Analysis and implementation of high step-up SEPIC converter without a coupled inductor for high voltage applications

In this paper, to convert the voltage of green energy sources and overcome their low output voltage problem, a high step-up interleaved sepic converter without a coupled-inductor is suggested. the converter introduces various advantages, which can aid in reducing the voltage stress on the converter switches and providing zero current switching conditions for all switches and diodes. also, the control system's operation is not complicated, and due to not using a coupled-inductor, the converter's input current ripple is low, increasing the solar cell's or fuel cell's lifetime. the analysis of the converter and design procedure are stated. the converter is simulated in the pspice software, and to prove the correctness of the analysis, a prototype of the converter has been made in the laboratory. the experimental results of the prototype confirm the theoretical analysis of the converter.