一起1000kV断路器操作机构压力低闭锁故障分析
Analysis of a Low Pressure Blocked Failure of 1000 kV Circuit Breaker Operating Mechanism
张旭 1朱宁宁 2李卓阳 1曹冬青 1李睿泽 1赵天宇1
作者信息
- 1. 国网河北省电力有限公司超高压分公司,河北 石家庄 050071
- 2. 国网河北省电力有限公司石家庄供电分公司,河北 石家庄 050030
- 折叠
摘要
断路器液压操作机构的可靠性对于电网的安全稳定运行至关重要,对其进行故障分析必不可少.对某 1000 kV断路器分闸后报操作机构压力低闭锁的故障情况以及 HMB-4/8 型断路器二次回路特殊点进行介绍,对操作机构相关二次回路进行逐一排查、逐步分析,最终得到故障原因为打压继电器卡涩.但在故障排查过程中压力闭锁指示灯显示与现场不符,对排查工作起到误导.最后提出了操作机构压力闭锁指示回路改进方案,使得压力闭锁告警提示更加有指向性,有助于工作人员定位故障位置,缩短故障排查时间,为 1000 kV断路器检修试验故障排查相关工作提供参考,对提高电网运行可靠性具有积极意义.
Abstract
The reliability of the circuit breaker hydraulic mechanism is essential for the safe and stable operation of the power grid,and its failure analysis is indispensable.A low pressure blocked failure of 1000 kV circuit breaker operating mechanism and the process of fault occurrence is briefly explained.The exceptional case about the secondary circuit of the HMB-4/8 breaker is presented,and the cause of the fault is derived from a comprehensive analysis by elaborating the working principle of the circuit breaker hydraulic mechanism and in-depth inspection of the circuit breaker external circuit and internal mechanism.Finally,the switch pressure blocking indication circuit was improved to shorten the troubleshoot-ing time,which has positive significance to improve the reliability of grid operation.
关键词
断路器/液压机构/机构压力低闭锁Key words
circuit breaker/hydraulic mechanism/low mechanism pressure blocked引用本文复制引用
出版年
2024
NETL
NSTL
万方数据