标题：A Closed-loop GSPWM Method for Attenuating Circulating Leakage Current in PV Station
作者：Xu, Tao ;Gao, Feng ;Hao, Tianqu ;Zhou, Kangjia
作者机构：[Xu, Tao ;Gao, Feng ;Hao, Tianqu ;Zhou, Kangjia ] Shandong University, Jinan, China
会议名称：10th International Conference on Power Electronics - ECCE Asia, ICPE 2019 - ECCE Asia
会议日期：May 27, 2019 - May 30, 2019
来源：ICPE 2019 - ECCE Asia - 10th International Conference on Power Electronics - ECCE Asia
摘要：This paper proposes a closed-loop Global Synchronous Pulse Width Modulation (CL-GSPWM) method for attenuating circulating leakage current in PV station with many inverters connected in parallel. The CL-GSPWM can well minimize leakage current without central calculation and the pre-known parameters of each inverter, such as leakage capacitors, feeder impedance, etc.. Each inverter can control its PWM phase shift angle to minimize the leakage current with the measured leakage current. Meanwhile, it only needs to transmit little information among inverters, which means the proposed method can be integrated into inverter without additional hardware. Experimental prototype with four down-scale inverters are employed to verify the performance of the proposed CL-GSPWM.
© 2019 The Korean Institute of Power Electronics (KIPE).