GE’s Green Gas for Grid Technology in Norway
Norway’s transmission grid operator Statnett announced it will install the world’s first 420 kilovolt 63 kiloampere GE Green Gas for Grid gas-insulated
Norway’s transmission grid operator Statnett announced it will install the world’s first 420 kilovolt 63 kiloampere GE Green Gas for Grid gas-insulated line and busbars operating at minus 30 degree C within its new 420 kV Hamang substation located in Oslo’s Sandvika area. That makes Norway the eighth country in Europe to adopt g-cubed technology, a game-changing alternative to sulphur hexafluoride, an insulating and switching gas traditionally used in high-voltage substation equipment. Identified as the world’s most potent greenhouse gas by the 1997 Kyoto Protocol, SF6 is estimated to contribute 23,500 times more emissions than CO₂, if leaked, and can remain in the atmosphere for up to 3,200 years.
Gas-insulated line installations from eight major European electrical utilities account for two-thirds of this reduction. Statnett alone is expected to avoid the installation of an additional 24,000 tons of CO2 equivalent to the Norwegian grid.
G Cube has been identified as an alternative to SF6 for use in high-voltage equipment in a report published by Norway’s Water Resources and Energy Directorat in October 2019. This was confirmed by the EU Commission in a similar report published in September 2020, which concluded there are cost-effective, technically feasible and energy efficient alternatives to SF₆. The EU also highlighted that G Cube, unlike any other SF6 alternatives, is the solution when space is a constraint as G Cube products feature the same compactness and performance as traditional SF6 equipment.
G Cube products also have a greatly reduced impact on the environment over their lifetime compared with other solutions, according to life-cycle assessment, based on international ISO 14040/14044 standards.