US 12,241,454 B2
Method for controlling reactive power exchange between a power grid and a wind power plant
Bo Yin, Ikast (DK); Torsten Lund, Fredericia (DK); Gert Karmisholt Andersen, Hovedgård (DK); Kouroush Nayebi, Ikast (DK); and Manoj Gupta, Jaipur (IN)
Assigned to VESTAS WIND SYSTEMS A/S, Aarhus N (DK)
Appl. No. 18/263,879
Filed by VESTAS WIND SYSTEMS A/S, Aarhus N (DK)
PCT Filed Jan. 20, 2022, PCT No. PCT/DK2022/050011
§ 371(c)(1), (2) Date Aug. 1, 2023,
PCT Pub. No. WO2022/167048, PCT Pub. Date Aug. 11, 2022.
Claims priority of application No. PA 2021 70052 (DK), filed on Feb. 4, 2021.
Prior Publication US 2024/0120740 A1, Apr. 11, 2024
Int. Cl. F03D 7/00 (2006.01); F03D 7/02 (2006.01); H02J 3/18 (2006.01)
CPC F03D 7/0284 (2013.01) [H02J 3/1878 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method for controlling reactive power exchange between a power grid and a wind power plant comprising (i) a plurality of wind turbine generators each having a corresponding power converter with a converter controller, (ii) a power plant controller generating reactive component setpoints for the wind turbine generators, and (iii) a transformer with an on load tap changer coupled between the wind power plant and the power grid, wherein the method comprises:
determining a need for reactive power exchange between the wind power plant and the power grid;
adjusting a configuration of the on load tap changer in the transformer to provide a requested reactive power;
generating by the power plant controller reactive component setpoints for the wind turbine generators, wherein the reactive component setpoints comprise a steady state part and a short-term part, wherein the steady state part does not exceed steady state capabilities of the power converters of the wind turbine generators, and wherein the short-term part exceeds the steady state capabilities of the power converters of the wind turbine generators; and
operating the wind turbine generators in accordance (i) with the short-term part of the reactive component setpoints to overload the power converters of the wind turbine generators when the transformer is being adjusted to provide the requested reactive power and (ii) with the steady state part of the reactive component setpoints after the transformer has been adjusted to provide the requested reactive power.