US 12,230,965 B2
Power flow control system for a distribution grid having a grid forming capability
Haroon Inam, San Jose, CA (US)
Assigned to Smart Wires, Inc., Durham, NC (US)
Filed by Smart Wires Inc., Union City, CA (US)
Filed on Jul. 1, 2022, as Appl. No. 17/856,598.
Claims priority of provisional application 63/266,195, filed on Dec. 30, 2021.
Prior Publication US 2023/0216301 A1, Jul. 6, 2023
Int. Cl. H02J 3/18 (2006.01); H02J 3/32 (2006.01); H02J 3/38 (2006.01); H02M 1/42 (2007.01)
CPC H02J 3/1842 (2013.01) [H02J 3/32 (2013.01); H02J 3/381 (2013.01); H02M 1/4233 (2013.01); H02J 2300/22 (2020.01); H02J 2300/28 (2020.01)] 20 Claims
OG exemplary drawing
 
1. A system for controlling power delivery and power flow in a distribution grid having grid forming capability, the system comprising:
a connect-disconnect switch operable to connect a power transmission grid to and disconnect the power transmission grid from the distribution grid, the distribution grid having renewable energy generators and a plurality of loads;
a full bridge shunt inverter system connected to the distribution grid, the full bridge shunt inverter system comprising a four-quadrant DC-to-AC inverter and at least a battery for power storage and operable as a power source for grid formation; and
a pair of active filters connected in series on the distribution grid;
wherein the active filters are operable in at least four filter states; and
wherein the full bridge shunt inverter system is connected to the distribution grid at a node between the active filters to enable impedance adjustment for power flow control of the distribution grid.