US 12,444,974 B1
System and method for creation and operation of a microgrid from a preexisting electric grid
Clinton A. Sadler, Blue, AZ (US)
Assigned to Pondera LLC, Blue, AZ (US)
Filed by Pondera LLC, Blue, AZ (US)
Filed on Apr. 10, 2024, as Appl. No. 18/631,881.
Int. Cl. H02J 13/00 (2006.01); G01R 21/00 (2006.01); H02J 3/00 (2006.01); H02J 3/18 (2006.01); H02J 3/24 (2006.01); H02J 3/38 (2006.01); H02J 3/44 (2006.01)
CPC H02J 13/00006 (2020.01) [G01R 21/003 (2013.01); H02J 3/0012 (2020.01); H02J 3/1842 (2013.01); H02J 3/241 (2020.01); H02J 3/388 (2020.01); H02J 3/44 (2013.01); H02J 13/00002 (2020.01); H02J 13/0004 (2020.01)] 16 Claims
OG exemplary drawing
 
1. A system for opening a microgrid for islanding from an existing grid, comprising: a remote terminal unit, wherein the remote terminal unit opens for the islanding from the existing grid, wherein the remote terminal unit is a unified power flow controller to control flow of power in the microgrid and the existing grid to independently control both active and reactive power flows in a transmission line between them, wherein the remote terminal unit is configured to: monitor voltage, current, and power level on the existing grid and the microgrid;
control isolation of the microgrid from the existing grid during power disturbances or outages;
manage power flow within the microgrid by monitoring voltages and currents at distributed generator sources within the microgrid; and
determine storage capacity of the microgrid; generate a response when a predetermined voltage deviation occurs to counteract voltage sag or surge.