The European Commission’s LIFE climate action program has awarded GE Renewable Energy’s Grid Solutions business Euro 3 million to fund the realization of a full SF6-free 245kV g3 gas-insulated substation (GIS) for onshore and offshore applications.
This third GE g3 (pronounced “g” cubed) gas project co-funding reflects the EU Commission’s commitment to accelerate the decarbonization of Europe’s electrical grids and prepare utilities for the EU’s stricter fluorinated (F)-gas regulation, which aims to cut F-gas emissions two-thirds by 2030.
GE’s LIFE SF6-FREE GIS project addresses the urgent need for reducing the use of SF6, a powerful greenhouse gas currently prevalent in high voltage equipment, with GE’s game-changing g3 gas technology. g3 equipment feature the same high performance and compact size as traditional SF6 products with a 99% reduced global warming potential.
Supporting this point, a recent EU Commission report concluded that fluoronitrile-based gas mixtures – such as g3 gas – may be the only insulating and switching gas alternative to SF6 when space is a constraint.
Addressing digitalization
GE’s LIFE SF6-FREE GIS project also addresses digitalization, which is another key challenge for the European high voltage grid. A grid becomes more complex when introducing intermittent sources, making proactive load balancing a key success factor. By integrating digital sensors in the primary equipment, the project is providing efficient data for grid operators moving toward more renewable sources. This becomes central to building a more resilient and robust grid. In addition, the replacement of conventional instrument transformers by a digital solution will deliver significant raw material savings, mainly in terms of copper and steel usage. This will not only limit the resource depletion but also further reduce the switchgear carbon footprint. The full benefits will be evidenced by a life cycle assessment (LCA) as part of the project.
Also read: GE Renewable Energy Lands Mandate For Wind Turbines From Continuum
Adoption of g3 products
Today, more than 30 leading electrical utilities have already adopted GE’s g3 products for their high voltage networks. Their adoption has the effect of eliminating the potential addition of more than 1 million tonnes of CO₂ equivalent to the grid. That is equal to removing about 476,000 petrol cars from the road for one year.
The new 245kV g3 GIS enhances GE’s SF6-free GIS range from 72.5kV to 420kV in 2024. GE’s g3 products are currently available for live-tank circuit-breakers and gas-insulated substations up to 145kV, as well as dual gas-insulated lines to 420kV.
