Physical and Chemical Analysis and Simulation Study on Discharge Burn Defect of Buffer Layer in 110 kV XLPE Cable

ZHANG Weiwei; YAN Youxiang; WANG Lei; CUI Jian; YUE Zhenguo; JIN Jinyuan; YANG Zhipeng

doi:10.13296/j.1001-1609.hva.2020.05.024

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Physical and Chemical Analysis and Simulation Study on Discharge Burn Defect of Buffer Layer in 110 kV XLPE Cable

更新时间：2025-04-26

- Physical and Chemical Analysis and Simulation Study on Discharge Burn Defect of Buffer Layer in 110 kV XLPE Cable
- High VoltageApparatus Vol. 56, Issue 5, Pages: 155-162(2020)
- 作者机构：
  
  1. 厦门理工学院
  2. 国网浙江绍兴市上虞区供电有限公司
  3. 国网福建省电力有限公司厦门供电公司
  4. 浙江晨光电缆股份有限公司
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2020.05.024
  CLC： TM75
- Published：2020
- 稿件说明：
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[1]张玮玮,严有祥,王蕾,崔建,岳振国,金金元,杨智鹏.110 kV XLPE电缆缓冲层放电灼伤问题的理化分析与仿真研究[J].高压电器,2020,56(05):155-162.

ZHANG Weiwei, YAN Youxiang, WANG Lei, et al. Physical and Chemical Analysis and Simulation Study on Discharge Burn Defect of Buffer Layer in 110 kV XLPE Cable[J]. High voltageapparatus, 2020, 56(5): 155-162.
[1]张玮玮,严有祥,王蕾,崔建,岳振国,金金元,杨智鹏.110 kV XLPE电缆缓冲层放电灼伤问题的理化分析与仿真研究[J].高压电器,2020,56(05):155-162. DOI： 10.13296/j.1001-1609.hva.2020.05.024.

ZHANG Weiwei, YAN Youxiang, WANG Lei, et al. Physical and Chemical Analysis and Simulation Study on Discharge Burn Defect of Buffer Layer in 110 kV XLPE Cable[J]. High voltageapparatus, 2020, 56(5): 155-162. DOI： 10.13296/j.1001-1609.hva.2020.05.024.

摘要

对110 kV及以上高压XLPE电缆线路改造时

频繁发现电缆缓冲层存在疑似放电灼伤缺陷

其原因尚无定论。为探究该缺陷是否为放电产生

文中首先对缺陷进行了形貌特征观察和元素成分表征

然后对阻水带电阻率进行测量

最后利用有限元软件对电缆进行三维电场仿真

研究了缓冲层间隙、阻水带电阻率、过电压等因素对缓冲层场强的影响。研究结果表明:缓冲层存在间隙、阻水带电阻率增大、过电压入侵等因素会使缓冲层场强增大

易造成缓冲层放电现象。

Abstract

In retrofitting high-voltage XLPE cable lines of 110 kV and above

suspected discharge burn defects were often found on the buffer layers

and the reason why the defects occured is still inconclusive.In order to explore whether these defects are due to discharge

this study firstly observed the morphology of the defects and analyzed their elemental composition

and then measured the resistivity of water-blocking tape.Finally

three-dimensional electric field simulation of the XLPE cable was carried out with a finite element software to obtain the effects of buffer layer gap

resistivity of water-blocking tape and overvoltage on the electric field strength of buffer layer.The results showed that presence of gap in buffer layer

higher resistivity of water-blocking tape

and intrusion of overvoltage all increased the electric field strength on the buffer layer and caused discharge of the buffer layer.

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