Modified SEPIC Converter Design and Implementation with Grid-Connected PV System in Various Conditions

Abstract

Solar energy is becoming increasingly popular due to environmental concerns, government policies and its free availability. However, integrating solar energy into the utility grid presents a significant challenge for researchers due to various factors such as complex electrical equipment, DC/AC conversions, multiple voltage levels, complex grid codes, and the need for accurate modeling techniques. Additionally, improving the performance of solar energy is also important to keep up with other energy production resources. In this paper, a dynamic model of a PV system connected to the grid is presented, which includes a PV array, DC-DC boost converter, voltage source inverter (VSC), transformer, filter, and associated control circuitry. The study also involves the design and implementation of a Modified SEPIC Boost Converter for the system. Simulation results demonstrate improved efficiency and performance of the modified converter compared to the conventional DC-DC boost converter.