Influence of the Overlap Time on the AC Grid Current of CSR and its Restraining Method

被引：0
|
作者：
Qin, Haihong [1 ]
Liu, Qing [1 ]
Zhang, Xin [1 ]
Fu, Dafeng [1 ]
Zhao, Chaohui [2 ]
机构：
[1] Nanjing Univ Aeronaut & Astronaut, Ctr More Elect Aircraft Power Syst, Nanjing, Jiangsu, Peoples R China
[2] Shanghai DianJi Univ, Coll Elect Engn, Shanghai, Peoples R China
来源：
IECON 2017 - 43RD ANNUAL CONFERENCE OF THE IEEE INDUSTRIAL ELECTRONICS SOCIETY | 2017年
基金：
中国国家自然科学基金;
关键词：
Current source rectifier; overlap time; grid current; overlap current harmonics restraining method; TOPOLOGIES;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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 results in the extra harmonic in grid current. Waveforms of AC side current before and after added overlap time are achieved from analysis of the current commutation process. The expression of overlap current is given according to the pulse equivalent principle and the quantitative relationship between the extra harmonic of AC side current and overlap time is also given on the basis of the Fourier analysis. In addition, a method of restraining the overlap current is proposed. Finally, simulation and experiment results demonstrate the effectiveness of the proposed analysis and restraining method.
引用
收藏
页码：1249 / 1254
页数：6
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