系统振荡对变压器阻抗保护的影响测试方法研究  

Study on the Test Method of Influence of System Oscillation on Transformer Impedance Protection

作　　者：陈晨 魏宁 胡宝 梁浩爽 朱献周 CHEN Chen;WEI Ning;HU Bao;LIANG Haoshuang;ZHU Xianzhou(XJ Electric Co.,Ltd.,Xuchang 461000,China)

机构地区：[1]许继电气股份有限公司,河南许昌461000

出　　处：《电工技术》2021年第16期111-113,共3页Electric Engineering

摘　　要：对于变压器阻抗保护,系统振荡时测量阻抗的幅值与相角都会发生周期性的变化,为避免测量阻抗进入保护的动作区时保护误动作,变压器阻抗保护增加振荡闭锁逻辑。简要介绍了系统振荡对变压器阻抗保护影响的三种测试方法,并对比三种方法的利弊。For transformer impedance protection,the amplitude and phase angle of measured impedance will change periodically when the system oscillates.In order to avoid misoperation of the protection when the measured impedance enters the action area of the protection,the oscillation blocking logic is added to the transformer impedance protection.The three test methods of the impact of system oscillation on transformer impedance protection are briefly introduced,and the advantages and disadvantages of the three methods are compared.

关 键 词：系统振荡 变压器 阻抗保护 振荡闭锁 

分 类 号：TM732[电气工程—电力系统及自动化]