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Space Charge Dynamics in Epoxy Resins Under the Influence of a Long-Term High Electric Field at Various Temperatures

As the main insulating material of an ultra-high voltage (UHV) resin impregnated paper (RIP) bushing, epoxy resin accumulates space charge under the DC voltage, which would affect the insulation properties of the bushing. In this article, the evolution of space charge accumulation and dissipation wi...

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Autores principales: Zhang, Hongliang, Li, Kun, Jin, Hai, Li, Kangle, Li, Xiaonan, Liu, Peng, Peng, Zongren
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9240626/
https://www.ncbi.nlm.nih.gov/pubmed/35783209
http://dx.doi.org/10.3389/fchem.2022.904750
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author Zhang, Hongliang
Li, Kun
Jin, Hai
Li, Kangle
Li, Xiaonan
Liu, Peng
Peng, Zongren
author_facet Zhang, Hongliang
Li, Kun
Jin, Hai
Li, Kangle
Li, Xiaonan
Liu, Peng
Peng, Zongren
author_sort Zhang, Hongliang
collection PubMed
description As the main insulating material of an ultra-high voltage (UHV) resin impregnated paper (RIP) bushing, epoxy resin accumulates space charge under the DC voltage, which would affect the insulation properties of the bushing. In this article, the evolution of space charge accumulation and dissipation within the epoxy resin samples was measured under the influence of a long-term (24 h) electric field of 60 kV/mm at 40°, 60°, 80°, and 100°C. The experimental results show that the space charge transport in the epoxy sample was a long-time dynamic process. When the temperature was not greater than 60°C, only homocharge accumulation was observed within the samples, and the space charge distribution did not reach a stable state even after 24 h of voltage application. When the temperature was not lower than 80°C, the positive heterocharge accumulation was observed at the interface between cathode and epoxy. Through analysis by fitting and numerical simulation, it was verified that the positive heterocharge accumulation was caused by the limitation of the hole extraction, and the transport of holes within the samples obeyed the jump conductance model.
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spelling pubmed-92406262022-06-30 Space Charge Dynamics in Epoxy Resins Under the Influence of a Long-Term High Electric Field at Various Temperatures Zhang, Hongliang Li, Kun Jin, Hai Li, Kangle Li, Xiaonan Liu, Peng Peng, Zongren Front Chem Chemistry As the main insulating material of an ultra-high voltage (UHV) resin impregnated paper (RIP) bushing, epoxy resin accumulates space charge under the DC voltage, which would affect the insulation properties of the bushing. In this article, the evolution of space charge accumulation and dissipation within the epoxy resin samples was measured under the influence of a long-term (24 h) electric field of 60 kV/mm at 40°, 60°, 80°, and 100°C. The experimental results show that the space charge transport in the epoxy sample was a long-time dynamic process. When the temperature was not greater than 60°C, only homocharge accumulation was observed within the samples, and the space charge distribution did not reach a stable state even after 24 h of voltage application. When the temperature was not lower than 80°C, the positive heterocharge accumulation was observed at the interface between cathode and epoxy. Through analysis by fitting and numerical simulation, it was verified that the positive heterocharge accumulation was caused by the limitation of the hole extraction, and the transport of holes within the samples obeyed the jump conductance model. Frontiers Media S.A. 2022-06-15 /pmc/articles/PMC9240626/ /pubmed/35783209 http://dx.doi.org/10.3389/fchem.2022.904750 Text en Copyright © 2022 Zhang, Li, Jin, Li, Li, Liu and Peng. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Chemistry
Zhang, Hongliang
Li, Kun
Jin, Hai
Li, Kangle
Li, Xiaonan
Liu, Peng
Peng, Zongren
Space Charge Dynamics in Epoxy Resins Under the Influence of a Long-Term High Electric Field at Various Temperatures
title Space Charge Dynamics in Epoxy Resins Under the Influence of a Long-Term High Electric Field at Various Temperatures
title_full Space Charge Dynamics in Epoxy Resins Under the Influence of a Long-Term High Electric Field at Various Temperatures
title_fullStr Space Charge Dynamics in Epoxy Resins Under the Influence of a Long-Term High Electric Field at Various Temperatures
title_full_unstemmed Space Charge Dynamics in Epoxy Resins Under the Influence of a Long-Term High Electric Field at Various Temperatures
title_short Space Charge Dynamics in Epoxy Resins Under the Influence of a Long-Term High Electric Field at Various Temperatures
title_sort space charge dynamics in epoxy resins under the influence of a long-term high electric field at various temperatures
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9240626/
https://www.ncbi.nlm.nih.gov/pubmed/35783209
http://dx.doi.org/10.3389/fchem.2022.904750
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