First turbine stands tall at Fryslân WF

Installation of the first rotor. © Windpark Fryslân. Photo by: Casper van der Kloet

With the installation of the rotor, the construction of the first of a total of 89 wind turbines in the 382.7 MW Fryslân offshore wind farm is a fact. The turbine installation was carried out by the purpose-built installation vessel Tom-Wim. In the coming months, the vessel, together with the Sarens Soccer Pitch, will continue with the installation of the other turbines. The wind farm is planned to be ready before the summer.

A total of 89 wind turbines from Siemens Gamesa Renewable Energy (SGRE) will be installed in the wind farm in the Frisian part of the IJsselmeer, near Breezanddijk. The turbines have a hub height of 115 meters, a tip height of 180 meters and an installed capacity of 4.3 MW. SGRE and Van Oord Offshore Wind, as partners in the Zuiderzeewind contractor consortium, are responsible for the construction of the wind farm. Earlier this year, the installation of the foundations on which the turbines are being placed was completed.

Buzzing activities on and around the IJsselmeer

Each wind turbine consists of three tower parts, the nacelle and the rotor. All turbine components are transported to the Alaska harbour in Amsterdam. Due to the width of the locks around the IJsselmeer, the wind turbine components are transported to the construction site from different places and by various ships.

The tower parts and the nacelle are transported directly to the construction site from Amsterdam. The three rotor blades are first assembled in Oude Zeug, west of the IJsselmeer. The complete rotor is then transported from Oude Zeug to the construction site on barges (such as the Wagenborg Barge 14) and is installed by the installation vessel Tom-Wim. After construction, every turbine is inspected from foundation to nacelle before it starts operation.

Inter array cables

While the turbine installation is now underway, the Zuiderzeewind consortium is also wrapping up the cable laying activities between the wind turbines. In total, approximately 92 km of inter array cable is being laid in the IJsselmeer. All turbines are connected to the transformer station on Breezanddijk from where the transformed electricity is transported to TenneT’s high voltage station in Oudehaske.

Fryslân will be ready to produce electricity before the summer of 2021. The 89 turbines will produce approximately 1.5 terawatt hours of green electricity annually. This corresponds to the energy consumption of approximately 500,000 households. In addition to the 89 wind turbines at Breezanddijk, the project consists of a newly constructed nature island at Kornwerderzand.