Maximum power tracking in parallel connected converters

A control scheme for parallel connected converter systems that will transfer the maximum available power from a nonideal voltage source is presented. Monitoring the rates of change in both the average input current and average input power from the source in each switching period, the proposed control method can dynamically regulate the DC-DC converter system to track the peak power of the source. The amplitude and frequency of the oscillation due to a limit-cycle around the system peak power point is analyzed. In addition, the central-limit current distribution control for the system is incorporated in this control scheme to improve the system efficiency and reliability by uniformly distributing the total peak power among the converters connected in parallel.<
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