Control and management of high-power wind energy conversion system operating regimes: towards aerodynamic-compliant energy performance
Résumé
This paper approaches the management of operating regimes of high-power variable-speed variable-pitch wind energy conversion systems. Given that the control objectives ultimately depend on the wind speed regime, it i proposed that the power maximization objective specific to the partial-load operation to be achieved by means of rotor speed control, whereas the power limitation associated to the full-load regime to be reached by pitch servo-control. Because of specific complex dynamics resulted as interaction of a stochastic energy source and a large mechanical structure, smooth commutation between the two operating regimes must be ensured, for reasons of reliability and continuity of service. Moreover, the two control channels interact one with the other meanwhile being submitted to strongly variable and stiff power demand and stochastic disturbance. Matlab/Simulink simulation results are presented to support a preliminary validation of the proposed control strategy.