电流互感器励磁涌流引起的差动保护误动分析研究  

Analysis of Differential Protection Maloperation Caused by Magnetizing Inrush Current of Current Transformer

作　　者：黄东山[1] 李伟坚[1] 周卫[1] 

机构地区：[1]广西电网公司电力科学研究院,南宁530023

出　　处：《广西电力》2013年第2期5-7,44,共4页Guangxi Electric Power

摘　　要：研究电流互感器励磁涌流产生的内在机理及其特征。通过理论分析和仿真验证,分析励磁涌流造成差动保护误动作的原因,指出分相式原理的母线差动、线路差动保护不能完全闭锁电流互感器励磁涌流的机理,提出针对性的防范措施。The internal mechanism and characteristics of magnetizing inrush current of current transformer is analyzed. Based on theoretical analysis and simulation verification,the reason of differential protection maloperation caused by magnetizing inrush current is analyzed, and the mechanism that split phase principle based bus and line differential protection can＇t totally blocked magnetizing inrush current of current transformer is pointed out, and corresponding preventive measures are proposed.

关 键 词：差动保护 电流互感器 励磁涌流 区外故障 

分 类 号：TM773[电气工程—电力系统及自动化]