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In this paper, a non-isolated high step-up dc-dc converter is presented. Theproposed converter is composed of an interleaved structure and diode-capacitormultiplier cells for interfacing low-voltage renewable energy sources tohigh-voltage distribution buses. The aforementioned topology can provide a veryhigh voltage gain due to employing the coupled inductors and thediode-capacitor cells. The coupled inductors are connected to thediode-capacitor multiplier cells to achieve the interleaved energy storage inthe output side. Furthermore, the proposed topology provides continuous inputcurrent with low voltage stress on the power devices. The reverse recoveryproblem of the diodes is reduced. This topology can be operated at a reducedduty cycle by adjusting the turn ratio of the coupled inductors. Moreover, theperformance comparison between the proposed topology and other converters areintroduced. The design considerations operation principle, steady-stateanalysis, simulation results, and experimental verifications are presented.Therefore, a 500-W hardware prototype with an input voltage of 30-V and anoutput voltage of 1000-V is built to verify the performance and the theoreticalanalysis.

A Non-Isolated High Step-Up Interleaved DC-DC Converter with Diode-Capacitor Multiplier Cells and Dual Coupled Inductors