US 12,404,835 B1
System and method for reducing drivetrain coupling torques after a grid event
Dustin F. Howard, Brookhaven, GA (US)
Assigned to GE Vernova Infrastructure Technology LLC, Greenville, SC (US)
Filed by GE Infrastructure Technology LLC, Greenville, SC (US)
Filed on Apr. 15, 2024, as Appl. No. 18/635,119.
Int. Cl. F03D 9/00 (2016.01); F03D 9/11 (2016.01); F03D 9/25 (2016.01); H02J 3/00 (2006.01); H02J 3/28 (2006.01)
CPC F03D 9/255 (2017.02) [F03D 9/11 (2016.05); H02J 3/001 (2020.01); H02J 3/28 (2013.01); F05B 2220/706 (2013.01); F05B 2270/1033 (2013.01); F05B 2270/337 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for controlling a power generating asset connected to an electrical grid, the power generating asset having a power converter and a drivetrain connected to a generator, the method comprising:
receiving, via a controller, a grid power limit associated with a grid event occurring in the electrical grid;
based on the grid power limit, determining a target grid power for the generator during recovery from the grid event;
during the recovery from the grid event, implementing, via the controller, a first power softening function, the first power softening function comprising:
receiving at least one of a torsional angle signal or change in speed signal associated with the drivetrain;
upon at least one of the torsional angle or change in speed crossing a threshold value, decreasing a power command on the generator below the target grid power to reduce the torsional angle at a later point in time;
determining a power difference between the target grid power and the decreased power command of the generator; and
supplying power from an energy storage device in communication with the converter to make up the power difference.