US 12,031,520 B2
Wind turbine with sea level wave characteristic determination
Eirik Nagel, Flensburg (DE); and John Nieuwenhuizen, Horsens (DK)
Assigned to Siemens Gamesa Renewable Energy A/S, Brande (DK)
Appl. No. 17/599,215
Filed by Siemens Gamesa Renewable Energy A/S, Brande (DK)
PCT Filed Mar. 13, 2020, PCT No. PCT/EP2020/056845
§ 371(c)(1), (2) Date Sep. 28, 2021,
PCT Pub. No. WO2020/200696, PCT Pub. Date Oct. 8, 2020.
Claims priority of application No. 19166600 (EP), filed on Apr. 1, 2019.
Prior Publication US 2022/0178350 A1, Jun. 9, 2022
Int. Cl. F03D 13/25 (2016.01); F03D 7/00 (2006.01); F03D 7/06 (2006.01); F03D 17/00 (2016.01); G01S 13/88 (2006.01); G01S 13/90 (2006.01); G01S 13/95 (2006.01); H01Q 1/34 (2006.01); H01Q 13/20 (2006.01); H04B 5/00 (2006.01); B63B 35/44 (2006.01)
CPC F03D 13/25 (2016.05) [F03D 17/00 (2016.05); G01S 13/9064 (2019.05); G01S 13/956 (2013.01); H01Q 1/34 (2013.01); H01Q 13/20 (2013.01); B63B 2035/446 (2013.01); F05B 2240/95 (2013.01); F05B 2270/30 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A wind turbine which is configured to be disposed in or above a sea floor, the wind turbine comprising:
a tower configured to protrude from a sea level and having a transmitter configured to transmit an electromagnetic wave to be reflected on the sea level and a receiver configured to receive the reflected electromagnetic wave, wherein at least one of the transmitter and the receiver includes a leaky feeder; and
a processing unit being in communication with the receiver and configured to analyse the reflected electromagnetic wave such that a wave characteristic of the sea level is determined,
wherein the processing unit is configured to use the Bragg's law 2d·cos θ=n·λ in determining the wave characteristic, wherein
d is a distance between two wave peaks of the sea level,
θ is a scattering angle of the reflected electromagnetic wave with respect to a horizontal (H),
λ is a wavelength of the electromagnetic wave, and
n is a positive integer.
 
7. A method of determining a wave characteristic of a sea level, the method comprising the following steps:
providing a tower of a wind turbine, which protrudes from a sea level, with a transmitter configured to transmit an electromagnetic wave to be reflected on the sea level and a receiver configured to receive the reflected electromagnetic wave, wherein at least one of the transmitter and the receiver comprises a leaky feeder;
analysing the reflected electromagnetic wave; and
determining a wave characteristic of the sea level based on the analysed, reflected electromagnetic wave,
wherein the wave characteristic is determined by use of the Bragg's law 2d·cos θ=n·λ in determining the wave characteristic, wherein
d is a distance between two wave peaks of the sea level,
θ is a scattering angle of the reflected electromagnetic wave with respect to a horizontal (H),
λ is a wavelength of the electromagnetic wave, and
n is a positive integer.