Reducción de las oscilaciones de cabeceo de un aerogenerador flotante mediante control del ángulo de paso de pala

Laburpena

Floating offshore wind turbines suffer oscillations due to external disturbances, mainly waves and strong winds, which in the short-term have been shown to reduce efficiency and in the long-term cause mechanical fatigue. These vibrations can be reduced by using active control. For the design of efficient controllers for these complex and non-linear devices, in this work a model based on transfer functions is developed, along with its identification. Synthetic realistic data have been generated using OpenFAST turbine simulation software. Using data from a 5-MW barge-type floating wind turbine, a six-degree-of-freedom model suitable for control system design is identified. A classical control analysis is carried out for the roll and pitch degrees of freedom of the floating turbine, concluding that the roll requires a co-design of the system, but the pitch does allow effective control. The results obtained with a PD over the blade pitch angle actuator are presented, which will serve as a baseline for the development of other controllers.