  In this paper, a non-isolated high step-up DC-DC converter has been proposed
for renewable energy applications. The proposed structure converter has been
derived from the fundamental Zeta converter, in both of which only a single
switch is employed. The voltage gain ratio has considerably enhanced in this
converter with the absence of using switched capacity. To magnify voltage gain
of the converter, a coupled-inductor has adopted. Increase and decrease of gain
by changing the ratio of coupled-inductor assist the duty cycle. The number of
components is low in this structure. The operating principle and evaluation of
the proposed converter, considering designing approaches for elements, are
discussed in detail. To verify the feasibility of the proposed converter,
simulation results have been provided and evaluated.
