Analysis of perturb & observe (P&O) algorithm for buck-boost converter

Mohammad Shahir, Muhammad Farhan (2021) Analysis of perturb & observe (P&O) algorithm for buck-boost converter. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Photovoltaic power systems are one of today's most rapidly growing technologies in renewable energy. DC-to-DC converters are commonly used for generating desired output in renewable energy applications. For instance, the photovoltaic power system supplies the DC-to-DC converter with energy, producing the desired voltage at the load. The buck-boost converter is selected in this project. The buck-boost converter also used in applications for power amplifiers and adaptive control applications. One of the photovoltaic power system flaws is the temperature and irradiance is always changing because of weather or surrounding condition. So, the Perturb an Observe method is implemented in this project to extract maximum power from the photovoltaic power system. Next, the photovoltaic power system produces too high or too less voltage for the load. The voltage from the photovoltaic power system must decrease or increase in order to meet the desired output. So the buck-boost converter is selected in this project. The aims of this project which are are to design buck-boost converter. Next, to investigate and compare the conventional buck-boost and non-inverting buck-boost converters. Then, simulating the buck-boost converter via the Simulink to analyze voltage, voltage ripple, current and current ripple. In this project, the conventional and non-inverting buck-boost converter were simulated in Simulink using the same value of inductor, capacitor and resistor. From the result, the non-inverting buck-boost converter has the best performance in aspect of voltage, voltage ripple, current and current ripple.

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