuke, HAYASHI Yasuhiro

2010 ( 52 ) 1 - 6 2010.09
Voltage control using SVCs with controllable dead band in distribution system connected with many PVs

TAKAHASHI Naoyuki, HAYASHI Yasuhiro, MORI Kenjiro

2010 ( 45 ) 151 - 156 2010.09
Central Voltage Control Method by LRT and SVR Based on Voltage Estimation Using Measurement Data from IT Switches in Multiple Feeders

TAKAHASHI Shuhei, HAYASHI Yasuhiro

2010 ( 46 ) 139 - 143 2010.09
Evaluation of Stabilizing Control by Cooperation of Binary Control and Electrical Charge and Discharge Control Using Storage Battery in PV Systems

MURAHASHI Keisuke, HAYASHI Yasuhiro, HAYASHI Takanori, OKUNO Yoshimichi, FUNABASHI Toshihisa

2010 ( 76 ) 133 - 137 2010.09
Evaluation of setting value of operating parameter of voltage increase suppression to maximize output suppression avoidance for clustered residential grid-interconnected photovoltaic power systems

MIYAMOTO Yusuke, HAYASHI Yasuhiro

2010 ( 76 ) 123 - 131 2010.09
A Fault Location Method Using Air-Gap Fluxes of Synchronous Generator

Junya Matsuki, Yasuhiro Hayashi, Toshikazu Nakano, Yoichi Funasaki

ELECTRICAL ENGINEERING IN JAPAN 167 ( 3 ) 20 - 27 2009.05 [Refereed]

　View Summary

This paper deals with an experimental investigation of a novel fault location method using air-gap flux distributions of a synchronous generator connected to a power system. Air-gap fluxes are the sum of field fluxes and armature reaction fluxes. Changes in armature current and In field current at a fault contribute directly to the armature reaction fluxes and field fluxes, then resultant air-gap fluxes. Therefore, air-gap fluxes can be utilized to locate a fault. Wavelet analysis is applied to the induced voltages of search coils, which are wound around a stator tooth top for measurement of the air-gap flux. It is shown that the fault type and location can be estimated based oil the change in the search coil voltages measured during the fault. (C) 2009 Wiley Periodicals, Inc. Electr Eng Jpn, 167(3): 20-27, 2009; Published online in Wiley InterScicrice (www. interscience.wiley.com). DOI 10.1002/eej.20707

DOI
Active coordinated operation of a distribution network system for many connections of distributed generators

Yasuhiro Hayashi, Shoji Kawasaki, Junya Matsuki, Shinji Wakao, Junpei Baba, Masahide Hojo, Akihiko Yokoyama, Naoki Kobayashi, Takao Hirai, Kohei Oishi

Electrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi) 167 46 - 57 2009.05

　View Summary

Recently, the total number of distributed generators (DGs) such as photovoltaic generation system and wind turbine generation system connected to an actual distribution network has increased drastically. The distribution network connected to many distributed generators must be operated keeping reliability of power supply, power quality, and loss minimization. In order to accomplish active distribution network operation to take advantage of many connections of DGs, a new coordinated operation of distribution system with many connections of DGs is necessary. In this paper, the authors propose a coordinated operation of distribution network system connected to many DGs by using newly proposed sectionalizing switch control, sending voltage control, and computation of available DG connection capability. In order to check the validity of the proposed coordinated operation of distribution system, numerical simulations using the proposed coordinated distribution system operation are carried out in a practical distribution network model. © 2009 Wiley Periodicals, Inc.

DOI
Determination of Loss-Minimum Configuration with Mathematical Optimality in a Three-Sectionalized Three Connected Distribution Feeder Network

Yasuhiro Hayashi, Junya Matsuki, Shinji Ishikawa, Hirotaka Takano, Eiji Muto, Naoki Kobayashi

ELECTRICAL ENGINEERING IN JAPAN 167 ( 1 ) 56 - 65 2009.04 [Refereed]

　View Summary

In a distribution system, in order to enhance the reliability of power supply, the distribution feeder is divided into several sections by installing sectionalizing switches, and then each of the sectionalized sections is connected to a different feeder. For example, one feeder is divided into three sections by two sectionalizing switches, and then each of the divided sections is connected to the other feeder through sectionalizing switch. Since a distribution system with many feeders has many sectionalizing switches, the system configuration is determined by states (opened or closed) of sectionalizing switches. Usually, a power utility tries to obtain distribution loss-minimum configuration among large numbers of configuration candidates. However, it is very difficult to determine the loss-minimum configuration such that the mathematical optimality is guaranteed, because it is well known that determination of a distribution system's configuration is to decide whether each sectionalizing switch is opened or closed by solving a combinatorial optimization problem.
In this paper, the authors propose a determination method of loss-minimum configuration by which the mathematical optimality is guaranteed for a three-sectionalized three-connected distribution feeder network. A problem to determine the loss-minimum configuration is formulated as a combinatorial optimization problems with four operational constraints ((1)) feeder capacity, (2) voltage limit, (3) radial structure, and (4) three-sectionalization). In the proposed method, after picking up all partial configurations satisfied with radial structure constraint by using enumeration method, optimal combination of partial configurations is determined under the other operational constraints by using conventional optimization method. Numerical simulations are carried out for a distribution network model with 140 sectionalizing switches in order to examine the validity of the proposed algorithm in comparison with one of conventional meta-heuristics (tabu search). (c) 2009 Wiley Periodicals, Inc. Electr Eng Jpn, 167(1): 56-65, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.20530

DOI
Analysis of Even Harmonics Generation in an Isolated Electric Power System

Norikazu Kanao, Yasuhiro Hayashi, Junya Matsuki

ELECTRICAL ENGINEERING IN JAPAN 167 ( 2 ) 56 - 63 2009.04 [Refereed]

　View Summary

Harmonics bred from loads are mainly odd order because the current waveforms have half-wave symmetry. Since the even harmonics are negligibly small, they generally are not measured in electric power systems. However, even harmonics were measured at a 500/275/154 kV substation in Hokuriku Electric Power Company after a transmission line fault was corrected. The even harmonics caused malfunctions of protective digital relays because the relays used 4th harmonics at the input filter as the automatic supervisory signal.
This paper describes mechanisms of generation of the even harmonics by comparing the measured waveforms with the ATP-EMTP simulation results. Analysis of these results has clearly shown that there are three different mechanisms of generation of even harmonics. The first mechanism is the appearance of a magnetizing current in transformers due to flux deviation by the DC component of the fault current. The second mechanism is harmonic conversion of a Synchronous machine which generates even harmonics when the DC component or the even harmonic current flow into the machine. The third mechanism is an increase of harmonic impedance due to an isolated power system, thus producing the harmonic voltages. The design of the input filter of protective digital relays should take into account even harmonics generation in an isolated power system. (C) 2009 Wiley Periodicals, Inc. Electr Eng Jpn, 167(2): 56-63, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.20592

DOI
Computation of Locational and Hourly Maximum Output of a Distributed Generator Connected to a Distribution Feeder

Yasuhiro Hayashi, Junya Matsuki, Yuji Hanai, Shinpei Hosokawa, Naoki Kobayashi

ELECTRICAL ENGINEERING IN JAPAN 167 ( 2 ) 38 - 47 2009.04 [Refereed]

　View Summary

Recently, the total number of distributed generation such as photovoltaic generation systems and wind turbine generation systems connected to a distribution network has drastically increased. Distributed generation using renewable energy can reduce the distribution loss and emission of CO,. However, the distribution network with file distributed generators must be operated while maintaining the reliability of the power supply and power quality. In this paper, the authors propose a computational method to determine the maximum output of a distributed generator under operational constraints [(1) voltage limit, (2) line current capacity, and (3) no reverse flow to bank] at arbitrary connection points and hourly periods. In the proposed method, a three-phase iterative load flow calculation is applied to evaluate the above operational constraints. The three-phase iterative load flow calculation has two simple procedures: (Procedure 1) addition of load currents from the terminal node of the feeder to root one, and (Procedure 2) subtraction of Voltage drop From the root node of the feeder to terminal one. In order to check the validity of the proposed method, numerical simulations are performed I or a distribution system model. Furthermore, the characteristics of locational and hourly maximum output of a distributed generator connected to a distribution feeder are analyzed using several numerical examples. (C) 2009 Wiley Periodicals, Inc. Electr Eng Jpn, 167(2): 38-47, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.20610

DOI
Determination Method for Loss Minimum Configuration Considering Reconnection of Distributed Generators (Wiley)

H. Takano, T. Tomida, Y. Hayashi, J. Matsuki

IEEJ Transaction on Power and Energy 129 ( 2 ) 824 - 830 2009.02 [Refereed]

DOI
Multi-objective Optimization Method for Distribution System Configuration using Pareto Optimal Solution (Wiley)

Y. Hayashi, H. Takano, J. Matsuki, Y. Nishikawa

IEEJ Transaction on Power and Energy 128 ( 10 ) 1208 - 1216 2008.10 [Refereed]

DOI
Determination of the optimal control parameters of voltage regulators installed in a radial distribution network

Yasuhiro Hayashi, Yuji Hanai, Junya Matsuki, Yoshiaki Fuwa, Kenjiro Mori

IEEJ TRANSACTIONS ON ELECTRICAL AND ELECTRONIC ENGINEERING 3 ( 5 ) 515 - 523 2008.09 [Refereed]

　View Summary

This paper presents a new computation method to determine simultaneously file optimal parameters of several voltage regulators such as load-ratio control transformer (LRT) and step voltage regulator (SVR) installed in a radial distribution network. The proposed method determines a combination of their control parameters by minimizing the weighted sum of deviations of line voltage from the upper and lower voltage limits and the amounts of voltage violations by referring to the stored data measured by IT switches. which are sectionalizing switches with sensors installed in the distribution feeder. The optimization algorithm is based on particle swarm optimization (PSO). which is one of the nonlinear optimization methods, by using the concept of swarm intelligence. In order to confirm the validity of the proposed method, numerical simulations are carried out oil a distribution network model. (c) 2008 Institute of Electrical Engineers of Japan. Published John by Wiley & Sons. Inc.

DOI
Service Restoration Method Considering Simultaneous Disconnection of Distributed Generators by One-Bank Fault of Distribution System

Hirotaka Takano, Yasuhiro Hayashi, Junya Matsuki, Naoki Kobayashi

ELECTRONICS AND COMMUNICATIONS IN JAPAN 91 ( 8 ) 44 - 55 2008.08 [Refereed]

　View Summary

Distributed generators (DGs) such as fuel cells and solar cells are going to be installed in the demand side of distribution systems. The DGs can reduce distribution loss by appropriate allocation. However, there are several problems installing DGs such as service restoration of distribution system with DGs and so on. When one bank fault of distribution substation occurs in distribution system, since DGs are simultaneously disconnected from the system, it is not easy to restore isolated load by one bank switching in distribution substation. Therefore, a service restoration method to determine restoration configuration and restoration procedures (switching procedure from normal configuration to restoration configuration) taking into account simultaneous disconnection of DGs is needed. In this paper, the authors propose a computation method to determine the optimal restoration configuration and the restoration procedure considering simultaneous disconnection of DGs by one bank fault of distribution system. In the proposed algorithm, after all of the restoration configuration candidates are effectively enumerated under the operational constraints, the optimal configuration to restore the isolated load is selected among enumerated configuration candidates. After determining the optimal restoration configuration, the optimal restoration procedures are obtained by greedy algorithm. Numerical simulations are carried out for a real scale system model with 237 sectionalizing switches (configuration candidates are 2(237)) and 21 DGs (total Output is 5250 kW which is 3% of total load) in order to examine the validity of the proposed algorithm. (C) 2008 Wiley Periodicals, Inc. Electron Comm Jpn, 91(8): 44-55, 2008; Published online in Wiley InterScience (www.interscience. wiley.com). DOI 10.1002/ecj.10133

DOI
Estimation of load model parameters for harmonic analysis

Yasuhiro Hayashi, Junya Matsuki, Kenichi Kobayashi, Norikazu Kanao

ELECTRICAL ENGINEERING IN JAPAN 164 ( 2 ) 44 - 53 2008.07 [Refereed]

　View Summary

In order to devise countermeasures for harmonic disturbances and harmonic suppression in power systems effectively, it is necessary to develop a harmonic analysis approach with high accuracy. The major harmonic analysis approach is to re-create harmonic distribution in a power system model by using a simulation method. However, in order to carry out high-accuracy estimation of the harmonic distribution using the simulation method, after creating a load model which consists of several parameters associated with the measured harmonic impedance, the optimal load model parameters must be determined. So far, appropriate load model parameters have been determined by trial and error. Therefore, a systematic approach to determine the optimal load model parameters is needed to estimate the measured harmonic impedance with high accuracy.
In this paper, a determination method for the optimal load model parameters to estimate the measured harmonic impedance is proposed. The proposed method is based on Particle Swarm Optimization (PSO), which is one of the optimization methods using the concept of swarm intelligence. In order to check the validity of the proposed method, the load model parameters estimated by the proposed method are evaluated using test data and field data of Hokuriku Electric Power Co. (c) 2008 Wiley Periodicals, Inc.

DOI
Service restoration method considering simultaneous disconnection of distributed generators by one-bank fault of distribution system

Hirotaka Takano, Yasuhiro Hayashi, Junya Matsuki, Naoki Kobayashi

Electronics and Communications in Japan, Part II: Electronics (English translation of Denshi Tsushin Gakkai Ronbunshi) 91 ( 8 ) 44 - 55 2008 [Refereed]

　View Summary

Distributed generators (DGs) such as fuel cells and solar cells are going to be installed in the demand side of distribution systems. The DGs can reduce distribution loss by appropriate allocation. However, there are several problems installing DGs such as service restoration of distribution system with DGs and so on. When one bank fault of distribution substation occurs in distribution system, since DGs are simultaneously disconnected from the system, it is not easy to restore isolated load by one bank switching in distribution substation. Therefore, a service restoration method to determine restoration configuration and restoration procedures (switching procedure from normal configuration to restoration configuration) taking into account simultaneous disconnection of DGs is needed. In this paper, the authors propose a computation method to determine the optimal restoration configuration and the restoration procedure considering simultaneous disconnection of DGs by one bank fault of distribution system. In the proposed algorithm, after all of the restoration configuration candidates are effectively enumerated under the operational constraints, the optimal configuration to restore the isolated load is selected among enumerated configuration candidates. After determining the optimal restoration configuration, the optimal restoration procedures are obtained by greedy algorithm. Numerical simulations are carried out for a real scale system model with 237 sectionalizing switches (configuration candidates are 2237) and 21 DGs (total output is 5250 kW which is 3% of total load) in order to examine the validity of the proposed algorithm. © 2008 Wiley Periodicals, Inc.

DOI
Determination of optimal sending voltage profile in distribution systems with distributed generators

Yasuhiro Hayashi, Junya Matsuki, Ryoji Suzuki, Eiji Muto

ELECTRICAL ENGINEERING IN JAPAN 161 ( 2 ) 16 - 24 2007.11 [Refereed]

　View Summary

Sending voltage profile of distribution feeder is controlled by changing a tap of distribution transformer. In a distribution network with distributed generators, for reasons of effect of reversed flows from them and existence of a great number of sending voltage profile candidates, it is not easy to control sending voltage profile within the acceptable voltage limit. In this paper, in order to determine the optical sending voltage profile of distribution transformer in a distribution network with distributed generators, the authors propose a new method to determine the optimal sending voltage profile so as to minimize the total number of tap position's change per day under constraints of acceptable voltage limit. In the proposed method, after calculating acceptable range of three-phase voltage of distribution feeder, the optimal profile of tap position within the calculated acceptable voltage range is determined among these candidates by using reduced ordered binary decision diagram (ROBDD) which is an efficient enumeration algorithm. In order to check the validity of the proposed method, numerical simulations are carried out for a distribution network model with a distributed generator. (c) 2007 Wiley Periodicals, Inc.

DOI
A Simple Evaluation Method for Annual CO2 Emissions Reduced by Distribution Loss Minimization

Y. Hayashi, H. Takano, J. Matsuki, M. Yokoyama

IEEJ Transaction on Power and Energy 127 ( 11 ) 1137 - 1144 2007.11 [Refereed]

DOI
Establishment of a Standard Analytical Model of Distribution Network with Distributed Generators and Development of Multi Evaluation Method for Network Configuration Candidates

Yasuhiro Hayashi, Shoji Kawasaki, Junya Matsuki, Hiroaki Matsuda, Shigekazu Sakai, Teru Miyazaki, Naoki Kobayashi

IEEJ Transactions on Power and Energy 126 ( 10 ) 1013 - 1022 2006.10 [Refereed]

　View Summary

Since a distribution network has many sectionalizing switches, there are huge radial network configuration candidates by states (opened or closed) of sectionalizing switches. Recently, the total number of distributed generation such as photovoltaic generation system and wind turbine generation system connected to the distribution network is drastically increased. The distribution network with the distributed generators must be operated keeping reliability of power supply and power quality. Therefore, the many configurations of the distribution network with the distributed generators must be evaluated multiply from various viewpoints such as distribution loss, total harmonic distortion, voltage imbalance and so on. In this paper, the authors propose a multi evaluation method to evaluate the distribution network configuration candidates satisfied with constraints of voltage and line current limit from three viewpoints ((1) distribution loss, (2) total harmonic distortion and (3) voltage imbalance). After establishing a standard analytical model of three sectionalized and three connected distribution network configuration with distributed generators based on the practical data, the multi evaluation for the established model is carried out by using the proposed method based on EMTP (Electro-Magnetic Transients Programs).
Computation of Locational and Hourly Maximum Output of a Distributed Generator Connected to a Distribution Feeder

Yasuhiro Hayashi, Junya Matsuki, Yuji Hanai, Shinpei Hosokawa, Naoki Kobayashi

電気学会論文誌B 126 ( 10 ) 1023 - 1031 2006.10 [Refereed]

　View Summary

Recently, the total number of distributed generation such as photovoltaic generation system and wind turbine generation system connected to distribution network is drastically increased. Distributed generation utilizing renewable energy can reduce the distribution loss and emission of CO2. However the distribution network with the distributed generators must be operated keeping reliability of power supply and power quality. In this paper, the authors propose a computation method to determine the maximum output of a distributed generator under the operational constrains ((1) voltage limit, (2) line current capacity, and (3) no reverse flow to bank) at arbitrary connection point and hourly period. In the proposed method, three-phase iterative load flow calculation is applied to evaluate the above operational constraints. Three-phase iterative load flow calculation has two simple procedures: (Procedure1) addition of load currents from terminal node of feeder to root one, and (Procedure2) subtraction of voltage drop from root node of feeder to terminal one. In order to check the validity of the proposed method, numerical simulations are accomplished for a distribution system model. Furthermore, characteristics of locational and hourly maximum output of distributed generator connected to distribution feeder are analyzed by several numerical examples.
Determination Method of Loss-minimum Configuration with Mathematical Optimality in a Three Sectionalized and Three Connected Distribution Feeder Network

Yasuhiro Hayashi, Junya Matsuki, Shinji Ishikawa, Hirotaka Takano, Eiji Muto, Naoki Kobayashi

IEEJ Transactions on Power and Energy 126 ( 5 ) 516 - 524 2006.05

　View Summary

In a distribution system, in order to enhance the reliability of power supply, the distribution feeder is divided into several sections by installing sectionalizing switches, and then each of sectionalized sections is connected to different feeder. For example, one feeder is divided into three sections by two sectionalizing switches, and then each of divided sections is connected to other feeder through sectionalizing switch. Since a distribution system with many feeders has many sectionalizing switches, the system configuration is determined by states (opened or closed) of sectionalizing switches. Usually, power utility tries to obtain distribution loss-minimum configuration among large numbers of configuration candidates. However, it is very difficult to determine the loss-minimum configuration that the mathematical optimality is guaranteed, because it is well known that determination of distribution system's configuration is to decide whether each sectionalizing switch is opened or closed by solving a combinatorial optimization problem.
In this paper, the authors propose a determination method of loss minimum configuration which the mathematical optimality is guaranteed for a three sectionalized and three connected distribution feeder network. A problem to determine the loss minimum configuration is formulated as a combinatorial optimization problems with four operational constraints ((1) feeder capacity, (2) voltage limit, (3) radial structure and (4) three sectionalization). In the proposed method, after picking up all partial configurations satisfied with radial structure constraint by using enumeration method, optimal combination of partial configurations is determined under the other operational constraints by using conventional optimization method. Numerical simulations are carried out for a distribution network model with 140 sectionalizing switches in order to examine the validity of the proposed algorithm in comparison with one of conventional meta-heuristics (Tabu search).
Application of improved PSO to power flow control by TCSC for maximum acceptance of requested wheeled power

Y Hayashi, J Matsuki, G Kanai

ELECTRICAL ENGINEERING IN JAPAN 155 ( 2 ) 17 - 26 2006.04 [Refereed]

　View Summary

Open access to electric power transmission networks has been carried out in order to foster generation competition and customer choice worldwide. When several PPSs request to simultaneously supply power to customers based oil bilateral contracts, it is expected that the transmission network accepts amounts of wheeled power requested by the PPSs as much as possible. It is possible to maximize total requested wheeled power by controlling power flow through transmission lines. It is well known that FACTS device is available to control line flow flexibly. In this paper, in order to maximize total wheeled power simultaneously requested by several PPSs, the authors propose an algorithm to determine the optimal reactance of TCSC (a type of FACTS device). The proposed algorithm is based on Particle Swarm Optimization (PSO), which is an optimization method based on swarm intelligence. In the proposed algorithm, PSO is improved to enhance ability of searching global minimum by giving different characteristic to behavior of each agent. In order to check the validity of the proposed method, numerical results are shown for 6 and IEEE 30 bus system models. (c) 2006 Wiley Periodicals, Inc.

DOI
Service Restoration Method Considering Simultaneous Disconnection of Distributed Generators by One Bank Fault of Distribution System

Hirotaka Takano, Yasuhiro Hayashi, Junya Matsuki, Naoki Kobayashi

IEEJ Transactions on Power and Energy 126 ( 3 ) 336 - 346 2006.03 [Refereed]

　View Summary

Distributed generators (DGs) such as fuel cells and solar cells etc. are going to be installed in demand side of distribution systems. The distributed generators can reduce distribution loss by appropriate allocation. However, there are several problems to install DGs such as service restoration of distribution system with DGs and so on. When one bank fault of distribution substation occurs in distribution system, since DGs are simultaneously disconnected from the system, it is not easy to restore isolated load by one bank switching in distribution substation. Therefore, a service restoration method to determine restoration configuration and restoration procedures (switching procedure from normal configuration to restoration configuration) taking into account simultaneous disconnection of DGs is needed. In this paper, the authors propose a computation method to determine the optimal restoration configuration and the restoration procedure considering simultaneous disconnection of DGs by one bank fault of distribution system. In the proposed algorithm, after all of restoration configuration candidates are effectively enumerated under the operational constraints, the optimal configuration to restore the isolated load is selected among enumerated configuration candidates. After determining the optimal restoration configuration, the optimal restoration procedures are obtained by greedy algorithm. Numerical simulations are carried out for a real scale system model with 237 sectionalizing switches (configuration candidates are 2237) and 21DGs (total output is 5250kW which is 3% of total load) in order to examine the validity of the proposed algorithm.
Analysis of even harmonics generation in an isolated electric power system

Norikazu Kanao, Yasuhiro Hayashi, Junya Matsuki

IEEJ Transactions on Power and Energy 126 ( 9 ) 887 - 893 2006 [Refereed]

　View Summary

Harmonics bred from loads are mainly odd order because the current waveform has half-wave symmetry. Since the even harmonics are negligibly small, those are not generally measured in electric power systems. However, even harmonics were measured at a 500/275/154 kV substation in Hokuriku Electric Power Company after removal of a transmission line fault. The even harmonics caused malfunctions of protective digital relays because the relays used 4 th harmonics at the input filter as automatic supervisory signal. This paper describes the mechanism of generation of the even harmonics by comparing measured waveforms with ATP-EMTP simulation results. As a result of analysis, it is cleared that even harmonics are generated by three causes. The first cause is a magnetizing current of transformers due to flux deviation by DC component of a fault current. The second one is due to harmonic conversion of a synchronous machine which generates even harmonics when direct current component or even harmonic current flow into the machine. The third one is that increase of harmonic impedance due to an isolated power system produces harmonic voltages. The design of the input filter of protective digital relays should consider even harmonics generation in an isolated power system.

DOI
The new technology of power system operation under competitive environment

大山力, 岡田健司, 高橋理, 石亀篤司, 加藤政一, 北裕幸, 栗原郁夫, 斎藤浩海, 佐々木伸幸, 沢敏之, 柴田信之, 進士誉夫, 高橋順一, 但見収司, 塚本幸辰, 寺島一希, 中沢太郎, 野村宗訓, 林秀樹, 林泰弘, 藤本明夫, 松川勇, 三沢哲也, 三島裕樹, 宮内肇, 諸住哲, 矢野信彦, 横山明彦, 余利野直人, 佐藤泰司, 佐々木鉄於, 吉田誠治, 伊佐治圭介, 内田貢市, 柏木健志, 川内野寿博, 北岸延之, 小杉成史, 佐藤康生, 杉原俊雄

電気学会技術報告 ( 1038 ) 156P 2005.11

J-GLOBAL
Determination Method for Optimal Sending Voltage Profile in Distribution System with Distributed Generators

Yasuhiro Hayashi, Junya Matsuki, Ryoji Suzuki, Eiji Muto

IEEJ Transactions on Power and Energy 125 ( 9 ) 846 - 854 2005.09 [Refereed]

　View Summary

Sending voltage profile of distribution feeder is controlled by changing a tap of distribution transformer. In a distribution network with distributed generators, for reasons of effect of reversed flows from them and existence of a great number of sending voltage profile candidates, it is not easy to control sending voltage profile within the acceptable voltage limit. In this paper, in order to determine the optimal sending voltage profile of distribution transformer in a distribution network with distributed generators, the authors propose a new method to determine the optimal sending voltage profile so as to minimize total number of tap position's change per day under constraints of acceptable voltage limit. In the proposed method, after calculating acceptable range of three phase voltage of distribution feeder, the optimal profile of tap position within the calculated acceptable voltage range is determined among these candidates by using reduced ordered binary decision diagram (ROBDD) which is an efficient enumeration algorithm. In order to check the validity of the proposed method, numerical simulations are carried out for a distribution network model with a distributed generator.
Calculation of the loss-minimum configuration in the IEEJ local power system model

Y Hayashi, J Matsuki, Kurihara, I

ELECTRICAL ENGINEERING IN JAPAN 146 ( 4 ) 34 - 42 2004.03 [Refereed]

　View Summary

in Japan, local power systems (77 kV) are served from the 275- or 154-kV substations. For enhancement of power supply reliability, the transmission lines are connected to several substations, and the operational configuration is radial. The local power system's configuration is determined by connecting and disconnecting transmission lines so as to keep the radial structure and satisfy the operation constraints. When a local power system has a number of transmission lines, many configuration candidates occur. Recently, an IEEJ committee made a practical scale local system model (IEEJ Local System Model). Since the IEEJ Local System Model has 76 transmission lines, the total number of configuration candidates is 2(76) (approximately 7.5 x 10(22)). In this paper, the authors try to strictly obtain the loss-minimum configuration under constraints such as substation capacity, line capacity, and radial structure in the IEEJ Local System Model. In order to obtain the optimal configuration, a new computation algorithm is proposed. In the proposed algorithm, the configuration determination problem is replaced as two combinatorial optimization problems based on the operational constraints [(1) substation capacity, (2) line capacity, and (3) radial structure]. One combinatorial optimization problem (subproblem 1) is to pick up all partial configurations so as to minimize total line loss under the substation capacity constraint. By using the enumeration method, subproblem 1 is solved. Subproblem 2 is solved by using the reduced ordered binary decision diagram (ROBDD). Since the proposed method is based on enumeration and Boolean function, the optimality of obtained solution is guaranteed. (C) 2004 Wiley Periodicals, Inc.
Application of Improved PSO to Power Flow Control by TCSC for Maximum Acceptance of Requested Wheeled Power

Yasuhiro Hayashi, Junya Matsuki, Genshin Kanai

IEEJ Transactions on Power and Energy 123 ( 10 ) 1133 - 1141 2003.10 [Refereed]

　View Summary

Open access to electric power transmission networks has been carried out in order to foster generation competition and customer choice in the worldwide. When several PPSs request to simultaneously supply power to customers based on bilateral contracts, it is expected that transmission network accepts amounts of wheeled power requested by the PPSs as much as possible. It is possible to maximize total requested wheeled power by controlling power flow through transmission lines. It is well known that FACTS device is available to control line flow flexibly. In this paper, in order to maximize total wheeled power simultaneously requested by several PPSs, the authors propose an algorithm to determine the optimal reactance of TCSC (one of FACTS devices). The proposed algorithm is based on Particle Swarm Optimization (PSO), which is one of optimization methods based on swarm intelligence. In the proposed algorithm, PSO is improved to enhance ability of searching global minimum by giving different characteristic to behavior of each agent. In order to check the validity of the proposed method, numerical results are shown for 6 and IEEE 30 bus system models.
Multi Objective Evaluation for Local Power System Configuration Based on Deterministic and Probabilistic Approaches

Yasuhiro Hayashi, Junya Matsuki, Kazuhisa Sato, Yuko Tokunoh

IEEJ Transactions on Power and Energy 123 ( 10 ) 1172 - 1179 2003.10 [Refereed]

　View Summary

Local power systems (66kV) are served from the 275kV or 154kV substations. In order to maintain power supply reliability, the transmission lines are connected to several substations, and the operational configuration is radial. Since practical local power system has a number of transmission lines, many configuration candidates occur. It is expected to effectively evaluate these configuration candidates from various viewpoints such as reliability of power supply, transmission loss and so on. In this paper, the authors propose a multi objective evaluation method by using deterministic and probabilistic approaches for local power system configuration. In the proposed multi objective evaluation method, after selecting system configuration candidates which satisfy N-1 security by using an optimization method based on Boolean function, these candidates are evaluated from viewpoints of expected outage time, transmission loss and facility operation rate. In order to check the validity of the proposed method, numerical results are shown for a practical local system model with about 39 × 1027 configuration.
Determination of optimal system configuration in Japanese secondary power systems

Y Hayashi, J Matsuki

IEEE TRANSACTIONS ON POWER SYSTEMS 18 ( 1 ) 394 - 399 2003.02 [Refereed]

　View Summary

In Japan, when a secondary radial power system (66 kV, 77 kV) has a number of connected feeders whose circuit breakers (CBs) can be opened or closed, the combinatorial number of possible system structures created by switching CBs becomes very large. In order to determine the optimal configuration of secondary radial power system in normal state and fault state, a new computation algorithm is proposed. The proposed algorithm is based on enumeration and Reduced Ordered Binary Decision Diagram (ROBDD). In order to verify the availability of the proposed approach, the authors obtain optimal configurations for normal and fault states on IEE of Japan secondary power system model (IEEJ model) by using the proposed method. IEEJ model has the distinctive characteristics of practical Japanese power systems, the total number of configuration candidates is the 76th power of 2 (= 75 000 000 000 000 billion approximately). The optimality of the system configuration obtained by the proposed method is mathematically guaranteed.

