Abstract
A DC-DC converter plays a crucial role in a photovoltaic (PV) system. Power generated by the PV system is a function of solar irradiance and temperature. Power voltage (P-V) characteristic of a PV module exhibits a single power peak at uniform irradiance and temperature. To operate the PV array at its maximum power point, a maximum power (MP) point (MPP) tracking (MPPT) algorithm is required. The DC-DC converter placed in between the PV array and load, works as an impedance matching circuit. Depending on the application, a suitable selection of DC-DC converter is an important decision. In this study, a comparative simulation analysis of different buck-boost derived non-isolated DC-DC converters are discussed in terms of power conversion efficiency, output power ripple, and tracking speed. The converters studied are buck-boost, Cuk, single-ended primary-inductor converter (SEPIC), Zeta. To evaluate the performance of each DC-DC converter, a widely used Perturb and Observe (PO) MPPT algorithm is modeled and simulated in MATLAB Simulink.
Published Version
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