基于沿线行波突变的双回线路单端测距  

Single Ended Fault Location of Double Circuit Lines Based on Traveling Wave Saltation Along the Line

作　　者：束洪春[1] 宋晶 田鑫萃[1] SHU Hongchun;SONG Jing;TIAN Xincui(Faculty of Electric Power Engineering,Kunming University of Science and Technology,Kunming 650051,Yunnan Province,China)

机构地区：[1]昆明理工大学电力工程学院

出　　处：《中国电机工程学报》2019年第19期5793-5804,共12页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51667010,51807084)~~

摘　　要：单端行波测距的关键是故障点反射波(对端母线反射波)的辨识,而传统的行波测距仅利用了故障行波到达量测端的一维时刻信息,对于富含干扰的实测故障行波数据,故障行波不易检测辨识。基于此,将双回线路的反向量电流行波波到时刻的一维的信息映射到沿线长维度上正向行波与反向行波形成的突变,根据行波突变点与故障位置的关系以及所满足的时间约束和长度约束,辨识出反映故障位置和反映对偶位置的突变点,进而得到故障距离。大量的实测数据表明:该测距算法受量测端健全线路末端反射波影响的范围小于传统单端行波测距,且由故障信号本身构造"检测函数"可以适应不同的故障条件,更易辨识出故障行波,实现双回线路单端自动化行波测距。The key of single ended traveling wave location is the identification of the reflected wave of fault point(or the reflected wave of end bus), The traditional traveling wave fault location method only uses the one dimension time information which caused by fault traveling wave, and the fault traveling wave is not easy to detect and identify for the traveling wave data which is rich in the interfere. The one-dimensional information of fault traveling wave in time domain of the reverse current wave for double circuit lines is mapped to the abrupt change caused by superposition of forward traveling wave and backward traveling wave. According to the relationship between the saltation point and the fault location, and the time constraints and length constraints satisfied, the saltation points that reflect the position of the fault and reflect the dual position were identified, and the fault location result was obtained. A large number of measured data show that: The range affected by the reflected wave from the sound line positioned the measuring end of the fault location algorithm is less than the traditional single end traveling wave algorithm, and the "detection function" can be adapted to different fault conditions by the fault signal itself, so the fault traveling wave can be identified more easily, and the single end automatic traveling wave fault location for double circuit lines is realized.

关 键 词：双回线路 单端测距 方向行波 突变点 反向量行波 测距函数 

分 类 号：TM77[电气工程—电力系统及自动化]