A New Non-Isolated DC-DC Converter with High Voltage Gain Based on SEPIC Topology for Renewable Energy Applications

: A new SEPIC-based high step-up DC-DC converter is proposed in this paper. The proposed converter can work with high voltage gain in low duty cycle which causes to decrease the inductors current ripple, the conduction losses and the voltage stress across the semiconductors. Since the proposed converter is based on the SEPIC topology, it inherits the SEPIC’s advantage of continuous input current which can be significantly important in renewable energy systems. The voltage gain of the proposed converter is more than the classic SEPIC converter and its structure and control system are simplistic. In this paper, steady state analysis of the converter in CCM and DCM mode is provided. The experimental results show the suitable performance of the proposed converter.