振荡冲击电压下针板缺陷局部放电研究  

Study of Partial Discharge Characteristics of Needle-plate Defect Under Oscillatory Impulse Voltage

作　　者：刘蓉[1] 李继胜[2] 田维坚[1] 樊养余[1] 

机构地区：[1]西北工业大学,电子信息学院,陕西西安710072 [2]陕西师范大学,物理学与信息技术学院,陕西西安710062

出　　处：《电力电子技术》2014年第4期37-40,共4页Power Electronics

基　　金：陕西省自然科学基金(2013JM1010);中央高校基本科研业务费专项资金项目(GK201402013)~~

摘　　要：为了研究振荡冲击电压针板缺陷局部放电(PD)特性,设计了产生波形符合IEC60060-3规定的振荡冲击波形发生器,根据等效电路模型,推导出波形参数表达式;研究了线圈匝数、积分电阻及磁芯对传感器工作带宽的影响关系,设计制作了一款具有高灵敏度、宽频带的高频电流传感器,在此基础上建立了一套完整的振荡冲击电压下光、电PD检测系统;初步研究了振荡冲击电压下针板缺陷PD特征。试验结果表明,该系统能有效测量纳秒级PD脉冲,为深入研究冲击电压下PD特性和机理提供了有效的试验平台和依据。In order to study partial discharge （PD） characteristic of needle-plate defect under oscillatory impulse voltage, an oscillation waveform generator is designed and the output waveform is consistent with IEC6006-3 ,also the waveform parameters expressions are presented based on the equivalent circuit model.A high-frequency current trans- ducer which has wideband, excellent high frequency characteristic and sensitivity is developed based on study the ef- fects of magnetic core,coil turns and integral resistance on frequency properties.The PD measurement system which detects the PD signals of needle-plate model under oscillatory impulse voltage is provided finally.Experiment shows that by adopting this test system, the source interferences are restrained and PD signals are effectively extracted, therefore it could be provide effective test platform to study PD characteristics under oscillatory impulse voltage in depth, and explore the mechanism behind it.

关 键 词：振荡冲击电压 高频电流传感器 动态响应 局部放电 

分 类 号：TM835.4[电气工程—高电压与绝缘技术]