A passivity-based control method for the single-phase three-level inverter

In this paper, a new control strategy based on the passivity-based control theory of Euler-Lagrange (EL) systems is proposed for a single-phase three-level inverter. The proposed regulators are based on an energy shaping and damping injection scheme. Since the passivity-based methodology is a nonlinear approach, excellent transient response and global stability can be assured under large perturbations in parameters and loads. Simulation and experimental results show that the proposed control method was correct and effective.