高压电器2025，Vol.61Issue(2)：120-129,10.DOI:10.13296/j.1001-1609.hva.2025.02.014
35kV XLPE电缆导体尖刺缺陷损耗电流谐波特征分析
Analysis of Harmonic Characteristics of Conductor Spike Defect Loss Current in 35 kV XLPE Cable
摘要
Abstract
For studying the harmonic component characteristics of the loss current in case of conductor spike defect in the 35 kV XLPE cable,the simulation model of the conductor spike defect of 35 kV XLPE cable is constructed based on the theory of jump conductance in this paper,the influence of radius of spike curvature,the location of the spike and electrode distance on the loss current harmonic characteristic is simulated and analyzed.Then,a sample of conductor spike defect in 35 kV XLPE cable is made,and the verification experiment under the condition of radius of spike curvature at 30 mm,spike at the shielding layer and the electrode spacing of 3 mm is performed.Both simula-tion and experimental results show that in case of conductor spike defect in the 35 kV XLPE cable,the distorted high strength electric filed at the defect place will make the conductivity characteristics of the XLPE to generate periodic fluctuation with alternating AC voltage,causing distortion of the waveform of the loss current and superposition of high-order harmonic components.From the perspective of harmonic components,the significant 3rd and 5th harmon-ic components in the loss current are existed.The severity of defects varies depending on their locations,and the con-tribution rates of 3rd and 5th harmonics are also different.The harmonic distortion rate of loss current and conductivi-ty distortion rate of the conductance are inversely proportional to the curvature radius of the spikes and the electrode spacing,and the distortion rates of both are higher when the spikes are located in the wire core than when they are lo-cated in the shielding layer.关键词
XLPE电缆/绝缘缺陷/交流损耗电流/绝缘电导特性/谐波分析/绝缘诊断Key words
XLPE cable/insulation defect/AC loss current/insulation conductivity characteristics/harmonic analysis/insulation diagnose引用本文复制引用
李伟,赵岩,姚维为,郑书生,李乐颖,唐志国,胡德鹏,齐波..35kV XLPE电缆导体尖刺缺陷损耗电流谐波特征分析[J].高压电器,2025,61(2):120-129,10.基金项目
中国长江三峡集团有限公司科研项目资助(202103368).Project Supported by Scientific Research Project of China Three Gorges Corporation(202103368). （202103368）
