US 12,410,770 B2
Method for controlling a multirotor wind turbine
Søren Dalsgaard, Hadsten (DK); Anders Yde Wollesen, Aarhus C (DK); Kim Hylling Sørensen, Aarhus C (DK); Julio Xavier Vianna Neto, Skødstrup (DK); and Jonathan Samson, Cheshire (GB)
Assigned to VESTAS WIND SYSTEMS A/S, Aarhus N (DK)
Appl. No. 17/911,109
Filed by VESTAS WIND SYSTEMS A/S, Aarhus N. (DK)
PCT Filed Mar. 8, 2021, PCT No. PCT/DK2021/050071
§ 371(c)(1), (2) Date Sep. 12, 2022,
PCT Pub. No. WO2021/180283, PCT Pub. Date Sep. 16, 2021.
Claims priority of application No. PA 2020 70159 (DK), filed on Mar. 10, 2020.
Prior Publication US 2023/0120533 A1, Apr. 20, 2023
Int. Cl. F03D 7/02 (2006.01); F03D 1/02 (2006.01)
CPC F03D 7/0204 (2013.01) [F03D 1/02 (2013.01)] 2 Claims
OG exemplary drawing
 
1. A multirotor wind turbine, comprising:
a tower;
two or more energy generating units, each energy generating unit comprising a rotor comprising one or more wind turbine blades;
at least one load carrying structure, the load carrying structure being connected to a tower via a yaw arrangement, the load carrying structure carrying the at least two energy generating units; and
a multirotor turbine controller configured to:
receive an input indicating a requirement to a change in operation of at least a first of the energy generating units, wherein the change in operation indicates that the first energy generating unit is to be shut down;
generate control commands for the first energy generating unit and for at least a second energy generating unit, the first energy generating unit and the second energy generating unit being mounted to the same load carrying structure, the control commands causing the required change in operation, and the control commands causing coordinated operation of at least the first energy generating unit and the second energy generating unit; and
control the energy generating units in accordance with the generated control commands so that the first energy generating unit as well as the second energy generating unit are shut down,
wherein the control commands are generated under the constraint that a yaw moment of the yaw arrangement is maintained below a predefined threshold level, and
wherein the predefined threshold level is selectable from one of a plurality of predefined threshold levels in dependence on at least one of: wind speed, wind direction, gust conditions, turbulence conditions, or an operational state of the energy generating units and/or the multirotor wind turbine.