摘要
为了研究某550 kV换流站断路器合闸电阻发生多起烧损事故的原因,避免事故再次发生和扩大,文中通过录波分析、返厂解体分析和仿真计算等手段,获取了较多的支撑原因的证据。研究表明:滑动触指部位涂抹了过多的润滑脂,在触头高速运动过程中,掺杂着银屑的润滑脂随着气流被带到绝缘拉杆和保护管,多次累积引起沿面放电,在触头预击穿的暂态电压下发生了击穿,最终使合闸电阻烧损。
For studying the causes of multiple burnout of the closing resistor of a 550 kV converter circuit breaker and avoiding the reoccurrence and expansion of the fault,the sufficient evidence supporting the fault is obtained by such measures as recording analysis,disintegration analysis at factory and simulation calculation etc.The study shows that excessive grease is applied to the sliding contact finger.During the high-speed movement of the contact,the grease mixed with silver crumbs is brought to the insulation rod and protective tube with the airflow and the multiple accumulation leads to surface discharge.The breakdown is occurred at the transient voltage of contact pre-breakdown and finally the closing resistor is burnt out.
作者
李爽
唐佳能
曲妍
鲁旭臣
LI Shuang;TANG Jianeng;QU Yan;LU Xuchen(State Grid Liaoning Electrical Power Research institute,Shenyang 110006,China;State Grid Liaoning Electrical Power Co.,Ltd.,Shenyang 110006,China)
出处
《高压电器》
CAS
CSCD
北大核心
2021年第12期232-236,共5页
High Voltage Apparatus
关键词
合闸电阻
烧损
换流站
合闸
涌流
closing resistor
burnout
converter station
closing operation
inrush current