基于正序分量的多端输电线路精确故障定位研究  

Research on Accurate Fault Location for Multi-Terminal Transmission Lines Based on Positive Sequence Components

作　　者：刘瑞麟 邰能灵[1] 范春菊[1] 黄文焘[1] 刘志远 LIU Ruilin;TAI Nengling;FAN Chunju;HUANG Wentao;LIU Zhiyuan(School of Electronic Information and Electrical＇Engineering,Shanghai JiaoTong University,Minhang District,Shanghai 200240,China)

机构地区：[1]上海交通大学电子信息与电气工程学院

出　　处：《电网技术》2018年第9期3033-3040,共8页Power System Technology

基　　金：国家重点研发计划项目(2016YFB0900601);国家自然科学基金项目(51377104)~~

摘　　要：针对目前多端线路故障定位中分支接点附近测距死区较大的问题,提出一种基于正序分量的精确故障定位新方法。该方法不以数值范围作为故障判别依据,而是采用双端方程有解和无解两种对立状态实现故障支路的判别,从而有效减小分支接点附近测距死区的范围。在求解过程中,同时实现故障支路判别与故障测距,无需事先判别故障支路。新方法定位及测距结果不受故障类型、过渡阻抗及系统运行方式等的影响。PSCAD仿真结果,验证了所提算法的正确性、有效性和高精度性。For the problem of the relatively large dead zone near the branch contacted node, a fault location algorithm based on positive sequence fundamental components proposed in this paper. The algorithm does not use the numerical range as the fault detection basis but uses the two opposing states, which are the equation of two-terminal transmission lines having a solution or no solution, as the basis for discrimination to achieve detection of faulty branch. Thus,the algorithm can effectively reduce the range of dead zone near the branch contacted node. In addition, this algorithm realizes the fault branch identification and fault location at the same time. This algorithm not affected by the fault type, transition impedance and system impedance. The simulation results of PSCAD have verified the correctness, validity and accuracy of the proposed algorithm.

关 键 词：故障定位 正序基波分量 测距死区 虚拟故障点 抽象双端线路 判别矩阵 

分 类 号：TM721[电气工程—电力系统及自动化]