Unraveling the “U-Shaped” Dependence of Surface Flashover Performance on the Surface Trap Level

The effects of surface traps on surface flashover remain controversial. To clarify the relation between surface flashover and surface trap level, in this work, the surface trap level of epoxy composites was modified by nanoparticles incorporation, electron beam irradiation, and ozone treatment. Surf...

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Autores principales:	Shengtao Li, Zhen Li, Yin Huang, Haoming Xu, Farooq Aslam, Daomin Min, Weiwang Wang
Formato:	article
Lenguaje:	EN
Publicado:	IEEE 2019
Materias:	Surface flashover surface trap level surface charge epoxy composites Electrical engineering. Electronics. Nuclear engineering TK1-9971
Acceso en línea:	https://doaj.org/article/4e9e44740af14963a63b1ed10deb3d5b
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id	oai:doaj.org-article:4e9e44740af14963a63b1ed10deb3d5b
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spelling	oai:doaj.org-article:4e9e44740af14963a63b1ed10deb3d5b2021-11-19T00:03:32ZUnraveling the “U-Shaped” Dependence of Surface Flashover Performance on the Surface Trap Level2169-353610.1109/ACCESS.2019.2958956https://doaj.org/article/4e9e44740af14963a63b1ed10deb3d5b2019-01-01T00:00:00Zhttps://ieeexplore.ieee.org/document/8932457/https://doaj.org/toc/2169-3536The effects of surface traps on surface flashover remain controversial. To clarify the relation between surface flashover and surface trap level, in this work, the surface trap level of epoxy composites was modified by nanoparticles incorporation, electron beam irradiation, and ozone treatment. Surface trap characteristics were analyzed by surface potential decay. Surface flashover voltages were measured in a vacuum for dc voltage and in SF<sub>6</sub> for ac voltage. The “U-shaped” curve is founded to describe the relation between surface flashover voltage and surface deep trap level, surface flashover voltage first decreases and then increases with surface deep trap level. Enhancement of surface flashover voltage is attributed to reduced surface charge density, which was calculated by a double-trap flashover model. The simulation results indicate that the surface charge density on left side of “U-shaped” curve is controlled by surface shallow traps, whereas that on the right side is determined by surface deep traps. The effects of surface shallow and deep traps on surface charge accumulation and dissipation are used to demonstrate the reduced surface charges and improved surface flashover voltage for the “U-shaped” curve. The proposed “U-shaped” curve offers a promising way to improve surface flashover performance for high-voltage applications by tailoring surface trap characteristics with surface modifications.Shengtao LiZhen LiYin HuangHaoming XuFarooq AslamDaomin MinWeiwang WangIEEEarticleSurface flashoversurface trap levelsurface chargeepoxy compositesElectrical engineering. Electronics. Nuclear engineeringTK1-9971ENIEEE Access, Vol 7, Pp 180923-180934 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	Surface flashover surface trap level surface charge epoxy composites Electrical engineering. Electronics. Nuclear engineering TK1-9971
spellingShingle	Surface flashover surface trap level surface charge epoxy composites Electrical engineering. Electronics. Nuclear engineering TK1-9971 Shengtao Li Zhen Li Yin Huang Haoming Xu Farooq Aslam Daomin Min Weiwang Wang Unraveling the “U-Shaped” Dependence of Surface Flashover Performance on the Surface Trap Level
description	The effects of surface traps on surface flashover remain controversial. To clarify the relation between surface flashover and surface trap level, in this work, the surface trap level of epoxy composites was modified by nanoparticles incorporation, electron beam irradiation, and ozone treatment. Surface trap characteristics were analyzed by surface potential decay. Surface flashover voltages were measured in a vacuum for dc voltage and in SF<sub>6</sub> for ac voltage. The “U-shaped” curve is founded to describe the relation between surface flashover voltage and surface deep trap level, surface flashover voltage first decreases and then increases with surface deep trap level. Enhancement of surface flashover voltage is attributed to reduced surface charge density, which was calculated by a double-trap flashover model. The simulation results indicate that the surface charge density on left side of “U-shaped” curve is controlled by surface shallow traps, whereas that on the right side is determined by surface deep traps. The effects of surface shallow and deep traps on surface charge accumulation and dissipation are used to demonstrate the reduced surface charges and improved surface flashover voltage for the “U-shaped” curve. The proposed “U-shaped” curve offers a promising way to improve surface flashover performance for high-voltage applications by tailoring surface trap characteristics with surface modifications.
format	article
author	Shengtao Li Zhen Li Yin Huang Haoming Xu Farooq Aslam Daomin Min Weiwang Wang
author_facet	Shengtao Li Zhen Li Yin Huang Haoming Xu Farooq Aslam Daomin Min Weiwang Wang
author_sort	Shengtao Li
title	Unraveling the “U-Shaped” Dependence of Surface Flashover Performance on the Surface Trap Level
title_short	Unraveling the “U-Shaped” Dependence of Surface Flashover Performance on the Surface Trap Level
title_full	Unraveling the “U-Shaped” Dependence of Surface Flashover Performance on the Surface Trap Level
title_fullStr	Unraveling the “U-Shaped” Dependence of Surface Flashover Performance on the Surface Trap Level
title_full_unstemmed	Unraveling the “U-Shaped” Dependence of Surface Flashover Performance on the Surface Trap Level
title_sort	unraveling the “u-shaped” dependence of surface flashover performance on the surface trap level
publisher	IEEE
publishDate	2019
url	https://doaj.org/article/4e9e44740af14963a63b1ed10deb3d5b
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Unraveling the &#x201C;U-Shaped&#x201D; Dependence of Surface Flashover Performance on the Surface Trap Level

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