Updated on 2025/07/18

写真a

 
SANO Kenichiro
 
Organization
School of Engineering Associate Professor
Title
Associate Professor
External link

Degree

  • 博士（工学） ( 2010.3   東京工業大学 )

Research Interests

  • High Voltage DC Transmission System

  • Power Electronics

Research Areas

  • Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Power engineering  / パワーエレクトロニクス，直流送電

Research History

  • Institute of Science Tokyo   Assistant Professor

    2025.4

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  • Tokyo Institute of Technology   School of Engineering   Assistant Professor

    2018.4 - 2025.3

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  • Central Research Institute of Electric Power Industry   Research Scientist

    2010.4 - 2018.3

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  • 日本学術振興会   特別研究員（DC1）

    2008.4 - 2010.3

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Papers

  • Simulation Methods for Research, Development, and Testing in HVDC Transmission Systems Reviewed

    Kenichiro Sano

    IEEJ Transactions on Power and Energy   145 ( 5 )   399 - 405   2025.5

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    Authorship：Lead author   Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：Institute of Electrical Engineers of Japan (IEE Japan)  

    DOI： 10.1541/ieejpes.145.399

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  • Non-Selective Fault Clearing of Bipolar HVDC Grids Using Series Transformer

    6 ( 119 )   338 - 339   2025.3

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    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

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  • Multilevel Power Conversion Technologies for HVDC Transmission Systems Invited

    S12 ( 5 )   15 - 18   2025.3

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    Authorship：Lead author   Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

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  • Instability and Stabilization Filter of df/dt-Type Virtual Inertia Control Comparing to Synchronous Machines Reviewed

    Takumi Ueda, Kenichiro Sano, Daisuke Terazono, Kaho Nada

    IEEE Open Journal of Power Electronics   6   849 - 857   2025.3

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Institute of Electrical and Electronics Engineers (IEEE)  

    DOI： 10.1109/ojpel.2025.3565697

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  • Virtual Inertia Control Using Modular Multilevel Converters: Application to Constant Voltage Constant Frequency Terminal of HVDC Systems

    2 ( PSE-25-025 )   77 - 81   2025.1

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    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

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  • Non-Selective Fault Clearing for HVDC Grids that Enables Continuous Operation of Offshore Wind Power Plants

    2 ( PSE-25-023 )   63 - 69   2025.1

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    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

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  • Study on the Frequency of Voltage Flicker Caused by the Frequency Feedback Method with Step Injection of Reactive Power

    Study on the, Frequency of Voltage Flicker Caused, by the, Frequency Feedback Method, with Step, Injection of, Reactive Power

    2 ( PSE-25-027 )   89 - 94   2025.1

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    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

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  • Discussion on Instability of Current-controlled Inverter with df/dt-type Virtual Inertia Control Reviewed

    Takumi Ueda, Kenichiro Sano, Daisuke Terazono, Kaho Nada

    2024 IEEE Energy Conversion Congress and Exposition (ECCE)   880 - 882   2024.10

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    Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：IEEE  

    DOI： 10.1109/ecce55643.2024.10860934

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  • Control Study of Enhanced STATCOM for Supercapacitor Applying Virtual Synchronous Generator Control Reviewed

    Kaho Nada, Toshiyuki Fujii, Kenichiro Sano

    2024 IEEE Energy Conversion Congress and Exposition (ECCE)   1377 - 1382   2024.10

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    Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：IEEE  

    DOI： 10.1109/ecce55643.2024.10860829

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  • Loss Evaluation of Cell Capacitor with Quasi-unipolar Modulation for Modular Multilevel Cascade Converter-based Active Power Filter Reviewed

    Takuro Arai, Hiroshi Mochikawa, Kenichiro Sano, Hideaki Fujita

    2024 Energy Conversion Congress & Expo Europe (ECCE Europe)   1 - 7   2024.9

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    Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：IEEE  

    DOI： 10.1109/ecceeurope62508.2024.10751912

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  • Applicability of Low-speed DC Circuit Breakers for Multi-circuit HVDC Transmission:Reduction of Arrester Consumption Energy by Mitigating the Voltage Rating

    8   9 - 15   2024.9

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    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

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  • Partial Reconfiguration Method for Continuous Operation of Offshore Wind Power Plants in a Three-Terminal Bipolar HVDC Grid

    7   1 - 8   2024.9

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    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

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  • Experimental verification of multi-circuit HVDC system using low-speed protection method

    4 ( PE-24-169 )   71 - 79   2024.9

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    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

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  • Discussion on Instability of Current-controlled Inverter with df/dt-type Virtual Inertia Control and a Design of the Stabilization Filter

    11   1 - 6   2024.9

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    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

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  • Virtual Inertia Control by Modular Multilevel Converters: Relationship between Cell Capacitor Voltage and Virtual Inertia

    10   7 - 12   2024.9

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    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

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  • Reconfiguration of Bipolar HVDC System for Continuous Transmission Under DC Line Fault Reviewed

    Mitsuyoshi Enomoto, Kenichiro Sano, Junya Kanno, Junichi Fukushima

    IEEE Transactions on Power Electronics   vol. ( no. )   2024.7

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    Language：English   Publishing type：Research paper (scientific journal)  

    This article proposes a reconfiguration method for the bipolar high voltage dc transmission (HVDC) system connecting offshore wind power plants (WPPs). Conventional bipolar HVDC systems can continue to transmit half the rated power even if a dc fault occurs at one of the two poles. However, the shutdown of half of the entire WPPs is inevitable because WPPs cannot continue operations on their own. Once the WPPs are shut down, they take a long time to restart. The power transmission decreases during the time and it imposes a negative effect on the onshore ac system. The proposed reconfiguration method immediately removes the dc fault and relocates the converters and WPPs from the faulted pole to the healthy pole by disconnecting switches. Furthermore, the reconfiguration is designed based on the fault ride-through (FRT) capability of the WPPs specified by the existing grid code. As a result, the reconfiguration realizes the continuous operation of the entire WPPs even if a dc line fault occurs. Therefore, the proposed method can improve the supply reliability. The validity of the proposed method is verified by electromagnetic transient (EMT) simulations.