DOI
Determination Method for Loss-minimum Distribution System Configuration Considering Disconnection of Installed Dispersed Generators

Yasuhiro Hayashi, Junya Matsuki, Hirotaka Takano

IEEJ Transactions on Power and Energy 122 ( 12 ) 1376 - 1383 2002.12

　View Summary

Dispersed generators (DGs) such as fuel cells and solar cells etc. are going to be installed in demand side of power systems. The dispersed facilities can reduce distribution system loss by the appropriate allocation. However, when a DG which has large capacity is disconnected from the distribution network by a fault, violation of the operational constraints such as the line capacity and voltage drop may occur. From a view point of system reliability, robust system configuration for suddenly disconnecting DG from the distribution network must be determined, since system operators can not control DG connection to the network in the on-line. In this paper, the authors propose an algorithm to determine the loss-minimum configuration for a distribution system with DGs maintaining system reliability. Namely, in the proposed algorithm, when the loss-minimum configuration is determined under the line current capacity and voltage drop constraints, n-1 contingencies for DGs are also considered. In order to determine the loss-minimum configuration, tabu search added strategic oscillation is employed. Numerical simulations are carried out for a real scale system model with 118 sectionalizing switches (configuration candidates is 2118) in order to examine the validity of the proposed algorithm. Furthermore, performance of the proposed method is compared with a conventional metaheuristic method, which is Simulated Annealing (SA), through numerical simulations for the system model.
Computation Method for Simultaneous Transfer Capability Considering Wheeled Power by PPS

Yasuhiro Hayashi, Junya Matsuki, Takayuki Ikeda

IEEJ Transactions on Power and Energy 122 ( 12 ) 1366 - 1375 2002.12 [Refereed]

　View Summary

Open access to electric power transmission networks has been carried out in order to foster generation competition and customer choice in the worldwide. Available transfer capability(ATC) is the largest additional amount of power above some base flow which can be transferred between two sets of buses under constraints such as voltage limit, overloads, stability and n-1 contingencies. Calculation of ATC is important to promote open access to electric power transmission networks. If there are several ATC between two sets of buses, simultaneous transfer capability(STC) of power transmission networks must be calculated. STC is defined as the ability of a transmission network to allow for the reliable movement of electric power from areas of supply to areas of demand. In this paper, a new algorithm to precisely calculate STC is proposed. The proposed method is based on linear programming(LP) based DC power flow and optimal power flow (OPF). Namely, LP base DC power flow is used to obtain the initial solution of STC, and then OPF using successive quadratic programming (SQP) is applied to obtain feasible solution of STC under the operational constraints such as balance of power supply and demand, voltage limit, overloads, generation limit, steady state stability and n-1 contingencies. Furthermore, if power wheeling transactions by several PPSs are simultaneously requested for the transmission network, it seems that the acceptable quantity for the requested wheeling power must be indicated to PPSs from a view point of the transmission network reliability. An algorithm to calculate the acceptable quantity for the requested wheeling power is also proposed by using STC computation. In order to check the validity of the proposed methods, numerical results are shown for 6 and IEEE 30 buses system models.
Calculation of the Loss-minimum Configuration in IEEJ Local Power System Model

Yasuhiro Hayashi, Junya Matsuki, Ikuo Kurihara

電気学会論文誌B 122 ( 10 ) 1082 - 1088 2002.10 [Refereed]

　View Summary

In Japan, local power systems (77kV) are served from the 275kV or 154kV substations. For enhancement of power supply reliability, the transmission lines are connected to several substations, and the operational configuration is radial. The local power system's configuration is determined by connecting and disconnecting transmission lines so as to keep the radial structure and satisfy the operational constraints. When a local power system has a number of transmission lines, many configuration candidates occurs. Recently, an IEEJ committee made a practical scale local system model (IEEJ Local System Model). Since IEEJ Local System Model has 76 transmission lines, the total number of configuration candidates is 276(=7.5×1022 approximately). In this paper, the authors try to strictly obtain the loss-minimum configuration under constraints such as substation capacity, line capacity and radial structure in IEEJ Local System Model. In order to obtain the optimal configuration, a new computation algorithm is proposed. In the proposed algorithm, the configuration determination problem is replaced as two combinatorial optimization problems based on the operational constraints (1)substation capacity, (2)line capacity and (3)radial structure). One combinatorial optimization problem (subprobleml) is to pick up all partial configurations satisfied with line capacity and radial structure constraints. The, other one (subproblem2) is to select the partial configurations so as to minimize total line loss under the substation capacity constraint. By using the enumeration method, subprobleml is solved. Subproblem2 is solved by using the reduced ordered binary decision diagram (ROBDD). Since the proposed method is based on enumeration and Boolean function, the optimality of obtained solution is guaranteed.
Optimal allocation of dispersed generators for loss minimization

K Nara, Y Hayashi, B Deng, K Ikeda, T Ashizawa

ELECTRICAL ENGINEERING IN JAPAN 136 ( 2 ) 1 - 8 2001.07 [Refereed]

　View Summary

Dispersed generators (DGs) such as fuel cells and solar cells will be installed on the demand side of power systems. Such dispel scd facilities can reduce distribution system loss by appropriate allocation. Planning and operation of distribution systems with the dispersed facilities have already been discussed. In this paper, the authors discuss the extent to which distribution system loss can be reduced if DGs are optimally allocated on the demand side of the distribution system. In order to determine the optimal allocation and size of DGs so as to minimize the distribution system loss, an algorithm based on tabu search is employed. The proposed algorithm consists of iterated nested use of the tabu search algorithm. Namely, in the proposed algorithm, in one computational iteration, after the location of the DG is temporarily determined by tabu search, the size of the DG is also determined by tabu search so as to minimize the distribution system loss for the temporarily determined allocation. Numerical simulations are carried out fur two system models in order to examine the validity of the algorithm. (C) 2001 Scripta Technica, Electr Eng Jpn, 136(2): 1-8, 2001.
Determination Method for Optimal Secondary Power System Structure Using ROBDD

Yasuhiro Hayashi, Junya Matsuki, Koichi Nara

IEEJ Transactions on Power and Energy 121 ( 2 ) 172 - 178 2001.02 [Refereed]

　View Summary

Secondary power systems (66kV) with radial system structures are served from the 275kV or 154kV substations. For enhancement of power supply reliability, the transmission line is connected to another substation. However, when the radial power system has a number of connected feeders, the combinatorial number of possible system structures by switching CBs becomes very large. In this paper, a new solution method to determine the optimal secondary power system configuration is proposed. In the proposed method, the determination problem of the optimal system structure is treated as a minimum spanning tree problem with constraints, and then it is solved by using reduced ordered binary decision diagram (ROBDD). Since the proposed method is based on Boolean function, the optimality of obtained solution is guaranteed. In order to check the validity of the proposed method, numerical simulations are carried out for system models, and the results obtained by branch and bound method are compared with these of proposed method.
Application of tabu search to optimal placement of distributed generators

K Nara, Y Hayashi, K Ikeda, T Ashizawa

2001 IEEE POWER ENGINEERING SOCIETY WINTER MEETING, CONFERENCE PROCEEDINGS, VOLS 1-3 918 - 923 2001 [Refereed]

　View Summary

Distributed generators (DGs) such as fuel cells, solar cells, wind mills and micro gas turbines, etc. are going to be installed in demand side of power systems. Such distributed generators can reduce distribution loss if they are placed appropriately in the distribution system. In this paper, tabu search application for finding the optimal allocation of DGs from a viewpoint of loss minimization is illustrated. In other words, the authors discuss about an implementation method of tabu search to find how much distribution loss can be reduced if DGs are optimally allocated at the demand side of a power system. Namely, locations and discrete capacities of DGs to minimize the distribution loss are determined by nested use of the tabu search algorithm. Numerical examples are shown to demonstrate the method.
Optimal Allocation of Dispersed Generators for Loss Minimization

Koichi Nara, Yasuhiro Hayashi, Bin Deng, Kazushige Ikeda, Tomoo Ashizawa

IEEJ Transactions on Power and Energy 120 ( 5 ) 672 - 677 2000.05 [Refereed]

　View Summary

Dispersed generators (DG) such as fuel cells and solar cells etc. are going to be installed in demand side of power systems. The dispersed facilities can reduce distribution system loss by the appropriate allocation. So far, planning and operation of distribution system with the dispersed facilities have been discussed. In this paper, the authors discuss about how much the distribution system loss minimization can be reduced if DGs are optimally allocated at the demand side of the distribution system. In order to determine the optimal allocation and size of DG for minimizing the distribution system loss, an algorithm based on tabu search is employed. The proposed algorithm consists of the repetition of nested use of the tabu search algorithm. Namely, in the proposed algorithm, in one computational iteration, after the location of DG is temporarily determined by tabu search, the size of DG is also determined by tabu search so as to minimize the distribution system loss for the temporarily determined allocation. Numerical simulations are carried out for two system models in order to examine the validity of the algorithm.
An Approximate Solution Algorithm for Load Balancing of Distribution Systems

Keeyoung Nam, Yasuhiro Hayashi, Koichi Nara

IEEJ Transactions on Power and Energy 118 ( 9 ) 983 - 989 1998.09 [Refereed]

　View Summary

This paper proposes a new algorithm to obtain an approximate optimal solution for the load balancing of large-scale radial distribution system. Since the problem is formulated as a combinatorial optimization problem because of the discreteness of load section connection, it is difficult to solve a large-scale combinatorial optimization problem accurately within the reasonable computational time. So for, in order to find an approximate optimal solution quickly, the authors have published a solution method based on the network flow incremental algorithm. Although the incremental algorithm can find the optimal solution to the problem, the result is not always radial (feasible). So as to overcome this deficiency, in this paper, the authors propose a new algorithm that can find the load balanced radial distribution feeder configuration. The proposed algorithm picks up load by a unit of a section load. Therefore, the problem is elementarily a combinatorial optimization problem. However, to avoid the permutation, the algorithm employs a heuristic algorithm based on the mathematical concept of the optimality of the incremental algorithm. In picking up section load, the algorithm can take into account not only the current load balance but also the expected load which feeders should pick up afterward. To realize this algorithm, a combination of labels is introduced to each node. Through numerical examples, the validity of the proposed method is examined.
Reliable electrical power supply by DGS for unbundled power quality services

K Nara, Y Hayashi

PROCEEDINGS OF EMPD '98 - 1998 INTERNATIONAL CONFERENCE ON ENERGY MANAGEMENT AND POWER DELIVERY, VOLS 1 AND 2 AND SUPPLEMENT 11 - 16 1998 [Refereed]

　View Summary

The authors have been proposing a new electrical power delivery system named FRIENDS Flexible, Reliable and Intelligent Electrical eNergy Delivery System). FRIENDS is a new concept of power distribution system which can realize unbundled power duality services after de-regulated conditions. In order to realize FRIENDS, we must develop a system network configuration of FRIENDS itself For unbundled power quality services, especially, for reliable power supply, the authors propose a new algorithm to create a network of FRIENDS. The proposed method is based on tabu search, and can find the, le: ast cost network configuration of FRIENDS under the constraint that no overloaded exists in multiple fault cases.
Determination of Newly Installed Feeder Route Considering Use of Existing Feeder

Koichi Nara, Yasuhiro Hayashi, Yukihiro Yamafuji, Hideo Tanaka, Jun Hagihara, Shoichi Muto, Kotaro Tuchida, Masahiro Sakuraoka

IEEJ Transactions on Power and Energy 117 ( 6 ) 798 - 805 1997.06 [Refereed]

　View Summary

In planning a distribution system for urban area, when a feeder is newly installed, the route of the feeder must be determined among many candidates, considering investment cost and constraints. However, it is difficult for planners to find the optimal route of the newly installed feeder. Because too many candidates of route exist which can be constructed along the road on service area of the power company. It must be considered whether the end part of an existing feeder can be used as apart of newly installed feeder within specified loaded value. In this paper, in order to support planners' decision for selecting optimal route of newly installed feeders, the authors have formulated the problem mathematically, and propose a new solution algorithm to find the optimal route by referring Dijkstra Method. Through numerical examples, authors demonstrate the validity of the proposed method.
An algorithm for thermal unit maintenance scheduling through combined use of GA SA and TS

H Kim, Y Hayashi, K Nara

IEEE TRANSACTIONS ON POWER SYSTEMS 12 ( 1 ) 329 - 335 1997.02 [Refereed]

　View Summary

This paper describes a method of solving a large scale long term thermal unit maintenance scheduling problem. In the solution algorithm, the genetic algorithm(GA), the simulated annealing(SA) and the tabu search(TS) are cooperatively used. The solution algorithm keeps the advantages of individual algorithm and shows a reasonable combination of local search and global search. The method takes the maintenance class and several consecutive years scheduling into consideration. Several real scale numerical examples demonstrate the effectiveness of the proposed method.
Development of Negotiation Expert System for Subtransmission System Planning

Y. Aihara, Y. Hayashi, T. Terashima, I. Takemoto, S.Iwamoto

IEEJ Transactions on Power and Energy 115 ( 7 ) 778 - 786 1995.07 [Refereed]

　View Summary

Recently the task of planning in power systems is becoming a very complicated process for utility planners. This kind of planning has a lot of objectives to accomplish. In this paper we employ Negotiation Algorithm, which was proposed by the group of Chen-Ching Liu, for subtransmission power system planning to create a plan having many objectives. First, the Goal-Decision-Network(GDN) is constructed to model this planning problem, and Negotiation Algorithm is applied to utilize both subtrasmission system planning GDN, which attempts to capture its knowledge, and negotiation operators, which search for the most feasible and promising decisions in this planning GDN. Finally the negotiation expert system is demonstrated for the subtransmission system planning using a real system.
The performance of hybridized algorithm of GA SA and TS for thermal unit maintenance scheduling

H Kim, Y Hayashi, K Nara

1995 IEEE INTERNATIONAL CONFERENCE ON EVOLUTIONARY COMPUTATION, VOLS 1 AND 2 114 - 119 1995 [Refereed]
Application of Improved Hopfield Model to Voltage Control Problem

Yasuhiro Hayashi, Shinichi Iwamoto

IEEJ Transactions on Power and Energy 112 ( 8 ) 685 - 692 1992.08 [Refereed]

　View Summary

The voltage control calculation is the combinatorial optimization problem, and it has been difficult to solve this type of problem quickly with the conventional digital computer. However according to the modelling of excellent parallel processing ability of neurons, it has become possible to carry out the optimization with the Hopfield neural network model. In this paper, in order to solve the voltage control problem we propose an improved Hopfield model which has an individual input-output function for an individual neuron to achieve a drastic improvement in the calculation time.
Introduction of Neural Network Theory to Load Flow Problem

Yasuhiro Hayashi, Shinichi Iwamoto

IEEJ Transactions on Power and Energy 111 ( 7 ) 713 - 722 1991.07 [Refereed]

　View Summary

In recent years, according to the modelling of excellent information processing ability of neurons, it has become possible to carry out pattern recognitions or optimizations with the neural network theory. In this paper, we show how to introduce the neural network theory to the load-flow calculation of rectangular coordinate. A problem which input-output functions have for neural network applications is pointed out, and effects of changes in load patterns and system size are discussed in terms of the optimal multiplier. Results of simulations are shown with the convergence characteristics.

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Books and Other Publications

配電ネットワークシステム工学

林泰弘監修, 配電系統ラディカル化検討会, 編著

オーム社 2021.03
Cyber Security for Voltage Control of Distribution Systems Under Data Falsification Attacks

Hideaki Ishii, Shinya Yoshizawa, Yu Fujimoto, Isao Ono, Takashi Onoda, Yasuhiro Hayashi

Springer International Publishing 2020
“Demand-Side Response/Home Energy Management”, Smart Grid Handbook

Hideo Ishii, Wataru Hirohashi, Masataka Mitsuoka, Yasuhiro Hayashi( Part： Joint author)

John Wiley & Sons, Ltd. 2016.06 ISBN: 9781118755488
スマートグリッド学—戦略・技術・方法論—

林泰弘, 編著, 岡本浩, 林秀樹, 濱坂隆, 伊奈友子, 坂本紀代美

日本電気協会新聞部 2010.12
スマートグリッドの構成技術と標準化

横山明彦, 林泰弘, 坂東茂, 林秀樹, 新井正伸, 姉川尚史, 合田忠弘, 浅野浩志, 今井伸一, 木槻純一, 山田竜也, 弥栄邦俊

日本規格協会 2010.06 ISBN: 9784542301832
電力系統の最適潮流計算(OPF,Optimal Power Flow)

関根泰次, 横山明彦, 安田恵一郎, 林泰弘, 田辺隆也, 岡本浩, 多田泰之

日本電気協会 2002

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Misc

電気をよむ・あやつる : beyond 2030(第8回)有効な資源を結びつける

藤本悠, 芳澤信哉, 石井英雄, 林泰弘

OHM = オーム 106 ( 10 ) 42 - 47 2019.10

CiNii
電気をよむ・あやつる : beyond 2030(第6回)再エネを使い切る(1)スマートな需要家

広橋亘, 光岡正隆, 芳澤信哉, 石井英雄, 林泰弘

OHM = オーム 106 ( 8 ) 47 - 51 2019.08

CiNii
電気をよむ・あやつる : beyond 2030(第5回)再エネの弱点を補う(3)スマートに連系する

石井英雄, 芳澤信哉, 林泰弘

OHM = オーム 106 ( 7 ) 51 - 55 2019.07

CiNii
Study on Predictive Voltage Control Scheme based on Voltage Fluctuation Estimation in Distribution System

2019 ( 1 ) 21 - 26 2019.01

CiNii
A Determination Method for Voltage Reactive Power Control Operation based on Cooperation of Two-Voltage Class in Transmission Systems with PV Systems

2019 ( 1 ) 39 - 44 2019.01

CiNii
41150 既存工業化住宅を用いた改修型ゼロ・エネルギーハウスの提案と実証評価その3 自立的なエネルギー運用を目指した設備・制御計画

常岡優吾, 大木玲奈, 山口真吾, 菅野颯馬, 中川純, 廣川由樹, 渡辺直哉, 小林達宏, 田辺新一, 秋元孝之, 林泰弘, 若尾真治

環境工学II ( 2018 ) 315 - 316 2018.07

CiNii
集中型電圧制御に基づく大規模配電系統に対するサイバー攻撃シナリオの一検討

青木勇輔, 芳澤信哉, 藤本悠, 小野功, 石井秀明, 小野田崇, 林泰弘

計測自動制御学会システム・情報部門学術講演会講演論文集(CD-ROM) 2017 2017

J-GLOBAL
Effectiveness Evaluation of Waiting Strategy of PV Output Curtailment with PCS for Customers and Distribution Network Operators under Variable Conditions

2016 ( 80 ) 129 - 134 2016.09

CiNii
Effectiveness Evaluation of Waiting Strategy of PV Output Curtailment with PCS for Customers and Distribution Network Operators under Variable Conditions

2016 ( 60 ) 129 - 134 2016.09

CiNii
集中型電圧制御方式に基づく配電系統に対するサイバー攻撃シナリオの自動探索プラットフォームの構築

青木勇輔, 小野川瑞季, 芳澤信哉, 藤本悠, 小野功, 石井秀明, 小野田崇, 林泰弘

計測自動制御学会システム・情報部門学術講演会講演論文集(CD-ROM) 2016 2016

J-GLOBAL
集中型電圧制御に基づく配電系統のデータ改ざん攻撃に対するロバスト化手法

小野川瑞季, 芳澤信哉, 藤本悠, 石井秀明, 小野功, 小野田崇, 林泰弘

計測自動制御学会システム・情報部門学術講演会講演論文集(CD-ROM) 2016 2016

J-GLOBAL
Energy Disaggregation Based on Weighted Semi-Binary NMF

115 ( 323 ) 189 - 194 2015.11

CiNii
D-20-9 Application of Semi-Binary Matrix Factorization for Non-Intrusive Appliance Load Monitoring

Matsumoto Masako, Fujimoto Yu, Hayashi Yasuhiro

Proceedings of the IEICE General Conference 2015 ( 2 ) 178 - 178 2015.02

CiNii
Basic Study of Optimization of Voltage Control in Distribution Grids Considering Parameter Update of Advanced SVRs

2014 ( 82 ) 47 - 52 2014.09

CiNii
Evaluation of Coordinated EMS Method between GEMS and HEMS Composed of Forecast-Operation-Control Flow

2014 ( 66 ) 63 - 67 2014.09

CiNii
41081 Collaboration Control of Window System and Air Conditioner in Consideration of Human Thermal Comfort and Energy Saving : Part2: A Comparison of Electric Power Consumption between Collaboration Control and Control of Only Air-Conditioning System

Ebe Marina, Takenaka Takeshi

Summaries of technical papers of annual meeting 2014 161 - 162 2014.09

CiNii
41501 Practical Study of Zero Energy House : Part 2. Effect of Energy conservation by outer skin performance and installation of collaboration control

HARADA Naoyuki

Summaries of technical papers of annual meeting 2014 1045 - 1046 2014.09

CiNii
41500 Practical Study of Zero Energy House : Part 1. Outline of target building and method of collaboration control simulation analysis

ISHII Yoshiaki

Summaries of technical papers of annual meeting 2014 1043 - 1044 2014.09

CiNii
41080 Collaboration Control of Window and Air-Conditioning System in Consideration of Human : Thermal Comfort and Energy Saving Part1:Detail about The Control System and Outline of The Target Housing

Takenaka Takeshi, Ebe Marina

Summaries of technical papers of annual meeting 2014 159 - 160 2014.09

CiNii
Development of an Energy-Saving Operation System of Residence by Using Home Energy Management System and Visualization of Temperature and Electric Energy

TAKENAKA Takeshi, HARADA Naoyuki, OBA Daisuke, NAKAGAWA Jun, NAGASAWA Natsuko, HIROHASHI Wataru, HAYASHI Yasuhiro, TANABE Shin-ichi

IEICE technical report. ASN, Ambient intelligence and sensor networks 114 ( 65 ) 35 - 36 2014.05

　View Summary

When construction of net-zero energy house, we develop and implement two energy consumption systems by using ICT. The first one is HEMS which control window systems and housing systems using environmental information, such as solar radiation, indoor and outdoor temperature, for create favorable environment. By using another control algorithm season to season make it possible to energy saving through years. The second one is environmental visualizing system by using organic EL lighting panel. That adapt environmental information, such as indoor and outdoor temperature, electric energy to panel's coloring, that induce environment adjustment behavior of residents. These two systems aims to realize comfortable life with saving energy.

CiNii
配電系統電圧制御におけるサイバー攻撃検知に関する考察

磯崎保徳, 芳澤信哉, 藤本悠, 石井秀明, 小野功, 小野田崇, 林泰弘

計測自動制御学会制御部門マルチシンポジウム(CD-ROM) 1st 2014

J-GLOBAL
Modeling and Simulation for Energy Management : Using Integrated Simulation Model of Grid and Home EMS(<Special Feature>Modeling and Simulation for Energy Management)

Hayashi Yasuhiro

Journal of the Japan Society for Simulation Technology 32 ( 3 ) 162 - 167 2013.09

CiNii
Fundamental Study on Introdution of Fuel Cells into Collective Housing Considering Demand Variability

KAMEDA Manato, FUJIMOTO Yu, HAYASHI Yasuhiro

2013 ( 52 ) 133 - 138 2013.09

CiNii
Proposal and Quantitative Evaluation of Cooperative Control Method of EV and HP for Residential PV Systems considering the behavior pattern of consumers

YAMAMOTO Kenta, HIROHASHI Wataru, FUJIMOTO Yu, HAYASHI Yasuhiro

2013 ( 34 ) 153 - 158 2013.09

CiNii
Detarmining Method of Optimal Control Parameter of Advanced SVR considering PV Fluctuations

YAMAMOTO Yuya, YOSHIZAWA Shinya, YOSHINAGA Jun, HAYASHI Yasuhiro, SASAKI Shunsuke, SHIGETOU Takaya, NOMURA Hideo

2013 ( 78 ) 87 - 92 2013.09

CiNii
Further Energy Management of Smart House : Advanced HEMS using the Demand Response Technology

HAYASHI Yasuhiro

34 ( 4 ) 193 - 197 2013.07

CiNii
Challenge and Vision of Japanese Smart Grid

HAYASHI Yasuhiro

Journal of the Japan Society of Mechanical Engineers 116 ( 1133 ) 224 - 227 2013.04

CiNii
次世代送配電系統最適制御技術実証の進展 (特集スマートグリッド技術の進展)

横山明彦, 赤木泰文, 林泰弘

電気評論 97 ( 10 ) 19 - 24 2012.10

CiNii
Evaluation of Determination approach of Optimal Allocation and Transfer of SVRs for Uncertainty of PV Penetration in Distribution System

YOSHIZAWA Shinya, FUJIMOTO Yu, HAYASHI Yasuhiro, KAMIYA Eiji

2012 ( 143 ) 7 - 11 2012.08

CiNii
Evaluation of Determination approach of Optimal Allocation and Transfer of SVRs for Uncertainty of PV Penetration in Distribution System

YOSHIZAWA Shinya, FUJIMOTO Yu, HAYASHI Yasuhiro, KAMIYA Eiji

2012 ( 159 ) 7 - 11 2012.08

CiNii
Improvement of Power Quality in Distribution System by Cooperative Control of Power Conditioner Systems

Motohiko Tanaka, Shoji Kawasaki, Hisao Taoka, Junya Matsuki, Yasuhiro Hayashi

Journal of International Council on Electrical Engineering 2 ( 1 ) 72 - 78 2012
Analysis on Harmonics of Distribution Network with Distributed Generators

Shoji Kawasaki, Yasuhiro Hayashi, Junya Matsuki

Journal of Energy and Power Engineering 6 ( 2 ) 220 - 229 2012
太陽光発電システム群の力率制御とLRTによる協調型電圧制御法

川崎章司, 金本憲明, 田岡久雄, 松木純也, 林泰弘

電気学会論文誌Ｂ 132 ( 4 ) 309 - 316 2012

DOI
Multi Evaluation for Optimum Instalation Location of STATCOMs

Naohiro Kurokawa, Shoji Kawasaki, Hisao Taoka, Junya Matsuki, Yasuhiro Hayashi

Proc. of the International Conference on Electrical Engineering 2012 ( P-EM-15 ) 2012
次世代送配電系統最適制御技術実証--太陽光発電の大量普及を可能とするために (特集スマートシティ,スマートグリッドをはじめとした次世代エネルギー社会システム技術の動向)

横山明彦, 赤木泰文, 林泰弘

電気評論 96 ( 10 ) 34 - 38 2011.10

CiNii
Analysis of prediction of output suppression loss for clustered grid-interconnected PV systems

MIYAMOTO Yusuke, HAYASHI Yasuhiro

2011 ( 52 ) 61 - 66 2011.09

CiNii
Improvement Method of Power Quality in Distribution System by Reidential PV System

TANAKA Motohiro, KAWASAKI Shoji, TAOKA Hisao, MATSUKI Junya, SHIMEI Ryo, HAYASHI Yasuhiro

2011 ( 52 ) 73 - 78 2011.09

CiNii
A Study on Accuracy of Fault Locator in Distribution System with Distributed Generations

IIOKA Daisuke, HAYASHI Yasuhiro

2011 ( 57 ) 13 - 18 2011.09

CiNii
Evaluation of Voltage Control Method for Minimization of Number of Customers with Voltage Violation during Bank Fault Restoration

YOSHIZAWA Shinya, HAYASHI Yasuhiro, MORI Kenjiro, KAMIYA Eiji

2011 ( 124 ) 85 - 89 2011.09

CiNii
Evaluation of Voltage Control Method for Minimization of Number of Customers with Voltage Violation during Bank Fault Restoration

YOSHIZAWA Shinya, HAYASHI Yasuhiro, MORI Kenjiro, KAMIYA Eiji

2011 ( 141 ) 85 - 89 2011.09

CiNii
Load Management using Heat-Pump Water Heater and Electric Vehicle Battery Charger in Distribution System with PV

Yasuhiro Hayashi, Yuji Hanai, Kazuaki Yoshimura, Junya Matsuki

Journal of International Council on Electrical Engineering 1 ( 2 ) 207 - 213 2011.04
A Service Restoration Method of Distribution System Considering Many Connections of DGs

H. Takano, S. Sugaya, Y. Hayashi, J. Matsuki

Memoir of Gifu National College of Technology 46 77 - 82 2011.03 [Refereed]
A Study of Delay of Calculation Time in a Parallelized Determination Method of Distribution Network Configuration

H. Takano, M. Suganuma, R. Shibata, Y. Hayashi, J. Matsuki

Memoir of Gifu National College of Technology 46 83 - 88 2011.03 [Refereed]

Rapid communication, short report, research note, etc. (bulletin of university, research institution)
PSOによるパラメータ推定を適用した動的負荷モデルの構築

田岡久雄, 松木純也, 友田道也, 林泰弘, 山岸良雄, 金尾則一

電気学会論文誌B 131 ( 7 ) 2011

DOI
同期発電機の制動巻線による分散形電源連系時の三相不平衡の改善

松木純也, 田岡久雄, 林泰弘, 岩本繁, 大穀晃裕

電気学会論文誌B 131 ( 9 ) 724 - 729 2011

DOI
センサ開閉器情報を利用した複数台PCSによる配電ネットワークにおける総合電圧ひずみ率抑制手法

川崎章司, 下田一貴, 田中基寛, 田岡久雄, 松木純也, 林泰弘

電気学会論文誌Ｂ 131 ( 12 ) 936 - 944 2011

DOI
Measured Impedance at Incoming Feeder of Distributed Resources Interconnected to Loop-Shaped Distribution System

D.Iioka, Y.Hayashi

IEEE PES General Meeting, Detroit, USA 2011
Three-Phase Short-Circuit Fault Locator in Loop Shaped Distribution System with Inverter Based Distributed Generations

D.Iioka, Y.Hayashi

the 17th Power Systems Computation Conference (PSCC'11) 2011
Cooperative Voltage Control and Improvement of Voltage Imbalance by STATCOMs in Response to Extensive Interconnection with Distribution System of Renewable Energy Resources

S. Kawasaki, Y. Hayashi, N. Takahashi

17th Power Systems Computation Conference (PSCC2011), Stockholm, Sweden 2011
Measured Impedance at Incoming Feeder of Distributed Resources Interconnected to Loop-Shaped Distribution System

D.Iioka, Y.Hayashi

IEEE PES General Meeting, Detroit, USA 2011
Three-Phase Short-Circuit Fault Locator in Loop Shaped Distribution System with Inverter Based Distributed Generations

D.Iioka, Y.Hayashi

the 17th Power Systems Computation Conference (PSCC'11) 2011
Cooperative Voltage Control and Improvement of Voltage Imbalance by STATCOMs in Response to Extensive Interconnection with Distribution System of Renewable Energy Resources

S. Kawasaki, Y. Hayashi, N. Takahashi

17th Power Systems Computation Conference (PSCC2011), Stockholm, Sweden 2011
総論・スマートグリッド技術の動向と展開

林泰弘

電気評論 2010 ( 11 ) 18 - 23 2010.11
Restraint Method of Voltage Total Harmonic Distortion in Distribution System by Power Conditioner Systems Using Measured Data from IT Switches

S. Kawasaki, J. Matsuki, Y. Hayashi

The 9th International Power and Energy Conference (IPEC2010) 2010.10

DOI
Restraint Method of Voltage Total Harmonic Distortion in Distribution System by Power Conditioner Systems Using Measured Data from IT Switches

S. Kawasaki, J. Matsuki, Y. Hayashi

The 9th International Power and Energy Conference (IPEC2010) 2010.10

DOI
Restraint Method of Voltage Total Harmonic Distortion in Distribution Network by Power Conditioner System Using Measured Data from IT Switches

KAWASAKI Shoji, SHIMODA Kazuki, MATSUKI Junya, HAYASHI Yasuhiro

2010 ( 46 ) 115 - 120 2010.09

DOI
解説・スマートグリッドの国内動向

林泰弘

低温工学会報 vol.45 ( No.9 ) 410 - 416 2010.09

DOI CiNii
Impact of Power System Configuration and Control Methodology of Inverter Based Distributed Generation on Fault Current

D. Iioka, Y. Hayashi

16th International Conference on Electrical Engineering (ICEE) 2010.07
Verification of Multi-Objective Power Factor Control Method of Photovoltaic Generation Systems by Scaled-down Distribution Network Equipment

N. Kanemoto, S. Sakai, S. Kawasaki, J. Matsuki, Y. Hayashi

16th International Conference on Electrical Engineering (ICEE) 2010.07
An Evaluation of Influences on Distribution Network by Connection Cases of PVs

H. Takano, K. Nagata, Y. Hayashi, J. Matsuki

I16th International Conference on Electrical Engineering (ICEE) 2010.07
A Basic Study of Coordinated Control Method for Heat Pump Water Heaters and Electric Vehicle Battery Chargers

Y. Hanai, K. Yoshimura, J. Matsuki, Y. Hayashi

16th International Conference on Electrical Engineering (ICEE) 2010.07
Impact of Power System Configuration and Control Methodology of Inverter Based Distributed Generation on Fault Current

D. Iioka, Y. Hayashi

16th International Conference on Electrical Engineering (ICEE) 2010.07
Verification of Multi-Objective Power Factor Control Method of Photovoltaic Generation Systems by Scaled-down Distribution Network Equipment

N. Kanemoto, S. Sakai, S. Kawasaki, J. Matsuki, Y. Hayashi

16th International Conference on Electrical Engineering (ICEE) 2010.07
An Evaluation of Influences on Distribution Network by Connection Cases of PVs

H. Takano, K. Nagata, Y. Hayashi, J. Matsuki

I16th International Conference on Electrical Engineering (ICEE) 2010.07
A Basic Study of Coordinated Control Method for Heat Pump Water Heaters and Electric Vehicle Battery Chargers

Y. Hanai, K. Yoshimura, J. Matsuki, Y. Hayashi

16th International Conference on Electrical Engineering (ICEE) 2010.07
スマートグリッドと国内導入の必要性

林泰弘

電気協会報・特集 2010 ( 5 ) 7 - 11 2010.05
Verification of Stabilization of Output by Binary Control and Smoothing Effect of PV Systems

IWASAKI Masayuki, KAWASAKI Shoji, MATSUKI Junya, SHO Isou, HAYASHI Yasuhiro, HAYASHI Takanori, OKUNO Yoshimichi, FUNABASHI Toshihisa

2010 ( 11 ) 89 - 94 2010.03

CiNii
A Basic Study of Coordinated Operation Method for Heat-Pump Water Heater and Electric Vehicle Battery Charger for Maximize PV Output and Keeping Distribution System Voltage

HANAI Yuji, YOSHIMURA Kazuaki, MATSUKI Junya, HAYASHI Yasuhiro

2010 ( 11 ) 113 - 118 2010.03

CiNii
Smoothing Fluctuated Output of Wind Power Generation System for Minimum Capacity of Storage Buttery and Conservation of Proper Voltage in Distribution Network

KAMIMURA Hirotoshi, SAKAI Shigekazu, HAYASHI Yasuhiro, KAWASAKI Shoji, MATSUKI Junya, WAKAO Shinji

2010 ( 11 ) 83 - 87 2010.03

CiNii
Verification of Voltage Control Capability of a Loop Distribution System for Fault Section Isolation

HANAI Yuji, HAYASHI Yasuhiro, MATSUKI Junya

2010 ( 11 ) 59 - 64 2010.03

CiNii
Central Voltage Control Method for Distribution Systems Using Measurement Data from IT Switches

KURIHARA Masanori, HANAI Yuji, MATSUKI Junya, HAYASHI Yasuhiro, MORI Kenjiro, FUWA Yoshiaki

2010 ( 11 ) 65 - 70 2010.03

CiNii
A Basic Study on Application of a Parallel Computing Platform to Determination Method of Distribution Network Configuration

H. Takano, K. Yabashi, R. Shibata, Y. Hayashi, J. Matsuki

Memoir of Gifu National College of Technology 45 39 - 44 2010.03 [Refereed]

Rapid communication, short report, research note, etc. (bulletin of university, research institution)
A Study of the Validity of a Computation Method to Determine Loss Minimum Configuration by Using Distribution Network Equipment

H. Takano, J. Masuda, Y. Hayashi, J. Matsuki, S. Sakai

Memoir of Gifu National College of Technology 45 45 - 50 2010.03 [Refereed]

Rapid communication, short report, research note, etc. (bulletin of university, research institution)
Voltage Control for a Loop Distribution System with Renewable Energy Sources

Y. Hanai, J. Matsuki, Y. Hayashi

The International Conference on Renewable Energies and Power Quality(ICREPQ'10), Spain 2010.03
Voltage Control for a Loop Distribution System with Renewable Energy Sources

Y. Hanai, J. Matsuki, Y. Hayashi

The International Conference on Renewable Energies and Power Quality(ICREPQ'10), Spain 2010.03
Development of distribution network equipment to support the solution of problem of connecting distributed generators (Answer) and verification experiment of active coordinated operation of distributed generator and distribution network

Shigekazu Sakai, Yasuhiro Hayashi, Shoji Kawasaki, Junya Matsuki, Junpei Baba, Akihiko Yokoyama, Masahide Hojo, Shinji Wakao, Kenjiro Mori, Yoshiaki Fuwa

IEEJ Transactions on Power and Energy 130 ( 5 ) 1 - 483 2010

　View Summary

Recently, total number of distributed generators (DGs) such as photovoltaic generation system and wind power generation system connected to an actual distribution network increases drastically. The distribution network connected with many distributed generators must be operated keeping reliability of power supply, and power quality. In order to accomplish active distribution network operation to take advantage of many connections of DGs, a new coordinated operation of distribution system with many connections of DGs is necessary. So far, the authors have proposed a coordinated operation of distribution network system connected with many DGs by using sectionalizing switches control method, sending voltage control method, computation method of acceptable maximum output of DG and determination method of optimal smoothing time constant of wind power generation system with storage battery. In this paper, the authors develop an experiment of scaled-down three-phase distribution system with distributed generators in order to check the validity of the proposed approach. © 2010 The Institute of Electrical Engineers of Japan.

DOI CiNii
Proposal and experimental verification of distribution voltage estimation and control method using measured data from IT switches

Yuji Hanai, Yasuhiro Hayashi, Junya Matsuki, Masanori Kurihara

IEEJ Transactions on Power and Energy 130 ( 10 ) 859 - 869 2010

　View Summary

This paper describes distribution voltage estimation and a control method using measured data from sectionalizing switches with sensors which are called IT switch. The voltage estimation is based on Particle Swarm Optimization (PSO) and all distribution line voltages are estimated by minimizing the weighted sum of voltage and current error at IT switch. The voltage control maintains all the estimated node voltages within the proper range by changing tap of a LRT in a distribution substation. In order to check the validity of the proposed method, numerical and experimental simulations are carried out on a distribution system model. © 2010 The Institute of Electrical Engineers of Japan.

DOI
Experimental verification of application of looped system and centralized voltage control in a distribution system with Renewable Energy Sources

Yuji Hanai, Yasuhiro Hayashi, Junya Matsuki

IEEJ Transactions on Power and Energy 130 ( 11 ) 932 - 940 2010

　View Summary

The line voltage control in a distribution network is one of the most important issues for a penetration of Renewable Energy Sources (RES). A loop distribution network configuration is an effective solution to resolve voltage and distribution loss issues concerned about a penetration of RES. In this paper, for a loop distribution network, the authors propose a voltage control method based on tap change control of LRT and active/reactive power control of RES. The tap change control of LRT takes a major role of the proposed voltage control. Additionally the active/reactive power control of RES supports the voltage control when voltage deviation from the upper or lower voltage limit is unavoidable. The proposed method adopts SCADA system based on measured data from IT switches, which are sectionalizing switch with sensor installed in distribution feeder. In order to check the validity of the proposed voltage control method, experimental simulations using a distribution system analog simulator "ANSWER" are carried out. In the simulations, the voltage maintenance capability in the normal and the emergency is evaluated. © 2010 The Institute of Electrical Engineers of Japan.

DOI CiNii
Voltage control method by SVC in consideration of cooperative control with LRT and determination method for rated capacity and control parameters of SVC

Shoji Kawasaki, Yasuhiro Hayashi, Junya Matsuki, Masuhiro Yamaguchi

IEEJ Transactions on Power and Energy 130 ( 11 ) 963 - 971 2010

　View Summary

In recent years, the number of connection of distributed generators (DGs) such as the photovoltaic generation (PV) and wind power generation is increasing, and there is in danger of changing the voltages in a distribution system by the precipitous output variation of DGs. In this study, the authors propose one voltage control method of a distribution system by the static var compensator (SVC) in consideration of cooperation with the load ratio control transformer (LRT) of laggard control response installed beforehand in the distribution system. The proposed method may be able to make the rated capacity of SVC small and may be able to reduce the aggravation of power factor of the distribution system, by setting up the dead band of voltage control appropriately. And the authors propose one determination method of the necessary minimum rated capacity and optimum control parameters of SVC in view of the cost of equipment and high-speed controllability. In order to verify the validity of the proposed method, the numerical calculations are carried out by using a distribution system model. © 2010 The Institute of Electrical Engineers of Japan.

