Hybrid Predictive Control for Tracking in a Single-Phase DC/AC Inverter with an Unknown Load

Abstract

This paper presents a control algorithm for the full H-bridge inverter that tracks with arbitrary small precision a given desired sinusoidal reference trajectory. The proposed control algorithm is hybrid and predictive in nature. It consists in steering a quadratic Lyapunov function of the tracking errors towards an arbitrarily small value. In this way, the trajectories of the inverter remain sufficiently close to the reference trajectory. This property is guaranteed in the presence of an unknown resistive load through the use of a finite-time estimator. Simulations confirm that the proposed algorithm maintains the frequency of the switches within a reasonable range.