Gain Scheduling control with minimum-norm pole-placement design of a Dual-Active-Bridge dc-dc converter

The Dual-Active-Bridge bidirectional dc-dc converter (DAB) is used more and more in many applications of power electronics (energy, automotive, aerospace, etc.) due to its advantages with respect to other topologies. Many linear controls have been proposed in literature. Because of the intrinsic non-linearity of the DAB, the linear controls do not offer great performances when the state vector changes between different equilibrium points moving through the whole set of possible values. In this paper, after a formulation of the DAB model, a Gain Scheduling control with minimum-norm pole-placement is proposed and discussed. The results show that it can guarantee accurate control in a wide range of operating conditions, thus improving both the stability and dynamic response of the system with respect to the linear controls while not presenting the implementation complexity of non-linear controls.