论文部分内容阅读
绝缘子表面在自然条件下会积累各种不同类型的污秽成分,而其中不溶物会对绝缘子污闪电压产生一定影响.该文选用7片标准悬式瓷和玻璃绝缘子串作为研究对象,试验研究了其在不同不溶物下的交流闪络特性,结合不溶物不同类型及颗粒直径下的绝缘子污秽试验测量结果,分析了不溶物对绝缘子闪络电压的影响.结果表明:不同不溶物类型对污闪电压的影响有差异,但不同种类的不溶物基本不会对可溶物的影响指数产生影响;不溶物颗粒直径对污闪电压存在一定影响,在绝缘子类型,盐灰密与污秽成分相同条件下,污闪电压随不溶物粒径的增大而增大.因此,在绝缘子污闪研究中,不能仅用高岭土或者硅藻土模拟灰密得到的试验结果来分析评判所有不溶物对绝缘子闪络的影响,需要综合考虑不溶物的各种成分类型以及其粒径大小等多种因素的影响.“,”In natural conditions different types of contaminants will accumulate on the surface of the insulators,and the insoluble contaminants have an obvious influence on the voltageof insulators.In this paper 7-unit standard XP4-160 and LXY4-160 insulator strings were taken as the research subject and its AC flashover characteristics with different insoluble contaminants were studied.By combining the test results of different types and particle diameter of insoluble contaminants,the effect of the insoluble contaminants on the AC flashover characteristics of the insulator was analyzed.The result shows that different types of the insoluble contaminants have different effects on the flashover voltage of the insulators.However,it has no influence on the exponents a of soluble contaminants respectively.The particle diameter of insoluble contaminant also has an influence on the flashover voltage of insulators,and it rises with the increasing particle diameter of different insoluble contaminants when the ESDD,NSDD and the type of insoluble contaminant are the same.As a result,in the study of insulator pollution flashover,it cannot just use kaolin and diatomite to simulate the NSDD to analyze the influence of insoluble contaminant on insulator flashover,which should also consider its type and particle diameter.