Maximum power point tracking for photovoltaic power based on the improved interleaved boost converter

As the core of controller of the maximum power point tracking (MPPT) for photovoltaic power, DC-DC converter influence the system's stability. An improved interleaved boost converter(IIBC) is proposed in this paper. Based on Matlab/Simulink model and simulation, an experimental comparison study has been investigated between the IIBC, the simple boost converter(SBC) and the traditional interleaved boost converter(TIBC). The IIBC could reduce the output voltage ripple, amplitude of variation and the voltage stress of the switches. The IIBC converter could select switches of low voltage and high level to reduce the loss of the circuit and is suitable in photovotaic power. Research and program MPPT algorithm by the incremental conductance method with variable step size based on the new converter.