A multiple-input current-source converter for a stand-alone hybrid power system

A multiple-input current-source converter for a stand-alone hybrid power system is proposed. As the power rating increases, isolated multiple-input converters may have limited efficiency caused by power losses from their coupled-inductor or transformer leakage inductance. This paper discusses a multiple-input circuit topology suitable for hybrid renewable energy applications, such as photovoltaic, wind generators, and fuel cells of up to a few kilowatts. The proposed converter has current source input interfaces and uses an auxiliary transformer to improve efficiency and reduce component count. The relationship between inputs and output is derived mathematically and verified with simulated and experimental results.