US 12,237,688 B2
Integrating energy storage units in converters for use in PV-based inverters
Majid Pahlevaninezhad, Kingston (CA); and Praveen Jain, Kingston (CA)
Assigned to Sparq Systems Inc., Kingston (CA)
Filed by SPARQ SYSTEMS INC., Kingston (CA)
Filed on Nov. 24, 2022, as Appl. No. 17/993,940.
Prior Publication US 2024/0178670 A1, May 30, 2024
Int. Cl. H02J 3/38 (2006.01); G05F 1/67 (2006.01); H02J 7/35 (2006.01); H02M 3/335 (2006.01)
CPC H02J 3/381 (2013.01) [G05F 1/67 (2013.01); H02J 7/35 (2013.01); H02M 3/33571 (2021.05); H02M 3/33573 (2021.05); H02J 2300/26 (2020.01)] 28 Claims
OG exemplary drawing
 
1. A microinverter system for receiving input DC power and for producing AC power suitable for an AC power grid, the system comprising:
a plurality of multi-level current driven DC/DC converters, each of said plurality of DC/DC converters receiving said input DC power from DC power sources, at least one of said plurality of DC/DC converters comprising an integrated energy storage subsystem;
a DC/AC inverter receiving outputs of said plurality of DC/DC converters and producing said AC power, an output of said DC/AC inverter being received by said AC power grid;
a differential geometric control system for controlling said DC/AC inverter and for controlling said plurality of DC/DC converters;
wherein said control system controls each of said plurality of DC/DC converters to perform maximum power point tracking to extract maximum input DC power from said DC power sources.