Synergy Effect in Electrical Insulation Characteristics of N₂O Gas Mixtures

Abstract

This paper discusses partial discharge (PD) and breakdown (BD) characteristics of N₂O gas and N₂O gas mixtures as SF₆ substitutes as a function of gas pressure and N₂O content for quasi-uniform and non-uniform electric field under lightning impulse and ac voltage application. Experimental results revealed the significant positive synergism in breakdown strength of N₂O30%/CO₂70% and N₂O30%/CO₂50%/O₂20% gas mixtures under quasi-uniform electric field. Furthermore, corona stabilization effect in N₂O30%/CO₂70% gas mixtures under non-uniform electric field was discussed and suggested to be activated due to the combination of electronegative N₂O and CO₂ gases.