摘要
高压交联聚乙烯电缆因缓冲层缺陷引发的故障频发,已严重威胁到电力系统的安全运行。本文首先介绍了缓冲层的基本结构和作用,并在此基础上梳理了目前国内外对于缓冲层失效的相关研究;其次从缓冲层的材料特征和内部结构等角度结合电场仿真来分析缺陷发生的主要原因;之后对缓冲层缺陷中出现的白色粉末绝缘性能和理化特征进行总结,并提出其形成机理;最后对缓冲层缺陷的检测手段进行汇总,提出使用计算机断层成像技术对电缆缓冲层缺陷进行检测以弥补现有检测手段的不足,并建议对铝护套及缓冲层的材料或结构进行优化,以预防缓冲层缺陷的生成。
The frequent faults caused by buffer layer defects in high-voltage cross-linked polyethylene cables have seriously threatened the safe operation of power system.In this paper,the basic structure and function of buffer layers was introduced at first,and the relevant research on buffer layer failure at home and abroad were summarized.Secondly,the main reason of buffer layer defects was analyzed through electric field simulation from the material characteristic and internal structure of buffer layers,and the insulating properties and physicochemical characteristics of the white powder in buffer layer were summarized to propose its formation mechanism.Finally,the detection methods of buffer layer defects were summarized,it is proposed to use computer tomography technology to detect cable buffer layer defects to make up for the shortcomings of existing detection methods,and it is recommended to optimize the materials or structures of aluminum sheaths and buffer layers to prevent the generation of buffer layer defects.
作者
邱玮
章宇聪
谢亿
曹先慧
刘维可
胡俊
李湘珺
QIU Wei;ZHANG Yucong;XIE Yi;CAO Xianhui;LIU Weike;HU Jun;LI Xiangjun(College of Energy and Power Engineering,Changsha University of Science&Technology,Changsha 410114,China;State Grid Hunan Electric Power Corporation Research Institute,Changsha 410007,China;Hunan Xiangdian Boiler and Pressure Vessel Inspection Center Co.,Ltd.,Changsha 410208,China)
出处
《绝缘材料》
CAS
北大核心
2024年第4期13-21,共9页
Insulating Materials
基金
国网湖南省电力有限公司资助项目(B316A520000T)
国家级大学生创新创业训练计划项目(202210536024)。
关键词
高压电缆
交联聚乙烯
缓冲层缺陷
计算机断层成像
平滑铝护套
high voltage cables
crosslinked polyethylene
buffer layer defects
computed tomography
smooth aluminum sheath
