Improved Voltage Boost Converter Utilising SEPIC Configuration for Renewable Energy Implementation

Abstract

This paper introduces a novel high-step-up DC-DC Converter that utilizes the Single-Ended Primary Inductor Converter (SEPIC) configuration, representing a significant advancement in the realm of power electronics. The proposed converter aims to achieve notably higher voltage output compared to conventional converters, thereby enhancing overall power conversion efficiency and reducing component stress. This idea introduces two high static gain step-up DC-DC converters derived from a customized version of the SEPIC converter. These proposed configurations are especially advantageous for applications necessitating efficient conversion from low input voltage to high output voltage, due to their optimized switch voltage and superior overall efficiency. The paper comprehensively examines and presents both magnetic coupling and non-magnetic coupling configurations. The increase in static gain is facilitated by the magnetic coupling, which helps keep the switch voltage low. Theoretical evaluations and experimental results demonstrate the suitability of both designs for applications demanding high static gain, particularly in renewable energy and low DC output voltage power sources.