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