    DOI： 10.1109/TPEL.2024.3381218

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  • AC Fault Ride-Through Method of HVDC Interconnector for Islanded AC Grid With Offshore Wind Farm and Loads Reviewed International coauthorship

    Nikola Krneta, Kenichiro Sano

    IEEE Access   vol. 12   2024.4

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    Language：English   Publishing type：Research paper (scientific journal)  

    This paper proposes an ac fault ride-through (FRT) method for high-voltage dc (HVDC) transmission systems that serve as an interconnector between the onshore ac grid and an islanded offshore ac grid. In conventional HVDC systems for offshore wind farms FRT is realized by consuming excess power with braking resistors. However, the same method cannot be applied if the offshore ac grid includes not only wind farms but also various loads, which are being considered for integration into multipurpose interconnectors or energy islands. In this article, a novel FRT method based on voltage control for HVDC interconnectors operating with bidirectional power flow is proposed. The proposed method curtails the ac voltage formed by the offshore converter according to the converter’s dc current and voltage. The effectiveness of the proposed FRT method is established through experiments on a mini model.

    DOI： 10.1109/ACCESS.2024.3394322

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  • パワーエレクトロニクスで相互接続された電力システム

    佐野 憲一朗

    スマートグリッド2024年1月号   2024.1

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    Language：Japanese   Publisher：大河出版  

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  • 直流送電の利用拡大と将来の広域送電網

    佐野 憲一朗

    電気学会誌   2023.9

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    Language：Japanese   Publisher：電気学会  

    DOI： 10.1541/ieejjournal.143.580

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  • MMCのセルコンデンサ電流を低減できる変調法の提案とアクティブフィルタへの応用

    新井 卓郎, 餅川 宏, 佐野 憲一朗, 藤田 英明

    電気学会論文誌Ｄ（産業応用部門誌）   vol. 143 ( no. 8 )   2023.8

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    Language：Japanese   Publishing type：Research paper (scientific journal)  

    DOI： 10.1541/ieejias.143.590

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  • A DC Fault Ride-Through Control of Half-Bridge MMCs for the HVDC Grid with DC Circuit Breakers

    Atsushi Chiba, Kenichiro Sano, Yushi Koyama, Kei Sekiguchi, Takahiro Ishiguro, Daichi Suzuki

    IEEJ Journal of Industry Applications   vol. 12 ( no. 3 )   2023.5

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    Operation delay of DC circuit breakers causes a voltage sag of several milliseconds in high-voltage DC (HVDC) grids. The DC voltage sag can cause an overcurrent in the DC side of the modular multilevel converter (MMC), resulting in halting the MMC. This study investigates a method to facilitate continuous operation of the half-bridge MMC during a DC voltage sag. The proposed method performs feedback control of the DC current during DC voltage sags by decreasing the DC and AC voltages of the half-bridge MMC. When the method is applied to symmetrical monopole HVDC systems, the MMC can maintain both its DC and AC currents within the rated range during the voltage sag caused by pole-to-ground faults. Simulation results obtained by a three-terminal HVDC grid verify the DC fault ride-through capability of the half-bridge MMC.

    DOI： 10.1541/ieejjia.22006950

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  • Continuous Operation of Wind Power Plants Under Pole-to-Ground Fault in an HVDC System Consisting of Half-Bridge MMCs and Disconnecting Switches

    Mitsuyoshi Enomoto, Kenichiro Sano, Junya Kanno, Junichi Fukushima

    IEEE Transactions on Power Electronics   vol. 38 ( no. 3 )   2023.3

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    This paper focuses on a multi-circuit HVDC system which can localize the DC line fault without DC circuit breakers. The conventional fault clearing method causes the shutdown and the restart of the wind power plants, which results in the suspension of the power supply. The suspension may affect the balance of supply and demand, and may cause frequency drop in the onshore AC power system. To solve the problem, this paper proposes a system switching method to enable the continuous operation of the wind power plants under the DC line fault. The proposed method utilizes the half-bridge modular multilevel converter (HB-MMC) to clear the fault while keeping the wind power plants operating. As a result, the proposed method realizes the continuous operation of wind power plants and shorten the transmission outage to 0.2 s. Thus, it greatly increases the supply reliability. Experimental results demonstrate the validity of the proposed method.

    DOI： 10.1109/TPEL.2022.3225209

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  • 多端子連系をはじめとする直流送電の最新技術動向

    多端子連系をはじめとする直流送電の最新技術動向調査専門委員会, 佐野憲一朗

    Vol. 1538   2022.10

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    Language：Japanese   Publisher：電気学会技術報告  

    再生可能エネルギー由来の出力不安定な分散形電源の大量導入が進むなか，電気エネルギーの安定供給を維持し続けるため，電力系統の計画・運用・制御についてさらなる技術革新が進められている。我が国において系統間電力融通を考えるとき，あるいは洋上風力発電の発電電力を陸上に輸送する方法を考えるとき，いずれの局面においても直流送電は有用な技術のひとつとなっている。
    近年では特に，洋上風力発電の電力を複数箇所の陸上に送電するような場面において，多端子直流送電に大きな期待が寄せられている。例えば，国内では大規模な洋上風力発電の発電電力を陸上に送電するための技術として多端子直流送電システムの研究開発が推進されている。
    そこで，大容量洋上風力発電の柔軟な系統連系を可能にする多端子直流送電や，分散形電源の連系容量増加や電力自由化の進展に伴う直流送電の技術動向から今後適用が期待される役割や新要素技術にいたるまで，最新の直流送電技術の動向調査を行うことを目的として，「多端子連系をはじめとする直流送電の最新技術動向調査専門委員会」が令和2年1月～令和4年12月までの3年間，設置し，計12回の委員会が開催した。本技術報告はこの調査専門委員会での調査結果をまとめた。

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  • A Variable Admittance Shunt Capacitor Using Series Inverter for Filtering Harmonics of Distribution Systems

