复合绝缘子直流电场下的水滴运动及覆冰特性

doi:10.19595/j.cnki.1000-6753.tces.190244

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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.

Key words： Composite insulator icing water droplet collision efficiency DC electric field

Received: 08 March 2019 Published: 12 May 2020

PACS:

TM85

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	Han Xingbo
	Jiang Xingliang
	Huang Yafei
	Ren Xiaodong
	Chen Yu

Cite this article:

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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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.190244 OR https://dgjsxb.ces-transaction.com/EN/Y2020/V35/I9/2042

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