大型电动机差动保护启动动作原因分析及对策  

Operation Case analysis and Treatment of Differential Protection Starting of Large Generator

作　　者：许涌平 王皑[2] 刘东 李强[2] 

机构地区：[1]山西南自晋能自动化成套有限公司,山西太原030001 [2]山西省电力公司,山西太原030001 [3]山西榆社电厂,山西榆社031800

出　　处：《山西电力》2007年第6期5-7,共3页Shanxi Electric Power

摘　　要：根据大型电动机差动保护在电机启动中动作的现象进行分析,指出了中性点CT饱和、引起CT二次电流发生畸变是造成差动保护动作的原因,并提出了解决该问题的几种办法。The phenomenon of current differential protection acting in large-scale electromotor start period is analyzed, and the distortion of CT secondary current caused by CT saturation is the differential protection movement reason, and several methods to solve the problem are proposed.

关 键 词：电流互感器 二次电流 差动保护 中性点 畸变 饱和 

分 类 号：TM452[电气工程—电器]