一起 252 kV GIS 盆式绝缘子放电故障分析

Analysis on Discharge Fault of Basin － type Insulator in 252 kV GIS

摘要:

对一起 252 kV GIS 盆式绝缘子在送电过程中以及在修复后的耐压试验过程中沿面闪络放电故障进行了分 析，结合故障录波、SF6 气体分解产物检测等技术手段确定了故障气室位置，解体分析了盆式绝缘子沿面放电故障原 因和发展过程，提出金属嵌件与环氧树脂结合处工艺处理不良以及基建安装时绝缘子表面清理不彻底是导致放电的 主要原因，最后提出了 GIS 设备在设计、安装调试等方面的几点建议。

Abstract:

The surface flashover discharge fault of basin － type insulator during breaker operation and AC withstand voltage test is analyzed． By combing with the fault recording and SF6 gas decomposition product detection，the fault gas chamber is located accurately，the main reasons of surface flashover and degradation process are analyzed by disassembling the fault chamber． It is proposed that the processing of epoxy resin and the incomplete cleaning of insulator surface are the main causes for discharge fault． Finally，some suggestions for structure design and installation of GIS are proposed．