High-Frequency Isolated Grid-Connected Inverter Based on Parallel Resonance
Piao Zhengguo1,2,3, Hu Yongjie1, Guo Yuqi1
1. Collaborative Innovation Center of Key Power Energy-Saving Technologies in Beijing North China University of Technology Beijing 100144 China; 2. Inverter Technologies Engineering Research Center of Beijing Beijing 100144 China; 3. Collaborative Innovation Center of Electric Vehicles in Beijing Beijing 100144 China
Abstract：Traditional DC-DC high-frequency isolated grid-connected inverter has the problems of high loss, voltage spike and low stability. A novel topology combining with parallel resonance and DC-DC converter was proposed. This novel topology can achieve zero voltage switching (ZVS) for the high-frequency switch, which reduces the loss of the inverter. The working principle and switch states are introduced in detail, then the resonant equivalent circuit model is built and its design principle of resonant parameters is given. To eliminate low harmonics generated by the dead-zone, the dead-time compensation is applied in the control system. Finally, a prototype is produced, and the experiments verify the correctness of the circuit topology and control strategy.
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2018, Vol. 33 
