US 11,894,681 B2
System and method for power oscillation damping in a power generating system
Bishnu Sapkota, Niskayuna, NY (US); Alfredo Sebastian Achilles, Niskayuna, NY (US); and Il-Do Yoo, Andover, MA (US)
Assigned to General Electric Company, Schenectady, NY (US)
Filed by General Electric Company, Schenectady, NY (US)
Filed on Oct. 1, 2021, as Appl. No. 17/492,048.
Prior Publication US 2023/0104828 A1, Apr. 6, 2023
Int. Cl. H02J 3/24 (2006.01); G05B 19/042 (2006.01); H02J 3/38 (2006.01)
CPC H02J 3/24 (2013.01) [G05B 19/042 (2013.01); H02J 3/381 (2013.01); G05B 2219/2619 (2013.01); H02J 2300/28 (2020.01)] 22 Claims
OG exemplary drawing
 
1. A method for damping power system oscillations in a power system network having one or more local inverter-based generators within a plant, the plant connected to a grid at a point of intersection (POI), the method comprising:
at a plant-level controller, receiving one or more grid signals having a characteristic indicative of a power system oscillation;
at the plant-level controller, generating an auxiliary signal from the grid signals;
transmitting the auxiliary signal to a local controller of one or more of the inverter-based generators;
receiving a reactive power command signal at the local controller that is separate from the auxiliary signal and indicates a desired reactive power output from the inverter-based generators;
at the local controller, using the auxiliary signal to modulate the reactive power output from the inverter-based generators from that indicated by the reactive power command signal to improve damping of the power system oscillations.