改进电磁耦合法在振荡波局部放电试验中的应用  

Application of the improved electromagnetic coupling method in partial discharge test of oscillating wave

作　　者：李梦滔 张国志 万子逸 周涛 万航 周凯[2] Li Mengtao;Zhang Guozhi;Wan Ziyi;Zhou Tao;Wan Hang;Zhou Kai(Kunming Power Supply Bureau,Yunnan Electric Power Grid Co.,Ltd.,Kunming 650200,China;School of Electrical Engineering and Information,Sichuan University,Chengdu 610065,China)

机构地区：[1]云南电网有限责任公司昆明供电局,昆明650000 [2]四川大学电气信息学院,成都610065

出　　处：《电测与仪表》2018年第19期97-100,111,共5页Electrical Measurement & Instrumentation

基　　金：南方电网重点项目(00301SY00022)

摘　　要：振荡波测试系统因其能带动大容量试品的能力而被广泛应用到长电缆局部放电测试中。为有效提高振荡波测量系统的灵敏度,从理论角度分析传统脉冲电流法对长电缆测试的局限性,进而提出一种改进电磁耦合法用于振荡波局部放电测试。通过对测试回路注入不同电荷量的脉冲对比两种测量方式的测量精度,进而搭建振荡波测试平台,对两种方式下的测量信号特征进行分析。实验结果表明,改进电磁耦合法具有更高的灵敏度,并且受到较小的低频干扰。An oscillation wave test system(OWTS)can carry high capacity load,which was generally used in long cables partial discharge test.In order to improve the sensitivity of OWTS measurement system effectively,the limitations of typical impulse current detection method when used in long cables is analyzed theoretically,and an improved electromagnetic coupling method is presented for OWTS.To compare the measurement precision of two methods,different load quantities of pulse are applied in measured loop.To analyze the characteristic of measurement signals in two methods,and the test platform based on oscillating wave is established by using two methods.From the experimental result,the improved electromagnetic coupling method has higher sensitivity,and more difficult to be interference by low frequency signal.

关 键 词：振荡波 局部放电 长电缆 测试方法 电磁耦合法 

分 类 号：TM933[电气工程—电力电子与电力传动]