| Work Detail |
Hollandse Kust Zuid Wind Farm, one of the worlds largest of its kind under construction
The latest Sep 2023
Rock berm installation works at Hollandse Kust Zuid offshore wind farm site in the Netherlands are set to begin in the fourth quarter of 2023 and be completed in the first quarter of 2025. The works will be carried out by DEME Offshore, a leading contractor in the fields of offshore energy, environmental remediation, dredging and marine infrastructure. The company was recently contracted by Sweden’s Vattenfall to carry out the work.
Prior to this appointment, Vattenfall had contracted Fugro to carry out IAC inspections and scour pad surveys. The surveys are still ongoing and are expected to be completed in October 2023.
Hollandse Kust Zuid Wind Farm Project Overview
Hollandse Kust Zuid Wind Farm (HKZ) is an offshore wind farm that has been under construction since 2021 on an approximately 235.8km² piece of land located about 18 kilometres off the coast of the Netherlands, in the area between The Hague and Zandvoort.
Dubbed “the Hollandse Kust (zuid) Wind Farm Zone (HKZWFZ)” the land is subdivided into four sites. Sites I and II cover a total area of approximately 115km², while sites III and IV span across 110km².
The wind farm is being developed by Vattenfall, a Swedish multinational power company owned by the Swedish State, at a cost of US$ 1.6bn and on a subsidy-free basis making the Hollandse Kust Zuid Wind Farm the first subsidy-free wind farm in Europe.
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A total of 140 units of the new SG 10.0-193 DD offshore wind turbines, featuring Integral Blade manufacturing and direct-drive technologies will be installed at the sites. The turbines, manufactured by Siemens Gamesa, have a rotor diameter of 193m, a blade length of 94m, a swept area of 29,300m², and a rated power of 10MW.
Upon completion, approximately in 2023, the Hollandse Kust Zuid Wind Farm will have a total generation capacity of 1.5MW. It will be the largest offshore wind farm in the Netherlands and the second largest in the world after the Dogger Bank Wind Farm which is under construction 125 to 290 kilometres in the North Sea, off the east coast of Yorkshire, England.
Dogger Bank Wind Farm is being developed by the Forewind consortium in two phases, Creyke Beck A and B is the first phase, and Teesside A and B is the second. Upon completion, the firm will have a total of four offshore wind farms, each with a capacity of up to 1.2 GW, for a combined capacity of 4.8 GW.
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Power transmission
The power generated by the turbines at the Hollandse Kust Zuid wind farm zone will be gathered and transmitted through 66kV cables to two offshore substations namely Hollandse Kust (zuid) Alpha and Hollandse Kust (zuid) Beta, each with AC connections of 700MW capacity.
At the substations, the power will be stepped up to 220kV and then transmitted onshore through two 220kV cables to the existing onshore 380kV Maasvlakte high-voltage substation, before being connected further to the south ring of the TenneT-operated Randstad 380kV line and then to the national high-voltage network for distribution.
TenneT is a leading European electricity transmission system operator (TSO), with activities in the Netherlands and Germany, and it will be responsible for the development and operation of the transmission infrastructure of the Hollandse Kust Zuid Wind Farm. |
