Updated on 2024/10/24

写真a

 
KANEKO, Akihisa
 
Affiliation
Research Council (Research Organization), Advanced Collaborative Research Organization for SmartSociety
Job title
Junior Researcher(Assistant Professor)
Degree
Doctor of Engineering ( 2021.03 Waseda University )

Research Experience

  • 2024.04
    -
    Now

    Waseda University   Advanced Collaborative Research Organization for SmartSociety

  • 2023.04
    -
    2024.03

    Waseda University   Faculty of Science and Engineering

  • 2021.04
    -
    2023.03

    Waseda University   Faculty of Science and Engineering   Assistant Professor

Education Background

  • 2018.04
    -
    2021.03

    Waseda University   Graduate School of Advanced Science and Engineering   Electrical Engineering and Bioscience  

  • 2016.04
    -
    2018.03

    Waseda University   Graduate School of Advanced Science and Engineering   Electrical Engineering and Bioscience  

  • 2012.04
    -
    2016.03

    Waseda University   School of Advanced Science and Engineering   Electrical Engineering and Bioscience  

Committee Memberships

  • 2022.06
    -
    Now

    電気学会  給電用語調査専門委員会, 作業会メンバー

  • 2022.04
    -
    Now

    The Institute of Electrical Engineers of Japan  Editorial Committee in department of electric power

Professional Memberships

  • 2018.08
    -
    Now

    米国電気電子学会

  • 2016.01
    -
    Now

    一般社団法人 電気学会

Research Areas

  • Power engineering

Research Interests

  • エネルギーマネジメントシステム

  • 太陽光発電

  • スマートグリッド

  • 送電系統電圧制御

  • 配電系統電圧制御

Awards

  • Young engineer Oral presentation Competition (YOC) 優秀発表賞, 電気学会

    2022.09  

  • Young engineer Oral presentation Competition Encouragement Award

    2020.09   The Institute of Electrical Engineers of Japan  

  • Encouragement Award

    2020.02   The Institute of Electrical Engineers of Japan  

  • Young engineer Poster Competition (YPC) Encouragement Award

    2016.09   The Institute of Electrical Engineers of Japan  

 

Papers

  • A Decentralized Voltage Regulation Scheme Using Improved Volt-Var Function of PV Smart Inverter

    Shanghong Xie, Akihisa Kaneko, Yasuhiro Hayashi

    IEEJ Transactions on Electrical and Electronic Engineering   19 ( 8 ) 1300 - 1310  2024.08

    　View Summary

    With the growing distributed PV installation rate in distribution systems, voltage regulation difficulties such as local voltage violations and fluctuations have become common. To solve the voltage regulation problems, the local voltage regulation method using volt-var (VV) function is effective for its high regulation speed, high accuracy, and flexibility. However, there are still hurdles on real application, such as parameter setting difficulties, insufficient voltage fluctuation mitigation effect, and unfairness of reactive power generation between PV customers. To further improve the VV function, this paper proposes a PID closed-loop based VV function and mode-switching function of PV smart inverter (SI). To validate the proposed methods, numerical simulations were conducted using a 6-feeder distribution system model based on the JST-CREST 126 distribution feeder model. According to the simulation result, the proposed method can better mitigate the local voltage violation compared to basic VV function based on the VV curve, also improve the fairness between PV customers, while the total reactive power generation and tap operations increases for the aim of more adequate voltage regulation. © 2024 The Authors. IEEJ Transactions on Electrical and Electronic Engineering published by Institute of Electrical Engineers of Japan and Wiley Periodicals LLC.

    DOI

    Scopus

    1
    Citation
    (Scopus)

  • Historical reconstruction dataset of hourly expected wind generation based on dynamically downscaled atmospheric reanalysis for assessing spatio-temporal impact of on-shore wind in Japan

    Yu Fujimoto, Masamichi Ohba, Yujiro Tanno, Daisuke Nohara, Yuki Kanno, Akihisa Kaneko, Yasuhiro Hayashi, Yuki Itoda, Wataru Wayama

    Big Earth Data     1 - 23  2024.07

    DOI

    Scopus

  • SVR Control Method Adapted to Three-Phase Unbalanced Voltage in Distribution Systems with Photovoltaics and Electric Vehicles

    Tatsuki Okuno, Akihisa Kaneko, Yasuhiro Hayashi, Masaaki Ishimaru, Minoru Doi

    IEEJ Transactions on Electrical and Electronic Engineering   19 ( 2 ) 222 - 233  2024.02

    　View Summary

    This paper proposes a control method for step voltage regulators (SVRs) to avoid voltage violations in distribution systems with unbalanced voltages due to photovoltaic (PV) generation and electric vehicle (EV) charging. Distribution system operators must effectively address voltage problems resulting from the widespread installation of distributed energy resources under the optimizing the utilization of existing voltage regulators to establish an efficient and rational infrastructure. Therefore, this study focused on advancements in voltage control using SVR based on line-drop compensator (LDC) control, which is widely used in actual operations. We propose a method that utilizes voltage data from information technology switches to detect and address voltage unbalances in the control section, allowing for the sequential adjustment of the monitoring target in LDC control to maintain appropriate voltage limits under unbalanced conditions. We conducted power flow calculations using a distribution system model that represents an actual distribution system in the Hokuriku area. The effectiveness of the proposed method was evaluated in terms of its impact on PV and EV hosting capacity, as well as the frequency of tap operations. © 2023 The Authors. IEEJ Transactions on Electrical and Electronic Engineering published by Institute of Electrical Engineer of Japan and Wiley Periodicals LLC.

    DOI

    Scopus

    1
    Citation
    (Scopus)

  • Challenges in Smartizing Operational Management of Functionally-Smart Inverters for Distributed Energy Resources: A Review on Machine Learning Aspects

    Yu Fujimoto, Akihisa Kaneko, Yutaka Iino, Hideo Ishii, Yasuhiro Hayashi

    Energies   16 ( 3 ) 1330 - 1330  2023.01

    　View Summary

    The widespread introduction of functionally-smart inverters will be an indispensable factor for the large-scale penetration of distributed energy resources (DERs) via the power system. On the other hand, further smartization based on the data-centric operation of smart inverters (S-INVs) is required to cost-effectively achieve the same level of power system operational performance as before under circumstances where the spatio-temporal behavior of power flow is becoming significantly complex due to the penetration of DERs. This review provides an overview of current ambitious efforts toward smartization of operational management of DER inverters, clarifies the expected contribution of machine learning technology to the smart operation of DER inverters, and attempts to identify the issues currently open and areas where research is expected to be promoted in the future.

    DOI

    Scopus

    11
    Citation
    (Scopus)

  • Planning and Management of Distributed Energy Resources for Achieving the Target Renewable Energy Rate in Distribution Systems

    Sota Miyazaki, Akihisa Kaneko, Yasuhiro Hayashi, Shunsuke Kawano, Masayuki Kagita, Keishi Matsuda, Nobuhiko Itaya

    2023 IEEE PES Innovative Smart Grid Technologies - Asia, ISGT Asia 2023    2023

    　View Summary

    Distributed energy resources (DERs) such as photovoltaics (PV) and battery energy storage system (BESS) are effective for improving the target renewable energy (RE) rate in a region. Furthermore, it is expected that distribution system operators (DSOs) will promote their installation in the future. However, it is not enough for DSOs to simply install large-capacity PV and BESS. They need to determine these capacities by taking into account the cost reduction of equipment and the constraints on grid operation. In this paper, we propose a DER installation capacity optimization method based on linear programming using annual data and a layout method from the operator's perspective. This method determines the capacity of DERs based on the target RE utilization rate in a controlled area of a distribution system. Furthermore, we report the results of an analysis of power flow when the DER is introduced. Moreover, we estimate the actual required capacity of DERs for a real 2-feeder distribution system model. In addition, power flow calculations are performed for a typical day where that amount of DERs were installed. The results were evaluated in terms of grid voltage, thermal capacity of line, and distribution losses, and the necessary controls were discussed.

