Dynamics of metallic particle contamination in a gas insulated busduct with SF6 and N2 gas mixtures

It is known that breakdown strength of SF₆ is extremely susceptible to non-uniform electric fields and metallic particle contamination, these effects lead to lower the breakdown voltage. Furthermore, from the view point of environmental protection, as SF₆ has strong greenhouse effect, the use of SF₆ will be strong controlled. Thus, it is needed to develop the alternative dielectric gas or gas mixtures having better insulating characteristics and no greenhouse effect. In this paper particle movement with SF₆ and N₂ mixtures has been simulated and results have been presented in a single phase isolated conductor GIB. The results have been analyzed and presented. It is observed that 40 percent SF₆ and 60 percent N₂ gives good results, under this condition the GIS can be operated reliably.