一起252kVGIS设备故障分析

Analysis on a Fault of 252 kV GIS Equipment

分析了一起252 kV GIS故障,相关试验表明故障气室的SO2和H2S含量较高。分析认为故障的直接原因是设备安装中出现纰漏,母线导体插入深度过短,或者限位卡箍未起作用,当线路发生接地时在电动力作用下导体套筒轴向位移过大,引起母线放电烧损,为此提出了防范的措施。

The paper analyzes a fault of 252 kV GIS equipment. The test shows that SO2 and H2S concentra- tions in the faulty chamber are high. It is analyzed that the fault is caused by careless mistakes during equip- ment installation, short insertion of bus conductor or failure of stopper clips. When the lines are grounded, there is a large axial shift of conductor bushing due to electrodynamic force, which causes discharge burning of the conductor. Therefore. the Daner nrnnn~ ~;