摘要
为了研究直流预压对交联聚乙烯中直流接地电树枝引发特性的影响,在不同预压时间下进行了不同电压的直流接地电树枝试验。结果表明:直流接地电树枝的长度随着预压幅值的增加而增大,并且具有明显的极性效应。当直流预压幅值较低时,接地电树枝的长度随预压时间的增加变化较小;当预压幅值远高于接地电树枝的引发电压时,接地电树枝的长度随预压时间增加而显著增加;负极性接地电树枝的长度远大于正极性接地电树枝,且生长分散性更大。
In order to study the effect of DC pre-stress on the initiation characteristics of grounded electrical tree in XLPE, the grounded electrical tree tests under different voltage and pre-stress time were conducted. The results show that the length of grounded electrical tree increases with the increase of pre-stress amplitude, and the polarity effect is obvious. When the pre-stress amplitude is low, the length of grounded electrical tree changes little with the increase of pre-stress time. When the pre-stress amplitude is much higher than the initiation voltage of electrical tree, the length of grounded electrical tree increases obviously with the increase of pre-stress time. The length of electrical tree under negative polarity is much longer than that under positive polarity, and their growth is more dispersive.
作者
刘贺晨
徐晓彬
刘爱静
张铭嘉
刘云鹏
李演达
LIU Hechen;XU Xiaobin;ZHANG Aijing;ZHANG Mingjia;LIU Yunpeng;LI Yanda(Hebei Provincial Key Laboratory of Power Transmission Equipment Security Defense,North China Electric Power University,Baoding 071003,China;State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University,Beijing 102206,China)
出处
《绝缘材料》
CAS
北大核心
2019年第12期65-70,共6页
Insulating Materials
基金
国家重点研发计划(2016YFB0900705)
河北省自然科学基金资助项目(E2018502133)
中央高校基本科研业务费专项资金资助(2018MS079)
