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Wind Energy Science The interactive open-access journal of the European Academy of Wind Energy
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We use data from the Alpha Ventus offshore wind farm to investigate the effects of inter-farm interactions. We show how measured quantities like turbulence intensity, wind speeds, shear, and turbine structural loading are evolving from the period where the park was operating alone to the period where new farms operate in close proximity. In the directions influenced by the neigboring farms increased turbulence intensity, reduced wind speeds, and increased structural loading is observed.
Preprints
https://doi.org/10.5194/wes-2021-50
https://doi.org/10.5194/wes-2021-50

  28 May 2021

28 May 2021

Review status: this preprint is currently under review for the journal WES.

On the effects of inter-farm interactions at the offshore wind farm Alpha Ventus

Vasilis Pettas, Matthias Kretschmer, Andrew Clifton, and Po Wen Cheng Vasilis Pettas et al.
  • Stuttgart Wind Energy (SWE), University of Stuttgart, Allmandring 5b, 70569 Stuttgart, Germany

Abstract. The energy transition means that more and more wind farms are being built in favorable offshore sites like the North Sea. The wind farms affect each other as they interact with the boundary layer flow. This phenomenon is a topic of current research by the industry and academia as it can have significant technical and financial impacts. In this study we use data from the Alpha Ventus wind farm site to investigate the effects of inter-farm interactions. Alpha Ventus is the first offshore German wind farm located at the North Sea with a fully equipped measurement platform FINO1 in the near vicinity. We look at the effects on the wind conditions measured at FINO1 before and after the beginning of operation of the neighboring farms. We show how measured quantities like turbulence intensity, wind speed distributions, and wind shear are evolving from the period where the park was operating alone in the area to the period where farms were built and operate in close proximity (1.4–15 km). Moreover, we show how the wind turbine performance is affected using data from a turbine that is in the vicinity of the mast. The results show the wake effects in the directions influenced by the wind farms according to their distance with increased turbulence intensity, reduced wind speeds, and increased structural loading.

Vasilis Pettas et al.

Status: open (until 09 Jul 2021)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse

Vasilis Pettas et al.

Vasilis Pettas et al.

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Short summary
We use data from the Alpha Ventus offshore wind farm to investigate the effects of inter-farm interactions. We show how measured quantities like turbulence intensity, wind speeds, shear, and turbine structural loading are evolving from the period where the park was operating alone to the period where new farms operate in close proximity. In the directions influenced by the neigboring farms increased turbulence intensity, reduced wind speeds, and increased structural loading is observed.
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