文章摘要
高压电缆缓冲层轴向沿面烧蚀故障机理分析
Analysis of Axial Ablation Failure Mechanism of Buffer Layer of High Voltage Power Cable
投稿时间:2019-09-05  修订日期:2020-01-14
DOI:
中文关键词: 电缆  缓冲层  波纹铝护套  烧蚀  故障
英文关键词: cable  buffer layer  corrugated aluminum sheath  ablation  fault
基金项目:国家电网有限公司科技项目“电力电缆潜伏性隐患检测防护与产品施工质量评价技术研究”
作者单位E-mail
张静 国网电力科学研究院武汉南瑞有限责任公司 narizhangjing@foxmail.com 
王伟 国网电力科学研究院 江苏省南京市  
徐明忠 中国电力科学研究院  
宋鹏先   
李文杰   
欧阳本红   
摘要点击次数: 101
全文下载次数: 96
中文摘要:
      为了对运行电压下电缆缓冲层轴向沿面烧蚀故障机理进行研究,本文搭建了电力电缆等值电路,根据110kV XLPE电缆结构及实际尺寸,计算了电缆发生放电现象时对电缆金属护套与绝缘外屏蔽脱离长度的要求。结果表明:缓冲层电阻率对脱离长度影响显著,降低缓冲层电阻率可增加允许脱离长度,当电阻率达到105Ω?mm以下时,允许的脱离长度达1186mm,不易发生轴向沿面放电,此外,允许纵向电压及缓冲层结构尺寸也是控制缓冲层缺陷的特征参数。#$NL关键词:电缆;缓冲层;波纹铝护套;烧蚀;故障#$NL中图分类号:请作者自查
英文摘要:
      In order to study the mechanism of axial ablation failure of cable buffer layer under operating voltage,, the equivalent circuit of power cable was constructed. According to the structure and actual size of 110 kV XLPE cable, the requirement of cable metal sheath and insulating shield separation length when cable discharges was calculated. The results shown that the buffer layer resistivity had a significant effect on the detachment length. Reducing the buffer layer resistivity can increase the allowable detachment length. When the resistivity reaches 105Ω?mm, the allowable detachment length was 1186 mm. In addition, the allowable voltage of the buffer layer and the structure size of the buffer layer were also the characteristic parameters to control the fault of the buffer layer.
查看全文   查看/发表评论  下载PDF阅读器
关闭