Post insulator is widely used in the power system

it is of great significance to study the accumulated contamination regularity of post insulator to ensure the stable operation of power system. In this paper

the 110 kV post insulators with three different types were applied in natural contamination tests for 1 year at Qinhuangdao

Zhuzhou and Shizuishan.The influences of different types of post insulators

meteorological data and geographic information on nature contamination accumulation over the post insulator surface were analyzed

then a CFD simulation model of post insulator was founded to further analyze the influences of different types

meteorological data and geographic information. Research results reveal that increase in shed diameter larger will lead to more serious post insulator surface pollution and the more non-uniform pollution distribution on the top and bottom shed surface; the degree of nonuniformity of pollution distribution on the top and bottom shed surface is related to wind speed and angle of air flow

while the surface pollution increases with the increase of entrance pollution volume fractions; simulation results are basically consistent with the results of natural contamination tests.