DEME Offshore has been awarded a substantial EPCI contract for the inter-array cables at the Dogger Bank A and Dogger Bank B windfarms in the UK
Dogger Bank A and B are the first two phases of the 3.6-GW Dogger Bank project, which is the world’s largest offshore windfarm under development.
The far-reaching scope includes engineering, procurement, construction and installation of the cables for the combined 2.4-GW windfarm. DEME Offshore will supply, install and protect 650 km of 66-kV inter-array cables and all related accessories.
Dogger Bank is located more than 130 km off the northeast coast of England and is currently being developed in three 1.2-GW phases by joint venture partners SSE Renewables and Equinor. Dogger Bank will be the world’s largest offshore windfarm when complete.
Production of the cable for Dogger Bank A and Dogger Bank B will start in 2021. It will be installed using the dynamic position DP3 cable installation vessel Living Stone.
DEME said Living Stone was selected based on the vessel’s significant cable capacity of more than 10,000 tonnes. The vessel has a DEME-designed dual-lane system, consisting of two cable highways – one for laying the cable and one where the next cable can be simultaneously prepared and have a cable protection system installed.
This approach to cable-laying significantly reduces the time needed for preparing cables, minimises manual handling, increases the vessel’s workability and improves production rates.
DEME Offshore said it will work closely with SSE Renewables and Equinor to engage with the UK supply chain in the delivery of the project.
Equinor vice president for Dogger Bank Halfdan Brustad said, “Dogger Bank is pioneering new technology and at the forefront of scaling up significant energy infrastructure.
“This contract, for the largest ever order for inter array cables, demonstrates the sheer scale of the project. When complete it will be able to generate around 5% of the UK’s electricity. The dual lane system on Living Stone means we can reduce the time needed to install the cables, which for a project of this size greatly helps to reduce costs.”
The contract with DEME Offshore is subject to the Dogger Bank joint venture partners SSE Renewables and Equinor reaching financial close on Dogger Bank A and Dogger Bank B, which is expected in late 2020.
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