    DOI

    Scopus

  • Grid Congestion Management using Grouping of Renewable Energies based on Sensitivity Analysis and Grid Congestion Amount of Transmission Lines

    Yujiro Tanno, Akihisa Kaneko, Yasuhiro Hayashi, Yuki Itoda, Wataru Wayama, Choei Takahashi

    2023 IEEE PES Innovative Smart Grid Technologies - Asia, ISGT Asia 2023    2023

    　View Summary

    This study proposes an output curtailment method for determining the output curtailment of renewable energy sources (REs) to mitigate grid congestion in transmission systems with a significant influx of REs. To manage congestion, minimizing the total REs output curtailment while avoiding the concentrated output curtailment on a specific RE is crucial. As a means of identifying effective curtailment targets for congestion mitigation, sensitivity analysis is being used for quantifying the congestion mitigation effect with curtailment. Furthermore, equality in output curtailment can be ensured by grouping REs of similar sensitivity and uniformly curtailing each group. Minimizing the curtailment of REs under the grouping-based approach requires forming a group of REs that is sensitive to frequently congested lines, considering the tendency of congestion occurrence in the whole grid. Consequently, this study proposes a method for determining the output curtailment rate of REs using grouping based on weighted sensitivity, considering the sensitivity of each RE and grid congestion. The effectiveness of the proposed method was evaluated by numerical simulation of congestion management over one year on a grid in the northern area of the Tohoku region in Japan. The results indicated that the proposed method was superior in terms of total REs curtailment and equality compared to the comparison method that does not consider the grid congestion amount.

    DOI

    Scopus

  • Effectiveness of Load and Photovoltaic Current Separation Function of Grid Control System in Determining SVR Control Parameters

    Koto Watanabe, Akihisa Kaneko, Yasuhiro Hayashi, Yasunori Iwamoto, Kazuhisa Hikoyama, Hideo Nomura, Tokuhiro Fukuda, Hitoshi Motojima

    Asia-Pacific Power and Energy Engineering Conference, APPEEC    2023

    　View Summary

    Voltage violations in distribution systems (DS) with large photovoltaic (PV) installations must be cleared. To regulate the voltage, Chubu Electric Power Grid has implemented a grid control system (GCS) that aggregates measurement information from switches with sensors, smart meters, step voltage regulators (SVRs), and on-load tap changers (OLTCs) to determine their control parameters. The GCS is characterized by its function to separate measured currents into load and PV currents for the consideration of measured power flow conditions with and without PV generation. Based on the results of numerical simulations using a real grid model, we evaluated the effect of separating functions on increasing the PV hosting capacity in this study.

    DOI

    Scopus

  • Evaluation of Impact on Voltage Regulation by Management of Electric Vehicle Charging in Japanese Actual Distribution Network Model

    Tatsuki Okuno, Akihisa Kaneko, Yasuhiro Hayashi, Ishimaru Masaaki, Minoru Doi

    Asia-Pacific Power and Energy Engineering Conference, APPEEC    2023

    　View Summary

    In this study, we comprehensively evaluated the impacts of popularizing electric vehicles (EVs) and the time shift of EV charging on voltage regulation in distribution systems. Although the popularization of photovoltaics (PVs) and EVs is required to realize a sustainable society, the generation from PVs and the charging demand of EVs may cause voltage violations in distribution systems. To combat these challenges, distribution system operators (DSOs) must upgrade the facilities and management of distribution systems. To verify the strategies for future operations, DSOs evaluate the impact of distributed energy resources (DERs) installation and the effectiveness of the countermeasure candidates on voltage regulations. Therefore, this study assesses the impacts of EV popularization on voltage regulation using an actual distribution system model in the Hokuriku area of Japan. In the numerical simulation, EV and PV popularization levels are set from 0 % to 100 % in 20 % increments. Additionally, the effectiveness of the time shift of EV charging as a countermeasure for voltage regulations is evaluated. To validate the effectiveness, ratios of time-shift EVs are set to 20 % and 50 %. The results reveal the effectiveness and limitation of the time shift of EV charging.

    DOI

    Scopus

  • Day-Ahead Scheduling of Wind-Hydro Balancing Group Operation to Maximize Expected Revenue Considering Wind Power Output Uncertainty

    Yu Fujimoto, Maiko Inagaki, Akihisa Kaneko, Shinichiro Minotsu, Yasuhiro Hayashi

    IEEE Access   11   119200 - 119218  2023

    DOI

  • Assessing the Operational Potential of EV Charger with Reactive Power Control for Improving Power Quality in Distribution System

    Kazuaki Hirano, Akihisa Kaneko, Yasuhiro Hayashi, Tatsuki Okuno, Masaaki Ishimaru

    IEEJ Transactions on Power and Energy   142 ( 12 ) 604 - 615  2022.12  [Refereed]

    DOI

    Scopus

    4
    Citation
    (Scopus)

  • Mitigation of Grid Congestion by Curtailment of Thermal Generators and Renewable Energies Based on Sensitivity Analysis

    Yujiro Tanno, Akihisa Kaneko, Yasuhiro Hayashi, Yuichi Tobita, Kazuhito Sasaki

    IEEJ TRANSACTIONS ON ELECTRICAL AND ELECTRONIC ENGINEERING   17 ( 10 ) 1441 - 1451  2022.10

    　View Summary

    Grid congestion is expected owing to the interconnection of massive renewable energies within the transmission system. Power system operators need to resolve the problem by controlling the output of thermal and renewable generators, such as curtailment, which should be the smallest possible for efficient utilization. Moreover, the equality of generation opportunities should be maintained among renewable energies. However, achieving the two objectives simultaneously is challenging, because the output curtailment effect on grid congestion in a loop system varies depending on its configuration. Further, the thermal generators are curtailed before renewable energies in the merit order scheme necessitating adjustments in the thermal generator output considering the renewable energy curtailment. This study proposed a method to determine the output curtailment ratio of thermal power and renewable energies employing sensitivity analysis, aiming to ensure equality, and maximize the power generation opportunities of renewable energies for the mitigation of grid congestion. The effectiveness of the proposed method was verified via numerical simulations using a power system model based on an actual power system in the northern Tohoku area of Japan. The results indicate that the proposed method can reduce the total amount of curtailment and improve the equality of generation opportunities. (c) 2022 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

    DOI

    Scopus

    3
    Citation
    (Scopus)

  • Scheduling of pumped-storage hydro generator operation in balancing group with wind farms

    Akihisa Kaneko, Maiko Inagaki, Yu Fujimoto, Yasuhiro Hayashi, Shunsuke Nonaka

    IEEJ Transactions on Power and Energy   141 ( 2 ) 79 - 87  2021.02

    　View Summary

    To utilize renewable energy systems (RES) as main generators in power system, power system operators need to maintain reserve power to compensate the uncertain output of RES, such as wind farms (WF). This paper focuses on the balancing group (BG) composed of WF and a pumped-storage hydro generator (PSHG). In the BG operation, power system operators need to schedule the operation of PSHG to minimize the imbalance risk caused by the prediction error of WF output while considering the system specific constraints of PSHG, e.g. the mechanical constraint on pump-up/down switching. This paper proposes a method to schedule the PSHG operation using the interval prediction results of the WF output for alleviating the imbalance risk the proposed scheduling scheme is formulated based on the linear programming. To verify the effectiveness of the proposed method, the amount of imbalance and the net generation of the BG were evaluated based on numerical experiments under two types of situations with different characteristics in WF output. The experimental results reveal the effectiveness of the proposed method.

