Bidirectional Resonant Power Converter for Hybrid Energy Systems

Abstract

A bidirectional series DC-DC power converter with two resonant tank components is presented. A survey of a two-bridge inverter laboratory model of the device operating above resonant frequency is realized. A control technique with frequency variation at a defined range is used and by which a control characteristics linearization is achieved and the efficiency of the device is improved. The behavior of the relevant converter operating at different frequency ratios is demonstrated, and the dependencies of the current through the resonant components and the output voltage are obtained. The possibility of the converter to transfer the energy in both forward and reverse directions at different input and output loads is demonstrated, which proves the applicability of the device in the area of hybrid energy systems.

Keywords

• soft commutation
• bidirectional energy transfer
• hybrid energy systems