US 11,746,756 B2
Operating a wind turbine during service
Søren Dalsgaard, Hadsten (DK); Torben Ladegaard Baun, Skødstrup (DK); Keld Hammerum, Hadsten (DK); and Torben Petersen, Åbyhøj (DK)
Assigned to VESTAS WIND SYSTEMS A/S, Aarhus N (DK)
Appl. No. 17/266,934
Filed by VESTAS WIND SYSTEMS A/S, Aarhus N (DK)
PCT Filed Jul. 9, 2019, PCT No. PCT/DK2019/050225
§ 371(c)(1), (2) Date Feb. 8, 2021,
PCT Pub. No. WO2020/030235, PCT Pub. Date Feb. 13, 2020.
Claims priority of application No. PA 2018 70519 (DK), filed on Aug. 7, 2018.
Prior Publication US 2021/0301794 A1, Sep. 30, 2021
Int. Cl. F03D 80/50 (2016.01); F03D 7/02 (2006.01); F03D 1/02 (2006.01)
CPC F03D 80/50 (2016.05) [F03D 1/02 (2013.01); F03D 7/0224 (2013.01); F03D 7/0264 (2013.01); F03D 7/0276 (2013.01); F05B 2240/37 (2020.08); F05B 2260/70 (2013.01); F05B 2270/3201 (2013.01); F05B 2270/327 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method of operating a wind turbine during a service, wherein the wind turbine comprises a rotor-nacelle assembly comprising a rotor, the method comprising:
detecting, based on data from one or more sensors embedded within a wind turbine, that a service is to be or is being carried out on the rotor-nacelle assembly of the wind turbine by detecting a selection of the rotor-nacelle assembly for service, and detecting a presence of personnel in a vicinity of the rotor-nacelle assembly; and
on detecting that the service is to be or is being carried out on the rotor-nacelle assembly:
reducing an operating level of the rotor-nacelle assembly; and
reducing an overspeed threshold or an overpower threshold of the rotor by an amount greater than an amount by which the operating level of the rotor-nacelle assembly is reduced.