基于分布参数模型的互联电力系统输电线路故障定位  

Distributed Parameter Model⁃Based Fault Location Method for Transmission Lines in Interconnected Power Systems

作　　者：刘晓琴[1] 李强[1] 孙海军[1] 刘璐 Liu Xiaoqin;Li Qiang;Sun Haijun;Liu Lu(School of Information and Control Engineering,Liaoning Shihua University,Fushun Liaoning 113001,China)

机构地区：[1]辽宁石油化工大学信息与控制工程学院,辽宁抚顺113001

出　　处：《辽宁石油化工大学学报》2020年第3期91-98,共8页Journal of Liaoning Petrochemical University

基　　金：辽宁省教育厅科学研究经费项目(L2019007)。

摘　　要：提出了一种适用于含n母线的通用互联电力系统架空输电线路单端故障定位方法。对故障输电线路采用高精确度的分布参数模型,而对电力系统则采用考虑其内部连接特性的二端口戴维宁等效网络模型,从而实现较高的故障定位精度。利用MATLAB/simulink仿真平台模拟11母线互联电力系统,获得暂态故障数据并进行了测试。测试结果表明,对各种故障条件下的故障距离估计精度高,对近端母线阻抗误差敏感,而对远端母线阻抗误差不敏感。A single terminal fault location method for overhead transmission lines in general interconnected power system with n⁃bus was proposed.High accuracy in fault location was achieved by using both an accurate distributed parameters model for the faulted transmission line,and a two⁃bus Thevenin equivalent network model for the power system that accurately accounted for its inter connectivity.The method was tested by using transient fault data obtained from MATLAB simulations of an 11⁃bus interconnected power system.The results show that the method is capable of estimating the fault distance with high accuracy for various fault conditions.And it is sensitive to errors in the value of the local bus impedance,but insensitive to errors in the value of the remote bus impedance.

关 键 词：故障定位 输电线路 分布参数 单端测量 电力系统 

分 类 号：TM77[电气工程—电力系统及自动化]