变压器过激磁保护分析及改进  

Operation analysis on overexcitation protection for transformer and its improvement

作　　者：耿卫星 刘建武 刘春玲 孟祥萍[4] 马炜 

机构地区：[1]银川供电局保护自动化所,宁夏银川750001 [2]宁夏先科电力设计咨询有限公司,宁夏银川750001 [3]吴忠供电局变电检修工区,宁夏吴忠751100 [4]长春工程学院,吉林长春130001

出　　处：《电力系统保护与控制》2009年第22期181-183,共3页Power System Protection and Control

基　　金：吉林省教育厅'十一五'科学技术研究项目(吉教科合字2007200号)

摘　　要：通过介绍微机型变压器过激磁保护装置的构成及基本原理,从铁磁谐振角度出发分析了电压互感器二次侧电压不平衡现象,分析误动原因,并提出改进方案。实验及仿真分析表明所提方案理论上可行、应用中正确,可以有效解决变压器过激磁保护误动问题,从而对工程应用起到指导和改进的积极作用。From ferroresonance perspective, the paper analyzes the voltage unbalance apearance at the secondary side of potential transformer and the reason of misoperation after illustrating the constitution and basic principles of microcomputer overvoltags ＆ overcexcitation protection and proposes the improvement scheme. Experiment and simulation analysis indicates that proposed scheme is fealsible in terms of the theory and applicable. It can resolve efficiently the problem of misoperation of overexcitation protection for transformer, thus it can play positive roles to direct and improve engineering application.

关 键 词：变压器 过激磁保护 误动作 改进方案 

分 类 号：TM774[电气工程—电力系统及自动化]