Transformerless Bidirectional DC-DC Converter for Battery Storage System with High Voltage Gain

摘要

Bidirectional DC-DC converters with wide voltage conversion ratio are essential in energy storage systems. In these systems (ESS), cost effective design is important factor, therefore, it needs to be designed with small numbers of component. This paper proposes a family of high voltage gain bidirectional converter based on the integration of Boost converter with Ćuk, SEPIC, BUCK-BOOST converters respectively. Detail comparisons are progressed in terms of operating mode, numbers of component, and efficiency. The experiment results are carried to verify the proposed converter family. The results show that converter I present the highest efficiency in boost mode (92%) and in buck mode (92.2%).