一种新型高效无变压器型单相光伏逆变器

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Abstract Single-phase transformerless inverter is widely used in low-power photovoltaic(PV) grid-connected systems due to its small size, high efficiency and low cost. This paper proposes a new topology for transformerless systems, which does not generate common-mode currents, and topologically guarantees that no DC is injected into the grid. In the same condition, the output current ripple of the proposed topology is half that of half bridge inverter, and it almost has the same current ripple level as three-level diode clamped inverter. At the same time, the efficiency of the proposed topology is higher than half bridge inverter, closely to three-level diode clamped inverter. The proposed topology was verified in a prototype.

Key words： Photovoltaic(PV) system transformerless inverter three-level diode clamped inverter half-bridge inverter common-mode current DC component current ripple

Received: 08 October 2013 Published: 25 May 2015

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TM464

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	Articles by authors
	Yang Xiaoguang
	Jiang Longbin
	Feng Junbo
	Wang Youhua

Cite this article:

Yang Xiaoguang,Jiang Longbin,Feng Junbo等. A New High Efficiency Transformerless Single-Phase Photovoltaic Inverter[J]. Transactions of China Electrotechnical Society, 2015, 30(8): 97-103.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2015/V30/I8/97

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