    Guilherme Cirilo Leandro, Kenichiro Sano, Naotaka Okada

    IEEE Journal of Emerging and Selected Topics in Power Electronics   vol. 10 ( no. 3 )   2022.6

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    Conventional shunt capacitors (SC) with series reactor can filter the harmonic currents generated by the load in addition to improving the power factor. However, a trade-off exists between the harmonic filtering effect and the harmonic voltage tolerance because its admittance is fixed. This paper focuses on the SC with series inverter (active SC) and proposes a novel control system to satisfy both the harmonic filtering effect and the harmonic voltage tolerance. The proposed control system adjusts the equivalent admittance of the active SC according to the grid harmonic voltage. The active SC contributes to the harmonic compensation in normal condition. When the harmonic voltage rises excessively, it protects itself from the overload. Theoretical analysis reveals that the DC voltage of the inverter can be as low as 10% of the rated grid voltage. Experimental results verify that the active SC can filter a harmonic current as high as 50% of its rated current, and tolerate a harmonic voltage around two times higher than the conventional SC with series reactor. Moreover, it is verified that the active SC can operate properly under unbalanced grid voltage and transients of harmonic voltages.

    DOI： 10.1109/JESTPE.2021.3132258

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  • Comparison and Selection of Grid-Tied Inverter Models for Accurate and Efficient EMT Simulations

    Kenichiro Sano, Shuntaro Horiuchi, Taku Noda

    IEEE Transactions on Power Electronics   37 ( 3 )   3462 - 3472   2022.3

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Institute of Electrical and Electronics Engineers ({IEEE})  

    This paper compares five modeling methods of grid-tied inverters for the electromagnetic transient (EMT) simulation of power system, clarifies their differences, and discusses the suitable model for each simulation purpose. The comparison was made under the same conditions between the conventional switching (SW) model, and four simplified models: Voltage interpolation (VI), average-value (AV), controlled current-injection (CCI), and simplified current-injection (SCI) model.
    The comparison of the simulated waveforms clarifies the behaviors that can be simulated and cannot be simulated by each simplified model. The comparison of the computing time reveals the significant decrease of the computing time by selecting the proper simplified modeling method. Based on these comparisons, this paper discusses the selection of the modeling methods for each simulation purpose to perform simulations accurately and efficiently.

    DOI： 10.1109/TPEL.2021.3117633

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  • 多回線直流送電の系統切替時における発電設備の運転継続法

    榎本光芳, 佐野憲一朗, 菅野純弥, 福嶋純一

    電気学会論文誌Ｂ（電力・エネルギー部門誌）   vol. 142 ( no. 1 )   2022.1

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  • A shunt capacitor equipped with a series inverter for compensating harmonics along with existing equipment

    Sano, K., Leandro, G.C., Okada, N.

    IEEJ Transactions on Power and Energy   vol. 141 ( no. 1 )   2021.1

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    Language：Japanese   Publishing type：Research paper (scientific journal)  

    DOI： 10.1541/ieejpes.141.27

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  • A Fault Protection Method for Avoiding Overvoltage in Symmetrical Monopole HVDC Systems by Half-Bridge MMC

    Kenichiro Sano, Hiro Nakayama

    IEEE Access   9   165219 - 165226   2021

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    Publishing type：Research paper (scientific journal)   Publisher：Institute of Electrical and Electronics Engineers (IEEE)  

    DOI： 10.1109/access.2021.3134248

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  • Loss reduction of modular multilevel converter with balancing circuit for low-voltage grid converter

    Takuro Arai, Kei Sekiguchi, Hiroshi Mochikawa, Kenichiro Sano, Hideaki Fujita

    IEEJ Transactions on Industry Applications   141 ( 6 )   461 - 471   2021

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    Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：Institute of Electrical Engineers of Japan  

    DOI： 10.1541/ieejias.141.461

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  • A Method to Consider Voltage Distortion Caused by Interaction Grid-Connected Inverter and Distribution System

    Naotaka Okada, Kentaro Fukushima, Kenichiro Sano

    23rd International Conference on Electrical Machines and Systems, ICEMS 2020   630 - 635   2020.11

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    Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：Institute of Electrical and Electronics Engineers Inc.  

    DOI： 10.23919/ICEMS50442.2020.9291251

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  • Evaluation of Required Energy Storage in Neutral-Point-Clamped Modular Multilevel Converter for Downsizing Low-Voltage Grid Converters

    Takuro Arai, Kei Sekiguchi, Hiroshi Mochikawa, Kenichiro Sano, Hideaki Fujita

    IEEE Transactions on Power Electronics   36 ( 6 )   6774 - 6786   2020.11

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Institute of Electrical and Electronics Engineers ({IEEE})  

    DOI： 10.1109/TPEL.2020.3037936

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  • A Protection Circuit for the Shunt Capacitor equipped with a Series Inverter under Voltage Sags

    Guilherme Cirilo Leandro, Kenichiro Sano, Naotaka Okada

    2020 5th IEEE Workshop on the Electronic Grid, eGRID 2020   2020.11

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    Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：Institute of Electrical and Electronics Engineers Inc.  

    DOI： 10.1109/eGRID48559.2020.9330670

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  • A configuration of multi-circuit HVDC transmission system for offshore wind power plants and its protection scheme for DC line faults,洋上風力発電向け多回線直流送電の基本構成と直流線路事故時の保護方式

    Nakayama, H., Sano, K.

