Open circuit fault diagnosis of dual three-phase voltage source inverter based on wavelet analysis

被引：0
|
作者：
Zhou C.-Y. [1 ]
Shen Y.-X. [1 ]
机构：
[1] College of Internet of Things Engineering, Jiangnan University, Wuxi
来源：
Dianji yu Kongzhi Xuebao/Electric Machines and Control | 2020年 / 24卷 / 09期
关键词：
Energy spectrum; Grid connected inverter; Open-circuit fault; Power spectrum; Series dual three-phase voltage inverter; Wavelet packet; Wind power generation system;
D O I：
10.15938/j.emc.2020.09.008
中图分类号：
学科分类号：
摘要：
Aiming at the small difference in fault output voltage waveforms of series dual three-phase voltage source inverters using in wind power generation system, a fault identification method of inverters based on wavelet packet analysis was proposed. Firstly, the reason of using series double three-phase voltage source inverters as grid-connected inverters was expounded and the output voltage signals of the inverters under various open-circuit faults of IGBT switching elements were obtained. Then the output voltage signals were decomposed by wavelet packet. Finally, the output voltage's signal after decomposition was analyzed by power spectrum method. The details of voltage signal are identified by spectrum characteristics, which solves the problem of fault detection caused by double three-phase voltage source inverters. The purpose of identifying various faults of series two-phase three-phase inverters by power spectrum was realized. The simulation experiment proves that this method has the advantages of high fault-tolerant performance. © 2020, Harbin University of Science and Technology Publication. All right reserved.
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页码：65 / 75and94
页数：7529
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