Abstract Insulator icing threats the stability of power network, and the insulator icing rate and shape are the key parameters for ice flashover predicting. In order to simulate insulator icing accurately, from the point of water droplet movement, taking composite insulator FXBW-35/70 as a sample, this paper built a mathematic model based on the principles of fluid dynamics and electromagnetic field. Accordingly, the shifting rate of water droplets and the local collision efficiency β1 under charged and uncharged conditions were calculated and analyzed. The result shows that, under the condition of low wind speed and small water droplet radius, the electric field can efficiently promote the shifting rate of droplets and increase the collision efficiency by more than 15%. The related icing experiments under charged and uncharged conditions were conducted in an artificial climate chamber. Moreover, the electric field has a remarkable effect on dry-growth icing with an increasing icing rate of 30% and a rougher icing outer shape. However, under the large droplet size, the wet-growth icing has a small effect from electric field, and the icicle can grow with a bending shape.
Han Xingbo,Jiang Xingliang,Huang Yafei等. Icing Properties of Composite Insulator and Droplet Movement under DC Electric Field[J]. Transactions of China Electrotechnical Society, 2020, 35(9): 2042-2050.
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2020, Vol. 35 
