盐密变化对不同材质绝缘子闪络特性的影响  

Effect of Salt Density Change on Flashover Characteristics of Different Material Insulators

作　　者：李静[1] 刘伟 LI Jing;LIU Wei(School of Electric Engineering, Shenyang University of Technology, Shenyang 110870, China)

机构地区：[1]沈阳工业大学电气工程学院,沈阳110870

出　　处：《科学技术与工程》2020年第12期4748-4753,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：为了研究不同材质绝缘子随盐密变化的闪络特性,以XP-160、LXZP-210、FXBW-10/70绝缘子为研究对象在人工雾室中开展了污秽试验,分析了这三种材质绝缘子的闪络电压、闪络电压梯度随盐密变化的规律以及不同盐密下串长与闪络电压的关系;以此为基础,得到了不同盐密下绝缘子闪络电压与饱和盐密下绝缘子闪络电压之间的具体关系,并给出了利用不同盐密下监测得到的闪络电压估算饱和盐密情况下绝缘子闪络电压值的表达式。试验结果表明:复合绝缘子受污秽的影响程度小于玻璃、瓷绝缘子,且其闪络电压梯度较高;不同材质的绝缘子串长与闪络电压大致成线性关系;不同盐密下的闪络电压与饱和盐密下的闪络电压呈线性关系,不同材质绝缘子的估算系数大致相同。In order to study the flashover characteristics of different material insulators with salt density change,the XP-160,LXZP-210,FXBW-10/70 insulators were used as research objects to carry out contamination test in artificial fog chamber in this paper.The variation of flashover voltage and flashover voltage gradient with salt density of these three material insulators and the relationship between string length and flashover voltage under different salt density were analyzed.Based on this,specific relationship between the flashover voltage of the insulator under different salt density and the flashover voltage of the insulator under saturated salt was obtained,and the expression of the flashover voltage of the insulator under saturated salt density was estimated by using the flashover voltage obtained by monitoring under different salt density.The test results show that the composite insulator is less affected by contamination than glass and porcelain insulators,and its flashover voltage gradient is higher.The length of the insulator string of different materials is approximately linear with the flashover voltage.The flashover voltage under different salt densities is linear with the flashover voltage under saturated salt density,and the estimated coefficients a of different material insulators are approximately the same.

关 键 词：人工污秽试验 闪络电压 饱和盐密 闪络电压梯度 串长 

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]