    IEEJ Transactions on Power and Energy   vol. 140 ( no. 11 )   795 - 802   2020.11

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    Language：Japanese   Publishing type：Research paper (scientific journal)  

    DOI： 10.1541/ieejpes.140.795

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  • An Overvoltage-Less Protection Method for Pole-to-Ground Faults in Symmetrical Monopole HVDC Systems by Half-Bridge MMC

    Kenichiro Sano, Hiro Nakayama

    ECCE 2020 - IEEE Energy Conversion Congress and Exposition   3383 - 3388   2020.10

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    Publishing type：Research paper (international conference proceedings)  

    DOI： 10.1109/ECCE44975.2020.9236061

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  • An Inverter Model Simulating Accurate Harmonics with Low Computational Burden for Electromagnetic Transient Simulations

    Shuntarou Horiuchi, Kenichiro Sano, Taku Noda

    IEEE Transactions on Power Electronics   Vol. 36 ( No. 4 )   5389 - 5397   2020.9

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Institute of Electrical and Electronics Engineers ({IEEE})  

    DOI： 10.1109/TPEL.2020.3026721

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  • A Shunt Capacitor equipped with a Series Inverter being Compatible with Existing Shunt Capacitors

    Guilherme Cirilo Leandro, Kenichiro Sano, Naotaka Okada

    UPEC 2020 - 2020 55th International Universities Power Engineering Conference, Proceedings   2020.9

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    Publishing type：Research paper (international conference proceedings)  

    DOI： 10.1109/UPEC49904.2020.9209863

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  • A Voltage Interpolation Method in Inverter Modeling for Fast Electromagnetic Transient Simulations

    Shuntaro Horiuchi, Kenichiro Sano, Taku Noda

    Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC   2020-March   2841 - 2847   2020.3

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    Publishing type：Research paper (international conference proceedings)  

    DOI： 10.1109/APEC39645.2020.9124494

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  • A configuration of multi-circuit HVDC transmission system for offshore wind power plants and its protection scheme for DC line faults

    Nakayama, H., Sano, K.

    Electrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi)   214 ( 2 )   2020

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    Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/eej.23318

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  • 電力系統用パワーエレクトロニクス機器の解析・シミュレータ技術

    電力系統用パワーエレクトロニクス機器の解析, シミュレータ技術調査専門委員会, 佐野憲一朗

    vol. 1459   2019.6

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    Language：Japanese   Publisher：電気学会技術報告  

    わが国では，電力広域的運営推進機関の設置に伴い，地域間の電力融通や送電網の増強が議論され，広域連系系統計画には直流技術の東京中部間連系設備のさらなる増強なども議論，計画されている。また，わが国の信頼度の高い電力系統においても安定度，電圧などの系統課題が顕在化しており，解決策として自励交直変換器などの機器技術の適用が活発化している。欧州では，大容量洋上ウィンドファームの計画，建設が進み，陸上変電所との接続手段として自励直流送電を適用したプロジェクトが複数実用化されている。交流送電接続時も陸上変電所側の電圧変動抑制対策としてSTATCOMを適用した事例が多い。
    電力系統用パワーエレクトロニクス機器は将来の電力系統に有益な電力用機器としての潜在能力を秘め，電力送電手段として，系統諸問題対策として今後さらに適用が広がる可能性がある。機器の導入計画，設計製作等の実務や学術研究では，系統解析ツールやリアルタイムシミュレータが強力な検討手段であるが，通常の交流系統解析とは著しく異なり独特な考慮や注意が必要となる。そこで，本技術報告では，電力系統用パワーエレクトロニクス機器の解析ツール，手法，事例，シミュレータ技術，試験例などを調査し取り纏めた。STATCOM，自励直流送電などを電力系統へ適用する際の計画，設計，製作，運用等に関わる技術者・研究者に有益な情報を提供するものである。

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  • Requirements and comparisons of DC circuit breakers for HVDC grids Reviewed

    Sano, K.

    IEEJ Transactions on Industry Applications   Vol. 139 ( No. 3 )   348 - 359   2019.3

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    Language：Japanese   Publishing type：Research paper (scientific journal)  

    DOI： 10.1541/ieejias.139.348

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  • An electromagnetic transient simulation model of grid-connected inverters for dynamic voltage analysis of distribution systems

    Sano, K., Yonezawa, R., Noda, T.

    Electrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi)   206 ( 4 )   11 - 21   2019

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/eej.23179

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  • A Suppression Method of Harmonic Instability in Line-Commutated Converters Applying Active Harmonic Filters

    Kenichiro Sano, Toshiaki Kikuma, Tatsuhito Nakajima, Junya Kanno

    2018 International Power Electronics Conference, IPEC-Niigata - ECCE Asia 2018   3299 - 3303   2018.10

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    Publishing type：Research paper (international conference proceedings)  

    DOI： 10.23919/IPEC.2018.8507571

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  • Criterion for continuous oscillation of reactive power caused by the frequency feedback method with step injection of reactive power Reviewed

    Sano, K., Okada, N., Shirasaki, K., Iwatsuki, H.

    IEEJ Transactions on Power and Energy   Vol. 138 ( No. 8 )   659 - 670   2018.8

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    Language：Japanese   Publishing type：Research paper (scientific journal)  

    DOI： 10.1541/ieejpes.138.659

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  • An electromagnetic transient simulation model of grid-connected inverters for dynamic voltage analysis of distribution systems Reviewed

    Kenichiro Sano, Rikido Yonezawa, Taku Noda

    Electrical Engineering in Japan   Vol. 138 ( No. 8 )   2018.8

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    Language：Japanese   Publishing type：Research paper (scientific journal)  

    DOI： 10.1541/ieejpes.138.685

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  • Experimental validation of factors causing flicker from frequency feedback method with step injection of reactive power Reviewed

    Shirasaki, K., Okada, N., Sano, K., Iwatsuki, H.

    IEEJ Transactions on Power and Energy   Vol. 138 ( No. 8 )   651 - 658   2018.8

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    Language：Japanese   Publishing type：Research paper (scientific journal)  

    DOI： 10.1541/ieejpes.138.651

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  • A Transformerless 6.6-kV STATCOM Based on a Hybrid Cascade Multilevel Converter Using SiC Devices Reviewed

    Koyama, Y., Nakazawa, Y., Mochikawa, H., Kuzumaki, A., Sano, K., Okada, N.

    IEEE Transactions on Power Electronics   33 ( 9 )   7411 - 7423   2018

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    DOI： 10.1109/TPEL.2017.2770143

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  • An electromagnetic transient simulation model of grid-connected inverters for dynamic voltage analysis of distribution systems

    Sano, K., Yonezawa, R., Noda, T.

