三相准Z源并网逆变器的简单升压改进空间矢量调制策略

doi:10.19595/j.cnki.1000-6753.tces.161095

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Abstract This paper proposes a three-phase quasi-Z-source grid-connected inverter with strong boost ability and three kinds of simple boost modified space vector modulation (SVM) strategies. Two existing kinds of modified SVMs were used as the simple boost modulation. The characteristics of the inverter with five kinds of simple boost modified SVM strategies were deeply investigated and compared, including the switching losses of the inverter bridge and the impedance network diode, the loss of the energy storage inductor, the current ripples of the energy storage inductor and the filter inductor, and total harmonic distortion (THD) of output grid-connected current. It is concluded that the overall performance of the inverter is the best with the simple boost modified SVM that has four shoot-through segments between active vectors and traditional zero vectors. The quasi-Z-source grid-connected inverter is composed of a large boost ratio quasi-Z-source impedance network and a three-phase inverter. The simple boost modified SVM strategy has many advantages, such as fully utilizing zero vector action time, low switching loss and voltage stress, strong boost capability. The feasibility of the inverter and the correction of theory analysis were verified by the experiments. It lays a key technical foundation on new energy grid-connected power generation systems such as photovoltaic, wind.

Key words： Three-phase grid-connected inverter quasi-Z-source simple boost modified space vector modulation switching loss current ripple

Received: 12 July 2016 Published: 05 March 2018

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TM46

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	Qu Aiwen
	Chen Daolian
	Su Qian

Cite this article:

Qu Aiwen,Chen Daolian,Su Qian. Simple Boost Modified Space Vector Modulation Strategy for Three-Phase Quasi-Z-Source Grid-Connected Inverter[J]. Transactions of China Electrotechnical Society, 2018, 33(4): 826-836.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.161095 OR https://dgjsxb.ces-transaction.com/EN/Y2018/V33/I4/826

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