In order to study the contamination characteristics of porcelain three umbrella insulators and the influence of particle charge. Using COMSOL

a pollution accumulation modle of the wind tunnel at North China Electric Power University was built

and a simulation of the pollution accumulation characteristics of the XSP-160 porcelain three umbrella insulators was conducted

then

the simulation results were compared with the results from the wind tunnel test conducted at the campus. The verification results confirm the rationality of the simulation method. Based on these results

a simulation study was conducted on the natural contamination characteristics of the insulator to analyze the effects of individual factors and composite factors such as wind speed

particle size

particle charges

and voltage type on the natural pollution accumulation characteristics of insulators. The results show that DC voltage leads to a greater overall deposition of contaminants on the insulator surface and a faster rate of increase. However

the values of the deposition under AC voltage is slightly larger than that on the unelectrified state. Under DC condition

the greater the particle charge

the deposition is higher. The propportion of NSDDDCto NSDDACis 0.98

2.24 and 3.90

respectively

when the particles are uncharged

normal charged

and double charged

the propportion of NSDDDCto NSDDACapplroximately linearly increases with increasing particle chanrge.