用于GIS局部放电检测的电容型传感器  

Capacitive Coupler Used for Detecting Partial Discharge in GIS

作　　者：许高峰[1] 侍海军[1] 唐炬[1] 朱伟[1] 魏钢[1] 唐治德[1] 

机构地区：[1]重庆大学高电压与电工新技术教育部重点实验室,重庆400044

出　　处：《重庆大学学报（自然科学版）》2003年第4期86-89,共4页Journal of Chongqing University

基　　金：重庆市应用基础基金资助项目 ( 2 0 0 2 -4 5 )

摘　　要：气体绝缘组合电器 (GIS)的同轴结构有利于局部放电激发的电磁场传播 ,为内部传感器检测局部放电提供了有利的条件 ,针对GIS结构及其中局部放电的特点 ,设计了用于局放信号检测的圆板型和圆环型两种内置电容耦合式传感器 ,描述了该传感器的结构。通过方波响应试验仿真与试验实测研究了传感器频率响应特性 ,并采用方波信号输入输出关系曲线分析了传感器对暂态信号耦合的输入输出特性。用所设计的传感器进行GIS模拟装置中电晕放电脉冲实测 ,实测结果表明设计的传感器性能可靠 ,灵敏度较高 。The coaxial configuration of gas-insulated substations is of great advantages transmitting the electromagnetic wave excitated by partial discharge and of great advantages of partial discharge detection. Based the characteristics of configuration of GIS and PD signals inside, the authors design a disc coupler and a loop coupler for continuous monitoring of partial discharge in GIS, and analyze the sensor's characteristics theoretically. The frequency response (FR) characteristics of the disc coupler and the loop coupler are analyzed by the simulation and measurement realistically of square wave response. In addition, the measured results of partial discharge by the sensors designed in GIS are given, and it is shown that the sensors designed are available for the measurement of partial discharge in GIS.

关 键 词：气体绝缘组合电器 局部放电检测 方波响应 GIS 电容型传感器 电磁场传播 

分 类 号：TM855[电气工程—高电压与绝缘技术] TP212.1[自动化与计算机技术—检测技术与自动化装置]