Wind turbine control method to dampen vibrations

摘要

Wind turbine control method, of variable speed, which comprises a rotor (1, 9), a power train coupled to the rotor (3, 11) and a converter (4, 12) connected to the generator, by means of which generator torque or power is controlled, and having a control unit (7) that calculates an initial torque (Tref) or power instruction for the converter based on a method that comprises the following steps: calculation of an initial torque instruction (Ti), calculation of a torque adjustment term (Taj) and calculation of a final torque instruction (Tref); in addition to the following steps: estimation of the maximum evacuable active power (Pev) based on power grid voltage (Vnet), estimation of a maximum probable value for the adjustment term (Tajmax), calculation of a limit value of the initial torque instruction (Timax) and application of said limit value (Timax) to the initial torque instruction (Ti), thereby reserving a torque or power margin so that the adjustment term dampens the vibrations of the transmission system.