A New High Efficiency Transformerless Single-Phase Photovoltaic Inverter
Yang Xiaoguang, Jiang Longbin, Feng Junbo, Wang Youhua
Province-Ministry Joint Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability Hebei University of Technology Tianjin 300130 China
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.
杨晓光, 姜龙斌, 冯俊博, 汪友华. 一种新型高效无变压器型单相光伏逆变器[J]. 电工技术学报, 2015, 30(8): 97-103.
Yang Xiaoguang, Jiang Longbin, Feng Junbo, Wang Youhua. A New High Efficiency Transformerless Single-Phase Photovoltaic Inverter. Transactions of China Electrotechnical Society, 2015, 30(8): 97-103.
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