免疫波速影响的全并联A T牵引网多测点行波故障定位  

A Multi-Measurement-Point Traveling Wave Fault Localization for Fully Parallel AT Traction Network with Immune Wave Velocity Effect

作　　者：田开庆 樊宇航 TIAN Kai-qing;FAN Yu-hang(Faculty of Electrical Engineering,Kunming Railway Vocational and Technical College,Kunming 650208,China;Faculty of Electric Power Engineering,Kunming University of Science and Technology,Kunming 650051,China;Faculty of Architectural Engineering,Kunming University of Science and Technology Oxbridge College,Kunming 650106,China)

机构地区：[1]昆明铁道职业技术学院电气工程学院,云南昆明650208 [2]昆明理工大学电力工程学院,云南昆明650051 [3]昆明理工大学津桥学院建筑工程学院,云南昆明650106

出　　处：《电工电气》2025年第2期50-57,共8页Electrotechnics Electric

基　　金：云南省教育厅科学研究基金项目(2023J1920);昆明铁道职业技术学院科学研究基金项目(K202403Z)。

摘　　要：行波法故障测距应用于全并联自耦变压器(AT)供电方式牵引网时,存在波头辨识困难和波速不确定的问题。提出了一种免疫波速影响的全并联AT牵引网多测点行波故障定位方法。分析了AT所故障初始电流行波的特征,利用其幅值确定故障线,通过AT所故障线初始电流行波和初始电压行波的极性判断故障方向,结合判断出的故障方向信息,选用测距公式计算故障距离。PSCAD/EMTDC电磁暂态软件仿真结果表明,所提出的测距方法是可行的,且具有极高的鲁棒性和准确度。When applying the traveling wave method for fault location to fully parallel autotransformer(AT)traction networks,challenges such as wavefront identification difficulties and wave velocity uncertainty arise.This paper proposes a multi-measurement-point traveling wave fault location method for fully parallel AT traction networks that is immune to wave velocity effects.The characteristics of the initial fault current traveling waves at AT stations are analyzed,and the amplitude of these waves is utilized to identify the faulty line,while the polarities of the initial current and voltage traveling waves at the AT stations determine the fault direction.Based on the identified fault direction information,a ranging formula is employed to calculate the fault distance.Electromagnetic transient simulation results using PSCAD/EMTDC demonstrate the feasibility of the proposed method,showcasing high robustness and accuracy.

关 键 词：全并联自耦变压器 牵引网 行波法 故障测距 行波波速 

分 类 号：TM411.3[电气工程—电器] TM922.3