The jacket foundation and the topside for Dogger Bank C, the third phase of the 3.6 GW Dogger Bank Wind Farm , have been installed in the UK.
According to the recent Notice to Mariners from the project, Heerema Marine Contractors’ semi-submersible crane vessel Sleipnir installed the jacket foundation and the topside at the Dogger Bank C site.
The substation platform, which measures 75×50 metres across and 36 metres high, will undergo a commissioning phase until approximately 11 September 2025.
The HEA Hydra vessel will jack up and connect to the Dogger Bank C platform by a fixed gangway. The ship will remain on site during the commissioning phase, acting as the accommodation platform and emergency evacuation vessel. The platform supply vessel (PSV) FS Balmoral will support HEA Hydra , carrying out regular supply runs to the offshore site.
The loadout of the substation jacket was completed at Navantia Seanergies’ Puerto Real facilities in Spain in April this year. Aibel awarded Navantia Seanergies the engineering, procurement, and construction (EPC) work as a subcontractor.
Heerema Marine Contractors was responsible for the installation of the jacket foundation, main piles, and the topside for Dogger Bank C under a contract inked with the developers in March 2022.
The substations for Dogger Bank A and Dogger Bank B are already installed at the site located more than 130 kilometres off the Yorkshire coast in the UK. All three substations are fitted with Hitachi Energy’s latest HVDC converter technology and are designed to be operated from shore and accessed only by a Service Operations Vessel (SOV).
Each of the three platforms will be capable of receiving 1.2GW of AC power generated by Dogger Bank’s offshore wind turbines and converting that renewable energy to DC, before sending that renewable power ashore to three onshore converter stations, near Beverley in the East Riding of Yorkshire and near Redcar on Teesside.
The installation of the monopiles at Dogger Bank C began in April this year. The work is being carried out by Seaway7’s Seaway Strashnov and is expected to continue until approximately the fourth quarter of 2025. So far, 14 out of 87 units are placed on the seabed, according to the notice.
Dogger Bank Wind Farm is owned by SSE Renewables (40 per cent), Equinor (40 per cent), and Vårgrønn (20 per cent).
The first two 1.2 GW phases will comprise 95 Haliade-X 13 MW wind turbines each, and Dogger Bank C will feature 87 Haliade-X 14 MW turbines.
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