摘要
在交联聚乙烯(XLPE)电缆的服役过程中,由电缆过热所引发的热老化会对XLPE电缆绝缘造成不可避免的损害,导致XLPE电缆绝缘性能下降,缩短电缆的使用寿命。阐述了XLPE电缆绝缘的热老化机理,综述了热老化过程对XLPE电缆绝缘微观结构、电荷输运特性和介电性能的影响:老化温度的不同会在一定程度上影响热氧降解过程对XLPE电缆绝缘的晶体结构破坏方式,而XLPE的宏观性能与其晶体结构密切相关,因此在不同老化温度下XLPE的介电性能及电荷输运特性也有所差异。
During the service of cross-linked polyethylene(XLPE)cable,the thermal aging caused by onerheating of the cable will inevitably damage the insulation of the XLPE cable,resulting in a decrease in the performance of XLPE cable insulation and a shortened cable life.In this paper,the thermal aging mechanism of XLPE is expounded and the effects of thermal aging on the micro-structure,charge transport properties and dielectric performance of XLPE cable insulation are reviewed:Different aging temperatures will affect the crystal structure destruction of XLPE cable insulation in the process of thermal oxygen degradation to a certain extent,and the macroscopic properties of XLPE are closely related to its crystal structure.Therefore,the dielectric properties and charge transport characteristics of XLPE are also different at different aging temperatures.
作者
刘涛
李欢
徐磊
杨章勇
LIU Tao;LI Huan;XU Lei;YANG Zhang-yong(School of Electrical Engineering,Shaanxi University of Technology,Hanzhong 723000,China)
出处
《陕西理工大学学报（自然科学版）》
2021年第4期1-9,31,共10页
Journal of Shaanxi University of Technology:Natural Science Edition
基金
江苏省电力公司电力科学研究院项目(5210EF18000N)
陕西省教育厅专项科研计划项目(18JK0152)。
关键词
XLPE
热老化
微观结构
介电性能
cross-linked polyethylene(XLPE)
thermal aging
micro-structure
dielectric performance
