矿用高压变频器中IGBT模块在阶跃脉冲下局部放电特性  

Partial discharge characteristics of IGBT module in mine frequency converter under step pulse

作　　者：王彦文[1] 冯琛 陈鹏 高志宣[1] 孙燕盈 王乐 Wang Yanwen;Feng Chen;Chen Peng;Gao Zhixuan;Sun Yanying;Wang Le(School of Mechanical Electronic&Information Engineering,China University of Mining&Technology-Beijing,Beijing 100083,China;The Ohio State University,Columbus Ohio 43210,USA)

机构地区：[1]中国矿业大学(北京)机电与信息工程学院,北京100083 [2]美国俄亥俄州立大学高电压实验室,俄亥俄州哥伦布43210

出　　处：《矿业科学学报》2020年第5期536-545,共10页Journal of Mining Science and Technology

基　　金：国家留学基金(20173109)。

摘　　要：针对矿用高压变频器常因IGBT模块内部发生局部放电而导致故障的原因和特性进行了研究。本文从微观角度观察了IGBT模块局部放电发生位置的结构特点,发现其结构绝缘薄弱处在高斜率阶跃脉冲作用下易发生局部放电现象;建立了IGBT模块在阶跃脉冲作用下的局部放电过程模型,揭示其发生局部放电的机理;搭建实验平台,测试IGBT模块在单个脉冲作用下的局部放电特性。实验结果表明,脉冲的上升时间、脉冲宽度是影响局部放电起始电压的主要因素;根据实验数据的分析,提出了预测局部放电起始电压的计算公式。研究结果可为煤矿电力电子设备IGBT模块的绝缘设计和使用时的电压限制提供参考依据。The partial discharge occurs in IGBT device module of mine equipment.which leads to the breakdown of insulation and burns the device.In this paper the causes and characteristics of pd in IGBT module were studied.Therefore,based on the research of material structure,the partial discharge process model for the internal circuit of IGBT device module in coal mine equipment,which is under ultra-high slope pulse square wave,is innovatively proposed and verified by experiments.Then,the partial discharge characteristics of the device module under monopulse or repeated pulses are tested by the experimental platform,and the influence of the pulse rise time and pulse width on the partial discharge of the internal circuit of the device module is analyzed.According to the experiment results of partial discharge under a single pulse,the prediction formula for predicting and calculating the partial discharge initial voltage is innovatively proposed and verified.A certain reference for the insulation design and performance conditions of IGBT device modules in mine equipment is provided.

关 键 词：矿用高压变频器 局部放电 IGBT模块 起始电压预测公式 

分 类 号：TM85[电气工程—高电压与绝缘技术]