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RSS FeedsEnergies, Vol. 13, Pages 591: Surface Discharges and Flashover Modelling of Solid Insulators in Gases (Energies)

 
 

28 january 2020 17:03:29

 
Energies, Vol. 13, Pages 591: Surface Discharges and Flashover Modelling of Solid Insulators in Gases (Energies)
 


The aim of this paper is the presentation of an analytical model of insulator flashover and its application for air at atmospheric pressure and pressurized SF6 (Sulfur Hexafluoride). After a review of the main existing models in air and compressed gases, a relationship of flashover voltage based on an electrical equivalent circuit and the thermal properties of the discharge is developed. The model includes the discharge resistance, the insulator impedance and the gas interface impedance. The application of this model to a cylindrical resin-epoxy insulator in air medium and SF6 gas with different pressures gives results close to the experimental measurements.


 
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