Journal article Open Access
A constrained wind farm controller providing secondary frequency regulation: An LES study
Boersma, Sjoerd;
Doekemeijer, Bart M;
Siniscalchi-Minna, Sara;
van Wingerden, Jan-Willem
Active power control for wind farms is needed to provide ancillary services. One of these services is to track a power reference signal with a wind farm by dynamically de- and uprating the turbines. In this paper we present a closed-loop wind farm controller that evaluates 1) thrust coefficients on a seconds-scale that provide power tracking and minimize dynamical loading on a farm level and 2) yaw settings on a minutes-scale that maximize the possible power that can be harvested by the farm. The controller is evaluated in a high-fidelity wind farm model. A six-turbine simulation case study is used to demonstrate the time-efficient controller for different controller settings. The results indicate that, with a power reference signal below the maximal possible power that can be harvested by the farm with non-yawed turbines, both tracking and reduction in dynamical loading can be ensured. In a second case study we illustrate that, when a wind farm power reference signal exceeds the maximal possible power that can be harvested with non-yawed turbines for a time period, it can not be tracked sufficiently. However, when solving for and applying optimized yaw settings, tracking can be ensured for the complete simulation horizon.
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- Publication date:
- November 19, 2018
- DOI:
-
- Keyword(s):
- Wind farm control model predictive control MPC FLORIS wake steering yaw control induction control turbine derating
- Published in:
- Renewable Energy: 134 pp. 639-652.
- Grants:
-
European Commission:
- CL-Windcon - Closed Loop Wind Farm Control (727477)
- License (for files):
- Creative Commons Attribution 4.0 International