    DOI

    Scopus

    6
    Citation
    (Scopus)

  • Operation of voltage reactive power control devices based on cooperation between two-voltage class transmission network with pv systems to reduce power loss

    Akihisa Kaneko, Shinya Yoshizawa, Yasuhiro Hayashi, Shuhei Sugimura, Yoshinobu Ueda, Takayuki Tanabe

    IEEJ Transactions on Power and Energy   140 ( 6 ) 484 - 494  2020

    　View Summary

    Transmission system operators (TSO) are responsible to manage the power quality within a proper range and to reduce power loss. Voltage reactive power control (VQC) is mainly utilized to manage the power flow. In the conventional VQC scheme, the static condenser (SC) and shunt reactor (ShR) is generally adjusted based on the target value determined for the heavy load condition in each voltage class. On the other hand, the installation of the massive photovoltaic (PV) systems into transmission systems cause the complex power flow such as the short-term fluctuation of power flow and reverse power flow from the lower transmission system to the upper transmission system. Thus, in the future power system with PV systems, the target values of the VQC devices need to be updated in the short-time period considering the interaction between the upper and lower transmission system to manage the power quality and to the reduce power loss efficiently. This paper proposes the optimization methodology for VQC devices in two-voltage class of transmission system using tabu-search and optimal power flow based on the central VQC methodology. To verify the effectiveness of the proposed methodology, the numerical simulation was performed based on the revised IEEJ EAST 30-machine system model.

    DOI

    Scopus

  • 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 and Telecommunications   9 ( 2 ) 80 - 87  2020

    　View Summary

    This paper proposes a method to determine the Line Drop Compensator (LDC)-control parameters of an On-load Tap Changer (OLTC) and step voltage regulator (SVR) using a database with measured data from offline IT-switches. In a conventional determination method, the parameters are calculated based on the relationship between the sending voltage and the absolute value of current at the secondary side of the OLTC/SVR with a fixed power factor. However, the power factor changes with the interconnection of the photovoltaic (PV) system. Hence, in the proposed method, LDC-control parameters are determined by the relationship between active current, reactive current, and sending voltage. In other words, the parameters are determined from the plane by taking these values as axes. The plane is determined by four measured data extracted from the database which have large voltage fluctuations in response to severe power flow. The effectiveness of the proposed method is verified by numerical simulations using a distribution system model with PV systems. Our results show that the proposed method can improve the amount of voltage violation by 35% compared to a conventional method.

    DOI

    Scopus

    5
    Citation
    (Scopus)

  • 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, Yukiyasu Kuwashita

    IEEE ACCESS   8   220408 - 220421  2020

    　View Summary

    This paper proposes a method to determine an optimal radial-loop configuration to minimize power loss in a distribution network with photovoltaic (PV) systems and evaluates the effectiveness of this configuration. Due to the disaggregation of transmission and distribution in a deregulated power system, stable and efficient operations in terms of voltage regulation and power loss reduction utilizing existing equipment is becoming more important for distribution system operators (DSOs). Japanese DSOs operate distribution networks in a radial configuration while supplying power to customers with high reliability. One method to reduce further power loss is to upgrade the network topology to a radial-loop configuration, which achieves partial loop structures by closing the tie-switches of the radial configuration. To implement a radial-loop configuration, DSOs must first evaluate the reliability, as a loop configuration can cause a feeder circuit breaker (FCB) malfunction and an expansion of the nonsupplied area during fault conditions. However, the impact of a radial-loop configuration on reliability and effectiveness has not been verified. Therefore, this paper proposes a method to determine an optimal radial-loop configuration that minimizes active power loss and maintains high reliability. In a numerical simulation, the reliability of radial-loop configurations is verified, and the effectiveness of the configuration is analyzed in terms of active power loss and voltage regulation under several PV system penetration conditions. A 6.6 kV distribution network consisting of 6 feeders and 11 tie-switches is modeled based on an existing Japanese distribution network and used for numerical simulation.

    DOI

    Scopus

    24
    Citation
    (Scopus)

  • 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

    ELECTRICAL ENGINEERING IN JAPAN   205 ( 1 ) 3 - 16  2018.10

    　View Summary

    Recently, a multiarea system operation utilized a tie-line has been verified to resolve a shortage of a control capacity of frequency control generators output due to a widespread penetration of renewable energy systems (RES). In order to determine the proper dispatch of the generators output to compensate RES fluctuation in the multiarea system operation, the power system operators should consider power flow constrains and indexes of power system conditions such as the speed of dispatch, the balance of reserved control capacity in each area, and the stability of power supply. In this paper, we propose a methodology to determine multiobjective dispatch candidates of frequency control generators output to compensate RES fluctuation in multiarea system operation considering three indexes, a speed of dispatch, a reserved control capacity, and a transient stability based on optimal power flow and multiobjective particle swarm optimization. The methods determine the dispatch based on Euclidean norm of the indexes in the calculated candidates in order to consider all indexes well-balanced. The effectiveness of the proposed methodology is verified by a numerical simulation used IEEJ EAST 30-Machine Grid Model with much RES, and the effectiveness of the dispatch minimized Euclidean norm is confirmed by comparison to single-objective solution in each index among the calculated candidates.

    DOI

    Scopus

    3
    Citation
    (Scopus)

  • Upgrading Voltage Control Method Based on Photovoltaic Penetration Rate

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

    IEEE Transactions on Smart Grid   9 ( 5 ) 3994 - 4003  2018.09

    　View Summary

    In this paper, we propose a comprehensive scheme to determine a suitable method and timing for upgrading the voltage control method. Voltage control methods are expected to be upgraded in accordance with the photovoltaic (PV) penetration in distribution systems. The suitable method and timing detailed in this paper are based on the limit of the PV penetration rate, which is constrained by the regulated voltage deviation. The upgrade process involves moving the on-load tap changer (OLTC) control method from the conventional scalar line drop compensator (LDC) method to the vector LDC method or centralized control method. Then, a static var compensator (SVC) or step voltage regulator (SVR) is installed. The locations of the SVR and SVC are determined to maximize the PV penetration rate. The suitable method and timing are demonstrated using a general distribution system. In addition to the numerical simulations, experiments are performed using an active network system with energy resources. The experimental results are consistent with the numerical simulation results, thus validating the proposed scheme. The maximum PV penetration rate obtained using the OLTC control method is 55%. Whereas, the installation of the SVR and SVC increased the rate to 95% and 100%, respectively.

    DOI

    Scopus

    23
    Citation
    (Scopus)

  • Proposal and evaluation of determination method for multi-objective dispatch of frequency control generators output to compensate renewable energy systems fluctuation in multi area system operation

    Akihisa Kaneko, Yasuhiro Hayashi, Shunsuke Nonaka

    IEEJ Transactions on Power and Energy   138 ( 4 ) 265 - 274  2018

    　View Summary

    Recently, a multi area system operation utilized a tie-line has been verified to resolve a shortage of a control capacity of frequency control generators output due to a widespread penetration of renewable energy systems (RES). In order to determine the proper dispatch of the generators output to compensate RES fluctuation in the multi area system operation, the power system operators should consider power flow constrains and indexes of power system conditions such as the speed of dispatch, the balance of reserved control capacity in each area and the stability of power supply. In this paper, we propose a methodology to determine multi-objective dispatch candidates of frequency control generators output to compensate RES fluctuation in multi area system operation considering three indexes, a speed of dispatch, a reserved control capacity and a transient stability based on OPF and MOPSO. The methods determine the dispatch based on Euclidean norm of the indexes in the calculated candidates in order to consider all indexes well-balanced. The effectiveness of the proposed methodology is verified by a numerical simulation used IEEJ EAST 30-machine system model with much RES, and the effectiveness of the dispatch minimized Euclidean norm is confirmed by comparison to single-objective solution in each index among the calculated candidates.

