摘要
介绍了1起因1根树枝导致穿墙套管两相之间短路,从而引发主变压器差动保护动作,复位时又发现CPU插件更换后未执行复位操作程序而导致合智装置处于闭锁未能复归的故障案例,经过查找故障原因,提出了具体的防范措施,为降低该类故障提供了借鉴经验。
A fault case is introduced in this paper,that is,a branch caused a short circuit between two phases of wall bushing,which caused the differential protection action of main transformer.During the reset,it was found that the reset operation procedure was not executed after the CPU plug-in was replaced,which led to the locking and failure of reset of integrated merging unit and intelligent terminal.After the cause of the fault is found out,the specific preventive measures are put forward,which provides reference for reducing the occurrence of this kind of fault.
作者
张登宇
ZHANG Dengyu(Shuozhou Power Supply Company of State Grid Shanxi Electric Power Company,Shuozhou,Shanxi 036002,China)
出处
《山西电力》
2022年第4期12-14,共3页
Shanxi Electric Power
关键词
主变压器
跳闸
穿墙套管
差动保护
main transformer
trip
wall bushing
differential protection
