乙丙橡胶绝缘的表面击穿与沿面放电特性

发布时间：2018-03-12 16:43

本文选题：乙丙橡胶　切入点：表面击穿　出处：《高电压技术》2016年12期 　论文类型：期刊论文

【摘要】：为了探究乙丙橡胶绝缘的表面击穿特性和沿面放电行为,选择板板电极、棒环电极和针板电极3种典型的电极结构来模拟不同电场分布,分别测量并分析了3种电极下外施交流和负极性直流电压时乙丙橡胶的表面击穿电压和击穿痕迹。在外施交流电压下,测量了不同电压下的沿面放电,分析了沿面放电起始和发展过程。试验结果表明:电场分布越均匀,表面击穿电压越大;板板电极下的起始放电电压与电极间距成正相关性,而棒环电极和针板电极下的起始放电与起晕电压相关,其值在1.9~2.4 k V之间;在不同电场分布和放电阶段,发生的放电类型和放电谱图也有所差别,而且在沿面放电前期,放电脉冲幅值较小,约为1.2 V;但是在沿面放电后期,放电比较分散,放电脉冲幅值较大,最高可达43 V。据此可以对沿面放电发展的严重程度进行判断。
[Abstract]:In order to investigate the surface breakdown characteristics and surface discharge behavior of ethylene-propylene rubber insulation, three typical electrode structures were selected to simulate different electric field distribution, such as plate electrode, rod ring electrode and needle plate electrode. The surface breakdown voltage and breakdown trace of ethylene-propylene rubber were measured and analyzed under three kinds of electrodes under external AC and negative DC voltage respectively. The surface discharge at different voltage was measured under external AC voltage. The experimental results show that the more uniform the electric field distribution, the greater the surface breakdown voltage, and the positive correlation between the initial discharge voltage and the electrode spacing. However, the initial discharge of the rod ring electrode and the needle plate electrode is related to the corona initiation voltage, and its value is between 1.9 ~ 2.4 kV, and the discharge type and discharge spectrum are also different in different electric field distribution and discharge stages. In the early stage of surface discharge, the amplitude of discharge pulse is smaller, about 1.2 V, but in the later stage of surface discharge, the discharge pulse amplitude is more dispersed, and the maximum value of discharge pulse is up to 43 V. the severity of the development of surface discharge can be judged according to the above results.
【作者单位】：太原理工大学煤矿电气设备与智能控制山西省重点实验室;
【基金】：国家自然科学基金(51377113;51577123) 山西省自然科学基金(2016021092)~~
【分类号】：TM215.2

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