An Improved Forward-Flyback Grid-Connected Micro-Inverter
Wang Xingxing1, Ji Baojian1, Hong Feng2, Ye Zunjing1
1. College of Electrical Engineering and Control Science Nanjing TECH University Nanjing 211816 China; 2. College of Electronic and Information Engineering Nanjing University of Aeronautics & Astronautics Nanjing 210016 China
Abstract:The flyback grid-connected micro-inverter has larger current ripple and lower output power, while the interleaved flyback grid-connected micro-inverter needs many switching devices and complex control strategy. Therefore, a novel single-stage forward-flyback grid-connected micro- inverter with two transformers is proposed in this paper. The proposed inverter uses only two switches in the secondary side to simplify the control strategy and guarantee high reliability. The utilization of two transformers in the topology can split the power and reduce the size of single transformer. Detailed analyses on the topology of the proposed inverter, the current control strategy, steady principle and characteristics of the circuit are presented. In addition, the simulation results and experimental data verify the feasibility of the micro-inverter.
王星星, 嵇保健, 洪峰, 叶尊敬. 一种改进的正反激并网微型逆变器[J]. 电工技术学报, 2017, 32(18): 202-210.
Wang Xingxing, Ji Baojian, Hong Feng, Ye Zunjing. An Improved Forward-Flyback Grid-Connected Micro-Inverter. Transactions of China Electrotechnical Society, 2017, 32(18): 202-210.
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