高速な還流モード切り替えを適用した小型連系インダクタを有する単相系統連系インバータのFRT制御

カテゴリ: 論文誌(論文単位)

グループ名: 【D】産業応用部門

発行日: 2020/01/01

タイトル(英語): FRT Capability of Single-phase Grid-tied Inverter with Minimized Interconnected Inductor Applying High-speed Switching to Freewheel Mode

著者名: 永井　悟司（長岡技術科学大学），日下　佳祐（長岡技術科学大学），伊東　淳一（長岡技術科学大学）

著者名(英語): Satoshi Nagai (Nagaoka University of Technology), Keisuke Kusaka (Nagaoka University of Technology), Jun-ichi Itoh (Nagaoka University of Technology)

キーワード: 系統連系インバータ，連系インダクタ，FRT，高速還流モード　　grid-tied inverter，interconnected inductor，FRT，high-speed freewheel mode

要約(英語): This paper proposes a fault ride-through (FRT) operation for a single-phase grid-tied inverter with a minimized inductor in order to reduce the inverter output current overshoot. The inverter output current overshoot becomes very high at a grid voltage drop and recovery, when a low-inductance interconnected inductor is used. Hence, a grid-voltage fault stops the operation of the grid-tied inverter due to overcurrent protection. This paper proposes a high-speed freewheel mode during the voltage sag in order to reduce the inductor current overshoot. Moreover, the inductance of the interconnected inductor is designed by considering the grid voltage recovery operation of the inverter with the high-speed freewheel mode. Consequently, by using the proposed method, the grid-tied inverter continues to operate without interruption during the grid voltage fault. With the proposed method, the maximum inductor current overshoot during the voltage sag is reduced from 755% to 141%, compared with the conventional FRT operation.

本誌: 電気学会論文誌D（産業応用部門誌） Vol.140 No.1 （2020）

本誌掲載ページ: 2023/01/14 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/ieejias/140/1/140_1/_article/-char/ja/