US 11,791,634 B2
Grid-tie system for AC generators
Ian D. Brownstein, Seattle, WA (US); Benjamin W. Strom, Seattle, WA (US); and Jason A. Mavis, Seattle, WA (US)
Assigned to XFlow Energy Company, Seattle, WA (US)
Filed by XFlow Energy Company, Seattle, WA (US)
Filed on May 3, 2022, as Appl. No. 17/735,499.
Claims priority of provisional application 63/183,842, filed on May 4, 2021.
Prior Publication US 2022/0360087 A1, Nov. 10, 2022
Int. Cl. H02J 3/38 (2006.01); H02J 3/32 (2006.01); H02M 7/48 (2007.01)
CPC H02J 3/381 (2013.01) [H02J 3/32 (2013.01); H02M 7/4807 (2013.01); H02J 2300/24 (2020.01); H02J 2300/28 (2020.01)] 33 Claims
OG exemplary drawing
 
1. A system comprising:
a back end system coupled to an isolated direct-current (DC) power source and a generator powered by a renewable energy source and comprising first circuitry configured to convert first alternating-current (AC) power from the generator to DC power and to provide the DC power to a DC power bus, the first circuitry further configured to initiate operation using power from the isolated DC power source; and
a front end system comprising an inverter coupled to an isolated DC power source generator, the inverter including a ground isolation monitor interrupter (IMI) circuit coupled to the DC power bus and configured to receive the DC power and convert the DC power to second AC power for provision to a power grid, wherein the isolated power source generator is configured to ground-isolate third AC power of the power grid for conversion to DC power for the isolated DC power source.