    IEEJ Transactions on Power and Energy   138 ( 8 )   685 - 694   2018

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    Publishing type：Research paper (scientific journal)  

    DOI： 10.1541/ieejpes.138.685

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  • A Transformerless 6.6-kV STATCOM based on Hybrid Cascade Multilevel Converter using SiC Devices

    Yushi Koyama, Yosuke Nakazawa, Hiroshi Mochikawa, Atsuhiko Kuzumaki, Kenichiro Sano, Naotaka Okada

    IEEE Transactions on Power Electronics   vol. 33 ( no. 9 )   2017.11

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    Language：English   Publishing type：Research paper (scientific journal)  

    We have developed a full-scale prototype of transformerless static synchronous compensator (STATCOM), rated at 6.6 kV and 100 kVA, based on a hybrid cascade multilevel converter using SiC devices. The topology employs multi-voltage converter cells, Si and SiC semiconductor devices, and hybrid modulations in the converters. One phase of the STATCOM has two Si-IGBT converter cells and two SiC-JFET converter cells connected in series. The SiC cells are operated with high-frequency PWM. The Si cells carry higher DC voltage, resulting in smaller converter volume by reducing the number of cascaded cells. To minimize the loss, the Si cells are operated with one-pulse. The balance control of DC voltage of the hybrid cells is also discussed. We tested the developed STATCOM in a full-scale 6.6-kV distribution grid. The experimental results show a stable rated operation and fault-ride-through performances. Moreover, we analyzed its loss and volume and discussed them based on the developed STATCOM. The estimated loss was approximately 0.3% at rated power, which is comparable to an all-SiC configuration. It also has an advantage in its small volume compared with other configurations. These analyses revealed that the hybrid configuration is a suitable topology for low loss and small-size distribution STATCOM.

    DOI： 10.1109/TPEL.2017.2770143

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  • Technical Trends in New-Type Voltage Source AC/DC Converters for Power Systems : with Special Focuses on Modular Multilevel Converter (MMC)

    Vol. 1374 ( 1374 )   1 - 59,裏表紙   2016.4

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  • DC Fault Clearing Characteristics of a Bulk Power VSC HVDC Transmission System using DC Circuit Breakers Reviewed

    Kimura, R., Yokoyama, A., Sano, K.

    Electrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi)   197 ( 3 )   18 - 28   2016

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    Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/eej.22862

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  • System fault test of SiC device applied 6.6kV transformerless D-STATCOM

    Yushi Koyama, Yosuke Nakazawa, Hiroshi Mochikawa, Atsuhiko Kuzumaki, Naotaka Okada, Kenichiro Sano

    2015 17th European Conference on Power Electronics and Applications, EPE-ECCE Europe 2015   2015.10

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    Publishing type：Research paper (international conference proceedings)  

    DOI： 10.1109/EPE.2015.7309063

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  • 半導体直流遮断器を適用した大容量自励式直流送電システムの直流事故除去特性

    木村 諒太, 横山 明彦, 佐野 憲一朗

    電気学会論文誌Ｂ（電力・エネルギー部門誌）   Vol. 135 ( No. 8 )   2015.8

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    Language：Japanese   Publishing type：Research paper (scientific journal)  

    DOI： 10.1541/ieejpes.135.493

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  • DC fault clearing characteristics of a bulk power VSC HVDC transmission system using DC circuit breakers Reviewed

    Kimura, R., Yokoyama, A., Sano, K.

    IEEJ Transactions on Power and Energy   135 ( 8 )   493 - 501   2015

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    Publishing type：Research paper (scientific journal)  

    DOI： 10.1541/ieejpes.135.493

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  • 調査研究委員会レポート：電力系統用新方式自励交直変換器調査専門委員会

    中島 達人, 菅野 純弥, 佐野 憲一朗

    電気学会論文誌Ｂ（電力・エネルギー部門誌）   134 ( 11 )   NL11_6 - NL11_6   2014

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    Language：Japanese   Publisher：一般社団法人 電気学会  

    DOI： 10.1541/ieejpes.134.nl11_6

    CiNii Research

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  • A surgeless solid-state DC circuit breaker for voltage-source-converter- based HVDC systems Reviewed

    Sano, K., Takasaki, M.

    IEEE Transactions on Industry Applications   50 ( 4 )   4426 - 4431   2014

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1109/TIA.2013.2293819

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  • SiCパワー半導体の電力機器への適用 (特集 新しいパワー半導体の研究開発,利用の動向) Reviewed

    佐野 憲一朗, 岡田 有功

    電気評論   98 ( 10 )   25 - 29   2013.10

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  • A boost conversion system consisting of multiple DC-DC converter modules for interfacing wind farms and HVDC transmission

    Kenichiro Sano, Masahiro Takasaki

    2013 IEEE Energy Conversion Congress and Exposition, ECCE 2013   2613 - 2618   2013

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    Publishing type：Research paper (international conference proceedings)  

    DOI： 10.1109/ECCE.2013.6647038

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  • A transformerless D-STATCOM based on a multivoltage cascade converter requiring NO DC sources Reviewed

    Sano, K., Takasaki, M.

    IEEE Transactions on Power Electronics   27 ( 6 )   3151 - 3158   2012

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1109/TPEL.2011.2174383

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  • Performance of a high-efficiency switched-capacitor-based resonant converter with phase-shift control Reviewed

    Sano, K., Fujita, H.

    IEEE Transactions on Power Electronics   26 ( 2 )   344 - 354   2011

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    Publishing type：Research paper (scientific journal)  

    DOI： 10.1109/TPEL.2010.2062537

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  • Reducing output current ripple of resonant switched-capacitor step-up converter with interleaving technique

    Kenichiro Sano, Takuro Arai, Hideaki Fujita

    2010 International Power Electronics Conference - ECCE Asia -, IPEC 2010   1635 - 1641   2010

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    Publishing type：Research paper (international conference proceedings)  

    DOI： 10.1109/IPEC.2010.5544632

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  • Design of a photovoltaic simulator with a novel reference signal generator and two-stage LC output filter Reviewed

    Koran, A., Sano, K., Kim, R.-Y., Lai, J.-S.

