フィードフォワード制御による三相系統連系インバータシステムの受動性に基づく安定化法

カテゴリ: 論文誌(論文単位)

グループ名: 【C】電子・情報・システム部門

発行日: 2020/11/01

タイトル(英語): Passivity-Based Stabilization of a Grid-Connected Three-Phase Inverter System with Feedforward Control

著者名: 加藤　利次（同志社大学 理工学部 電気工学科），井上　馨（同志社大学 理工学部 電気工学科），山本　悠暉（同志社大学 理工学部 電気工学科），与村　和希（同志社大学 理工学部 電気工学科）

著者名(英語): Toshiji Kato (Department of Electrical Engineering, Doshisha University), Kaoru Inoue (Department of Electrical Engineering, Doshisha University), Yuki Yamamoto (Department of Electrical Engineering, Doshisha University), Kazuki Yomura (Department of Electrical Engineering, Doshisha University)

キーワード: 系統連系インバータ，受動性に基づく制御，安定化，フィードフォワード制御，最適制御，ディジタル制御　　grid-connected inverter，passivity-based control，stabilization，feedforward control，optimal control，digital control

要約(英語): Instabilities due to mutual interactions among inverters and grid systems are sometimes observed. This paper proposes an optimal digital controller design method for passive stabilization of a grid-connected three-phase inverter with LCL filter to improve output frequency impedance characteristics which sufficiently satisfy the Nyquist stability criterion. The principle is that the output impedance can be designed to be passive with the designed feedforward loop characteristics and the system is assured to be stable even if the grid system is weak. The proposed three-phase control consists of the following three steps. In the first step, the state feedback control gains for a single-phase control subsystem are designed to have a good sinusoidal tracking characteristic according to the optimal control. The designed characteristic of the output impedance may not be passive at a certain frequency band. In the second step, a resistive characteristic is added to the band by a new feedforward control design based on a fitting method to make the total characteristic passive and to ensure stability. In the third step, combining two sets of the designed single-phase control subsystems, a three-phase control system is derived. The principle and the design process are described and the designed system is investigated and validated for stability and response characteristics through simulation and experimental results.

本誌: 電気学会論文誌C（電子・情報・システム部門誌） Vol.140 No.11 （2020） 特集：電気関係学会関西連合大会

本誌掲載ページ: 1189-1197 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejeiss/140/11/140_1189/_article/-char/ja/