Enhanced Pollution Flashover of a Slurry Coalescence Superhydrophobic Coating

In this paper, the pollution flashover performance of a superhydrophobic surface with different coating strategies are studied. The results show that a superhydrophobic coating is effective in preventing pollution flashover under high voltage. The superhydrophobic coatings show increased pollution f...

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Bibliographic Details
Published in:IEEE transactions on dielectrics and electrical insulation 2021-02, Vol.28 (1), p.310-317
Main Authors: Xu, Wenjie, Niu, Jiaxuan, Tian, Kaiyi, Huang, Zhengyong, Li, Jian, Wang, Feipeng, Wei, Yuan, Zhao, Yushun
Format: Article
Language:English
Subjects:
Coalescing
Coatings
Flashover
Glass substrates
Hydrophobic surfaces
Hydrophobicity
Insulators
leakage current
Pollution
Pollution abatement
pollution flashover
Room temperature
Rubber
Silicone rubber
Slurries
slurry coalescence
superhydrophobic coating
Surface contamination
Surface treatment
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Summary:In this paper, the pollution flashover performance of a superhydrophobic surface with different coating strategies are studied. The results show that a superhydrophobic coating is effective in preventing pollution flashover under high voltage. The superhydrophobic coatings show increased pollution flashover voltage when compared to room temperature vulcanized silicone rubber and to an uncoated glass substrate. A novel suppression mechanism of the superhydrophobic coating is proposed which is driven by the electrostatic force produced by the applied voltage. The coalesced slippery slurry droplets and the expanded dry area on the superhydrophobic surface contributes to increased flashover voltage on the superhydrophobic surface. The superhydrophobic coating promises to be a prospective application in anti-pollution performance of insulators.
ISSN:1070-9878
1558-4135
DOI:10.1109/TDEI.2020.009101