The relation between dielectric breakdown and transported power density in high-voltage transmission lines

Detalhes bibliográficos
Autor(a) principal: Heilmann,A.
Data de Publicação: 2014
Outros Autores: Dartora,C.A.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Revista Brasileira de Ensino de Física (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1806-11172014000400012
Resumo: Three-phase electric power systems can transmit large amounts of power, typically in the range of 2000 MVA with a voltage of 765 kV. Under such extreme conditions, the air surrounding the transmission lines is ionized, which significantly increases the conductivity. The present contribution proposes a simple model which allows one to estimate the ionization and the electric conductivity of the air as a function of the power density flowing in the power line system. Near the transmission lines, it is shown that the air conductivity is increased by several orders of magnitude relative to normal conditions. In this scenario, the dielectric breakdown is favored by avalanche processes and lightning stroke probability is significantly increased.
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spelling The relation between dielectric breakdown and transported power density in high-voltage transmission linesair ionizationtransmission lineslightningThree-phase electric power systems can transmit large amounts of power, typically in the range of 2000 MVA with a voltage of 765 kV. Under such extreme conditions, the air surrounding the transmission lines is ionized, which significantly increases the conductivity. The present contribution proposes a simple model which allows one to estimate the ionization and the electric conductivity of the air as a function of the power density flowing in the power line system. Near the transmission lines, it is shown that the air conductivity is increased by several orders of magnitude relative to normal conditions. In this scenario, the dielectric breakdown is favored by avalanche processes and lightning stroke probability is significantly increased.Sociedade Brasileira de Física2014-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1806-11172014000400012Revista Brasileira de Ensino de Física v.36 n.4 2014reponame:Revista Brasileira de Ensino de Física (Online)instname:Sociedade Brasileira de Física (SBF)instacron:SBF10.1590/S1806-11172014000400012info:eu-repo/semantics/openAccessHeilmann,A.Dartora,C.A.eng2014-11-28T00:00:00Zoai:scielo:S1806-11172014000400012Revistahttp://www.sbfisica.org.br/rbef/https://old.scielo.br/oai/scielo-oai.php||marcio@sbfisica.org.br1806-91261806-1117opendoar:2014-11-28T00:00Revista Brasileira de Ensino de Física (Online) - Sociedade Brasileira de Física (SBF)false
dc.title.none.fl_str_mv The relation between dielectric breakdown and transported power density in high-voltage transmission lines
title The relation between dielectric breakdown and transported power density in high-voltage transmission lines
spellingShingle The relation between dielectric breakdown and transported power density in high-voltage transmission lines
Heilmann,A.
air ionization
transmission lines
lightning
title_short The relation between dielectric breakdown and transported power density in high-voltage transmission lines
title_full The relation between dielectric breakdown and transported power density in high-voltage transmission lines
title_fullStr The relation between dielectric breakdown and transported power density in high-voltage transmission lines
title_full_unstemmed The relation between dielectric breakdown and transported power density in high-voltage transmission lines
title_sort The relation between dielectric breakdown and transported power density in high-voltage transmission lines
author Heilmann,A.
author_facet Heilmann,A.
Dartora,C.A.
author_role author
author2 Dartora,C.A.
author2_role author
dc.contributor.author.fl_str_mv Heilmann,A.
Dartora,C.A.
dc.subject.por.fl_str_mv air ionization
transmission lines
lightning
topic air ionization
transmission lines
lightning
description Three-phase electric power systems can transmit large amounts of power, typically in the range of 2000 MVA with a voltage of 765 kV. Under such extreme conditions, the air surrounding the transmission lines is ionized, which significantly increases the conductivity. The present contribution proposes a simple model which allows one to estimate the ionization and the electric conductivity of the air as a function of the power density flowing in the power line system. Near the transmission lines, it is shown that the air conductivity is increased by several orders of magnitude relative to normal conditions. In this scenario, the dielectric breakdown is favored by avalanche processes and lightning stroke probability is significantly increased.
publishDate 2014
dc.date.none.fl_str_mv 2014-12-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1806-11172014000400012
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1806-11172014000400012
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1806-11172014000400012
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Sociedade Brasileira de Física
publisher.none.fl_str_mv Sociedade Brasileira de Física
dc.source.none.fl_str_mv Revista Brasileira de Ensino de Física v.36 n.4 2014
reponame:Revista Brasileira de Ensino de Física (Online)
instname:Sociedade Brasileira de Física (SBF)
instacron:SBF
instname_str Sociedade Brasileira de Física (SBF)
instacron_str SBF
institution SBF
reponame_str Revista Brasileira de Ensino de Física (Online)
collection Revista Brasileira de Ensino de Física (Online)
repository.name.fl_str_mv Revista Brasileira de Ensino de Física (Online) - Sociedade Brasileira de Física (SBF)
repository.mail.fl_str_mv ||marcio@sbfisica.org.br
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