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Borssele V innovation project fully commissioned

4C Offshore | Tom Russell
By: Tom Russell 25/02/2021 Van Oord

Two Towers, consisting of Van Oord, Investri Offshore and Green Giraffe, has announced that the
Borssele V innovation project has been fully commissioned. Located 20 km off the coast of the Netherlands, the site features two V164-9.5 MW turbines, generating energy to provide renewable energy to 25,000 Dutch households.  

Several innovations are incorporated at the Borssele Wind Farm Site V. It is the first time anywhere that a submerged slip joint has been used on a full-sized offshore wind turbine on a fully commercial basis. The design and manufacturing of the Slip Joint were certified by DNVGL in the autumn of 2019.


At the Borssele V Site, technologies such as thermally sprayed aluminium (TSA), impressed current cathodic protection (ICCP) optimisation and oval cable entry holes are also incorporated. The seabed surrounding the two Borssele V wind turbines is fitted with eco-friendly scour protection. This technology is used to explore how nature and renewable energy generation can be mutually enhancing. Oysters will be placed on the protective layer of rock on the seabed to improve biodiversity and the natural habitat for aquatic wildlife.

"We are extremely pleased to have finished the construction phase of our project on time, within budget and with a seamless implementation of the technical innovations. This would not have been possible without the strong cooperation from our construction partners Van Oord and Vestas and with respect to the grid connection, TenneT. Our applied innovations will not only contribute to a further reduction of LCOE of Offshore Wind but also improve the Health & Safety profile of the industry,"
said Erik de Boer, Managing Partner, Investri.

Two Towers has also entered into a partnership with Dutch energy company Vandebron. This partnership means that consumers can purchase renewable electricity directly from this project.

"Through the deployment of several important design improvements, in particular the slip joint, Two Towers plays an important role in further reducing the LCOE of offshore wind. Supporting partners in implementing their innovative projects is in our DNA. Green Giraffe is proud to have contributed to this exciting project and congratulates all parties involved in reaching this important milestone,"
commented Niels Jongste, Managing Director at Green Giraffe.

Van Oord is the Balance of Plant contractor for this project. The project has been completed on time and within budget during the COVID-19 pandemic. Van Oord deployed a wide range of equipment at the project, including offshore installation vessel
Aeolus, the trencher Dig-It and cable-laying vessel Nexus. All the innovations at the site  have been developed by Van Oord in cooperation with other research partners. The slip joint is a full in-house design by Van Oord.

"We are very proud to have reached this milestone. Our team did an excellent job and the good cooperation with Blauwwind, our neighbours at Borssele offshore windfarm III & IV, was of great importance for the execution of this project,"
said Jan-Willem Elleswijk, Director Van Oord Offshore Wind.


For more information on installation and maintenance of major offshore wind farm components,
click here.

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