Control design based on aero-hydro-servo-elastic linear models from TURBU (ECN)

摘要

The ECN computer code TURBU generates elaborate linearised models for 3-bladed wind turbines. These models include the relevant features for control design and aeroealastic stability analysis; they are very well workable because of modally reduced blade tower models. Control loops for blade and tower load reduction were designed for a typical multi-MW wind turbine. A TURBU model was used for analytic examination of the closed loop performance and stability. These 'closed loop predictions' appeared valid when the control loops were evaluated in non-linear time domain simulation. These simulations showed significant load reduction and good closed loop stabilty. The fatigue loads in full load operation were reduced by 10% to 30% for the rotor blades and 4% to 6% for the tower.