Abstract:

This paper presents the modeling and analysis of DC-DC converters using MATLAB/Simulink from an undergraduate engineering perspective. The project focuses on three common converter topologies: Boost, Buck-Boost, and SEPIC. These converters are widely used in renewable energy systems to manage and regulate voltage between power sources, such as solar panels, and electronic loads. Each converter was built and assessed in Simulink to study how it behaves under different input and load conditions. The simulation helped students understand important concepts such as voltage regulation, ripple, and how the duty cycle affects performance. This direct experience made it easier to connect theory with practical applications. Among the three topologies, the SEPIC converter showed the most flexibility. It was able to step voltage up or down while keeping the output polarity the same, which makes it a viable choice for renewable systems where the input voltage can vary. The Boost and Buck-Boost converters also worked well, but each had limitations depending on the situation. Overall, the project helped students learn how different converters work and how to model them using MATLAB/Simulink. It also showed how important converter choice is when designing efficient and stable renewable energy systems. The experience provided valuable insight into real-world engineering challenges while reinforcing classroom knowledge through simulation.

Keywords:

DC-DC Converter, Boost Converter, Buck-Boost Converter, SEPIC Converter, PV, Simulation, MATLAB/Simulink, Education.