Hollandse Kust Zuid Beta Topside Sails Out of Dubai

The second offshore transformer station topside for the grid connection of the 1.5 GW Hollandse Kust Zuid offshore wind project has set sail from the Drydocks World Dubai’s fabrication facility in the United Arab Emirates.

In charge of the weighing, transport and load-out of the 700 MW, 3,950-tonne Hollandse Kust Zuid Beta topside is the heavy lift specialist Mammoet, which loaded the topside onto a Boskalis vessel last week.

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The High Voltage Alternating Current (HVAC) offshore transformer station is being delivered to TenneT by Petrofac, who also delivered the Hollandse Kust Zuid Alpha substation in cooperation with Drydocks World Dubai.

Hollandse Kust Zuid Alpha has been in place at its designated location offshore the Netherlands since December 2021.

The jacket foundation for the HKZ Beta platform was installed at the site in June 2021 and has recently suffered damage after an out-of-control cargo ship collided with it during Storm Corrie.

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“With the completion of the Beta topside, the offshore grid that TenneT is building in the North Sea is starting to take shape. Hollandse Kust Zuid is the first connection of an offshore wind farm to the Maasvlakte”, said Marco Kuijpers, Director of Large Projects Offshore for grid operator TenneT.

The offshore platform will form part of the Hollandse Kust Zuid (HKZ) grid connection that links the offshore wind farm zone to the Dutch mainland at the Maasvlakte.

Located 20 kilometers off the Dutch province of Zuid-Holland, the wind farm zone occupies an area of 235.8 square kilometres, where Vattenfall is building four wind farms as part of the HKZ project.

Once fully operational in 2023, the 1.5 GW Hollandse Kust Zuid will become the largest operating offshore wind farm in the world. Comprising 140 Siemens Gamesa 11 MW wind turbines, the subsidy-free wind farm will generate enough electricity to meet the annual needs of more than two million households.

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Photo: TenneT / Petrofac