| In order to study the problem of icing on the surface of transmission conductors under low-temperature snow and freezing rain conditions, a numerical model simulating the impact distribution of supercooled water droplets and the growth process of icing dry and wet is constructed in this paper, and the icing process on the surface of stranded conductors at different ambient temperatures is simulated. By comparing with the experimental results, the ice thickness errors at the stagnant point at -15 °C and -5 °C are 2.4% and 7%, respectively, and the icing morphology is in good agreement with the experimental results, which verifies the accuracy of the model. On this basis, this paper studies the icing process on the surface of stranded conductors. The results show that in the early stage of icing, the outer diameter profile of the conductor has a significant impact on the surface morphology of the ice layer, and in the middle and late stages of icing, the surface morphology of the ice layer gradually develops smoothly. Subsequently, the effects of wind speed, ambient temperature, median diameter of water droplets and liquid water content on the icing morphology and icing rate of the stranded conductor were further analyzed. The study found that the icing rate decreased with the increase of wind speed and liquid water content; in the range of -1 ℃ to -15 ℃, the icing density decreased with the decrease of ambient temperature; the increase of water droplet particle size caused the icing area to develop backward along the wire surface. |
