TenneT's Hollandse Kust (Noord) topside rolled out

4C Offshore | Tom Russell
By: 14/09/2022 TenneT

From EQUANS' fabrication hall in Antwerp, the topside for TenneT's Hollandse Kust (Noord) transformer platform was placed on a floating barge in the port on Monday (12 September 2022). Following the load out, the over 3,500-tonne steel structure will be secured and prepared for transport to its final workplace at sea in the coming weeks.

During the load out, the topside was carefully steered past its 'cousin' for the German offshore wind farm Baltic Eagle on self-propelled trailers (SMTPs) on Monday. The special transport then drove from the quay onto a floating barge. After this successful load out, everything will be prepared in the coming weeks for the sail away, which will take place in late September/early October.

"After a two-day sea voyage, the topside will then be installed 18.5 kilometres off the coast of Egmond aan Zee. There, the undercarriage (jacket) has already been firmly anchored to the seabed since November last year,"
said Guus Siteur, offshore platform project manager for TenneT. "With the help of the installation vessel Orion, the topside of 47 metres long, 35 metres wide and 25 metres high will be placed on the undercarriage and then welded in place."

Two years after the first steel cut, the topside, built by the EQUANS/Smulders combination, is ready to be installed. it will transmit power generated by the
Hollandse Kust Noord wind farm ashore.

This makes it the first of the three topsides they are delivering. 'Noord' will be followed by 'West Alpha' and 'West Beta'.

From the offshore platofrms, each with a capacity of 700 MW, TenneT will bring offshore wind generated power to land in the coming years.


"The sea cables for 'north' are already ready in the seabed. Behind the dunes near Heemskerk/Wijk aan Zee, these will be connected to the cables that will soon feed the power into the high-voltage substation along the A9 in Beverwijk. This part of the cable link will also be completed in the coming months,"
Siteur added.


The Hollandse Kust Noord wind farm wind farm is expected to be operational by 2023 with an installed capacity of 759 MW, generating at least 3.3 TWh per year. The wind farm will be located 18.5 km off the Dutch coast, near the town of Egmond aan Zee. Is it being developed subsidy-free by the CrossWind consortium, a joint venture between Shell and Eneco. It will consist of 60 Siemens Gamesa
SG 11.0-200 DD turbines.

For more information on offshore wind farms worldwide, click here.