Discrete-Time Modeling of Dual Active Bridge Converter Benefiting Extended Phase Shift Modulation Based on Generalized Averaged Model

Abstract

In bidirectional power conversion applications, dual active bridge converters (DABCs) have been widely used. Benefiting conventional methods for modeling this type of converter always has many challenges and difficulties. This paper presents the discrete-time modeling of a DABC that benefits extended phase shift (EPS) modulation. The proposed discrete-time model is based on the generalized averaged model. The proposed model is ideal for implementing digital controllers due to the elimination of exponential terms. In addition, in this paper, the switched model of the converter is investigated to verify the proposed model.