交流GIS用支柱绝缘子绝缘结构优化设计  

Optimized design on insulation structure of post insulators for AC GIS

作　　者：刘超峰 朱传运 李建彬 陈英 黄鑫 齐小虎 王永清 管健 金喜洋 LIU Chaofeng;ZHU Chuanyun;LI Jianbin;CHEN Ying;HUANG Xin;QI Xiaohu;WANG Yongqing;GUAN Jian;JIN Xiyang(Henan Pinggao Electric Co.,Ltd.,Pingdingshan 467001,China)

机构地区：[1]河南平高电气股份有限公司,河南平顶山467001

出　　处：《绝缘材料》2024年第8期92-99,共8页Insulating Materials

基　　金：国家电网有限公司总部科技项目(5500-202355794A-3-8-KJ)。

摘　　要：支柱绝缘子作为气体绝缘金属封闭开关设备(GIS)中重要的支撑部件,其绝缘性能影响着GIS的可靠性和稳定性。本文以工程GIS用支柱绝缘子为研究对象,选取绝缘子表面切向电场强度作为绝缘性能指标,分析了绝缘子伞裙的数量、起始位置、根部半径、顶部半径参数以及收缩伞裙结构对绝缘性能的影响。结果表明:通过增设伞裙,绝缘子切向电场分布呈现波峰、波谷震荡,有利于阻碍绝缘子沿面放电的发展。最大切向电场强度随伞裙数增加而增大,随伞裙起始位置距高压电极距离增大而减小,其位置随伞裙根部半径变化发生转移。优化结构与原始结构相比,其沿面最大切向电场强度由12.66kV/mm下降至9.69kV/mm,降幅为23.5%,通过负极性雷电冲击考核及裕度试验,绝缘裕度高达1.3倍以上。Post insulator is an important supporting component in gas insulated metal enclosed switchgear(GIS),its insulating properties affects the reliability and stability of GIS.Taking the post insulator for engineering GIS as research object,we selected the surface tangential electric field strength of the insulator as the insulating properties index,and analyzed the influence of the umbrella skirts number,starting position,root radius,top radius parameters of the insulator as well as the shrinkage umbrella skirt structure on the insulating properties.The results show that the tangential electric field of insulator shows wave peaks and troughs oscillation distribution by increasing the umbrella skirt number,which is conducive to hinder the development of insulator surface discharge.The maximum tangential electric field strength increases with the increase of umbrella skirts number,and decreases with the increase of the distance between the starting position of umbrella skirt and the high-voltage electrode.The location of the maximum tangential electric field value shifts with the radius at the base of umbrella skirt.Compared with the original structure,the maximum tangential electric field strength along the surface of optimized structure decreases from 12.66 kV/mm to 9.69 kV/mm,and the decrease rate is 23.5%.It is found that the insulation margin is more than 1.3 times through the negative lightning impulse voltage test and margin test.

关 键 词：支柱绝缘子 切向电场强度 沿面放电 结构优化 雷电冲击电压 

分 类 号：TM216[一般工业技术—材料科学与工程]