引用本文:姚芳,陆乐,王刘浏,李超峰,唐圣学.基于输入电流和输出电压的Vienna整流器单管开路故障诊断方法[J].电力自动化设备,2022,42(3):
YAO Fang,LU Le,WANG Liuliu,LI Chaofeng,TANG Shengxue.Method of single switch open circuit fault diagnosis in Vienna rectifier based on input currents and output voltage[J].Electric Power Automation Equipment,2022,42(3):
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基于输入电流和输出电压的Vienna整流器单管开路故障诊断方法
姚芳1,2, 陆乐1,2, 王刘浏3, 李超峰1,2,4, 唐圣学1,2
1.河北工业大学 电气工程学院 省部共建电工装备可靠性与智能化国家重点实验室,天津 300130;2.河北工业大学 电气工程学院 河北省电磁场与电器可靠性重点实验室,天津 300130;3.中国长江电力股份有限公司,湖北 宜昌 443002;4.河北工业大学电气工程学院河北省电磁场与电器可靠性重点实验室,天津300130
摘要:
单管开路故障是Vienna整流器的常见故障形式,为提高单管开路故障诊断的准确性和可靠性,基于输入电流和输出电压提出了一种故障诊断方法。首先,分析单管开路故障时的故障机理,选取故障时输入电流和输出电压作为故障特征量;然后,通过检测输入电流的零值稳区和分析输出电容电压差的谐波变化,设计故障诊断方法;最后,通过仿真和实验验证了所提方法的有效性。所提出的方法结合电流、电压故障特性,在快速诊断的同时大幅提高了诊断结果的准确性和可靠性,在负载突变的情况下仍能正确工作,并且不需要添加额外的硬件设备,方便嵌入已有的控制系统中,能够实现单管开路故障的快速在线诊断。
关键词:  单管开路故障  Vienna整流器  零值稳区  谐波特性  在线诊断
DOI:10.16081/j.epae.202201007
分类号:TM46
基金项目:河北省自然科学基金资助项目(E2019202481, E2017202284);河北省自然科学基金创新研究群体项目(E2020202142)
Method of single switch open circuit fault diagnosis in Vienna rectifier based on input currents and output voltage
YAO Fang,LU Le,WANG Liuliu,LI Chaofeng,TANG Shengxue
1.State Key Laboratory of Reliability and Intelligence of Electrical Equipment, School of Electrical Engineering, Hebei University of Technology, Tianjin 300130, China;2.Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability of Hebei Province, School of Electrical Engineering, Hebei University of Technology, Tianjin 300130, China;3.China Yangtze Power Co.,Ltd.,Yichang 443002, China
Abstract:
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.
Key words:  single switch open circuit fault  Vienna rectifier  zero-plateau  harmonic characteristics  online diagnosis

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