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Design and Implementation of SEPIC Converter with MPPT P&O Algorithm Plus PI Control Using STM32F4VET6

As time goes on, fossil energy is increasingly being shifted to green energy, which is low in carbon emissions and environmentally friendly. One of the green energy is a solar cell or photovoltaic. Photovoltaic (PV) is green energy that has high efficiency because it does not have moving components. However, PV itself is not capable of producing stable power and depends on weather conditions. So, by combining this photovoltaic with a maximum power point tracker (MPPT) with the Perturb and Observe (P&O) algorithm which functions to maximize the power conversion results from the photovoltaic. This algorithm is used because it is simpler and easier and can extract large amounts of power. To adjust the output to be more flexible and as needed, the converter used is the SEPIC converter. SEPIC converter can increase or decrease the voltage so it is more flexible to use. The control system used is a close loop system equipped with PI control which is designed using a STM32F4VET6 microcontroller so that if there is a shift in value, the microcontroller will adjust and find the maximum value automatically. The load used is a 12V battery and proves that MPPT with P&O algorithm can increase the efficiency of PV.