According to the ice flashover model

this paper reveals the dynamic characteristics of arc discharge on the surface of ice-covered insulators under the direct voltage based on MATLAB platform.Simulation results show the obvious polarity effect of the leakage current and arc propagation velocity of iced insulators.In the 90 percent of the whole process of flashover

partial discharge develops slowly

but the development of flashover goes up dramatically at the final stage.The simulation results are accordant with the experimental data of man-made ice-covered insulators flashover under the same experimental conditions.