HKZ Alpha jacket arrives in the North Sea

In: GridWindfarms
The jacket and foundation piles for the Hollandse Kust Zuid (HKZ) Alpha HVAC substation have arrived in the North Sea, having travelled from the United Arab Emirates. The hoist ‘Sleipnir’ will lift the 3,200 tonne jacket and place it at sea, Petrofac reports.

Petrofac won a contract from TenneT in 2019, for the Hollandse Kust Zuid (HKZ) offshore grid connection, comprising for the Alpha and optional Beta HVAC platforms in the North Sea.

The Dutch government is targeting 3.5 GW of offshore wind by 2023 The HKZ installations are intended to help achieve this; Alpha is scheduled to become operational in 2021, and Beta the next year.

Vattenfall secured the rights to the
Hollandse Kust Zuid 1&2 and Hollandse Kust Zuid 3 & 4, in separate zero subsidy tenders in March 2018 and July 2019 respectively. The projects are located off the coasts of the Hague and Noordwijk.

Offshore construction is scheduled to start in 2021. The projects are to be fitted with approximately 140 units of Siemens Gamesa’s Direct Drive
SG DD-193 offshore turbines, with the ability to reach a capacity of 11 MW. The projects will have a combined capacity of 1,500 MW and are expected to meet the annual electricity consumption of around two million Dutch households. Offshore construction is scheduled to start in 2021. The turbines will be installed in 2022, with the project expected to be fully operational by 2023.

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