摘要
本文针对一起特高压变电站1100kV气体绝缘金属封闭开关设备母线跳闸故障进行了分析。阐述了故障发展过程,结合现场诊断、解体检查及返厂试验情况,分析认为母线盆式绝缘子电连接装配间隙处存在异物,在盆子表面残余电荷、操作过电压等因素作用下,造成盆子沿面闪络是此次事故的主要原因,最后提出了相应的改进措施及建议。
In this paper,a bus trip fault of a 1100kV gas-insulated metal-enclosed switchgear in an UHV substation is analyzed.The development process of the fault is described.Combined with on-site diagnosis,disassembly inspection and factory test,it is analyzed that there are foreign objects in the assembly gap of the busbar insulator electrical connection.The main cause of the accident is flashover along the basin surface due to the residual electric charge on the surface of the basin and operating overvoltage.Finally,corresponding improvement measures and suggestions are put forward.
作者
余爽
赵科
YU Shuang;ZHAO Ke(Maintenance Branch of State Grid Jiangsu Electric Power Co.,Ltd,Nanjing 211100;Electric Power Research Institute of State Grid Jiangsu Electric Power Co.,Ltd,Nanjing 211100)
出处
《电气技术》
2021年第4期94-97,共4页
Electrical Engineering
