10 kV自闭/贯通线模量波速时间差单端行波故障测距  

Modulus Wave Speed Time Difference based Single-end Traveling Wave Fault Location for 10 kV Automatic Blocking/Through Power Line

作　　者：邢志杰 宋金川 田行军[2] 姚琪 XING Zhijie;SONG Jinchuan;TIAN Xingjun;YAO Qi

机构地区：[1]天津凯发电气股份有限公司 [2]石家庄铁道大学

出　　处：《电气化铁道》2020年第2期9-13,共5页Electric Railway

基　　金：北京铁路局科研项目(2016CGDHS06);朔黄铁路供电系统整定与试验管理系统研究项目(CSIEZB170205059)。

摘　　要：铁路10 kV自闭/贯通线路属于典型的电缆-架空线混合连接线路,其故障定位的主要方法是行波法。双端行波法对两侧时钟同步有着严格的要求,传统单端行波法又难以适用于多段电缆-架空线混合线路。根据同一故障点产生的故障行波可以分为线模、零模分量,而2种模量行波的波速不同,到达的时刻必然不同,可将混合线路按照不同波阻抗进行分段,以零模、线模行波到达同一测量端时间差为自变量,推导出基于模量波速时间差的混合线路行波故障测距分段距离计算式。该方法只需利用单端行波信息便可准确计算故障距离,单相接地故障的仿真结果验证了该方法的有效性与可靠性。The railway 10 kV automatic blocking/power through line is a typical cable-overhead hybrid connection lines,its method for fault location is mainly by the traveling wave method.The double-ended traveling wave method has strict requirements for the synchronization of clocks on both sides,and the traditional single-ended traveling wave method is difficult to be applied to the multi-segment cable-overhead hybrid lines.Since the fault traveling wave generated in the same faulty point can be divided into an aerial mode and a zero mode component,the arrival time of the two modulus traveling waves must be different due to their different wave speeds,therefore,the hybrid line can be divided depending on different wave impedance,with the difference of arrival times between the zero mode and aerial mode traveling waves as the independent variable to deduct the calculation formulae of segment distance of modulus wave speed time difference based traveling wave fault location for hybrid line.The method is able calculate accurately the fault distance by only application of single-end traveling wave.The effectiveness and reliability of the method has been verified by results of the single-phase earthing fault simulation.

关 键 词：自闭/贯通线 混合线路 故障定位 单端 线模、零模 时间差 

分 类 号：TM721.3[电气工程—电力系统及自动化]