Method of single switch open circuit fault diagnosis in Vienna rectifier based on input currents and output voltage

被引：0
|
作者：
Yao F. [1 ,2 ]
Lu L. [1 ,2 ]
Wang L. [3 ]
Li C. [1 ,2 ]
Tang S. [1 ,2 ]
机构：
[1] State Key Laboratory of Reliability and Intelligence of Electrical Equipment, School of Electrical Engineering, Hebei University of Technology, Tianjin
[2] Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability of Hebei Province, School of Electrical Engineering, Hebei University of Technology, Tianjin
[3] China Yangtze Power Co., Ltd., Yichang
来源：
Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2022年 / 42卷 / 03期
关键词：
Harmonic characteristics; Online diagnosis; Single switch open circuit fault; Vienna rectifier; Zero-plateau;
D O I：
10.16081/j.epae.202201007
中图分类号：
学科分类号：
摘要：
The single switch open circuit fault is a common fault form of Vienna rectifiers. In order to improve the accuracy and reliability of single switch open circuit fault diagnosis, a diagnosis method based on the input currents and the output voltage is proposed. Firstly, the failure mechanism of the single switch open circuit fault is analyzed, and the input currents and the output voltage are selected as the fault characteristics. Then, the fault diagnosis method is designed by detecting the zero-plateau of the input currents and analyzing the harmonic changes of the output capacitor voltage difference. Finally, the effectiveness of the proposed method is verified by simulation and experiment. The proposed method combines the characteristics of current and voltage faults, which greatly increases the accuracy and reliability of the diagnosis results while fast diagnosis. It can still work correctly under sudden load changes. It does not need to add additional hardware equipment, so it is easy to be embedded into the existing control system and can realize the fast online fault diagnosis for the single switch open circuit fault. © 2022, Electric Power Automation Equipment Press. All right reserved.
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页码：82 / 89
页数：7
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