Abstract：To avoid large overvoltage when the current of the dc-link inductor is interrupted, overlap time is added to the drive signals in current source converters, which will bring the extra harmonics in grid current. Waveforms of AC side current before and after the added overlap time are achieved from the analysis of the current commutation process. The expression of overlap current is given. Moreover, according to the pulse equivalent principle, the quantitative relationship between the extra harmonic of AC side current and overlap time is also illustrated on the basis of Fourier analysis. In addition, a method of restraining the overlap current is proposed. Finally, simulation and experimental results demonstrate the effectiveness of the proposed analysis and restraining method.
秦海鸿, 张, 鑫, 朱梓悦, 马策宇, 徐华娟. 电流型PWM整流器叠流时间对网侧电流影响及其抑制方法[J]. 电工技术学报, 2016, 31(12): 142-152.
Qin Haihong, Zhang Xin, Zhu Ziyue, Ma Ceyu, Xu Huajuan. Influence of Overlap Time on the AC Grid Current of Current Source PWM Rectifier and Restraining Method. Transactions of China Electrotechnical Society, 2016, 31(12): 142-152.
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2016, Vol. 31 
