Gas-insulated switchgear (GIS) are essential components in the power system. They are used at energy hubs, such as electrical substations, and contain switches that control the flow of power in the grid.
SF6 is used in GIS because it has excellent electrical insulation properties. Unfortunately, it is also the most potent greenhouse gas we know of, and more than 23,000 times worse per kg for the environment than CO2. Therefore, finding a good replacement to SF6 would significantly reduce the environmental footprint of switchgear in Norway and the world.
The main goal of the “New gases for GIS” project is to contribute to a future sustainable and robust power grid by investigating long-term alternatives to SF6 to be used in distribution and transmission systems.