DOI CiNii
Restraint Method of Voltage Total Harmonic Distortion in Distribution System by Active Filter Operation of Distributed Generators with Inverter Using Measured Data from IT Switches

S. Kawasaki, K. Shimoda, J. Matsuki, Y. Hayashi

16th International Conference on Electrical Engineering (ICEE) 2010

DOI
A Basic Study of Load Management using Heat-Pump Water Heater and Electric Vehicle Battery Charger in Distribution System with PV

Y. Hanai, K. Yoshimura, J. Matsuki, Y. Hayashi

16th International Conference on Electrical Engineering (ICEE) 2010
Verification Experiment of Active Coordinated Operation of Distributed Generators Using Renewable Energy and Distribution Network

SAKAI Shigekazu, HAYASHI Yasuhiro, KAWASAKI Shoji, MATSUKI Junya, BABA Jumpei, YOKOYAMA Akihiko, HOJO Masahide, WAKAO Shinji, MORI Kenjiro, FUWA Yoshiaki

2009 ( 160 ) 37 - 42 2009.09

CiNii
The determination of most suitable smoothing time constant of the wind power generation output for minimum capacity of storage battery

KAMIMURA Hirotoshi, SAKAI Shigekazu, HAYASHI Yasuhiro, KAWASAKI Shoji, MATSUKI Junya, WAKAO Shinji

2009 ( 160 ) 49 - 53 2009.09

CiNii
Verification of Capacity Reduction Effect of Storage Battery of PV Systems Using Binary Control

IWASAKI Masayuki, HAYASHI Yasuhiro, KAWASAKI Shoji, MATSUKI Junya, HAYASHI Takanori, OKUNO Yoshimichi, FUNABASHI Toshihisa

2009 ( 160 ) 109 - 113 2009.09

CiNii
Power Factor Control Method of Photovoltaic Generation Systems for Maximization of Total Active Power Output

SAKAI Shigekazu, KANEMOTO Noriaki, HAYASHI Yasuhiro, KAWASAKI Shoji, MATSUKI Junya

2009 ( 160 ) 61 - 64 2009.09

CiNii
Evaluation of Stabilization Effect of Output by Number of PV System Using Binary Control

IWASAKI Masayuki, HAYASHI Yasuhiro, KAWASAKI Shoji, MATSUKI Junya, HAYASHI Takanori, OKUNO Yoshimichi, FUNABASHI Toshihisa

2009 ( 160 ) 115 - 119 2009.09

CiNii
Evaluation of Contribution Output Range of a Distributed Generator to Reduce Distribution Loss and CO_2 Emissions

TAKANO Hirotaka, HAYASHI Yasuhiro, MATSUKI Junya, NAGATA Kouichi

2009 ( 160 ) 95 - 100 2009.09

CiNii
Scheduling Method for Heat-Pump Water Heater and Electric Vehicle Battery Charger in Residence with PV System

HANAI Yuji, YOSHIMURA Kazuaki, HAYASHI Yasuhiro, KAWASAKI Shoji, MATSUKI Junya

2009 ( 160 ) 65 - 70 2009.09

CiNii
Seasonal Validation of Reduction Effect of Primary Energy Consumption and CO_2 Emission in Hierarchical Micro Grid

FUKUSHIMA Masafumi, KAWASAKI Shoji, MATSUKI Junya, HAYASHI Yasuhiro

2009 ( 140 ) 55 - 60 2009.09

CiNii
Determination Method for Rated Capacity and Control Parameters of SVC in Distribution System

KAWASAKI Shoji, MATSUKI Junya, YAMAGUCHI Masuhiro, HAYASHI Yasuhiro

2009 ( 83 ) 43 - 48 2009.09

CiNii
Experimental Verification of Central Voltage Control Method (LRT and SVR) for Distribution Systems Using Measurement Data from IT Switches

KURIHARA Masanori, HANAI Yuji, HAYASHI Yasuhiro, MATSUKI Junya

2009 ( 83 ) 55 - 60 2009.09

CiNii
分散型電源が連系された配電ネットワークにおけるアクティブフィルタの最適設置決定手法

川﨑章司, 林泰弘, 松木純也, 菊谷裕隆, 北條昌秀

電気学会論文誌B 129-B ( 6 ) 733 - 744 2009.06

DOI CiNii
A Study of the Optimal Configuration for Distribution System Considering Service Restoration

H. Takano, T. Tomida, Y. Hayashi, J. Matsuki

Memoir of Gifu National College of Technology 44 46 - 51 2009.03 [Refereed]

Rapid communication, short report, research note, etc. (bulletin of university, research institution)
Cooperative Voltage Control by LRT and STATCOM in Distribution System

S.Kawasaki, Y.Hayashi, J.Matuki, M.Yamaguchi, Y.Hanai

Proceedings of the International Conference on Electrical Engineering 2009 2009
Optimal Operation of Combined Heat and Power in Hierarchical Micro Grid

S.Kawasaki, Y.Hayashi, J.Matuki, M.Fukushima

Proceedings of the International Conference on Electrical Engineering 2009 2009
キャンパス配電系統における電力品質の実態把握と品質向上に関する研究

川崎章司, 松木純也, 林泰弘, 伊藤彰俊

電気学会論文誌B 129 ( 9 ) 1115 - 1122 2009

DOI
オンオフ制御による太陽光発電システム群の出力安定化制御手法

林泰弘, 川崎章司, 松木純也, 岩崎真幸, 舟橋俊久, 奥野義道, 林孝則

電気学会論文誌B 129 ( 12 ) 1576 - 1584 2009

DOI
Trend and future view of voltage control for distribution systems with distributed generators

Yasuhiro Hayashi

IEEJ Transactions on Power and Energy 129 ( 4 ) 491 - 494 2009

Book review, literature introduction, etc.

　View Summary

The number of installation of Distributed Generators (DG) such as photovoltaic and wind generations has been rapidly increasing in the world. Penetration of DG can contribute to reduce CO 2 emissions and conserve energy. On the other hand, since reverse power flow from DG to distribution system occurs exceed of the upper limit of adequate range of voltage, various voltage control methodologies have been proposed in order to keep voltage within the secure range. This paper describes several advanced voltage control technologies and shows the trend and future perspective about the control of distribution system with many DGs. © 2009 The Institute of Electrical Engineers of Japan.

DOI CiNii
A Study of the Optimal Configuration for Distribution System With Distributed Generators Considering N-1 Security

H. Takano, K. Koumura, Y. Hayashi, J. Matsuki

Memoir of Gifu National College of Technology 43 51 - 55 2008.03 [Refereed]

Rapid communication, short report, research note, etc. (bulletin of university, research institution)
Experimental Multi-objective Evaluation of Radial and Loop Distribution Network Configuration using Distribution Network Equipment

S.Sakai, Y.Hayashi, S.Kawasaki, J.Matuki, Y.Fuwa, K.Mori

IEEJ Transactions on Electrical and Electronic Engineering 3 ( 5 ) 530 - 539 2008

DOI
Online Optimization Method for Operation of Generators in a Micro Grid

Yasuhiro Hayashi, Hideki Miyamoto, Junya Matsuki, Toshio Iizuka, Hitoshi Azuma

IEEJ Transactions on Power and Energy 128 ( 2 ) 388 - 396 2008 [Refereed]

　View Summary

Recently a lot of studies and developments about distributed generator such as photovoltaic generation system, wind turbine generation system and fuel cell have been performed under the background of the global environment issues and deregulation of the electricity market, and the technique of these distributed generators have progressed. Especially, micro grid which consists of several distributed generators, loads and storage battery is expected as one of the new operation system of distributed generator. However, since precipitous load fluctuation occurs in micro grid for the reason of its smaller capacity compared with conventional power system, high-accuracy load forecasting and control scheme to balance of supply and demand are needed. Namely, it is necessary to improve the precision of operation in micro grid by observing load fluctuation and correcting start-stop schedule and output of generators online. But it is not easy to determine the operation schedule of each generator in short time, because the problem to determine start-up, shut-down and output of each generator in micro grid is a mixed integer programming problem. In this paper, the authors propose an online optimization method for the optimal operation schedule of generators in micro grid. The proposed method is based on enumeration method and particle swarm optimization (PSO). In the proposed method, after picking up all unit commitment patterns of each generators satisfied with minimum up time and minimum down time constraint by using enumeration method, optimal schedule and output of generators are determined under the other operational constraints by using PSO. Numerical simulation is carried out for a micro grid model with five generators and photovoltaic generation system in order to examine the validity of the proposed method.
Determination method of optimal operation schedule for fuel cells in collective housing

Yasuhiro Hayashi, Shoji Kawasaki, Junya Matsuki, Atsushi Tomomoto, Hideki Miyamoto, Toshihisa Funabashi, Yoshimichi Okuno, Takanori Hayashi

IEEJ Transactions on Power and Energy 128 ( 10 ) 3 - 1226 2008

　View Summary

In this paper, the authors propose a power and heat interchange system using fuel cells (FCs) in a collective housing and develop a determination method of optimal operation schedule for FCs in this system. The developed method is based on tabu search which is one of non-linear optimization methods. In the developed method, the optimal operation schedule is determined by using Pareto optimal solutions from two evaluation viewpoints ((1) running cost, (2) CO 2 emission). In order to examine the validity of the developed method, numerical simulations are carried out for the collective housing model with 12 houses in winter, summer and middle season, and the optimal operation schedules are determined. © 2008 The Institute of Electrical Engineers of Japan.

DOI
Optimal Allocation and Gain of Active Filter for Distribution Network Connected Distributed Generation

S.Kawasaki, Y.Hayashi, J.Matuki, H.Kikuya, M.Hojo

Proceedings of the International Conference on Electrical Engineering 2008 2008
MULTI EVALUATION METHOD OF DISTRIBUTION NETWORK WITH DISTRIBUTED GENERATORS

Y.Hayashi, S.Kawasaki, J.Matuki, S.Sakai, Y.Fuwa, K.Mori

Proceedings of the 16th Power Systems Computation Conference 2008
Multi Evaluation Method of Distribution Network with Distributed Generators

Y.Hayashi, S.Kawasaki, J.Matuki, S.Sakai, Y.Fuwa, K.Mori

International Journal of Innovations in Energy Systems and Power Vol 3 ( no. 2 ) 2008
Determination of Optimal Smoothing Time Constant of Wind Power Generation System with Storage Battery to Control Voltage and Load Fluctuation

Y.Hayashi, S.Kawasaki, S.Sakai, J.Matuki

Proceedings of the International Conference on Electrical Engineering 2008 2008
Determination method of optimal operation schedule for fuel cells in collective housing

Yasuhiro Hayashi, Shoji Kawasaki, Junya Matsuki, Atsushi Tomomoto, Hideki Miyamoto, Toshihisa Funabashi, Yoshimichi Okuno, Takanori Hayashi

IEEJ Transactions on Power and Energy 128 ( 10 ) 3 - 1226 2008

　View Summary

In this paper, the authors propose a power and heat interchange system using fuel cells (FCs) in a collective housing and develop a determination method of optimal operation schedule for FCs in this system. The developed method is based on tabu search which is one of non-linear optimization methods. In the developed method, the optimal operation schedule is determined by using Pareto optimal solutions from two evaluation viewpoints ((1) running cost, (2) CO 2 emission). In order to examine the validity of the developed method, numerical simulations are carried out for the collective housing model with 12 houses in winter, summer and middle season, and the optimal operation schedules are determined. © 2008 The Institute of Electrical Engineers of Japan.

DOI
Optimal Allocation and Gain of Active Filter for Distribution Network Connected Distributed Generation

S.Kawasaki, Y.Hayashi, J.Matuki, H.Kikuya, M.Hojo

Proceedings of the International Conference on Electrical Engineering 2008 2008
MULTI EVALUATION METHOD OF DISTRIBUTION NETWORK WITH DISTRIBUTED GENERATORS

Y.Hayashi, S.Kawasaki, J.Matuki, S.Sakai, Y.Fuwa, K.Mori

Proceedings of the 16th Power Systems Computation Conference 2008
Multi Evaluation Method of Distribution Network with Distributed Generators

Y.Hayashi, S.Kawasaki, J.Matuki, S.Sakai, Y.Fuwa, K.Mori

International Journal of Innovations in Energy Systems and Power Vol 3 ( no. 2 ) 2008
Determination of Optimal Smoothing Time Constant of Wind Power Generation System with Storage Battery to Control Voltage and Load Fluctuation

Y.Hayashi, S.Kawasaki, S.Sakai, J.Matuki

Proceedings of the International Conference on Electrical Engineering 2008 2008
Determination method of optimal operation schedule for fuel cells in collective housing

Yasuhiro Hayashi, Shoji Kawasaki, Junya Matsuki, Atsushi Tomomoto, Hideki Miyamoto, Toshihisa Funabashi, Yoshimichi Okuno, Takanori Hayashi

IEEJ Transactions on Power and Energy 128 ( 10 ) 3 - 1226 2008

　View Summary

In this paper, the authors propose a power and heat interchange system using fuel cells (FCs) in a collective housing and develop a determination method of optimal operation schedule for FCs in this system. The developed method is based on tabu search which is one of non-linear optimization methods. In the developed method, the optimal operation schedule is determined by using Pareto optimal solutions from two evaluation viewpoints ((1) running cost, (2) CO 2 emission). In order to examine the validity of the developed method, numerical simulations are carried out for the collective housing model with 12 houses in winter, summer and middle season, and the optimal operation schedules are determined. © 2008 The Institute of Electrical Engineers of Japan.

DOI
Experimental study on the unified power flow controller

Junya Matsuki, Yasuhiro Hayashi, Shunsuke Kitajima, Masahiro Takahashi, Kenji Murata

ELECTRICAL ENGINEERING IN JAPAN 161 ( 2 ) 8 - 15 2007.11

　View Summary

This paper presents the results of experimental Study on the performance of a Unified Power Flow Controller (UPFC), one of the FACTS (Flexible AC Transmission Systems) controllers. A laboratory-scale UPFC was manufactured and installed on a laboratory electric power system to investigate its multifunctional capabilities as a power flow controller. The UPFC consists of two 4.5-kVA, 200-V back-to-back voltage-sourced converters, labeled "Converter 1" and "Converter 2" operated from a common DC link provided by a DC storage capacitor of 380 V. It can provide independent control of both the real and reactive power flow in the line. Tests were performed to examine the capabilities of the UPFC, under one-machine connected to an infinite-bus system. Steady-state responses under various kinds of operating conditions were measured and analyzed. (c) 2007 Wiley Periodicals, Inc.

DOI
TCSCを用いた送電ネットワークの混雑管理手法

林泰弘, 松木純也, 米澤浩則

電気学会論文誌B 127 ( 10 ) 1073 - 1079 2007

DOI
連系可能最大出力の観点から見た配電系統に連系される風力発電システムの評価

花井悠二, 林泰弘, 松木純也, 小林直樹

電気学会論文誌B 127 ( 11 ) 1145 - 1152 2007

DOI
Active coordinated operation of distribution network system for many connections of distributed generators

Yasuhiro Hayashi, Shoji Kawasaki, Junya Matsuki, Shinji Wakao, Junpei Baba, Masahide Hojo, Akihiko Yokoyama, Naoki Kobayashi, Takao Hirai, Kohei Oishi

IEEJ Transactions on Power and Energy 127 ( 1 ) 41 - 52 2007

　View Summary

Recently, total number of distributed generators (DGS) such as photovoltaic generation system and wind turbine generation system connected to an actual distribution network increases drastically. The distribution network connected with many distributed generators must be operated keeping reliability of power supply, power quality and loss minimization. In order to accomplish active distribution network operation to take advantage of many connections of DGS, a new coordinated operation of distribution system with many connections of DGS is necessary. In this paper, the authors propose a coordinated operation of distribution network system connected with many DGS by using newly proposed sectionalizing switches control, sending voltage control and computation of available DG connection capability. In order to check validity of the proposed coordinated operation of distribution system, numerical simulations using the proposed coordinated distribution system operation are carried out in a practical distribution network model.

DOI
A fault location method using air-gap fluxes of synchronous generator

Junya Matsuki, Yasuhiro Hayashi, Toshikazu Nakano, Yoichi Funasaki

IEEJ Transactions on Power and Energy 127 ( 3 ) 495 - 501 2007

　View Summary

This paper deals with experimental investigation on a novel fault location method using air-gap flux distributions of a synchronous generator connected to a power system. Air-gap fluxes are the sum of field fluxes and armature reaction fluxes. Changes in armature current and field current at fault contribute directly to the armature reaction fluxes and field fluxes, then resultant air-gap fluxes. Therefore, air-gap fluxes can be utilized to locate fault. Wavelet analysis is applied to induced voltages of search coils which are wound around a stator tooth top for measurement of air-gap flux. It is shown that fault type and location are estimated from the change of search coil voltages measured during fault.

DOI CiNii
Verification of Proposed Active Operation of Power Grid with PV Systems by Scaled-down Distribution Network Equipment

Y.Hayashi, S.Sakai, J.Matuki, Y.Fuwa, K.Mori

Proceedings of 17th International Photovoltaic Science and Engineering Conference 2007
Study on Optimal Allocation and Gain of Active Filter Considering Distribution Network Configuration

S.Kawasaki, Y.Hayashi, J.Matuki, H.Kikuya, M.Hojo

Proceedings of the International Conference on Electrical Engineering 2007 2007
Simultaneous Determination Method of Control Parameters of Voltage Regulators Installed in Radial Distribution Network Using Measurement Data

Y.Hayashi, Y.Hanai, J.Matuki, K.Mori, Y.Fuwa

Proceedings of IEEJ-EIT Joint Symposium on Advanced Technology in Power Systems 2007
Seasonal Change of Power Quality Based on Real Data at the Distribution System of Fukui University Campus

J.Matuki, Y.Hayashi, S.Kawasaki, A.Ito

Proceedings of the International Conference on Electrical Engineering 2007 2007
Power and heat interchange system using fuel cells in collective housing

Y. Hayashi, S. Kawasaki, T. Funabashi, Y. Okuno

2007 POWER CONVERSION CONFERENCE - NAGOYA, VOLS 1-3 1174 - + 2007

　View Summary

A power and heat interchange system with fuel cells in collective housings is proposed. A solution method for determining optimal FC operation plan is proposed. From numerical simulations it is confirmed that fuel cells are effectively used by interchanging power and heat in a collective housing.

DOI
Multi-objective Evaluation of Radial and Loop Distribution Network Configuration Using Distribution Network Equipment

Y.Hayashi, S.Kawasaki, J.Matuki, S.Sakai, Y.Fuwa, K.Mori

Proceedings of IEEJ-EIT Joint Symposium on Advanced Technology in Power Systems 95 - 100 2007
Evaluation of Reduced CO2 Emissions by Distribution Loss Minimization in Japanese Distribution System

Y.Hayashi, J.Matuki, H.Takano, M.Yokoyama

Proceedings of the International Conference on Electrical Engineering 2007 2007
Development of Computation Method to Determine Optimal Setting Value for LDC Voltage Controller Using Measured Information

Y.Hayashi, Y.Hanai, J.Matuki, N.Kobayashi, K.Oishi

Proceedings of the International Conference on Electrical Engineering 2007 2007
Determination Method of Optimal Operation Schedule for Power and Heat Interchange System using Fuel Cells in Collective Housing

Y.Hayashi, S.Kawasaki, J.Matuki, T.Funabashi, Y.Okuno, T.Hayashi

Proceedings of IEEJ-EIT Joint Symposium on Advanced Technology in Power Systems 101 - 106 2007
Decision Method of Optimal 24-Hours Sending Voltage Profile in Distribution Network with PV Systems

Y.Hayashi, Y.Hanai, J.Matuki, Y.Fuwa, K.Mori

Proceedings of 17th International Photovoltaic Science and Engineering Conference 2007
Basic Study on Optimal Smoothing Time Constant of Wind Power Generation System with Storage Battery to Inhibit Voltage Flunctuation in Distribution Network

Y.Hayashi, S.Kawasaki, J.Matuki, T.Nomura

Proceedings of the International Conference on Electrical Engineering 2007 2007
Active coordinated Operation of Distribution Network with Distributed Generators

Y.Hayashi, S.Kawasaki, J.Matuki, S.Sakai, J.Baba, A.Yokoyama, M.Hojo, S.Wakao, N.Kobayashi, K.Oishi

Proceedings of the International Conference on Electrical Engineering 2007 2007
Verification of Proposed Active Operation of Power Grid with PV Systems by Scaled-down Distribution Network Equipment

Y.Hayashi, S.Sakai, J.Matuki, Y.Fuwa, K.Mori

Proceedings of 17th International Photovoltaic Science and Engineering Conference 2007
Study on Optimal Allocation and Gain of Active Filter Considering Distribution Network Configuration

S.Kawasaki, Y.Hayashi, J.Matuki, H.Kikuya, M.Hojo

Proceedings of the International Conference on Electrical Engineering 2007 2007
Simultaneous Determination Method of Control Parameters of Voltage Regulators Installed in Radial Distribution Network Using Measurement Data

Y.Hayashi, Y.Hanai, J.Matuki, K.Mori, Y.Fuwa

Proceedings of IEEJ-EIT Joint Symposium on Advanced Technology in Power Systems 2007
Seasonal Change of Power Quality Based on Real Data at the Distribution System of Fukui University Campus

J.Matuki, Y.Hayashi, S.Kawasaki, A.Ito

Proceedings of the International Conference on Electrical Engineering 2007 2007
Power and heat interchange system using fuel cells in collective housing

Y. Hayashi, S. Kawasaki, T. Funabashi, Y. Okuno

2007 POWER CONVERSION CONFERENCE - NAGOYA, VOLS 1-3 1174 - + 2007

　View Summary

A power and heat interchange system with fuel cells in collective housings is proposed. A solution method for determining optimal FC operation plan is proposed. From numerical simulations it is confirmed that fuel cells are effectively used by interchanging power and heat in a collective housing.

DOI
Online Optimization Method for Operation of Generators in a Micro Grid

Y.Hayashi, H.Miyamoto, J.Matuki, T.Iizuka, H.Azuma

Proceedings of the International Conference on Electrical Engineering 2007 2007
Multi-objective Evaluation of Radial and Loop Distribution Network Configuration Using Distribution Network Equipment

Y.Hayashi, S.Kawasaki, J.Matuki, S.Sakai, Y.Fuwa, K.Mori

Proceedings of IEEJ-EIT Joint Symposium on Advanced Technology in Power Systems 95 - 100 2007
Evaluation of Reduced CO2 Emissions by Distribution Loss Minimization in Japanese Distribution System

Y.Hayashi, J.Matuki, H.Takano, M.Yokoyama

Proceedings of the International Conference on Electrical Engineering 2007 2007
Development of Computation Method to Determine Optimal Setting Value for LDC Voltage Controller Using Measured Information

Y.Hayashi, Y.Hanai, J.Matuki, N.Kobayashi, K.Oishi

Proceedings of the International Conference on Electrical Engineering 2007 2007
Determination Method of Optimal Operation Schedule for Power and Heat Interchange System using Fuel Cells in Collective Housing

Y.Hayashi, S.Kawasaki, J.Matuki, T.Funabashi, Y.Okuno, T.Hayashi

Proceedings of IEEJ-EIT Joint Symposium on Advanced Technology in Power Systems 101 - 106 2007
Decision Method of Optimal 24-Hours Sending Voltage Profile in Distribution Network with PV Systems

Y.Hayashi, Y.Hanai, J.Matuki, Y.Fuwa, K.Mori

Proceedings of 17th International Photovoltaic Science and Engineering Conference 2007
Basic Study on Optimal Smoothing Time Constant of Wind Power Generation System with Storage Battery to Inhibit Voltage Flunctuation in Distribution Network

Y.Hayashi, S.Kawasaki, J.Matuki, T.Nomura

Proceedings of the International Conference on Electrical Engineering 2007 2007
Active coordinated Operation of Distribution Network with Distributed Generators

Y.Hayashi, S.Kawasaki, J.Matuki, S.Sakai, J.Baba, A.Yokoyama, M.Hojo, S.Wakao, N.Kobayashi, K.Oishi

Proceedings of the International Conference on Electrical Engineering 2007 2007
Integrated method of determining transmission and distribution loss-minimum network configurations

Yasuhiro Hayashi, Hirotaka Takano, Junya Matsuki

IEEJ TRANSACTIONS ON ELECTRICAL AND ELECTRONIC ENGINEERING 1 ( 3 ) 216 - 225 2006.09

　View Summary

In Japan, the secondary transmission system (66 kV, 77 kV) and distribution system (6.6 kV) with loop structures are operated using the radial configuration. The transmission and distribution network configurations must be determined so as to keep the radial configuration and satisfy the operational constraints such as line capacity, voltage drop, and so on. However, the configuration candidates are too many, and it is not easy to determine transmission and distribution loss-minimum network configurations comprehensively. In this paper, the authors propose an integrated method of determining the transmission and distribution loss-minimum network configurations under the operational constraints within practical computation time. In order to check the validity of the proposed method of determination, numerical simulations using the proposed method are carried out for a real-scale Japanese transmission and distribution network model with 2(2098) configuration candidates. (c) 2006 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

DOI
配電系統と分散型電源への最適化技術の適用 (電力ソリューション特集) -- (最適化技術の適用)

林泰弘, 舟橋俊久, 奥野義道

明電時報 2006 ( 4 ) 71 - 74 2006.07

CiNii
分散型電源連系配電ネットワークの標準解析モデルの構築とネットワーク構成候補の多面的評価手法の開発

林泰弘, 川崎章司, 松木純也, 松田浩明, 酒井重和, 宮崎輝, 小林直樹

電気学会論文誌B 126 ( 10 ) 1013 - 1022 2006

DOI CiNii
分散型電源の地点別時間別連系可能最大出力の算定

林泰弘, 花井悠二, 松木純也, 細川慎平, 小林直樹

電気学会論文誌B 126 ( 10 ) 1023 - 1031 2006

DOI CiNii
配電系統のバンク事故による分散型電源の一斉解列を考慮した事故復旧手法

高野裕貴, 林泰弘, 松木純也, 小林直樹

電気学会論文誌B 126 ( 3 ) 336 - 346 2006

DOI CiNii
配電系統のバンク事故による分散型電源の一斉解列を考慮した事故復旧手法

松木純也, 林泰弘, 北島俊介, 高橋雅浩, 村田憲治

電気学会論文誌B 126 ( 6 ) 605 - 610 2006

DOI
Experimental study on the unified power flow controller

Junya Matsuki, Yasuhiro Hayashi, Shunsuke Kitajima, Masahiro Takahashi, Kenji Murata

IEEJ Transactions on Power and Energy 126 ( 6 ) 605 - 610 2006

　View Summary

This paper presents the results of experimental study on the performance of a Unified Power Plow Controller (UPFC), one of the FACTS (Flexible AC Transmission Systems) controllers. A laboratory-scale UPFC was manufactured and installed on a laboratory electric power system to investigate its multifunctional capabilities as a power flow controller. The UPFC consists of two 4.5 kVA, 200 V back-to-back voltage-sourced converters, labeled "Converter 1" and "Converter 2", operated from a common DC link provided by a DC storage capacitor of 380 V. It can provide independent control of both the real and reactive power flow in the line. Tests were performed to examine the capabilities of UPFC, under one-machine connected to an infinite-bus system. Steady-state responses under various kinds of operating conditions were measured and analyzed.

DOI CiNii
数理的最適性が保証された3分割3連系配電損失最小構成の決定手法

林泰弘, 松木純也, 石川伸二, 高野裕貴, 武藤英司, 小林直樹

電気学会論文誌B 126 ( 5 ) 516 - 524 2006

DOI CiNii
Optimal Grid Voltage Control in Distribution Feeder Connected with PV systems

Yasuhiro Hayashi, Junya Matsuki, Shoji Kawasaki, Shinpei Hosokawa, Naoki Kobayashi

CONFERENCE RECORD OF THE 2006 IEEE 4TH WORLD CONFERENCE ON PHOTOVOLTAIC ENERGY CONVERSION, VOLS 1 AND 2 2327 - + 2006

　View Summary

The authors propose a new grid voltage control scheme to determine the optimal sending voltage profile so as to minimize total number of tap position changes per day under constraints of acceptable voltage limit for distribution feeders with photovoltaic systems (PVs). In order to verify the validity of the proposed grid voltage control scheme for multiple PV connections, numerical examples for a grid model with PV were shown.

DOI
Multi Evaluation of Distribution Network Configuration Candidates

S.Kawasaki, Y.Hayashi, J.Matuki, H.Matsuda, S.Sakai, T.Miyazaki, N.Kobayashi

Proc. of ICEE2006 International Conference on Electrical Engineering 2006
Evaluation of Available Maximum Output of Distributed Generator Connected to Distribution System

S.Kawasaki, Y.Hayashi, J.Matuki, S.Hosokawa, N.Kobayashi

Proc. of ICEE2006 International Conference on Electrical Engineering 2006
Effective Enumeration Method of Determine Loss Mimimum Distribution Network Configuration

Hirotaka Takano, Yasuhiro Hayashi, Junya Matsuki, Naoki Kobayashi

Proc. of ICEE 2006 International Conference on Electrical Engineering 2006
Determination of the Optimal Restoration Configuration Based on Enumeration Method

Hirotaka Takano, Yasuhiro Hayashi, Junya Matsuki, Naoki Kobayashi

Proc. of ICEE 2006 International Conference on Electrical Engineering 2006
Acceptable Maximum Output of Potential Renewable Energy Sources for a Distribution Feeder

Y.Hayashi, J.Matsuki, Y.Hanai, N.Kobayashi, T.Hirai, K.Ohishi

Proc. of Renewable Energy 2006 2006
Optimal Grid Voltage Control in Distribution Feeder Connected with PV systems

Yasuhiro Hayashi, Junya Matsuki, Shoji Kawasaki, Shinpei Hosokawa, Naoki Kobayashi

CONFERENCE RECORD OF THE 2006 IEEE 4TH WORLD CONFERENCE ON PHOTOVOLTAIC ENERGY CONVERSION, VOLS 1 AND 2 2327 - + 2006

　View Summary

The authors propose a new grid voltage control scheme to determine the optimal sending voltage profile so as to minimize total number of tap position changes per day under constraints of acceptable voltage limit for distribution feeders with photovoltaic systems (PVs). In order to verify the validity of the proposed grid voltage control scheme for multiple PV connections, numerical examples for a grid model with PV were shown.

DOI
Multi Evaluation of Distribution Network Configuration Candidates

S.Kawasaki, Y.Hayashi, J.Matuki, H.Matsuda, S.Sakai, T.Miyazaki, N.Kobayashi

Proc. of ICEE2006 International Conference on Electrical Engineering 2006
Integrated Determination Method of Transmission and Distribution Loss-minimum Network Configuration

Yasuhiro Hayashi, Hirotaka Takano, Junya Matsuki

IEEJ Transactions on Electrical and Electronic Engineering 1 ( 3 ) 216 - 225 2006
Evaluation of Available Maximum Output of Distributed Generator Connected to Distribution System

S.Kawasaki, Y.Hayashi, J.Matuki, S.Hosokawa, N.Kobayashi

Proc. of ICEE2006 International Conference on Electrical Engineering 2006
Effective Enumeration Method of Determine Loss Mimimum Distribution Network Configuration

Hirotaka Takano, Yasuhiro Hayashi, Junya Matsuki, Naoki Kobayashi

Proc. of ICEE 2006 International Conference on Electrical Engineering 2006
Determination of the Optimal Restoration Configuration Based on Enumeration Method

Hirotaka Takano, Yasuhiro Hayashi, Junya Matsuki, Naoki Kobayashi

Proc. of ICEE 2006 International Conference on Electrical Engineering 2006
Acceptable Maximum Output of Potential Renewable Energy Sources for a Distribution Feeder

Y.Hayashi, J.Matsuki, Y.Hanai, N.Kobayashi, T.Hirai, K.Ohishi

Proc. of Renewable Energy 2006 2006
Power system harmonic analysis using state-estimation method for Japanese field data

N Kanao, M Yamashita, H Yanagida, M Mizukami, Y Hayashi, J Matsuki

IEEE TRANSACTIONS ON POWER DELIVERY 20 ( 2 ) 970 - 977 2005.04

　View Summary

The harmonic state-estimation (HSE) method appears to be effective but its applicability has yet been fully verified using actual data in power systems. Particularly in Japan, there has been no verification of the applicability of the method in actual power systems. In this paper, for Japanese field data synchronized with a Global Positioning System (GPS) clock, a practical method for power system harmonic analysis is proposed, which is based on HSE. In the proposed method, in order to improve the precision of HSE, uncertain parameters R, X, and Y of the transmission lines are determined from measured fundamental data, and bad measured harmonic data excluded systematically. It is also possible to estimate the error of each measurement instrument by using HSE. It is confirmed that by using only partial and selected measurement data synchronized with a GPS clock, the entire harmonic distribution of the actual power system has been obtained effectively. In this paper, field-test results of the HSE on an actual Japanese power system are shown. Furthermore, an example of harmonic analysis based on HSE in the actual power system is presented, which is prediction of harmonic voltage distribution after a change of the actual power system configuration.

DOI CiNii
Power system harmonic analysis using state-estimation method for Japanese field data

N Kanao, M Yamashita, H Yanagida, M Mizukami, Y Hayashi, J Matsuki

IEEE TRANSACTIONS ON POWER DELIVERY 20 ( 2 ) 970 - 977 2005.04

　View Summary

The harmonic state-estimation (HSE) method appears to be effective but its applicability has yet been fully verified using actual data in power systems. Particularly in Japan, there has been no verification of the applicability of the method in actual power systems. In this paper, for Japanese field data synchronized with a Global Positioning System (GPS) clock, a practical method for power system harmonic analysis is proposed, which is based on HSE. In the proposed method, in order to improve the precision of HSE, uncertain parameters R, X, and Y of the transmission lines are determined from measured fundamental data, and bad measured harmonic data excluded systematically. It is also possible to estimate the error of each measurement instrument by using HSE. It is confirmed that by using only partial and selected measurement data synchronized with a GPS clock, the entire harmonic distribution of the actual power system has been obtained effectively. In this paper, field-test results of the HSE on an actual Japanese power system are shown. Furthermore, an example of harmonic analysis based on HSE in the actual power system is presented, which is prediction of harmonic voltage distribution after a change of the actual power system configuration.

DOI CiNii
分散型電源が連系された配電系統における最適送出し電圧の決定手法

林泰弘, 松木純也, 鈴木良治, 武藤英司

電気学会論文誌B 125 ( 9 ) 846 - 854 2005

DOI CiNii
Computation Method to Improve Three-phase Voltage Imbalance by Exchange of Single-phase Load Connection

Yasuhiro Hayashi, Junya Matsuki, Masayoshi Ohashi, Yasuyuki Tada

IEEJ Transactions on Power and Energy 125 ( 4 ) 365 - 372 2005

　View Summary

Three-phase voltage imbalance occurs by variety of connecting points of single-phase loads. In order to improve three-phase voltage imbalance, connecting points of single-phases loads are exchanged. System planner has to decide how to exchange connection of single-phase loads with the minimum planning cost in order to improve three-phase voltage imbalance. However, since there are many patterns of connection for single-phase loads, it is not easy to determine the optimal connection pattern for single-phase loads with the minimum planning cost under the constraint for improving voltage imbalance. In this paper, authors propose a computational method to support the planner's decision of single-phase loads connection systematically. The proposed method, which is based on effective enumeration algorithm, can obtain the optimal single-phase loads connection pattern, which satisfies with constraint of voltage balance and has the minimum total number of single-phase loads exchanged from previous single-phase loads connection. In the proposed method, three-phase iterative load flow calculation is applied to calculate rate of three-phase voltage imbalance. Three-phase iterative load flow calculation has two simple procedures: (Procedurel) addition of load currents from terminal node of feeder to root one, and (Procedure2) subtraction of voltage drop from root node of feeder to terminal one. In order to check the validity of the proposed method, numerical results are shown for a distribution system model with DG. © 2005, The Institute of Electrical Engineers of Japan. All rights reserved.

DOI CiNii
An Estimation Method of Load Model Parameters for Harmonic Analysis

Yasuhiro Hayashi, Junya Matsuki, Kenichi Kobayashi, Norikazu Kanao

IEEJ Transactions on Power and Energy 125 ( 10 ) 939 - 947 2005

　View Summary

In order to devise countermeasures for harmonic disturbances and harmonic suppression in power systems effectively, it is necessary to develop a harmonic analysis approach with high accuracy. The major harmonic analysis approach is to recreate harmonic distribution in a power system model by using a simulation method. However, in order to carry out high accuracy estimation of the harmonic distribution using the simulation method, after creating a load model which consists of several parameters associated with the measured harmonic impedance, the optimal load model parameters must be determined. So far, appropriate load model parameters have been determined by trial and error. Therefore, a systematic approach to determine the optimal load model parameters is needed to estimate the measured harmonic impedance with high accuracy. In this paper, a determination method for the optimal load model parameters to estimate the measured harmonic impedance is proposed. The proposed method is based on Particle Swarm Optimization (PSO), which is one of optimization methods by using concept of swarm intelligence. In order to check the validity of the proposed method, the load model parameters estimated by the proposed method are evaluated using test data and filed data of Hokuriku electric power company. © 2005, The Institute of Electrical Engineers of Japan. All rights reserved.

