DC/DC Converter With High Current Capability for All DC Renewable System

High current, efficiency, and compactness are the key challenges of dc/dc converters for all dc renewable system. In this letter, a dc/dc converters is proposed to address these challenges. The proposed converter incorporates three key innovations: parallel operation, direct transmission of partial power, and non-ac energy balancing. Through parallel operation, the converter facilitates the sharing of current across multiple strings of submodules, resulting in high current capability. Furthermore, the integration of direct transmission of partial power and non-ac energy balancing minimize installations of insulated gate bipolar transistors (IGBTs) and capacitors, contributes to enhanced efficiency and compactness. The effectiveness and validity of the proposed converter are demonstrated through simulation and experimental results.