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Three-dimensional modeling of potential and electric-field distributions along an EHV ceramic post insulator covered with ice — part II : effect of air gaps and partial arcs

Volat Christophe et Farzaneh Masoud. (2005). Three-dimensional modeling of potential and electric-field distributions along an EHV ceramic post insulator covered with ice — part II : effect of air gaps and partial arcs. IEEE Transactions on Power Delivery, 20, (3), p. 2014-2021.

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URL officielle: http://dx.doi.org/doi:10.1109/TPWRD.2005.848460

Résumé

The main objective of this paper is to investigate the effect of air-gap position, length, and number on the phenomena preceding flashover along a typical 735-kV porcelain station post insulator unit under heavy ice accretion. Under these conditions, this type of insulator seems to be the most likely subject to flashover. The numerical simulations were performed using Coulomb 3D, a commercial software based on the boundary element method (BEM). Computer simulations were performed during a melting period. Special attention was paid to the presence of a conductive water film at the ice surface and to a partial arc along an air gap. The results obtained showed that the number of air gaps, with or without the presence of a partial arc along them, has a direct effect on the distribution of potential along the iced insulator. Moreover, for the same total arcing distance, the number of air gaps and their position did not affect the average electric field per arcing distance that was used to determine the partial arc presence. Based on these results, suggestions for improving station insulator geometry for icing conditions were proposed.

Type de document:Article publié dans une revue avec comité d'évaluation
ISSN:0885-8977
Volume:20
Numéro:3
Pages:p. 2014-2021
Version évaluée par les pairs:Oui
Date:2005
Identifiant unique:10.1109/TPWRD.2005.848460
Sujets:Sciences naturelles et génie > Génie
Sciences naturelles et génie > Génie > Génie électrique et génie électronique
Sciences naturelles et génie > Sciences appliquées
Département, module, service et unité de recherche:Départements et modules > Département des sciences appliquées > Module d'ingénierie
Mots-clés:Air gaps, Boundary element method (BEM), Ice-covered insulator, Modeling and simulation, Potential and electric-field distributions, Entrefers, Méthode des éléments aux limites (BEM), Isolateur recouvert de glace, Modélisation et simulation, Distributions de potentiel et de champ électrique
Déposé le:30 juin 2021 18:27
Dernière modification:30 juin 2021 18:27
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