摘要
在三相线路上发生单相接地故障时,线模行波极性受保护线路两侧的母线结构和测量点行 波大小的影响,基于单端线模行波极性正确识别第2个反向行波是故障点反射波还是对端母线反 射波非常困难。针对此问题,提出了不受线路两侧母线结构影响的第2个反向行波识别新原理,若 第2个到达测量点的反向行波中零模与线模行波极性相同,则为故障点反射波;若零模与线模行波 极性相反,则为从故障点透射过来的对端母线反射波,大量EMTP仿真证明了此原理清晰、可靠, 方法有效、正确。
Identification of traveling wave reflected by fault point or by bus at remote end is the core of traveling wave based distance protection and fault location based on single-end traveling wave. However, when single-phase-to-ground fault occurs in the three-phase transmission lines, the polarity of traveling waves is affected by the configuration of buses at both ends of protected lines and traveling waves obtained at measurement. In this case, it is difficult to identify if the second reverse traveling wave is reflected from fault point or the bus at the remote end. This paper presents a new principle based on the polarity relation of zero module and line module of the second reverse direction traveling waves, which is independent of the configuration of buses. If the relation of zero module and line module is the same, the traveling wave is reflected from the fault point; otherwise, from the bus at the remote end. EMTP simulation shows that the principle is correct and reliable.
出处
《电力系统自动化》
EI
CSCD
北大核心
2006年第1期41-44,59,共5页
Automation of Electric Power Systems
基金
国家自然科学基金资助项目(50377019)。~~
关键词
行波
单相接地故障
输电线路
行波极性
traveling wave
single-phase-to-ground fault
transmission line
polarity of traveling wave
作者简介
施慎行（1978-），男，博士研究生，研究方向为电力系统故障分析及继电保护。E—mail：ssx99@mails．tsinghua．edu．cn
董新洲（1963-），男，教授，研究方向为继电保护以及小波分析在电力系统中的应用。E-mail：xzdong@tsinghua．edu．cn
周双喜（1941-），男，教授，博士生导师，长期从事电力系统分析和控制以及电压稳定的研究。
