A Novel High-Gain Cuk-Sepic Converter with Coupled Inductor for Renewable Energy Applications

The increase in photovoltaics, fuel cells, and power cells as a proportion of our energy structure can reduce dependence on traditional energy sources, which can result in energy conservation, emission reduction, and sustainable development. Power grid development has increasingly focused on integrating distributed energy and power grids. It proposes a technology for integrating the Sepic-converter and Cuk-converter. A primary winding is created from the Sepic's intermediate energy storage inductor. A capacitor is added to the secondary winding to generate a voltage-doubling structure. Performance and efficiency are improved with this method. It maintains the continuous input and output current characteristics of the Cuk converter, making it compatible with DC buses and photovoltaic arrays. It is the passive clamping capacitor that absorbs the leakage inductor energy. The parasitic capacitance and switch are thereby reduced, and the switch is also subject to low voltage stress. This paper explores the working principle, performance parameters, and operating conditions of the converter in detail. Finally, an experimental platform was used to produce a 150W prototype. Experimental results were used to test and verify the validity of the previous theoretical analysis.