US 12,031,522 B2
Controlling a wind turbine with a scaled power coefficient
Sebastiaan Mulders, Rotterdam (NL); Fabio Spagnolo, Aarhus C (DK); Jesper Sandberg Thomsen, Hadsten (DK); Julio Xavier Vianna Neto, Skødstrup (DK); Jan-Willem Van Wingerden, Barendrecht (NL); and Livia Brandetti, Delft (NL)
Assigned to VESTAS WIND SYSTEMS A/S, Aarhus N (DK)
Filed by VESTAS WIND SYSTEMS A/S, Aarhus N (DK)
Filed on Nov. 1, 2023, as Appl. No. 18/499,397.
Claims priority of application No. 22205531 (EP), filed on Nov. 4, 2022.
Prior Publication US 2024/0159216 A1, May 16, 2024
Int. Cl. F03D 7/02 (2006.01); F03D 1/00 (2006.01); F03D 7/04 (2006.01)
CPC F03D 7/0224 (2013.01) [F03D 1/00 (2013.01); F03D 7/042 (2013.01); F05B 2220/30 (2013.01); F05B 2270/101 (2013.01); F05B 2270/32 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method of controlling a wind turbine in a partial load operation mode based on a tip-speed ratio (TSR) tracking scheme which based on an estimated wind speed determines a power setpoint, the estimated wind speed being determined based on a power or torque balance between an aerodynamic power or torque of a rotor of the wind turbine and an electrical power or torque of a generator of the wind turbine, wherein the TSR tracking scheme ensures operation in accordance with an operating power coefficient, and wherein the operating power coefficient has been adjusted in an adjustment process,
the adjustment process comprises:
setting a scaled power coefficient as a predetermined power coefficient multiplied by a scaling factor;
adding a time-varying perturbation signal to the power setpoint;
determining a transfer function from the time-varying perturbation signal to a power error, the power error being determined as a difference between an operating rotor power and an estimated rotor power;
evaluating a frequency response of the transfer function over a time period to determine the scaling factor which minimizes a gain of the transfer function; and
setting the operating power coefficient as the scaled power coefficient.