电工技术学报  2016, Vol. 31 Issue (21): 176-182    DOI:
高电压与绝缘技术 |
在线注入有机硅修复液对交联聚乙烯电缆中水树生长的影响
黄明,周凯,杨滴,杨明亮
四川大学电气信息学院 成都 610065
Effect of On-Line Rejuvenation on Water Tree Propagation in XLPE Cables
Huang Ming,Zhou Kai,Yang Di,Yang Mingliang
College of Electronics and Information Engineering Sichuan University Chengdu 610065 China
全文: PDF (2447 KB)  
输出: BibTeX | EndNote (RIS)      
摘要 提出了水树老化电缆的在线修复方法,讨论了在交变电场下修复液对水树的抑制作用及其绝缘修复机理。采用高频高压水针电极法对新样本、预修复样本和在线修复样本进行加速水树老化。老化一个月后,使用显微镜观察样本中水树形态并测量其水树长度。通过差示扫描量热法分析样本绝缘层的劣化程度,同时利用扫描电镜和能谱分析仪对比水树区域的微观形貌及化学结构变化。研究表明,在线注入有机硅修复液能有效地抑制水树的生长。在电场的作用下,修复液分子和水分子同时向强电场区域(如微孔、水树区域等)进行扩散并发生反应,消耗水分并且生成凝胶颗粒填充微孔,一定程度上缓解了绝缘的劣化。
服务
把本文推荐给朋友
加入我的书架
加入引用管理器
E-mail Alert
RSS
作者相关文章
黄明
周凯
杨滴
杨明亮
关键词 交联聚乙烯电缆水树硅氧烷电场取向介电泳力    
Abstract:A novel method of on-line rejuvenation for water trees in service cross-linked polyethylene (XLPE) cables is presented,the inhibition effect and the rejuvenation mechanism are also discussed.A 30-day accelerated water tree aging experiment was done on the new samples,the prior rejuvenation samples and the on-line rejuvenation samples.After that,a microscope was used to observe the morphology of water trees and measure the length of the water trees.By differentially scanning calorimetry (DSC),the insulation degradation degree of the three group samples was analyzed.Meanwhile,the changes of micromorphology and chemical structure in water-tree areas were observed by scanning electron microscope (SEM) and energy disperse spectroscopy (EDS).The results show that the on-line rejuvenation method can effectively inhibit the propagation of water trees.Under the effect of electric field,the siloxane and water molecules are driven to the high electric field areas (such as void,water tree area,etc.) for reaction,which eliminates the deterioration in the insulation and generates gel particles to fill the areas,relieving the insulation degradation to some degree.
Key wordsXLPE cable    water tree    siloxane    electric field    chain orientation    dielectrophoretic force   
收稿日期: 2015-06-17      出版日期: 2016-11-21
PACS: TM854  
基金资助:国家自然科学基金资助项目(51477106)。
作者简介: 黄 明 男,1990年生,硕士研究生,研究方向为电缆绝缘诊断及修复技术。E-mail:hm_scu@163.com(通信作者)周 凯 男,1975年生,博士,教授,硕士生导师,研究方向为电缆绝缘诊断及修复技术。E-mail:zhoukai_scu@163.com
引用本文:   
黄明,周凯,杨滴,杨明亮. 在线注入有机硅修复液对交联聚乙烯电缆中水树生长的影响[J]. 电工技术学报, 2016, 31(21): 176-182. Huang Ming,Zhou Kai,Yang Di,Yang Mingliang. Effect of On-Line Rejuvenation on Water Tree Propagation in XLPE Cables. Transactions of China Electrotechnical Society, 2016, 31(21): 176-182.
链接本文:  
https://dgjsxb.ces-transaction.com/CN/Y2016/V31/I21/176