交流电压下污秽成分对瓷绝缘子泄漏电流及闪络电压的影响研究  

Study on the Influence of Contaminated Components on the Leakage Current and Flashover Voltage of Porcelain Insulators Under AC Voltage

作　　者：王胜辉[1] 王玺铭 李楠[2] WANG Shenghui;WANG Ximing;LI Nan(School of Electrical and Electronic Engineering,North China Electric Power University,Beijing 102206,China;State Grid Baoding Power Supply Company,Baoding 071051,China)

机构地区：[1]华北电力大学电气与电子工程学院,北京102206 [2]国网保定供电公司,河北保定071051

出　　处：《华北电力大学学报（自然科学版）》2023年第4期53-59,共7页Journal of North China Electric Power University：Natural Science Edition

基　　金：国家重点研发计划项目(2018YFF01011903)。

摘　　要：绝缘子在户外的表面污秽成分十分复杂,绝缘子表面电导特性和污闪电压在不同污秽成分的影响下有明显差异。选取4种典型污秽成分进行了试验研究,对比测量了涂刷不同污秽成分的绝缘子表面泄漏电流和闪络电压,获得了污秽成分对绝缘子泄漏电流特性和闪络电压的影响特性。试验表明,绝缘子泄漏电流最大值随着湿度和可溶性物质附着密度(SCD)的增加而增加,不同污秽成分在SCD较小时,区分度不高。绝缘子的闪络电压主要与可溶污秽成分的电导率、溶解度、电离特性和不溶污秽的成分组成以及它们相互间的影响有关。不同单种无机盐污秽成分的绝缘子闪络电压由低到高依次为:NaCl、NaNO_(3)、MgSO_(4)、CaSO_(4)。不同混合无机盐污秽的绝缘子闪络电压均随着混合污秽中所含CaSO_(4)质量分数的增加呈上升趋势。The components of surface contamination of insulators outdoors are very complicated,and the surface conductivity characteristics and contamination flashover voltage of insulators are significantly different under the influence of different pollution components.Four typical pollution components were selected for experimental research,and the surface leakage current and flashover voltage of insulators painted with different pollution components were compared and measured to obtain the influence characteristics of the pollution components on leakage current and flashover voltage of the insulators.The test results show that the maximum leakage current of insulators increases with the increase of humidity and soluble matter adhesion density(SCD).When the SCD of different contaminants is small,the discriminability of insulators is not very high.The flashover voltage of insulators is mainly related to the conductivity,solubility,ionization characteristics and composition of insoluble contaminants as well as their interaction.The insulator flashover voltage of different single inorganic salt contamination components from low to high is as follows:NaCl,NaNO_(3),MgSO_(4),CaSO_(4).The flashover voltage of insulators polluted by different mixed inorganic salts shows an upward trend with the increase of the content of CaSO_(4) in the mixed contamination.

关 键 词：瓷绝缘子 污秽成分 无机盐 泄漏电流 闪络电压 

分 类 号：TM216[一般工业技术—材料科学与工程]