    IEEE Transactions on Power Electronics   25 ( 5 )   1331 - 1338   2010

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    Publishing type：Research paper (scientific journal)  

    DOI： 10.1109/TPEL.2009.2037501

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  • A resonant switched-capacitor converter for voltage balancing of several capacitors connected in series Reviewed

    Sano, K., Fujita, H.

    IEEJ Transactions on Industry Applications   129 ( 6 )   2009

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    Publishing type：Research paper (scientific journal)  

    DOI： 10.1541/ieejias.129.628

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  • A resonant switched-capacitor converter for voltage balancing of series-connected capacitors

    Kenichiro Sano, Hideaki Fujita

    Proceedings of the International Conference on Power Electronics and Drive Systems   683 - 688   2009

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    Publishing type：Research paper (international conference proceedings)  

    DOI： 10.1109/PEDS.2009.5385680

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  • Design of a photovoltaic simulator with a novel reference signal generator and two-stage LC output filter

    Ahmed Koran, Kenichiro Sano, Rae Young Kim, Jih Sheng Lai

    2009 IEEE Energy Conversion Congress and Exposition, ECCE 2009   319 - 326   2009

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    Publishing type：Research paper (international conference proceedings)  

    DOI： 10.1109/ECCE.2009.5316190

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  • A new control method of a resonant switched-capacitor converter and the application for balancing of the split DC voltages in a multilevel inverter Reviewed

    Sano, K., Fujita, H.

    Electrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi)   168 ( 2 )   69 - 79   2009

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    Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/eej.20719

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  • Voltage-balancing circuit based on a resonant switched-capacitor converter for multilevel inverters Reviewed

    Sano, K., Fujita, H.

    IEEE Transactions on Industry Applications   44 ( 6 )   1768 - 1776   2008

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1109/TIA.2008.2006291

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  • Dynamic control and performance of a resonant switched-capacitor converter based on phase-shift control Reviewed

    Sano, K., Fujita, H.

    IEEJ Transactions on Industry Applications   128 ( 10 )   3509 - 3515   2008

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    Language：Japanese   Publishing type：Research paper (scientific journal)  

    DOI： 10.1541/ieejias.128.1190

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  • A new control method of a resonant switched-capacitor converter and the application for balancing of the split DC voltages in a multilevel inverter Reviewed

    Sano, K., Fujita, H.

    IEEJ Transactions on Industry Applications   127 ( 3 )   122 - 129   2007

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    Publishing type：Research paper (scientific journal)  

    DOI： 10.1541/ieejias.127.330

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Industrial property rights

  • 送電制御装置、直流送電システム、及びプログラム

    榎本 光芳, 佐野 憲一朗, 福嶋 純一, 菅野 純弥

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    Applicant：国立大学法人東京工業大学, 東京電力ホールディングス株式会社

    Application no：特願2023-096536  Date applied：2023.6

    Announcement no：特開2024-084107  Date announced：2024.6

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  • 直流母線装置、変電所、直流送電システム

    佐野 憲一朗

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    Applicant：国立大学法人東京工業大学

    Application no：特願2021-194414  Date applied：2021.11

    Announcement no：特開2023-080872  Date announced：2023.6

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  • 電力変換器、直流送電システム、および電力変換方法

    佐野 憲一朗, 児山 裕史, 関口 慧, 石黒 崇裕, 鈴木 大地

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    Applicant：東芝エネルギーシステムズ株式会社, 国立大学法人東京工業大学

    Application no：特願2021-020875  Date applied：2021.2

    Announcement no：特開2022-123517  Date announced：2022.8

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  • 電力変換器、直流送電システム、および電力変換方法

    佐野 憲一朗, 児山 裕史, 関口 慧, 石黒 崇裕, 鈴木 大地

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    Applicant：東芝エネルギーシステムズ株式会社, 国立大学法人東京工業大学

    Application no：特願2021-020875  Date applied：2021.2

    Announcement no：特開2022-123517  Date announced：2022.8

    Patent/Registration no：特許第7404283号  Date registered：2023.12 

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  • 電力系統用アクティブフィルタ装置

    佐野 憲一朗

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    Applicant：国立大学法人東京工業大学

    Application no：特願2019-147327  Date applied：2019.8

    Announcement no：特開2021-029070  Date announced：2021.2

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  • 電力系統用アクティブフィルタ装置

    佐野 憲一朗

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    Applicant：国立大学法人東京工業大学

    Application no：特願2019-147327  Date applied：2019.8

    Announcement no：特開2021-029070  Date announced：2021.2

    Patent/Registration no：特許第7274209号  Date registered：2023.5 

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  • 直流送電システム

    佐野 憲一朗, 中山 比呂

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    Applicant：国立大学法人東京工業大学

    Application no：特願2019-111416  Date applied：2019.6

    Announcement no：特開2020-205673  Date announced：2020.12

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  • 直流送電システム

    佐野 憲一朗, 中山 比呂

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    Applicant：国立大学法人東京工業大学

    Application no：特願2019-111416  Date applied：2019.6

    Announcement no：特開2020-205673  Date announced：2020.12

    Patent/Registration no：特許第7304619号  Date registered：2023.6 

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  • 直流送電設備

    佐野 憲一朗

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    Applicant：一般財団法人電力中央研究所

    Application no：特願2017-145873  Date applied：2017.7

    Announcement no：特開2019-030086  Date announced：2019.2

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  • 直流送電設備

    佐野 憲一朗

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    Applicant：一般財団法人電力中央研究所

    Application no：特願2017-145873  Date applied：2017.7

    Announcement no：特開2019-030086  Date announced：2019.2

    Patent/Registration no：特許第6867090号  Date registered：2021.4 

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  • 三相インバータ瞬時値解析装置、三相インバータ瞬時値解析方法およびプログラム

