Patent ID: 11901735
Assignee: GENERAL ELECTRIC RENOVABLES ESPANA, S.L.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  G  Y | IPC H

Claim 12:
13. A system for controlling a wind farm having a plurality of wind turbine generators connected to an electrical grid, the system comprising:
a controller configured to perform a plurality of operations, the plurality of operations comprising:
monitoring a reactive power command signal issued by a farm-level controller of the wind farm;
determining whether the reactive power command signal comprises oscillatory behavior characteristic of an instability by comparing a number of times the amplified magnitude crosses zero within the certain time period with a stability threshold and determining the one or more command signals issued by the farm-level controller comprises an oscillatory behavior characteristic of the instability when the number of times the amplified magnitude crosses zero within the certain time period exceeds the stability threshold; and
in response to determining that the reactive power command signal comprises oscillatory behavior characteristic of the instability, reducing one or more gains of a volt-var regulator of the farm-level controller to reduce the instability.