A Power Balancing Control for Large Power Unbalance in a Modular Multilevel Multiport Converter with Phase-Disposition PWM
A Power Balancing Control for Large Power Unbalance in a Modular Multilevel Multiport Converter with Phase-Disposition PWM
カテゴリ: 論文誌(論文単位)
グループ名: 【D】産業応用部門(英文)
発行日: 2024/01/01
タイトル(英語): A Power Balancing Control for Large Power Unbalance in a Modular Multilevel Multiport Converter with Phase-Disposition PWM
著者名: Takumi Yasuda (Nagaoka University of Technology), Jun-ichi Itoh (Nagaoka University of Technology)
著者名(英語): Takumi Yasuda (Nagaoka University of Technology), Jun-ichi Itoh (Nagaoka University of Technology)
キーワード: multiport converter,modular multilevel converter,intra-arm balancing controller,phase-disposition PWM
要約(英語): A large-scale multiport converter based on the modular multilevel converter (MMC) architecture for charging electric vehicles (EVs) can reduce the volume and installation costs compared to those of conventional multiport converters. It has been pointed out that the multiport converter requires additional circulating current (intra-arm balancing current) to ensure both a balanced grid current and power distribution to the cells under large power unbalance among the cells in one arm. However, a control strategy of the intra-arm balancing current has not been discussed enough in the past. This paper proposes an online minimization control of the intra-arm balancing current. The proposed controller minimizes the intra-arm balancing current with capacitor voltage feedback and a PI controller. In addition, an adaptive observer is installed to adjust the controller gain, which realizes a fast response and stability under all loaded conditions. Experimental results verify that the proposed controller ensures a grid current with low total harmonic distortion of 3.1% and capacitor voltage balancing with minimum intra-arm balancing current exhibiting an error of 4.5% from the theoretical value under the largest power unbalance of 1p.u. among the cells.
本誌: IEEJ Journal of Industry Applications Vol.13 No.1 (2024)
本誌掲載ページ: 41-51 p
原稿種別: 論文/英語
電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejjia/13/1/13_23003191/_article/-char/ja/
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