基于本地电气量的无故障跳闸新判据  

A New Method of Identifying Non-fault Line Tripping Based on Local Electrical Measurements

作　　者：方勇杰[1] 徐海波[1] 

机构地区：[1]国网南京自动化研究院/南京南瑞集团公司,江苏省南京市210003

出　　处：《电力系统自动化》2008年第3期33-35,65,共4页Automation of Electric Power Systems

基　　金：国家电网公司重大科技创新专项任务合同(SGKJ[2007]98;SGKJ[2007]99);国家电网公司电力系统安全稳定分析与控制重点实验室资助项目~~

摘　　要：传统的无故障跳闸判据只检测线路上潮流的突然变化,在潮流转移后线路轻载时容易导致稳定控制装置的误动。文中分析了不同情况下线路首端测量阻抗的特性,揭示了装置安装处的测量阻抗值在线路无故障跳闸时和潮流转移时具有明显差异的机理,提出了基于本地电气量计算出的测量阻抗的无故障跳闸新判据,并用数字仿真验证其有效性。The traditional method of identifying non-fault line tripping is based on the detection of only the sudden variation of line power flow and is likely to cause unintended operation of stability control devices under such conditions as light loading after a system swing. This paper presents an analysis of the measured impedance characteristics at one end of the transmission line under different conditions, reveals the mechanism of the measured impedance having distinct different Values for non-fault line tripping out and power Swing, and then proposes a new method of identifying non-fault line tripping based on local impedance measurement. Digital simulation results are given to validate the new method.

关 键 词：稳定控制 无故障跳闸 潮流转移 测量阻抗 开路阻抗 本地电气量 

分 类 号：TM762[电气工程—电力系统及自动化]