复合绝缘子悬挂导线安装绝缘护套后的污闪特性  

Pollution Flashover Characteristics of Composite Insulator with Joint Insulation Jacket at Transmission Conductor Near Its High Potential End

作　　者：梅红伟[1] 彭功茂[1] 李健[1] 戴罕奇[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

出　　处：《中国电机工程学报》2011年第31期189-195,共7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：复合绝缘子高压端输电导线上安装绝缘护套能够改善高压端的电场强度,但对其污闪特性的影响国内外尚未有相关的研究报道。研究了复合绝缘子高压端输电导线安装绝缘护套结构在染污受潮情况下的物理模型,分析了护套参数对绝缘子污闪特性的影响,得出了安装优化参数的绝缘护套能够改善复合绝缘子污闪特性的结论。在理论研究的基础上,试验研究了复合绝缘子污闪电压与绝缘护套长度的关系,并给出了适合现场复合绝缘子的较优的绝缘护套参数以及安装该参数绝缘护套后复合绝缘子污闪电压与等值盐密的关系曲线。最后,该较优参数的绝缘护套由厂家生产并安装在现场复合绝缘子上,一年时间的运行结果证实了安装该参数绝缘护套能够改善现场复合绝缘子的外绝缘性能。The method of installing insulation jacket on transmission line conductor can improve the electric field strength of high potential side of composite insulator,but the influences of composite insulator on pollution flashover characteristics have not been made a detailed study until today.In this article,the physical model of composite insulator with insulation jacket was studied in the case of wet contamination,the effects of insulation jacket parameters were analyzed and the conclusion that installing the optimization parameters insulation jacket on transmission line conductor can improve the pollution flashover characteristics of composite insulator was drawn.Furthermore,the correlation between the insulation jacket＇ length and the contamination flashover voltage of composite insulator was obtained by the artificial test.Based on the test results,the optimization insulation jacket parameters are suggested and the relationship curve of contamination flashover voltage of composite insulator installed the suggested insulation jacket and the equivalent salt deposit density（ESDD） was also given.The insulation jackets manufactured according to the optimization parameters were installed onto the transmission line conductor in the field.During one year of operation,the positive effects on the electric field distribution and the reliability of the installed insulation jackets have been confirmed.

关 键 词：复合绝缘子 绝缘护套 污闪电压 最优参数 等值盐密 

分 类 号：TM85[电气工程—高电压与绝缘技术]