Investigation of Partial Discharge Characteristics of Typical Defects in XLPE Cable Under AC Voltages

DU Hao; GUAN Honglu; JIANG Chen; CHEN Xiangrong; ZHOU Hao; CAO Junping; WANG Shaohua

doi:10.13296/j.1001-1609.hva.2020.12.022

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Investigation of Partial Discharge Characteristics of Typical Defects in XLPE Cable Under AC Voltages

更新时间：2025-04-26

- Investigation of Partial Discharge Characteristics of Typical Defects in XLPE Cable Under AC Voltages
- High VoltageApparatus Vol. 56, Issue 12, Pages: 164-170(2020)
- 作者机构：
  
  1. 浙江大学电气工程学院浙江省电机系统智能控制与变流技术重点实验室
  2. 浙江省电力公司电力科学研究院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2020.12.022
  CLC： TM247;TM855
- Published：2020
- 稿件说明：
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[1]杜浩,关弘路,蒋琛,陈向荣,周浩,曹俊平,王少华.交流电压下交联聚乙烯电缆典型缺陷局部放电特性研究[J].高压电器,2020,56(12):164-170.

DU Hao, GUAN Honglu, JIANG Chen, et al. Investigation of Partial Discharge Characteristics of Typical Defects in XLPE Cable Under AC Voltages[J]. High voltageapparatus, 2020, 56(12): 164-170.
[1]杜浩,关弘路,蒋琛,陈向荣,周浩,曹俊平,王少华.交流电压下交联聚乙烯电缆典型缺陷局部放电特性研究[J].高压电器,2020,56(12):164-170. DOI： 10.13296/j.1001-1609.hva.2020.12.022.

DU Hao, GUAN Honglu, JIANG Chen, et al. Investigation of Partial Discharge Characteristics of Typical Defects in XLPE Cable Under AC Voltages[J]. High voltageapparatus, 2020, 56(12): 164-170. DOI： 10.13296/j.1001-1609.hva.2020.12.022.

摘要

文中采用实际运行中的电缆

制作了3种典型模型缺陷

利用脉冲电流法研究不同外施电压下3种典型缺陷的局部放电特性

根据不同外施电压下典型缺陷的局部放电相位分布图谱

提取3个局部放电特征量并绘制趋势图。结果表明

在依据文中缺陷制作方法和试验过程的条件下

断口缺陷的起始放电电压最低

放电图谱具有明显的不对称性;气隙缺陷起始放电电压最高

其放电随着外施电压的升高逐渐转移到1、3象限;尖刺缺陷负半周放电呈"Г"型。3种缺陷的特征量随外施电压升高存在不同的变化趋势

其中尖刺缺陷局部放电相位宽度最大

3种缺陷的平均放电量均随外施电压的升高而增加

断口缺陷和气隙缺陷的放电重复率随外施电压的升高而增加

尖刺缺陷的放电重复率随外施电压的升高而减小

表明提取的特征量可作为电缆典型缺陷模式识别的特征参考量。

Abstract

In this paper

three typical model defects were fabricated by using operated cables.Partial discharge（PD）characteristics of the three typical defects at different applied voltages were studied by a pulse current method.According to phase-resolved PD patterns of the typical defects at different applied voltages

three PD feature quantities were extracted and trend graphs were obtained.Based on the defects fabrication method and test process in this paper

the results showed that the fracture defect had the lowest PD initiation voltage（PDIV）

discharge patterns were obviously asymmetrical.The PDIV of the void defect was the highest

the discharge gradually shifted to the first and third quadrants with an increase of the applied voltage.The negative half-cycle discharge of the needle defect was "Γ" type.The characteristic quantities of the three typical defects presented different trends with the increase of the applied voltage.The PD width of the needle defect was the largest

whereas average discharges of the three typical defects increased with the increase of the applied voltage.The discharge repetition rate of the fracture defects and void defects increased with the increase of the applied voltage

but the discharge repetition rate of the needle defect decreased with the increase of the applied voltage.This indicated that the extracted feature quantities could be used as the characteristic reference quantities for the pattern recognition of the cable typical defects.

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