DOI
Conceptual Study on Autonomy-Enhanced PV Clusters for Urban Community to Meet The Japanese PV2030

K.Kurokawa, S.Wakao, Y.Hayashi, I.Ishii, K.Otani, M.Yamaguchi, Y.Ono

EU-PVSEC 2005
Conceptual Study on Autonomy-Enhanced PV Clusters for Urban Community to Meet The Japanese PV2030

K.Kurokawa, S.Wakao, Y.Hayashi, I.Ishii, K.Otani, M.Yamaguchi, Y.Ono

EU-PVSEC 2005
Loss Minimum Configuration of Distribution System Considering N-1 Security of Dispersed Generators

Yasuhiro Hayashi, Junya Matsuki

IEEE Transactions on Power Systems 19 ( 1 ) 636 - 642 2004.02

　View Summary

Dispersed generators (DGs), such as fuel cells and solar cells, etc., are going to be installed in the demand side of power systems. The dispersed facilities can reduce distribution system loss by the appropriate allocation. However, when a DG that has a large capacity is disconnected from a distribution network by fault, violation of operational constraints, such as line current capacity and voltage drop, may occur. From a viewpoint of system reliability, robust system configuration for suddenly disconnecting DG from the distribution network must be determined, since system operators cannot control DG connection to the distribution network online. In this paper, the authors propose an algorithm to determine loss minimum configuration of a distribution system with DGs while maintaining system reliability. Namely, in the proposed algorithm, N-1 contingencies for DGs are considered as an operational constraint, when the loss minimum configuration is determined under the constraints for line current capacity and voltage drop. In order to determine the loss minimum configuration effectively, an algorithm based on tabu search with strategic oscillation is proposed. Numerical simulations are carried out for a distribution system model with 118 sectionalizing switches in order to examine the validity of the proposed algorithm in comparison with the conventional approach.

DOI CiNii
Loss minimum configuration of distribution system considering N-1 security of dispersed generators

Y Hayashi, J Matsuki

IEEE TRANSACTIONS ON POWER SYSTEMS 19 ( 1 ) 636 - 642 2004.02

　View Summary

Dispersed generators (DGs), such as fuel cells and solar cells, etc., are going to be installed in the demand side of power systems. The dispersed facilities can reduce distribution system loss by the appropriate allocation. However, when a DG that has a large capacity is disconnected from a distribution network by fault, violation of operational constraints, such as line current capacity and voltage drop, may occur. From a viewpoint of system reliability, robust system configuration for suddenly disconnecting DG from the distribution network must be determined, since system operators cannot control DG connection to the distribution network online. In this paper, the authors propose an algorithm to determine loss minimum configuration of a distribution system with DGs while maintaining system reliability. Namely, in the proposed algorithm, N-1 contingencies for DGs are considered as an operational constraint, when the loss minimum configuration is determined under the constraints for line current capacity and voltage drop. In order to determine the loss minimum configuration effectively, an algorithm based on tabu search with strategic oscillation is proposed. Numerical simulations are carried out for a distribution system model with 118 sectionalizing switches in order to examine the validity of the proposed algorithm in comparison with the conventional approach.

DOI CiNii
Overload Elimination of Secondary Power System by Load Transfer of Distribution System

H.Takano, Y.Hayashi, J.Matuki

ICEE2004/APCOT MNT2004 OD7-2 192 - 195 2004
Overload Elimination of Secondary Power System by Load Transfer of Distribution System

H.Takano, Y.Hayashi, J.Matuki

ICEE2004/APCOT MNT2004 OD7-2 192 - 195 2004
Distribution System Planning Evaluation Method Using Voronoi Diagram and Tabu Search

Yasuhiro Hayashi, Junya Matsuki, Masaki Nose, Masatomo Inui

IEEJ Transactions on Power and Energy 123 ( 10 ) 1124 - 1132 2003

　View Summary

Distribution planning must be carried out by considering (1) geographic information such as allocation of loads and feeders, (2) operational conditions such as line current capacity, voltage drop limit and distribution loss, and (3) facility cost and so on. In order to systematically support the above work by computational approach, optimization techniques are available. In this paper, a computational method to support distributional planning systematically is proposed by introducing (1) geographical optimization technique and (2) configuration optimization technique. The geographical optimization is to determine which of sectionalized lines should supply power to future appeared loads so as to maximize availability ratio of feeders. The configuration optimization is to determine states of sectionalizing switches (opened or closed) so as to minimize distribution loss under the constraints such as the line current capacity, voltage drop limit and radial structure. In the proposed method, after the geographical optimization is carried out to determine future section loads, operational conditions are evaluated by the configuration optimization. If the operational constraints are not satisfied, previously prepared expansion plan candidates are evaluated quantitatively, and then the best candidate is decided. Voronoi diagram is applied to realize the geographical optimization, and tabu search is used to accomplish the configuration optimization. In order to check the validity of the proposed method, numerical results are shown for a distribution system model. © 2003, The Institute of Electrical Engineers of Japan. All rights reserved.

DOI CiNii
分散型電源のn-1解列を考慮した配電損失最小構成の決定手法

林泰弘, 松木純也, 高野浩貴

電気学会論文誌B 122-B ( 12 ) 1376 - 1383 2002
電気学会地域供給系統モデルにおける線路損失最小系統構成の算出

林泰弘, 松木純也, 栗原郁夫

電気学会論文誌Ｂ 122-B巻 ( 10号 ) 1082 - 1088 2002
Thyristor Controlled Series Capacitor for Damping Power System Oscillations

J.Matsuki, Y.Hayashi, S.Hasegawa

Proc. of IASTED International Conference on Power and Energy Systems, Los Angeles, USA, 173-177 2002
PPSの系統参入に対する同時送電可能容量（STC）の計算手法

林泰弘, 松木純也, 池田孝之

電気学会論文誌B, 122-B, 12, 1366-1375 2002
Experimental Study on the Unified Power Flow Controller

J.Matuki, Y.Hayashi, S.Kitajima

Proc. of International Conference on Electrical Engineering(ICEE), Cheju, Korea,2097-2102 2002
Determination of Optimal System Configuration for Japanese Power System Model

Y.Hayashi, J.Matsuki

Proc. of IEEE/PES Transmission and Distribution Conference and Exhibition 2002, Yokohama, Japan, 220-225 2002
Determination of Loss-minimum Distribution System’s Configuration

Y.Hayashi, J.Matsuki

Proc. of International Conference on Electrical Engineering(ICEE), Cheju, Korea, 257-261 2002
Thyristor Controlled Series Capacitor for Damping Power System Oscillations

J.Matsuki, Y.Hayashi, S.Hasegawa

Proc. of IASTED International Conference on Power and Energy Systems, Los Angeles, USA, 173-177 2002
Experimental Study on the Unified Power Flow Controller

J.Matuki, Y.Hayashi, S.Kitajima

Proc. of International Conference on Electrical Engineering(ICEE), Cheju, Korea,2097-2102 2002
Determination of Optimal System Configuration for Japanese Power System Model

Y.Hayashi, J.Matsuki

Proc. of IEEE/PES Transmission and Distribution Conference and Exhibition 2002, Yokohama, Japan, 220-225 2002
Determination of Loss-minimum Distribution System’s Configuration

Y.Hayashi, J.Matsuki

Proc. of International Conference on Electrical Engineering(ICEE), Cheju, Korea, 257-261 2002
ROBDDを用いた地方供給系統の最適構成決定手法

林泰弘, 松木純也, 奈良宏一

電気学会論文誌B, 121-B, 2, 172-178 2001
Evaluation method of electrical power congestion possibility in open market system

K Nara, Y Hayashi, C Takahashi, T Shirasaki, H Sato

PSAM 5: PROBABILISTIC SAFETY ASSESSMENT AND MANAGEMENT, VOLS 1-4 ( 34 ) 447 - 452 2000

　View Summary

In recent years, in Japan, electrical power market is partly open to the public, and many generators of power sellers or independent power producers (IPPs), etc. are going to be connected to the electrical power systems. Retail sale of electricity is also opened in a large consumers' market, and power wheeling, for instance, from IPPs to their customers, can be requested to power transmission networks. Normally, these power sources are connected to the power transmission system regardless of its transmission capability or characteristics. Therefore, a power company must examine the transmission capability of his network whenever connection of new power resources or wheeling is requested. Moreover, the most economical power resource dispatch is also required since the power company has its own generators in his network. Namely, in the open market, they must determine the price. of requested power wheeling and the price of power to be purchased according to its connection point through taking power transmission congestion and reliability into consideration.
From the above background, in this paper, the authors propose an evaluation method of electrical power congestion possibility in the open market circumstances by using the operational constraint violations of the system. In this method, congestion possibility of each operating profile is evaluated by using an expected value of such constraint violations as line capacity and voltage drop (rise) of the pre-determined contingency cases.
In this paper, the problem is defined and formulated in Chapter 1, and the solution algorithm by using discrete optimal power flow is illustrated in Chapter 2. Some numerical examples are shown in Chapter 3.
配電損失最小化を目的とした分散型電源の最適配置

奈良宏一, 林泰弘, テンビン, 池田一成, 芦沢友雄

電気学会論文誌B, 120-B, 5, 672-677 2000
Loss Minimum Re-configuration of Distribution Systems with Dispersed Generators

K.Nara, Y.Hayashi, K.Ikeda, T.Ashizawa

Proc. of International Conference on Electrical Engineering(ICEE2K), 560-563 2000
Evaluation method of electrical power congestion possibility in open market system

K Nara, Y Hayashi, C Takahashi, T Shirasaki, H Sato

PSAM 5: PROBABILISTIC SAFETY ASSESSMENT AND MANAGEMENT, VOLS 1-4 ( 34 ) 447 - 452 2000

　View Summary

In recent years, in Japan, electrical power market is partly open to the public, and many generators of power sellers or independent power producers (IPPs), etc. are going to be connected to the electrical power systems. Retail sale of electricity is also opened in a large consumers' market, and power wheeling, for instance, from IPPs to their customers, can be requested to power transmission networks. Normally, these power sources are connected to the power transmission system regardless of its transmission capability or characteristics. Therefore, a power company must examine the transmission capability of his network whenever connection of new power resources or wheeling is requested. Moreover, the most economical power resource dispatch is also required since the power company has its own generators in his network. Namely, in the open market, they must determine the price. of requested power wheeling and the price of power to be purchased according to its connection point through taking power transmission congestion and reliability into consideration.
From the above background, in this paper, the authors propose an evaluation method of electrical power congestion possibility in the open market circumstances by using the operational constraint violations of the system. In this method, congestion possibility of each operating profile is evaluated by using an expected value of such constraint violations as line capacity and voltage drop (rise) of the pre-determined contingency cases.
In this paper, the problem is defined and formulated in Chapter 1, and the solution algorithm by using discrete optimal power flow is illustrated in Chapter 2. Some numerical examples are shown in Chapter 3.
Evaluation Method of Electrical Power Congestion Possibility in Open Market System

K.Nara, Y.Hayashi, C.Takahashi, T.Shirasaki, H.Sato

Proc. of the 5th International Conference on Probabilistic Safety Assessment and Management(PSAM5), 447-452 2000
Loss Minimum Re-configuration of Distribution Systems with Dispersed Generators

K.Nara, Y.Hayashi, K.Ikeda, T.Ashizawa

Proc. of International Conference on Electrical Engineering(ICEE2K), 560-563 2000
Evaluation method of electrical power congestion possibility in open market system

K Nara, Y Hayashi, C Takahashi, T Shirasaki, H Sato

PSAM 5: PROBABILISTIC SAFETY ASSESSMENT AND MANAGEMENT, VOLS 1-4 ( 34 ) 447 - 452 2000

　View Summary

In recent years, in Japan, electrical power market is partly open to the public, and many generators of power sellers or independent power producers (IPPs), etc. are going to be connected to the electrical power systems. Retail sale of electricity is also opened in a large consumers' market, and power wheeling, for instance, from IPPs to their customers, can be requested to power transmission networks. Normally, these power sources are connected to the power transmission system regardless of its transmission capability or characteristics. Therefore, a power company must examine the transmission capability of his network whenever connection of new power resources or wheeling is requested. Moreover, the most economical power resource dispatch is also required since the power company has its own generators in his network. Namely, in the open market, they must determine the price. of requested power wheeling and the price of power to be purchased according to its connection point through taking power transmission congestion and reliability into consideration.
From the above background, in this paper, the authors propose an evaluation method of electrical power congestion possibility in the open market circumstances by using the operational constraint violations of the system. In this method, congestion possibility of each operating profile is evaluated by using an expected value of such constraint violations as line capacity and voltage drop (rise) of the pre-determined contingency cases.
In this paper, the problem is defined and formulated in Chapter 1, and the solution algorithm by using discrete optimal power flow is illustrated in Chapter 2. Some numerical examples are shown in Chapter 3.
Tabu Search Algorithm for Loss Minimum DG Allocation

K.Nara, Y.Hayashi

Proc. of IEEE International Conference on Intelligent Systems Applications to Power Systems Proceedings(ISAP), pp.180-184 1999
Operational Simulation of Flexible, Reliable and Intelligent Electrical Energy Delivery System Using PSCAD/EMTDC

J.Hasegawa, H.Kita, Y.Mishima, K.Nara, Y.Hayashi

Proc. of American Power Conference, pp.518-523 1999
Discrete Optimal Power Flow by Tabu Search

K.Nara, Hua Hu, Y.Hayashi

Proc. of International Conference on Electrical Engineering(ICEE), pp.20-23, 1999
Determination of Optimal Secondary Power System Configuration Using Reduced Ordered Binary Decision Diagram

Y.Hayashi, K.Nara

Proc. of International Conference on Electrical Engineering(ICEE), pp.127-130, 1999
A Solution Algorithm Based on Multi-stage Tabu Search for Nested Combinatorial Optimization Problem

K.Nara, Y.Hayashi

Proc. of IEEE Systems, Man and Cybernetics Conference (SMC) 551 - 556 1999
Tabu Search Algorithm for Loss Minimum DG Allocation

K.Nara, Y.Hayashi

Proc. of IEEE International Conference on Intelligent Systems Applications to Power Systems Proceedings(ISAP), pp.180-184 1999
Operational Simulation of Flexible, Reliable and Intelligent Electrical Energy Delivery System Using PSCAD/EMTDC

J.Hasegawa, H.Kita, Y.Mishima, K.Nara, Y.Hayashi

Proc. of American Power Conference, pp.518-523 1999
Discrete Optimal Power Flow by Tabu Search

K.Nara, Hua Hu, Y.Hayashi

Proc. of International Conference on Electrical Engineering(ICEE), pp.20-23, 1999
Determination of Optimal Secondary Power System Configuration Using Reduced Ordered Binary Decision Diagram

Y.Hayashi, K.Nara

Proc. of International Conference on Electrical Engineering(ICEE), pp.127-130, 1999
A Solution Algorithm Based on Multi-stage Tabu Search for Nested Combinatorial Optimization Problem

K.Nara, Y.Hayashi

Proc. of IEEE Systems, Man and Cybernetics Conference (SMC), pp.551-556, 1999
A new algorithm for distribution feeder expansion planning in urban area

K Nara, Y Hayashi, S Muto, K Tuchida

ELECTRIC POWER SYSTEMS RESEARCH 46 ( 3 ) 185 - 193 1998.09

　View Summary

When feeders are newly expanded in a distribution system, allocation of new feeders, new routes that connect from the new feeders to substations and tie-line routes to other feeders, must be determined so as to minimize installation costs of new facilities under such constraints as load-balancing, current capacity, voltage drop and geographical installation restrictions. However, it is difficult for planners to find the optimal feeder expansion plan among various candidates. In this paper, in order to support planners' decision of feeder expansion planning, the authors propose a method by which the least cost expansion facilities can be obtained through searching all the candidates that satisfy such expansion constraints as voltage drop, as well as geographical installation restrictions. In the proposed method, a dual effective gradient method, the Dijkstra method, the Ford-Fulkerson method and tabu search are employed to obtain a feeder expansion plan. Through numerical examples, the validity of the proposed method is verified. (C) 1998 Elsevier Science S.A. All rights reserved.

DOI CiNii
A new algorithm for distribution feeder expansion planning in urban area

K Nara, Y Hayashi, S Muto, K Tuchida

ELECTRIC POWER SYSTEMS RESEARCH 46 ( 3 ) 185 - 193 1998.09

　View Summary

When feeders are newly expanded in a distribution system, allocation of new feeders, new routes that connect from the new feeders to substations and tie-line routes to other feeders, must be determined so as to minimize installation costs of new facilities under such constraints as load-balancing, current capacity, voltage drop and geographical installation restrictions. However, it is difficult for planners to find the optimal feeder expansion plan among various candidates. In this paper, in order to support planners' decision of feeder expansion planning, the authors propose a method by which the least cost expansion facilities can be obtained through searching all the candidates that satisfy such expansion constraints as voltage drop, as well as geographical installation restrictions. In the proposed method, a dual effective gradient method, the Dijkstra method, the Ford-Fulkerson method and tabu search are employed to obtain a feeder expansion plan. Through numerical examples, the validity of the proposed method is verified. (C) 1998 Elsevier Science S.A. All rights reserved.

DOI CiNii
負荷の離散性を考慮した配電系統負荷バランス問題の近似解法

南基榮, 林泰弘, 奈良宏一

電気学会論文誌Ｂ分冊, Vol.118-B, No.9, pp.983-989, 1998
Scenario Selection by Genetic Algorithm for Evaluating Power Resource Planning

Y.Hayashi, K.Nara

International Journal of Power and Energy System, Vol.18, No.2, pp.142-146, 1998
A Novel Automatic Contingency Selection Algorithm for Dynamic Security Assessment

D.Gan, Y.Hayashi, K.Nara, Z.Du, X.Wang, X.Wang

International Journal of Power and Energy System, Vol.18, No.3, pp.157-160, 1998
Scenario Selection by Genetic Algorithm for Evaluating Power Resource Planning

Y.Hayashi, K.Nara

International Journal of Power and Energy System, Vol.18, No.2, pp.142-146, 1998
A Novel Automatic Contingency Selection Algorithm for Dynamic Security Assessment

D.Gan, Y.Hayashi, K.Nara, Z.Du, X.Wang, X.Wang

International Journal of Power and Energy System, Vol.18, No.3, pp.157-160, 1998
Long term load forecasting using improved recurrent neural network

HAYASHI Y.

The Transactions of the Institute of Electrical Engineers of Japan. B A Publication of Power and Energy Society 113 ( 11 ) p1203 - 1212 1993.11

CiNii

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Industrial Property Rights

圧縮空気貯蔵発電方法

林泰弘

Patent
消費電力推定装置および消費電力推定方法

藤本悠, 林泰弘

Patent
電力管理システム及びプログラム

林泰弘

Patent
配電網構成出力装置、方法、及びプログラム

林泰弘, 竹延祐二

Patent
昼食製造設備における電力供給システム

5662285

林泰弘

Patent
多数台連系した太陽光発電システムの出力抑制回避方法及びその装置

5612417

林泰弘

Patent
配電系統システム

4758375

林泰弘

Patent
分散型電源を配電ネットワークに連系する際の条件を決定する支援システムおよびプログラム

4742238

林泰弘

Patent
分散型電源を配電ネットワークに連系する際の条件を決定する支援システム及び支援方法

4577841

林泰弘

Patent
配電系統構成最適化装置および配電系統構成最適化方法

4424494

林泰弘

Patent

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Awards

The Commendation for Science and Technology by the Minister of Education, Culture, Sports, Science and Technology (Research Category)

2019.04 The Ministry of Education, Culture, Sports, Science and Technology(MEXT)
早稲田大学リサーチアワード（大型研究プロジェクト推進）

2019 早稲田大学
早稲田大学リサーチアワード（大型研究プロジェクト推進）

2018 早稲田大学
早稲田大学リサーチアワード（大型研究プロジェクト推進）

2017.12 早稲田大学
早稲田大学リサーチアワード（大型研究プロジェクト推進）

2016.11 早稲田大学
早稲田大学リサーチアワード（大型研究プロジェクト推進）

2015.11 早稲田大学
早稲田大学リサーチアワード（大型研究プロジェクト推進）

2014.11 早稲田大学
電気学術振興賞論文賞

2008.05 電気学会

Winner：本人他8名
Distinguished Paper Award from the IEE of Japan in 2008

2008.05
電気学会論文賞

2008
平成９年度論文発表賞

1998.10 電気学会
平成７年度論文発表賞

1996.08 電気学会

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Research Projects

Hybrid model analysis method with data model and physical model for automatic energy analysis

Project Year :

2020.04

-

2023.03
Economic and Environmental Evaluation Method and Suitable Location Map for the Bifacial Photovoltaic Modules

Project Year :

2019.04

-

2022.03
未来の電気エネルギー供給携帯のスマーとデザイン研究拠点の形成

共同研究

Project Year :

2010

-

　
次世代送配電系統最適制御技術実証事業

共同研究

Project Year :

2010

-

　
Japan Next-generation Transmission and Distribution Systems Optimal Control Technologies Demonstration Project

Cooperative Research

Project Year :

2010

-

　
Research on Coordinate Voltage control Method Using LRT/SVR and SVC

Project Year :

2008

-

2010

　View Summary

The penetration of distributed generator such as PV systems causes voltage fluctuation and wide voltage gap between voltage rise and voltage drop. These influence occurs exceedance of the proper voltage range in distribution network connected with PV systems. In order to resolve the exceedance of the proper voltage range based on the voltage gap and fluctuation, the author proposed a coordinated voltage control method by LRT, SVR and STATCOM. The proposed method has two functions ; the first function (voltage gap reducing function) is to reduce the voltage gap by centralizing control of LRT and SVR, and the other (voltage smoothing function) is to smooth rapid voltage change by autonomous control of STATCOM
Research on advanced cooperative voltage control using LRT, SVR and SVC

Cooperative Research

Project Year :

2008

-

2010
新エネルギー・産業技術総合開発機構（NEDO）「分散型電源連携配電ネットワークの多目的協調運用シミュレーションとその検証実験に基づいた分散型電源の連携課題解決支援システムのプロトタイプの開発

共同研究

Project Year :

2006

-

2008
RESEARCH FOR EVALUATION METHOD OF FLEXIBILITY OF ELECTRICAL POWER SYSTEMS PLANNING

　View Summary

The purpose of this research is to establish the following methods so as to respond the social needs of rece.ving electrical power without interruptions even under such uncertainties as sudden faults.1. Evaluation method of flexibility of the electrical power systems planning which always be a multi-objective optimization problem,2. A new efficient random scenario creation algorithm,3. Distribution planning method in which fault conditions are taken into consideration.The followings as the reserch result of this research project.1. A new evaluation method of the flexibility of the power systems planning is developed. In the method, the concept of inverse projections of the solutions is used to evaluate the flexibility. The developed algorithm is tested by developing the computer program of the algorithm. More-over, a new flexible generator maintenance scheduling method is established as a by-product of this research.2. A new dfficient random scenario creation algorithm in which the concept of the chaos and the genetic algorithm are used is developed and tested. The adequacy to use the concept of the chaos in creating a random scenario is investigated. However, the clear answer is not found whether the chaos can be used in creating the scenario, so far.3. A new distribution systems planning method in which the fault cases and multi-year planning are taken into account is developed and tested by developing the comoputer program.The above research results are presented in many international and domestic conferences. Some of the fine results are submitted to the transactions of IEE of Japan and IEEE.Some of the results are published in the transactions as shown in the references in the next page
電力システムにおける効果的な設備配置に関する研究

　View Summary

本研究では、配電設備の最適配置の効率的な決定手法の確立を目的とし、その第一段階として、地理情報処理と数理手法に基づく新設配電線の最適位置決定手法を電力会社の協力を得て開発した。また、開発した手法の有用性を検証するために、配電システムの例題モデル上での多く計算を実施し、有効な結果を得ることができた。この研究を通して得られた成果は、電気学会を中心として国内外で口頭発表している。開発手法は、新設配電線の配置の決定を5つの決定問題に分割し、地理情報を用いてグラフ化した各決定問題を数理手法でシーケンシャルに解いていき最適な新設配電線配置を決めるというものである。以下に開発手法が実施する各決定を示す。(決定1)新設架空線の負荷部分の地理的配置の双対有効勾配法による決定(決定2)(決定1)で決定した負荷部分と立ち上がり点とを接続する新設架空線候補の改良ダイクストラ法による決定(決定3)立ち上がり点と変圧器バンクとを接続する新設引き出しケーブル候補の改良ダイクストラ法による決定(決定4)(決定1)、(決定2)で得られた新設架空線候補と新設地中線候補との組合せによる最適な候補(新設配電線の配置)のFord-Fulkerson法による決定(決定5)(決定4)で得られた新設配電線と既存配電系統との連系線経路のタブ-探索による決
ボロノイ図による配電用変電所配置の地理的最適化に関する研究

　View Summary

本研究では、新設配電用変電所の地理的最適配置を数理的にかつ効率的に決定することを目的とし、計算幾何学と地理情報処理という新たな断面からのアプローチであるボロノイ図を導入した新設配電用変電所の最適配置決定手法を開発した。開発した手法では、まず、既設の配電用変電所の電力供給地域を負荷点から変電所までの距離と変電所の容量ならびに負荷密集度を考慮した重み付きボロノイ図で表現し、ボロノイ図が持つ幾何学的性質(最大空白円)を用いてどの変電所からも距離がかなり離れている箇所を新設配電用変電所の配置候補箇所として見つけ出す。続いて、それらの候補箇所に新設配電用変電所を配置した際のボロノイ図をそれぞれ作成し、供給地域の評価を負荷点から変電所までの距離と変電所容量をコストで換算した関数値で行い、最も評価の高かった候補を新設配電所の配置箇所として決定する。なお、開発した手法を用いて多くの数値シミュレーションを行い、その結果より開発手法の有用性を検証した。本研究を通して得られた成果、ならびに、それらに関連した研究成果は、電気学会を中心に国内外で口頭発表している。本研究で開発した手法を用いれば、新設配電用変電所と新設配電線の最適配置を全て計算機上で決定することが可能となるため、総合自動化が急速に進められている配電系統の運用面ならびに計画面からの支援に寄与できると思われる
Research on Evaluation of Dispersed Generations Installed in Distribution Systems

　View Summary

In this research, the followings research results are established for evaluating the effects of such dispersed generators as solar cells and fuel cells installed in distribution systems.1. Development of evaluation method for power supply reliability:A dispersed generator's strategic allocation method for enhancing power supply reliability by using DGs in a fault state is developed. In the method, the power interruption cost is used to evaluate the power supply reliability. That is, the most cost-effective allocation of the dispersed generators (DGs) is determined from both DGs installation and power supply reliability. In the solution algorithm, tabu search is employed. The tabu search is used in the outer loop of the algorithm to determine the size and location of DGs, and is used in the inner loop to determine the optimal operation of DGs for each fault case. In order to reduce the computational burden, the sensitivity of the power interruption cost or approximate calculation of the power interruption cost is also employed. The method is tested through the numerical examples by comparing with the simulated annealing method.2. Development of evaluation method for loss reductionA method for loss reduction by optimally allocating DGs in distribution system is developed which determine the optimal allocation and capacities of DGs for minimizing the distribution system loss. The algorithm is based on the tabu search as above. Further, distribution systems reconfiguration method to minimize distribution losses when DGs are installed in the demand side is developed. The algorithm is based on the branch exchange method. The developed algorithms are tested by using several system models. From these algorithms, various information is found to reduce distribution losses.The above research results are presented in such transactions and conferences proceedings as the transaction of IEE of Japan and international conferences on the relating technology
地方供給電力系統の供給信頼度評価に関する研究

　View Summary

放射状系統構成で運用されている地方供給系統(主として66[kV]系統)は、一部の送電線に対して両端を異なる変電所に連系することにより、供給信頼度を確保している。ところが、そのような送電線数の増加に伴い、遮断器のオンオフによる系統構成の組み合せ数が急増する。そのため、最適な系統構成の決定は専門家でも容易ではない。昨年度までに、単一変圧器事故時に一段負荷切り替えを行なうことにより、供給支障が解消できるような健全時の地方供給系統構成の中で、送電損失が最小となる構成を決定するアルゴリズムとして、二分決定グラフ(Binary Decision Diagram:BDD)に基づく手法を開発した。本年度は、単一変圧器事故時に一段負荷切り替えによっても供給支障が解消できなかった場合でも、短時間過負荷運転(短時間だけ変圧器の定格出力超過を許容する容量での運用)により供給支障の解消ができるように手法を拡張した。すなわち、単一変圧器事故時においても、一段負荷切り替えや短時間過負荷容量での運用により供給支障が解消できるような健全時の系統構成の中から、送電損失最小の構成を決定できるように、BDDに基づく手法を拡張した。BDDに基づく解法は厳密解法であるため、得られた系統構成の最適性が保証される。また、小規模と実規模のモデル系統上で改良手法を用いた数値計算を行ない、最適系統構成に基づく運用により、系統設備の拡充なしで供給信頼性をどれくらいの期間確保できるかを評価した。さらに、従来手法である分枝限定法との計算結果の比較により、開発した手法の高速性を検証した。これらの研究成果は、研究発表欄に示すように、国内外の学会で発表している
分散型電源が連系された配電ネットワークの次世代運用形態に関する研究

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本研究では,最適送出電圧制御との協調を取りながら配電ネットワークの最適構成を決定する手法を開発し,その開発技術を基盤として,分散型電源のフリーアクセス化,供給信頼性の維持,三相不平衡電圧や高調波の低減,三相配電損失の最小化など,次世代の配電ネットワークに課せられる課題を解決できる最適な運用形態を構築した。最適な運用形態の構築にあたっては様々な運用形態を立案し,各案に対して供給信頼性,三相電圧不平衡,高調波,三相配電損失などを時々刻々変化する需要断面ごとに定量的に解析・評価することで,最も妥当な運用形態案を選出する方法を採用した。また,様々な運用形態案ごとに,供給信頼性,三相不平衡電圧,高調波,配電損失などを解析・評価する手法も開発した。一方,多数台の分散型電源の連系による複雑化した面的な広がりを持つ配電ネットワーク構成を配電損失面や電力品質面から評価することを目的として,三相不平衡負荷や時間による負荷の変動など,実データに基づいた3分割3連系配電ネットワークの標準解析モデルを構築し,膨大に存在する分散型電源が連系された配電ネットワーク構成候補の中から配電損失面,電圧歪率面,電圧不平衡率面,ならびに総合バランス面から見た構成候補の多面的評価を行うための評価方法を提案した。提案手法では,膨大な配電ネットワーク構成候補の中から,配電損失の面で優れた上位の構成候補だけを絞り込み,それらの中から電圧歪率と電圧不平衡率が許容範囲を満足する候補の(1)配電損失,(2)電圧歪率,(3)電圧不平衡率をそれぞれ0から1に正規化した上で3次元(三角形)のレーダーチャートで多面的に評価する。レーダーチャートで配電ネットワーク構成候補を評価することで,各評価軸の長さが短く,三角形の面積が小さいほど,構成候補が多面的に優れていることを視覚的に提示できる。なお,提案方法の妥当性を検証するために,構築した配電ネットワーク標準解析モデル上で多面的な評価を行った
Configuration of Multi-Agent Based Self-Healing Electric Power System and Its Operation

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Multi-Agent based self-healing electric power system has been proposed in this study. Several different types of agents is required for the configuration of the proposed self-healing system such as supervisor agents for making decisions, monitoring agents for distributing required information to the supervisor agents, control agents for activating specified control actions following the commands from the supervisor agents, and so on. The proposed agent system is set up on the computer networks to investigate the efficiency of the proposed distribution scheme of required information to the supervisor agents. The file sharing system and the TCP/IP protocol based communication system has been proposed. The influence of the communication delay time has also been investigated to have the better performance under existing communication delay.As a typical example of the application of the proposed agent system, a rule based voltage and power flow management system has beer proposed including the decision making process for the selection of control devices located in the study system. In this study, a distance measure has been proposed for the selection of control devices and the following better control performance. The computer simulations indicate the efficiency of the proposed scheme for the voltage and the power flow management. The proposed agent system has also had varieties of applications such as remote tuning of control devices, real time stability evaluation, real time stability control, and so on. By the coordination of these varieties of applications, self-healing system can be set up on the actual electric power systems
Study on Harmonic Analysis of Distribution Network Connected Distributed Generators
需要側のスマート利用
送配電ネットワークの次世代運用・制御
再生可能エネルギー電源の次世代制御
smart control of demand side
advanced transmission and distribution network control
advanced control of renewable energy sources

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Presentations

Comparative Evaluation of Event Triggered Control Method based on SOC of Battery and Control Method using Strict Mathematical Programming for Off-grid System on Remote Island

Kazuki Nagasawa, Yasuhiro Kodama, Yutaka Iino, Yasuhiro Hayashi, Satoru Akagi, Jun Yoshinaga

IEEJ

Presentation date： 2021.08

Event date：
2021.08

　

　
Balancing Group Operation of Wind Farms and Fixed Speed Pumped-Storage Hydro Generators for Reducing Negative Imbalance

Maiko Inagaki, Akihisa Kaneko, Yu Fujimoto, Yasuhiro Hayashi, Shinichiro Minotsu

IEEJ

Presentation date： 2021.08

Event date：
2021.08

　

　
A basic study of bidding strategy for capacity and flexibility market with adjustable power of district heating and cooling system

Yutaka Iino, Yasuhiro Hayashi, Tetsuri Ichikawa, Kosuke Kobayashi

IEEJ

Presentation date： 2021.08

Event date：
2021.08

　

　
Evaluation of the Ability to Contribute to Local Production and Local Consumption of PV by Charging Schedule Optimization Considering Phased Electrification of All Buses Operated by a Bus Company

Yuki Tomizawa, Yuto Ihara, Yasuhiro Kodama, Yutaka Iino, Yasuhiro Hayashi, Ohsei Ikeda, Jun Yoshinaga

IEEJ

Presentation date： 2021.08

Event date：
2021.08

　

　
Optimal DER Allocation Planning Method for Residential Energy Consumers Aiming to Realizing Benefit for Consumers and Value for Power Grid

Ryota Kasahara, Yutaka Iino, Yasuhiro Hayashi, Yu Kaneko

IEEJ

Presentation date： 2021.08

Event date：
2021.08

　

　
Evaluation of Resilience potential with coordinated operation of distributed energy resources

Yutaka Iino, Yasuhiro Hayashi

JSER

Presentation date： 2021.08

Event date：
2021.08

　

　
Estimation Method of Disconnection Point Using Common Earthing Conductor for Distribution Line with Branch Line

Yasuhiro Kodama, Yasuhiro Hayashi, Yusuke Nishida

IEEJ

Presentation date： 2021.08

Event date：
2021.08

　

　
The Impact on Determination of LRT Control Parameter due to Different Time Step of Voltage Measurement in Distribution System

Marika Nakamura, Shinya Yoshizawa, Akihisa Kaneko, Hideo Ishii, Yasuhiro Hayashi

IEEJ

Presentation date： 2021.08

Event date：
2021.08

　

　
Simultaneous Optimization of Charging Schedule and Battery Capacity for Electric Buses

Natsuno Kato, Yuki Tomizawa, Yuto Ihara, Yasuhiro Kodama, Yutaka Iino, Yasuhiro Hayashi, Jun Yoshinaga, Ohsei Ikeda

IEEJ

Presentation date： 2021.08

Event date：
2021.08

　

　
Consideration of Relationships Between Load of Railway Substations and Power Flow Toward Cooperative Operation of Extra-High Voltage Power System and Traction Power Supply System

Sho Nakamura, Takahiro Fukuda, Yasuhiro Kodama, Yasuhiro Hayashi, Hitoshi Hayashiya

IEEJ

Presentation date： 2021.08

Event date：
2021.08

　

　
Evaluation of Frequency Stability in Transmission Network with Grid-Forming Inverters during Generator Trip

Ryosuke Shikuma, Akihisa Kaneko, Shinya Yoshizawa, Hideo Ishii, Yasuhiro Hayashi, Hieu Xuan Nguyen, Tatsuhito Nakajima

IEEJ

Presentation date： 2021.08

Event date：
2021.08

　