    DOI

    Scopus

    1
    Citation
    (Scopus)

▼display all

Presentations

  • Construction of Middle and Low Voltage Distribution Network Models as Platforms for Quantitative Evaluation on Performance of Voltage Control Methods

    Akihisa Kaneko, Shinya Yoshizawa, Hideo Ishii, Yasuhiro Hayashi, Ohsei Ikeda, Kazuki Takahashi, Naoki Nishida, Jun Yoshinaga, Takahiro Matsuura, Hiromu Hamada, Kenjiro Mori

    CIGRE 2022 Kyoto Symposium 

    Presentation date： 2022.04

  • LDC Control Parameters Determination by the Planes Using Measured Data from IT Switches in Distribution Systems with PV Systems

    A. Kaneko, Y. Hayashi, M. Ito, T. Anegawa, H. Hokazono, M. Oyama

    2019 6th International Conference on Power and Energy Systems Engineering (CPESE 2019) 

    Presentation date： 2020.09

  • 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

  • Multi-Objective Dispatch of Frequency Control Generators in Wide Area Operation to Compensate Fluctuation of Renewable Generators Output

    Akihisa Kaneko, Daichi Azami, Yasuhiro Hayashi, Shunsuke Nonaka

    24th International Conference on Electrical Engineering (ICEE 2018) 

    Presentation date： 2018.06

  • Determination Method of Optimal Dead Band Width under Centralized Voltage Control Using IT Switches Data in Three Sectionalized Three Connected Distribution Networks

    Akihisa KANEKO, Ryo TAKAHASHI, Satoru AKAGI, Jun YOSHINAGA, Masakazu ITO, Yasuhiro HAYASHI

    the International Conference on Electrical Engineering 2016 (ICEE2016) 

    Presentation date： 2016.07

Research Projects

  • Systematization of cooperative next-generation distribution system operation method for mass introduction of photovoltaic power generation

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research

    Project Year :

    2023.04
    -
    2027.03
     

Misc

  • A Spatial Impact Assessment Approach for Procuring Local Flexibility Based on Distributed Energy Resources

    Shitara Ryuji, Kaneko Akihisa, Fujimoto Yu, Iino Yutaka, Hayashi Yasuhiro

    The International Council on Electrical Engineering (ICEE) Conference 2024    2024.07

  • Consideration of Multi Evaluation Method of Power System Resilience from Adequacy Aspects

    Takehara Arisa, Yuyama Ayumi, Kaneko Akihisa, Hayashi Yasuhiro

    The International Council on Electrical Engineering (ICEE) Conference 2024    2024.07

  • Cooperative Voltage Regulation Method between LRT and Smart Inverter Considering Reactive Power Output

    高橋壮, 金子曜久, 藤本悠, 林泰弘

    電気学会全国大会講演論文集(CD-ROM)   2024  2024

    J-GLOBAL

  • Data Squashing and Clustering Energy Prosumers for Cooperated Operation of Photovoltaic Smart Inverters

    金子奈々恵, 藤本悠, 高橋壮, 金子曜久, 林泰弘

    電気学会全国大会講演論文集(CD-ROM)   2024  2024

    J-GLOBAL

  • Study on An Optimization Method of Dynamic System Configuration for Distribution Systems with High DER Penetration

    XIE Shanghong, 金子曜久, 飯野穣, 林泰弘, 百川涼平, 矢部啓之, 直井伸也

    電気学会全国大会講演論文集(CD-ROM)   2024  2024

    J-GLOBAL

  • Optimization of Power Factor of PVs for Effective Utilization of PV Generation in Distribution Network

    渡邉崇史, 金子曜久, 石井英雄, 林泰弘, 杉山開路, 平田嘉裕

    電気学会全国大会講演論文集(CD-ROM)   2024  2024

    J-GLOBAL

  • Evaluation of Impact on Frequency Stability by Control Type and Installation Location of Grid-Supporting Inverters under a Generator Trip

    吉川優衣, 志熊亮佑, 金子曜久, 諏訪寛, 石井英雄, 林泰弘

    電気学会全国大会講演論文集(CD-ROM)   2024  2024

    J-GLOBAL

  • Consideration of Multifaceted Evaluation of System Resilience from the Adequacy Perspective

    竹原有紗, 竹原有紗, 湯山安由美, 金子曜久, 林泰弘

    電気学会全国大会講演論文集(CD-ROM)   2024  2024

    J-GLOBAL

  • Basic Study on Quantification of Frequency Response Reserve in Inertia Time Domain

    志熊亮佑, 金子曜久, 林泰弘, 織原大, 喜久里浩之, 田岡久雄

    電気学会全国大会講演論文集(CD-ROM)   2024  2024

    J-GLOBAL

  • Bidding Plans of Renewable Energy Sources for Multiple Markets Considering the Uncertainty

    桂田一輝, 藤本悠, 金子曜久, 林泰弘, 簑津真一郎, 柴田龍一, 二田丈之

    電気学会全国大会講演論文集(CD-ROM)   2024  2024

    J-GLOBAL

  • Initial Study on Placement of Battery Energy Storage System to Mitigate Grid Congestion in Future Distribution Network

    蔵口桜子, 金子曜久, 石井綱吉, 林泰弘, 小林将矢, 長谷川匡彦, 唐澤利史, 吉永淳

    電気学会全国大会講演論文集(CD-ROM)   2024  2024

    J-GLOBAL

  • Evaluation on the Impact of Distributed Energy Resources to Voltage Unbalance Using an Actual Distribution Network Model

    奥野竜希, 金子曜久, 林泰弘, 石丸雅章, 土肥実

    電気学会全国大会講演論文集(CD-ROM)   2024  2024

    J-GLOBAL

  • Trends in Mitigation of Grid Congestion using Distributed Energy Resources in Power System

    Kaneko Akihisa, Fujimoto Yu, Iino Yutaka

    IEEJ Transactions on Power and Energy   143 ( 9 ) 520 - 523  2023.09

    　View Summary

    Recently, a utilization scheme of distributed energy resources (DERs) is discussed as a countermeasure for mitigation of congestion in distribution networks. This paper describes the technological trends in Japan and overseas based on pilot projects. Additionally, the topics about DERs utilization verified in research papers are surveyed and summarized.

