Multi-input boost converter for parallel connected renewable energy systems

Abstract

This paper proposes a multi-input boost converter for parallel connected renewable energy systems. The proposed converter simultaneously harnesses power from two parallel connected renewable energy sources while maintaining constant output voltage. The operation of the converter is examined and its operating modes are developed. The small-signal ac model of the proposed converter is developed in continuous conduction mode by circuit averaging technique. Based on the developed small-signal ac model, line-to-output and control-tooutput transfer functions are derived and the relevant Bode plots are obtained analytically and are verified by circuit simulation for evaluating open-loop and closed-loop stability of the converter. The analytical results are in good agreement with the computer results, validating the developed small-signal ac model and the derived transfer functions.