Research on bidirectional DC/DC converter based on three-phase interleaved parallel connection

As an interface device for photovoltaics, energy storage, loads, etc., the bidirectional DC/DC converter plays a crucial role in microgrid systems. The bidirectional DC/DC converter based on interleaved parallel technology can significantly reduce the output current ripple and current stress of each phase, which holds great engineering value for improving output power quality, reducing design costs, and enhancing circuit steady-state and dynamic performance. Based on this, this paper studies a three-phase interleaved parallel bidirectional DC/DC converter that combines both energy storage charging/discharging functions and photovoltaic Maximum Power Point Tracking (MPPT) capabilities. Its working principles and multi-operational mode control strategies are analyzed, along with simulation verification. Finally, experiments demonstrate the effectiveness and feasibility of the proposed control strategies.