Minimising current stress and improving dynamic response for DAB converters using a hybrid MPC strategy with SPS and TPS

Abstract

In DC microgrid systems, DC-DC converters play a crucial role in power conversion and transmission. Among these topologies, the dual active bridge (DAB) converter is highly regarded for its bidirectional power transfer capability, galvanic isolation, and soft switching features, which significantly reduce power losses and enhance control flexibility. However, conventional proportional integral derivative (PID) control methods combined with phase shift modulation exhibit distinct limitations, including slow dynamic response times and high current stress on semiconductor components. To address these issues, this article proposes a hybrid model predictive control strategy aimed at simultaneously improving dynamic response speed and hardware efficiency. Furthermore, the system model and the proposed control algorithm are simulated across various operating modes of the converter to comprehensively evaluate and compare the performance outcomes using the MATLAB/Simulink environment.