一起110kV新建站主变差动保护动作跳闸事件分析  

Analysis of Tripping of Main Transformer Longitudinal Differential Protection in a 110kV New Substation

作　　者：蒋程然 章正亮 陈伟华 赵波 王凌荣 孙利 JIANG Chengran;ZHANG Zhengliang;CHEN Weihua;ZHAO Bo;WANG Lingrong;SUN Li(State Grid Taizhou Power Supply Company,Taizhou 318000,China)

机构地区：[1]国网浙江省电力有限公司台州供电公司,浙江台州318000

出　　处：《电工技术》2022年第19期58-60,共3页Electric Engineering

摘　　要：某110 kV新建站在投运期间,#1主变、#2主变纵差差动速断保护动作,跳开了两路进线断路器及内桥断路器,导致全站失压。为避免基建变电站再次发生类似事故,降低新设备启动投运过程中的电网安全风险,针对此次事件进行分析,查明事件原因并提出了相应的防范措施。During the operation of a new 110 kV transformer,longitudinal differential quick break protection of#1 main transformer and#2 main transformer acted.Two incoming line circuit breakers and a inner bridge circuit breaker were tripped,resulting in power loss of the whole station.To avoid similar accidents in infrastructure substations and reduce the power grid security risk during the start-up and operation of new equipment,the incident is analyzed,and the cause of the incident is found out and corresponding preventive measures are put forward.

关 键 词：新建站电站 主变 差动保护 跳闸 

分 类 号：TM774[电气工程—电力系统及自动化]