一种H桥级联型PWM整流器的直流母线电压平衡控制新方法

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Abstract DC-link voltages balancing is very important for cascaded H-bridge rectifier (CHBR). A new control method for voltages balancing is proposed in this paper. The relationship between the modulation index increment and the output voltage error is deduced. Therefore the modulation indexes of the cells are rearranged according to the measured dc voltages and the DC voltages are regulated to be the same value. The implement method for the proposed strategy is discussed in detail and the final method is derived. Simulations and experiments were carried out with the presented method. All of them approve that the proposed method is effective for such cascaded topology. The good performance is achieved when the CHBR is operating on the different conditions.

Key words： High power converter voltage balance method cascaded topology

Received: 22 June 2010 Published: 07 March 2014

PACS:

TM464

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	Articles by authors
	Tao Xinghua
	Li Yongdong
	Sun Min

Cite this article:

Tao Xinghua,Li Yongdong,Sun Min. A Novel DC-Link Voltages Balancing Control Method for Cascaded H-Bridge Rectifier[J]. Transactions of China Electrotechnical Society, 2011, 26(8): 85-90.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2011/V26/I8/85

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