均压环对复合绝缘子电场的影响研究  

Research of Grading Ring Influence on Composite Insulator Electric Field

作　　者：姚淮林 吴秋亮 YAO Huai-lin;WU Qiu-liang(Jiangsu Nari Power Electric Co.,Ltd,Nanjing 211103,China)

机构地区：[1]江苏南瑞帕威尔电气有限公司,江苏南京211103

出　　处：《电工电气》2018年第10期10-14,共5页Electrotechnics Electric

摘　　要：以复合支柱绝缘子为研究对象,利用有限元分析数值计算方法对绝缘子电场进行分析计算,并探究均压环对绝缘子电场的改善作用。当绝缘子老化或者工艺欠缺而造成护套内有气泡时,极易发生放电、击穿以及烧蚀现象。同时绝缘子高压法兰部位第一个大小伞承担了较多的电压降,运行中容易造成绝缘失败。在绝缘子高压侧端部加装均压环,并针对均压环的尺寸和安装位置对绝缘子电场的影响进行分析。结果表明,绝缘子加装均压环可以明显改善绝缘子附近的电场分布,降低第一只伞上的电场;且均压环管径越大、外径越小时均压效果越明显。Taking the composite post insulator as the research object, this paper used the fnite element analysis numerical computation method to carry out analysis and calculation for insulator electric felds and explored the impacts of grading ring on the insulator electric feld. When the insulator aged or there were bubbles in the sheath due to technology defects, the discharge, breakdown and ablation phenomenon happened easily. And the feld intensity concentrated around the frst umbrella which might lead to the insulation fault, so a grading ring is set up at the end of high voltage fange and then its electrical feld was calculated taking different dimensions and installation site of grading ring into consideration. The calculation results show that the insulator added the grading ring could obviously improve the electrical distribution around the insulator to reduce the electric feld of the frst umbrella, in addition, the electrical distribution will turn more average with larger diameter and more far location.

关 键 词：复合绝缘子 电场计算 均压环 绝缘分析 

分 类 号：TM216[一般工业技术—材料科学与工程]