基于EWT的充电站主变流器中的IGBT故障检测  

IGBT fault detection in main converter of charging station based on EWT

作　　者：李乐[1] 苏建徽[1] 施永[1] 赵锐 LI Le;SU Jianhui;SHI Yong;ZHAO Rui(Education Ministry Engineering Research Center of Photovoltaic System,Hefei University of Technology,Hefei 230009,China;College of Automation&College of Artificial Intelligence,Nanjing University of Posts and Telecommunications,Nanjing 210003,China)

机构地区：[1]合肥工业大学光伏系统教育部工程研究中心,安徽合肥230009 [2]南京邮电大学自动化学院人工智能学院,江苏南京210003

出　　处：《安徽大学学报（自然科学版）》2021年第4期41-46,共6页Journal of Anhui University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51907045);江苏省自然科学基金青年基金资助项目(BK20160894)。

摘　　要：随着电动汽车数量的增加,充电站数量也大量增加.主变流器为充电站的核心部件,其中的绝缘栅双级晶体管(insulated gate bipolar transistor,简称IGBT)易出现故障,该故障会危及电网安全.提出基于经验小波变换(empirical wavelet transform,简称EWT)的充电站主变流器中的IGBT故障检测方法.建立充电站的Simulink模型,对IGBT的故障进行分析.将不同状态下特征分量的小波能量熵进行对比,结果表明该检测方法能对IGBT故障进行准确检测.With the increase in the number of electric vehicles,the number of charging stations has also increased substantially.The main converter is the core component of the charging station,and the insulated gate bipolar transistor(IGBT)in it is prone to failure,which can endanger the safety of the power grid.A method of IGBT fault detection in main converter of charging station based on empirical wavelet transform(EWT)was proposed.The Simulink model of charging station was established to analyze the faults of IGBT.The wavelet energy coefficients of the characteristic components in different states were compared.The results showed that the proposed method could detect IGBT faults accurately.

关 键 词：经验小波变换 充电站 主变流器 故障检测 

分 类 号：TM743[电气工程—电力系统及自动化]