Analysis of the stranding effect on the surface voltage gradient of transmission line conductors with round strands

For high-voltage power transmission, the surface voltage gradient (SVG) of the conductor plays a crucial role in meeting corona performance requirements. The SVG is greatly impacted by the smoothness of the conductor’s surface. Under identical conditions, the SVG of smooth, round conductors differs...

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Autor: Riba Ruiz, Jordi-Roger|||0000-0001-8774-2389
Tipo de recurso: artículo
Fecha de publicación:2026
País:España
Institución:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglés
OAI Identifier:oai:dnet:upcommonspor::2861c36db58c743e7cfbd45a7f3ed477
Acceso en línea:https://hdl.handle.net/2117/461809
https://dx.doi.org/10.3390/technologies14050255
Access Level:acceso abierto
Palabra clave:Corona performance
Finite element analysis
Overhead transmission lines
Simulation
Stranded conductors
Surface voltage gradient
Àrees temàtiques de la UPC::Enginyeria elèctrica::Alta tensió
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spelling Analysis of the stranding effect on the surface voltage gradient of transmission line conductors with round strandsRiba Ruiz, Jordi-Roger|||0000-0001-8774-2389Corona performanceFinite element analysisOverhead transmission linesSimulationStranded conductorsSurface voltage gradientÀrees temàtiques de la UPC::Enginyeria elèctrica::Alta tensióFor high-voltage power transmission, the surface voltage gradient (SVG) of the conductor plays a crucial role in meeting corona performance requirements. The SVG is greatly impacted by the smoothness of the conductor’s surface. Under identical conditions, the SVG of smooth, round conductors differs from that of stranded conductors with the same outer radius. This paper uses Finite Element Analysis (FEA) to study the effect of different stranded conductor geometries and three-phase line topologies with stranded conductor bundles on the SVG. Although industry standards and the scientific literature often rely on simplified smooth-cylinder approximations, this research demonstrates that surface irregularities significantly increase electrical stress compared to idealized smooth surfaces. Through simulating various three-phase configurations, the study reveals a nearly constant field enhancement factor across diverse stranded designs. These results enable us to apply formulas developed for smooth conductors to more realistic power line applications involving stranded conductor bundles. Consequently, this FEA approach offers engineers a precise, versatile method for designing high-voltage transmission lines. The findings presented here facilitate a deeper understanding of the SVG surrounding stranded conductors, particularly with regard to its influence on corona phenomena.This project received funding from grant PID2023-147016OB-I00, by MICIU/AEI/https: //doi.org/10.13039/501100011033 and by ERDF “A way of making Europe,” by the European Union and from the Agència de Gestió d’Ajuts Universitaris i de Recerca-AGAUR (2021 SGR 00392).Peer ReviewedMultidisciplinary Digital Publishing Institute (MDPI)20262026-04-2420262026-05-12journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/461809https://dx.doi.org/10.3390/technologies14050255reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)InglésengAgencia Estatal de Investigación http://doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023 PID2023-147016OB-I00 TECNICAS PARA EL ANALISIS DINAMICO DE LA CAPACIDAD DE REDES ELECTRICAS BASADAS EN MODELOS DE CONDUCTORES Y MEDIDAS EN TIEMPO REAL DE DATOS METEOROLOGICOS Y ELECTRICOSopen accesshttp://purl.org/coar/access_right/c_abf2Attribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:dnet:upcommonspor::2861c36db58c743e7cfbd45a7f3ed4772026-05-27T15:37:01Z
dc.title.none.fl_str_mv Analysis of the stranding effect on the surface voltage gradient of transmission line conductors with round strands
title Analysis of the stranding effect on the surface voltage gradient of transmission line conductors with round strands
spellingShingle Analysis of the stranding effect on the surface voltage gradient of transmission line conductors with round strands
Riba Ruiz, Jordi-Roger|||0000-0001-8774-2389
Corona performance
Finite element analysis
Overhead transmission lines
Simulation
Stranded conductors
Surface voltage gradient
Àrees temàtiques de la UPC::Enginyeria elèctrica::Alta tensió
title_short Analysis of the stranding effect on the surface voltage gradient of transmission line conductors with round strands
title_full Analysis of the stranding effect on the surface voltage gradient of transmission line conductors with round strands
title_fullStr Analysis of the stranding effect on the surface voltage gradient of transmission line conductors with round strands
title_full_unstemmed Analysis of the stranding effect on the surface voltage gradient of transmission line conductors with round strands
title_sort Analysis of the stranding effect on the surface voltage gradient of transmission line conductors with round strands
dc.creator.none.fl_str_mv Riba Ruiz, Jordi-Roger|||0000-0001-8774-2389
author Riba Ruiz, Jordi-Roger|||0000-0001-8774-2389
author_facet Riba Ruiz, Jordi-Roger|||0000-0001-8774-2389
author_role author
dc.subject.none.fl_str_mv Corona performance
Finite element analysis
Overhead transmission lines
Simulation
Stranded conductors
Surface voltage gradient
Àrees temàtiques de la UPC::Enginyeria elèctrica::Alta tensió
topic Corona performance
Finite element analysis
Overhead transmission lines
Simulation
Stranded conductors
Surface voltage gradient
Àrees temàtiques de la UPC::Enginyeria elèctrica::Alta tensió
description For high-voltage power transmission, the surface voltage gradient (SVG) of the conductor plays a crucial role in meeting corona performance requirements. The SVG is greatly impacted by the smoothness of the conductor’s surface. Under identical conditions, the SVG of smooth, round conductors differs from that of stranded conductors with the same outer radius. This paper uses Finite Element Analysis (FEA) to study the effect of different stranded conductor geometries and three-phase line topologies with stranded conductor bundles on the SVG. Although industry standards and the scientific literature often rely on simplified smooth-cylinder approximations, this research demonstrates that surface irregularities significantly increase electrical stress compared to idealized smooth surfaces. Through simulating various three-phase configurations, the study reveals a nearly constant field enhancement factor across diverse stranded designs. These results enable us to apply formulas developed for smooth conductors to more realistic power line applications involving stranded conductor bundles. Consequently, this FEA approach offers engineers a precise, versatile method for designing high-voltage transmission lines. The findings presented here facilitate a deeper understanding of the SVG surrounding stranded conductors, particularly with regard to its influence on corona phenomena.
publishDate 2026
dc.date.none.fl_str_mv 2026
2026-04-24
2026
2026-05-12
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/461809
https://dx.doi.org/10.3390/technologies14050255
url https://hdl.handle.net/2117/461809
https://dx.doi.org/10.3390/technologies14050255
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv Agencia Estatal de Investigación http://doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023 PID2023-147016OB-I00 TECNICAS PARA EL ANALISIS DINAMICO DE LA CAPACIDAD DE REDES ELECTRICAS BASADAS EN MODELOS DE CONDUCTORES Y MEDIDAS EN TIEMPO REAL DE DATOS METEOROLOGICOS Y ELECTRICOS
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Multidisciplinary Digital Publishing Institute (MDPI)
publisher.none.fl_str_mv Multidisciplinary Digital Publishing Institute (MDPI)
dc.source.none.fl_str_mv reponame:UPCommons. Portal del coneixement obert de la UPC
instname:Universitat Politècnica de Catalunya (UPC)
instname_str Universitat Politècnica de Catalunya (UPC)
reponame_str UPCommons. Portal del coneixement obert de la UPC
collection UPCommons. Portal del coneixement obert de la UPC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812429

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