US 12,132,321 B2
Control of a DFIG grid side converter
Ibrahim Alisar, Izmir (AR); Erhan Demirok, Izmir (AR); José Luis Rodriguez Izal, Burlada (ES); Estanislao Pablo Tomey Lopez, Navarra (ES); Iosu Aizpuru Larranaga, Guipuzkoa (ES); Antxon Arrizabalaga Etxezarreta, Gipuzkoa (ES); Aitor Idarreta Garate, Guipuzkoa (ES); Unai Iraola Iriondo, Guipuzkoa (ES); and Mikel Mazuela Larranaga, Gipuzkoa (ES)
Assigned to Siemens Gamesa Renewable Energy Innovation & Technology S.L., Sarriguren (ES)
Appl. No. 18/034,759
Filed by Siemens Gamesa Renewable Energy Innovation & Technology S.L., Sarriguren (ES)
PCT Filed Nov. 2, 2021, PCT No. PCT/EP2021/080321
§ 371(c)(1), (2) Date May 1, 2023,
PCT Pub. No. WO2022/096427, PCT Pub. Date May 12, 2022.
Claims priority of application No. 20382955 (EP), filed on Nov. 4, 2020.
Prior Publication US 2023/0420951 A1, Dec. 28, 2023
Int. Cl. H02J 3/38 (2006.01); F03D 9/25 (2016.01); H02J 3/18 (2006.01); H02J 3/46 (2006.01)
CPC H02J 3/381 (2013.01) [F03D 9/255 (2017.02); H02J 3/1885 (2013.01); H02J 3/46 (2013.01); H02J 2300/28 (2020.01)] 14 Claims
OG exemplary drawing
 
1. A method for controlling a reactive power exchange of a Doubly-Fed Induction Generator (DFIG) wind facility with a grid, the DFIG wind facility comprising a utility grid connected grid side converter connected via a DC link and a rotor side converter to a rotor of a DFIG, the method comprising:
determining a grid side converter reactive power thermal limit value;
determining a value of a required DFIG magnetizing reactive power to be consumed by a stator;
setting dynamically a sharing of a reactive power between the stator and the grid side converter such that the grid side converter reactive power value is a difference between a reactive power demand of the DFIG wind facility and the magnetizing reactive power consumed by the stator;
operating the DFIG wind turbine facility such that an absolute value of grid side converter reactive power is adjusted to be below the grid side converter reactive power thermal limit value value;
in case a total DFIG reactive power demand is greater than zero:
controlling the grid side converter to supply reactive power to serve the total DFIG reactive power demand total-according to a maximum possible degree so that the grid side converter operates within a thermal limit, so that a thermal limit of the grid side converter is not exceeded.