We describe a multi-layer architecture for the control of variable speed wind turbines, whereby each control layer targets a specific goal. The proposed architecture is inspired by the multi-objective nature of the wind turbine control problem. Three main goals are identified and associated with three distinct control loops: a) trimming and load alleviation for large scale gusts engulfing the whole rotor disk, targeted by a collective-pitch/torque controller; b) alleviation of deterministic slowly varying and low frequency loads, targeted by a higher harmonic controller operating in the frequency domain; and c) alleviation of non-deterministic loads caused by small spatial and fast temporal wind fluctuation due to turbulence. The proposed control architecture is demonstrated by means of various tests conducted in a high-fidelity simulation environment

Multi-Layer Control Architecture for the Reduction of Deterministic and Non-Deterministic Loads on Wind Turbines

BOTTASSO, CARLO LUIGI;CROCE, ALESSANDRO;RIBOLDI, CARLO;
2013

Abstract

We describe a multi-layer architecture for the control of variable speed wind turbines, whereby each control layer targets a specific goal. The proposed architecture is inspired by the multi-objective nature of the wind turbine control problem. Three main goals are identified and associated with three distinct control loops: a) trimming and load alleviation for large scale gusts engulfing the whole rotor disk, targeted by a collective-pitch/torque controller; b) alleviation of deterministic slowly varying and low frequency loads, targeted by a higher harmonic controller operating in the frequency domain; and c) alleviation of non-deterministic loads caused by small spatial and fast temporal wind fluctuation due to turbulence. The proposed control architecture is demonstrated by means of various tests conducted in a high-fidelity simulation environment
Wind turbine; Variable speed regulation; Pitch-torque control; Individual blade pitch control; Higher harmonic control; Aero-servo-elasticity
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11311/685416
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