Interleaved Bidirectional Buck-Boost DC/DC Converter for High Voltage Battery Application

This paper presents an interleaved bidirectional buck-boost DC/DC converter (IBBBC) developed for charging and discharging high voltage battery energy storage system. The IBBBC is part of a hybrid photovoltaic-battery system and connects to the DC bus of a single-phase hybrid inverter. The adoption of an interleaved topology helps reduce current and voltage ripple, which can enhance converter’s performance and efficiency. This benefit reduces costs, as well as the size and weight of the converter. MATLAB/Simulink and Hardware-inthe-Loop (HiL) simulations were used to simulate the control performances of IBBBC in both on-grid and off-grid scenarios. In addition, the prototype of single-phase hybrid inverter with IBBBC was implemented in the laboratory. The experimental results revealed that the control responses of charge and discharge processes, during on-grid and off-grid operations, are similar to the simulation results.