The flashover influent factors on the insulator surface in the intermittent high speed train wind based on the discussion of the development of both AC and DC flashover model in nature ambient.In the high speed wind

the pressure on the insulator surface

the speed distribution of the wind and its characteristics change a lot compared with normal cases.In this environment

pollution

fog

and the rain will regularly distribute in short time

and this will form a discharge channel

yield arc and finally lead to flashover.When the insulator surface is dry

the high speed wind will bring some charges on it

the uneven distributed charges will make the electric field distorted and cause the flashover at last.So the pollution particle accumulation character on the insulator surface is analyzed to study the flashover.At the same time

the thickness of boundary layer changes with the wind

so the arc blow effect exists for some extent.According to the relationship of the wind speed and the flashover critical voltage

the model is modified.