1000kV GIS设备故障检测及实例分析

Fault Detection and Case Analysis of 1000 kV GIS Equipment

针对一起特高压变电站1000kV气体绝缘封闭开关设备(GIS)开关合闸电阻气室绝缘盆击穿故障,介绍了绝缘故障的定位和分析方法,结合保护动作情况、故障录波信息以及六氟化硫(SF6)气体分解物检测等多种手段确定了故障气室,对故障气室进行返厂解体检查,确定故障是由气室内部异物造成的绝缘盆沿面放电所导致。该实例分析为其他特高压站GIS故障的快速判断提供了借鉴。

Aiming at an insulation tub breakdown fault of switch closing resistor air chamber in 1 000 kV GIS of ultra-high voltage substation,this paper introduced the location and analysis method of insulation fault,and combined with the protective action condition,fault recording information and the test situation of the SF6 gas component etc means to determine the malfunction air chamber.The malfunction air chamber was returned to the factory for disassembly inspection,to make sure the fault that the foreign matter inside air chamber causes the discharge along dielectric surface of insulation tub.This instance analysis provides references for fast judgment of GIS faults in other ultrahigh voltage.