US 12,261,479 B2
Arrangement of converters and fast switches to provide BESS and UPS combined function
Eric Lucien Brun, Sassenage (FR)
Assigned to SCHNEIDER ELECTRIC IT CORPORATION, Foxboro, MA (US)
Filed by SCHNEIDER ELECTRIC IT CORPORATION, Foxboro, MA (US)
Filed on Feb. 22, 2024, as Appl. No. 18/584,014.
Application 18/584,014 is a continuation of application No. 17/656,951, filed on Mar. 29, 2022, granted, now 11,942,818.
Prior Publication US 2024/0195214 A1, Jun. 13, 2024
Int. Cl. H02J 9/06 (2006.01)
CPC H02J 9/062 (2013.01) [H02J 9/068 (2020.01)] 19 Claims
OG exemplary drawing
 
1. An uninterruptible power supply (UPS) system comprising:
at least one energy-storage-device connection configured to be coupled to an energy-storage device;
a first output connection configured to be coupled to a main power source providing main power;
a second output connection configured to be coupled to at least one load;
a first power converter coupled to the at least one energy-storage-device connection;
a second power converter coupled to the at least one energy-storage-device connection;
a first switch coupled to the first power converter;
a second switch coupled to the first switch and the second power converter; and
at least one controller coupled to the first power converter and the second power converter, the at least one controller being configured to
control the first switch to connect the first power converter to the first output connection,
control the second switch to connect the second power converter to the first switch and the first power converter to the second output connection;
control the first power converter to provide power to the first output connection via the first switch,
control the second power converter to provide power to the first output connection via the first switch and the second switch in parallel with the first power converter providing power to the first output connection,
control the second switch to disconnect the first power converter from the second output connection responsive to detecting a fault in the main power,
control, responsive to detecting the fault in the main power, the first power converter to provide power to the first output connection during an interim period starting responsive to detecting the fault in the main power,
control, responsive to detecting the fault in the main power, the second switch to disconnect the second power converter from the first output connection,
determine whether the fault in the main power has ended within the interim period, and
control, responsive to determining that the fault in the main power has not ended within the interim period, the first power converter to provide power to the second output connection in parallel with the second power converter.