Spatial-temporal dynamic characteristics of growth and evolution of micron-nanometre dust-speckles along insulator interface in GIL

Xue, Naifan, Li, Qingmin, Wei, Lai, Wang, Yuan, Yang, Ruicheng, Li, Xuan, Wang, Changzhu, Ren, Hanwen, Wang, Jian and Haddad, A. Manu ORCID: https://orcid.org/0000-0003-4153-6146 2024. Spatial-temporal dynamic characteristics of growth and evolution of micron-nanometre dust-speckles along insulator interface in GIL. Presented at: 23rd International Symposium on High Voltage Engineering (ISH 2023), Glasgow, UK, 28 August 2023. Proceedings 23rd International Symposium on High Voltage Engineering. IET, pp. 681-685. 10.1049/icp.2024.0601

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Abstract

In the process of production, installation, and operation of GIS/GIL equipment, it is inevitable to produce micron-nanometre dust. However, in the GIL cavity, micron-nanometre dust is easily adsorbed on the insulator surface due to the coupling effect of multiple physical fields, significantly reducing the insulation performance. Therefore, the adsorption characteristics of micron-nanometre dust on insulator surface are studied and a dynamic adsorption observation platform for micron-nanometre dust is set up. It is found that the dynamic growth behaviour of micron-nanometre dust in SF6 environment includes the following five processes: the micron-nano dust is lifted under the action of voltage and diffused and adsorbed on the insulator, indicating that dust speckles are formed on the insulator surface; the thickness of micron-nanometre dust speckles increases and forms obvious contours; the micron-nanometre dust violently "explodes" to form wing-shaped diffusion marks, and the dust speckles end up growing; severe surface flashover or strong partial discharge (non-breakdown) of dust speckles lead to the ignition of dust speckles; the position of the dust speckles left obvious discharge path and ablation trace, and the dust speckles was destroyed. The experimental research and theoretical analysis in this article can provide a significant basis for further research.

Item Type:	Conference or Workshop Item (Paper)
Date Type:	Published Online
Status:	Published
Schools:	Engineering
Publisher:	IET
ISBN:	978-1-83953-992-3
Last Modified:	04 Oct 2024 15:14
URI:	https://orca.cardiff.ac.uk/id/eprint/172307

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