　
Basic Study for Evaluate Reduction Effects of Transmission Line Overloading due to PV installation by Using Traction Power Supply System and Storage Battery for Electric Vehicles

Takahiro Fukuda, Sho Nakamura, Yasuhiro Kodama, Yasuhiro Hayashi, Hitoshi Hayashiya

IEEJ

Presentation date： 2021.08

Event date：
2021.08

　

　
Study on Cooperative Operation of Extra-High Voltage Power System and Traction Power Supply System to Reduce Transmission Line Overloading due to PV Installation

Sho Nakamura, Takahiro Fukuda, Yasuhiro Kodama, Yasuhiro Hayashi, Hitoshi Hayashiya

Presentation date： 2021.08

Event date：
2021.08

　

　
スマートメータの計測情報を用いたエリア内家庭用太陽光発電総量把握手法の検討

村山拓海, 藤本悠, 林泰弘

令和3年電気学会全国大会 (日本)

Event date：
2021.03

　

　
電力地産地消の実現に向けたスマートメーターデータに基づく都市需要の日周期性を考慮した空間分布予測

明祥吾, 宮澤歩夢, 藤本悠, 林泰弘

令和3年電気学会全国大会 (日本)

Event date：
2021.03

　

　
電力地産地消を目的とした地域エネルギーマネジメントシステムにおけるメガソーラー導入への可制御電源の寄与効果検証

宮澤歩夢, 飯野穣, 藤本悠, 光岡正隆, 林泰弘

令和3年電気学会全国大会 (日本)

Event date：
2021.03

　

　
一次調整力提供のための家庭用燃料電池と蓄電池のアグリゲーション手法

金子奈々恵, 藤本悠, 広橋亘, 林泰弘, 平井友之, 田嶋翔太

令和3年電気学会全国大会 (日本)

Event date：
2021.03

　

　
自然変動電源と蓄電池の導入拡大が非同期電源比率に及ぼす影響評価

矢部邦明, 林泰弘

令和3年電気学会全国大会 (日本)

Event date：
2021.03

　

　
配電線内のマイクログリッドにおける地絡点推定

児玉安広, 林泰弘

令和3年電気学会全国大会 (日本)

Event date：
2021.03

　

　
感度分析に基づくグルーピングを用いたNF 電源の出力抑制率決定手法の検討

丹野祐次郎, 芳澤信哉, 林泰弘, 飛田雄一, 佐々木和人

令和3年電気学会全国大会 (日本)

Event date：
2021.03

　

　
多目的価値の実現を目的とした住宅需要家群向けDER最適配置計画の検討

笠原亮太, 飯野穣, 林泰弘, 金子雄

令和3年電気学会全国大会 (日本)

Event date：
2021.03

　

　
風力発電とのバランシンググループにおける可変速揚水発電機の調整力としての運転手法 ―30分計画値同時同量のための出力制御―

稲垣舞子, 金子曜久, 藤本悠, 林泰弘, 簑津真一郎

令和3年電気学会全国大会 (日本)

Event date：
2021.03

　

　
鉄道き電系統を活用したPV導入時の系統混雑低減効果の評価に向けた特高系統モデルの構築

中村将, 福田嵩大, 芳澤信哉, 林泰弘, 林屋均

令和3年電気学会全国大会 (日本)

Event date：
2021.03

　

　
低圧配電系統における効果的なEV群協調充電実現に向けた制御対象のグルーピングに関する検討

小倉大誠, 芳澤信哉, 藤本悠, 光岡正隆, 林泰弘, 木内寛允, 村井謙介, 鈴木健太

令和3年電気学会全国大会 (日本)

Event date：
2021.03

　

　
Grid-Forming インバータ導入による系統周波数安定性への影響評価の基礎検討

志熊亮佑, 金子曜久, 芳澤信哉, 石井英雄, 林泰弘, Hieu Xuan Nguyen, 中島達人

令和3年電気学会全国大会 (日本)

Event date：
2021.03

　

　
蓄電池とディーゼル発電機の協調制御による再エネ活用オフグリッドの運用手法

長澤和輝, 飯野穣, 児玉安広, 林泰弘, 赤木覚, 吉永淳

令和3年電気学会全国大会 (日本)

Event date：
2021.03

　

　
エネルギー管理システムの計画軌道パターン学習による簡易予測制御方式の検討

飯野穣, 林泰弘

第8回制御部門マルチシンポジウム(MSCS2021) (日本) 計測自動制御学会

Event date：
2021.03

　

　
Feasibility Evaluation of Off-grid Performance in Distribution Network with Actual Data

Kazuki Nagasawa, Yutaka Iino, Yasuhiro Kodama, Yasuhiro Hayashi, Satoru Akagi, Jun Yoshinaga

The 4th International Workshop on Power Engineering in Remote Islands (IWPI2021)

Presentation date： 2021.02
水素需要および輸入水素利用を含むエネルギーシステムの最適運用モデルの構築

原田耕佑, 矢部邦明, 林泰弘

エネルギーシステム・経済・環境コンファレンス (日本) エネルギー・資源学会

Presentation date： 2021.01
分散型エネルギー資源の相互エネルギー融通による環境価値の評価

飯野穣, 林泰弘

エネルギーシステム・経済・環境コンファレンス (日本) エネルギー・資源学会

Presentation date： 2021.01
CO2削減賦課金と蓄電池の導入が石炭火力の利用率CO2排出量に及ぼす影響の評価

矢部邦明, 林泰弘

エネルギーシステム・経済・環境コンファレンス (日本) エネルギー・資源学会

Presentation date： 2021.01
Charging Schedule Optimization Method for Electric Buses with PV Installed at Bus Stations: Sensitivity Analysis of PV Capacity based on Real City Data

Yuki Tomizawa, Yuto Ihara, Teru Miyazaki, Yutaka Iino, Yasuhiro Hayashi, Ryota Yamamoto

International Conference on Smart Grids and Energy Systems (SGES2022) (Perth)

Event date：
2020.11

　

　
Basic Study on Cooperative Management Scheme of Electric Vehicle Charging for Reduction of Impact on Low-Voltage Distribution System

Taisei Ogura, Shinya Yoshizawa, Yu Fujimoto, Masataka Mitsuoka, Yasuhiro Hayashi, Kensuke Murai, Kenta Suzuki, Keigo Ikezoe

International Conference on Smart Grids and Energy Systems (SGES2021) (Perth)

Event date：
2020.11

　

　
Backup generator output control method of off-grid system based on renewable energy in remote island

Kazuki Nagasawa, Tery Miyazaki, Yutaka Iino, Yasuhiro Hayashi, Tomoaki Shoji, Jun Yoshinaga

International Conference on Smart Grids and Energy Systems (SGES2020) (Perth)

Event date：
2020.11

　

　
可制御軌道に基づく分散型エネルギー資源アグリゲーション制御

飯野穣, 林泰弘

第63回自動制御連合講演会 (日本) 計測自動制御学会

Presentation date： 2020.11
Graphical Modeling for Analysis of Hourly Electricity Demand and Market Price

Nanae Kaneko, Yu Fujimoto, Yasuhiro Hayashi

the 17th European Energy Market Conference (EEM2021) (Stockholm)

Event date：
2020.09

　

　
Day-Ahead Electricity Price Forecasting Using an Adaptive Combination Method in the Japanese Spot Market

Manaka Omura, Yu Fujimoto, Hideo Ishii, Yasuhiro Hayashi, Toshiyuki Sawa, Hiroto Sasaki, Naoto Fukuyama

the 17th European Energy Market Conference (EEM2020) (Stockholm)

Event date：
2020.09

　

　
電力地産地消を目的としたスマートメーターデータに基づく都市需要の空間的分布予測の検討

明祥吾, 宮澤歩夢, 藤本悠, 林泰弘

令和2年電気学会電力・エネルギー部門大会 (日本)

Event date：
2020.09

　

　
HEMSとの協調を考慮した需要家蓄電池の配電系統電圧制御手法

福井将悟, 宮崎輝, 広橋亘, 林泰弘, 松本直也, 松本侑, 稲垣信

令和2年電気学会電力・エネルギー部門大会 (日本)

Event date：
2020.09

　

　
電力負荷推移の要因分析を目的とした統計的グラフ構造の解析―日本とドイツの比較―

金子奈々恵, 藤本悠, 林泰弘

令和2年電気学会電力・エネルギー部門大会 (日本)

Event date：
2020.09

　

　
配電損失最小構成技術の効果的普及に向けた適地選定のための統計的スクリーニング手法

阿美咲良, 宮崎輝, 藤本悠, 林泰弘, 長谷川匡彦, 宮里善貴, 篠崎一樹

令和2年電気学会電力・エネルギー部門大会 (日本)

Event date：
2020.09

　

　
地域間連系線と蓄電池の最適運用による全国大のCO2削減効果の評価

矢部邦明, 林泰弘

令和2年電気学会電力・エネルギー部門大会 (日本)

Event date：
2020.09

　

　
配電系統計測情報の特徴量に基づいたSVR整定値のリアルタイム補正方法の基礎検討

村上晃平, 芳澤信哉, 林泰弘, 近藤宏, 金沢由樹, 野村英生, 梶川拓也

令和2年電気学会電力・エネルギー部門大会 (日本)

Event date：
2020.09

　

　
実都市データを用いたPV逆潮流削減を目的とした電動バスの最適充電スケジュール決定手法

富澤勇輝, 井原雄人, 宮崎輝, 飯野穣, 林泰弘, 山本良太, 吉永淳, 篠崎一樹

令和2年電気学会電力・エネルギー部門大会 (日本)

Event date：
2020.09

　

　
PVとEVを導入した低圧系統の電圧分布分析に基づくLRT制御パラメータ決定頻度に関する電圧制御性能評価

中村麻理香, 芳澤信哉, 石井英雄, 林泰弘

令和2年電気学会電力・エネルギー部門大会 (日本)

Event date：
2020.09

　

　
電力系統の感度分析に基づくノンファーム型電源の出力抑制量決定手法の基礎検討

丹野祐次郎, 芳澤信哉, 林泰弘, 飛田雄一, 佐々木和人

令和2年電気学会電力・エネルギー部門大会 (日本)

Event date：
2020.09

　

　
スマートハウス重点機器群による需要家利益と系統貢献の両立にむけた基礎検討

笠原亮太, 飯野穣, 林泰弘, 金子雄, 河口俊朗, 岸本卓也

令和2年電気学会電力・エネルギー部門大会 (日本)

Event date：
2020.09

　

　
短期風力発電量予測の評価の検討：北海道における変動緩和要件の観点から

中山優佳, 藤本悠, 林泰弘, 野原大輔, 大庭雅道, 門倉真二

令和2年電気学会電力・エネルギー部門大会 (日本)

Event date：
2020.09

　

　
低圧配電系統における電圧逸脱と設備容量超過を低減するための系統内EV群充電マネジメントの基礎検討

小倉大誠, 芳澤信哉, 藤本悠, 光岡正隆, 林泰弘, 村井謙介, 鈴木健太, 池添圭吾

令和2年電気学会電力・エネルギー部門大会 (日本)

Event date：
2020.09

　

　
機器消費電力推移波形の形状に着目した機器別消費電力推定手法の検討

藤田恵, 藤本悠, 林泰弘

令和2年電気学会電力・エネルギー部門大会 (日本)

Event date：
2020.09

　

　
EV普通・急速充電による電圧逸脱軽減に向けたEV充電器の進相力率一定制御の有用性評価

平野和明, 芳澤信哉, 林泰弘, 石丸雅章, 橋本茂男, 杉本仁志

令和2年電気学会電力・エネルギー部門大会 (日本)

Event date：
2020.09

　

　
時間帯・季節を考慮した再生可能エネルギーを主体とする離島オフグリッドシステムの運用手法

長澤和輝, 宮崎輝, 林泰弘, 庄司智昭, 吉永淳

令和2年電気学会電力・エネルギー部門大会 (日本)

Event date：
2020.09

　

　
風力発電の安定利用を目的としたバランシンググループにおける揚水発電機の運転計画決定手法

金子曜久, 稲垣舞子, 藤本悠, 林泰弘, 野中俊介

令和2年電気学会電力・エネルギー部門大会 (日本)

Event date：
2020.09

　

　
インバランス平準化を考慮した蓄電池による太陽光発電の計画発電手法に関する検討

劉安東, 石井英雄, 林泰弘, 朱桂萍

令和2年電気学会電力・エネルギー部門大会 (日本)

Event date：
2020.09

　

　
PV 予測誤差による電圧逸脱の低減を目的とした電圧感度に基づく無効電力制御とVolt-Watt 制御の組み合わせ制御手法

栁谷侑, 村上晃平, 芳澤信哉, 石井英雄, 林泰弘, 松浦隆祥, 濱田拓

令和2年電気学会電力・エネルギー部門大会 (日本)

Event date：
2020.09

　

　
住宅・業務施設を統合化した地域エネルギー需給シミュレーション：東京４区市を対象とするケーススタディ

正田悠人, 山口容平, 芳澤信哉, 陳何苗, 岡田健志, 杉山みなみ, 下田吉之, 林泰弘

第39回エネルギー・資源学会研究発表会 (日本)

Presentation date： 2020.07
需要家EMS群と協調した地産地消型エネルギー・環境マネジメントシステムの提案と評価

飯野穣, 林泰弘

第39回エネルギー・資源学会研究発表会 (日本)

Presentation date： 2020.07
CO2削減賦課金の導入が全国大のCO2排出量とコストに及ぼす影響の評価

矢部邦明, 林泰弘

第39回エネルギー・資源学会研究発表会 (日本)

Presentation date： 2020.07
Environmental Efficiency Evaluation in High Solar Wind Penetration Region with Fractional Optimization-based Operational Planning

Akira Yoshida, Kuniaki Yabe, Hideo Ishii, Yoshiharu Amano, Yasuhiro Hayashi

The 33rd International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS2020)

Event date：
2020.06

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2020.07
An evaluation of CO2 emission reduction by EV and FCV introduction considering stable and economical power system operation

Kuniaki Yabe, Yasuhiro Hayashi

The 33rd International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS2020)

Event date：
2020.06

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2020.07
Battery smoothing control for photovoltaic system using short-term forecast with total sky images

Anto Ryu, Hideo Ishii, Yasuhiro Hayashi

Power Systems Computation Conference (PSCC)

Event date：
2020.06

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2020.07
離島における再生可能エネルギーを主体としたオフグリッド電源構成の検討

長澤和輝, 宮崎輝, 林泰弘, 庄司智昭, 吉永淳

令和2年電気学会全国大会

Presentation date： 2020.03
実都市データに基づくPV 発電利用の最大化を目的とした電動バスの充電時間組合せ最適化問題に関する初期検討,

富澤勇輝, 井原雄人, 宮崎輝, 飯野穣, 林泰弘, 山本良太

令和2年電気学会全国大会

Presentation date： 2020.03
電圧感度を用いたスマートインバータの無効電力制御手法に関する一検

栁谷侑, 村上晃平, 芳澤信哉, 石井英雄, 林泰弘, 松浦隆祥, 濱田拓

令和2年電気学会全国大会

Presentation date： 2020.03
PVとEVを導入した低圧系統の電圧分布分析に基づく電圧制御パラメータ決定手法の検討

中村麻理香, 芳澤信哉, 石井英雄, 林泰弘

令和2年電気学会全国大会

Presentation date： 2020.03
送電系統事故時における配電系統連系PVの動的無効電力ポテンシャル評価,

水上瑛太, 金子曜久, 芳澤信哉, 石井英雄, 林泰弘

令和2年電気学会全国大会

Presentation date： 2020.03
テンソル分解手法を用いた都市における人の時空間挙動解析の検討,

板場直人, 藤本悠, 林泰弘

令和2年電気学会全国大会

Presentation date： 2020.03
EV大量導入に向けた電圧制御機器の整定値更新とEV充電器の進相力率一定制御による電圧品質向上効果の評価

平野和明, 芳澤信哉, 林泰弘, 石丸雅章, 橋本茂男, 杉本仁志

令和2年電気学会全国大会

Presentation date： 2020.03
部分ループ最適系統構成決定を目的とした配電損失と供給信頼性の評価

金子曜久, 林泰弘, 姉川高也, 外薗秀康, 桑下敬康

令和2年電気学会全国大会

Presentation date： 2020.03
契約電力制約を考慮した商業施設利用者に対するEV充電サービスの検討

宮原将太, 芳澤信哉, 藤本悠, 林泰弘, 稲垣伸吉, 川島明彦, 鈴木達也

令和2年電気学会全国大会

Presentation date： 2020.03
EV充電が柱上変圧器の設備利用率に与える影響の評価

小倉大誠, 芳澤信哉, 藤本悠, 光岡正隆, 林泰弘, 村井謙介, 鈴木健太, 池添圭吾

令和2年電気学会全国大会

Presentation date： 2020.03
電力貯蔵装置における電化交通のき電系統と配電系統への多目的充放電制御

小鯖裕之, 小林宏泰, 宮崎輝, 飯野穣, 近藤圭一郎, 林泰弘, 山本良太, 長谷川匡彦, 吉永淳

令和2年電気学会全国大会

Presentation date： 2020.03
複数予測結果の統合による電力スポット市場価格予測-精度向上に向けた状況別統合の検討-

大村愛花, 藤本悠, 林泰弘, 澤敏之, 佐々木浩人, 福山直人, 西野由高

令和2年電気学会全国大会

Presentation date： 2020.03
石炭火力の使用年数上限の設定がCO2排出量と発電コストに与える影響評価

矢部邦明, 林泰弘

令和2年電気学会全国大会

Presentation date： 2020.03
複数の電力市場価値に対応した分散型エネルギー資源の階層型最適配分計画に関する考察

飯野穣, 林泰弘

計測自動制御学会第７回制御部門マルチシンポジウム(MSCS2020)

Presentation date： 2020.03
機器のON/OFF状態推定機構を導入したRestricted Boltzmann Machineに基づく機器消費電力推定手法の検討

藤田恵, 藤本悠, 林泰弘

令和2年電気学会全国大会

Presentation date： 2020.03
Evaluation and Visualization of kW / kWh Cost of a District Heating and Cooling System for Electricity Adjustment

Kohei TOMITA, Yasuhiro HAYASHI, Yutaka IINO, Yuto YAMAMOTO, Kosuke KOBAYASHI

ICEEN 2020: The 8th International Conference on Electrical Energy and Networks, Singapore, March 7-9, 2020

Presentation date： 2020.03
Stability Evaluation of a Multi-objective Dispatch of Frequency Control Generators in Cross-Regional Operation under Various Conditions

Daichi Azami, Akihisa Kaneko, Yasuhiro Hayashi, Shun Tanaka

IEEE The International Smart Grid Technologies (ISGT) Nortth America Conference 2020, Washington DC

Presentation date： 2020.02
On Nonintrusive Monitoring of Electrical Appliance Load via Restricted Boltzmann Machine with Temporal Reservoir

Megumi Fujita, Yu Fujimoto, Yasuhiro Hayashi

12th The International Conference on Agents and Artificial Intelligence 2020, Valletta-Malta

Presentation date： 2020.02
Advanced Voltage Control Based on Short-time Ahead Voltage Fluctuation Estimation in Distribution System

Shinya Yoshizawa, Yasuhiro Hayashi

21st Power Systems Computation Conference (PSCC 2020)

Presentation date： 2020
Estimation of Expected Cost Curve on Operation Parameter Space for Planning Residential PEFC-CGS

Yuta Tsuchiya, Yu Fujimoto, Akira Yoshida, Yoshiharu Amano, Yasuhiro Hayashi

The 13th IEEE PES PowerTech 2019, Milano, Italy

Presentation date： 2020
地域冷暖房を対象としたデマンドレスポンスのポテンシャル評価

吉田彬, 石井英雄, 天野嘉春, 林泰弘

第36回エネルギー・資源学会エネルギーシステム・経済・環境コンファレンス

Presentation date： 2020.01
太陽光発電大量導入地域における蓄熱システムの余剰電力吸収効果の検討

吉田彬, 矢部邦明, 天野嘉春, 林泰弘

第36回エネルギー・資源学会エネルギーシステム・経済・環境コンファレンス

Presentation date： 2020.01
太陽光発電大量導入地域における車両電動化のエネルギーチェーンによる経済性・環境性評価

矢部邦明, 林泰弘

第36回エネルギー・資源学会エネルギーシステム・経済・環境コンファレンス

Presentation date： 2020.01
複合エネルギーシステムのエネルギー構造モデルによる分析・可視化手法の提案

飯野穣, 林泰弘

エネルギー・資源学会, 第36回エネルギーシステム・経済・環境コンファレンス

Presentation date： 2020.01
Hot Water Demand Prediction Method for Operational Planning of Residential Fuel Cell System

Yuta Tsuchiya, Yu Fujimoto, Akira Yoshida, Yoshiharu Amano, Yasuhiro Hayashi

7th International Conference on Smart Grid (icSmarGrid 2019)

Presentation date： 2019.12
複数の電力市場を想定した分散型エネルギー資源のアグリゲーション手法に関する考察

飯野穣, 林泰弘

日本機械学会, 第62回自動制御連合講演会

Presentation date： 2019.11
スマートシティの最近の話題

飯野穣, 林泰弘

計測自動制御学会産業応用部門大会

Presentation date： 2019.10
需要家電力資源からの調整力の創出とその流通活性化に関する考察

小林延久, 石井英雄

令和元年電気学会・電子情報通信学会連載研究会

Presentation date： 2019.10
耐用取替周期を考慮した過去の電圧計測情報に基づくSVR 整定値決定方法の評価

村上晃平, 芳澤信哉, 林泰弘, 近藤宏, 石川博之, 梶川拓也

令和元年電気学会電力・エネルギー部門大会

Presentation date： 2019.09
オープンデータに基づく電力スポット市場のエリア価格予測 -複数予測結果の統合アプローチの検討‐

大村愛花, 藤本悠, 林泰弘, 澤敏之, 佐々木浩人, 福山直人, 西野由高

令和元年電気学会電力・エネルギー部門大会

Presentation date： 2019.09
離島における再生可能エネルギーを主体としたオフグリッド導入の検討

長澤和輝, 宮崎輝, 林泰弘, 冠城さやか, 吉永淳

令和元年電気学会電力・エネルギー部門大会

Presentation date： 2019.09
EV 急速充電器の配置計画と充電制御の統合手法に関する基礎検討

富澤勇輝, 小鯖裕之, 飯野穣, 宮崎輝, 光岡正隆, 林泰弘

令和元年電気学会電力・エネルギー部門大会

Presentation date： 2019.09
EV導入可能量の拡大を目的としたEV充電器の無効電力制御の評価

芳澤信哉, 平野和明, 林泰弘, 石丸雅章, 橋本茂男, 杉本仁志

令和元年電気学会電力・エネルギー部門大会

Presentation date： 2019.09
エネルギー消費量の削減支援を目的とした業務用ビルにおける機器別消費電力推定技術の検討

中山優佳, 藤本悠, 林泰弘

令和元年電気学会電力・エネルギー部門大会

Presentation date： 2019.09
次世代型路面電車交通と協調した EV 充電制御による配電系統ピークカット効果の基礎検討

小鯖裕之, 小林宏泰, 宮崎輝, 藤本悠, 飯野穣, 光岡正隆, 近藤圭一郎, 林泰弘, 山本良太, 長谷川匡彦, 吉永淳

令和元年電気学会電力・エネルギー部門大会

Presentation date： 2019.09
複数の制御パラメータ決定手法を考慮したスマートインバータの電圧制御機能の評価

栁谷侑, 村上晃平, 芳澤信哉, 石井英雄, 林泰弘

令和元年電気学会電力・エネルギー部門大会

Presentation date： 2019.09
施設契約電力を考慮した商業施設におけるEV充電サービスに関する基礎検討

宮原将太, 芳澤信哉, 藤本悠, 林泰弘

令和元年電気学会電力・エネルギー部門大会

Presentation date： 2019.09
配電損失削減を目的とした系統構成計画に対する年間電力需要の不確実性を考慮した運用最適性評価手法

阿美咲良, 宮崎輝, 藤本悠, 林泰弘, 山本良太, 安居昂紀

令和元年電気学会電力・エネルギー部門大会

Presentation date： 2019.09
EV用急速充電器が配電系統に与える影響の評価

福井将悟, 宮崎輝, 広橋亘, 林泰弘, 稲垣信, 松本直也

令和元年電気学会電力・エネルギー部門大会

Presentation date： 2019.09
デマンドレスポンスの支援を想定したDeep Echo State Networkによる機器消費電力の短時間先予測の検討

藤田恵, 藤本悠, 林泰弘

令和元年電気学会電力・エネルギー部門大会

Presentation date： 2019.09
系統貢献を目的とした地域冷暖房システムの大規模運転計画問題分割手法

冨田康平, 飯野穣, 林泰弘, 山本有途, 小林広介, 速川敦彦

令和元年電気学会電力・エネルギー部門大会

Presentation date： 2019.09
積算給湯需要予測に基づく家庭用燃料電池の運用計画作成手法

土屋祐太, 藤本悠, 吉田彬, 天野嘉春, 林泰弘

令和元年電気学会電力・エネルギー部門大会

Presentation date： 2019.09
配電系統連系PVの平常及び動的無効電力制御併用時の挙動に関する考察

水上瑛太, 金子曜久, 芳澤信哉, 石井英雄, 林泰弘

令和元年電気学会電力・エネルギー部門大会

Presentation date： 2019.09
風力発電システムの計画発電におけるウィンドファーム規模の違いによる蓄エネルギー装置の所要設備容量削減効果の比較

菊地亜希, 伊藤雅一, 林泰弘

令和元年電気学会電力・エネルギー部門大会

Presentation date： 2019.09
柱上変圧器の容量超過回避を目的とした需要家蓄電池の分散型充放電制御手法の開発と評価

大久保里矩, 芳澤信哉, 林泰弘, 河野俊介, 松田啓史, 板屋伸彦, 高野富裕

令和元年電気学会電力・エネルギー部門大会

Presentation date： 2019.09
時別電力負荷推移の要因分析を目的とした統計的グラフ構造解析の検討

金子奈々恵, 藤本悠, 林泰弘

令和元年電気学会電力・エネルギー部門大会

Presentation date： 2019.09
短時間先PV出力予測情報を活用した蓄電池によるメガソーラーの出力変動緩和制御に関する検討

劉安東, 石井英雄, 林泰弘

令和元年電気学会電力・エネルギー部門大会

Presentation date： 2019.09
PV連系配電系統におけるループ地点数が配電損失低減効果へ与える影響の評価

金子曜久, 林泰弘, 姉川高也, 外薗秀康, 大山雅之

令和元年電気学会電力・エネルギー部門大会

Presentation date： 2019.09
LDC-Control Parameters Determination by the Planes Using Measured Data from IT-switches in Distribution Systems with PV Systems,

Akihisa Kaneko, Yasuhiro Hayashi, Masakazu Ito, Takaya Anegawa, Hideyasu Hokazono, Masayuki Oyama

The 6th International Conference on Power and Energy Systems Engineering (CPESE 2019), Okinawa Japan

Presentation date： 2019.09
Multiple Scenario-based Model Predictive Control with Decision Time Limit Determination of Scenario Selection

Yutaka Iino, Yasuhiro Hayashi

2019 58th Annual Conference of the Society of Instrument and Control Engineers of Japan, SICE 2019 8859962,

Presentation date： 2019.09
CO2削減賦課金と蓄電池導入効果のエネルギーチェーンによる経済性・環境性評価

矢部邦明, 林泰弘

第38回エネルギー・資源学会研究発表会,

Presentation date： 2019.08
需要家電力資源による電力需給調整その4

小林延久, 蜷川忠治

令和元年電気学会産業応用部門大会

Presentation date： 2019.08
蓄熱空調システムの新たな活用方法とその評価

石井英雄, 吉田彬, 天野嘉春, 林泰弘

第38回エネルギー・資源学会研究発表会

Presentation date： 2019.08
負荷調整力アグリゲーションにおける需要家分散型エネルギー資源のポテンシャル評価プロセスの提案

飯野穣, 林泰弘

第38回エネルギー・資源学会研究発表会

Presentation date： 2019.08
Proposal and evaluation of an equipment operating method using solar radiation prediction in a zero energy house

Reina Oki, Yugo Tsuneoka, Shingo Yamaguch, Soma Sugano, Jun Nakagawa, Naoya Watanabe, Tatsuhiro Kobayashi, Shin-ichi Tanabe, Takashi Akimoto, Yasuhiro Hayashi, Shinji Wakao

E3S Web of Conferences

Presentation date： 2019.08
Residential Battery Conmtrol Methjod for Life Continuity Planning in Home with Medical Equipment

Fujio Iwata, Akihiro Iwata, Shinya Yoshizawa, Yu Fujimoto, Yasuhiro Hayashi

The International Conference on Electrical Engineering (ICEE) Conference 2019

Presentation date： 2019.07
Voltage Control Performance Evaluation of Advanced Inverter Function for Photovoltaic Integration in Distribution Networks

Yu Yanagiya, Kohei Murakami, Shinya Yoshizawa, Hideo Ishii, Yasuhiro Hayashi

The International Conference on Electrical Engineering (ICEE) Conference 2019

Presentation date： 2019.07
Robustness Evaluation Method of Loss Minimization Approach for Actual Distribution Network Configuration against Uncertainty of Annual Load and PV Curves,

Sakura Ami, Yuji Takenobu, Shingo Uchiyama, Teru Miyazaki, Yu Fujimoto, Yasuhiro Hayashi, Ryota Yamamoto, Takaki Yasui

The International Conference on Electrical Engineering (ICEE) Conference 2019

Presentation date： 2019.07
Forecast of Electricity Spot Prices in Japan on Integrating Multiple Open Data-Driven Prediction Methods

Manaka Omura, Yu Fujimoto, Toshiyuki Sawa, Hiroto Sasaki, Naoto Fukuyama, Yoshitaka Nishino, Yasuhiro Hayashi

The International Conference on Electrical Engineering (ICEE) Conference 2019

Presentation date： 2019.07
Evaluation of Dynamic Var Support from PV Systems under Uncertain Weather Conditions

Eita Mizukami, Akihisa Kaneko, Yuji Takenobu, Satoru Akagi, Shinya Yoshizawa, Hideo Ishii, Yasuhiro Hayashi

International Youth Conference on Energy (IYCE 2019), Bled, Slovenia

Presentation date： 2019.07
Evaluation of Impact on Light Rail Transit Using Integrated Dynamic Modeling of Power and Transportation System

Hiroyuki Kosaba, Hiroyasu Kobayashi, Yuji Takenobu, Teru Miyazaki, Yu Fujimoto, Yutaka Iino, Masataka Mitsuoka, Keiichiro Kondo, Yasuhiro Hayashi, Ryota Yamamoto, Masahiko Hasegawa, Jun Yoshinaga

International Council on Electrical Engineering ICEE Conference 2019

Presentation date： 2019.07
Analysis of Energy Procurement Balance Focusing on Imbalance Settlement Scheme in Japanese Electricity Market

Nanae Kaneko, Yu Fujimoto

International Council on Electrical Engineering ICEE Conference 2019

Presentation date： 2019.07
Optimal Configuration of Loop-Radial Hybrid Distribution Networks under Various PV Systems Penetration

Akihisa Kaneko, Masakazu Ito, Yasuhiro Hayashi, Takaya Anegawa, Hideyasu Hokazono, Masayuki Oyama

The International Council on Electrical Engineering ICEE Conference 2019

Presentation date： 2019.07
Enhancing Security for Voltage Control of Distribution Systems under Data Falsiﬁcation Attacks

Mizuki Onogawa, Shinya Yoshizawa, Yu Fujimoto, Hideaki Ishii, Isao Ono, Takashi Onoda, Yasuhiro Hayashi

Proceedings of the American Control Conference, 2019

Presentation date： 2019.07
Toward Data-Driven Identification of Essential Factors Causing Seasonal Change in Daily Electricity Demand Curve

Nanae Kaneko, Yu Fujimoto, Yasuhiro Hayashi

the 13th IEEE PowerTech 2019, Milano, Italy

Presentation date： 2019.06
Decentralized Charging Control of Battery Energy Storage Systems

Riku Okubo, Shinya Yoshizawa, Yasuhiro Hayashi, Shunsuke Kawano, Tomihiro Takano, Nobuhiko Itaya

2019 IEEE Milan PowerTech, PowerTech 2019

Presentation date： 2019.06
Expected Cost Curve on Operation Parameter Space for Planning Residential PEFC–CGS

Yuta Tsuchiya, Yasuhiro Hayashi, Yu Fujimoto, Akira Yoshida, Yoshiharu Amano

2019 IEEE Milan PowerTech, PowerTech 2019

Presentation date： 2019.06
Experimental Study of the Isolated Operation of a home DC Link System,

Teru Miyazaki, Wataru Hirohashi, Jun Yoshinaga, Yasuhiro Hayashi, Kosuke Kobayashi, Tatsuya Tsukada

CIRED 2019 25th International Conference on Electricity Distribution, Madrid 3-6 June 2019

Presentation date： 2019.06
Asynchronous ADMM HEMS aggregation scheme in smart grid

Akira Yoshida, Yu Fujimoto, Yoshiharu Amano, Yasuhiro Hayashi

the 31st International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (2018)

Presentation date： 2019.05
LRTとEVによる電化交通システムが配電系統運用に与える影響の基礎評価

小鯖裕之, 小林宏泰, 竹延祐二, 宮崎輝, 藤本悠, 飯野穣, 光岡正隆, 近藤圭一郎, 林泰弘, 吉永淳, 山本良太, 長谷川匡彦

平成31年電気学会全国大会

Presentation date： 2019.03
スマートインバータのスケジューリング機能を用いた力率制御の高度化手法の一検討

栁谷侑, 村上晃平, 芳澤信哉, 石井英雄, 林泰弘

平成31年電気学会全国大会

Presentation date： 2019.03
実配電系統モデルを用いたPV・EV導入量の年次推移に対する配電系統電圧対策の評価

宮原将太, 赤木覚, 芳澤信哉, 宮崎輝, 石井英雄, 林泰弘, 山口博史, 棚澤昌幸, 山本正紀

平成31年電気学会全国大会

Presentation date： 2019.03
高次元オープンデータに基づく電力スポット市場価格予測―複数予測結果の統合アプローチの検討

大村愛花, 藤本悠, 林泰弘, 澤敏之, 佐々木浩人, 福山直人, 西野由高

平成31年電気学会全国大会

Presentation date： 2019.03
デマンドレスポンスの支援を想定した機器消費電力の短時間先予測の検討

藤田恵, 藤本悠, 林泰弘

平成31年電気学会全国大会

Presentation date： 2019.03
年間電力需要の不確実性に対する配電損失最小化運用計画のロバスト性評価手法

阿美咲良, 竹延祐二, 内山慎距, 宮崎輝, 藤本悠, 林泰弘, 山本良太, 安居昂紀

平成31年電気学会全国大会

Presentation date： 2019.03
RES変動時におけるパレート最適解集合を用いた調整用発電機の価値評価手法に関する基礎検討

浅見拓一知, 金子曜久, 林泰弘, 野中俊介

平成31年電気学会全国大会

Presentation date： 2019.03
センサ開閉器の計測情報に基づく配電損失最小化運用の年間評価

内山慎距, 竹延祐二, 阿美咲良, 宮崎輝, 林泰弘, 山本良太, 安居昂紀

平成31年電気学会全国大会

Presentation date： 2019.03
系統貢献を目的とした起動停止制約を考慮した地域冷暖房システムの数値モデル構築, 平成31年電気学会全国大会

冨田康平, 伊藤雅一, 林泰弘, 山本有途, 小林広介, 速川敦彦

平成31年電気学会全国大会

Presentation date： 2019.03
家庭用燃料電池の運用計画作成のための給湯需要予測手法に関する一検討

土屋祐太, 藤本悠, 吉田彬, 天野嘉春, 林泰弘

平成31年電気学会全国大会

Presentation date： 2019.03
瞬時電圧低下時の電圧降下量・PV発電状況による配電系統の動的無効電力出力への影響評価

水上瑛太, 伊藤雅一, 林泰弘, 大恵慎平, 山本享慶, 大山雅之

平成31年電気学会全国大会

Presentation date： 2019.03
配電系統におけるPV導入推移の不確実性を考慮した長期的な電圧調整設備配備計画の一検討

三上大智, 芳澤信哉, 藤本悠, 林泰弘, 松田源立

平成31年電気学会全国大会

Presentation date： 2019.03
蓄電池容量の多様性を考慮した需要家蓄電池の分散型充電制御手法の評価

大久保里矩, 芳澤信哉, 林泰弘, 河野俊介, 板屋伸彦, 高野富裕

平成31年電気学会全国大会

Presentation date： 2019.03
インバランス料金の算定機構に着目した変数間の関係性の把握に基づく需給状況の解析

金子奈々恵, 藤本悠

平成31年電気学会全国大会

Presentation date： 2019.03
太陽光発電の有効消費を目的とした住宅タウンでの階層型蓄電池制御

谷哲郎

平成31年電気学会全国大会

Presentation date： 2019.03
気象情報を活用した再生可能エネルギーを主体とする離島オフグリッドの運用手法の検討

宮崎輝, 釜壮一郎, 林泰弘, 冠城さやか, 吉永淳

平成31年電気学会全国大会

Presentation date： 2019.03
住宅負荷を擁した再生可能エネルギーを主体としたオフグリッドにおける発電・蓄電設備容量および運用方法の決定手法

