Multilevel Boost Converter with Fractional Order PI-based MPPT Controller for Photovoltaic Applications

A multilevel boost converter (mlbc) with fractional order- proportional integral (fo-pi)-based perturb and observe (p&o) maximum power point tracking (mppt) controller is proposed to enhance the performance of photovoltaic (pv) systems. two control schemes for the mlbc were investigated: i) mlbc with fo-pi-based p&o mppt controller and ii) mlbc with only p&o mppt controller. the simulation results, carried out using matlab/simulink package, show that the performance of the mlbc with fo-pi-based p&o mppt controller much over weights that of the mlbc with only p&o mppt controller in terms of rise time, peak overshoot and settling time. these results indicate that the proposed system constitutes a good candidate for implementation in pv applications, in order to extract maximum electric power and to supply high output voltage to the load.