Simulation on Deposition Characteristics of Contamination Particles in Fog-Haze Environment

Fog-haze weather can aggravate the particles deposition on the insulator surface, which will cause pollution flashover. In this paper, the multiphysics software COMSOL was used to numerically simulate the particle deposition characteristics on the surface of XWP2-160 porcelain insulator under wind tunnel conditions, and the simulation results were compared with wind tunnel test results to verify the rationality of the simulation model and the method. Based on this, the contamination deposition characteristics of this insulator on 110kV transmission lines under fog-haze environment were simulated. And the effects of wind speed, contamination concentration, and voltage type on particle deposition were analyzed. The results show that under the same conditions, the NSDD under DC voltage is the largest and it is the smallest under unelectrified state. The particle deposit amount increases approximately linearly with increasing wind speed and contamination concentration under DC voltage. In moderate fog-haze, the influence of wind speed on AC transmission line is larger than that on DC transmission line. The proportion of NSDDDC to NSDDAC displays a trend of gradual decrease with increasing wind speed and tends to be gentle gradually, and the ratio under all conditions is greater than 4.