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新型暂态行波幅值比较式超高速方向保护
引用本文:邹贵彬,高厚磊,江世芳,徐丙垠.新型暂态行波幅值比较式超高速方向保护[J].中国电机工程学报,2009,29(7):84-90.
作者姓名:邹贵彬  高厚磊  江世芳  徐丙垠
作者单位:1. 山东大学电气工程学院
2. 山东科汇电气股份有限公司
基金项目:教育部博士点基金项目(20070422099)。
摘    要:针对传统行波保护可靠性低这一缺点,提出一种基于暂态行波幅值比较的新型超高速线路保护方案。该方案基于故障发生后一段时间内,正向行波幅值积分与反向行波幅值积分的比值来确定故障方向。若线路两端保护的判断结果均为正向故障,保护将发出跳闸命令。该文对保护的原理判据和影响行波方向保护的主要因素分别进行了仿真分析,PSCAD/EMTDC仿真结果表明,所提方案能够快速、可靠地识别线路区内外故障,其性能基本不受故障电阻、故障时刻、母线或线路接线方式等的影响,该保护原理清晰,实现简单,具有良好的工程应用前景。

关 键 词:行波保护  可靠性  幅值比较  超高速  方向保护
收稿时间:2008-04-30
修稿时间:2008-07-28

Novel Transient Travelling Wave Based Amplitude Comparison Ultra High Speed Directional Protection
ZOU Gui-bin,GAO Hou-lei,JIANG Shi-fang,XU Bing-yin.Novel Transient Travelling Wave Based Amplitude Comparison Ultra High Speed Directional Protection[J].Proceedings of the CSEE,2009,29(7):84-90.
Authors:ZOU Gui-bin  GAO Hou-lei  JIANG Shi-fang  XU Bing-yin
Affiliation:1. School of Electrical Engineering, Shandong University
2. Shandong Kehui Electrical Co. Ltd.
Abstract:To improve the reliability of conventional protection using travelling wave, a novel transient travelling wave based amplitude comparison ultra high speed directional protection was proposed. The amplitudes of forward and backward travelling wave caused by a fault were integrated respectively within a short time after fault. The fault direction was determined by the ratio of the integral values. If two relays at the ends of a line detect a fault to be in the forward direction, a trip order will be issued. Theoretical criterion and main factors influencing the performance of travelling wave protection were simulated and analyzed. The EMTDC simulation results demonstrate that the proposed scheme can discriminate a fault as internal or external rapidly and reliably, and its performances are immune to fault resistances, fault inception angles, structures of line or busbar, etc. The protection scheme is simple and feasible.
Keywords:travelling wave protection  reliability  amplitude comparison  ultra high speed  directional protection
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