Three dimensional analysis of rotating electric field in three-phase gas insulated switchgear

This paper deals with the three dimensional calculation and analysis the effect of the electrical field characteristics in three phase gas insulated switchgear (GIS) with equilateral triangle arrangement. Three phase gas insulation switchgear (GIS) is different with one phase GIS equipment in two aspects: the conductor configurations and the applied voltages. In this research the effect of these differences on the electric field in the three-phase GIS investigated. With the consideration that the region strongly influenced by the three-phase electric field is the area between phases, so this research has focused on the calculation and analysis the characteristics of the electric field in the region between phases in the GIS tank. In this calculation, it will be analyzed about the characteristics of the electric field in the three phase gas insolation switchgear (GIS). Calculation of the electric field is conducted at some point in the GIS tank equilateral three phase. The Simulation and calculation of electric field performed with finite element method. The calculation electric field values are utilized in evaluating the breakdown voltage.