| Title |
The Analysis of Insulation Properties with Electron Collision Processes on SF6 Mixture Gases |
| Keywords |
Gas Insulated Switchgear ; SF_6/N_2 Mixture Gas ; SF_6/CF_4 Mixture Gas ; SF_6/C_4F_8 Mixture Gas ; Synergy Effect ; Propagator Method |
| Abstract |
SF_6 gas would be used in power transformer, GIS (Gas insulated switchgear) and so on because of its electrically superior insulation and chemically stable structure. Recently, the reduction of SF_6 is required to avoid global warming and the researches on the dilution of SF_6 with other gases have been carried out. SF_6 mixture gases with N_2 and C_xF_y have drawn attention to the synergy effect. However, in order to understand the mechanism of the synergy effect, it is important to analyze and evaluate properties of mixture gases quantitatively. In this paper, we investigated the mechanism of synergy effect from electron collision processes and electron energy distribution by solving Boltzmann equation with propagator method. Three kinds of gases for dilution of SF_6 (SF_6/N_2, SF_6/CF4 and SF_6/C_4F_8) are considered in this simulation. On the properties of SF_6/N_2 mixture gas, the variation of reduced electric field was shown highly within 0%~40% mixtures of SF_6. And the more low-level electron energy has been distributed, the higher insulation capability has appeared. |