交流窜入直流后引起断路器误跳闸的原因及对策  

Study on Causes and Countermeasures of Circuit Breaker Mistrip Caused When AC Enters DC

作　　者：苏江武 SU Jiangwu(Hejin Power Generation Branch of Jin Control Power Co.,Ltd.,Hejin,Shanxi 043300,China)

机构地区：[1]晋控电力河津发电分公司,山西河津043300

出　　处：《山西电力》2021年第5期42-44,共3页Shanxi Electric Power

摘　　要：针对某电厂机组运行中多台断路器发生误跳闸事件,从设备的设计安装及断路器跳闸线圈动作功率的选择等方面进行了分析计算,得出了因断路器跳闸线圈选型不合理导致交流窜入直流控制回路后引发断路器误跳闸的结论,提出了预防类似事故发生的思路和方案,解决了断路器误跳闸的问题。During the operation of certain power plant units,mistrip events occurred in many circuit breakers.Therefore,certain related elements,such as the design and installation of the equipment,the selection of the operating power of the circuit breaker trip coil and so on are analyzed and calculated,and it is concluded that the circuit breaker mistrip will be triggered when the unreasonable selection of the trip coil of the circuit breaker causes the AC to enter DC control circuit.The ideas and solutions to prevent similar accidents are put forward and the problem of circuit breaker mistrip is solved.

关 键 词：断路器 误跳闸 跳闸线圈 动作功率 

分 类 号：TM561[电气工程—电器]