污秽覆冰绝缘子动态闪络特性分析  

Analysis of Dynamic Flashover Characteristics of Polluted Iced Insulators

作　　者：李静[1] 杨小娟 刘树鑫[1] 于龙滨 崔巨勇 LI Jing;YANG Xiao-juan;LIU Shu-xin;YU Long-bin;CUI Ju-yong(School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China;State Grid Northeast Electric Power Research Institute, Shenyang 110003, China)

机构地区：[1]沈阳工业大学电气工程学院,沈阳110870 [2]国网东北电力科学研究院有限公司,沈阳110003

出　　处：《科学技术与工程》2021年第22期9378-9383,共6页Science Technology and Engineering

基　　金：国家自然科学基金(51407120);辽宁省教育厅一般项目(LGD2016029)。

摘　　要：为研究在污秽与覆冰共存条件下的绝缘子动态闪络特性,基于FXBW4-10/100悬式复合绝缘子,通过覆冰水电导率方法模拟了覆冰绝缘子污秽,记录了局部电弧起弧位置和局部电弧形成至发展为沿面闪络的过程,得到了不同污秽程度下覆冰绝缘子的闪络电压变化规律。并建立了覆冰绝缘子动态闪络模型。结果表明:随着覆冰水电导率的增大,绝缘子闪络电压先下降后趋于稳定;闪络过程中,绝缘子上下钢脚处最先起弧;无冰区的存在严重畸变了绝缘子沿面电位分布,无冰区长度越短,畸变越明显。In order to study the dynamic flashover characteristics of insulators under the coexistence of pollution and icing,based on the FXBW4-10/100 suspension composite insulator,the freezing water conductivity method was used to simulate the pollution of iced insulators.The dynamic flashover model of the polluted iced insulators was set up and the location of the local arc in the initial period of flashover was recorded.The process of the formation of the local arc to the development of the flashover was also recorded and variation rules of flashover voltage were acquired.The results show as follows.With the conductivity of the freezing water increases,the flashover voltage of the insulator first decreases and then stabilizes.During the flashover process,the upper and lower steel feet of the insulator start arcing first.The existence of ice-free areas severely deforms the insulator's potential distribution along the surface.The shorter the length of the ice-free zone,the more obvious the distortion.

关 键 词：污秽覆冰试验 覆冰水电导率 动态模型 电场 温度场 

分 类 号：TM216[一般工业技术—材料科学与工程] TM852[电气工程—电工理论与新技术]