复合绝缘子高压端输电导线安装绝缘护套的研究  

Research on Insulation Jacket Put on Transmission Line Conductor Hung by Composite Insulator

作　　者：梅红伟[1] 陈金君[2] 彭功茂[1] 王黎明[1] 关志成[1] 

机构地区：[1]清华大学深圳研究生院,广东省深圳市518055 [2]广东电网公司揭阳供电局,广东省揭阳市522000

出　　处：《中国电机工程学报》2011年第1期109-116,共8页Proceedings of the CSEE

基　　金：国家重点基础研究发展计划项目(973项目)(2009CB724503)~~

摘　　要：提出在复合绝缘子高压端输电导线上安装一定长度的绝缘护套来改善其高压端电场强度的方法,并对该方法的原理和实施效果进行详细研究。建立污秽复合绝缘子干燥情况下在高压端输电导线加绝缘护套的物理模型,分析护套参数对实施效果的影响,得到了安装绝缘护套的理论依据。在此基础上,通过有限元仿真研究护套具体参数与复合绝缘子高压端电场改善效果的关系,并给出安装护套后可能出现的不利因素以及相应解决办法。最后,试验给出了均匀电场下绝缘护套的击穿电压与其厚度的关系;并以220 kV复合绝缘子为例,研究了安装绝缘护套前后复合绝缘子起晕电压和污闪电压的变化情况。试验结果证实了所提安装绝缘护套方法的正确性和可行性。A novel method of putting the insulation jacket on transmission line conductor was proposed to improve the electric field strength of high potential side of composite insulator and the principle was studied in detail.The physical model of this method was given in the case of dry contamination.The feasibility of this method was confirmed and the effects of insulation jacket parameters were analyzed.Based on these theoretical results mentioned above,the finite element method was used to study the relationship between the jacket parameters and the electric field strength of high voltage side of composite insulator,the simulation results were consistent with the theoretical results and the possible adverse factors as well as the corresponding solutions were also given.The experimental research on the relationship between the breakdown voltage and the thickness of insulation jacket was done,and the curve of relationship was drawn.Immediately,a kind of 220 kV composite insulator was taken as the research object.The specific implementation measure putting on the insulation jacket was given.Its corona inception voltage and contamination flashover voltage were obtained under the condition of with and without the insulation jacket.The correctness and feasibility of the proposed method were verified by the test results.

关 键 词：复合绝缘子 绝缘护套 高压端 电场强度 击穿电压 起晕电压 污闪电压 

分 类 号：TM85[电气工程—高电压与绝缘技术]