    佐野 憲一朗, 米澤 力道, 野田 琢

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    Applicant：一般財団法人電力中央研究所

    Application no：特願2017-090542  Date applied：2017.4

    Announcement no：特開2018-190090  Date announced：2018.11

    Patent/Registration no：特許第6864546号  Date registered：2021.4 

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  • 三相インバータ瞬時値解析装置、三相インバータ瞬時値解析方法およびプログラム

    佐野 憲一朗, 米澤 力道, 野田 琢

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    Applicant：一般財団法人電力中央研究所

    Application no：特願2017-090542  Date applied：2017.4

    Announcement no：特開2018-190090  Date announced：2018.11

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  • 直流送電設備

    佐野 憲一朗

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    Applicant：一般財団法人電力中央研究所

    Application no：特願2016-203025  Date applied：2016.10

    Announcement no：特開2018-064433  Date announced：2018.4

    Patent/Registration no：特許第6856303号  Date registered：2021.3 

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  • 直流送電設備

    佐野 憲一朗

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    Applicant：一般財団法人電力中央研究所

    Application no：特願2016-203025  Date applied：2016.10

    Announcement no：特開2018-064433  Date announced：2018.4

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  • 電力変換システム

    佐野 憲一朗, 菊間 俊明, 宜保 直樹

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    Applicant：一般財団法人電力中央研究所

    Application no：特願2016-137999  Date applied：2016.7

    Announcement no：特開2018-011405  Date announced：2018.1

    Patent/Registration no：特許第6747756号  Date registered：2020.8 

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  • 電力変換システム

    佐野 憲一朗, 菊間 俊明, 宜保 直樹

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    Applicant：一般財団法人電力中央研究所

    Application no：特願2016-137999  Date applied：2016.7

    Announcement no：特開2018-011405  Date announced：2018.1

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  • 太陽光発電設備の異常診断方法、異常診断装置、及び異常診断プログラム

    伊藤 憲彦, 佐野 憲一朗, 菅野 純弥

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    Applicant：一般財団法人電力中央研究所, 東京電力ホールディングス株式会社

    Application no：特願2016-065048  Date applied：2016.3

    Announcement no：特開2017-181138  Date announced：2017.10

    Patent/Registration no：特許第6714962号  Date registered：2020.6 

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  • 太陽光発電設備の異常診断方法、異常診断装置、及び異常診断プログラム

    伊藤 憲彦, 佐野 憲一朗, 菅野 純弥

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    Applicant：一般財団法人電力中央研究所, 東京電力ホールディングス株式会社

    Application no：特願2016-065048  Date applied：2016.3

    Announcement no：特開2017-181138  Date announced：2017.10

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  • 直流送電システム

    佐野 憲一朗, 宜保 直樹

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    Applicant：一般財団法人電力中央研究所

    Application no：特願2014-245397  Date applied：2014.12

    Announcement no：特開2016-001981  Date announced：2016.1

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  • 直流昇圧変換器、制御方法及びコンバータ部制御装置

    佐野 憲一朗, 高崎 昌洋

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    Applicant：一般財団法人電力中央研究所

    Application no：特願2013-129888  Date applied：2013.6

    Announcement no：特開2015-006066  Date announced：2015.1

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  • 直流昇圧変換器、制御方法及びコンバータ部制御装置

    佐野 憲一朗, 高崎 昌洋

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    Applicant：一般財団法人電力中央研究所

    Application no：特願2013-129888  Date applied：2013.6

    Announcement no：特開2015-006066  Date announced：2015.1

    Patent/Registration no：特許第6194193号  Date registered：2017.8 

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  • 電流遮断回路、送電システム及び電流遮断回路制御方法

    佐野 憲一朗, 高崎 昌洋

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    Applicant：一般財団法人電力中央研究所

    Application no：特願2012-022359  Date applied：2012.2

    Announcement no：特開2013-161642  Date announced：2013.8

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  • 電流遮断回路、送電システム及び電流遮断回路制御方法

    佐野 憲一朗, 高崎 昌洋

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    Applicant：一般財団法人電力中央研究所

    Application no：特願2012-022359  Date applied：2012.2

    Announcement no：特開2013-161642  Date announced：2013.8

    Patent/Registration no：特許第5965655号  Date registered：2016.7 

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  • 無効電力補償装置

    佐野 憲一朗, 高崎 昌洋, 菊間 俊明, 村尾 武, 餅川 宏, 葛巻 淳彦

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    Applicant：一般財団法人電力中央研究所, 株式会社東芝

    Application no：特願2011-036829  Date applied：2011.2

    Announcement no：特開2012-175848  Date announced：2012.9

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  • 無効電力補償装置

    佐野 憲一朗, 高崎 昌洋, 菊間 俊明, 村尾 武, 餅川 宏, 葛巻 淳彦

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    Applicant：一般財団法人電力中央研究所, 株式会社東芝

    Application no：特願2011-036829  Date applied：2011.2

    Announcement no：特開2012-175848  Date announced：2012.9

    Patent/Registration no：特許第5593253号  Date registered：2014.8 

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Awards

  • 電気学術振興賞・論文賞

    2019   電気学会   ステップ注入付周波数フィードバック方式に起因する無効電力振動の継続条件

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  • 全国大会優秀論文発表賞

    2018   電気学会   単相非線形負荷による13%直列リアクトル付進相コンデンサの高調波引込み現象

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  • 研究会優秀論文発表賞

    2017   電気学会   ステップ注入付周波数フィードバック方式に起因する無効電力振動の継続条件

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  • 理事長表彰

    2017   電力中央研究所   太陽光発電設備集中連系による配電系統のフリッカ障害に対する迅速な発生要因の究明と対策法策定の貢献

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  • 産業応用部門 部門奨励賞（高橋勲賞）

    2009   電気学会  

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  • 産業応用部門大会優秀論文発表賞

    2009   電気学会   位相シフト制御法を適用した共振型スイッチトキャパシタコンバータの出力電圧調整特性と効率評価

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  • 電気学術振興賞・論文賞

    2007   電気学会   共振形スイッチトキャパシタコンバータの新制御法とマルチレベルインバータの直流電圧均一化回路への応用

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  • 研究会優秀論文発表賞

    2006   電気学会   共振形スイッチトキャパシタコンバータの新制御法とマルチレベルインバータの直流電圧均一化回路への応用

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Research Projects

  • 脱炭素社会の電力安定供給を支える高信頼度の直流送電系統の研究

    Grant number：21K04018  2021.4 - 2024.3

    日本学術振興会  科学研究費助成事業  基盤研究(C)

