Design of a Wind Turbine Pitch Controller for Loads and Fatigue Reduction (CROSBI ID 528251)
Prilog sa skupa u zborniku | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Jelavić, Mate ; Perić, Nedjeljko ; Petrović, Ivan ; Car, Stjepan ; Mađerčić, Miroslav
engleski
Design of a Wind Turbine Pitch Controller for Loads and Fatigue Reduction
Wind turbines are constantly growing in size and power output level. This growth results in significant increase of structural loads and fatigue that have become limiting factors in wind turbine design. It introduces a need to control and limit structural loads and fatigue during wind turbine operation. This can be done by careful control system design. In this paper we focus on variable speed pitch controlled wind turbine that is today an industrial standard. A design procedure for three types of pitch controller is described and their performance is tested by simulations. Like first classic PID controller is described that aims only at achieving satisfactory rotor speed control. This classic pitch controller is then augmented and reduction of tower oscillations is used as additional demand during controller design. Two controller concepts used for this purpose are compared – SISO and full state feedback controller. Both controllers are designed by pole placement method that assures closed loop system to behave in desired manner. Desired closed loop system behavior is carefully chosen in such a way that controlled system behaves as if its structural damping has increased. It results in reduced tower motion what leads to loads and fatigue reduction. All controllers described in this paper are linear so an adaptation algorithm is needed to account for nonlinear nature of wind turbine. For this purpose we propose the use of Takagi-Sugeno fuzzy model that calculates process model output as a combination of "local" linear models identified in chosen operating points.
Wind turbine; pitch control; loads; fatigue; tower oscillations
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Podaci o prilogu
10 stranica (10-x.
2007.
objavljeno
Podaci o matičnoj publikaciji
Proceedings of the European Wind Energy Conference & Exhibition, EWEC 2007
Milano:
Podaci o skupu
European Wind Energy Conference & Exhibition, EWEC 2007
poster
07.05.2007-10.05.2007
Milano, Italija