Dogger Bank HVDC Substation

Heerema to Install Dogger Bank C Offshore Substation

Heerema Marine Contractors will transport and install the Dogger Bank C offshore substation under a contract awarded to the company by the Dogger Bank Wind Farm joint venture partners SSE Renewables, Equinor, and Eni.


For the third phase of the 3.6 GW Dogger Bank Wind Farm, Heerema will transport and install the project’s 3,500-tonne jacket foundation, four main piles, and the 9,500-tonne offshore substation topside.

The company will perform offshore lifting to position the jacket foundation on the scour bed, using main piles to provide jacket on-bottom stability. The offshore substation will be lifted from a barge prior to the set-down on the jacket foundation.

“Installation of the offshore substation on the third phase of Dogger Bank Wind Farm will be a significant moment for our world-leading project. We welcome Hereema to our strong team of tier-one suppliers, and we look forward to working with them to install this innovative platform on the DBC site”, said Steve Wilson, Project Director for Dogger Bank Wind Farm.

Heerema’s Wind Director, Jeroen van Oosten, said: “Installing sizeable offshore substations is core business for Heerema Marine Contractors and we are looking forward to working together on the preparation and installation of Dogger Bank C”.

The three Dogger Bank projects will use what the developers say are the world’s first unmanned High Voltage Direct Current (HVDC) offshore substations, to be delivered by Aibel. The platforms will be operated from shore and accessed only by SOV (Service Operations Vessel).

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Aibel was selected to deliver the two platforms for the 2.4 GW Dogger Bank A and B in October 2019, with an option for one more for the 1.2 GW Dogger Bank C. The contract for the first two platforms was signed in November 2020 after SSE Renewables and Equinor reached financial close for the first two wind farms, with Dogger Bank C following at the beginning of 2021.

The company will deliver the Dogger Bank A substation in Q2 of 2023, Dogger Bank B is scheduled for Q2 of 2024, and the Dogger Bank C offshore platform is expected to be delivered in Q2 2025.

In 2020, Saipem signed a deal with the Dogger Bank Wind Farm joint venture for the transportation and installation of two offshore HVDC offshore substations for Dogger Bank A and Dogger Bank B.

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