    DOI

  • A cooperative voltage regulation scheme using OLTC and Volt-Var function of PV Smart Inverter

    Xie Shanghong, Kaneko Akihisa, Hayashi Yasuhiro

    The International Council on Electrical Engineering (ICEE) Conference 2023    2023.07

  • Evaluation of PV/EV hosting capacity by optimal radial-loop configuration for distribution network in various scenarios

    Sakurako Kuraguchi, Akihisa Kaneko, Yasuhiro Hayashi, Daisuke Muramoto, Iida Yoshikazu, Daisuke Yamaguchi

    The International Council on Electrical Engineering (ICEE) Conference 2023    2023.07

  • 海外駐在記事：テネシー大学滞在記

    金子 曜久

    電気学会論文誌Ｂ（電力・エネルギー部門誌）   143 ( 5 ) NL5_9 - NL5_9  2023.05

    DOI

  • Impact Assessment of Voltage and Power Flow in Distribution System based on DER Procurement Locations for Alleviation of Congestion at Distribution Substation

    設楽竜士, 金子曜久, 藤本悠, 飯野穣, 林泰弘

    電気学会研究会資料(Web)   ( PE-23-119-192/PSE-23-111-184 )  2023

    J-GLOBAL

  • A Study on Optimizing Configurations of Distribution Networks for Service Restoration

    杉村修平, 金子曜久, 林泰弘, 野崎哲平, 鈴木顕, 伊藤健洋, 田邊隆之

    電気学会研究会資料(Web)   ( PE-23-143-226/PSE-23-135-218 )  2023

    J-GLOBAL

  • Potential Estimation of Local Photovoltaic Surplus Power Use by Electric Vehicles on Probe Data

    大崎文暉, 藤本悠, 金子曜久, 光岡正隆, 林泰弘, 宮崎泰仁, 鈴江祥典, 村井謙介, 武田大

    電気学会電力・エネルギー部門大会論文集(Web)   2023  2023

    J-GLOBAL

  • Basic Evaluation of Characteristics of Energy Demand from Heat Pump Water Heaters Using Estimated Heat Demand Data for Effective Utilization of Photovoltaic Surplus

    蔵口桜子, 金子曜久, 林泰弘

    電気学会電力・エネルギー部門大会論文集(Web)   2023  2023

    J-GLOBAL

  • Impact Analysis of DER Procurement Timing for Alleviating Congestion at Distribution Substation due to PV Reverse Power Flow

    設樂竜士, 藤本悠, 金子曜久, 飯野穣, 林泰弘

    電気学会電力・エネルギー部門大会論文集(Web)   2023  2023

    J-GLOBAL

  • Evaluation of Impact on Voltage Regulation by LRT and SVR under Photovoltaics and Electric Vehicles Penetration Scenario in Actual Distribution Network Model

    奥野竜希, 金子曜久, 林泰弘, 石丸雅章, 土肥実

    電気学会電力・エネルギー部門大会論文集(Web)   2023  2023

    J-GLOBAL

  • Evaluation of the Installation Placement of Grid-Supporting Inverters on Frequency Variation

    志熊亮佑, 吉川優衣, 諏訪寛, 金子曜久, 石井英雄, 林泰弘

    電気学会電力・エネルギー部門大会論文集(Web)   2023  2023

    J-GLOBAL

  • Simplified Estimating PV Output method Using Switches with Sensor of PV’s Service Wire

    渡部鴻人, 金子曜久, 林泰弘, 岩本泰典, 彦山和久, 野村英生, 福田徳浩, 元島仁志

    電気学会電力・エネルギー部門大会論文集(Web)   2023  2023

    J-GLOBAL

  • Quantitative Effect of the Inertia Emulation Block of Grid-Forming Inverters on Frequency Stability

    Ryosuke Shikuma, Dai Orihara, Hiroshi Kikusato, Hisao Taoka, Akihisa Kaneko, Yasuhiro Hayashi

    2023 IEEE Belgrade PowerTech, PowerTech 2023    2023

    　View Summary

    The short-term frequency stability of power systems has decreased with the replacement of synchronous generators (SGs) with inverter-based resources. Grid-forming inverters (GFMIs), developed to maintain power system stability, are also effective for frequency stability. Virtual synchronous generators (VSGs) and droop controls (Droops) are major algorithms of GFMIs. VSGs are considered to outperform Droops in terms of frequency stability because of the existence of the inertia emulation block in the active power controller. However, few studies have identified the quantitative effect of the inertia emulation block of GFMIs on frequency stability. This study analyzes the effect by deriving the relationship between the inertial response and the frequency based on the swing equation of SGs. The method of the analysis is verified by the simulation by the PSCAD/EMTDC. As indicated in this study, after a disturbance, the inertia emulation block immediately increases the load share of the VSG and decreases that of the SG, resulting in improved frequency stability. Moreover, it is implied that the Droop, i.e., the GFMI without inertia emulation block, can improve frequency stability as the VSG by increasing the droop gain, although the Droop requires larger energy provision from the direct-current side than the VSG. This study clarifies the better performance of the VSG in frequency stability by quantifying short-term load sharing among GFMIs and SGs that are significantly related to the short-term frequency stability.

    DOI

  • Facility Planning and Operation in Zero Emission Grid with Photovoltaic and Battery Systems

    Sota Miyazaki, Akihisa Kaneko, Yasuhiro Hayashi, Shunsuke Kawano, Keishi Matsuda, Masayuki Kagita, Nobuhiko Itaya

    2023 IEEE Belgrade PowerTech, PowerTech 2023    2023

    　View Summary

    This paper proposes a distribution network operation scheme referred to as the zero emission grid (ZEG) in which all demand is met by renewable energy to reduce the environmental burden. In addition, we propose and evaluate a method for planning and controlling distributed energy resources (DERs) under this scheme. To meet the entire demand with renewable energy, it is necessary to install photovoltaic (PV) and battery energy storage system (BESS), and to control them appropriately to satisfy the grid operation constraints such as voltage and thermal line capacity. Therefore, we propose a PV capacity determination method to achieve ZEG and a BESS charging/discharging method to satisfy the grid constraints under the PV installation of the calculated capacity. Furthermore, we performed numerical simulation using a two-distribution-line model with the calculated capacity of PV to evaluate the effectiveness of the proposed DER management method. The results demonstrated that the proposed method could satisfy the power flow constraints and utilize the BESS efficiently.

    DOI

  • 用語解説（第142回テーマ：スマートインバータ）／電力・エネルギー部門誌 2023年1月号目次

    金子 曜久

    電気学会論文誌Ｂ（電力・エネルギー部門誌）   143 ( 1 ) NL1_6 - NL1_6  2023.01

    DOI

  • Control Methodology of Battery Energy Storage Systems to Improve Resilience in Zero Emission Grid Operations

    宮崎創太, 金子曜久, 林泰弘, 河野俊介, 松田啓史, 鍵田昌幸, 板屋伸彦

    電気学会研究会資料(Web)   ( PE-23-049-069/PSE-23-055-075/SPC-23-105-125 )  2023

    J-GLOBAL

  • Basic Study for Upgrading SVR Control Parameters Determination Method Using Measured Data of Neighborhood PVs

    渡部鴻人, 金子曜久, 林泰弘, 岩本泰典, 彦山和久, 野村英生, 福田徳浩

    電気学会全国大会講演論文集(CD-ROM)   2023  2023

    J-GLOBAL

  • Learning Data Proximity Matrix to Predict DER Requirement for Avoiding Distribution Substation Congestion

    設樂竜士, 藤本悠, 金子曜久, 飯野穣, 林泰弘

    電気学会全国大会講演論文集(CD-ROM)   2023  2023

    J-GLOBAL

  • Impact on Output Control for Grid Congestion Mitigation by Grouping level of Renewable Energies based on Sensitivity Analysis

    丹野祐次郎, 金子曜久, 林泰弘, 糸田祐樹, 和山亘, 高橋長衛

    電気学会全国大会講演論文集(CD-ROM)   2023  2023

    J-GLOBAL

  • Assessing of PV and EV Hosting Capacity Improvement by Optimal Radial-Loop Configuration

    蔵口桜子, 金子曜久, 林泰弘, 村本大輔, 飯田義和, 山口大翼

    電気学会全国大会講演論文集(CD-ROM)   2023  2023

    J-GLOBAL

  • Basic Study on Volt-Var Control Parameter Determination of Smart Inverters for Coordination with LRT

    馬喬, 金子曜久, 林泰弘

    電気学会全国大会講演論文集(CD-ROM)   2023  2023

    J-GLOBAL

  • Basic Analysis of Dynamics in PV-Originated Congestion at Distribution Substation for Realizing Local Flexibility with Distributed Energy Resources

