混合导通模式三相三电平VIENNA 整流器控制策略

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Abstract In this paper, three-phase three-level VIENNA rectifier is decoupled in topology. By analyzing of single-phase three-level rectifier operating in continuous and discontinuous conduction mode, an improved control method based on feedforward is proposed to achieve unit power factor(PF) and reduce the harmonic of the input current in mixed conduction mode(MCM). The problem of parameters conflicted in different modes is solved by adding the desired duty ratio to the output of original current-loop. So the improved current-loop could automatically switch between continuous and discontinuous conduction mode. Finally, an experimental prototype of 5kW is built to verify the feasibility of this strategy. The PF value is close to unity at full load when the converter operates at MCM and the total harmonic distortion of input-current(THD_i) is significantly reduced.

Key words： Three-level rectifier decoupling in topology mixed conduction mode(MCM) power factor correction(PFC) duty-ratio-feedforward

Received: 23 March 2011 Published: 20 March 2014

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TM461

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	Articles by authors
	Yan Gang
	Yao Wenxi
	Li Bin
	Hang Lijun
	Lu Zhengyu

Cite this article:

Yan Gang,Yao Wenxi,Li Bin等. Control Strategy of Three-Phase Three-Level VIENNA Rectifier Operating in Mixed Conduction Mode[J]. Transactions of China Electrotechnical Society, 2012, 27(12): 87-93.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2012/V27/I12/87

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