Comparative Analysis of Cuk, SEPIC, and Cuk-Sepic Fused Converters with Fuzzy MPPT Algorithm for Photovoltaic Systems

Abstract

To enhance the reliability and performance of photovoltaic (PV) systems, this paper offers an in-depth comparative analysis of Cuk, SEPIC, and a novel Cuk-SEPIC fused converter. This converter is integrated with a Fuzzy Logic Control (FLC)-based Maximum Power Point Tracking (MPPT) method for a solar system designed to support a DC load. Solar energy, a valuable renewable resource, necessitates effective power electronics for DC output adaption. Traditional Cuk and SEPIC converters provide unique voltage outputs: negative for Cuk and positive for SEPIC. The revolutionary Bipolar Cuk-SEPIC converter combines two designs and uses a single switch to create twin outputs with opposing polarities, considerably lowering input current ripple and increasing PV system efficiency. This bipolar DC connection provides reliable performance, making it appropriate for both AC and DC microgrids. Using FLC-based MPPT, the system dynamically changes converter duty cycles to optimum power under changing conditions. The system's performance is evaluated using MATLAB/SIMULINK .