基于改进谱峭度与电流均值的牵引整流器开路故障诊断方法  

Open circuit fault diagnosis method for traction rectifier based on improved spectral kurtosis and current mean value

作　　者：王英 王丹 陈小强 曹丽 高锋阳 王庚 王妮 WANG Ying;WANG Dan;CHEN Xiaoqiang;CAO Li;GAO Fengyang;WANG Geng;WANG Ni(Gansu Provincial Rail Transit Electrical Automation Engineering Laboratory,School of Electrical and Automation Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;State Grid Jiayuguan Jiuquan Power Supply Company,Jiayuguan 735100,China;State Grid Baiyin Power Supply Company,Baiyin 730900,China)

机构地区：[1]兰州交通大学自动化与电气工程学院甘肃省轨道交通电气自动化工程实验室,甘肃兰州730070 [2]国网嘉峪关酒泉供电公司,甘肃嘉峪关735100 [3]国网白银供电公司,甘肃白银730900

出　　处：《电力自动化设备》2020年第1期112-118,共7页Electric Power Automation Equipment

基　　金：国家重点研发计划项目(2017YFB1201003-020);国家自然科学基金资助项目(51767013);中国铁路总公司科技研究开发计划重点课题(2017J012-A);甘肃省教育厅自然科学基金资助项目(2017A-020);甘肃省科技厅自然科学基金资助项目(18JR3RA111)~~

摘　　要：针对动车组牵引整流器IGBT的开路故障诊断问题,以CRH3型动车组的牵引工况为例,提出一种基于改进谱峭度与电流均值的新型诊断方法。分析单个IGBT开路和2个IGBT同时开路故障下牵引整流器的网侧电流突变情况,根据网侧电流的突变特征将其分类;计算网侧电流的改进谱峭度(SK)以检测故障发生类别;结合电流均值法定位故障。所提的改进方法不需要复杂分类器,在实际应用中方便可行,仿真结果表明该方法能有效实现动车组牵引整流器的故障诊断。To deal with the open circuit fault diagnosis of the EMU(Electric Multiple Unit)traction rectifier IGBT,a new diagnostic method based on improved spectral kurtosis and current mean value is proposed.The traction condition of CRH3 EMU is utilized as an example.Firstly,the sudden mutation of the traction rectifier network side current is analyzed under both single IGBT open circuit and two IGBTs open circuit faults.The fault is classified according to the mutation characteristics of the network side current.Subsequently,the improved SK(Spectral Kurtosis)of the network side current is calculated to detect the fault category.Finally,the fault can be located in combination with the current mean value method.The improved method does not require complex classifiers,and it is convenient and feasible in practical applications.The simulative results show that the proposed method can effectively solve the fault diagnosis of EMU traction rectifier.

关 键 词：牵引整流器 IGBT 故障诊断 改进谱峭度 电流均值 

分 类 号：TM461[电气工程—电器]