给水泵电机启动时差动保护误动原因分析及处理  

Analysis and Treatment of Differential Protection Misoperation During Startup of the Feed Pump Motor

作　　者：王济娟 郭鹏 WANG Jijuan;GUO Peng(Datang Mirabo Power Generation Company Limited,Aceh 23681,Indonesia;Meihekou Shiji Power Technology Company Limited,Tonghua 135022,China)

机构地区：[1]大唐米拉务发电有限公司,印度尼西亚亚奇23681 [2]梅河口世基电力科技有限公司,吉林通化135022

出　　处：《吉林电力》2023年第5期50-53,共4页Jilin Electric Power

摘　　要：针对某电厂给水泵电机在启动过程中因电流互感器饱和造成差动保护误动事件进行了原因分析,从录波图中给水泵电机启动时引起电流互感器饱和的不同时刻直流分量进行了分析,得到了差动保护误动的原因,对二次回路、保护定值、软件程序、采样板硬件进行了优化,保证了给水泵电机能够正常启动,机组设备稳定运行。In response to the problem of differential protection malfunction caused by current transformer saturation during the startup process of a power plant feedwater pump motor,the DC components at different times of current transformer saturation during the startup of the feedwater pump motor were analyzed from the oscillogram,and the reasons for differential protection malfunction were obtained.The secondary circuit,protection settings,software programs,and sampling board hardware have been optimized to ensure that the feed pump motor can start normally and the unit equipment operates stably.

关 键 词：差动保护 电流互感器 暂态饱和 

分 类 号：TM306[电气工程—电机]