    佐野 憲一朗

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    Grant amount：\4160000 （ Direct Cost: \3200000 、 Indirect Cost：\960000 ）

    再生可能エネルギーの大規模導入と需給調整のための電力融通拡大を背景に，電力系統の広域連系が進められている。これに伴い，大容量長距離送電に適した直流送電の導入が世界的に活発化している。また将来的には，既存の複数の電力系統をつなぐ形で，直流送電による基幹送電系統（直流系統）を構築するという構想が描かれている。一方で，重要な社会インフラである基幹送電系統には，設備の故障時にも送電を継続できる高い信頼度が求められる。交流による既存の基幹送電系統では，ネットワーク全体として高い信頼度を実現してきた。ところが直流送電では，ネットワークを構築した際に高い信頼度を実現する方法が確立されていない。そこで本研究では，単一設備故障時にも送電を継続できる高信頼度の直流系統構築技術を確立することを目的に，【実施内容1】直流系統の信頼度向上に向けた多重化方法の開発，および【実施内容2】直流系統故障に対する交直変換器の運転継続性能の向上について取り組んでいる。
    これまでの研究では，短期間での実用化を念頭に直流遮断器を用いない方式と，中長期的な実用化を目指し直流遮断器を用いた方式の２方式を対象に検討を実施した。直流遮断器を用いない方式については，平行二回線送電システムを対象としたスケールダウン構成の模擬直流系統設備を構成し，一回線故障時における発電設備の運転継続性能を実験で検証した。直流遮断器を用いた方式については，シミュレーションによる原理検証を行った。モジュラーマルチレベル変換器（ＭＭＣ）に対して直流電流制御を適用することにより，直流線路故障時に変換器を運転継続できることを確認した。今後は後者についても模擬直流系統設備を構築し，実験により有効性を検証する予定である。

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  • High-power dc-dc converter for electric vehicles and electric aircraft

    Grant number：19H02125  2019.4 - 2022.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)  Grant-in-Aid for Scientific Research (B)

    Hagiwara Makoto

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    Grant amount：\13910000 （ Direct Cost: \10700000 、 Indirect Cost：\3210000 ）

    This research outcome is expected to be applied to mobile bodies such as electric vehicles and electric aircrafts in the near future with a power rating of 100 kW. Attention is paid to large-capacity power electronics technology and a dc-dc converter that can realize small size, light weight, and low loss is proposed. The validity of the dc-dc converter is verified experimentally using a downscaled model and computer simulation using PSCAD, for contributing to the expansion of electrical vehicles and aircrafts, the improvement of the global environment, and the realization of a energy-saving society. It has been confirmed that the proposed dc-dc converter can achieve good steady and transient performance while achieving high efficiency and high power density.

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  • Study of a bulk power system based on multi-terminal HVDC transmission systems

    Grant number：18K04097  2018.4 - 2021.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)  Grant-in-Aid for Scientific Research (C)

    Sano Kenichiro

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    Grant amount：\4420000 （ Direct Cost: \3400000 、 Indirect Cost：\1020000 ）

    This study aims to establish a technology for constructing a bulk power transmission system using a multi-terminal HVDC transmission system. Our group has developed a multi-circuit HVDC transmission system using diodes as a configuration for achieving expandability and selective fault clearing of HVDC grids. Then, we have developed a low-cost protection method using a power converter and a fast disconnector for the HVDC grid. We have built a scale-down HVDC system, and the proposed methods were verified by experiments. The technology developed in this research will be effective for promoting grid interconnection by a bulk power transmission system using HVDC grids.

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  • 共振形スイッチトキャパシタコンバータを用いた電圧均一化回路

    Grant number：08J04482  2008 - 2010

    日本学術振興会  科学研究費助成事業 特別研究員奨励費  特別研究員奨励費

    佐野 憲一朗

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    Grant amount：\1200000 （ Direct Cost: \1200000 ）

    共振形スイッチトキャパシタコンバータ(RSCC)は,直流変換回路の一種であり,小型で高効率な電力変換を実現する。この回路の詳細な動作は解明されていないため,本研究では過渡特性の向上,連係動作時の特性評価,効率評価,設計法の確立等を行い,kW級の変換器への応用の検討を行っている。本年度は電圧レギュレータへの応用に関する下記の2点の検討を行った。
    A.出力電圧を変化させた場合の動作検証
    RSCCの出力電圧を規定値から変更して動作した際の動作検証を行なった。出力電圧を連続的に制御するための制御器の設計,電流の解析,回路に用いるインダクタの体積評価を行い,その特性を明らかにした。定格400V-3kWの変換回路を試作し,実験により動作検証を行った。従来から用いられている降圧チョッパ回路と比較し,入出力電圧比が0.2～0.8の範囲ではインダクタの体積を同等に,電圧比が0.45～0.54の範囲では10分の1に低減できることを確認した。また,ソフトスイッチングを実現する条件に関する解析を行った。
    B.RSCCの電力変換損失の解析と効率改善
    定格400V-3kWの変換回路を構成し,その損失の測定を行った。回路で発生する損失を低減するため,スイッチングデバイス,共振インダクタ,共振コンデンサのそれぞれについて,最適なデバイスの選定法を検討した。ソフトスイッチングを効果的に行うために駆動回路の検討を行った。これにより,99.7%という極めて高い電力変換効率を実現した。これは,現在学会にて発表されている共振形スイッチトキャパシタコンバータの中でも,最も高い変換効率である。

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