Simulation study on pollution accumulation characteristics of XP13-160 porcelain suspension disc insulators

摘要

The mechanical mechanism of pollution accumulation on XP13-160 porcelain suspension disc insulators was analyzed, and a discriminant for the deposition on the insulator surface was proposed. A simulation of the pollution accumulation characteristics of the insulator in the wind tunnel at North China Electric Power University was conducted through COMSOL Package, and the simulation results were compared with the results from wind tunnel test. The verification results show the rationality of the proposed deposition discriminant and the simulation method. According to these results, a simulation study was conducted on the natural pollution accumulation characteristics of the insulator to analyze the effects of individual and composite factors such as wind speed, particle size, and voltage type. The results show that under natural gentle wind, the overall surface deposit amount increases as the wind speed increases and approximately linearly increases with the particle size. The particle size displays a greater effect on pollution accumulation than the wind speed. Under the AC voltage and the unelectrified state, the overall surface deposit amount does not essentially change at low wind speed and slowly increases at high wind speed with increasing particle size. The proportion of NSDDDC to NSDDAC shows a trend of gradual decrease with increasing wind speed, and the trends are similar under different sizes.