Wind turbine with a rotor positioning system
AssigneeGamesa Innovation & Technology, S. L.
InventorsEugenio Plano Morillo, Ignacio Fernandez Romero
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Abstract
The invention provides a wind turbine having a system for positioning the rotor in an azimuthal reference position Azref and for maintaining it therein for a predetermined period of time, the wind turbine being arranged in test mode. Said rotor positioning system comprises a first controller (31) configured to generate a generator speed reference Ωref from the difference between the rotor azimuthal reference position Azref and the rotor azimuthal measured position Azmeas and a second controller (35) configured to generate a generator torque reference Tref from the difference between said generator speed reference Ωref and the generator speed measured Ωmeas.
Claims5
A wind turbine (11) comprising:
- (a) a tower (13) and a nacelle (21) housing a generator (19) connected to a rotor comprising a rotor hub (15) and at least one blade (17), wherein the generator is configured to act as a motor;
- (b) measuring devices of, at least, wind speed V, generator speed Ω and rotor azimuthal position Az;
- (c) a control system connected to said measuring devices and to at least pitch and torque control actuators;
- (d) a system for positioning the rotor in an azimuthal reference position Azref and for maintaining it therein during a predetermined period of time when the wind turbine is in a test mode, the system comprising:
- (i) a first controller (31) configured to generate a generator speed reference Ωref from a difference between the azimuthal reference position Azref and a rotor azimuthal measured position Azmeas and proportional and integral gains Kp1 and Ki1 that are dependent on the wind speed V measured at a height of the rotor hub;
- and
- (ii) a second controller (35) configured to generate a generator torque reference Tref from a difference between said generator speed reference Ωref and a generator speed measured position Ωmeas and proportional and integral gains Kp2 and Ki2 that are dependent on the wind speed V measured at the height of the rotor hub,
- wherein the first and second controllers, when activated, maintain a torque that keeps the rotor in the azimuthal reference position Azref during the test period.
Dependencies are inferred from the claim text.