110kV线路故障导致变压器保护动作分析  

Analysis of Transformer Protective Action Caused by 110 kV Line Fault

作　　者：王忠[1,2] 

机构地区：[1]大同供电分公司,山西大同037008 [2]华北电力大学,北京102206

出　　处：《山西电力》2012年第2期18-19,共2页Shanxi Electric Power

摘　　要：对110 kV变压器中性点过电压问题、接地方式的控制以及目前大同电网110 kV变压器零序过电压保护设计存在的安全隐患等进行了初步探讨,提出加大部分中性点间隙或提高动作值,改善变压器零序保护配合的措施。Neutral point over-voltage problem of 110 kV transformer and the control of grounding mode are explored in this paper.Besides,zero-sequence over-voltage protection of 110 kV transformer in Datong power grid is discussed in terms of the potential security trouble in design.It is suggested to widen the protective gap of neutral point or increase the action value and adopt suitable measures to improve transformer zero-sequence protection.

关 键 词：变压器 中性点 零序过电压保护 

分 类 号：TM72[电气工程—电力系统及自动化]