釜壮一郎, 宮崎輝, 林泰弘, 吉永淳, 冠城さやか

平成31年電気学会全国大会

Presentation date： 2019.03
スマートインバータの電圧制御パラメータ更新による電力損失と電圧制御性能に関する定量的評価

高澤佑太, 赤木覚, 芳澤信哉, 石井英雄, 林泰弘

平成31年電気学会全国大会

Presentation date： 2019.03
PV連系配電系統における部分ループ最適構成決定手法に関する基礎検討

金子曜久, 伊藤雅一, 林泰弘, 姉川高也, 外薗秀康, 大山雅之

平成31年電気学会全国大会

Presentation date： 2019.03
エリア風力発電量予測の高度化–気象場予測データに対する時空間特徴量抽出

東山和寿, 藤本悠, 林泰弘

平成31年電気学会全国大会

Presentation date： 2019.03
系統用蓄電池による変動緩和の性能向上を目的としたState-of-Charge Feedback制御の基礎検討

赤木覚, 芳澤信哉, 伊藤雅一, 藤本悠, 宮崎輝, 林泰弘, 矢野孝, 久田俊哉, 田和克久

平成31年電気学会全国大会

Presentation date： 2019.03
Minimizing Losses in Zone-based Volt-Var Settings Through Genetic Algorithms

村上晃平, 石井英雄, 林泰弘, Hamed V. Haghi, Jan Kleissl

平成31年電気学会全国大会

Presentation date： 2019.03
Volt-var制御の時間変化率変更による電圧制御効果への影響評価

山下裕輔, 村下直久, 芳澤信哉, 宮崎輝, 林泰弘

平成31年電気学会全国大会

Presentation date： 2019.03
EV普及拡大を見据えた実配電系統における三相配電線電圧への影響評価

芳澤信哉, 林泰弘, 石丸雅章, 橋本茂男, 杉本仁志

平成31年電気学会全国大会

Presentation date： 2019.03
モデル予測型電圧制御手法における電圧変動推定区間と電圧制御性能に関する評価

芳澤信哉, 林泰弘

平成31年電気学会全国大会

Presentation date： 2019.03
需要家電力資源の余力による電力需給調整サービスの構築

小林延久, 石井英雄, 横山健児, 宮本裕介

平成31年電気学会全国大会

Presentation date： 2019.03
CO2削減賦課金による火力からの排出量削減

矢部邦明, 林泰弘

平成31年電気学会全国大会

Presentation date： 2019.03
分散エネルギー資源と電力システムの将来

石井英雄

平成31年電気学会全国大会

Presentation date： 2019.03
マルチシナリオベースモデル予測制御方式の提案

飯野穣, 林泰弘

第6回計測自動制御学会制御部門マルチシンポジウム

Presentation date： 2019.03
需要家電力資源による需給調整を実現する通信ネットワークの技術要件

小林延久, 田中立二, 芹沢善積, 水野修

電気学会スマートファシリティ研究会

Presentation date： 2019.02
需要家の負荷データに基づく負荷調整力ポテンシャルの視覚的評価方法の提案

飯野穣, 林泰弘

第35回エネルギーシステム・経済・環境コンファレンス

Presentation date： 2019.01
蓄電池を再生可能エネルギー併用する場合の環境性と経済性のエネルギーチェーンを考慮した評価

矢部邦明, 林泰弘

第35回エネルギーシステム・経済・環境コンファレンス

Presentation date： 2019.01
エネルギーチェーンによる将来のエネルギーシステムの定量的評価の提案

石井英雄, 矢部邦明, 林泰弘

第35回エネルギーシステム・経済・環境コンファレンス

Presentation date： 2019.01
電圧変動推定に基づくモデル予測型電圧制御手法に関する検討

芳澤信哉, 林泰弘

電力系統技術研究会

Presentation date： 2019.01
PV大量導入時における複数電圧階級の協調VQC装置運用決定手法

金子曜久, 芳澤信哉, 林泰弘, 杉村修平, 植田喜延, 田邊隆之

電力系統技術研究会

Presentation date： 2019.01
Optimal Responses of Home Energy Management Systems to Volt-watt Functions and Forecast Errors

Dao Van Tu, Hideo Ishii, Yasuhiro Hayashi, Yuta Takasawa, Kohei Murakami, Yuji Takenobu, Hiroshi Kikusato, Akihisa Kaneko, Shinya Yoshizawa

2018 IEEE PES Innovative Smart Grid Technologies Conference Europe, ISGT-Europe 2018

Presentation date： 2018.10
Evaluation of Voltage Regulation Functions of Smart Inverters Based on Penetration Level and Curtailment in Photovoltaic Systems

Yuta Takasawa, Satoru Akagi, Shinya Yoshizawa, Hideo Ishii, Yasuhiro Hayashi

2018 IEEE PES Innovative Smart Grid Technologies Conference Europe, ISGT-Europe 2018

Presentation date： 2018.10
Japan's R&D Project of Ramp Forecasting Technology: A Machine Learning Scheme for Ramp Forecast

Yu Fujimoto, Kazutoshi Higashiyama, Yasuhiro Hayashi

17th internationaol wind workshop, Stockholm

Presentation date： 2018.10
Basic Study of Voltage Management Scheme for Minimization of Expected Voltage Violation Risk in Distribution System

Presentation date： 2018.09
Evaluation of Zone-based Control Parameter Settings for Smart Inverter on Voltage Control in Distribution Networks

Presentation date： 2018.09
Evaluation of Energy Loss in Distribution Network with Voltage Control Functionality Depending on the Classification of PV Profiles

Presentation date： 2018.09
Decision Method of Operation and Capacities Selection of Power Generator and Storage Using Weather Information in Remote Island Off-grid with High Supply Reliability Based on Renewable Energy

Presentation date： 2018.09
Scheduled Generation of Wind Turbine Generator System by using the Composed Air Energy Storage System

Presentation date： 2018.09
Group Lasso for Factor Analysis of Variable Attributes in Medium-term Power Demand Forecast

Presentation date： 2018.09
A Study on PV Outpur Smooting with Energy Storage System

Presentation date： 2018.09
Evaluation of Experiments of the Forecast Vased Sequential Control for Ramp Event Mitigation of Wind Farm's Output Power by using a Compressed Air Energy Storage System

Presentation date： 2018.09
Energy Loss Evaluation Using Distribution Network Reconfiguration Based on Measurements of Switches

Presentation date： 2018.09
Economic Evaluation of Increased Self-use of PV Output Driven by Storage Battery System

Presentation date： 2018.09
Evaluation of Dynamic Voltage Responses of Distributed Energy Resources in Distribution Systems

Yuji Takenobu, Satoru Akagi, Hideo Ishii, Yasuhiro Hayashi, Jens Boemer, Deepak Ramasubramanian, Parag Mitra, Anish Gaikwad, Ben york

2018 IEEE Power & Energy Society General Meeting (PESGM)

Presentation date： 2018.08
HEMS Operation with Utility Requirements for Rooftop Solar-Battery Systems

Van Tu Dao, Hideo Ishii, Yasuhiro Hayashi

2018 IEEE Power & Energy Society General Meeting (PESGM)

Presentation date： 2018.08
Emerging Requirement in Decentralized and Democratized Electric Power System

Hideo Ishii, Kazuhiko Ogimoto, Yasuhiro Hayashi

GRE 2018 (Grand Renewable Energy)

Presentation date： 2018.06
A Comparative Study of Regional Wind Power Forecasting:Direct Approach and Aggregating Approach

Kazutoshi Higashiyama, Yu Fujimoto, Yasuhiro Hayashi

GRE 2018 (Grand Renewable Energy)

Presentation date： 2018.06
Configuration of Large-Scale Battery System with Volt-VAR function in Distribution Network with Advanced Load Tap Changer Control

Satoru Akagi, Ben York, Mobolaji Bello, Hideo Ishii, Yasuhiro Hayashi

2018 IEEE 7th World Conference on Photovoltaic Energy Conversion (WCPEC) (A Joint Conference of 45th IEEE PVSC, 28th PVSEC & 34th EU PVSEC)

Presentation date： 2018.06
Scheduling Method of Wind Power Generation for Electricity Market using State-of-Charge Transition and Forecast Error

Aki Kikuchi, Masakazu Ito, Yasuhiro Hayashi

24th International Conference on Electrical Engineering, Seoul, Korea

Presentation date： 2018.06
Optimal Responses of Home Energy Management Systems to Aggregator and Utility Requirements

Van Tu Dao, Hideo Ishii, Yasuhiro Hayashi, Yuta Takasawa, Kohei Murakami

ISGT Asia 2018 (IEEE Innovative Smart Grid Technologies- Asia)

Presentation date： 2018.05
Hierarchical BESS management for electric power self-supply ratio improvement and power flow reduction in residential town

Tetsuro Tani, Shiya Yoshizawa, Teru Miyazaki, Wataru Hirohashi, Yasuhiro Hayashi, Masakazu Shio, Takashi Umeoka

2018 IEEE Power and Energy Society Innovative Smart Grid Technologies Conference, ISGT 2018

Presentation date： 2018.02
Optimal smart functions of large-scale PV inverters in distribution systems

Van Tu Dao, Hideo Ishii, Yasuhiro Hayashi

2017 IEEE Innovative Smart Grid Technologies - Asia (ISGT-Asia)

Presentation date： 2017.12
Evaluation of energy-loss minimum operations using real measurements and network data

Shingo Uchiyama, Yuji Takenobu, Jun Yoshinaga, Yasuhiro Hayashi, Masato Watanabe, Ryota Yamamoto

2017 IEEE Innovative Smart Grid Technologies - Asia (ISGT-Asia)

Presentation date： 2017.12
Installed generator capacity determination method with variable weather-based SOC operation for island-alone off-grid system

Souichiro Kama, Jun Yoshinaga, Wataru Hirohashi, Yasuhiro Hayashi, Masato Watanabe, Hikaru Takigasaki

2017 IEEE Innovative Smart Grid Technologies - Asia (ISGT-Asia)

Presentation date： 2017.12
Effectiveness of updating the parameters of the Volt-VAR control depending on the PV penetration rate and weather conditions

Yuta Takasawa, Satoru Akagi, Shinya Yoshizawa, Hideo Ishii, Yasuhiro Hayashi

2017 IEEE Innovative Smart Grid Technologies - Asia (ISGT-Asia)

Presentation date： 2017.12
Voltage and Energy Loss Assessment for Systems with Smart Inverter Functions of Rooftop Solar

Tu Van Dao, Hideo Ishii, Yasuhiro Hayashi

14th International Conference on Electrical Engineering/ Electronics, Computer, Telecommunications and Information Technology (ECTI-CON)

Presentation date： 2017.06
Stochastic Model Predictive Control of Residential Fuel Cell Cogeneration Unit with Periodic Forecast Update for Distributed Architecture

Akira Yoshida, Jun Yoshikawa, Yu Fujimoto, Yoshiharu Amano, Yasuhiro Hayashi

Proceedings of ECOS 2017 – 30th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems

Presentation date： 2017.06
Energy Disaggregation based on Semi-supervised Matrix Factorization using Feedback Information from Consumers

Ayumu Miyasawa, Masako Matsumoto, Yu Fujimoto, Yasuhiro Hayashi

IEEE PES Innovative Smart Grid Technologies Conference Europe

Presentation date： 2017.06
Method for Determining Voltage Control Parameters of Low-Voltage Regulator Using Forecast Interval of Photovoltaic Output

Masaya Kobayashi, Hiroshi Kikusato, Jun Yoshinaga, Yu Fujimoto, Nao Kumekawa, Shinji Wakao, Yasuhiro Hayashi, Noriyuki Motegi, Yusuke Yamashita

IEEE PES Innovative Smart Grid Technologies Conference Europe

Presentation date： 2017.06
Feature Extraction of Numerical Weather Prediction Results Toward Reliable Wind Power Prediction

Kazutoshi Higashiyama, Yu Fujimoto, Yasuhiro Hayashi

IEEE PES Innovative Smart Grid Technologies Conference Europe

Presentation date： 2017.06
Development of Prediction-based Operation Planning Method for Domestic Air-Conditioner with Adaptive Learning of Installation Environment

Ryoichi Kuroha, Yu Fujimoto, Wataru Hirohashi, Yoshiharu Amano, Shin-ichi Tanabe, Yasuhiro Hayashi

IEEE Power and Energy Society Innovative Smart Grid Technologies Conference

Presentation date： 2017.04
Optimal Allocation of Photovoltaic Systems and Energy Storage Systems Considering Constraints of Both Transmission and Distribution Systems

Ryusuke Konishi, Yuji Takenobu, Masaki Takahashi, Yasuhiro Hayashi

IEEE Power and Energy Society Innovative Smart Grid Technologies Conference

Presentation date： 2017.04
Coordinated Voltage Control of Load Tap Changers in Distribution Networks with Photovoltaic System

Hiroshi Kikusato, Masaya Kobayashi, Jun Yoshinaga, Yu Fujimoto, Yasuhiro Hayashi, Shinichi Kusagawa, Noriyuki Motegi

IEEE PES Innovative Smart Grid Technologies (ISGT)

Presentation date： 2016.10
Optimal Dispatch of Frequency Control Generators for Output Fluctuation of RES Using OPF and MOPSO

Ohsei Ikeda, Yasuhiro Hayashi, Tsuyoshi Tanaka

The International Conference on Electrical Engineering 2016

Presentation date： 2016.07
Methods to Determine Line Drop Compensator Control Parameters of Low-voltage Regulators Considering Temporal and Spatial Resolution of a Power Forecaset Profile

Masaya Kobayashi, Hiroshi Kikusato, Jun Yoshinaga, Yu Fujimoto, Yasuhiro Hayashi, Shinichi Kusagawa, Noriyuki Motegi

The International Conference on Electrical Engineering 2016

Presentation date： 2016.07
Capacity Evaluation of a Battery Energy Storage System for Multipurpose Utilization

Satoru Akagi, Shinya Yoshizawa, Jun Yoshinaga, Masakazu Ito, Yu Fujimoto, Yasuhiro Hayashi, Takashi Yano, Hideaki Nakahata, Toshiya Hisada, Xuan Mai Tran

The International Conference on Electrical Engineering 2016

Presentation date： 2016.07
Advanced Decentralized Voltage Control Method of Voltage Regulators Based on Measurements in Distribution System with PVs

Kohei Murakami, Shinya Yoshizawa, Yu Fujimoto, Yasuhiro Hayashi, Shunsuke Sasaki, Hiroyuki Ishikawa, Takuya Kajikawa

The International Conference on Electrical Engineering 2016

Presentation date： 2016.07
Control Methods for an Energy Storage System when Wind Power Output Deviate Grid Code

Masakazu Ito, Yu Fujimoto, Masataka Mitsuoka, Hideo Ishii, Yasuhiro Hayashi

The International Conference on Electrical Engineering 2016

Presentation date： 2016.07
Energy Disaggregation Based on Semi-Binary NMF

Masako Matsumoto, Yu Fujimoto, Yasuhiro Hayashi

International Conference on Machine Learning and Data Mining in Pattern Recognition,Vol.9729

Presentation date： 2016.07
Advanced Islanding Operation Method Integrating Multiple Power Supplies Including Photovoltaic Power Generation

Jun Yoshinaga, Wataru Hirohashi, Yasuhiro Hayashi, Satoshi Sato, Makoto Ohashi, Jiro Miyake, Shizuo Tsuchiya

CIRED Workshop

Presentation date： 2016.06
Method for Enumerating Feasible LDC parameters for OLTC and SVR in Distribution Networks

Shunsuke Kawano, Shinya Yoshizawa, Yasuhiro Hayashi

Proceedings of 2nd International Conference on Intelligent Green Building and Smart Grid

Presentation date： 2016.06
Maximizing Hosting Capacity of Distributed Generation by Network Reconfiguration in Distribution System

Yuji Takenobu, Shunsuke Kawano, Yasuhiro Hayashi, Norihito Yasuda, Shin-ich Minato

19th Power Systems Computation Conference (PSCC)

Presentation date： 2016.06
Centralized Voltage Control Method using Voltage Forecasting by JIT Modeling in Distribution Networks

Shunsuke Kawano, Shinya Yoshizawa, Yasuhiro Hayashi

Proceedings of IEEE Power Engineering Society Transmission and Distribution Conference

Presentation date： 2016.05
Reproducing Statistical Property of Short-Term Fluctuation in Wind Power Profiles

Seigo Furuya, Yu Fujimoto, Noboru Murata, Yasuhiro Hayashi

10th International Renewable Energy Storage Conference (Dusseldofr, Germany)

Presentation date： 2016.03
送配電系統における太陽光発電と電力貯蔵装置の最適導入量決定問題

小西隆介, 高橋正樹, 竹延祐二, 林泰弘

平成28年電気学会全国大会 (東北大学川内北キャンパス)

Presentation date： 2016.03
蓄エネルギー装置の出力事前制御による力発電出力変動緩和のための所要量削減効果に関する基礎検討

伊藤雅一, 藤本悠, 光岡正隆, 石井英雄, 林泰弘

平成28年電気学会全国大会 (仙台市)

Presentation date： 2016.03
大規模配電網における分散型電源連系可能最大容量の厳密解法

竹延祐二, 河野俊介, 林泰弘, 安田宜仁, 湊真一

平成28年電気学会全国大会 (東北大学川内北キャンパス)

Presentation date： 2016.03
配電損失最小化問題のスケーラブルな厳密解法

安田宜仁, 湊真一, 竹延祐二, 林泰弘

平成28年電気学会全国大会 (東北大学川内北キャンパス)

Presentation date： 2016.03
Power and Capacity Requirement for an Energy Storage from Grid Codes

Masakazu Ito, Yu Fujimoto, Masataka Mitsuoka, Hideo Ishii, Yasuhiro Hayashi

IEEE PES Asia-Pacific Power and Energy Engineering Conference 2015 (Brisbane, Australia)

Presentation date： 2015.11
Determination of the Most Suitable Voltage Control Method Depending on Photovoltaic Installation Rate

Satoru Akagi, Ryo Takahashi, Akihisa Kaneko, Jun Yoshinaga, Masakazu Ito, Yasuhiro Hayashi, Hiromi Konda

IEEE APPEEC 2015 (Brisbane, Australia)

Presentation date： 2015.11
Study on Business Continuity Capability by Cooperative Operation of Photovotaic and Battery Energy Storage System

Hiroki Maruyama, Hideo Ishii, Yasuhiro Hayashi, Hajime Onojima, Yoshikane Kojima

IEEE APPEEC 2015 (Brisbane, Austaralia)

Presentation date： 2015.11
Weighted Semi-Binary NMFに基づく機器別消費電力推定

松本眞子, 藤本悠, 林泰弘

(茨城県つくば市)

Presentation date： 2015.11
ランダムフォレストに基づく風力発電のランプアラーと手法の検討

Presentation date： 2015.11
Islanding Operation Methods Integrated with Multiple Supplies and HEMS

Jun Yoshinaga, Wataru Hirohasi, Yasuhiro Hayashi, Yashito Isoe, Jiro Miyake, Shizuo Tsuchiya

2015 International Symposium on Smart Electric Distribution Systems and Technologies(EDST 2015) CIGRE SC C6 Colloquim Vienna (Vienna)

Presentation date： 2015.09
系統構成を考慮した分散型電源の連系可能最大容量の決定手段

竹延祐二, 安田宜仁, 河野俊介, 湊真一, 林泰弘

平成27年電気学会電力・エネルギー部門大会 (名古屋名城大学)

Presentation date： 2015.08
非負値行列分解の応用に基づく機器別消費電力推定の精度評価

松本眞子, 藤本悠, 林泰弘

平成27年電気学会電力・エネルギー部門大会 (名古屋名城大学)

Presentation date： 2015.08
HEMSにおける需要家機器使用傾向の学習精度に関する検証

松本直也, 藤本悠, 林泰弘

平成27年電気学会電力・エネルギー部門大会 (名古屋)

Presentation date： 2015.08
ランプ検知を目的としたエリア風力発電量予測に関する

高橋由佳, 藤本悠, 林泰弘

平成27年電気学会電力・エネルギー部門大会 (名古屋)

Presentation date： 2015.08
リアルタイム最適化による次世代集中制御手法の開発

高橋尚之, 高橋諒, 三好龍之介, 林泰弘

平成27年電気学会電力・エネルギー部門大会 (名古屋)

Presentation date： 2015.08
風速観測データベースに基づく擬似風力発電プロファイル生成手法の検討

古屋成悟, 藤本悠, 林泰弘

平成27年電気学会電力・エネルギー部門大会 (名古屋)

Presentation date： 2015.08
ピーク電力最小化を目的とした蓄電池併用型エリア間電力融通手法の検討

杉本諒太, 藤本悠, 林泰弘, 佐野豊, 栄千治

平成27年電気学会電力・エネルギー部門大会 (名古屋)

Presentation date： 2015.08
DRにおける電力需要削減効果の経時変化に関する一考察

須藤慧, 藤本悠, 林泰弘

平成27年電気学会電力・エネルギー部門大会 (名古屋)

Presentation date： 2015.08
エネルギー価格をパラメータとした地域冷暖房システムによるデマンドレスポンスへの対応可能容量の検討

高野彰久, 伊藤雅一, 林泰弘, 進士誉夫, 田所真之

平成27年電気学会電力・エネルギー部門大会 (名古屋)

Presentation date： 2015.08
網羅的な実行可能構成の列挙に基づく年間配電エネルギー損失最小化

安田宜仁, 竹延祐二, 河野俊介, 林泰弘, 湊真一

平成27年電気学会電力・エネルギー部門大会 (名古屋名城大学)

Presentation date： 2015.08
電力予測精度とHEMS/Grid EMS協調効果の関係の評価

森皓平, 喜久里浩之, 芳澤信哉, 藤本悠, 若尾真治, 林泰弘, 川島明彦, 稲垣伸吉, 鈴木達也

平成27年電気学会電力・エネルギー部門大会 (名古屋)

Presentation date： 2015.08
電圧感度推定を用いた次世代集中制御手法の評価

高橋諒, 高橋尚之, 林泰弘, 浅野浩志

平成27年電気学会電力・エネルギー部門大会 (名古屋)

Presentation date： 2015.08
PV導入拡大に対応したSVRと蓄電池との協調電圧制御手法の検討

吉永淳, 赤木覚, 林泰弘, 石橋一成

平成27年電気学会電力・エネルギー部門大会 (名古屋)

Presentation date： 2015.08
高圧配電系統の電圧制御を考慮したLVRの設置に関する基礎検討

喜久里浩之, 小林将矢, 吉永淳, 林泰弘, 草川慎一, 茂木規行

平成27年電気学会電力・エネルギー部門大会 (名古屋)

Presentation date： 2015.08
広域運用系統における風力発電出力変動補償を目的とした周波数調整用発電機の最適出力配分候補の導出

池田欧世, 林泰弘, 田中毅

平成27年電気学会電力・エネルギー部門大会 (名古屋)

Presentation date： 2015.08
連系要件の違いによる蓄エネルギー装置の所用出力・時間容量の検討

伊藤雅一, 藤本悠, 光岡正隆, 石井英雄, 林泰弘

平成27年電気学会電力・エネルギー部門大会 (名古屋)

Presentation date： 2015.08
Information Exchange between HEMS and GEMS for Effective EV Charge/Discharge Planning

MORI, Kohei, KIKUSATO, Hiroshi, YOSHIZAWA, Shinya, FUJIMOTO, Yu, HAYASHI, Yasuhiro, KAWASHIMA, Akihiko, INAGAKI, Shinkichi, SUZUKI, Tatsuya

ICEE 2015 (Hong Kong)

Presentation date： 2015.07
Evaluation of Coordinated Energy Management System for Grid and Home in Distribution System with PVs

YOSHIZAWA, Shinya, YOSHIDA, Akira, KAWANO, Shunsuke, FUJIMOTO, Yu, AMANO, Yoshiharu, HAYASHI, Yasuhiro

ICEE 2015 (Hong Kong)

Presentation date： 2015.07
Interval Forecasting for Wind Power Generation Based on Random Forests

TAKAHASHI, Yuka, FUJIMOTO, Yu, HAYASHI, Yasuhiro

ICEE 2015 (Hong Kong)

Presentation date： 2015.07
Evaluation of the Impacts of Tap Width Difference of Multiple Voltage Regulators on Voltage Control Performance of a Centralized Voltage Control Method

TAKAHASHI, Ryo, YOSHIZAWA, Shinya, ITO, Masakazu, HIROSHI, Asano, HAYASHI, Yasuhiro

ICEE 2015 (Hong Kong)

Presentation date： 2015.07
Study of Multi-Area Energy Management Method for Peak Power Minimization

SUGIMOTO, Ryota, FUJIMOTO, Yu, HAYASHI, Yasuhiro, SANO, Yutaka, SAKAE, Chiharu

ICEE 2015 (Hong Kong)

Presentation date： 2015.07
Evaluation of Demand Response Based on the Random Forests

SUDOH, Kei, FUJIMOTO, Yu, HAYASHI, Yasuhiro

ICEE 2015 (Hong Kong)

Presentation date： 2015.07
A Study of Co-Generation Systems for Power System Frequency Control with Mass Penetration of Photovoltaic and Wind Power Generation

KOBAYASHI, Shimpei, ITO, Masakazu, HAYASHI, Yasuhiro

ICEE 2015 (Hong Kong)

Presentation date： 2015.07
Basic Study on Deployment of Low-Voltage Regulator Considering Existing Voltage Control in High-Voltage Distribution Systems

KIKUSATO, Hiroshi, YOSHINAGA, Jun, FUJIMOTO, Yu, HAYASHI, Yasuhiro, KUSAGAWA, Shinichi, MOTEGI, Noriyuki

ICEE 2015 (Hong Kong)

Presentation date： 2015.07
Spatial Prediction for Generating Synthetic Wind Power Profiles Based on Kriging Approach

FURUYA, Seigo, FUJIMOTO, Yu, HAYASHI, Yasuhiro

ICEE 2015 (Hong Kong)

Presentation date： 2015.07
A Determination Method of Parameters of Line Drop Compensation in Distribution Systems with Photovoltaic Systems

ENOMOTO, Kyohei, KAWANO, Shunsuke, ITO, Masakazu, HAYASHI, Yasuhiro, ITO, Takaharu, ABE, Katsuya, MINAMI, Masahiro

ICEE 2015 (Hong Kong)

Presentation date： 2015.07
Basic Study of Grid-connected Battery Energy Storage System Capacity Determination for Load Leveling and Voltage Control

AKAGI, Satoru, YOSHIZAWA, Shinya, YOSHINAGA, Jun, ITO, Masakazu, FUJIMOTO, Yu, HAYASHI, Yasuhiro, YANO, Takashi, NAKAHATA, Hideaki, HISADA, Toshiya, TRAN, Xuan Mai

ICEE 2015 (Hong Kong)

Presentation date： 2015.07
A Personalized Energy Management for Advanced Heating Ventilating and Air Conditioning System

MATSUMOTO, Naoya, SHOJI, Tomoaki, FUJIMOTO, Yu, AMANO, Yoshiharu, TANABE, Shin-ichi, HAYASHI, Yasuhiro

ICEE 2015 (Hong Kong)

Presentation date： 2015.07
Energy Disaggregation Based on Shift-Invariant Semi-Binary Matrix Factorization

MATSUMOTO, Masako, FUJIMOTO, Yu, HAYASHI, Yasuhiro

ICEE 2015 (Hong Kong)

Presentation date： 2015.07
Distribution automation system for service restoration involving simultaneous disconnection and reconnection of distributed generators

Shunsuke Kawano, Yu Fujimoto, Shinji Wakao, Yasuhiro Hayashi, Hideaki Takenaka, Hitoshi Irie, Takashi Y. Nakajima

2015 IEEE Eindhoven PowerTech (Eindhoven, Netherland)

Presentation date： 2015.06
Determination of Dynamic Line Drop Compensation Parameters of Voltage Regulators for Voltage Rise Mitigation

A.L.M. Mufaris, J. Baba, S. Yoshizawa, Y. Hayashi

ICCEP (Italy)

Presentation date： 2015.06
ISLANDING OPERATION TECHNOLOGY INTEGRATED WITH MULTIPLE POWER SUPPLIES

Jun Yoshinaga, Wataru Hirohashi, Yasuhito Isoe, Yasuhiro Hayashi, Jiro Miyake, Shizuo Tsuchiya

CIRED 23rd International Conference on Electricity Distribution (Lyon, France)

Presentation date： 2015.06
Dynamic voltage regulator operation with demand side management for voltage control

A.L.M. Mufaris, J. Baba, S. Yoshizawa, Y. Hayashi

2015 IEEE Eindhoven PowerTech (Eindhoven, Netherland) Eindhoven, Netherland

Presentation date： 2015.06
Improvement of Prediction Interval Estimation Algorithm with Just-In-Time Modeling for PV System Operation

Tomohide Yamazaki, Shinji Wakao, Yu Fujimoto, Yasuhiro Hayashi

The 42nd IEEE Photovoltaic Specialists Conference (New Orleans, USA)

Presentation date： 2015.06
Method for Determining LDC Parameters of OLTC and Multiple SVRs in Distribution System by Using Database

Shunsuke Kawano, Shinya Yoshizawa, Yu Fujimoto, Yasuhiro Hayashi

IYCE(International Youth Conference on Energy)

Presentation date： 2015.05
Determination Method of Voltage Control Parameters Based on Input-output Relationship Database in Distribution System

Shinya Yoshizawa

2015 JST-NSF-DFG-RCN Workshop on Distributed Energy Management Systems (Arlington, VA, USA)

Presentation date： 2015.04
Development of Methodologies for Collaborative Energy Management System Using Simulation Model and Distribution NW Simulator

Yasuhiro Hayashi

2015 JST-NSF-DFG-RCN Workshop on Distributed Energy Management Systems (Arlington, VA, USA)

Presentation date： 2015.04
Multiple Scenario Forecast for Residential Energy Demands

Yu Fujimoto

2015 JST-NSF-DFG-RCN Workshop on Distributed Energy Management Systems (Arlington, VA, USA)

Presentation date： 2015.04
Robust Operation Planning Method for Integrated Solid Oxide Fuel Cells Under Uncertainty of Demand

Runa Kato, Yu Fujimoto, Yasuhiro Hayashi

International Renewable Energy Congress 2015 (IREC' 2015) (El Mouradi Palace Sousse, Tunisia)

Presentation date： 2015.03
The Basic Study for Development of a Method for Determining the LDC Parameters of LRT and SVR Using PV Output Forecasting

Shunsuke Kawano, Shinya Yoshizawa, Yu Fujimoto, Yasuhiro Hayashi

The IEEE PES Conference on Innovative Smart Grid Technologies(2015 ISGT) (Washington DC, USA)

Presentation date： 2015.02
Maximum PV Penetration Capacity Evoluation of a Novel Method for Determining LDC Control Parameters of Step Voltage Regulators

Shunsuke Kawano, Shinya Yoshizawa, Yu Fujimoto, Yasuhiro Hayashi

2014 3rd International Conference on Power Science and Engineering(ICPSE 2014) (Barcelona, Spain)

Presentation date： 2014.12
Method for Determining Line Drop Compensator Control Parameters of Low-Voltage Regulator Using Random Fores

Hiroshi Kikusato, Naoyuki Takahashi, Jun Yoshinaga, Yu Fujimoto, Yasuhiro Hayashi, Shinichi Kusagawa, Noriyuki Motegi

2014 3rd International Conference on Power Science and Engineering(ICPSE 2014) (Barcelona, Spain)

Presentation date： 2014.12
On Detection of Cyber Attacks Against Voltage Control in Distribution Power Grids

Yasunori Isozaki, Shinya Yoshizawa, Yu Fujimoto, Hideaki Ishii, Isao Ono, Takashi Onoda, Yasuhiro Hayashi

IEEE International Conference on Smart Grid Communications (Venice, Italy)

Presentation date： 2014.11
Demonstrations of Communication Standards for Demand Response and Smart House

Jun Yoshinaga, Wataru Hirohashi, Yasuhiro Hayashi

The 6th International Conference on Renewable and Distributed Energy Resources(IRED 2014) (Kyoto International Conference Center，Kyoto，Japan)

Presentation date： 2014.11
Advanced Voltage Control Method of Multipke Step Voltage Regulators in Distribution Feeder

Shinya Yoshizawa, Y.Hayashi

The 6th International Conference on Renewable and Distributed Energy Resources(IRED 2014) (Kyoto International Conference Center，Kyoto，Japan)

Presentation date： 2014.11
A Basic Study of Distribution Automation for Service Restoration in a Distribution System with Distributed Generators

Shunsuke Kawano, Y, Hayashi

The 6th International Conference on Renewable and Distributed Energy Resources(IRED 2014) (Kyoto International Conference Center，Kyoto，Japan)

Presentation date： 2014.11
Fluctuation Range Prediction of PV Output by Using Just-In-Time Modeling

Hayato Homma, Tomohide Yamazaki, Shinya Yoshizawa, Hiroshi Kikusato, Shinji Wakao, Yu Fujimoto, Yasuhiro Hayashi

The 6th World Conference on Photovoltaic Energy Conversion(WCPEC) (Kyoto International Conference Center, Kyoto, Japan)

Presentation date： 2014.11
Dynamic control method based on JIT for LVR in Distribution Systems

Naoyuki Takahashi, Hiroshi Kikusato, Jun Yoshinaga, Yasuhiro, Shinichi Kusagawa, Noriyuki Motegi

The 6th World Conference on Photovoltaic Energy Conversion(WCPEC) (Kyoto International Conference Center, Kyoto, Japan)

Presentation date： 2014.11
Evaluation of the Effectiveness of Voltage Control Methods using Acceptable Amount of PV Installation

Ryo Takahashi, Ryunosuke Miyoshi, Naoyuki Takahashi, Yasuhiro Hayashi

The 6th World Conference on Photovoltaic Energy Conversion(WCPEC) (Kyoto International Conference Center, Kyoto, Japan)

Presentation date： 2014.11
Basic Study of Voltage Control Method with Demand Response

Satoru Akagi, Jun Yoshinaga, Yasuhiro Hayashi

The 6th World Conference on Photovoltaic Energy Conversion(WCPEC) (Kyoto International Conference Center, Kyoto)

Presentation date： 2014.11
Method for Instantly Determining Line Drop Compensator Parameters of Low-Voltege Regulator Multiple Classfiers

Hiroshi Kikusato, Naoyuki Takahashi, Jun Yoshinaga, Yu Fujimoto, Yasuhiro Hayashi, Shinichi Kusagawa, Noriyuki Motegi

IEEE ISGT Europe 2014 in Istanbul (Istanbul, Turkey)

Presentation date： 2014.10
PV Output Prediction under Various Conditions of Time and Spatial Resolutions by Just-In-Time Modeling

Hayato Homma, Shinya Yoshizawa, Hiroshi Kikusato, Shinji Wakao, Yu Fujimoto, Yasuhiro Hayashi

The 29th European PV Solar Energy Conference and Exhibition (EUPVSE2014) (Amsterdam, The Netherlands)

Presentation date： 2014.09
PV OUTPUT PREDICTION UNDER VARIOUS CONDITIONS OF TIME AND SPATIAL RESOLUTIONS BY JUST-IN-TIME MODELING

Hayato HOMMA, Tomohide YAMAZAKI, Shinya YOSHIZAWA, Hiroshi KIKUSATO, Shinji WAKAO, Yu FUJIMOTO, Yasuhiro HAYASHI

