煤矿电缆故障行波衰减特性及影响故障测距精度的因素  

Characteristics of Faults Traveling Wave Attenuation in Coal Mine Cable and Factors Affecting Fault Distance Measurement Accuracy

作　　者：吕向阳 LV Xiangyang(Power Supply Branch,Shanxi Jincheng Anthracite Coal Mining Group Co.,Ltd.,Jincheng,Shanxi 048000,China)

机构地区：[1]晋能控股装备制造集团有限公司供电分公司,山西晋城048000

出　　处：《自动化应用》2025年第3期135-137,141,共4页Automation Application

基　　金：晋能控股装备制造集团有限公司科技项目“煤矿6 kV接地定位系统研究”(JMJS-JSKF-2015-0027)。

摘　　要：行波衰减特性和故障初始条件是影响行波故障测距精度的重要因素。首先,利用PSCAD/EMTDC建立了煤矿电缆故障仿真模型,给出了行波传播衰减模型的数学描述;其次,研究了行波时频特征参数与行波在煤矿电缆中传播距离的关系;最后,分析了不同故障初始条件对煤矿电缆行波测距结果的影响。研究表明,行波振幅比、波头时间比等参数与行波传输距离呈二次函数关系。行波传播距离对故障测距结果存在一定影响,而故障电阻对测距结果影响较小。The attenuation characteristics of traveling waves and the initial conditions of faults are important factors affecting the accuracy of traveling wave fault location.Firstly,a simulation model for coal mine cable faults was established using PSCAD/EMTDC,and a mathematical description of the traveling wave propagation attenuation model was provided.Secondly,the relationship between the time-frequency characteristic parameters of traveling waves and the propagation distance of traveling waves in coal mine cables was studied.Finally,the influence of different initial fault conditions on the traveling wave distance measurement results of coal mine cables was analyzed.Research has shown that parameters such as the amplitude ratio and wavefront time ratio of traveling waves have a quadratic relationship with the transmission distance of traveling waves.The propagation distance of traveling waves has a certain impact on the fault distance measurement results,while the fault resistance has a relatively small impact on the distance measurement results.

关 键 词：煤矿电缆 故障行波 衰减 故障测距 

分 类 号：TM711[电气工程—电力系统及自动化]