US 12,328,008 B2
Method of supplying power to a wind farm in a low wind condition
Paul Brian Brogan, Glasgow (GB); Douglas Elliott, Glasgow (GB); Thyge Knueppel, Værløse (DK); and Andrew Roscoe, Glasgow (GB)
Assigned to SIEMENS GAMESA RENEWABLE ENERGY A/S, Brande (DK)
Appl. No. 18/287,326
Filed by Siemens Gamesa Renewable Energy A/S, Brande (DK)
PCT Filed Mar. 22, 2022, PCT No. PCT/EP2022/057491
§ 371(c)(1), (2) Date Oct. 18, 2023,
PCT Pub. No. WO2022/228784, PCT Pub. Date Nov. 3, 2022.
Claims priority of application No. 21170870 (EP), filed on Apr. 28, 2021.
Prior Publication US 2024/0195183 A1, Jun. 13, 2024
Int. Cl. H02J 3/46 (2006.01); H02J 3/38 (2006.01)
CPC H02J 3/472 (2020.01) [H02J 3/381 (2013.01); H02J 2300/28 (2020.01)] 12 Claims
OG exemplary drawing
 
1. A method of supplying power to a wind farm, the wind farm comprising a plurality of wind turbines which are connected in parallel to each other in a first string, wherein respective cable section circuit breakers are arranged between adjacent wind turbines of the first string; and a power generator which is connected to a first wind turbine of the first string, wherein a first string circuit breaker is arranged in a line between the power generator and the first wind turbine;
wherein the method comprises the following operation modes in a low wind condition, where a wind speed falls below a threshold value:
a first operation mode where the first string circuit breaker is closed to supply active power from the power generator to the first wind turbine and to supply or consume reactive power from or to the power generator to or from a passive cable and/or transformer between the power generator and the first wind turbine, while the remaining cable section circuit breakers in the first string are opened;
a second operation mode after the first operation mode, where a cable section circuit breaker between the first wind turbine and an adjacent second wind turbine is closed to supply active power from the power generator to the first and second wind turbines and to supply or consume reactive power from or to the first wind turbine to or from the passive cable and/or transformer between the first wind turbine and the second wind turbine, while the remaining cable section circuit breakers in the first string are opened.