    Ryuji Shitara, Akihisa Kaneko, Yu Fujimoto, Yutaka Iino, Yasuhiro Hayashi

    International Photovoltaic Science and Engineering Conference (PVSEC-33)    2022.11

  • Voltage control performance of OLTC and SVR in Hokuriku area distribution network with PV and EV penetration in Japan

    Tatsuki Okuno, Akihisa Kaneko, Yasuhiro Hayashi, Masaaki Ishimaru, Minoru Doi

    International Photovoltaic Science and Engineering Conference (PVSEC-33)    2022.11

  • Basic study of an optimized closed-loop volt-var control strategy of PV Smart Inverters for voltage regulation

    Shanghong Xie, Akihisa Kaneko, Yu Fujimoto, Yasuhiro Hayashi

    International Photovoltaic Science and Engineering Conference (PVSEC-33)    2022.11

  • Evaluation of frequency response in bulk power system with grid-forming inverters under generator trip

    Akihisa Kaneko, Ryosuke Shikuma, Hiroshi Suwa, Hideo Ishii, Yasuhiro Hayashi, Tatsuhito Nakajima

    International Photovoltaic Science and Engineering Conference (PVSEC-33)    2022.11

  • EVALUATION METHOD OF CONGESTION FREQUENCY CONSIDERING CHANGES IN POWER FLOW CONDITIONS DUE TO WIND TURBINE INSTALLATION

    Yujiro Tanno, Akihisa Kaneko, Yasuhiro Hayashi, Naoki Ito, Katsuhiro Kakeda, Masamichi Ohba, Daisuke Nohara, Yuki Kanno

    IET Conference Proceedings   2022 ( 23 ) 656 - 661  2022

    　View Summary

    With the recent introduction of renewable energy sources, the shortage of the transmission line capacity (i.e., grid congestion) in Japan is a major concern. To maximize the output of wind turbines (WTs), the installation area is determined by considering the grid congestion frequency and wind conditions when installing new WTs. However, determining the appropriate area may be challenging for some power producers in terms of the limitation of accessible information and construction of an evaluation platform as detailed information on the power system and power flow calculations is required. Therefore, this study assumes that the system operator shares the information of acceptable additional generation in each area without grid congestion based on past actual power flow data. Furthermore, using this information, a simple evaluation method is proposed for power generators to evaluate the frequency of grid congestion after the introduction of new WTs. To verify the usefulness of the proposed method, numerical experiments are conducted for several scenarios introducing WTs in a simplified power system model of the northern area of the Tohoku region. The results indicate that the proposed method can accurately estimate the frequency of grid congestion in the evaluation scenarios.

    DOI

  • BALANCING GROUP OPERATION FOR WIND POWER PLANTS AND A PUMPED-STORAGE HYDRO GENERATOR TO MAXIMIZE EXPECTED REVENUE IN CONSIDERATION OF WIND POWER OUTPUT UNCERTAINTY

    Maiko Inagaki, Akihisa Kaneko, Yu Fujimoto, Yasuhiro Hayashi, Shinichiro Minotsu

    IET Conference Proceedings   2022 ( 23 ) 650 - 655  2022

    　View Summary

    The amount of power generated by wind farms (WFs) varies depending on the wind conditions, and its use as the main power source within a power system is thus uncertain. This study proposes a balancing group (BG) scheme that combines the power from WFs with an existing variable-speed pumped-storage hydro generator (PSHG), which possesses a large capacity that can compensate for the variability in WF output. To maximize revenue, power suppliers need to schedule and operate the BG by considering the uncertainty in WF output and the PSHG's operational constraints. In the proposed method, probability density predictions (PDPs) are used to estimate WF uncertainty, and the BG output is scheduled to maximize the expected revenue. The PSHG water-level transition is managed within an operational limit using WF output scenarios derived from PDP results and historical WF output trends. The effectiveness of the proposed scheme was assessed based on revenue for three weeks with characteristic wind conditions, and the results of numerical simulations conducted using several operational schemes were compared using real-world WF output data. The results indicate that higher revenues can be achieved using the proposed operational scheme, thus validating the usefulness of the proposed method.

    DOI

  • Development of the Distribution Network Simulation Model in Hokuriku Area and Evaluation of the Impact on Distribution Network Voltage due to Massive PV Penetration

    奥野竜希, 金子曜久, 林泰弘, 石丸雅章, 土肥実

    電気学会電力・エネルギー部門大会論文集(Web)   2022  2022

    J-GLOBAL

  • Assessing the Power Loss Reduction in Distribution Network with EV by Radial-Loop Operation

    蔵口桜子, 金子曜久, 林泰弘, 村本大輔, 飯田義和, 桑下敬康

    電気学会電力・エネルギー部門大会論文集(Web)   2022  2022

    J-GLOBAL

  • Evaluation of Practical Inertia of Grid-Forming Inverter in Frequency Variation under Load Trip

    志熊亮佑, 織原大, 喜久里浩之, 田岡久雄, 金子曜久, 林泰弘

    電気学会電力・エネルギー部門大会論文集(Web)   2022  2022

    J-GLOBAL

  • Balancing Group Operation of Wind Farms and a Pumped-Storage Hydro Generator for Maximizing Expected Revenue: Simulation Evaluation of Operation for Consecutive Days

    稲垣舞子, 金子曜久, 藤本悠, 林泰弘, 簑津真一郎

    電気学会電力・エネルギー部門大会論文集(Web)   2022  2022

    J-GLOBAL

  • Evaluation Method for Grid Congestion Frequency in Newly Installation of Wind Turbines

    丹野祐次郎, 金子曜久, 林泰弘, 伊藤直樹, 掛田勝宏

    電気学会電力・エネルギー部門大会論文集(Web)   2022  2022

    J-GLOBAL

  • Study of PV Real-time Curtailment Method for Preventing Line Capacity Excess in ZEG

    宮崎創太, 金子曜久, 林泰弘, 河野俊介, 松田啓史, 板屋伸彦

    電気学会電力・エネルギー部門大会論文集(Web)   2022  2022

    J-GLOBAL

  • Experimental Evaluation of Voltage Control Using Battery Energy Storage Systems in Analog Simulator

    金子曜久, 芳澤信哉, 石井英雄, 林泰弘, 松浦隆祥, 濱田拓, 宮崎輝

    電気学会電力・エネルギー部門大会論文集(Web)   2022  2022

    J-GLOBAL

  • Effectiveness of Load/PV Current Separation Function of Grid Control System in Determining SVR Control Parameters for Maximizing PV Hosting Capacity

    渡部鴻人, 金子曜久, 林泰弘, 岩本泰典, 彦山和久, 野村英生, 福田徳浩

    電気学会電力・エネルギー部門大会論文集(Web)   2022  2022

    J-GLOBAL

  • Impact of Smart Meter Measurement Granularity on Control Parameters of OLTC in Distribution Networks with PV

    Marika Nakamura, Akihisa Kaneko, Shinya Yoshizawa, Hideo Ishii, Yasuhiro Hayashi

    2022 IEEE Power and Energy Society Innovative Smart Grid Technologies Conference, ISGT 2022    2022

    　View Summary

    In distribution networks, grid operators need to prevent voltage violations when photovoltaic generation increases. As a countermeasure, they apply sophisticated updating of the control parameters of on-load tap changers (OLTCs). Furthermore, to upgrade the grid operation, the measurement granularity of smart meters has been altered from 30-minute increments to shorter times. However, in terms of data communication load reduction, only a few smart meters need changes. In this study, we evaluate the effect of smart meter data with short measurement granularity on the voltage control performance of an OLTC. As a method of programming consumers to acquire data every 5 min, we selected the consumers measuring the high or low voltage among the past measured database. The numerical simulations showed that voltage violations occurred with control parameters using 30minute measurement data. However, this could completely be avoided by using 5-minute data.

