中国电机工程学报2016，Vol.36Issue(17)：4770-4777,8.DOI:10.13334/j.0258-8013.pcsee.152053
加速热氧老化中交联聚乙烯电缆绝缘聚集态结构与介电强度关联性研究
Study on Aggregation Structure and Dielectric Strength of XLPE Cable Insulation in Accelerated Thermal-oxidative Aging
摘要
Abstract
In order to study the influence of accelerated thermal-oxidative aging on aggregation structure and dielectric strength of XLPE insulation, The X ray diffraction (XRD), scanning electron microscope (SEM), differential scanning calorimetry (DSC) tests, ac breakdown experiments and oxidation induction time (OIT) experiments were done. Depending on the results that OIT decreases dramatically and then is close to 0, the aging process can be divided into two stages. In the recrystallized stage, the crystallinity, melting temperature and breakdown field strength increase slightly. Meanwhile, the OIT decreases significantly, which reflects the antioxidant is consuming. In the thermal-oxidative aging stage, however, the crystallinity, melting temperature and breakdown field strength decrease dramatically. The OIT is close to 0, indicating the antioxidant is exhausted. During this process, macromolecules break into small molecules, which create chain scissions and oxidation products. The thermal-oxidative aging model depending on thermal expansion and oxidation reaction is presented to explain degradation of aggregation structure and dielectric strength of XLPE insulation in accelerated thermal-oxidative aging.关键词
交联聚乙烯绝缘/加速热氧老化/聚集态结构/介电强度/氧化诱导期/抗氧化剂Key words
XLPE insulation/accelerated thermal- oxidative aging/aggregation structure/dielectric strength分类
信息技术与安全科学引用本文复制引用
詹威鹏,李茜,李建英,褚学来,申作家,罗智奕,陈腾彪,张旭,李欢,周福升,余盈荧..加速热氧老化中交联聚乙烯电缆绝缘聚集态结构与介电强度关联性研究[J].中国电机工程学报,2016,36(17):4770-4777,8.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）
