Ablation Mechanism Analysis on Metal Sheath of High Voltage XLPE Insulated Power Cable

ZHOU Songlin; LIU Ruoxi; JIANG Lei; LIU Hongliang; LI Huachun; REN Zhigang; XIN Yue; ZHONG Lisheng; GAO Jinghui

doi:10.13296/j.1001-1609.hva.2020.12.023

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Ablation Mechanism Analysis on Metal Sheath of High Voltage XLPE Insulated Power Cable

更新时间：2025-04-26

- Ablation Mechanism Analysis on Metal Sheath of High Voltage XLPE Insulated Power Cable
- High VoltageApparatus Vol. 56, Issue 12, Pages: 171-176(2020)
- 作者机构：
  
  1. 国网北京市电力公司
  2. 西安交通大学电力设备电气绝缘国家重点实验室
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2020.12.023
  CLC： TM75
- Published：2020
- 稿件说明：
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[1]周松霖,刘若溪,姜磊,刘宏亮,李华春,任志刚,辛月,钟力生,高景晖.高压XLPE绝缘电力电缆护层烧蚀机理分析[J].高压电器,2020,56(12):171-176.

ZHOU Songlin, LIU Ruoxi, JIANG Lei, et al. Ablation Mechanism Analysis on Metal Sheath of High Voltage XLPE Insulated Power Cable[J]. High voltageapparatus, 2020, 56(12): 171-176.
[1]周松霖,刘若溪,姜磊,刘宏亮,李华春,任志刚,辛月,钟力生,高景晖.高压XLPE绝缘电力电缆护层烧蚀机理分析[J].高压电器,2020,56(12):171-176. DOI： 10.13296/j.1001-1609.hva.2020.12.023.

ZHOU Songlin, LIU Ruoxi, JIANG Lei, et al. Ablation Mechanism Analysis on Metal Sheath of High Voltage XLPE Insulated Power Cable[J]. High voltageapparatus, 2020, 56(12): 171-176. DOI： 10.13296/j.1001-1609.hva.2020.12.023.

摘要

文中针对某110 kV电缆护层烧蚀故障案例进行了分析

在综合考虑烧蚀点形貌、电缆结构及其运行环境后

提出了缓冲层与皱纹铝护套之间存在不良接触、金属护层上存在感应电压是造成电缆护层烧蚀的主要原因。在此基础上

建立了110 kV电缆电场仿真模型

设计了皱纹铝护套模型试样并开展了烧蚀模拟实验

分别验证了上述两种原因的合理性。为探究皱纹铝护层起始放电条件

明确放电规律

对模型试样在不同间隙下的起始放电电压进行了测试

测试结果进一步论证了上述烧蚀机理。文中工作能够为电缆设计及电缆故障分析提供有效指导。

Abstract

In this paper

a case of 110 kV cable fault is analyzed.After investigating ablation morphology

cable structure and its operating environment

the causes of ablation

such as the bad connect between buffer layer and corrugated aluminum（Al） sheath as well as the inductive voltage on metal sheath

are put forward.To verify the reasonableness of the above two causes

a simulation model of 110 kV cable is established

a model sample of corrugated A1 sheath is designed and an ablation simulation experiment is carried out.For further exploring the A1 sheath discharge condition and law

the initial discharge voltage of the model sample under different gaps is tested

which further demonstrates the above ablation mechanism.The research results of this paper can provide an effective guide for cable design and fault analysis.

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