    DOI

  • Determination Method of Curtailment Rate of Thermal Power Generators for Grid Congestion Mitigation based on Congestion Situation of All Transmission Lines and Sensitivity Analysis

    丹野祐次郎, 金子曜久, 林泰弘, 坂本将造, 佐々木和人

    電気学会全国大会講演論文集(CD-ROM)   2022  2022

    J-GLOBAL

  • Effectiveness of Determination Method for Volt-VAR Control Parameters Based on Voltage-Sensitivity

    田中裕大, 金子曜久, 石井英雄, 林泰弘, 松浦隆祥, 濱田拓, 宮崎輝

    電気学会全国大会講演論文集(CD-ROM)   2022  2022

    J-GLOBAL

  • Basic Study of PV Output Control Aiming at Zero Emission Grid in Distribution Network

    宮崎創太, 金子曜久, 林泰弘, 河野俊介, 松田啓史, 板屋伸彦

    電気学会全国大会講演論文集(CD-ROM)   2022  2022

    J-GLOBAL

  • Basic Technology Development of Countermeasure Inverter with Inertia Function (4) Advanced Development of Control Algorithm and Evaluation Platform for Grid Forming Inverter

    石井英雄, 金子曜久, 林泰弘, 原亮一, 中島達人, 餘利野直人, 造賀芳文

    電気学会全国大会講演論文集(CD-ROM)   2022  2022

    J-GLOBAL

  • Balancing Group Operation Schedule for Wind Farms and a Pumped-Storage Hydro Generator for Maximizing Expected Revenue

    稲垣舞子, 金子曜久, 藤本悠, 林泰弘, 簑津真一郎

    電気学会全国大会講演論文集(CD-ROM)   2022  2022

    J-GLOBAL

  • Basic Study of SVR Control Parameters Determination Using Grid Control System

    渡部鴻人, 金子曜久, 林泰弘, 岩本泰典, 彦山和久, 野村英生, 福田徳浩

    電気学会全国大会講演論文集(CD-ROM)   2022  2022

    J-GLOBAL

  • Volt-Power Factor Control for EVs Charger to Improve Voltage Unbalance Ratio in Distribution Network

    平野和明, 金子曜久, 林泰弘, 石丸雅章, 奥野竜希

    電気学会研究会資料(Web)   ( PE-22-065-083/PSE-22-085-103/SPC-22-113-131 )  2022

    J-GLOBAL

  • A Planning Method for Allocation of New Renewable Energies Based on the Uneven Distribution of Generation Potential and Frequency of Grid Congestion

    丹野祐次郎, 金子曜久, 林泰弘, 坂本将造, 佐々木和人

    電気学会研究会資料(Web)   ( PE-22-065-083/PSE-22-085-103/SPC-22-113-131 )  2022

    J-GLOBAL

  • Assessing the Operational Potential of Pumped-Storage Hydro Generators for Supporting the Grid Integration of Wind Farms

    Maiko Inagaki, Akihisa Kaneko, Yu Fujimoto, Yasuhiro Hayashi, Shinichiro Minotsu

    2021 IEEE PES INNOVATIVE SMART GRID TECHNOLOGIES - ASIA (ISGT ASIA)    2021

    　View Summary

    This study evaluates the operational potential of pumped-storage hydro generators (PSHGs) as a regulating power source for the stable use of wind power generation. In recent years, the concept of a balancing group (BG), consisting of multiple generators, has been considered to alleviate the imbalance, defined as a discrepancy between planned and actual power supply values. Combining unstable power sources, such as wind power with controllable sources such as PSHG, is expected to reduce the imbalance in BG. For the effective utilization of PSHG, power system operators need to determine a schedule of operation considering the uncertainty in the wind farm (WF) output on the preceding day. In this study, the operation scheduling of PSHG, based on the interval prediction results of wind power generation, is discussed and the potential contribution of PSHG operation is assessed from the perspective of the imbalance reduction within this framework. The operational potential is evaluated from the viewpoint of the types of PSHG, that is, fixed-speed and variable-speed PSHGs, by the annual operational simulation using real-world WF output data. The results show that the appropriate operational scheduling of a single variable-speed PSHG can contribute to a reduction in imbalance comparable to the reduction achieved by two fixed-speed PSHGs.

    DOI

  • Basic Study on Evaluation of the Effectiveness of Grid-Forming Inverter Installation on Grid Frequency Stability

    志熊亮佑, 金子曜久, 芳澤信哉, 石井英雄, 林泰弘, NGUYEN Hieu Xuan, 中島達人

    電気学会全国大会講演論文集(CD-ROM)   2021  2021

    J-GLOBAL

  • Operation of Variable Speed Pumped-Storage Hydro Generator in Balancing Group with Wind Farms-Output Control for 30 Minutes Power Balancing-

    稲垣舞子, 金子曜久, 藤本悠, 林泰弘, 簑津真一郎

    電気学会全国大会講演論文集(CD-ROM)   2021  2021

    J-GLOBAL

  • Evaluation of Frequency Stability in Transmission Network with Grid-Forming Inverters during Generator Trip

    志熊亮佑, 金子曜久, 芳澤信哉, 石井英雄, 林泰弘, NGUYEN Hieu Xuan, 中島達人

    電気学会電力・エネルギー部門大会論文集(Web)   2021  2021

    J-GLOBAL

  • The Impact on Determination of LRT Control Parameter due to Different Time Step of Voltage Measurement in Distribution System

    中村麻理香, 芳澤信哉, 金子曜久, 石井英雄, 林泰弘

    電気学会電力・エネルギー部門大会論文集(Web)   2021  2021

    J-GLOBAL

  • Balancing Group Operation of Wind Farms and Fixed Speed Pumped-Storage Hydro Generators for Reducing Negative Imbalance

    稲垣舞子, 金子曜久, 藤本悠, 林泰弘, 簑津真一郎

    電気学会電力・エネルギー部門大会論文集(Web)   2021  2021

    J-GLOBAL

  • Determination Method of Curtailment Rate of Thermal Generators and Renewable Energies using Sensitivity Analysis in Power System based on Merit-Order

    丹野祐次郎, 金子曜久, 林泰弘, 飛田雄一, 佐々木和人

    電気学会電力・エネルギー部門大会論文集(Web)   2021  2021

    J-GLOBAL

  • Stability Evaluation of a Multi-objective Dispatch of Frequency Control Generators in Cross-Regional Operation under Various Conditions

    Daichi Azami, Akihisa Kaneko, Yasuhiro Hayashi, Shunsuke Nonaka

    2020 IEEE POWER & ENERGY SOCIETY INNOVATIVE SMART GRID TECHNOLOGIES CONFERENCE (ISGT)    2020

    　View Summary

    Large-scale and regionally intensive introductions of renewable energy sources (RES) requires greater control capacity from frequency control generators (FCGs). To solve this problem, cross-regional operation, which integrates multiple control areas, is widely studied. However, this involves more complicated power flow, due to the wider control area. Thus, a transmission system operator should adjust output of FCGs to compensate for RES fluctuations, considering system indices and power system constraints in various power flow conditions such as day or night. We have proposed a multi-objective optimizing method for FCG dispatches to compensate for RES fluctuations in one case in the daytime. A simulation was needed, under various load and RES output conditions, to evaluate the validity of the method. In this study, a simulation is conducted, using a power system model base on the power system of East Japan under seven power flow conditions. The results support the validity of the proposed method for determining a dispatch, considering multiple system indices in all cases.

