Design and Development of a New Transformerless Multi-port DC–DC Boost Converter

This paper proposes a new transformerless multi-port bidirectional DC–DC converter. The proposed converter has many advantages, including energy source hybridization, continuous input current, fewer components, and bi-directional capability. This proposed converter charging/discharging of the battery and power flow control can be accomplished by controlling all of the sources at the same time or separately. The proposed converter structure has four switching devices that are independently controlled by different duty ratios. The operation of the converter is divided into three modes, performance analysis of the converter in all the three operating modes is presented in detail for the continuous conduction mode. Stability analysis is carried out for the converter for all the three operation modes and design aspects are also clearly described. The performance of the converter is validated through simulation and experimental results. The Hardware In Loop (HIL) environment of the OPAL RT-5700 simulator is used to obtain the experimental results.