六相两电平逆变器的开路故障定位研究  

Open Circuit Fault Diagnosis for the Six-phase Two-level Inverter

作　　者：袁庆庆 蒋楷行 涂谦 燕磊 YUAN Qing-qing;JIANG Kai-xing;TU Qian;YAN Lei(Shanghai University of Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学机械工程学院电气工程系,上海200093

出　　处：《电力电子技术》2023年第4期5-8,共4页Power Electronics

基　　金：国家重点研发计划(2018YFB04603);上海市青年科技英才扬帆计划(2018YF14300)。

摘　　要：针对六相两电平逆变器开路故障类型多、定位复杂问题,提出一种利用小波包分解获取六相逆变器电路故障相特征和基于支持向量机(SVM)的六相逆变器开路故障定位方法。在分析六相逆变器开路故障类型的基础上,利用小波包分析提取故障特征向量,再基于SVM进行故障分类。针对不同类型双管故障存在的因小波包能量值相似而出现的误判问题,提出了一种基于平均电流结合小波包分析的故障特征向量构造方法。实验结果表明,所研究的故障定位方法能实现六相两电平逆变器不同开路故障的有效定位。A method of six-phase two-level inverter open circuit fault diagnosis is proposed for its multi types of open circuit fault and complex problems of location.Firstly,wavelet packet decomposition is used to obtain faulty features and support vector machine(SVM)is used to locate faulty point.To deal with the problem of misjudgment due to the similarity of wavelet packet energy values in different types of multi-switches faults,a method of constructing fault vectors based on average current has been proposed and analyzed.Experimental results show that this method can accurately diagnose and locate the open faulty for this topology.

关 键 词：逆变器 开路故障 小波包分析 

分 类 号：TM464[电气工程—电器]