抵消恒功率负载负阻抗特性影响的双向Buck/Boost变换器控制策略

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Abstract In this paper, the stability of bi-directional Buck/Boost converter with constant power load (CPL) is studied. A novel power feed forward control scheme for the bi-directional Buck/Boost is presented. The mechanism of negative impedance of CPL degenerating bus voltage stability is analyzed and a control scheme can counteract negative impedance with feed-forward term which reflectes the changing trends of DC bus voltage is proposed. Small-signal model analysis and simulation and experimental results demonstrate that the proposed control scheme can counteract the impedance negative of CPL effectively and improve the drive system stability range.

Key words： Buck/Boost bi-directional converter motor drive system constant power load negative impedance characteristics DC-bus voltage stability

Received: 09 February 2012 Published: 26 March 2014

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TM46

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	Zhang Xuhui
	Wen Xuhui
	Zhao Feng

Cite this article:

Zhang Xuhui,Wen Xuhui,Zhao Feng. The Control Scheme Counteracting Negative Impedance of Constant Power Load for Bi-Directional Buck/Boost[J]. Transactions of China Electrotechnical Society, 2013, 28(11): 195-201.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2013/V28/I11/195

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