GIS封闭母线放电故障原因分析及处理

Fault Analysis and Treatment of GIS Closed Bus Discharge

万家寨水电站1号主变压器高压侧过渡封闭母线在运行过程中发生放电故障。经排查,放电原因为GIS不清洁,电极间的粉尘颗粒导致SF6气体间隙被电弧击穿,触头连接烧毁,并在罐体内表面产生放电痕迹。对故障设备进行解体更换,回装时严格把控卫生质量,设备投入至今运行良好,保证了输电线路的安全稳定运行。

High voltage closed bus discharge of Wanjiazhai Hydropower Station No.1 transformer occurred during operation.After investigation,the discharge is due to unclean GIS,dust particles between the electrodes led to SF6 gas gap arc breakdown,burned the contact connection,and produced discharge traces on the tank surface.Disassembling and replacing the faulty equipment,controling the health quality strictly,equipment is so far in good condition,ensuring the safety and stability of transmission lines.