Aging Characters Analysis of Composite Insulators

In this paper, a composite insulator with seven years running history at power grid was taken into account. At first, an electric field was computed through finite elements method and electric field difference at different shed was compared. Secondly, through SEM photos of silastic sections from different sheds, microcosmic structure character of silastic aging under electric and ultraviolet effect was analyzed; through contrasting microcosmic structure of side surface with top and bottom surface of shed, the rules of electric aging and electric erosion was studied; through energy spectrum analysis, the possibility of surface contamination moving into inner of silastic was studied. The results gotten from this paper are positive and helpful for advanced aging studying of composite insulator and optimization design of insulator for anti-aging.