电力系统及其自动化学报2023，Vol.35Issue(12)：71-79,9.DOI:10.19635/j.cnki.csu-epsa.001133
矿用电缆单相接地故障行波特性及测距方法研究
Research on Travelling Wave Characteristics of Mining Cable Under Single-phase Grounding Fault and the Corresponding Fault Location Method
摘要
Abstract
To improve the location accuracy of mining cable,a fault location method using travelling wave injected be-tween the cable core and shielding layer is proposed.First,the multilayer structure of cable is introduced,and the dis-tribution of transition resistance under grounding fault is analyzed.Second,the electromagnetic characteristics of travel-ling wave with an incident pulse are analyzed and verified.Third,based on the electromagnetic characteristics of inci-dent pulse,the refraction and reflection coefficients of travelling wave are analyzed,the amplitude characteristics of re-flected pulse in two different pulse injection modes are explored,and the fault location method based on the shielding layer of cable is proposed.In addition,the validity and correctness of the proposed method were verified on the PSCAD/EMTDC simulation platform.Results show that when using the travelling wave injection method of cable core and shield-ing layer,the measured reflected pulse amplitude was larger,and the accuracy of reflected pulse identification and fault location was higher.关键词
安培环路定律/故障测距/行波法/电磁特性/屏蔽层/反射脉冲Key words
Ampere's loop law/fault location/travelling wave method/electromagnetic characteristics/shielding lay-er/reflected pulse分类
信息技术与安全科学引用本文复制引用
金磊,于景斌,李强,杜勇志,杨晓伟,张洋..矿用电缆单相接地故障行波特性及测距方法研究[J].电力系统及其自动化学报,2023,35(12):71-79,9.基金项目
国家能源集团项目(基于多频波形解析计算的电缆故障快速定位装置研究) （基于多频波形解析计算的电缆故障快速定位装置研究）
