高电压技术2017，Vol.43Issue(5)：1656-1663,8.DOI:10.13336/j.1003-6520.hve.20170428035
有机硅修复后水树电缆在电热老化下的电气性能和微观结构变化
Changes of Electrical Properties and Micro Structures of Water-tree Cables Rejuvenated by Siloxane During the Process of Electrical-thermal Aging
摘要
Abstract
To understand long-lasting rejuvenation treatment of the cable rejuvenation technology,the electrical-thermal aging experiment was performed on rejuvenated and un-rejuvenated water-tree cables,and the electrical property and micro-structure changes of the two groups of samples were compared.Based on the water-tree accelerated aging platform,a water-needle aging method was used to obtain water trees in cross-linked polyethylene (XLPE) cable samples,and one group of the samples was injected with rejuvenation liquids while another group remained unchanged.Then both two groups of samples were subjected to electrical-thermal aging.Samples before and after the electrical-thermal aging were observed by microscope,it shows that water tree sizes of rejuvenated samples are much shorter than that of un-rejuvenated samples after two weeks of electrical-thermal aging.Dielectric loss factor (tanδ) test shows that after two weeks of electrical-thermal aging,insulation performance of the rejuvenated samples is better than that of un-rejuvenated samples.Using the scanning electron microscope (SEM) and energy disperse spectroscopy (EDS) to observe the water-tree area,the produced rejuvenation fillers in water tree voids are observed tightly embed in the XLPE matrix after two weeks of electrical-thermal aging.According to the results,it shows that the rejuvenation fillers in water tree voids can effectively inhibit the further growth of water trees and keep long-term effect.关键词
交联聚乙烯电缆/水树/修复/电热老化/填充物/抑制/长期作用Key words
XLPE cable/water trees/rejuvenation/electrical-thermal aging/filler/inhibition/long-term effect引用本文复制引用
周凯,杨明亮,黄明,吴科,李康乐,李天华..有机硅修复后水树电缆在电热老化下的电气性能和微观结构变化[J].高电压技术,2017,43(5):1656-1663,8.基金项目
国家自然科学基金(51477106).Project supported by National Natural Science Foundation of China(51477106). （51477106）
