GE Vernova will shortly deliver two high-voltage 420-kV sulfur hexafluoride-free (SF6-free) gas-insulated substations (GIS) for Norwegian transmission system operator Statnett SF and Equinor.
The contract, issued late last year, covered design, supply and installation of GIS units at the Skaidi and Hyggevatn substations as part of Statnett’s 420-kV transmission line project.
Aside from helping to modernize Norway’s electrical grid, they will serve to electrify Melkøya Island in northern Norway, the site of the Hammerfesst LNG plant that receives production from Equinor’s Snøhvit gas field and other fields in the southern Barents Sea.
The design of the substations is based on GE Vernova’s g³ technology, which replaces SF6 gas, a high-emissions gas typically used in high-voltage equipment.
Both the Skaidi and Hyggevatn substations should be operational by 2029.
Courtesy GE Vernova
GE’s g3 insulating and switching gas is the SF6-free alternative for high voltage equipment.
