Improved Model-Based Phase-Shift Control for Fast Dynamic Response of Dual-Active-Bridge DC/DC Converters

摘要

Fast dynamic response of the output voltage is an essential requirement for dual-active-bridge (DAB) dc/dc converters under the operation of the voltage source. This article proposes an improved model-based phase-shift control (MPSC) strategy that combines model-based control with the design of feedback regulators and load current feedforward (LCFF) regulators. The improved MPSC strategy can ensure that the DAB has high-bandwidth control performance over the entire transmission power range without changing the controller parameters online. The design of controller parameters is simple and has the same model parameter as sensitive as MPSC. Its utility and effectiveness are verified by simulations and experiments.