某220kV线路开关三相跳闸误动事件分析

Analysis of a Misoperation Event of a 220kV Line Switch Three-phase Tripping

高压线路开关的开合状态决定线路运行方式,其开合状态是系统运行调度中的重点监测对象。本文针对一起220kV线路开关的三相跳闸误动作事件展开研究,梳理事故经过,检查断路器机构情况,分析开关误动作原因,并根据分析情况提出后续措施,旨在通过三相跳闸事件分析整套保护系统的缺陷环节,避免更大事故的发生。

The opening and closing status of the high-voltage line switch determines the line operation mode,and its opening and closing status is the key monitoring object in the system operation scheduling.In this paper,a misoperation event of a 220 kV line switch three-phase trip is carried out,sorting out the accident,inspecting the mechanism of the circuit breaker,and analyzing the cause of the switch misoperation.According to the analysis,follow-up measures are proposed,aiming to analyze the defects of the whole protection system through the three-phase trip event and avoid the occurrence of larger accidents.