Insulation integrity of metallic particles in a Gas Insulated Busduct using SF6 and N{in2} gas mixture under the influence of power frequency and impulse voltages

In this paper a model has been formulated to simulate the movement of wire like particle under the influence of Lightning impulse voltage superimposed on power frequency voltage in single phase common enclosure GIB with SF₆ and N₂ gas mixtures. The results have been presented and analyzed in this paper. Distance traveled in the radial direction is found to be reduced with SF₆, N₂ gas mixture. It is found that SF₆ and N₂ mixture of gases perform better when compared to pure SF₆ gas in the presence of metallic particle contamination. 40%-60% of N₂ in SF₆ and N₂ gas mixtures can be referred as optimal mixture of gases which can substitute for pure SF₆ for the same set up electrical equipment in GIL. At the same time the greenhouse gas effect is also reduced.