Patent ID: 7339355

Claim:
An energy farm for interfacing with a utility grid, said energy farm made up of fluid-flow turbines, each fluid-flow turbine having a rotor, an output of said rotor being rotational power; a generator connected to said output of said rotor, an output of said generator being electrical power; an inverter connected to said output of said generator, at least a portion of said electrical power output being conditioned by said inverter resulting in an inverter output voltage and current at a frequency and phase angle appropriate for transmission to said utility grid; and a control system having a control system input and a control system output connected to said inverter, said energy farm further comprising: a collection system connected to said utility grid; a group of said fluid-flow turbines having inverter outputs connected to said collection system; and, a frequency and phase angle sensor connected to said utility grid operative during a fault on said grid; each said control system having said control system input connected to said sensor; each said control system output being a current command signal enabling each said inverter to put out a current waveform which is of the same phase and frequency as detected by said sensor.