US 10,890,159 B2
Dynamic controlled wind turbine shutdown
Fabio Caponetti, Åbyhøj (DK); Keld Hammerum, Hadsten (DK); and Jesper Lykkegaard Neubauer, Hornslet (DK)
Assigned to VESTAS WIND SYSTEMS A/S, Aarhus (DK)
Appl. No. 16/326,301
Filed by VESTAS WIND SYSTEMS A/S, Aarhus (DK)
PCT Filed Aug. 14, 2017, PCT No. PCT/DK2017/050262
§ 371(c)(1), (2) Date Feb. 18, 2019,
PCT Pub. No. WO2018/033190, PCT Pub. Date Feb. 22, 2018.
Claims priority of application No. 2016 70629 (DK), filed on Aug. 17, 2016.
Prior Publication US 2019/0203692 A1, Jul. 4, 2019
Int. Cl. F03D 7/02 (2006.01); F03D 7/04 (2006.01)
CPC F03D 7/0264 (2013.01) [F03D 7/0224 (2013.01); F03D 7/0276 (2013.01); F03D 7/0296 (2013.01); F03D 7/043 (2013.01); F05B 2270/309 (2013.01); F05B 2270/327 (2013.01); F05B 2270/334 (2013.01); Y02E 10/72 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method of controlling shutdown of a wind turbine having a rotor, the rotor comprising one or more wind turbine blades, the method comprising:
dynamically determining a rotor speed reference;
obtaining a measure of the rotor speed of the rotor and maintaining a constant rotor speed reference value when the rotor speed of a rotor is determined to be increasing;
obtaining a measure of a fore-aft movement of a wind turbine tower;
determining an error between the rotor speed reference and the rotor speed of the rotor; and
controlling a pitch of one or more of the wind turbine blades based on the determined error and the measured fore-aft movement of the wind turbine tower.