US 12,173,692 B2
Method of operating a wind turbine and control system
Miguel Ángel Sepúlveda Gonzalez, Madrid (ES); and Mikel Tapia Pascal, Navarra (ES)
Assigned to Siemens Gamesa Renewable Energy Innovation & Technology S.L., Sarriguren (ES)
Appl. No. 17/918,231
Filed by Siemens Gamesa Renewable Energy Innovation & Technology S.L., Sarriguren (ES)
PCT Filed Apr. 16, 2021, PCT No. PCT/EP2021/059850
§ 371(c)(1), (2) Date Oct. 11, 2022,
PCT Pub. No. WO2021/209579, PCT Pub. Date Oct. 21, 2021.
Claims priority of application No. 20382305 (EP), filed on Apr. 16, 2020.
Prior Publication US 2023/0141320 A1, May 11, 2023
Int. Cl. F03D 7/00 (2006.01); F03D 7/02 (2006.01); F03D 9/25 (2016.01); H02P 9/00 (2006.01); H02P 9/10 (2006.01); H02P 101/15 (2016.01); H02P 103/10 (2016.01)
CPC F03D 7/028 (2013.01) [F03D 7/0224 (2013.01); F03D 7/0276 (2013.01); F03D 9/25 (2016.05); F05B 2220/706 (2013.01); F05B 2270/1033 (2013.01); H02P 9/007 (2013.01); H02P 9/105 (2013.01); H02P 2101/15 (2015.01); H02P 2103/10 (2015.01)] 12 Claims
OG exemplary drawing
 
1. A method of operating a wind turbine, wherein the wind turbine comprises a power generating system including a doubly-fed induction generator that converts rotational mechanical power to electrical power, wherein the method comprises:
operating the wind turbine in a first operational mode in which a speed of a rotor of the wind turbine is controlled to maximize the power generation by the wind turbine, wherein the first operational mode is a maximum power point tracking control mode in which an operating point is tracked at which capturing of power from the wind by the wind turbine is maximized; and
switching from the first operational mode to a second operational mode upon a monitored parameter moving downward and reaching or dropping below a respective threshold from a higher level, and operating the wind turbine in a second operational mode,
wherein the monitored parameter includes at least one of the rotational speed of the rotor, the rotational speed of the doubly-fed induction generator, a wind speed, an active electrical power produced by the doubly-fed induction generator, or generator torque, and
wherein operating the wind turbine in the second operational mode comprises increasing the rotational speed of the doubly-fed induction generator at the expense of the generation of active electrical power by the power generating system, wherein in the second operational mode, the maximum power point tracking is disabled and the wind turbine is not operated at the maximum power point for the respective wind speed, and
wherein the method further comprises:
resuming operation of the wind turbine in the first operational mode upon the monitored parameter reaching or exceeding a respective second threshold by moving back upward from the respective threshold.