01 Sep 2022
01 Sep 2022
Status: this preprint is currently under review for the journal WES.

Optimization of wind farm operation with a noise constraint

Camilla Marie Nyborg1, Andreas Fischer1, Pierre-Elouan Réthoré1, and Ju Feng2 Camilla Marie Nyborg et al.
  • 1Department of Wind and Energy Systems, Technical University of Denmark, Frederiksborgvej 399, 4000 Roskilde, Denmark
  • 2Department of Wind and Energy Systems, Technical University of Denmark, Nils Koppels Allé 403, 2800 Kongens Lyngby, Denmark

Abstract. This article presents a method for performing noise constrained optimization of wind farms by changing the operational modes of the individual wind turbines. The optimization is performed by use of the TopFarm framework and the PyWake wind farm modeling as well as two sound propagation models: the ISO 9613-2 model and the Parabolic Equation model, WindSTAR. The two sound propagation models introduce different levels of complexity to the optimization problem with the WindSTAR model taking a broader range of parameters, like the acoustic ground impedance, the complex terrain elevation and the flow field from the noise source to the receptor, into account. Thus, as the WindSTAR model introduces a higher complexity of the sound propagation computations, it likewise introduces a higher computational time. Wind farm optimization using each of the two sound propagation models is therefore performed in different atmospheric conditions and for different source/receptor setups, and compared through this study in order to evaluate the advantage of using a more complex sound propagation model. The article focuses on artificial wind farms in flat terrain as well as arbitrarily chosen dwellings at which the noise constraints are applied. By this, the study presents the potential of an optimization algorithm focusing on the sound propagation and wind farm operation trade-off.

Camilla Marie Nyborg et al.

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on wes-2022-80', Alessandro Fontanella, 15 Sep 2022
  • RC2: 'Comment on wes-2022-80', Anonymous Referee #2, 04 Oct 2022
  • AC1: 'Comment on wes-2022-80', Camilla Nyborg, 11 Nov 2022

Camilla Marie Nyborg et al.

Camilla Marie Nyborg et al.


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Short summary
Our article presents a way of optimizing the wind farm operation by keeping the emitted noise level below a defined limit while maximizing the power output. This is done by switching between noise reducing operational modes. The method has been developed by using two different noise models, one more advanced than the other, to study the advantages of each model. Furthermore, the optimization method is applied to different wind farm cases.