110kV海底电缆的XLPE绝缘气隙缺陷电场有限元分析
Electric Field Finite Element Analysis of XLPE Insulation Air Gap Defect of 110 kV Submarine Cable
徐丽红 1林智炳 1吕安强 2于晓霜3
作者信息
- 1. 国网福建省电力有限公司莆田供电公司,福建 莆田 351100
- 2. 华北电力大学电子与通信工程系,河北 保定 071003;华北电力大学河北省电力物联网技术重点实验室,河北 保定 071003
- 3. 华北电力大学河北省电力物联网技术重点实验室,河北 保定 071003
- 折叠
摘要
为了分析海底电缆绝缘气隙缺陷电场的分布情况,建立了海底电缆绝缘层同一径向、不同位置处气隙缺陷的电场有限元模型.利用Maxwell瞬态电场分析法计算出海底电缆正常运行、气隙缺陷时绝缘层和气隙内的电场分布并进行对比分析,得出了在存在气隙缺陷下,绝缘内侧电场最大值以及气隙缺陷内电场最大值与气隙缺陷位置的关系函数.结果表明,海底电缆在出现气隙缺陷时,绝缘内侧电场强度最大,且大于气隙缺陷内电场,绝缘内侧和气隙缺陷内的电场最大值与气隙径向位置呈单调递减关系.
Abstract
In order to analyze the distribution of electric field of air-gap defects in submarine cable insulation,a finite ele-ment model of electric field of air-gap defects in the same radial direction and at different positions of submarine cable insu-lation layer is established in this paper.Maxwell transient electric field analysis method was used to calculate the electric field distribution in the insulation layer and the air gap during the normal operation of submarine cable and the air gap defect,and then the electric field distribution in the insulation layer and the air gap defect were compared and analyzed,and the relation function between the maximum electric field inside the insulation and the maximum electric field inside the air gap defect and the position of the air gap defect was obtained.The results showed that when there were air gap defects in submarine cables,the elec-tric field inside insulation reached the largest,which was larger than the electric field inside air gap defects.The maximum electric field inside insulation and air gap defects was monotonically decreasing with the radial position of air gap.
关键词
海底电缆/绝缘气隙/局部放电/有限元/电场强度Key words
submarine cable/insulation air gap/partial discharge/finite element/electric field strength引用本文复制引用
出版年
2024
NETL
NSTL
万方数据