电热老化对应力锥处空间电荷积聚规律影响与机理研究  

Study on Mechanism and Influence of Electrical-thermal Ageing on Accumulation Rule of Space Charges at Stress Cone

作　　者：魏明昊 何东欣 高博 蒋秉夏 王伟[1] WEI Minghao;HE Dongxin;GAO Bo;JIANG Bingxia;WANG Wei(Beijing Key Laboratory of High Voltage&Electromagnetic Compatibility,North China Electric Power University,Beijing 102206,China;Shandong Provincial Key Laboratory of UHV Transmission Technology and Equipment,School of Electrical Engineering,Shandong University,Jinan 250061,China)

机构地区：[1]华北电力大学高电压与电磁兼容北京重点实验室,北京102206 [2]山东大学电气工程学院山东省特高压输变电技术与装备重点实验室,山东济南250061

出　　处：《绝缘材料》2021年第10期61-65,共5页Insulating Materials

基　　金：国家自然科学基金资助项目(51907105)。

摘　　要：为了研究应力锥对空间电荷积聚的影响,设计了具有应力锥结构的模型电缆。搭建平台对模型电缆进行电热联合老化,采用电声脉冲法测量老化前后空间电荷的分布情况,对比不同轴向位置和径向位置的空间电荷积聚情况。结果表明:越靠近应力锥根部,积聚的空间电荷越多,且积聚的空间电荷主要分布在电缆绝缘层靠外侧。对这一现象进行初步解释,认为是应力锥引起的电场畸变造成空间电荷容易在此区域积聚。In order to study the effect of stress cone on the accumulation of space charge,we designed a cable model with stress cone structure.A platform was built to perform the combined electric and thermal ageing on the model cable.The distribution of space charge before and after ageing was measured by pulse electro-acoustic method,and the accumulation of space charge at different axial and radial positions was compared.The results show that more space charge accumulates at the root of the stress cone,and the accumulated space charge mainly distributes on the outside of the insulation layer of the cable.To make a preliminary explanation of this phenomenon,it is believed that the electric field distortion caused by the stress cone makes the space charge easy to accumulate in this area.

关 键 词：空间电荷 应力锥 电热联合老化 交联聚乙烯 

分 类 号：TM247[一般工业技术—材料科学与工程]