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Equivalent surface conductivity of ice accumulated on insulators during development of AC and DC flashovers arcs

Taheri Ledari Shamsodin, Farzaneh Masoud et Fofana Issouf. (2013). Equivalent surface conductivity of ice accumulated on insulators during development of AC and DC flashovers arcs. IEEE Transactions on Dielectrics and Electrical Insulation, 20, (5), p. 1789-1798.

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URL officielle: http://dx.doi.org/doi:10.1109/TDEI.2013.6633710

Résumé

Surface conductivity of ice was investigated during the development of AC and DC arcs on ice-covered insulators. To determine this parameter, an approach based on fluid mechanics combined with experimental measurements of the water film flow rate and conductivity was used. In particular, the variation of the thickness and volume conductivity of the water film as well as the mechanisms of discharge initiation and arc development on the surface of an ice-covered post insulator were studied. The effect of ice surface conductivity on arc propagation velocity was evaluated for different freezing water conductivities using highspeed video camera techniques. Empirical models were proposed to account for equivalent surface conductivity dynamics during the flashover process. The derived equivalent surface conductivity was used to improve existing dynamic models to predict the minimum flashover voltage of the ice-covered insulator. The computed results from the models were in good agreement with those obtained experimentally.

Type de document:Article publié dans une revue avec comité d'évaluation
Volume:20
Numéro:5
Pages:p. 1789-1798
Version évaluée par les pairs:Oui
Date:21 Octobre 2013
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:conductivity, insulators, films, flashover, ice surface, surface treatment, Equivalent surface conductivity, water film, flashover, arc velocity, ice-covered insulator surface, conductivité, isolants, films, flashover, surface de glace, traitement de surface
Déposé le:17 févr. 2021 19:53
Dernière modification:19 févr. 2021 01:12
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