US 12,276,261 B2
Wind turbine control arrangement
Johannes Gerhardes Wardjan Alberts, Brøndby Strand (DK); and Bjarne Skovmose Kallesøe, Bagsværd (DK)
Assigned to SIEMENS GAMESA RENEWABLE ENERGY A/S, Brande (DK)
Appl. No. 17/924,233
Filed by Siemens Gamesa Renewable Energy A/S, Brande (DK)
PCT Filed Apr. 29, 2021, PCT No. PCT/EP2021/061218
§ 371(c)(1), (2) Date Nov. 9, 2022,
PCT Pub. No. WO2021/228561, PCT Pub. Date Nov. 18, 2021.
Claims priority of application No. 20174039 (EP), filed on May 12, 2020.
Prior Publication US 2023/0175485 A1, Jun. 8, 2023
Int. Cl. F03D 7/02 (2006.01); F03D 7/04 (2006.01); F03D 17/00 (2016.01)
CPC F03D 7/0276 (2013.01) [F03D 17/011 (2023.08); F03D 17/026 (2023.08); F03D 7/048 (2013.01); F03D 7/049 (2023.08); F03D 17/008 (2023.08); F05B 2270/101 (2013.01); F05B 2270/1011 (2013.01); F05B 2270/1016 (2013.01); F05B 2270/1033 (2013.01); F05B 2270/204 (2020.08); F05B 2270/327 (2013.01); F05B 2270/328 (2013.01); F05B 2270/329 (2013.01); F05B 2270/331 (2013.01); F05B 2270/332 (2013.01); F05B 2270/335 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A control arrangement for a variable-speed wind turbine constructed to fulfil requirements of a wind class as defined by IEC 61400-1, the control arrangement comprising:
a controller configured to:
analyze a plurality of environment values to establish whether a momentary wind turbine loading is lower than a loading threshold when a rotational speed of an aerodynamic rotor has reached a rated value, wherein a rated speed is associated with a level of output power that is less than a rated output power for a class of wind turbine; and
apply a speed increment to the rotational speed of the aerodynamic rotor if the wind turbine loading is lower than the loading threshold, and wherein a power/speed relationship follows an ideal trajectory for the class of wind turbine.
 
11. A method of operating a variable-speed wind turbine, the method comprising:
establishing whether a momentary wind turbine loading is lower than a loading threshold when a rotational speed of an aerodynamic rotor has reached a rated speed, wherein the rated speed is associated with a level of output power that is less than a rated output power for a class of wind turbine;
determining a speed increment for the rotational speed of the aerodynamic rotor on a basis of an ideal power/speed trajectory of the wind turbine if the wind turbine loading is lower than the loading threshold; and
increasing a rotor speed by the speed increment.