摘要：针对某换流站内一罐式断路器故障引起对侧断路器失灵的问题，通过对故障录波文件、现场一次设备运行方式、保护动作进行分析，得出了对侧断路器失灵的原因并提出了预防和解决的措施。分析结果表明：故障过程中，流过对侧该断路器的故障电流的直流分量过大，使电流波形无过零点，断路器灭弧失败，最终导致失灵。所述解决措施可为现场此类事故的发生提供可行的预防和解决思路。
关键词：线路保护；重合闸；断路器；失灵
Analysis for the failure of a contralateral breaker caused by internal malfunction of a tank breaker
Chen Haoyang
（Maintenance Company of State Grid Ningxia Electric Power Co. Ltd., Yinchuan 750001, China）
Abstract:Aiming at the problem of a tank circuit breaker failure in a convertor station causing the failure of a contralateral breaker, the reasons for the failure of a contralateral breaker were obtained and the preventing measures and solutions were proposed by analyzing fault recorder documents and operating mode of primary equipment and the protection operation. The analysis result shows that the direct component of fault current flowing through the contralateral breaker during the failure process is too large, resulting in that there is no zero crossing in the current waveform and the arc extinguishing by the breaker fails, which eventually lead to the malfunction. With the mentioned solutions, preventing and solving ideas for the occurrence of such on-site accidents can be provided.
Key words: line protection,reclosing,circuit breaker, malfunction
0 引言
2016年5月16日17时53分，某电网750kV线路1（换流站A—电厂A）、线路2（换流站A—电厂B）以及电厂A 750kV Ⅱ母跳闸，事故未造成负荷损失或机组跳闸。故障发生前系统运行方式如图1所示，故障发生前换流站A侧7531、7530、7532成串运行，电厂A侧7521、7520、7522成串运行。
论文作者:王宏丽,陈昊阳
论文发表刊物:《电力设备》2017年第32期
论文发表时间:2018/4/11
标签：断路器论文; 故障论文; 电厂论文; 出了论文; 线路论文; 宁夏回族自治区论文; 生前论文; 《电力设备》2017年第32期论文;