Optimal control of a two control input buck-boost converter

Abstract

The converter system under consideration is a two-input one-output non-inverting buck-boost converter. The two control inputs introduce a degree of freedom that may be used to optimize dynamic performance and other objectives such as energy efficiency at steady state. Dynamic performance during transient is achieved using an MPC scheme, which drives the system at steady state toward its energy efficiency optimum using a precomputed target reference. The problem is complicated as state and input are combined bilinearly. Different control models and MPC problem formulations are considered to tackle the problem and performance is compared in simulations.