Patent ID: 8213199

Claim:
A power conversion system for converting dc power from a plurality of unstable dc sources to ac power for injection into an electric power grid, the system comprising: at least one wind-generated power collection node comprising a turbine driven ac generator having a rectified dc output; a plurality of regulated current source inverters, each one of the plurality of regulated current source inverters having a plurality of switching devices for producing a multiple phase ac output, the rectified dc output of the at least one wind-generated power collection node supplying input power to each one of the plurality of regulated current source inverters, the multiple phase ac output from each one of the plurality of regulated current source inverters operating synchronously with the voltages of the electric power grid, the commutation of the plurality of switching devices in each one of the plurality of regulated current source inverters sequenced to produce a multiple phase ac output currents from each one of the plurality of regulated current source inverters; and at least one transformer for phase shifting the multiple phase ac output currents from all of the plurality of regulated current source inverters for producing a supply of three-phase currents for injection into the electric power grid, each of the three-phase currents having a multiple stepped waveform, whereby increasing the number of the plurality of regulated current source inverters increases the number of multiple steps in the multiple stepped waveform of each of the three-phase currents and decreases the total harmonic distortion of the three-phase currents.