電流制御型インバータに付加した制御機能が不安定化する原理と対策技術の開発

カテゴリ: 論文誌(論文単位)

グループ名: 【B】電力・エネルギー部門

発行日: 2022/05/01

タイトル(英語): Mechanism of Control Instability of Control Function Installed to Grid-following Inverter and Development of Damping Controller for Stable Operation

著者名: 白崎　圭亮（（一財）電力中央研究所），天野　博之（（一財）電力中央研究所）

著者名(英語): Keisuke Shirasaki (Central Research Institute of Electric Power Industry), Hiroyuki Amano (Central Research Institute of Electric Power Industry)

キーワード: 電流制御型インバータ，動的無効電流制御，短絡容量比，系統の強さ，小信号安定性_x000D_　　grid-following inverter，dynamic reactive current control，short circuit ratio，system strength，small-signal stability

要約(英語): Conventional synchronous generators have been replaced by renewable energy source such as photovoltaics generation and wind turbine generation interconnected through inverters. As the capacity of synchronous generators interconnected to the power system decrease, the power system stability can be gradually jeopardized. Therefore, these inverters may be required to have some control functions in grid-interconnection code to support power system stabilization. On the other hand, it is known that the response of some control functions become unstable and undesired oscillatory behavior appears depending on the power system conditions such as low short circuit ratio. In consequence, not only the expected power system stabilization is not obtained, but also the power quality may be degraded. In this paper, the mechanism of these instabilities is clarified by using a simplified root mean square model, and a damping controller applicable to grid-following (GFL) inverter is developed. It is shown that the damping of the oscillatory behavior could be improved by applying the proposed controller using eigenvalue analysis and time domain simulation. This contribution is useful for the appropriate operation of the control function installed to GFL inverter.

本誌: 電気学会論文誌B（電力・エネルギー部門誌） Vol.142 No.5 （2022）

本誌掲載ページ: 243-254 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/ieejpes/142/5/142_243/_article/-char/ja/