Deliverable D3.3: Demonstration of wind turbine controllers and supporting technologies by simulations

The main objectives of this deliverable have been to support the development of new wind farm control approaches and to provide new measures of wake interactions in order to contribute to an optimized operation of the wind farm. To realize new control strategies on wind farm level, supplementary controller and adaptions to existing controllers are needed. This part of the project presents simulation results using the CL-Windcon baseline controller, supplementary control strategies on wind turbine level as well as observers on turbine level.

The control methodologies that have already been developed during the project are analyzed and simulations are conducted during this process. Firstly, the CL-Windcon wind turbine baseline controller was analyzed at different wind speed conditions. Secondly, different power derating strategies are compared that are later used in the project to realize axial induction control and smart power curtailment in the wind farm. One of the most important points was about the lidar-based closed-loop wake control concept. This was analyzed in frequency domain and simulations are performed to test the adaption of the controller to a disturbance. Finally, a reliability enhancing method is studied in simulation at different wind speeds to show its reaction to specific events.

Altogether, the different analyses and concepts treated during this deliverable have provided new prospects in operating the wind farm in an optimized way. Furthermore they represent an intermediate layer between novel farm control strategies and single wind turbine operation in the wind farm and therefore offer the possibility to leverage new wind farm control strategies.

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