Improving Robustness against Disturbances in Next Generation Power Supply Systems with Delayed Feedback Control

2022 Fiscal Year Final Research Report

• Project/Area Number: 21K21324
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Multi-year Fund
• Review Section: 1002:Human informatics, applied informatics and related fields
• Research Institution: National Institute of Technology, Toyama College
• Principal Investigator: Yoshida Koki 富山高等専門学校, その他部局等, 助教 (30910442)
• Project Period (FY): 2021-08-30 – 2023-03-31
• Keywords: 直流給電 / ネットワーク / 遅延フィードバック / 非線形 / 引き込み領域

Outline of Final Research Achievements

The "DC microgrid" that efficiently distributes DC power to loads from multiple small-scale power sources is attracting attention as the next-generation power supply system. Attempts are being made to improve the robustness of DC microgrids against disturbances such as load additions or removals using control methods and bifurcation analysis. However, the existing methods could only be applied to small-scale systems consisting of a few power sources and loads, and they were unable to handle the future expansion of power supply networks in society. Therefore, this study proposed approaches to approximate large-scale power supply systems to small-scale systems, enabling system analysis.

Free Research Field

非線形科学，制御工学

Academic Significance and Societal Importance of the Research Achievements

制御工学の分野では信号の遅れ，すなわち「遅延」はシステムのパフォーマンスを低下させる要因として認識されてきた．一方で，非線形科学の分野では，遅延をうまく活用することで，システムの安定化が可能であることが知られている．さらに，この遅延を活用した手法を，次世代の電力システムである「直流給電システム」の安定化へと応用する試みが注目されている．本研究では，この手法を大規模な給電ネットワークへと拡張することに取り組んだ．本成果は，再生可能エネルギーを利用した発電設備のさらなる普及や，負荷の需要変動に強い電力システムの実現に貢献する．