Characterization of photovoltaic array for MPPT and boost converter
DOI:
https://doi.org/10.15649/2346030X.6274Keywords:
boost converter, control system, efficiency, irradiance, MPPT, P&O, photovoltaic, power electronics, PWM, raspberry pi, renewable energy, system modellingAbstract
This study presents the development and validation of a Boost-type DC-DC converter designed to optimise energy transfer between a 340W Amerisolar photovoltaic array and a programmable load. The methodology integrates panel characterisation using the two exponential diode model (IEC 60891 standard) and the use of the MATLAB Simscape toolbox for precise controller design. The core of the system uses a Raspberry Pi 5 programmed in Python to execute MPPT algorithms, contrasting the performance of the classic Perturbation and Observation (P&O) method with a modified step version. The experimental results demonstrate that the modified algorithm, by incorporating an additional counting parameter, significantly improves convergence to the Global Maximum Power Point (GMPP) under fluctuating weather conditions. Finally, the prototype validated a dynamic efficiency of 90% operating at a switching frequency of 100 kHz, confirming the robustness of embedded systems in mitigating instabilities caused by irradiance transients.
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