Feedback Linearization Control of a Dual Active Bridge Converter Feeding a Constant Power Load

FEDERICO RODRIGUEZ; DANIEL O. GARRIDO; RUBÉN O. NÚÑEZ; GERMÁN G. OGGIER; GUILLERMO O. GARCÍA

REVISTA IBEROAMERICANA DE AUTOMATICA E INFORMATICA INDUSTRIAL

COMITE ESPANOL AUTOMATICA CEA

Lugar: Valencia; Año: 2023

1697-7912

This paper presents a control strategy based on the feedback linearization technique to regulate the voltage at the terminals of a constant power load fed by a Dual Active Bridge (DAB) Converter. A nonlinear change of coordinates corresponding to the sum of the energies in the capacitors is used to avoid internal dynamics that could destabilize the system. Simulation and experimental results are presented to validate the proposed control strategy. A good dynamic and steady-state response can be verified under significant variations in the transferred power. Furthermore, the stability of the control for different initial conditions of the voltages in the converter ports is studied using a phase plane analysis. These results confirm that for a given power to be transferred, there is a minimum initial voltage on the load above which the system is stable.