高电压技术2023，Vol.49Issue(12)：4919-4928,10.DOI:10.13336/j.1003-6520.hve.20230044
高压电缆铝套结构与缓冲层烧蚀特性
Ablative Properties of Buffer Layer in Aluminum Sheath Structure of High Voltage Cable
摘要
Abstract
In recent years,the buffer layer ablation failure has occurred many times in the operation of corrugated alu-minum sheath structure HV XLPE cable.The electrical contact with buffer layer of flat aluminum sheath is better than that of corrugated aluminum sheath,whether it has better performance in inhibiting the ablative failure of buffer layer is a problem that is worth studying.In this paper,considering the influence of gravity,based on the ablation mechanism of ra-dial current concentrated,the two structures are compared and analyzed by finite element simulation and simulation ablation experiments.The results show that the contact area between the flat aluminum sheath and the buffer layer under the influence of gravity is larger than that between the corrugated aluminum sheath and the buffer layer.The concentrated radial current caused by the bad contact is dispersed,and the temperature rise of the buffer layer is effectively reduced.Under the test current condition of 100 mA,the buffer layer temperature of corrugated aluminum sheath structure exceeds 278℃,and even the insulation shield is burned,while the buffer layer temperature of flat aluminum sheath structure is only 74 ℃.Compared with the corrugated aluminum sheath structure,the flat aluminum sheath structure has an ad-vantage in inhibiting the ablation of buffer layer.关键词
XLPE电缆/缓冲层烧蚀/平铝套/皱纹铝套/重力影响Key words
XLPE cable/buffer layer ablation/flat aluminum sheath/corrugated aluminum sheath/influence of gravity引用本文复制引用
冯尧,邓显波,李文杰,赵健康,王安哲..高压电缆铝套结构与缓冲层烧蚀特性[J].高电压技术,2023,49(12):4919-4928,10.基金项目
国家电网有限公司科技项目(5500-202048063A-0-0-00).Project supported by Science and Technology Project of SGCC(5500-202048063A-0-0-00). （5500-202048063A-0-0-00）
