Comparison of the performance of MPPT methods applied in Buck and Buck-Boost converters for autonomous photovoltaic systems
Keywords:
Buck, Buck-Boost, Constant voltage, Perturb and observe, Incremental conductance, PV stand-alone systemAbstract
In photovoltaic (PV) generation systems, the energy produced is limited by the low efficiency of solar panels, weather variability, and the characteristics of the connected load. The use of maximum power point tracking (MPPT) methods is essential to maximize the power supplied. This paper presents a comparative study of the performance of three MPPT techniques: constant voltage (CV), perturb and observe (P&O), and incremental conductance (IncCond), applied in two different DC-DC power converter topologies: Buck and Buck-Boost. Each combination is analyzed in terms of its transient response and steady-state efficiency, with simulations carried out in Matlab/Simulink. Results show that the CV/Buck-Boost combination had the best transient behavior, while the IncCond/Buck combination achieved the highest steady-state efficiency.
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