一种基于矢量空间解耦的三电平六相逆变器空间矢量调制策略

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Abstract This paper presents a novel space vector modulation (SVM) strategy based on vector space decomposition (VSD) for neutral point clamped (NPC) three-level six-phase inverter,which could be used in medium-voltage high-power AC electric drives.The principle is given as follows.The six-dimensional variables are decoupled and mapped into three two-dimensional spaces,namely the α-β space,the x-y space and the o1-o2 space.A vector simplified principle is proposed to reduce the number of the original vector from 729 to 417.Then the optimal five vectors (OFV) technique is designed to eliminate harmonic voltage in the x-y space.Meanwhile,the method of the region projection is proposed to improve thejudgment efficiency of the voltage reference vector in the complex region.The optimal vector operational order,by using the redundant negative vector as the first operation vector,balances the neutral point voltage effectively.Finally,the experimental resultsare given to verify the above mentioned theoretical developments.

Key words： Vector space decomposition (VSD) neutral point clamped (NPC) three-level six-phase optimal five vectors (OFV) space vector modulation

Received: 11 March 2015 Published: 07 July 2016

PACS:	TM464
	TM301.2

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	Chen Jian
	Wang Zheng
	Cheng Ming

Cite this article:

Chen Jian,Wang Zheng,Cheng Ming. Design of a Space Vector Modulation Strategy Based on Vector Space Decomposition for Three-Level Six-Phase Inverters[J]. Transactions of China Electrotechnical Society, 2016, 31(9): 101-111.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2016/V31/I9/101

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