电测与仪表2024，Vol.61Issue(1)：157-163,7.DOI:10.19753/j.issn1001-1390.2024.01.024
配电电缆中受潮接头的阻抗特性及其检测方法研究
Study on impedance characteristics of moisture ingress in cable joint and its detection method
摘要
Abstract
Cable joint is one of the most vulnerable parts of power cables.Moisture ingress with joints is a common defect of medium-voltage cross-linked cables.If not repaired timely,it will develop into premature failure of cable.This paper studies the impedance characteristics after moisture ingress into cable joints and their detection method.The principle of refraction and reflection of wave propagation on power cable is briefly formulated.Based on the theoretical knowledge of time domain reflectometry(TDR),the three-dimensional model of single-core 10kV cold-shrinkable cable joint is estab-lished in the computer simulation technology(CST)Studio Suite to investigate the impedance characteristics and reflected waveforms of the joint under different moisture degrees.The moisture defects are made on the joint of the middle part of the 10 kV XLPE cable in the laboratory,and the S parameter measurement of joint and time-domain pulse reflectometry experiment are carried out respectively.The simulation and experimental results of impedance characteristics of moisture ingress on cable joint are analyzed and compared,which validates the feasibility and effectiveness of using TDR to diag-nose defected joints due to moisture ingress.关键词
电缆接头/进水受潮/阻抗特性/建模仿真/S参数/时域反射法Key words
cable joint/moisture ingress/impedance characteristics/modeling simulation/S parameter/TDR分类
信息技术与安全科学引用本文复制引用
林钰灵,徐澎磊,崔江静,吴宏晓,杨赛柯,李洪杰..配电电缆中受潮接头的阻抗特性及其检测方法研究[J].电测与仪表,2024,61(1):157-163,7.基金项目
国家自然科学基金资助项目(51877169) （51877169）
广东电网有限责任公司科技项目(GDKJXM20185371) （GDKJXM20185371）
