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Modelling and Optimisation of two Wind Turbines in a Row


Flavio Heer

Semester Thesis, FS13 (10283)

In wind farms the power capture of downwind turbines is decreased due to the wake effect caused by upwind turbines. This semester thesis focuses on optimising the overall power capture of two wind turbines in a row for below rated wind speeds in the control region 2 by regarding the wake effect in the control of the upwind turbine. The dynamics of the 5MW offshore three-bladed horizontal axis wind turbine are described by a non linear state space model which is validated with a comparison to the Fatigue, Aerodynamics, Structures, and Turbulence simulator for wind turbines (FAST). Based on the dynamic model a model predictive controller (MPC) for a single wind turbine is developed with the same control objectives as the commonly used feedback controller, but the current wind speed measurements implemented as an additional information for the controller. For the control of two wind turbines in a row the set points of the upwind turbine MPC controller are adjusted to reach an optimal trade-off between maximising the power capture of the upwind turbine and minimising the wake effect on the downwind turbine. Simulations show that the MPC controller for one wind turbine behaves similar to the commonly used feedback controller. However, for two wind turbines in a row the overall power capture can be increased significantly by adjusting the set points of the upwind turbine controller.


Type of Publication:

(13)Semester/Bachelor Thesis

P. Mohajerin Esfahani

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% Autogenerated BibTeX entry
@PhdThesis { Xxx:2013:IFA_4437
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