US 11,949,352 B2
Method for controlling a generator of a wind turbine
Stefan Gertjegerdes, Aurich (DE); and Jair Cassoli, Aurich (DE)
Assigned to Wobben Properties GmbH, Aurich (DE)
Appl. No. 17/255,234
Filed by Wobben Properties GmbH, Aurich (DE)
PCT Filed Jun. 17, 2019, PCT No. PCT/EP2019/065902
§ 371(c)(1), (2) Date Dec. 22, 2020,
PCT Pub. No. WO2019/243265, PCT Pub. Date Dec. 26, 2019.
Claims priority of application No. 10 2018 115 114.4 (DE), filed on Jun. 22, 2018.
Prior Publication US 2021/0119563 A1, Apr. 22, 2021
Int. Cl. H02P 21/00 (2016.01); F03D 7/04 (2006.01); F03D 9/25 (2016.01); H02K 7/18 (2006.01); H02P 25/22 (2006.01)
CPC H02P 21/0003 (2013.01) [F03D 7/042 (2013.01); F03D 9/25 (2016.05); H02K 7/183 (2013.01); H02P 25/22 (2013.01); F05B 2220/7062 (2013.01); F05B 2270/326 (2013.01); F05B 2270/342 (2020.08)] 19 Claims
OG exemplary drawing
 
1. A method for controlling, using field-orientated closed-loop control, an active rectifier electrically connected to a stator of a generator of a wind turbine, the stator having a rotational axis about which the rotor is mounted, comprising:
determining a mechanical position of the rotor with respect to the stator;
predefining directed current (DC) components of rotor-fixed d- and q coordinates for at least one three-phase stator current;
determining an alternating current (AC) component for the q coordinate and/or the d coordinate at least based on the mechanical position of the rotor;
modulating and/or adding:
the determined AC component of the q coordinate to the predefined DC component of the q coordinate to obtain a q coordinate having DC and AC components, and/or
the determined AC component of the d coordinate to the predefined DC component of the d coordinate to obtain a d coordinate having DC and AC components, and
controlling the active rectifier at least based on the obtained q coordinate and/or the obtained d coordinate.