US 12,467,431 B2
Torque limiter based on current torque value
John Schwensen, Aarhus N (DK); Sara Siniscalchi Minna, Aarhus C (DK); and Tobias Gybel Hovgaard, Ry (DK)
Assigned to VESTAS WIND SYSTEMS A/S, Aarhus N (DK)
Appl. No. 18/725,669
Filed by VESTAS WIND SYSTEMS A/S, Aarhus N (DK)
PCT Filed Dec. 22, 2022, PCT No. PCT/DK2022/050308
§ 371(c)(1), (2) Date Jun. 28, 2024,
PCT Pub. No. WO2023/126043, PCT Pub. Date Jul. 6, 2023.
Claims priority of application No. PA202170675 (DK), filed on Dec. 29, 2021.
Prior Publication US 2025/0163884 A1, May 22, 2025
Int. Cl. F03D 7/02 (2006.01)
CPC F03D 7/0224 (2013.01) [F05B 2270/327 (2013.01); F05B 2270/335 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of controlling a wind turbine, comprising:
determining a control signal for controlling the wind turbine;
determining a current torque value of a rotor of the wind turbine and comparing the current torque value to an upper torque limit value, and when the current torque value is larger than the upper torque limit value, modifying the control signal so that a resulting torque value of the rotor is reduced, wherein the current torque value and previous torque values are included in a torque signal;
wherein the upper torque limit value is based on a lower envelope signal comprising previous lower envelope values and a current lower envelope value, the lower envelope signal tracks the current torque value when the current torque value is lower than or equal to a previous lower envelope value of the previous lower envelope values and is set as a rising signal when the current torque value is higher than the previous lower envelope value, and wherein the upper torque limit value is set to be a first amount higher than the lower envelope signal; and
controlling the wind turbine based on the control signal so that the resulting torque value of the rotor is changed.