Modelling of dual input DC/DC converter for hybrid energy system

Alternative energy sources like photovoltaic, fuel cell, wind, ultra capacitor, etc., are widely used in many applications such as in hybrid vehicles, micro grids etc. Combining two or more sources effectively, provides reliable power for the required application. Hence, the concept of hybrid energy system arises. In hybridization of energy systems, conventional sources and non-conventional sources are interfaced efficiently to drive the load. Two or more sources can be interfaced using different power electronic converters. Multiple Input DC/DC Converters (MIC) are one of the interfacing circuits used for hybridization of renewable and storage energy sources. In this paper, Dual input DC/DC converter is proposed which is useful in supplying the load from renewable and storage energy sources individually or simultaneously by connecting the two input sources in series. The two input sources to the converter used are photo-voltaic (PV) cell and a lead acid battery. Operation can be based on Buck, Boost or Buck-Boost modes. Using MATLAB/Simulink software, proposed converter is simulated.