US 11,749,997 B2
Synchronization of electrical power grids
Vijay Bhavaraju, Arvada, CO (US); Souvik Chandra, Lakewood, CO (US); Abrez Mondal, Lakewood, CO (US); and Yi Yang, Arvada, CO (US)
Assigned to Eaton Intelligent Power Limited, Dublin (IE)
Filed by Eaton Intelligent Power Limited, Dublin (IE)
Filed on May 14, 2021, as Appl. No. 17/320,841.
Claims priority of provisional application 63/035,061, filed on Jun. 5, 2020.
Prior Publication US 2021/0384736 A1, Dec. 9, 2021
Int. Cl. H02J 3/42 (2006.01); G01R 19/25 (2006.01); H02J 3/44 (2006.01)
CPC H02J 3/42 (2013.01) [G01R 19/2513 (2013.01); H02J 3/44 (2013.01)] 38 Claims
OG exemplary drawing
 
1. A system comprising:
an interface configured to receive electrical data, the electrical data comprising:
an amplitude, frequency, and phase angle of at least one phase of an alternating current (AC) voltage at a first node in a first power grid, and
an amplitude, frequency, and phase angle of at least one phase of an AC voltage at a second node in a second power grid, wherein
the first power grid and the second power grid are configured to be operated independently of each other with the first node disconnected from the second node, or to be electrically connected to each other by electrically connecting the first node and the second node at a point of interconnection; and
the system further comprises a controller configured to:
access the electrical data;
determine an amplitude metric based on the amplitude of the AC voltage at the first node and the amplitude of the AC voltage at the second node;
determine a frequency metric based on the frequency of the AC voltage at the first node and the frequency of the AC voltage at the second node;
determine a phase angle metric by based on the phase angle of the AC voltage at the first node and the phase angle of the AC voltage at the second node;
compare the amplitude metric, frequency metric, and phase angle metric to respective amplitude, frequency, and phase angle thresholds; and
determine, based on the comparison, whether to control a first dispatchable energy source to adjust the amplitude and frequency of at least one phase of the AC voltage at the first node and whether to control a second
dispatchable energy source to adjust the phase angle of at least one phase of the AC voltage at the first node.