Grid Connected Power conveter

Examples are at least one renewable each connected at least one DC / DC converter to the energy source on the grid-connected power converter of the present invention; DC link unit to be a voltage value by the sum of the output currents from the at least one DC / DC converter is determined; And may include a drive to determine the current command value from the DC link to the negative voltage value and generates an AC voltage in accordance with said current command value. Thereby, while the respective DC / DC converter individually can be the maximum power follow-up before it is possible to maximize the modulation ratio of the drive it is possible to improve the efficiency. Also it is possible to maximize the modulation ratio reduces the total harmonic distortion, and it is possible to operate the drive over the modulation scheme can reduce harmonics and switching losses.