中国电机工程学报2016，Vol.36Issue(19)：5382-5388,7.DOI:10.13334/j.0258-8013.pcsee.152203
基于介质体内陷阱参数与松弛过程的 XLPE电缆绝缘热老化行为分析
Analysis on Thermal Aging Behaviors of XLPE Cable Insulation Based on Trap Parameters and Relaxation Process
摘要
Abstract
In this paper, the influence of accelerated thermal aging on the trap parameters of XLPE cable insulation was investigated by thermally stimulated depolarization current (TSDC) method. Five relaxation peaks located at−70,−30, 75, 95 and 105℃ respectively were found in the TSDC curves of different XLPE samples. The activation energies of peaks located at about -70 and -30℃ almost remain unchangeable during the whole aging process, so they can be regarded as intrinsic processes of XLPE. These processes can be explained as the movement of molecule chain in amorphous phase and the reorientation of carbonyl respectively. The polarization charge amount varies little in the recrystallization process and increases in the thermally-oxidative aging period. Peak located at about 75℃ is corresponded to the detrapping process in the crystalline/amorphous phase interface. The activation energy of it rises at first and then stays the same, and its trapped charge amount increases significantly in the thermal destruction period. Peaks located at about 95 and 105℃ are corresponded to the movement of molecule chain in crystalline phase and the melting process of crystalline phase. The total charge amount of them jumps in the recrystallization process, and drops in the thermal-oxidative aging period.关键词
交联聚乙烯/热老化/热刺激去极化电流/陷阱参数/活化能/极化Key words
cross-linked polyethylene(XLPE)/thermally aging/thermally stimulated depolarization current(TSDC)/trap properties/activation energy/polarization分类
信息技术与安全科学引用本文复制引用
申作家,罗智奕,詹威鹏,陈腾彪,褚学来,余盈荧,欧阳本红,李建英..基于介质体内陷阱参数与松弛过程的 XLPE电缆绝缘热老化行为分析[J].中国电机工程学报,2016,36(19):5382-5388,7.基金项目
中国南方电网有限公司重点科技项目(SZ2014-015)。 Key Scientific Project of China Southern Power Grid (SZ2014-015) （SZ2014-015）
