基于Z源电容电压变化的并网电流控制策略

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Abstract Z-source inverter is a single-stage system. It has some advantages such as simple structure, high reliability of the inverter for avoiding influence of the shoot-through by EMI, and small output waveform distortion. Especially, this topology applies to the occasions of large rang input voltage such as PV power generation, etc. In PV grid-connected system, the frequent change of output current will bring the negative impact on the power quality. This paper proposes the Z-source capacitor voltage-change adjustment method to control ac line current amplitude, combined with the characteristics of single-phase Z-source PV grid-connected inverter. The proposed method can improve the power quality of the grid and minimize the injected ac line current variation. The experimental results verify the validity of the proposed control strategy.

Key words： Photovoltaic power generation grid-connected inverter grid current regulation Z-source

Received: 08 October 2010 Published: 07 March 2014

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TM46

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	Articles by authors
	Liu Hongpeng
	Wang Wei
	Wu Hui
	Xu Dianguo

Cite this article:

Liu Hongpeng,Wang Wei,Wu Hui等. Grid Current Control Strategy Based on Z-Source Capacitor Voltage Change[J]. Transactions of China Electrotechnical Society, 2011, 26(7): 97-103.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2011/V26/I7/97

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