  • Scheduling of Pumped-Storage Hydro Generator Operation in Balancing Group with Wind Farms

    金子曜久, 稲垣舞子, 藤本悠, 林泰弘, 野中俊介

    電気学会電力・エネルギー部門大会論文集(Web)   2020  2020

    J-GLOBAL

  • Evaluation of Dynamic Var Support from PV Systems in Distribution Systems during Transmission Systems Fault

    水上瑛太, 金子曜久, 芳澤信哉, 石井英雄, 林泰弘

    電気学会全国大会講演論文集(CD-ROM)   2020  2020

    J-GLOBAL

  • Evaluation of Power Loss and Supply Reliability for the Optimal Loop-Radial Configuration

    金子曜久, 林泰弘, 姉川高也, 外薗秀康, 桑下敬康

    電気学会全国大会講演論文集(CD-ROM)   2020  2020

    J-GLOBAL

  • 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

    7th International Youth Conference on Energy, IYCE 2019    2019.07

    　View Summary

    Voltage ride-through (VRT) and dynamic voltage support (DVS) are advanced functions of photovoltaic (PV) systems that are expected to improve future power system stability. Toward the improvement in system stability, it is valuable for power system operators (PSOs) to evaluate the effects of these functions. However, it is not straightforward to evaluate the amount of volt-ampere reactive (var) injection from PV systems because var injection depends on weather conditions and on the terminal voltages of the PV systems during voltage sag. In addition, it is equally important to analyze var support from distribution systems (DSs) to accurately determine the amount of var injection in a power system since numerous PV systems are connected to DSs. In this study, we evaluate the var support at a substation of a DS with PV during a voltage sag under various weather conditions. The var injection was analyzed for several time zones and seasons to consider a change in solar radiation. A numerical simulation was conducted based on IEEE 13 Node Test Feeder Model with PV systems. The results indicated that there is a large variation in var support depending on seasons or time zones with different solar irradiance.

    DOI

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

    金子曜久, 芳澤信哉, 林泰弘, 杉村修平, 植田喜延, 田邊隆之

    電気学会研究会資料   ( PSE-19-001-006.008-011 )  2019

    J-GLOBAL

  • 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

    電気学会全国大会講演論文集(CD-ROM)   2019  2019

    J-GLOBAL

  • 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

    電気学会全国大会講演論文集(CD-ROM)   2019  2019

    J-GLOBAL

  • 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, 金子曜久, 竹延祐二, 赤木覚, 芳澤信哉, 石井英雄, 林泰弘

    電気学会全国大会講演論文集(CD-ROM)   2019  2019

    J-GLOBAL

  • 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

    電気学会電力・エネルギー部門大会論文集(CD-ROM)   2019  2019

    J-GLOBAL

  • 再生可能エネルギー電源が大量導入された広域系統における周波数調整用発電機の増強計画決定手法

    浅見拓一知, 金子曜久, 林泰弘, 野中俊介

    電気学会電力・エネルギー部門大会論文集(CD-ROM)   2019  2019

    J-GLOBAL

  • 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

    電気学会電力・エネルギー部門大会論文集(CD-ROM)   2019  2019

    J-GLOBAL

  • Optimal Responses of Home Energy Management Systems to Volt-watt Functions and Forecast Errors

    V. T. Dao, H. Ishii, Y. Hayashi, Y. Takasawa, K. Murakami, Y. Takenobu, H. Kikusato, A. Kaneko, S. Yoshizawa

    Proceedings - 2018 IEEE PES Innovative Smart Grid Technologies Conference Europe, ISGT-Europe 2018    2018.12

    　View Summary

    The popularity of rooftop solar and home-scale batteries brings a fantastic opportunity to homeowners for using energy more flexibly and achieving benefits from trading electricity. This paper narrates a research work of how home energy management systems (HEMSs) maximize profits from buying electricity at a fixed price from utility and selling the surplus energy to an aggregator. Appropriate optimization problems are formulated with technical constraints of household devices and from connection requirements including a volt-watt function installed in the inverter of the rooftop solar-battery system. HEMS responses are optimized in two stages. The first stage is a stochastic program for planning an optimal energy commitment to an aggregator considering forecast errors and the predicted power curtailment. On the day of operation, each HEMS tries to follow the committed energy plan when determining optimal responses in the real-Time condition. Effectiveness of the proposed method is well illustrated through a simulation of a Japanese low-voltage system. Results show that forecast errors and power limitation due to volt-watt functions should be addressed to improve home benefits.

    DOI

  • 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単目的最適出力分担値の多角的評価

    浅見拓一知, 金子曜久, 林泰弘, 野中俊介

    電気学会全国大会講演論文集(CD-ROM)   2018  2018

    J-GLOBAL

  • センサ開閉器の段階的導入に対応したPV連系配電系統のLDC制御パラメータ平面決定手法

    金子曜久, 伊藤雅一, 林泰弘, 大恵慎平, 山本享慶, 大山雅之

    電気学会全国大会講演論文集(CD-ROM)   2018  2018

    J-GLOBAL

  • 広域系統運用における周波数調整用発電機のファジィ理論に基づく多目的出力分担値決定手法

    浅見拓一知, 金子曜久, 林泰弘, 野中俊介

    電気学会電力・エネルギー部門大会論文集(CD-ROM)   2018  2018

    J-GLOBAL

  • Proposal and Evaluation of Determination Method for Multi-Objective Dispatch of Frequency Control Generators Output to Compensate Renewable Energy Systems Fluctuation in Multi Area System Operation

    金子曜久, 林泰弘, 野中俊介

    電気学会電力・エネルギー部門大会論文集(CD-ROM)   2017  2017

    J-GLOBAL

  • PV大量導入時におけるLDC制御パラメータ平面決定手法の提案と評価

    金子曜久, 河野俊介, 伊藤雅一, 林泰弘, 小池健, 山本享慶, 伊藤隆治

    電気学会全国大会講演論文集(CD-ROM)   2017  2017

    J-GLOBAL

  • PV大量導入による電圧無効電力制御への影響評価

    河野俊介, 金子曜久, 藤本悠, 林泰弘, 杉村修平, 植田喜延, 田邊隆之

    電気学会全国大会講演論文集(CD-ROM)   2017  2017

    J-GLOBAL

  • 3分割3連系センサ開閉器計測データを用いた集中電圧制御での不感帯幅の影響評価

    金子曜久, 高橋諒, 赤木覚, 吉永淳, 林泰弘

    電気学会全国大会講演論文集(CD-ROM)   2016  2016

    J-GLOBAL

  • 潮流力率を考慮した連立方程式による分散型電源大量導入に対応したLDC制御パラメータ決定手法

    金子曜久, 河野俊介, 伊藤雅一, 林泰弘, 小池健, 山本享慶, 伊藤隆治

    電気学会電力・エネルギー部門大会論文集(CD-ROM)   2016  2016

    J-GLOBAL

  • Determination of the Most Suitable Voltage Control Method Depending on Photovoltaic Installation Rate

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

    2015 IEEE PES ASIA-PACIFIC POWER AND ENERGY ENGINEERING CONFERENCE (APPEEC)    2015

    　View Summary

    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.

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Syllabus

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Teaching Experience

  • Power Circuit

    Waseda University  

    2021.04
    -
    Now
     

  • Basic experiments of Science and engineering 1B

    Waseda University  

    2021.04
    -
    2024.03
     

  • Basic experiments of Science and engineering 1A

    Waseda University  

    2021.04
    -
    2024.03