Finite Control Set–Model Predictive Power Management of Multi Active Bridge Converter

Multi active bridge (MAB) converters have been increasingly used due to high-power density and flexible power sharing. However, the power cross-coupling effect among different MAB ports poses a great challenge for energy control. Traditional proportional–integral controllers used for voltage control and power sharing in MAB converters exhibit relatively slow dynamic responses and significant overshoot. To address this problem, a multicost function finite control set–model predictive control (FCS-MPC) strategy is proposed, which eliminates the need for power decoupling. This control strategy can achieve excellent transient performance and precise power sharing performance. This article develops FCS-MPC and implements the proposed method through a triple active bridge converter example. The operating principle involves predicting dc voltage and current through an FCS of phase-shift ratios, where voltage and power converge iteratively using dual cost functions under single-phase shift modulation. The feasibility of the proposed method is validated by simulation and experimental results.