Oss Foundation Installation

Dogger Bank Wind Farm and its partners completed the installation of the high-voltage direct current (HVDC) offshore substation jacket foundation for Dogger Bank C in May 2025. According to Windtech International, the four-legged steel jacket was successfully placed on the seabed at an average depth of 23 metres and completed about a week before the topside installation operation. This jacket forms the dedicated foundation for the Dogger Bank C offshore substation platform, which was manufactured and supplied by Aibel and subsequently installed offshore using Heerema Marine Contractors’ heavy-lift vessel Sleipnir. The foundation installation ensured that the structure was ready to receive the large topside, which measures approximately 75 by 50 metres and stands 36 metres high. Completion of the jacket installation for Dogger Bank C’s HVDC offshore substation marked the foundational step in the final substation installation across all three 1.2 GW phases of the Dogger Bank project—Dogger Bank A, B and C. With the jacket in place and the topside installed shortly afterwards, the project’s focus can shift to commissioning activities to prepare the platform for power transmission. Once fully commissioned, each substation platform will receive up to 1.2 GW of alternating current (AC) from the offshore turbines, convert it to direct current (DC), and transmit it to the onshore converter stations near Beverley in East Riding of Yorkshire and near Redcar on Teesside. Dogger Bank Wind Farm is being developed as a joint venture between SSE Renewables (40%), Equinor (40%), and Vårgrønn.