内部异物对GIS机电性能影响研究

Study on the Influence of Internal Foreign Matters on the Mechanical and Electrical Performance of GIS

气体绝缘金属封闭开关设备(GIS)气室内极其微小的异物,在重力和电场力等作用下产生的跳跃会引起绝缘介质沿面闪络或放电,造成设备损坏,影响电网安全稳定运行。通过分析1000 kV GIS内部异物放电现象,开展设备本体解体、试验、检测等工作,查找故障原因,并提出故障处理策略,对做好GIS全寿命周期管理,减少内部放电故障造成的各种事故,进而保障特高压电网安全稳定运行具有重要意义。

Gas insulated metal closed switchgear(GIS)is extremely small foreign matter in the gas chamber(GIS),the jump due to the forces of gravity and electric field would cause flashover or discharge of the insulating medium along the surface,bringing about equipment damage and affecting the safe and stable operation of power grid.By analyzing the discharge phenomenon of internal foreign matters inside a 1000 kV GIS,several operations are carried out such as the dismantle,test and detection of the equipment body,finding out the fault causes,and proposing fault troubleshooting strategies,it is of great significance to do a good job in GIS life cycle management,reduce various accidents caused by internal discharge faults,and thus ensure the safe and stable operation of UHV power grids.