Gas Insulated Medium Voltage Power Distribution Networks

Medium voltage gas insulated transmission lines (GIL) are explored with the possibility of a continuous manufacturing process. The cables used SF6 replacement gases as the dielectric. The alternative to the traditional GIL design makes it feasible for the cables to be suitable for retrofitting within existing cable ducts with high ampacity GIL while addressing the environmental concerns with this technology. RF air-core dielectric cables with equivalent physical dimensions were identified as potential medium voltage GIL designs. Several model cables were fabricated using the RF cables and characterized for electrical insulation designs.