The Impact of Spacer Shape on the Performance of Three Phase Green Gas Insulated Busduct

Abstract

Currently, reduction of electric field stress in Gas insulated substations (GIS) is majorily responsible for maintenance of dielectric strength In this paper, focused on conducted on different spacer types like Bulb, Rectangular, Circular Vase, Rectangular Vase, and Delta type spacers with and without metal inserts (MI). To study electric-field distribution, stress, and insulation risk, Finite Element Method (FEM) analysis was performed. The findings show geometric characteristics plays a role in field uniformity such that sharp edges lead to localized field enhancement and increased electric field stress. Among all the considered designs, the Delta spacer yielded the optimal performance in terms of less field stress, more voltage distribution, and improved dielectric reliability, rendering it an ideal choice in GIS applications when compared to bulb type spacer available in the existing studies.