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Title
Japanese:バランス回路を接続した低圧系統連系変換器向けモジュラー・マルチレベル変換器の損失低減 
English:Loss Reduction of Modular Multilevel Converter with Balancing Circuit for Low-Voltage Grid Converter 
Author
Japanese: 新井卓郎, 関口慧, 餅川宏, 佐野憲一朗, 藤田英明.  
English: Takuro Arai, Kei Sekiguchi, Hiroshi Mochikawa, Kenichiro Sano, Hideaki Fujita.  
Language Japanese 
Journal/Book name
Japanese:電気学会論文誌Ｄ（産業応用部門誌） 
English:IEEJ Transactions on Industry Applications 
Volume, Number, Page vol. 141    no. 6    pp. 461-471
Published date June 1, 2021 
Publisher
Japanese:一般社団法人 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/141/6/141_461/_article/-char/ja
 
DOI https://doi.org/10.1541/ieejias.141.461
Abstract This study proposes a modular multilevel converter by applying a balancing circuit with a resistor for a low-voltage grid converter. The proposed balancing circuit, which is controlled by the same gate signal as that of the main switch, can reduce the loss of the additional balancing circuit and the current rating of the balance switch without the need for additional the cell capacitors. Only one voltage sensor per converter arm is required to automatically balance the cell capacitor voltages. The experimental results indicate that the cell capacitor voltages are well balanced during a rated operation of 10kW and a high efficiency of up to 99.2% is achieved, which is almost the same as that without a balancing circuit.

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