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Modeling of the AC Arc Discharge on Snow-covered Insulators

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3 Author(s)
Hemmatjou, H. ; Univ. du Quebec a Chicoutimi, Quebec City ; Farzaneh, M. ; Fofana, I.

A mathematical model for predicting the ac flashover voltage of snow-covered insulators is presented. The arc constant parameters in air gaps and inside snow, as well as the arc reignition condition are determined using a cylindrical model. The effects of the arc length on the arc constants parameters are also investigated. The model is then applied to an EPDM insulator artificially covered with natural snow. There is good concordance between the flashover results determined from the mathematical model and those obtained experimentally.

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Dielectrics and Electrical Insulation, IEEE Transactions on  (Volume:14 ,  Issue: 6 )