Multiple Active Bridge Converter Controlled by a Feed-Forward Compensator

Multiple active bridge (MAB) converters have gained relevance in applications such as photovoltaic systems, microgrids, aircraft, solid-state transformers, and electric vehicles. One of the challenges for the MAB is the existing coupling between its different ports since the operating point of each port depends on the parameters of the others; therefore, the dynamic response depends on all ports. This article proposes a feed-forward compensation for the MAB converter, which allows for achieving a good dynamic response under load and power supply changes, reducing the coupling issue; additionally, the proposal is not complex compared to other schemes, this work considers a piecewise model instead of the trigonometric model; and for the uncoupling process no linearization is performed, therefore, the operation is secure for different operating conditions. The proposal is described, analyzed, and experimentally tested in a 200 W triple active bridge prototype.