Enhancing Efficiency of High-Gain DC-DC Converters for Seamless Integration of Renewable Energy Sources Through Current Stress Reduction

Conventional high-gain DC-DC converters primarily focus on increasing voltage gain. However, instead of solely pursuing higher voltage gain, improving converter efficiency is crucial for applications such as solar PV and fuel cells. In this paper, we present an in-depth analysis of five novel high-gain DC-DC converters (HGDCs). These proposed architectures significantly reduce current stress on both passive and active components, particularly near the source side of the converters, resulting in improved efficiency. A comprehensive comparative study is conducted, comparing the proposed converters with recently reported converters. The analysis demonstrates that the reduced current stress leads to enhanced overall converter efficiency for HGDCs 2 and 4, surpassing both the other proposed converters and conventional converters. Experimental waveforms are provided for HGDCs 2 and 4, demonstrating their ability to boost 48 V to 650 V with a power output of 0.5 kW and a switching frequency of 50 kHz