摘要
分析了某220kV输电线路单相高阻接地故障时线路保护、断路器重合闸的动作行为,找到了引起220kV线路跳闸的原因,发现了线路故障的故障点,因光缆绑扎线断开后随风飘荡,造成绑扎带短接电气间隙对塔身放电所致。提出了加强对钢管塔易挂物、夹物点进行滑脱处理,预防飘浮物夹挂短接空气间隙的设计方案。并拟将"禁止采用不锈钢扎带固定光缆引下线"作为《十八项电网重大反事故措施》的一项补充内容。
Analysis of a certain 220 kV transmission line single-phase high resistance grounding fault line protection, circuit breaker reclosing behavior, founding the cause of 220 kV line tripping line fault points, because of the cable tie is broken after blowing in the wind, causing binding with electrical clearance of tower body discharge due to short, put forward to strengthen the hanging steel pipe tower is easy, clamp slippage processing point, prevention of float clamp short answer the design scheme of air gap. And the proposed ＂no stainless steel cable tie fixed cable down lead＂ as the grid 18 major anti-accident measures an added content.
出处
《河南电力》
2014年第3期8-9,共2页
Henan Electric Power
关键词
线路故障
光纤纵联差动保护
光缆扎带
反措
Line fault
The optical longitudinal differential protection
Cable tie
Counter measures
