一起500 kV断路器防跳回路异常分析及改进
顾用地，张东明，许格，刘杰，彭晨光
（国网浙江省电力有限公司检修分公司，浙江 杭州 311232）
摘 要：某500 kV线路断路器出现多次合闸- 分闸的“跳跃”现象，防跳功能失败。分析了防跳失败的原因为断路器的分闸时间比防跳继电器励磁动作时间要快，在防跳回路未形成自保持的情况下，断路器完成了分闸，致使防跳失败。提出两种改进方法，一种是把防跳继电器更换为快速继电器，并采用提前闭合、延后打开型的断路器辅助接点作为启动防跳继电器励磁的断路器位置接点；另一种是在断路器合闸控制回路中增加一条短接线，利用合闸弹簧储能接点来实现防跳继电器励磁后的自保持，从而避免防跳失败。
关键词：500 kV 断路器；防跳功能；快速继电器；储能接点
中图分类号：TM561 文献标识码：B 文章编号：1007-3175(2018)04-0032-03
Abnormal Analysis and Improvement of a Case of 500 kV Circuit Breaker Anti-Jumping Circuit
GU Yong-di, ZHANG Dong-ming, XU Ge, LIU Jie, PENG Chen-guang
（Maintenance Company, Overhaul Branch of State Grid Zhejiang Electric Power Co., Ltd, Hangzhou 311 232, China）
Abstract: That certain 500 kV line circuit breaker appeared several closing-opening "jump" phenomenon causes the unsuccessful anti-jump. This paper analyzed that the reason of unsuccessful anti-jump was that the opening time of circuit breakers was shorter than the excitation action time of anti-jump relays. When the anti-jump circuit didn’t form self-holding, the circuit breaker had been opened, resulting in an anti-jump failure. Two improved methods of circuit breaker anti-jump circuits were put forward, one was to make the current anti-jump relay replaced by a fast relay, with the early closure-delayed opening of the circuit breaker auxiliary contact to start the anti-jump relay, the other was to add a short wiring in the circuit breaker closing control circuit, with the closing spring energy contacts to realize the anti-jump relay excitation self-sustaining, so as to avoid antijump failure.
Key words: 500 kV circuit breaker; anti-jump function; fast relay; spring energy contact
参考文献
[1] 陈慈萱. 电气工程基础[M]. 北京：中国电力出版社，2004.
[2] 龙启峰. 一起断路器防跳回路异常的分析与改进[J]. 陕西电力，2015，43(5)：85-87.
[3] 王建峰，裴卫政，延谦. 防跳继电器拒动故障的分析[J]. 电力学报，2009，24(5)：416-417.
[4] 李秀卿，田嘉. 断路器防跳接线故障分析及措施[J]. 东北电力大学学报，2014，34(3)：40-44.
[5] 徐春新. 防跳继电器触点卡滞导致断路器反复跳跃的问题分析[J]. 电力系统保护与控制，2009，37(12)：115-117.
[6] 周金刚，苏展，陈开达.500 kV断路器跳跃现象的原因分析和思考[J]. 湖南电力，2016，36(1)：63-65.
