纳米复合涂层对微米级金属粉尘吸附行为的抑制作用

doi:10.19595/j.cnki.1000-6753.tces.201636

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Abstract Aluminum dust adsorbed on insulator surface may induce discharge or even flashover in DC GIL. So, suppressing dust’s adsorption is of great significance to improve the reliability of the gas-solid insulation system. In this study, two kinds of nanocomposite coatings doped with different fillers, nano-SiC and montmorillonite (MMT) with nano-TiO₂, were designed from the perspective of regulating charge and improving surface adhesion properties. The results show that the effect of MMT-TiO₂ nanocomposite coating (MEP) in inhibiting dust adsorption is better than that of SiC nanocomposite coating (SEP). Compared with the uncoated insulator model, the dust distribution range on the surface of MEP6 coating is greatly reduced, and the dust adsorption quality is reduced by 54%. Therefore, MEP6 has the best suppression effect of adsorption. A force analysis model of metal dust is further established to explain the kinetic process of movement and adsorption, and the adsorption process is divided into three stages: lifting, flying and adsorption. Finally, combined with the analysis of surface charge distribution characteristics and intrinsic adhesion characteristics between materials, it is shown that the reason for the prominent effect of MEP6 coating in inhibiting dust adsorption is that it improves charge regulation and anti-adhesion performance at the same time. This work provides a novel idea for improving the insulation strength of the spacer surface by nanocomposite coating to suppress dust adsorption.

Key words： Aluminum dust DC gas insulated transmission line (GIL) adsorption process suppression effect nanocomposite coating

Received: 14 December 2020

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TM85

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	Wang Jingrui
	Li Qingmin
	Liu Heng
	Wang Jian
	Ni Xiaoru

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Wang Jingrui,Li Qingmin,Liu Heng等. Suppression Effect of Nanocomposite Coating on the Adsorption Behavior of Micron-Scale Metal Dust[J]. Transactions of China Electrotechnical Society, 2022, 37(12): 3172-3182.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.201636 OR https://dgjsxb.ces-transaction.com/EN/Y2022/V37/I12/3172

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