US 12,136,871 B2
Power supply system
Yanzhong Zhang, Shanghai (CN); and Xun Wang, Shanghai (CN)
Assigned to Huawei Digital Power Technologies Co., Ltd., Shenzhen (CN)
Filed by Huawei Digital Power Technologies Co., Ltd., Shenzhen (CN)
Filed on Jan. 6, 2023, as Appl. No. 18/150,999.
Application 18/150,999 is a continuation of application No. PCT/CN2020/100630, filed on Jul. 7, 2020.
Prior Publication US 2023/0163675 A1, May 25, 2023
Int. Cl. H02M 1/00 (2007.01); H02J 3/38 (2006.01); H02M 1/32 (2007.01); H02M 3/06 (2006.01); H02M 5/12 (2006.01); H02M 7/493 (2007.01)
CPC H02M 1/007 (2021.05) [H02J 3/381 (2013.01); H02M 1/32 (2013.01); H02M 3/06 (2013.01); H02M 5/12 (2013.01); H02M 7/493 (2013.01); H02J 2300/24 (2020.01)] 27 Claims
OG exemplary drawing
 
1. A power supply system, comprising:
three phase circuits connected to a grid through either a star or delta connection;
at least one first power supply; and
at least one energy combiner apparatus, wherein each phase circuit comprises
a plurality of direct current/alternating current (DC/AC) conversion combinations and
a filter unit, output terminals of the plurality of DC/AC conversion combinations are cascaded, a first cascaded terminal is coupled to an input terminal of the filter unit, a first output terminal of the filter unit is used as a first output terminal of the phase circuit, and a second cascaded terminal is used as a second output terminal of the phase circuit;
each DC/AC conversion combination comprises:
a first-stage isolation DC/AC conversion unit and
a second-stage isolation DC/AC conversion unit, output terminals of the first-stage isolation DC/AC conversion unit and the second-stage isolation DC/AC conversion unit are cascaded, the first cascaded terminal is used as a first output terminal of the DC/AC conversion combination, and the second cascaded terminal is used as a second output terminal of each DC/AC conversion combination;
a first input terminal of the first-stage isolation DC/AC conversion unit is used as a first input terminal of the DC/AC conversion combination,
a second input terminal of the first-stage isolation DC/AC conversion unit is coupled to a first input terminal of the second-stage isolation DC/AC conversion unit,
a coupling node is used as a second input terminal of the DC/AC conversion combination, and
a second input terminal of the second-stage isolation DC/AC conversion unit is used as a third input terminal of the DC/AC conversion combination; and
an input terminal of the energy combiner apparatus is coupled to an output terminal of the at least one first power supply, and
the three input terminals of the DC/AC conversion combination are coupled to three output terminals of the at least one energy combiner apparatus.