主变差动保护误跳闸事件分析  

Analysis on a Differential Protection False Trip of Main Transformer

作　　者：程远昊 宋强 CHENG Yuanhao;SONG Qiang(Xiuwu Power Supply Company,Xiuwu 454350;Jiaozuo Power Supply Company,Jiaozuo 454000)

机构地区：[1]国网河南省电力公司修武供电公司,河南修武454350 [2]国网河南省电力公司焦作供电公司,河南焦作454000

出　　处：《电力安全技术》2021年第12期25-27,共3页Electric Safety Technology

摘　　要：针对一起10 kV线路保护区内故障导致35 kV终端变电站主变差动保护动作的事故,通过分析、论证,找出差动保护错误动作的主要原因,提出解决方案,减少主变保护误动作次数及负荷损失,保障电网安全运行。In view of an event that a fault occurred in a 10 kV line protection area led to the differential protection action of main transformer in 35 kV terminal substation,analysis and demonstration are conducted to find out the main causes of the differential protection false action,and a solution is put forward to reduce the number of main transformer protection false action and load loss,so as to ensure the safe operation of power grid.

关 键 词：终端变电站 主变压器 差动保护 误跳闸 

分 类 号：TM772[电气工程—电力系统及自动化]