“…At present, different topologies of converters are proposed to combine the energy sources [1]- [2]. Compared to the conventional dc-to-dc converters, the z-source converters have the advantages are Lower inrush current Lower harmonic injection, Larger range of output dc voltage improved reliability [3]-[5] The z-source converters satisfy the problems associated with conventional dc -to -dc converters. Therefore, a double input Z-source dc-to dc converter is considered to study the switching states at different mode of operation in open loop control, by adjusting the duty ratio output voltage can be controlled.…”