Research on a single phase high frequency photovoltaic grid-connected inverter

被引：0

作者：

Li, Anqing ^{[1
]}

Wu, Chunhua ^{[1
]}

Li, Zhihua ^{[1
]}

Dong, Huaman ^{[1
]}

机构：

[1] Shanghai University School of Mechatronics Engineering and Automation, Shanghai University, Shanghai,200072, China

来源：

Taiyangneng Xuebao/Acta Energiae Solaris Sinica | 2020年 / 41卷 / 06期

关键词：

Diodes - Leakage currents - Schottky barrier diodes - Silicon carbide - Efficiency - Electric inverters - Silicon;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

To avoid adding dead time to the short through exists in conventional full-bridge, half-bridge circuit topologies and the problems of circuit switching losses increasing due to poor performance of the body freewheeling diode. In this paper, a single-phase bridge dual inductor photovoltaic inverter was studied. There is only one diode and switch in one arm,without arm through and dead time. The topology can effectively suppress the common mode current, solving the leakage current problem of the non-isolated inverter when adopting the unipolar SPWM modulation method. The multi-resonant control algorithm is used to suppress the low harmonics and improve the quality of the grid-connected current. At the same time, the switching loss caused by the recovery time of the freewheeling diode is solved by the using of SiC Schottky diode; therefore this inverter can have a high conversion efficiency under 100 kHz switching frequency, with the inverter power density improved. A prototype of 500 W was designed and manufactured. Simulation and experimental results show that the topology has the characteristics of high frequency and high leakage current suppression. © 2020, Solar Energy Periodical Office Co., Ltd. All right reserved.

引用

页码：247 / 255