基于两种NN的CRH3动车组辅助逆变器故障诊断  

Fault Diagnosis of Auxiliary Inverter for CRH3 EMU Based on BP and GRNN

作　　者：孟建军[1,2,3] 徐妍琰 李德仓 王鑫健 MENG Jian-jun;XU Yan-yan;LI De-cangg;WANG Xin-jiang(Mechatronics T&R Institute,Lanzhou Jiaotong University,Lanzhou Gansu730070,China;Gansu Provincial Engineering Technology Center for Informatization of Logistics&Transport Equipment,Lanzhou Gansu730070,China;Gansu Provincial Industry Technology Center of Logistics&Transport Equipment,Lanzhou Gansu 730070,China;Shanghai EMU Depot of Shanghai Railway Administration,Shanghai 201200,China)

机构地区：[1]兰州交通大学机电技术研究所,甘肃兰州730070 [2]甘肃省物流及运输装备信息化工程技术研究中心,甘肃兰州730070 [3]甘肃省物流与运输装备行业技术中心,甘肃兰州730070 [4]上海铁路局上海动车段,上海201200

出　　处：《计算机仿真》2023年第4期153-159,共7页Computer Simulation

基　　金：国家自然科学基金资助项目(72061021,62063013);甘肃省高等学校科研项目(2017D-09,2018C-10);甘肃省科技计划资助项目(20JR10RA251)。

摘　　要：针对CRH3型动车组辅助逆变器故障特征向量与故障类型之间呈现的是非线性联系的特点,提出一种BP和GRNN算法的辅助逆变器故障诊断方法。在MATLAB/SIMULINK环境下搭建辅助逆变器仿真模型,对辅助逆变器中IGBT开路故障进行仿真,得到不同故障情况下输出电流波形;采用db3小波对电流输出波形进行分解重构,提取能量值和波形比例系数作为故障诊断的特征向量;采用BP和GRNN神经网络算法进行故障识别,分别建立BP神经网络和GRNN故障诊断模型并完成测试。测试结果可提高辅助逆变器故障诊断的效率及精确度,减少因过度维修导致的成本浪费,为动车组检修降本增效提供帮助。Aiming at the non-linear relationship between the fault feature vector and the fault type of the auxiliary inverter of the CRH3 EMU,a fault diagnosis method of the auxiliary inverter based on the BP and GRNN algorithm is proposed.The simulation model of the auxiliary inverter wa built in the MATLAB/SIMULINK environment;The IGBT open circuit fault in the auxiliary inverter was simulated to obtain the output current waveform under different fault conditions;The current output waveform was decomposed and reconstructed using db3 wavelet,and the energy value and waveform proportion coefficient were extracted as the feature vectors of fault diagnosis;BP and GRNN neural network algorithms were used for fault identification,and BP neural network and GRNN fault diagnosis models were established and tested respectively.The test results can improve the efficiency and accuracy of fault diagnosis of the auxiliary inverter,reduce the cost waste caused by over-maintenance,and provide help for the maintenance of EMUs to reduce costs and increase efficiency.

关 键 词：辅助逆变器 小波分析 故障诊断 

分 类 号：TM464[电气工程—电器]