110kV变压器差动保护误动作分析与改进  

Analysis and Improvement of 110kV Transformer Differential Protection Misoperation

作　　者：杨静 刘丛洲 夏超 张时敏 孙东杰 汤大海 YANG Jing;LIU Congzhou;XIA Chao;ZHANG Shimin;SUN Dongjie;TANG Dahai(Zhenjiang Power Supply Company,Zhenjiang 212001)

机构地区：[1]国网江苏省电力有限公司镇江供电分公司,江苏镇江212001

出　　处：《电力安全技术》2021年第11期53-55,共3页Electric Safety Technology

摘　　要：针对某110kV智能变电站1号变压器差动保护在正常运行时发生的误动作跳闸故障,通过分析故障录波图和装置内部程序等信息,找到了该差动保护误动作跳闸原因,提出了针对该保护装置的设计改进措施和反事故措施,使得该差动保护的运行状态得以改善,至今未再出现误动作。In allusion to a trip fault of the differential protection device of No.1 transformer in a 110kV intelligent substation during normal operation.By analyzing the fault oscillogram and the internal program of the device,the causes that lead to misoperation and trip of the differential protection device are found out,and the corresponding design improvement measures and anti-accident countermeasures are put forward,which enables the operation state of the differential protection device to be improved without misoperation any more.

关 键 词：智能变电站 变压器 差动保护 误动作 反事故措施 

分 类 号：TM403.5[电气工程—电器]