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Study on Deterioration Characteristics of a Composite Crossarm Mandrel in a 10 kV Distribution Network Based on Multi-Factor Aging

This paper presents a study that conducted 5000 h of multi-factor aging tests on 10 kV composite crossarms, considering the natural environment in coastal areas and actual power line operations. Various aging conditions, such as voltage, rain, temperature, humidity, salt fog, ultraviolet light, and...

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Autores principales: Ma, Long, Fu, Xiaotao, Chen, Lincong, Chen, Xiaolin, Zhang, Cong, Li, Xinran, Li, Wei, Fu, Fangda, Fu, Chuanfu, Lin, Taobei, Mao, Wensheng, Liu, Hechen
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10489824/
https://www.ncbi.nlm.nih.gov/pubmed/37688202
http://dx.doi.org/10.3390/polym15173576
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author Ma, Long
Fu, Xiaotao
Chen, Lincong
Chen, Xiaolin
Zhang, Cong
Li, Xinran
Li, Wei
Fu, Fangda
Fu, Chuanfu
Lin, Taobei
Mao, Wensheng
Liu, Hechen
author_facet Ma, Long
Fu, Xiaotao
Chen, Lincong
Chen, Xiaolin
Zhang, Cong
Li, Xinran
Li, Wei
Fu, Fangda
Fu, Chuanfu
Lin, Taobei
Mao, Wensheng
Liu, Hechen
author_sort Ma, Long
collection PubMed
description This paper presents a study that conducted 5000 h of multi-factor aging tests on 10 kV composite crossarms, considering the natural environment in coastal areas and actual power line operations. Various aging conditions, such as voltage, rain, temperature, humidity, salt fog, ultraviolet light, and mechanical stress, were applied during the tests. The research initially analyzed the influence of multi-factor aging on the bending and tensile properties of the full-size composite crossarm. Subsequently, a detailed investigation was carried out to assess the impact of aging on the mechanical properties, electrical insulation properties, and microscopic characteristics of the composite crossarm core bar. Results indicated that the tensile strength and bending strength of the full-size composite crossarm mandrel experienced minimal changes after aging, remaining well within operational requirements. However, the silicone rubber outer sheath’s hydrophobicity decreased, leading to the appearance of cracks and holes on the surface, which provided pathways for moisture and salt infiltration into the mandrel. As a consequence, the bending strength and shear strength of the mandrel material were reduced by 16.5% and 37.7%, respectively. Moreover, the electrical performance test demonstrated a slight change in the mandrel’s leakage current, while the electrical breakdown strength decreased by 22.8%. Microscopic analysis using SEM, three-dimensional CT, and TGA revealed that a small amount of resin matrix decomposed and microcracks appeared on the surface. Additionally, the fiber-matrix interface experienced debonding and cracking, leading to an increased moisture absorption rate of the mandrel material.
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spelling pubmed-104898242023-09-09 Study on Deterioration Characteristics of a Composite Crossarm Mandrel in a 10 kV Distribution Network Based on Multi-Factor Aging Ma, Long Fu, Xiaotao Chen, Lincong Chen, Xiaolin Zhang, Cong Li, Xinran Li, Wei Fu, Fangda Fu, Chuanfu Lin, Taobei Mao, Wensheng Liu, Hechen Polymers (Basel) Article This paper presents a study that conducted 5000 h of multi-factor aging tests on 10 kV composite crossarms, considering the natural environment in coastal areas and actual power line operations. Various aging conditions, such as voltage, rain, temperature, humidity, salt fog, ultraviolet light, and mechanical stress, were applied during the tests. The research initially analyzed the influence of multi-factor aging on the bending and tensile properties of the full-size composite crossarm. Subsequently, a detailed investigation was carried out to assess the impact of aging on the mechanical properties, electrical insulation properties, and microscopic characteristics of the composite crossarm core bar. Results indicated that the tensile strength and bending strength of the full-size composite crossarm mandrel experienced minimal changes after aging, remaining well within operational requirements. However, the silicone rubber outer sheath’s hydrophobicity decreased, leading to the appearance of cracks and holes on the surface, which provided pathways for moisture and salt infiltration into the mandrel. As a consequence, the bending strength and shear strength of the mandrel material were reduced by 16.5% and 37.7%, respectively. Moreover, the electrical performance test demonstrated a slight change in the mandrel’s leakage current, while the electrical breakdown strength decreased by 22.8%. Microscopic analysis using SEM, three-dimensional CT, and TGA revealed that a small amount of resin matrix decomposed and microcracks appeared on the surface. Additionally, the fiber-matrix interface experienced debonding and cracking, leading to an increased moisture absorption rate of the mandrel material. MDPI 2023-08-28 /pmc/articles/PMC10489824/ /pubmed/37688202 http://dx.doi.org/10.3390/polym15173576 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Ma, Long
Fu, Xiaotao
Chen, Lincong
Chen, Xiaolin
Zhang, Cong
Li, Xinran
Li, Wei
Fu, Fangda
Fu, Chuanfu
Lin, Taobei
Mao, Wensheng
Liu, Hechen
Study on Deterioration Characteristics of a Composite Crossarm Mandrel in a 10 kV Distribution Network Based on Multi-Factor Aging
title Study on Deterioration Characteristics of a Composite Crossarm Mandrel in a 10 kV Distribution Network Based on Multi-Factor Aging
title_full Study on Deterioration Characteristics of a Composite Crossarm Mandrel in a 10 kV Distribution Network Based on Multi-Factor Aging
title_fullStr Study on Deterioration Characteristics of a Composite Crossarm Mandrel in a 10 kV Distribution Network Based on Multi-Factor Aging
title_full_unstemmed Study on Deterioration Characteristics of a Composite Crossarm Mandrel in a 10 kV Distribution Network Based on Multi-Factor Aging
title_short Study on Deterioration Characteristics of a Composite Crossarm Mandrel in a 10 kV Distribution Network Based on Multi-Factor Aging
title_sort study on deterioration characteristics of a composite crossarm mandrel in a 10 kv distribution network based on multi-factor aging
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10489824/
https://www.ncbi.nlm.nih.gov/pubmed/37688202
http://dx.doi.org/10.3390/polym15173576
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