宁夏高污秽地区绝缘子表面污秽的表征与积污特性研究OA

Under the influence of industrial emissions and sandstorm weather in high pollution areas of Ningxia,the surface contamination of insulators on transmission line are affected by industrial emissions and natural dust during operation.The content of soluble salt and components of contamination are impor-tant factors for guiding pollution rating and pollution flashover prevention.In this study,there are 89 samples of surface contamination were collected from insulators in the four high pollution areas of Ningx-ia.Their equivalent salt density and ash density data were all measured.The micro morphology,element composition,ionic in soluble salts and insoluble components of four typical samples were analyzed.The results show that the ratio of NSDD to ESDD of contamination in high pollution areas of Ningxia is from 4 to 7.The particle size of contamination on the surface of insulators is mainly concentrated in 10 µm as re-sult of the suspended particulate dust in the atmosphere.The contamination samples were analyzed by TG-MS in the double atmosphere condition.The loss on ignition of contamination was 28％～33.4％in the inert atmosphere,and it was below 0.2％in the air atmosphere.So the carbon element in the pollu-tion mainly existed in the form of carbonate.The soluble salts in the contamination are mainly sulfate,chloride and nitrate.SiO2 and CaSO4·2H2O are mainly components in the insoluble substance.