应用于环形电网故障定位的新型双端行波测距法  

A New Two-terminal Traveling Wave Ranging Method Applied in Ring Power Grid Fault Location

作　　者：张静[1] 高鹏飞 ZHANG Jing;GAO Peng-fei(Jinling Institute of Technology,Nanjing 211169,China)

机构地区：[1]金陵科技学院机电工程学院,江苏南京211169

出　　处：《金陵科技学院学报》2023年第2期23-30,共8页Journal of Jinling Institute of Technology

基　　金：江苏省自然科学基金资助项目(BK20150115);国家自然科学基金面上项目(41876096)。

摘　　要：对环形电网的故障进行快速准确定位是电网稳定运行的重要保障。对环形电网故障行波特征进行分析,通过小波变换结合新型行波双端测距法,对故障行波进行定位分析。采用仿真分析软件搭建环形电网模型,利用故障时三相电流行波的模值特征判别故障类型,确定故障最终位置。仿真结果显示,新型行波双端测距法相较于传统故障行波分析法降低了对波速的依赖,且不受线路参数变化的影响,减小了故障测距的误差,提高了环形电网中故障点定位的准确性。Fast and accurate fault location is the important indicator of stable power grid operation.This paper analyzes the characteristics of fault travelling wave in the ring power grid,and locates the fault travelling wave by wavelet transform and new travelling wave two-terminal ranging method.Simulation analysis software is used to build a ring power grid model,and the fault type is determined by the mode characteristics of the three-phase current wave when the fault occurs.And the final fault location is determined.The simulation results show that compared with traditional fault travelling wave analysis method,the new two-terminal ranging method reduces the dependence on wave velocity,and it is not affected by the change of line parameters.It reduces the error of fault ranging and improves the accuracy of fault location in the ring power grid.

关 键 词：故障行波 双端测距法 环形电网 小波变换 

分 类 号：TM773[电气工程—电力系统及自动化]