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Title
Japanese:スター結線を有するモジュラー・マルチレベル・カスケード変換器（MMCC-xSBC）のパワーフロー解析とコンデンサ電圧制御 
English:Generalized Power-flow Analysis and DC Capacitor-Voltage Control of the Modular Multilevel Cascade Converters Based on Star Configuration (MMCC-xSBC) 
Author
Japanese: 川村 弥, 萩原 誠, 赤木 泰文.  
English: Wataru Kawamura, Makoto Hagiwara, Hirofumi Akagi.  
Language Japanese 
Journal/Book name
Japanese:電気学会論文誌Ｄ（産業応用部門誌） 
English: 
Volume, Number, Page Vol. 135    No. 7    pp. 775-786
Published date July 1, 2015 
Publisher
Japanese:電気学会 
English:The Institute of Electrical Engineers of Japan 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
Official URL https://www.jstage.jst.go.jp/article/ieejias/135/7/135_775/_article/references/-char/ja/
 
DOI https://doi.org/10.1541/ieejias.135.775
Abstract The modular multilevel cascade converter (MMCC) family has been attracting attention from power electronics and power system engineers because it has been showing considerable promise as one of the next-generation high-power high-voltage/medium-voltage power converters. This paper provides an intensive discussion on power-flow analysis of three MMCC members with star configuration, focusing on dc-mean-voltage balance/regulation and ac-voltage mitigation control of all the floating dc capacitors. Most existing analysis methods are based on single-phase circuits, which make it difficult to derive capacitor voltage regulation/mitigation methods relying only on circulating currents and zero-sequence voltage. The power-flow analysis and regulation/mitigation methods developed in this paper are characterized by applying the αβ0 coordinate transformation(s). The validity of the power analysis and the regulation/mitigation method is confirmed by simulation using the PSCAD/EMTDC software package.

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