US 12,234,807 B2
Reducing noise emissions of a wind turbine
Nicolaj Winther Johansen, Hinnerup (DK); Mranal Gupta, Tilst (DK); Kaj Dam Madsen, Aarhus C (DK); Brian Ank Mertz, Aarhus C (DK); and Claus Thy Henningsen, Hornslet (DK)
Assigned to VESTAS WIND SYSTEMS A/S, Aarhus N (DK)
Appl. No. 18/250,954
Filed by VESTAS WIND SYSTEMS A/S, Aarhus N (DK)
PCT Filed Oct. 26, 2021, PCT No. PCT/DK2021/050316
§ 371(c)(1), (2) Date Apr. 27, 2023,
PCT Pub. No. WO2022/089703, PCT Pub. Date May 5, 2022.
Claims priority of application No. PA 2020 70710 (DK), filed on Oct. 27, 2020.
Prior Publication US 2023/0400011 A1, Dec. 14, 2023
Int. Cl. F03D 7/02 (2006.01)
CPC F03D 7/0296 (2013.01) [F05B 2260/96 (2013.01); F05B 2270/402 (2013.01); F05B 2270/504 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of reducing noise emissions of a wind turbine, the method comprising:
receiving data indicative of wind conditions in the vicinity of the wind turbine;
determining an operational set point signal in accordance with a desired operation of the wind turbine, the operational set point signal being determined in dependence on the received data;
applying a perturbation signal to the operational set point signal to obtain a modified operational set point signal; and,
controlling operation of the wind turbine using the modified operational set point signal to reduce noise emissions of the wind turbine,
wherein the perturbation signal is applied such that a signal characteristic has greater temporal variation in the modified operational set point signal than in the operational set point signal.