However, launching a facility of this scale requires something the current grid cannot provide: a reliable 400 kV power transmission connection that can deliver around 500 MW to meet the high electricity demand.
Connecting the harbour to Fingrid’s Rauma substation meant navigating a complex mix of land use constraints, environmental considerations, and technically demanding terrain, including overland, underground, and subsea route segments.
Fortum, which is supporting the grid connection planning and implementation for the project, selected Omexom in Findland to carry out the general design for the 400 kV transmission link, building on our earlier involvement in the preliminary planning phase. The connection covers about 11.5 kilometers in total and includes three segments: around 1.5 km of overhead line, approximately 7.5 km of underground cable, and roughly 2.5 km of subsea cable leading into the harbour. Thorough preliminary planning established the route options, technical solutions, and implementation methods within the boundaries set by land use and environmental values, forming the basis for a technically and economically sound design.
With general design work set to finish in 2027 and the e-fuels facility expected to start operations in 2031, this project builds the power infrastructure foundation for one of Finland’s most innovative industrial sites. The 500 MW transmission capacity will allow for large-scale electrification at Rauma Harbour and will support Norsk e-Fuel’s entire project development, construction, and operational phases.
This project is a strong example of how complex, multi-segment transmission solutions can unlock the energy transition at an industrial level. As ports and industrial zones across Europe electrify and seek grid connections capable of powering the next generation of clean energy infrastructure, projects like Rauma point the way forward.
Discover how Omexom in Finland is helping achieve energy transition across the country through innovative infrastructure projects. Explore more at https://www.omexom.fi/.
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