串联变压器和应涌流引起差动保护动作的原因及对策  

Reasons and Countermeasures of Differential Protection Motion by Series-transformer Sympathetic Inrush

作　　者：刘建戈 

机构地区：[1]江苏省金湖县供电公司,江苏金湖211600

出　　处：《电气技术》2012年第10期61-63,69,共4页Electrical Engineering

摘　　要：某厂用变电站在10kV变压器投运过程中多次发生上一级35kV变压器差动保护动作的现象,通过分析变压器励磁流通及和应涌流产生原因和特点,串联变压器和应涌流对电流互感器和差动保护的影响,采取调整差动保护定值和避免电流互感器饱和等方法,避免了串联变压器和应涌流对差动保护的误动作的影响。The 35kV transformer differential factory substation operated, analysis of causes and protection acted when the l OkV transformer in A characteristics of transformer magnetizing current and inrush current,and influenced CT and the differential protective by Series-transformer sympathetic inrush. By adjusting the fixed value of differential protection and avoiding CT saturation, and avoid the effect of series-sympathetic inrush of transformer differential nroteetion

关 键 词：串联 和应涌流 差动保护 饱和 

分 类 号：TM772[电气工程—电力系统及自动化]