Adaptive Delay-Tolerant Robust Predictive Current Control

Abstract

This paper presents an Adaptive Delay-Tolerant Robust Predictive Current Controller based on a QRD-RLS identification technique. This control can be applied to both single and three phase grid-tie voltage source inverters. The control strategy, based on an extended model that include delays (integer computational delay plus effective delay), employs full state feedback, a predictions observer and an identification algorithm in order to obtain a true dead-beat ripple free response. Due to its adaptive capability, this control has a great robustness to parametric variations and presents low steady-state current error. Simulations results were carried out in order to asses the proposed technique.