Seagreen offshore wind farm
The Seagreen Offshore Wind Farm is a joint venture between TotalEnergies, a global energy major, and SSE Renewables, a leading developer and operator of renewable energy across the UK and Ireland.
Seagreen will be Scotland’s largest and the world’s deepest offshore wind farm when completed. The wind farm is located 27 kilometres off the coast of Angus, Scotland in the North Sea, and will consist of a total of 150 turbines (114 in Phase 1 and 36 in Phase 1A). Total development costs amount to £3 billion. The 114 wind turbines in Phase 1 will provide enough green energy to power more than 1.6 million homes, which is equivalent to almost two-thirds of all Scottish homes.
Ramboll was appointed by TotalEnergies and SSE Renewables to provide the detailed design services for the foundation sub-structures, including:
- Supporting the ground investigation and production of the geotechnical interpretive report
- Jacket transition piece and suction caissons design (including soil-caissons interaction)
- Upending, lifting and installation assessment
- Jack-up interaction study between spudcan and caissons
- Transportation assessment covering sea fastening and grillage study to ferry the foundations from Asia to Europe
- Low-voltage system and electrical design
- Providing support during fabrication and installation phases
- Installation risk mitigation support, including assessment of installation using pressure cycling and micrositing of foundations
Towards Scotland’s net-zero ambitions
The Seagreen wind farm was in 2014 granted consent for Phase 1 to construct 114 wind turbines with an installed capacity of 1,075 MW. The turbines will connect to the UK national electricity transmission system via consented export cables and inshore transmission works at a new substation at Tealing in Angus, Scotland. The remaining 36 offshore wind turbines under Phase 1A are now consented as well, and the power from these will be exported to the grid via the substation Cockenzie in East Lothian, Scotland.
The renewable energy from the 114 turbines in Phase 1 will replace electricity generated by fossil fuels, which will lead to a reduction in CO2 emissions of over 2 million tonnes every year. It is equivalent to removing more than a third of all Scotland’s annual car emissions and represents an important contribution to Scotland’s ambitions to reach Net Zero by 2045.
In December 2020, Ramboll was also appointed as the Environment and Consents Manager for Seagreen 1A Onshore Transmission Works, which will secure grid connection for the remaining 36 wind turbines.
The first 114 offshore wind turbines of the project are expected to be fully operational by early 2023.
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