Development of predictive current controller for multi-port DC/DC converter

Abstract

This paper investigates the utilization of a predictive current control for a four port DC/DC power electronic converter with an input port, two storage ports and a load port suitable for a Hybrid Electric Vehicle. Being a power converter with multiple ports, it has different operating modes. While the Stateflow controller is employed to handle mode selection, the predictive current controller is used to control the inductor current. The control laws governing each operating mode is derived out for valley current control. By making the inductor current in the upcoming switching cycle equivalent to the reference, the duty cycle is predicted. Simulation and experimental results show improvements in current ripple minimization, faster dynamic performance and comparable to traditional PI control method.