Maximum power point tracking by means of parallel connection of power semigyrators

In this paper, the parallel connection of two power semigyrators of type G with controlled input current is used as an adaptation stage to improve the efficiency and reliability of a photovoltaic power conversion chain. A current sharing control has been incorporated in the system for guarantee the uniform distribution of the total peak power among the dc-dc converters. We use a democratic current sharing policy that also performs the impedance matching of the PV array. Simulation and experimental results show that the proposed system is suitable to perform the parallel connection of two power converters with gyrators characteristics preserving the Maximum Power Point Tracking of the PV array.