Hornsea Two offshore construction kicks off

In: Windfarms
Ørsted’s Hornsea Two offshore wind farm has seen its first significant infrastructure installed offshore. The first 4,800 tonne jacket has now been lifted and installed in to its final position for the site's offshore substation.

Six weeks ago, 10,000 tonnes of steel framework for the wind farm’s pin piles, reactor compensation and offshore substation jackets sailed from Batam in Indonesia to the UK.

Patrick Harnett, Ørsted's Senior Programme Director for Hornsea Two, said: ”We’re delighted to announce that we’ve now officially commenced our offshore construction for Hornsea Two with the installation of our offshore substation and reactor compensation jackets.

"Through a remarkable feat of engineering together with our partners, we’ve overcome COVID challenges and are on track for fabricating the world’s largest AC offshore substation, which will be supported by this gigantic steel structure. The ambition and capability of our teams across the world has been remarkable as we continue to overcome obstacles with safe and efficient solutions.”

Hornsea Two will surpass its predecessor Hornsea One and become the world's largest offshore wind farm. It will be capable of generating 1.4 GW of clean energy once complete in 2022.

Monopile works are due to commence at the wind farm location, 89 km from landfall this month with DEME Group’s offshore installation vessel,
Innovation. Besides Innovation, Pacific Orca will also begin works on location next year to support construction. Both are heavy-lift jack up vessels which have legs that can securely fix the ship to the seabed, raise the vessel from the water whilst onboard cranes lift and manoeuvre the heavy foundation components.

In total, 165 monopiles and transition pieces will be installed at sea in preparation for the site’s 8.4 MW turbines. With a height from sea level to blade tip of 204 metres, the turbines will also feature new 82 metre long blades, which are currently being fabricated at the Siemens Gamesa Renewable Energy blade factory in Hull.

Around 30 transition pieces are being manufactured at EEW OSB’s factory in Teesside, with the first load out having recently been completed, whilst Denmark-based Bladt is suppling the additional 135 components.

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