The 29th European PV Solar Energy Conference and Exhibition (Amsterdam, The Netherlands)

Presentation date： 2014.09
Voltage Control of Multiple Step Voltage Regulators by Renewing Control Parameters

Shinya Yoshizawa, Yuya Yamamoto, Jun Yoshinaga, Yasuhiro Hayashi, Shunsuke Sasaki, Takaya Shigetou, Hideo Nomura

18th Power Systems Computation Conference （PSCC 2014） (Wroclaw, Poland)

Presentation date： 2014.08
VOLTAGE CONTROL AND ISSUES IN JAPAN

Yoshinaga Jun

CIGRE 2014，CIGRE C6 WG C6.30 (Paris, France)

Presentation date： 2014.08
Home Energy Management Based on Bayesian Network Considering Resident Convenience

Tomoaki Shoji, Wataru Hirohashi, Yasuhiro Hayashi

13th International Conference on Probabilistic Methods Applied to Power Systems（PMAPS2014） (Durham, England)

Presentation date： 2014.07
DEVELOPMENT OF DYNAMIC REACTIVE-POWER CONTROL METHOD WITH PV OUTPUT PREDICTION FOR SOLAR INVERTERS

Ryunosuke Miyoshi, Yasuhiro Hayashi

Grand Renewable Energy 2014 International Conference (Tokyo, Japan)

Presentation date： 2014.07
Experiment with an OPF Controller Based on HPSO-TVAC for a PV-Supplied Microgrid with BESS

Khoa Le Dinh, Yasuhiro Hayashi

IEEE Power & Energy Society General Meeting 2014, (The 2014 IEEE PES) (Washington DC, USA)

Presentation date： 2014.07
Optimal BESS Placement and Sizing based on HPSO-TVAC to Stabilize Voltage in PV- Supplied Micro-grid

Khoa Le Dinh, Yasuhiro Hayashi

The International Conference on Electrical Engineering 2014（ICEE 2014） (Ramada Plaza Jeju Hotel,Korea)

Presentation date： 2014.06
Multi-objective control method of battery Energy storage system for distribution system

Jun Yoshinaga, Satoshi Akagi Mikihiko Wada, Yasuhito Isoe, Wataru Hirohashi, Yasuhiro Hayashi

CIRED Workshop 2014 (Rome, Italy)

Presentation date： 2014.06
Dynamic Control Method for LVR based on Predictive and Dynamic Controller

Naoyuki Takahashi, Hiroshi Kikusato, Jun Yoshinaga, Yasuhiro Hayashi, Shinichi Kusawagawa, Noriyuki Motegi

The International Conference on Electrical Engineering 2014（ICEE 2014） (Ramada Plaza Jeju Hotel,Korea)

Presentation date： 2014.06
Centralized Voltage Control Method using Voltage Sensitivity Estimation in Distribution System with Mega-solar System

Ryo Takahashi, Naoyuki Takahashi, Yasuhiro Hayashi

The International Conference on Electrical Engineering 2014（ICEE 2014） (Ramada Plaza Jeju Hotel,Korea)

Presentation date： 2014.06
Basic Study on Dynamic Reactive-Power Control Method with PV Output Prediction for Solar Inverter

Ryunosuke Miyoshi, Naoyuki Takahashi, Yasuhiro Hayashi

The International Conference on Electrical Engineering 2014（ICEE 2014） (Ramada Plaza Jeju Hotel,Korea)

Presentation date： 2014.06
A Novel Grid Energy Management System in Distribution System with PVs

Shinya Yoshizawa, Hayato Homma, Yu Fujimoto, Shinji Wakao, Yasuhiro Hayashi

The International Conference on Electrical Engineering 2014（ICEE 2014） (Ramada Plaza Jeju Hotel,Korea)

Presentation date： 2014.06
Home Energy Management based on Bayesian Network considering Priority of Home Appliances

Tomoaki Shoji, Wataru Hirohashi, Yu Fujimoto, Yoshiharu Amano, Shin-ichi Tanabe, Yasuhiro Hayashi

The International Conference on Electrical Engineering 2014（ICEE 2014） (Ramada Plaza Jeju Hotel,Korea)

Presentation date： 2014.06
The Basic Study for Accelerating a Voltage Calculation Method for High-and Low- voltage Distribution System

Shunsuke Kawano, Yasuhiro Hayashi, Nobuhiko Itaya, Tomihiro Takano, Tetsufumi Ono

The International Conference on Electrical Engineering 2014（ICEE 2014） (Ramada Plaza Jeju Hotel,Korea)

Presentation date： 2014.06
Determination Method of the Configuration Minimizing Yearly Loss

Yuji Takenobu, Shunsuke Kawano, Yasuhiro Hayashi, Norihito Yasuda, Shin-ich Minato

The International Conference on Electrical Engineering 2014（ICEE 2014） (Ramada Plaza Jeju Hotel,Korea)

Presentation date： 2014.06
Effectiveness of Optimization Updating the Control Parameters of Advanced SVRs

Yuya Yamamoto, Shinya Yoshizawa, Jun Yoshinaga, Yasuhiro Hayashi, Shunsuke Sasaki, Takaya Shigeto, Hideo Nomura

The International Conference on Electrical Engineering 2014（ICEE 2014） (Ramada Plaza Jeju Hotel,Korea)

Presentation date： 2014.06
Interval Forecasting of Photovoltaic Generation Based on Quantile Regression

Genta Kikuchi, Yu Fujimoto, Yasuhiro Hayashi, Yoshikane Kojima, Shunji Nakao

INTERNATIONAL WORK-CONFERENCE ON TIME SERIES ANAALYSIS （ITISE2014） (Granada.Spain)

Presentation date： 2014.06
Verification of Efficiency of Searching Methods Determining Optimal Control Parameters of Advanced SVRs

Yuya Yamamoto, Shinya Yoshizawa, Jun Yoshinaga, Yasuhiro Hayashi, Shunsuke Sasaki, Takaya Shigetou, Hideo Nomura

ENERGYCON 2014 (Dubrovnik,Croatia)

Presentation date： 2014.05
Novel Voltage Control of Multiple Step Voltage Regulators in a Distribution System

Shinya Yoshizawa, Yuya Yamamoto, Jun Yoshinaga, Yasuhiro Hayashi, Shunsuke Sasaki, Takaya Shigetou, Hideo Nomura

Innovative Smart Grid Technologies Conference (ISGT), 2014 IEEE PES (Washington, DC, USA)

Presentation date： 2014.02
Dyanamic Voltage Control Method and Optimization for LVR in Distribution System with PV Systems

Naoyuki TAKAHASHI, Hiroshi KIKUSATO, Jun YOSHINAGA, Yasuhiro HAYASHI, Shinichi KUSAKAWA, Noriyuki MOTEGI

Innovative Smart Grid Technologies Conference (ISGT), 2014 IEEE PES (Washington, DC, USA)

Presentation date： 2014.02
Method for Determining Line Drop Compensator Parameters of Low Voltage Regulator using Support Vector Machine

Hiroshi Kikusato, Naoyuki Takahashi, Jun Yoshinaga, Yu Fujimoto, Yasuhiro Hayashi, Shinichi Kusagawa, Noriyuki Motegi

Innovative Smart Grid Technologies Conference (ISGT), 2014 IEEE PES (Washington, DC, USA)

Presentation date： 2014.02
VOLTAGE CONTROL METHOD WITH THE AMOUNT OF DEMANDE RESPONSE REDUTION

Satoru Akagi, Jun Yoshinaga, Naoyuki Takahashi, Shunsuke Kawano, Ryunosuke Misyoshi, Yasuhiro Hayashi

Presentation date： 2014
Development of Technology for Collaborative Energy Management System and Foundation for Versatile Demonstrative Research and Its Evaluation

Yu Fujimoto, Shinya Yoshizawa, Yasuhiro Hayashi

2014 Joint JST-NSF-DFG Workshop Distributed Energy Management Systems (Hawaii, USA)

Presentation date： 2014.01
Evaluation of the Effect of Solar Inverters Installed with Different Reactive Power Control Systems Types on the Distribution System

Miyoshi Ryunosuke, Ryo Takahashi, Naoyuki Takahashi, Yasuhiro Hayashi, Shuichi Ashidate

the 23rd International Photovoltaic Science and Engineering Conference (Taipei,Taiwan)

Presentation date： 2013.10
Photovoltaic Output Prediction Based on a Collection of Quantile Regression Models

Genta KIKUCHI, Yu FUJIMOTO, Yasuhiro HAYASHI, Yoshikane KOJIMA, Shunji NAKAO

the 23rd International Photovoltaic Science and Engineering Conference (Taipei,Taiwan)

Presentation date： 2013.10
Optimized Voltage Control in Distribution System with PV Using Advanced Analog Simulator

N. Takahashi, A. Otsubo, Y. Hayashi

CIGRE SC C6 COLLOQUIUM 2013 (Yokohama, Japan)

Presentation date： 2013.10
Online Optimal Power Flow Based on HPSO-TVAC Coordinates with Centralized BESS and LRT Control to Stabilize Voltage in a PV-Supplied Micro-grid

Khoa Le Dinh, Yasuhiro Hayashi

IEEE ISGT Europe 2013（ISGT） (Copenhagen, Denmark)

Presentation date： 2013.10
Evaluating the Ability of Hydroelectric Power Generation for Controlling Frequency with a Large Introduction of Wind Power Generation

Yu Matsumoto, Yasuhiro Hayashi, Tsuyoshi Tanaka

the 45th North American Power Symposium (NAPS) (New York, USA)

Presentation date： 2013.09
Coordinated BESS Control to Improve Voltage Stability of PV-Supplied Microgrid

Khoa Le Dinh, Yasuhiro Hayashi

48th International Universities' Power Engineering Conference（UPEC 2013 Dublin）

Presentation date： 2013.09
Evaluation of Improvement Effect of Voltage Quality by Reactive Power Control with Available Capacity of Residential FC Invertor

Shoichi Koinuma, Yasuhiro Hayashi, Yu Fujimoto, Takao Shinji, Yosuke Watanabe, Masayuki Tadokoro

The International Conference on Electrical Engineering (ICEE) 2013 (XIAMEN,CHINA)

Presentation date： 2013.07
Evaluation of a Cooperative Control Method for Electric Vehicles and Heat Pumps in Residential Photovoltaic Power Systems

KENTA YAMAMOTO, NAOYUKI TAKAHASHI, YU FUJIMOTO, YASUHIRO HAYASHI

The International Conference on Electrical Engineering (ICEE) 2013 (XIAMEN,CHINA)

Presentation date： 2013.07
Optimization of Fuel Cell System Operation Plans in Houses with PV Systems

Y. Taniguchi, Y. Fujimoto, Y. Hayashi

IEEE International Power and Energy Conference（PECON2012） (Kota Kinabalu, Malaysia)

Presentation date： 2012.12
Weather-Based Planning and Operation for Residential PV Systems and Storage Batteries

Ryota Suzuki, Yu Fujimoto, Yasuhiro Hayashi

IEEE International Power and Energy Conference（PECON2012） (Kota Kinabalu, Malaysia)

Presentation date： 2012.12
Verification of Loss Reduction Effect on Loss Minimum Configuration of Distribution System by Zero-Suppressed Binary Decision Diagram

Takayuki Watanabe, Yu Fujimoto, Yasuhiro Hayashi

IEEE PES Innovative Smart Grid Technologies(ISGT）2013 Conference (Washington D.C., USA)

Presentation date： 2012.12
Centralized BESS Control to Minimize Demand of PV-Supplied Micro-grid under Voltage Constraints

Le Dinh Khoa, Hayashi Yasuhiro

IEEE International Power and Energy Conference（PECON2012） (Kota Kinabalu, Malaysia)

Presentation date： 2012.12
Automatic Extraction of Basic Electricity Consumption Pattern in Households

Haoyang Shen, Hideitsu Hino, Noboru Murata, Shinji Wakao, Yasuhiro Hayashi

International Conference on Renewable Energy Research and Applications(ICRERA (Nagasaki, Japan)

Presentation date： 2012.11
Pattern Sequence-based Energy Demand Forecast Using Photovoltaic Energy Records

Yu Fujimoto, Yasuhiro Hayashi

International Conference on Renewable Energy Research and Applications(ICRERA) (Nagasaki, Japan)

Presentation date： 2012.11
Design of Electric Power distribution networks using a biologically inspired algorithm

S.Watanabe, A. Takamatsu, Y. Hayashi

1st International Conference on the Theory and Practiec of Natural Computing (Tarragona, Spain)

Presentation date： 2012.10
A National Project on Optimal Control and Demonstration of the Japanese Smart Grid for Massive Integration of Photovoltaic Systems

Akihiko Yokoyama, Hirofumi Akagi, Yasuhiro Hayashi, Kazuhiko Ogimoto, Hideo Ishii

IEEE PES ISGT Europe 2012 (Berlin, Germany)

Presentation date： 2012.10
Centralized Voltage Control Method Using Plural D-STATCOM with Controllable Dead Band in Distribution System with Renewable Energy

N.Takahashi, Y.Hayashi

IEEE PES ISGT Europe 2012 (Berlin, Germany)

Presentation date： 2012.10
Centralized Voltage Control Method of Load Ratio Control Transformer and Step Voltage Regulator for Bank Fault Restoration

S. Yoshizawa, Y. Hayashi, M. Tsuji, E. Kamiya

IEEE PES ISGT Europe 2012 (Berlin, Germany)

Presentation date： 2012.10
Evaluating Improved Generation Efficiency: One Year Using Residential PV Voltage Control With a Clustered Residential Grid-interconnected PV

Yusuke Miyamoto, Yasuhiro Hayashi

IEEE PES ISGT Europe 2012 (Berlin, Germany)

Presentation date： 2012.10
Experimental verification of advanced voltage control for penetration of PV in distribution system with IT sectionalizing switches

Y. HAYASHI, N. TAKAHASHI, Y. HANAI, E. KAMIYA, T. WATANABE, H. ISHII

2012 CIGRE (Paris, France)

Presentation date： 2012.08
Basic Study on Optimum Control Method of Storage Battery for Reduction of Output Suppression in Distribution System Including Clustered PV Systems

FUJIMORI, Taro, HAYASHI, Yasuhiro, MIYAMOTO, Yusuke

The International Conference on Electrical Engineering 2012 (ICEE2012) (Kanazawa, Japan)

Presentation date： 2012.07
Evaluation of CO2 Emission and Primary Energy Consumption Considering Variation in Demand for Collective Housing with Fuel Cells

KAMEDA, Manato, FUJIMOTO, Yu, HAYASHI, Yasuhiro

The International Conference on Electrical Engineering 2012 (ICEE2012) (Kanazawa, Japan)

Presentation date： 2012.07
Evaluation of Sectionalizing Switch Control under Centralized Voltage Control Condition in Distribution System with PV

OTSUBO, Atsushi TAKAHASHI, Naoyuki, HAYASHI, Yasuhiro

The International Conference on Electrical Engineering 2012 (ICEE2012) (Kanazawa, Japan)

Presentation date： 2012.07
Autonomous Control of Heat Pump Water Heater for Avoidance of PV Output Suppression

SHINJO, Takayuki, HAYASHI, Yasuhiro, MIYAMOTO, Yusuke

The International Conference on Electrical Engineering 2012 (ICEE2012) (Kanazawa, Japan)

Presentation date： 2012.07
Voltage Control Method Using Centralized Control of Dead Band of D-STATCOM in Distribution System with Renewable Energy

TAKAHASHI, Naoyuki, HAYASHI, Yasuhiro

The International Conference on Electrical Engineering 2012 (ICEE2012) (Kanazawa, Japan)

Presentation date： 2012.07
Evaluation of Voltage Control Effect for Data Acquisition Period Length from SCADA with IT Switches

UDAGAWA, Tsuyoshi HAYASHI, Yasuhiro, TAKAHASHI, Naoyuki, MATSUURA, Yasuo MORITA, Tomohiko, MINAMI, Masahiro

The International Conference on Electrical Engineering 2012 (ICEE2012) (Kanazawa, Japan)

Presentation date： 2012.07
Voltage Control Method of LRT and SVR in Distribution System with PV systems corresponding to Bank Fault Restoration

YOSHIZAWA, Shinya, HAYASHI, Yasuhiro, TSUJI, Masaki, KAMIYA, Eiji

The International Conference on Electrical Engineering 2012 (ICEE2012) (Kanazawa, Japan)

Presentation date： 2012.07
Voltage Control Method Using Statcom with Variable Dead Band Installed Weight Coefficient In Distribution Systems with PV System

N. Takahashi, Y. Hayashi

21st International Photovoltaic Science and Engineering Conference(PVSEC-21) (Fukuoka, Japan)

Presentation date： 2011.11
Voltage Estimation and Control of Distribution Feeders with Distributed Generationd Using It Switches Data

S. Takahashi, Y. Hayashi

21st International Photovoltaic Science and Engineering Conference(PVSEC-21) (Fukuoka, Japan)

Presentation date： 2011.11
Optimization of Reactive Power Control of Clustered Residential Grid-Interconnected PV Systems

Y. Miyamoto, Y. Hayashi

21st International Photovoltaic Science and Engineering Conference(PVSEC-21) (Fukuoka, Japan)

Presentation date： 2011.11
Cooperative Power Quality Control by Photovoltaic Systems

S. Kawasaki, M. Tanaka, H. Taoka, J. Matsuki, Y. Hayashi

IEEE PES Conference on Innovative Smart Grid Technologies (ISGT Asia 2011) (Perth, Australia)

Presentation date： 2011.11
Three-Phase Short-Circuit Fault Locator in Loop Shaped Distribution System with Inverter Based Distributed Generations

D. Iioka, Y. Hayashi

the 17th Power Systems Computation Conference (PSCC'11) (Stockholm, Sweden)

Presentation date： 2011.08
Cooperative Voltage Control and Improvement of Voltage Imbalance by STATCOMs in Response to Extensive Interconnection with Distribution System of Renewable Energy Resources

S. Kawasaki, Y. Hayashi, N. Takahashi

the 17th Power Systems Computation Conference (PSCC'11) (Stockholm, Sweden)

Presentation date： 2011.08
Distribution Line Structure and Generation Efficiency Improvement: a Clustered Residential Grid-Interconnected PV

Y. Miyamoto, Y. Hayashi

the 17th Power Systems Computation Conference (PSCC'11) (Stockholm, Sweden)

Presentation date： 2011.08
Dependence of Distribution Line Loss on Real and Reactive Power of Home Appliances

D.Iioka, Y.Hayashi

17th International Conference on Electrical Engineering (ICEE) (Hong Kong)

Presentation date： 2011.07
Evaluation of Optimal Capacity of Residential Storage Battery to Smooth Output of PV Systems in Low-voltage Distribution System

H. Sugiura, S. Kawasaki, Y. Hayashi

17th International Conference on Electrical Engineering (ICEE) (Hong Kong)

Presentation date： 2011.07
Optimal Generation Output Dispatch to Minimize Transmission Congestion and Loss for Frequency Deviation by Renewable Energy Sources

H. Suzuki, Y. Hayashi, T. Tanaka

17th International Conference on Electrical Engineering (ICEE) (Hong Kong)

Presentation date： 2011.07
Experimental Analysis on Influences of Harmonic Voltage at High-Voltage Network on Harmonic Current at Medium-Voltage Network

J. Inagaki, Y. Hayashi, Y. Tada

17th International Conference on Electrical Engineering (ICEE) (Hong Kong)

Presentation date： 2011.07
Optimal Allocation of Plural SVCs for PV Penetration

K. Konishi, Y. Hayashi

17th International Conference on Electrical Engineering (ICEE) (Hong Kong)

Presentation date： 2011.07
Evaluation of Reduction Effect of Inverter Capacity by Cooperation of Binary Control and Storage Battery in Clustered Residential PV Systems

K. Murahashi, Y. Hayashi, T. Hayashi, Y. Okuno, T. Funahashi

17th International Conference on Electrical Engineering (ICEE) (Hong Kong)

Presentation date： 2011.07
Improvement of Power Quality in Distribution System by Cooperative Control of Power Conditioner Systems

M. Tanaka, S. Kawasaki, H. Taoka, J. Matsuki, Y. Hayashi

17th International Conference on Electrical Engineering (ICEE) (Hong Kong)

Presentation date： 2011.07
Voltage Control Method Using Plural STATCOMs with Variable Dead Band for Penetration of Photovoltaic Generation System

N. Takahashi, Y. Hayashi

17th International Conference on Electrical Engineering (ICEE) (Hong Kong)

Presentation date： 2011.07
Optimal Cooperated Planning and Operation of Residential PV System and Battery Energy Storage System

R. Suzuki, Y. Hayashi

17th International Conference on Electrical Engineering (ICEE) (Hong Kong)

Presentation date： 2011.07
Minimum Required Available Capacity of Clustered Gas Engine Systems for Compensation of Output Fluctuation of PV Systems

S. Hoshina, Y. Hayashi

17th International Conference on Electrical Engineering (ICEE) (Hong Kong)

Presentation date： 2011.07
Autonomous Decentralized Voltage Control Using Available Capacity of Fuel Cell Systemunder High Penetration of PV System

S. Sano, Y. Hayashi, T. Shinji, S. Tsujita

17th International Conference on Electrical Engineering (ICEE) (Hong Kong)

Presentation date： 2011.07
Determination Method of Optimal Allocation of SVR in Distribution Feeders with Renewable Energy Sources

S. Takahashi, Y. Hayashi, Y. Tsuji, E. Kamiya

17th International Conference on Electrical Engineering (ICEE) (Hong Kong)

Presentation date： 2011.07
Evaluation of Voltage Control Method in Distribution System with PV Systems during Bank Fault Restoration

S. Yoshizawa, Y. Hayashi

17th International Conference on Electrical Engineering (ICEE) (Hong Kong)

Presentation date： 2011.07
Verification of Effect on Reduction of Output Suppression by Introducing Storage Battery for Residential Section Including Clustered Photovoltaic Power Systems

T. Fujimori, Y. Hayashi, Y. Miyamoto

17th International Conference on Electrical Engineering (ICEE) (Hong Kong)

Presentation date： 2011.07
Reduction Effect of Output Suppression by Time-shifting the Load of Heat Pump Boiler for Clustered Residential Grid-interconnected Photovoltaic Power Systems

T. Shinjo, Y. Hayashi, Y. Miyamoto

17th International Conference on Electrical Engineering (ICEE) (Hong Kong)

Presentation date： 2011.07
Verifying the Avoidance Output Suppression Loss Effect: Residential PV Reactive Power Control of a Clustered Residential Grid-interconnected PV System

Y. Miyamoto, Y. Hayash

17th International Conference on Electrical Engineering (ICEE) (Hong Kong)

Presentation date： 2011.07
Evaluation of Optimal Operation of Residential PEFC System with Exhaust Heat Use for Heating and Hot Water

Y. Taniguchi, Y. Hayashi

17th International Conference on Electrical Engineering (ICEE) (Hong Kong)

Presentation date： 2011.07
Measured Impedance at Incoming Feeder of Distributed Resources Interconnected to Loop-Shaped Distribution System

D.Iioka, Y.Hayashi

IEEE Power & Energy Society General Meeting (Michigan, USA)

Presentation date： 2011.07
Evaluating improved generation efficiency: One year using residential PV voltage control with a clustered residential grid-interconnected PV

Y. Miyamoto, Y. Hayashi

IEEE Power & Energy Society General Meeting (Michigan, USA)

Presentation date： 2011.07
PVシステム群におけるオンオフ制御と蓄電池制御の協調によるインバータ容量削減効果

電気学会全国大会

Presentation date： 2011.03
HEMS住宅を活用した系統電圧管理のPV導入限界量の面からみた評価

電気学会全国大会

Presentation date： 2011.03
ＬＲＴとＰＶシステム群の力率制御による協調型電圧制御法

電気学会全国大会

Presentation date： 2011.03
配電ネットワークの事故復旧支援手法の拡張

電気学会全国大会

Presentation date： 2011.03
アクティブフィルタ機能を有する単相PCSによる系統の高調波分布の解析

電気学会全国大会

Presentation date： 2011.03
再生可能エネルギー電源の出力変動と分布を考慮した周波数変動調整用発電機の最適出力配分

電気学会全国大会

Presentation date： 2011.03
動的負荷モデルの精度向上と負荷パラメータの推定

電気学会全国大会

Presentation date： 2011.03
住宅内電力需要のモデリングに関する一考察

電気学会全国大会

Presentation date： 2011.03
PV群の出力変動補償に要するGE群の最小空き容量の評価

電気学会全国大会

Presentation date： 2011.03
家庭用太陽光発電システム大量導入時におけるHP給湯器の負荷シフトによる抑制量低減効果

電気学会全国大会

Presentation date： 2011.03
食・物流・環境・エネルギーの連鎖による「スマートシナジーグリッド」の提案

電気学会全国大会

Presentation date： 2011.03
冬期における排熱暖房利用を考慮した家庭用PEFCの最適運転計画の評価

電気学会全国大会

Presentation date： 2011.03
系統電圧の不平衡と逸脱余裕量の改善を目的とした住宅用燃料電池の自律分散型電圧制御

電気学会全国大会

Presentation date： 2011.03
複数台SVCの最適配置パターンの評価

電気学会全国大会

Presentation date： 2011.03
重み係数付き不感帯可変SVCを用いた電圧制御手法

電気学会全国大会

Presentation date： 2011.03
集中型電圧制御におけるLRTとの協調制御を考慮したSVRの最適配置決定手法

電気学会全国大会

Presentation date： 2011.03
STATCOMによる系統の電圧制御および電圧不平衡改善手法

電気学会全国大会

Presentation date： 2011.03
センサ開閉器情報に基づいた集中型電圧制御方式の計測周期・不感帯整定に関する基礎検討

電気学会全国大会

Presentation date： 2011.03
電圧逸脱軒数の最小化を目的としたバンク事故復旧時における電圧制御手法の評価

電気学会全国大会

Presentation date： 2011.03
低圧配電系統におけるPV出力の平滑化を目的とした併設蓄電池の最小容量の評価

電気学会全国大会

Presentation date： 2011.03
天気予報に基づく住宅用太陽光発電・蓄電池の最適導入量と最適運用の決定手法

電気学会全国大会

Presentation date： 2011.03
配電用変電所の電圧・電流から算出するインピーダンスによる故障点標定の精度

電気学会全国大会

Presentation date： 2011.03
住宅用太陽光発電システム多数台連系時の無効電力制御機能による出力抑制回避効果の検証

電気学会全国大会

Presentation date： 2011.03
太陽光発電システム多数台連系時の住宅設置用蓄電池の導入による出力抑制量低減の検証

電気学会全国大会

Presentation date： 2011.03
PV大量連系配電系統における不感帯可変SVCによる電圧制御

平成22年電気学会電力技術・電力系統技術合同研究会

Presentation date： 2010.09
PVが導入された配電系統のパンク事故復旧時における電圧逸脱地域最小化手法

平成22年電気学会電力技術・電力系統技術合同研究会

Presentation date： 2010.09
センサ開閉器区間情報を用いた電圧推定に基づくLRTとSVRによる複数フィーダの集中型電圧制御手法

平成22年電気学会電力技術・電力系統技術合同研究会

Presentation date： 2010.09
分散型電源の導入拡大に対応した配電系統さいてき厚生に関する基礎研究

平成22年電気学会電力技術・電力系統技術合同研究会

Presentation date： 2010.09
再生可能エネルギーによる周波数変動の送電線混雑管理を目的とした発電機の出力配分

平成22年電気学会電力技術・電力系統技術合同研究会

Presentation date： 2010.09
PSOによるパラメータ推定を適用した動的負荷のモデル化

平成22年電気学会電力技術・電力系統技術合同研究会

Presentation date： 2010.09
PVシステム軍におけるオンオフ制御と蓄電池を用いた銃砲電制御の協調による安定化制御の評価

平成22年電気学会電力技術・電力系統技術合同研究会

Presentation date： 2010.09
家庭用太陽光発電システム多数台連系時の出力抑制回避の最大化を目的とした電圧上昇抑制動作パラメータの整定値の評価

平成22年電気学会電力技術・電力系統技術合同研究会

Presentation date： 2010.09
PVの大量導入における複数台SVCの最適設置箇所に関する研究

平成22年電気学会電力技術・電力系統技術合同研究会

Presentation date： 2010.09
太陽光発電大量導入時の電圧上昇と電圧不平衡率の改善を目的とした燃料電池の無効電力制御に関する研究

平成22年電気学会電力技術・電力系統技術合同研究会

Presentation date： 2010.09
単相連系PVの導入拡大が配電系統の電力品質に与える影響評価

平成22年電気学会電力技術・電力系統技術合同研究会

Presentation date： 2010.09
スマートハウスを活用した配電系統における負荷管理手法の評価

平成22年電気学会電力技術・電力系統技術合同研究会

Presentation date： 2010.09
PV群集中管理を目的としたPV導入エリアの決定に関する研究

平成22年電気学会電力技術・電力系統技術合同研究会

Presentation date： 2010.09
LRTと太陽光発電システム群の力率制御による協調型電圧制御法

平成22年電気学会電力技術・電力系統技術合同研究会

Presentation date： 2010.09
センサ開閉器情報を利用した複数台PCSによる配電ネットワークにおける総合電圧ひずみ率抑制手法」

平成22年電気学会電力技術・電力系統技術合同研究会

Presentation date： 2010.09
PCSによる系統の電圧不平衡改善および高調波抑制

平成22年電気学会電力技術・電力系統技術合同研究会

Presentation date： 2010.09
分散型電源の連系線電圧・電流から算出する測距インピーダンスによる故障点標定

平成22年電気学会電力技術・電力系統技術合同研究会

Presentation date： 2010.09
PV 出力最大化と配電系統電圧適正化を目的としたヒートポンプ給湯器と電気自動車用充電器の協調制御手法

平成22年電気学会電力・エネルギー部門大会

Presentation date： 2010.09
系統連系されたインバータ型分散型電源への距離リレー適用に関する一考察

平成22年電気学会電力・エネルギー部門大会

Presentation date： 2010.09
太陽光発電が大量導入された配電系統における負荷管理手法

平成22年電気学会電力・エネルギー部門大会

Presentation date： 2010.09
事故復旧制御における分散型電源の再連系の利用

平成22年電気学会電力・エネルギー部門大会

Presentation date： 2010.09
開閉器情報を利用したPCSによる複数フィーダでの総合電圧ひずみ率抑制手法に関する研究

平成22年電気学会電力・エネルギー部門大会

Presentation date： 2010.09
系統電圧維持を目的とした太陽光発電システム群の力率制御手法」

平成22年電気学会電力・エネルギー部門大会

Presentation date： 2010.09
燃料電池の無効電力制御を用いた配電系統の電圧制御と電圧不平衡抑制の効果に関する基礎研究

平成22年電気学会電力・エネルギー部門大会

Presentation date： 2010.09
PV 大量導入に対応した送電系統遮断器と配電系統開閉器の協調制御による送配電損失の最小化手法

平成22年電気学会電力・エネルギー部門大会

Presentation date： 2010.09
PV システム群のオンオフ制御による蓄電池容量削減効果と利用率の評価

平成22年電気学会電力・エネルギー部門大会

Presentation date： 2010.09
「複数台SVC による系統電圧制御効果の評価

平成22年電気学会電力・エネルギー部門大会

Presentation date： 2010.09
「PV の連系容量と連系地点に応じたSVC の最適設置箇所に関する研究

平成22年電気学会電力・エネルギー部門大会

Presentation date： 2010.09
センサ開閉器計測情報に基づいた複数フィーダの電圧推定・制御手法

平成22年電気学会電力・エネルギー部門大会

Presentation date： 2010.09
PV 出力変動補償を目的としたPV 群とGE の協調制御に関する基礎研究

平成22年電気学会電力・エネルギー部門大会

Presentation date： 2010.09
再生可能エネルギー大量導入による周波数変動に対応した発電機出力の最適化に関する基礎検討

平成22年電気学会電力・エネルギー部門大会

Presentation date： 2010.09
系統電圧維持を目的としたPV システム出力平滑化のための蓄電池容量に関する研究

平成22年電気学会電力・エネルギー部門大会

Presentation date： 2010.09
並列計算環境による配電系統構成決定時間短縮効果の検討

平成22年電気学会電力・エネルギー部門大会

Presentation date： 2010.09
ループ型配電系統に連系された分散型電源の電圧・電流から算出する測距インピーダンス

電気関係学会東海支部連合大会

Presentation date： 2010.08
分散型電源の連系線電圧・電流から算出する測距インピーダンスと系統構成との関係

電気設備学会全国大会

Presentation date： 2010.08
配電系統に連系されたインバータ型分散型電源の短絡電流最大値と系統構成との関係

平成22年電気学会全国大会

Presentation date： 2010.03
大規模PV導入が配電系統に及ぼす影響の評価

平成22年電気学会全国大会

Presentation date： 2010.03
PVが大量導入された配電系統におけるHP給湯器とEV充電器の運用形態に関する評価

平成22年電気学会全国大会

Presentation date： 2010.03
太陽光発電システム群の力率制御手法の実験による検証

平成22年電気学会全国大会

Presentation date： 2010.03
分散型電源連系インバータによる系統規模での総合電圧ひずみ率抑制方法に関する研究

平成22年電気学会全国大会

Presentation date： 2010.03
再生可能エネルギー電源が連系された次世代ループ配電系統の電圧維持能力の検証

平成22年電気学会全国大会

Presentation date： 2010.03
事故区間分離を考慮したループ配電系統の電圧制御に関する検討

平成22年電気学会電力技術/電力系統技術/半導体電力変換合同研究会

Presentation date： 2010.03
センサ開閉器からの計測情報を利用した配電系統の集中型(LRT・SVR)電圧制御手法

平成22年電気学会電力技術/電力系統技術/半導体電力変換合同研究会

Presentation date： 2010.03
LRTとの制御分担を考慮したSVCの瞬時電圧制御法およびSVCの定格容量と制御パラメータの決定手法

平成22年電気学会電力技術/電力系統技術/半導体電力変換合同研究会

Presentation date： 2010.03
蓄電池容量最小化と適正電圧維持を目的とした風力発電出力変動平滑化

平成22年電気学会電力技術/電力系統技術/半導体電力変換合同研究会

Presentation date： 2010.03
PV群のオンオフ制御台数とならし効果による出力安定化の検証

平成22年電気学会電力技術/電力系統技術/半導体電力変換合同研究会

Presentation date： 2010.03
PV出力最大化と配電系統電圧適正化を目的としたヒートポンプ給湯器と電気自動車用充電器の協調運用決定手法の基礎検討

