US 12,355,256 B2
Controllable grid interface for microgrids
Behnam Tamimi, Waterloo (CA); and Claudio Cañizares, Milton (CA)
Appl. No. 18/547,427
Filed by Behnam Tamimi, Waterloo (CA); and Claudio Cañizares, Milton (CA)
PCT Filed Feb. 25, 2022, PCT No. PCT/IB2022/051698
§ 371(c)(1), (2) Date Aug. 22, 2023,
PCT Pub. No. WO2022/180603, PCT Pub. Date Sep. 1, 2022.
Claims priority of provisional application 63/207,363, filed on Feb. 25, 2021.
Prior Publication US 2024/0136823 A1, Apr. 25, 2024
Int. Cl. H02M 7/757 (2006.01); H02J 3/36 (2006.01); H02J 3/38 (2006.01); H02J 3/46 (2006.01)
CPC H02J 3/381 (2013.01) [H02J 3/36 (2013.01); H02J 3/46 (2013.01); H02M 7/7575 (2013.01); H02J 2300/20 (2020.01)] 12 Claims
OG exemplary drawing
 
1. A microgrid connector controller for coupling a first terminal of a first AC power grid to a second terminal of a second AC power grid, comprising:
a first bidirectional AC/DC converter coupled to a DC link and having a first AC line;
a second bidirectional AC/DC converter coupled to the DC link, having a second AC line coupled in series with the first AC line, and configured to regulate frequency of AC voltage of the second AC line to a predetermined frequency;
an AC link configured to transfer active power from the first power grid to the second power grid including
the first and second AC lines coupled in series with the second terminal, and
a current divider coupled to the first terminal, the first AC line and the second AC line, for setting a current of the second bidirectional AC/DC converter to be larger than a current of the first bidirectional AC/DC converter.