Patent ID: 8618694

Claim:
A system for dampening first oscillations of a first frequency in electrical power on a power grid and second oscillations of a second frequency different than the first frequency in the electrical power on the power grid, the system comprising: a wind park including a first wind turbine and a second wind turbine, each of the first and second wind turbines including a rotor, a generator operatively coupled with the rotor for generating electrical power, and an inverter coupling the generator with the power grid to output the electrical power to the power grid; a sensor configured to provide oscillation data associated with the power grid; and a controller coupled with the inverter of the first wind turbine and with the inverter of the second wind turbine, the controller configured to generate first and second control signals based on a small-signal stability control algorithm, the algorithm being capable of resolving, from the oscillation data, a first frequency component of the electrical power on the power grid that is used to generate the first control signal and a second frequency component of the electrical power on the power grid that is used to generate the second control signal, the controller configured to provide the first control signal to the inverter of the first wind turbine so that the inverter of the first wind turbine is operated to modulate the electrical power output by the first wind turbine to dampen the first oscillations, and the controller configured to provide the second control signal to the inverter of the second wind turbine so that the inverter of the second wind turbine is operated to modulate the electrical power output by the second wind turbine to dampen the second oscillations during a time period that at least partially overlaps with a time period during which the first wind turbine dampens the first oscillations.