MPC based Controller Design of Battery Integrated Modular Multilevel Converter

The control performance of converter directly affects the drive efficiency of electric vehicle (EV). This paper studies on the model predictive control (MPC) based controller design of battery integrated modular multilevel converter (B-MMC). Aiming at the goal of three-phase current tracking and battery balancing control of B-MMC, three-layer controllers are designed. The first controller is the finite control set model predictive control (FCS-MPC), which realizes the motor drive by tracking the phase current. The second controller is the circulation controller for the active balance control of battery. It is composed of multiple proportional controllers to realize the battery balance between the bridge arms. The third controller is the battery sorting algorithm to achieve the passive balance control of the battery in the same bridge arm. At the same time, field programmable gate array (FPGA) is used to accelerate the controller to meet the real-time requirements of B-MMC. Finally, the simulation results of the B-MMC control system validates the effectiveness of the control algorithm.