某发电站变压器纵联差动保护动作原因分析及整改措施  

Cause Analysis and Improvement Measures of Transformer Longitudinal Differential Protection Action in a Power Station

作　　者：贺丽君 欧中杰 HE Lijun;OU Zhongjie(Yongchuan Power Supply Branch,State Grid Chongqing Electric Power Company,Chongqing 404100,China;Chongqing Rail Transit(Group)Co.,Ltd.,Chongqing 400000,China)

机构地区：[1]国网重庆市电力公司永川供电分公司,重庆404100 [2]重庆市轨道交通(集团)有限公司,重庆400000

出　　处：《电工技术》2021年第3期87-88,91,共3页Electric Engineering

摘　　要：针对某发电站发生的一起主变纵联差动保护动作导致发电机组全部跳闸事故,对主变保护装置的功能配置、纵联差动保护工作原理及二次回路设计等进行了分析,对故障录波装置和保护装置动作记录进行了查询和判断,最终确定了主变纵联差动保护动作的真实原因,并进行了整改,以杜绝类似事故的再次发生。In response to a main transformer longitudinal differential protection action in a power station that caused all generator sets to trip,the functional configuration of the main transformer protection device,the working principle of longitudinal differential protection and the design of the secondary circuit are analyzed.The operation records of fault recording device and protection device are inquired and judged,and the real cause of longitudinal differential action of main transformer is finally determined.Rectifications is made to prevent similar accidents from happening again.

关 键 词：发电站 保护动作 跳闸 

分 类 号：TM774[电气工程—电力系统及自动化]