High-gain DC-DC converter with advanced techniques: a review

This article provides an in-depth examination of recent advances in high-gain 
DC-DC converters, emphasizing soft-switching techniques and topological 
innovations that minimize voltage stress for renewable energy applications. 
High-gain DC-DC converters are crucial in photovoltaic and fuel-cell 
systems, where boosting low input voltages to higher levels must be achieved 
with high efficiency and compact design. Traditional boost converters fall 
short due to elevated switching stress, discontinuous input currents, and lower 
efficiency at high-gain levels. To address these limitations, this review 
categorizes and critically evaluates state-of-the-art converter topologies 
developed for high-gain operation. The main contributions of this review are 
as follows: i) A systematic classification of high-gain converter 
configurations with emphasis on their operational principles; ii) A detailed 
evaluation of soft-switching techniques, including zero voltage switching 
(ZVS) and zero current switching (ZCS), focusing on their roles in reducing 
switching losses and electromagnetic interference; iii) An analytical 
discussion on voltage stress mitigation methods and improved control 
strategies; and iv) An assessment of emerging trends in integrating advanced 
power electronics with renewable energy systems. These contributions 
collectively provide a comprehensive reference for researchers and engineers, 
supporting the development of next-generation high-performance DC-DC 
converters tailored for sustainable energy applications.