平成22年電気学会電力技術/電力系統技術/半導体電力変換合同研究会

Presentation date： 2010.03
再生可能エネルギーとの調和を目指した先進グリッド技術

電気四学会関西支部専門講習会

Presentation date： 2010.02
太陽光発電システム群の多目的力率制御手法

電気学会電力系統技術研究会

Presentation date： 2010.01
センサ開閉器情報を利用した分散型電源連系インバータによる系統の総合電圧ひずみ率抑制方法に関する基礎研究

電気学会電力系統技術研究会

Presentation date： 2010.01
太陽光発電設置住宅におけるヒートポンプ給湯機と電気自動車用充電器の協調制御手法

PSE-10-005 （2010）

Presentation date： 2010
PV導入形態が配電系統に及ぼす影響に関する基礎検討

PSE-10-007 （2010）

Presentation date： 2010
太陽光発電システム群の多目的力率制御手法

電気学会電力系統技術研究会

Presentation date： 2010.01
センサ開閉器情報を利用した分散型電源連系インバータによる系統の総合電圧ひずみ率抑制方法に関する基礎研究

電気学会電力系統技術研究会

Presentation date： 2010.01
太陽光発電設置住宅におけるヒートポンプ給湯機と電気自動車用充電器の協調運用スケジュール決定手法

電気学会電力系統技術研究会

Presentation date： 2010.01
PV導入による電力ロス削減効果に関する基礎検討

電気学会電力系統技術研究会

Presentation date： 2010.01
配電系統におけるSVC の定格容量と制御パラメータ決定手法

PE-09-90/PSE-09-98（2009）

Presentation date： 2009
並列計算技術の開閉器制御手法への適用に関する基礎検討

PE-09-83/PSE-09-91（2009）

Presentation date： 2009
センサ開閉器から得られる計測情報を活用した配電系統の集中型(LRT・SVR)電圧制御手法の実験的検証

PE-09-92/PSE-09-100（2009）

Presentation date： 2009
再生可能エネルギー源が連系されたループ配電系統の電圧制御に関する検討

PE-09-94/PSE-09-102C

Presentation date： 2009
分散型電源連系インバータのPQ 制御及びAF 動作による系統の電圧ひずみ率抑制方法の検討

PE-09-117/PSE-09-125（2009）

Presentation date： 2009
階層型マイクログリッドの一次エネルギー消費量およびCO2 排出量削減効果の季節別検証

PE-09-149/PSE-09-157（2009）

Presentation date： 2009
自然エネルギー利用型分散型電源と配電ネットワークとの協調運用形態の検証実験

PE-09-166/PSE-09-174（2009）

Presentation date： 2009
蓄電池容量最小化を目的とした風力発電出力の最適平滑化時定数の決定

PE-09-168/PSE-09-176（2009）

Presentation date： 2009
太陽光発電システム群の総有効電力出力最大化を目的とした力率制御手法

PE-09-170/PSE-09-178（2009）

Presentation date： 2009
太陽光発電設置住宅におけるヒートポンプ給湯機と電気自動車充電器の運転スケジュール決定手法

PE-09-171/PSE-09-179（2009）

Presentation date： 2009
配電損失削減とCO2 排出削減に貢献可能な自然エネルギー利用型分散型電源出力範囲の評価

PE-09-177/PSE-09-185（2009）

Presentation date： 2009
PV 群のオンオフ制御による蓄電池容量削減効果の検証

PE-09-179/PSE-09-187（2009）

Presentation date： 2009
PV 群のオンオフ制御台数による出力安定化効果の評価

PE-09-180/PSE-09-188（2009）

Presentation date： 2009
配電系統の電圧推定手法を適用した送出し電圧制御の実験的検証

6-015 （2009）

Presentation date： 2009
太陽光発電システム群の多目的力率制御のANSWER による検証実験

6-019（2009）

Presentation date： 2009
模擬実験装置を用いた損失最小化制御手法の検証

6-021（2009）

Presentation date： 2009
動的負荷特性の同定のための誘導機モデルのパラメータ推定

6-154

Presentation date： 2009
LRT とSTATCOM による協調電圧制御のANSWER を用いた検証実験

6-261（2009）

Presentation date： 2009
タップ切替回数と電圧プロファイルに基づいた電圧制御器（LRT, SVR）の不感帯幅の決定

6-267（2009）

Presentation date： 2009
オンオフ制御による太陽光発電システム群の制御遅れ時間に対する出力目標値設定誤差の評価

6-279（2009）

Presentation date： 2009
階層型マイクログリッドにおけるGEのオンライン運用の一次エネルギー消費量とCO2 排出量の削減効果

6-318（2009）

Presentation date： 2009
並列計算環境下における開閉器制御手法の高速化

6-027（2009）

Presentation date： 2009
配電系統に設置される複数台SVC の協調整定に関する検討

P15（2009）

Presentation date： 2009
ANSWER による太陽光発電システム群の力率制御手法の検証実験

P16（2009）

Presentation date： 2009
分散型電源系統連系インバータのPQ 制御による系統の電圧ひずみ率抑制方法の検討

P24（2009）

Presentation date： 2009
配電系統模擬実験設備を用いた分散型電源連系が系統の高調波電流に及ぼす影響の解析

平成20年電気学会全国大会

Presentation date： 2008
階層型マイクログリッドにおける熱電併給運用の評価

平成20年電気学会全国大会

Presentation date： 2008
適正電圧維持を目的とした風力出力変動平滑化制御の最適時定数の決定に関する基礎実験

平成20年電気学会全国大会

Presentation date： 2008
PV システム群のオン/オフ制御による出力安定化

平成20年電気学会全国大会

Presentation date： 2008
分散型電源の連系課題解決支援実験システム(ANSWER)の構築

平成20年電気学会全国大会

Presentation date： 2008
定格容量を考慮したSVC の制御パラメータ決定手法

平成20年電気学会全国大会

Presentation date： 2008
燃料電池設置型集合住宅における最適熱電併給運用

平成20年電気学会全国大会

Presentation date： 2008
分散型電源の連系が配電ネットワークに及ぼす影響の面的解析

平成18年度電気学会電力系統技術研究会

Presentation date： 2007
配電系統に連系される風力発電機の連系可能最大出力の評価

平成18年度電気学会電力系統技術研究会

Presentation date： 2007
燃料電池設置型集合住宅での戸別間電力融通による最適な熱電併給運用

平成19年電気学会全国大会

Presentation date： 2007
配電ネットワークにおけるアクティブフィルタの最適設置箇所に関する基礎研究

平成19年電気学会全国大会

Presentation date： 2007
キャンパス配電系統における電力品質の季節変化

平成19年電気学会全国大会

Presentation date： 2007
キャンパス配電系統における高調波インピーダンスに関する研究

平成19年電気学会全国大会

Presentation date： 2007
配電ネットワーク模擬実験設備を用いた分散型電源協調型の配電ネットワーク制御方式の検証

平成19年電気学会全国大会

Presentation date： 2007
配電系統模擬実験による分散型電源と配電系統との協調運用形態の検証

平成18年度電気学会電力技術・電力系統技術・半導体電力変換技術合同研究会

Presentation date： 2007
配電損失最小化による年間CO2排出削減量の簡易評価手法

平成19年電気学会全国大会

Presentation date： 2007
分散型電源の連系可能最大出力の観点から見た送出し電圧制御方式の比較

平成19年電気学会全国大会

Presentation date： 2007
センサ内蔵開閉器からの系統情報に基づいた変電所LDCの最適整定値の決定手法の開発

平成19年電気学会全国大会

Presentation date： 2007
マイクログリッドにおけるオンライン電源運用最適化手法の妥当性の検証

平成19年電気学会全国大会

Presentation date： 2007
配電ネットワーク模擬実験による分散型電源と配電ネットワークとの協調運用形態の検証

平成19年電気学会電力技術・電力系統技術合同研究会

Presentation date： 2007
分散型電源が連系された配電ネットワークにおけるアクティブフィルタの最適設置箇所に関する研究

平成19年電気学会電力技術・電力系統技術合同研究会

Presentation date： 2007
集合住宅における燃料電池の最適運用計画決定手法

平成19年電気学会電力技術・電力系統技術合同研究会

Presentation date： 2007
分散型電源が連系された配電系統模擬実験設備での高調波解析

平成19年電気学会電力技術・電力系統技術合同研究会

Presentation date： 2007
配電系統における変電所LDCの最適整定値決定手法の検討

平成19年電気学会電力技術・電力系統技術合同研究会

Presentation date： 2007
パレート最適解を用いた配電ネットワーク構成の多目的最適化手法

平成19年電気学会電力技術・電力系統技術合同研究会

Presentation date： 2007
キャンパス配電系統における電力需要の年変化に関する一考察

平成19年度電気関係学会北陸支部連合大会

Presentation date： 2007
階層型マイクログリッドの最適熱電併給に関する基礎検討

平成19年度電気関係学会北陸支部連合大会

Presentation date： 2007
配電系統模擬実験設備を用いた分散型電源連系パターンの違いによる高調波解析

平成19年度電気関係学会北陸支部連合大会

Presentation date： 2007
配電系統模擬実験による風力出力変動平滑化制御の最適時定数の決定

平成19年度電気関係学会北陸支部連合大会

Presentation date： 2007
分散型電源と配電ネットワークとの協調運用に関する研究

平成19年度電気関係学会北陸支部連合大会

Presentation date： 2007
分散型電源連系配電ネットワークにおけるアクティブフィルタの最適設置箇所に関する研究

平成19年度電気関係学会北陸支部連合大会

Presentation date： 2007
DG多数台連系前後での配電ネットワーク構成候補の評価実験

平成19年度電気関係学会北陸支部連合大会

Presentation date： 2007
燃料電池設置型集合住宅における最適運用計画の季節別比較

平成19年度電気関係学会北陸支部連合大会

Presentation date： 2007
集合住宅における燃料電池の導入についての検討

平成19年度電気関係学会北陸支部連合大会

Presentation date： 2007
燃料電池設置型集合住宅における最適な熱電併給運用の決定手法

平成19年電気学会電力・エネルギー部門大会

Presentation date： 2007
階層型マイクログリッドの最適運用に関する基礎研究

平成19年電気学会電力・エネルギー部門大会

Presentation date： 2007
配電ネットワーク模擬実験設備を用いた分散型電源多数台連系前後での配電ネットワーク構成の多面的評価

平成19年電気学会電力・エネルギー部門大会

Presentation date： 2007
分散型電源と配電ネットワークとの協調運用形態の検証実験

平成19年電気学会電力・エネルギー部門大会

Presentation date： 2007
適正電圧維持を目的とした風力出力変動平滑化制御の最適時定数の配電系統模擬実験による決定

平成19年電気学会電力・エネルギー部門大会

Presentation date： 2007
系統構成を考慮した分散型電源連系配電ネットワークにおけるアクティブフィルタの最適設置箇所に関する研究

平成19年電気学会電力・エネルギー部門大会

Presentation date： 2007
キャンパス配電系統における電力品質の年間変化に関する検討

平成19年電気学会電力・エネルギー部門大会

Presentation date： 2007
インバータ利用分散型電源が連系された配電系統模擬実験設備での高調波解析

平成19年電気学会電力・エネルギー部門大会

Presentation date： 2007
配電系統における風力発電システムの連系可能最大出力の算出手法に関する検討

平成19年度電気関係学会北陸支部連合大会

Presentation date： 2007
配電損失最小構成の年間変更頻度に対する損失削減効果の評価

平成19年度電気関係学会北陸支部連合大会

Presentation date： 2007
電力品質に対するパレート最適解を用いた配電ネットワーク構成の多目的最適化

平成19年度電気関係学会北陸支部連合大会

Presentation date： 2007
配電系統におけるLRTとSVRの統合整定手法の提案

平成19年度電気関係学会北陸支部連合大会

Presentation date： 2007
同期発電機内部の空隙磁束を用いた送電線事故判定

平成19年度電気関係学会北陸支部連合大会

Presentation date： 2007
サイリスタ制御直列コンデンサによる不安定現象に関する研究

平成19年度電気関係学会北陸支部連合大会

Presentation date： 2007
TCSC点弧角自動制御モデルを用いた電力系統の動揺抑制効果のためのディジタル制御に関する研究

平成19年度電気関係学会北陸支部連合大会

Presentation date： 2007
実測データを用いた配電用変圧器の最適LDC整定値の決定

平成19年電気学会電力・エネルギー部門大会

Presentation date： 2007
配電損失最小化に貢献可能な分散型電源出力範囲の算定

平成19年電気学会電力・エネルギー部門大会

Presentation date： 2007
配電損失とバンク効率に対するパレート最適解を用いた配電ネットワーク構成の多目的最適化

平成19年電気学会電力・エネルギー部門大会

Presentation date： 2007
配電系統におけるLRTとSVRの統合整定手法の検討

平成19年電気学会電力・エネルギー部門大会

Presentation date： 2007
分散型電源の連系許容出力範囲の算出手法

平成17年電気学会全国大会

Presentation date： 2005
分散型電源が連系された配電ネットワークにおける最適送出し電圧決定手法

平成17年電気学会全国大会

Presentation date： 2005
分散型電源の一斉解列を考慮した配電系統の事故復旧

平成17年電気学会全国大会

Presentation date： 2005
分散型電源が連系された配電系統での単相負荷の接続替えによる三相電圧不平衡の改善手法

平成17年電気学会全国大会

Presentation date： 2005
実測データを用いた高調波解析用負荷モデルのパラメータ推定手法

平成17年電気学会全国大会

Presentation date： 2005
空隙磁束を用いた送電線事故標定手法の検討

平成17年電気学会全国大会

Presentation date： 2005
配電ネットワークの標準解析モデルの構築

平成17年電気学会電力・エネルギー部門大会

Presentation date： 2005
電圧不平衡率面から見た配電ネットワーク構成の評価

平成17年電気学会電力・エネルギー部門大会

Presentation date： 2005
電圧歪率面から見た配電ネットワーク構成の評価

平成17年電気学会電力・エネルギー部門大会

Presentation date： 2005
配電ネットワーク構成の多面的評価

平成17年電気学会電力・エネルギー部門大会

Presentation date： 2005
ループ状配電系統潮流計算への三相繰返潮流計算手法の適用

平成17年電気学会電力・エネルギー部門大会

Presentation date： 2005
新規連系の分散型電源に対する連系許容出力範囲の評価

平成17年電気学会電力・エネルギー部門大会

Presentation date： 2005
3分割3連系配電ネットワークにおける配電損失最小構成決定手法

平成17年電気学会電力・エネルギー部門大会

Presentation date： 2005
バンク事故による分散型電源の一斉解列を考慮した配電系統事故復旧手法

平成17年電気学会電力・エネルギー部門大会

Presentation date： 2005
競争的環境下における健全時と事故時を考慮したTCSCの効果的運用に関する研究

平成17年電気学会電力・エネルギー部門大会

Presentation date： 2005
新規連系の分散型電源に対する連系許容出力範囲の評価

平成17年電気学会電力・エネルギー部門大会

Presentation date： 2005
電圧不平衡率面から見た配電ネットワーク構成の評価

平成17年電気学会電力・エネルギー部門大会

Presentation date： 2005
電圧歪率面から見た配電ネットワーク構成の評価

平成17年電気学会電力・エネルギー部門大会

Presentation date： 2005
競争的環境下における健全時と事故時を考慮したＴＣＳＣの効果的運用

平成17年電気学会電力・エネルギー部門大会

Presentation date： 2005
バンク事故による分散型電源の一斉解列を考慮した配電系統事故復旧手法

平成17年電気学会電力・エネルギー部門大会

Presentation date： 2005
3分割3連系配電ネットワーク構成における電圧歪率の評価

平成17年電気学会電力技術・電力系統技術合同研究会

Presentation date： 2005
3分割3連系配電ネットワーク構成における電圧不平衡率の評価

平成17年電気学会電力技術・電力系統技術合同研究会

Presentation date： 2005
3分割3連系配電ネットワーク構成の多面的評価

平成17年電気学会電力技術・電力系統技術合同研究会

Presentation date： 2005
広域同期計測システムを用いたキャンパス配電系統の電力品質の検討

平成17年電気学会電力技術・電力系統技術合同研究会

Presentation date： 2005
学内電力監視システムを用いた配電系統の電力品質の検討

平成17年度電気関係学会北陸支部連合大会

Presentation date： 2005
TCSCによる電力系統の動揺抑制効果向上のためのディジタル制御の検討

平成17年度電気関係学会北陸支部連合大会

Presentation date： 2005
送電線事故時における発電機空隙磁束の変動と事故標定への利用

平成17年電気学会電力技術・電力系統技術合同研究会

Presentation date： 2005
ループ状配電系統への三相繰返潮流計算手法の適用に関する基礎検討

平成17年電気学会電力技術・電力系統技術合同研究会

Presentation date： 2005
数理的最適性が保証された３分割３連系配電損失最小構成の決定手法

平成17年電気学会電力技術・電力系統技術合同研究会

Presentation date： 2005
分散型電源の連系を考慮した配電系統のバンク事故復旧手法

平成17年電気学会電力技術・電力系統技術合同研究会

Presentation date： 2005
無負荷変圧器における過電圧の抑制に関する実験と考察

平成17年電気学会電力技術・電力系統技術合同研究会

Presentation date： 2005
サイリスタ制御直列コンデンサにおける不安定現象の解析

平成17年電気学会電力技術・電力系統技術合同研究会

Presentation date： 2005
TCSCによる系統安定度向上に関する実験と考察

平成17年電気学会電力技術・電力系統技術合同研究会

Presentation date： 2005
同期発電機の制動巻線による分散型電源連系時の三相不平衡の改善

平成17年電気学会電力技術・電力系統技術合同研究会

Presentation date： 2005
競争的環境下でのＴＣＳＣによる運用形態

平成17年電気学会電力技術・電力系統技術合同研究会

Presentation date： 2005
送電線事故時の同期発電機内部の空隙磁束のWavelet解析

平成16年電気学会全国大会

Presentation date： 2004
高調波解析用負荷の縮約手法に関する検討

平成16年電気学会全国大会

Presentation date： 2004
高調波解析用負荷モデルのパラメータ推定

平成16年電気学会全国大会

Presentation date： 2004
託送電力の最大受け入れを維持したTCSCによる送電損失の最小化

平成16年電気学会全国大会

Presentation date： 2004
配変負荷融通による地域供給系統の供給支障解消

平成16年電気学会全国大会

Presentation date： 2004
単相負荷のつなぎ換えによる三相電圧不平衡の改善に関する基礎検討

平成16年電気学会全国大会

Presentation date： 2004
統合電力潮流制御装置(ＵＰＦＣ)を用いた動態安定度に関する実験と解析

電気学会電力・エネルギー部門大会

Presentation date： 2004
制動巻線構成変化時の電流分布の解析

電気学会電力・エネルギー部門大会

Presentation date： 2004
同期発電機内部の空隙磁束の変化を用いた送電線事故の判定

電力技術・電力系統技術合同研究会

Presentation date： 2004
UPFCを用いた系統における定態安定度向上効果の検討

電気関係学会北陸支部連合大会

Presentation date： 2004
突極型同期発電機の制御巻線構成変更時の電流分布解析

電気関係学会北陸支部連合大会

Presentation date： 2004
TCSCのディジタル制御に関する研究

電気関係学会北陸支部連合大会

Presentation date： 2004
同時送電可能電力（STC）の最大化を目的としたTCSC設置線路インピーダンスの決定

平成14年電気学会全国大会, 6-117, 205-206

Presentation date： 2002
電気学会地域供給系統モデルにおける事故復旧時の最適系統構成

平成14年電気学会全国大会, 6-117, 207-208

Presentation date： 2002
同期発電機の空隙磁束を用いた送電線事故の把握

平成14年電気学会電力・エネルギー部門大会, 分冊A, 249, 711-712

Presentation date： 2002
風力発電機の電力系統への影響に関する研究

平成14年電気学会電力・エネルギー部門大会, 分冊B, 507, 711-712

Presentation date： 2002
分散型電源のｎ-1解列を考慮した配電損失最小構成の決定手法

平成14年電気学会電力・エネルギー部門大会, 分冊A, 8, 50-55

Presentation date： 2002
統合電力潮流制御装置（UPFC）の基本特性の実験と解析

平成14年度電気関係学会北陸支部連合大会, A-3, 7

Presentation date： 2002
確定論と確率論を融合した地方供給系統構成の多目的評価手法

平成14年電気学会電力・エネルギー部門大会, 分冊A, 124, 463-464

Presentation date： 2002
託送申請量の最大受け入れを目的としたTCSCによる潮流制御

平成14年電気学会電力・エネルギー部門大会, 分冊A, 144, 503-504

Presentation date： 2002
地理的最適化と構成最適化に基づく配電計画評価手法

平成14年電気学会電力・エネルギー部門大会, 分冊A, 149, 513-514

Presentation date： 2002
実測データを用いた高調波解析における負荷モデルに関する検討

平成14年電気学会電力・エネルギー部門大会, 分冊A, 173, 561-562

Presentation date： 2002
地理的最適化と構成最適化に基づいた配電系統計画手法

電気学会電力技術・電力系統技術合同研究会, PE02-54/PSE02-64, 13-18

Presentation date： 2002
託送申請量の最大受け入れを目的としたTCSCによる潮流制御へのPSOの適用

電気学会電力技術・電力系統技術合同研究会, PE02-141/PSE02-151, 39-44

Presentation date： 2002
託送申請量の最大受け入れを目的としたTCSCを用いた潮流制御

平成14年度電気関係学会北陸支部連合大会, A-2, 6

Presentation date： 2002
統合電力潮流制御装置（UPFC）の基本特性の実験と解析

平成14年度電気関係学会北陸支部連合大会, A-3, 7

Presentation date： 2002
PPSの系統参入に対する同時送電可能容量（STC）の計算手法の考察

平成14年度電気関係学会北陸支部連合大会, A-4, 8

Presentation date： 2002
地理的最適化と構成最適化に基づいた配電計画手法

平成14年度電気関係学会北陸支部連合大会, A-5, 9

Presentation date： 2002
配電損失最小構成決定手法における戦略的振動の効果

平成14年度電気関係学会北陸支部連合大会, A-10, 16

Presentation date： 2002
同期発電機の空隙磁束を用いた送電線事故の把握

平成14年度電気関係学会北陸支部連合大会, A-13, 19

Presentation date： 2002
分散型電源の解列を考慮した配電損失最小構成決定手法

平成13年電気学会全国大会, 6-102, 2396-2397

Presentation date： 2001
Simultaneous Transfer Capabilityに基づく電力託送受入れ可能量の計算手法

平成13年電気学会全国大会, 6-124, 2435-2436

Presentation date： 2001
電気学会地域供給系統モデルにおける損失最小系統構成の検討

平成13年電気学会全国大会シンポジウム, 6-S19-5, 2749-2752

Presentation date： 2001
確定論と確率論を融合した地方供給系統の供給信頼度評価に関する基礎的検討

平成13年電気学会電力・エネルギー部門大会, 分冊B, 279, 85-86

Presentation date： 2001
線のボロノイ図を用いた配電エリアの決定

平成13年電気学会電力・エネルギー部門大会, 分冊B, 279, 87-88

Presentation date： 2001
戦略的振動を考慮したタブーサーチによる配電損失最小構成の決定

電気学会電力技術・電力系統技術合同研究会, PE01-20/PSE01-14, 47-52

Presentation date： 2001
PSSの系統参入に対する同時送電可能容量（STC）の算出手法

電気学会電力技術・電力系統技術合同研究会, PE01-170/PSE01-164, 65-70

Presentation date： 2001
配電系統の地理的最適化と構成最適化に関する基礎的検討

平成13年度電気関係学会北陸支部連合大会, A-8, 20

Presentation date： 2001
電気学会地域供給系統モデルにおける事故復旧目標構成の検証

平成13年度電気関係学会北陸支部連合大会, A-9, 21

Presentation date： 2001
STCの最大化を目的としたTCSC設置線路の最適インピーダンスの決定

平成13年度電気関係学会北陸支部連合大会, A-13, 21

Presentation date： 2001
同期発電機の空隙磁束を用いた送電線事故の把握

平成13年度電気関係学会北陸支部連合大会, A-14, 26

Presentation date： 2001
統合電力潮流制御装置(UPFC)の試作とその基本特性の検討

平成13年度電気関係学会北陸支部連合大会, A-15, 27

Presentation date： 2001
誘導発電機を用いた風力発電機の単独運転の検討

平成13年度電気関係学会北陸支部連合大会, A-16, 28

Presentation date： 2001
離散型最適潮流計算による電力供給可能性評価手法

平成12年電気学会全国大会, 6-049, 2580

Presentation date： 2000
最適構成に基づく二次系統の供給信頼度評価手法

平成12年電気学会電力・エネルギー部門大会, 145, 448-449

Presentation date： 2000
ATCに関する基礎的検討

電気学会電力技術・電力系統技術合同研究会, PE00-130/PSE00-135, 37-42

Presentation date： 2000
最適潮流計算を用いたSimultaneous Transfer Capabilityの計算手法

平成12年度電気関係学会北陸支部連合大会, A-8, 21

Presentation date： 2000
サイリスタ制御直列コンデンサ(TCSC)のスイッチング時間分岐に関する検討

平成12年度電気関係学会北陸支部連合大会, A-9, 22

Presentation date： 2000
タブーサーチに基づく配電損失最小構成の決定手法

平成12年度電気関係学会北陸支部連合大会, A-10, 23

Presentation date： 2000
高柔軟・高信頼電気エネルギー流通システムの最適系統構成決定手法

平成11年電気学会全国大会, 6-049, 2580

Presentation date： 1999
多重タブー探索を用いた電力設備計画

平成11年電気学会全国大会, 6-049, 2580

Presentation date： 1999
事故時の供給信頼性を考慮した分散型電源と電力貯蔵装置の最適配置決定手法

平成11年電気学会電力・エネルギー部門大会, 22, 159-164

Presentation date： 1999
ROBDDによる事故時の運用を考慮した地方供給系統構成の決定

平成11年電気学会電力・エネルギー部門大会, 149, 411-412

Presentation date： 1999
供給信頼性の観点から見たFRIENDSの最適系統決定手法

平成11年電気学会電力・エネルギー部門大会, 132, 377-378

Presentation date： 1999
事故時の運用を考慮したBDDによる地方供給系統構成の決定手法

電気学会電力技術・電力系統技術合同研究会, PE99-91/PSE99-88, 37-42

Presentation date： 1999
配電損失最小化を目的とした分散型電源の最適な配置と容量の決定手法

電気学会電力技術・電力系統技術合同研究会, PE99-137/PSE99-134, 19-24

Presentation date： 1999
Network Configuration Study of FRIENDS from a View Point of Service Reliability

Koichi Nara, Yasuhiro Hayashi

International Conference on Electrical Engineering 1998

Presentation date： 1998.08
BDDによる地方供給系統構成の決定手法

平成10年電気学会全国大会, 6, 1366, 161-162

Presentation date： 1998
探索空間の縮小を考慮したタブーサーチによるFRIENDSの最適系統構成の探索

平成11年電気学会電力・エネルギー部門大会, 181, 368-369

Presentation date： 1998
電力損失最小化を目的としたタブー探索による分散型電源の最適配置

平成11年電気学会電力・エネルギー部門大会, 186, 378-379

Presentation date： 1998
多重タブー探索を用いた無効電力設備計画手法-変圧器タップ操作を考慮した場合-

平成11年電気学会電力・エネルギー部門大会, 187, 380-381

Presentation date： 1998
太陽光発電システム向けPCSの地域別容量の検討

伊藤雅一, 林泰弘, 黒川浩助

平成27年度日本太陽エネルギー学会・日本風力エネルギー学会合同研究発表会 (宮崎市)

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Syllabus

Basic Experiments in Science and Engineering 2B Densei

School of Advanced Science and Engineering

2021 spring semester
Laboratory C on Electrical Engineering and Bioscience [S Grade]

School of Advanced Science and Engineering

2021 fall semester
Laboratory C on Electrical Engineering and Bioscience

School of Advanced Science and Engineering

2021 fall semester
Laboratory B on Electrical Engineering and Bioscience [S Grade]

School of Advanced Science and Engineering

2021 spring semester
Laboratory B on Electrical Engineering and Bioscience (B)

School of Advanced Science and Engineering

2021 spring semester
Laboratory B on Electrical Engineering and Bioscience [S Grade]

School of Advanced Science and Engineering

2021 spring semester
Laboratory B on Electrical Engineering and Bioscience (A)

School of Advanced Science and Engineering

2021 spring semester
Frontiers of Electrical Engineering and Bioscience [S Grade]

School of Advanced Science and Engineering

2021 spring semester
Frontiers of Electrical Engineering and Bioscience

School of Advanced Science and Engineering

2021 spring semester
Electrical Energy System and Environment

School of Advanced Science and Engineering

2021 spring semester
Graduation Thesis B [S Grade]

School of Advanced Science and Engineering

2021 fall semester
Graduation Thesis B [Spring] [S Grade]

School of Advanced Science and Engineering

2021 spring semester
Graduation Thesis B [Spring]

School of Advanced Science and Engineering

2021 spring semester
Graduation Thesis B

School of Advanced Science and Engineering

2021 fall semester
Graduation Thesis A

School of Advanced Science and Engineering

2021 spring semester
Graduation Thesis A [S Grade]

School of Advanced Science and Engineering

2021 spring semester
Project Laboratory B [S Grade]

School of Advanced Science and Engineering

2021 fall semester
Project Laboratory B

School of Advanced Science and Engineering

2021 fall semester
Project Laboratory A [S Grade]

School of Advanced Science and Engineering

2021 spring semester
Project Laboratory A

School of Advanced Science and Engineering

2021 spring semester
Advanced Electrical Engineering

School of Advanced Science and Engineering

2021 spring semester
Graduation Thesis B

School of Advanced Science and Engineering

2021 spring semester
Graduation Thesis A

School of Advanced Science and Engineering

2021 fall semester
Energy Next Problem-Solving Practice

Graduate School of Fundamental Science and Engineering

2021 spring semester
Practical Seminar on Technological Excellence II (Energy material)

Graduate School of Fundamental Science and Engineering

2021 an intensive course(spring and fall)
Practical Seminar on Technological Excellence II (Electric power)

Graduate School of Fundamental Science and Engineering

2021 an intensive course(spring and fall)
Power Resource Optimization II

Graduate School of Fundamental Science and Engineering

2021 an intensive course(spring and fall)
Seminar on Business Creation

Graduate School of Fundamental Science and Engineering

2021 an intensive course(spring)
Practical Seminar on Technological Excellence I (Energy material)

Graduate School of Fundamental Science and Engineering

2021 an intensive course(spring and fall)
Practical Seminar on Technological Excellence I (Electric power)

Graduate School of Fundamental Science and Engineering

2021 an intensive course(spring and fall)
Seminar on Power and Energy Materials

Graduate School of Fundamental Science and Engineering

2021 an intensive course(spring and fall)
Social Science for Energy Innovation

Graduate School of Fundamental Science and Engineering

2021 spring semester
Power Resource Optimization I

Graduate School of Fundamental Science and Engineering

2021 an intensive course(spring and fall)
Energy Next Problem-Solving Practice

Graduate School of Creative Science and Engineering

2021 spring semester
Practical Seminar on Technological Excellence II (Energy material)

Graduate School of Creative Science and Engineering

2021 an intensive course(spring and fall)
Practical Seminar on Technological Excellence II (Electric power)

Graduate School of Creative Science and Engineering

2021 an intensive course(spring and fall)
Power Resource Optimization II

Graduate School of Creative Science and Engineering

2021 an intensive course(spring and fall)
Seminar on Business Creation

Graduate School of Creative Science and Engineering

2021 an intensive course(spring)
Practical Seminar on Technological Excellence I (Energy material)

Graduate School of Creative Science and Engineering

2021 an intensive course(spring and fall)
Practical Seminar on Technological Excellence I (Electric power)

Graduate School of Creative Science and Engineering

2021 an intensive course(spring and fall)
Seminar on Power and Energy Materials

Graduate School of Creative Science and Engineering

2021 an intensive course(spring and fall)
Social Science for Energy Innovation

Graduate School of Creative Science and Engineering

2021 spring semester
Power Resource Optimization I

Graduate School of Creative Science and Engineering

2021 an intensive course(spring and fall)
Master's Thesis (Department of Electrical Engineering and Bioscience)

Graduate School of Advanced Science and Engineering

2021 full year
Energy Next Problem-Solving Practice

Graduate School of Advanced Science and Engineering

2021 spring semester
Practical Seminar on Technological Excellence II (Energy material)

Graduate School of Advanced Science and Engineering

2021 an intensive course(spring and fall)
Practical Seminar on Technological Excellence II (Electric power)

Graduate School of Advanced Science and Engineering

2021 an intensive course(spring and fall)
Power Resource Optimization II

Graduate School of Advanced Science and Engineering

2021 an intensive course(spring and fall)
Seminar on Business Creation

Graduate School of Advanced Science and Engineering

2021 an intensive course(spring)
Practical Seminar on Technological Excellence I (Energy material)

Graduate School of Advanced Science and Engineering

2021 an intensive course(spring and fall)
Practical Seminar on Technological Excellence I (Electric power)

Graduate School of Advanced Science and Engineering

2021 an intensive course(spring and fall)
Seminar on Power and Energy Materials

Graduate School of Advanced Science and Engineering

2021 an intensive course(spring and fall)
Social Science for Energy Innovation

Graduate School of Advanced Science and Engineering

2021 spring semester
Power Resource Optimization I

Graduate School of Advanced Science and Engineering

2021 an intensive course(spring and fall)
Research on Next-Generation Electrical Energy Systems

Graduate School of Advanced Science and Engineering

2021 full year
Seminar on Next-Generation Electrical Energy Systems D

Graduate School of Advanced Science and Engineering

2021 fall semester
Seminar on Next-Generation Electrical Energy Systems C

Graduate School of Advanced Science and Engineering

2021 spring semester
Seminar on Next-Generation Electrical Energy Systems B

Graduate School of Advanced Science and Engineering

2021 fall semester
Seminar on Next-Generation Electrical Energy Systems A

Graduate School of Advanced Science and Engineering

2021 spring semester
Advanced Seminar B

Graduate School of Advanced Science and Engineering

2021 fall semester
Advanced Seminar A

Graduate School of Advanced Science and Engineering

2021 spring semester
Advanced Electrical Energy Systems

Graduate School of Advanced Science and Engineering

2021 fall semester
Seminar on Next-Generation Electrical Energy Systems D

Graduate School of Advanced Science and Engineering

2021 fall semester
Seminar on Next-Generation Electrical Energy Systems C

Graduate School of Advanced Science and Engineering

2021 spring semester
Seminar on Next-Generation Electrical Energy Systems B

Graduate School of Advanced Science and Engineering

2021 fall semester
Seminar on Next-Generation Electrical Energy Systems A

Graduate School of Advanced Science and Engineering

2021 spring semester
Advanced Seminar B

Graduate School of Advanced Science and Engineering

2021 fall semester
Advanced Seminar A

Graduate School of Advanced Science and Engineering

2021 spring semester
Research on Next-Generation Electrical Energy Systems

Graduate School of Advanced Science and Engineering

2021 full year
Master's Thesis (Department of Electrical Engineering and Bioscience)

Graduate School of Advanced Science and Engineering

2021 full year
Research on Next-Generation Electrical Energy Systems

Graduate School of Advanced Science and Engineering

2021 full year
Laboratory Rotation B

Graduate School of Advanced Science and Engineering

2021 full year
Laboratory Rotation A

Graduate School of Advanced Science and Engineering

2021 full year
Energy Next Problem-Solving Practice

Graduate School of Advanced Science and Engineering

2021 spring semester
Research on Electrical Engineering and Bioscience A　HAYASHI, Yasuhiro

Graduate School of Advanced Science and Engineering

2021 full year

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Committee Memberships

2016.01

-

Now

経済産業省エネルギー・リソース・アグリゲーション・ビジネス検討会委員
2015

-

Now

電力・ガス取引監視等委員会制度設計専門会合委員
2014.04

-

2018.03

経済産業省エネマネ事業審査委員会委員長
2018.01

-

　

経済産業省分散型エネルギー・マネジメント・システムサブワーキンググループ委員
2012.10

-

2017.04

経済産業省スマートハウス・ビル標準・事業促進検討会デマンドレスポンスタスクフォース座長
2016.12

-

　

経済産業省スマートグリッド戦略専門委員会委員（日本工業標準調査会臨時委員）
2014.12

-

2016.12

経済産業省スマートグリッド戦略専門委員会委員（日本工業標準調査会臨時委員）
2016.10

-

　

総務省自治体主導の地域エネルギーシステム整備研究会構成員
2016.04

-

　

Electricity and Gas Market Surveillance Commission Commissioner
2016.04

-

　

経済産業省電力・ガス取引監視等委員会委員
2011.08

-

2015.08

宮古島市全島エネルギーマネジメントシステム実証事業推進委員会委員長
2010.05

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2015.08

経済産業省スマートメーター制度検討会座長
2013.08

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2014.07

経済産業省総合資源エネルギー調査会基本政策分科会「電力システム改革小委員会制度設計ワーキンググループ」委員（総合資源エネルギー調査会臨時委員）
2013.07

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2014.03

資源エネルギー庁平成２５年度都市ガス計量機器高度化導入効果実証事業評価委員会委員
2014.01

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CIGRE Study Committee C6 (distribution systems and dispersed generation) member
2014.01

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国際大電力会議 C6 技術委員会委員
2012.06

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経済産業省スマートハウス・ビル標準・事業促進検討会座長
2011.07

-

2012.03

文部科学省平成２３年度大学発グリーンイノベーション創出事業審査委員会委員
2011.11

-

2012.02

経済産業省スマートメータータスクフォース座長
2011.11

-

2012.02

経済産業省スマートハウス標準化検討会座長
2011.05

-

2011.11

経済産業省次世代送配電システム制度検討会WG2 委員
2010.11

-

2011.03

経済産業省総合資源エネルギー調査会電気事業分科会「制度環境小委員会」委員（総合資源エネルギー調査会臨時委員）
2010.05

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2011.03

経済産業省次世代送配電システム制度検討会委員
2010.05

-

2011.02

経済産業省次世代送配電システム制度検討会WG1 委員
2009.08

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2010.01

経済産業省「次世代エネルギーシステムに係る国際標準化に関する研究会」委員（WG2主査）

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