Design of a Repetitive Control for a Three-Phase Grid-Tied Converter under Distorted Grid Voltage Conditions

The paper presents a design of repetitive control (RC) in the current system three-phase grid-tied converter. goal is to provide sinusoidal input filter currents under conditions distorted and asymmetrical grid voltage. A novel RC presented, which part not excited by sharp non-periodic changes reference signal, but it enables high-quality performance periodic disturbance conditions. In proposed system. cooperates with discrete state feedback controller. An innovative approach tuning parameters repetitive, as well controller, are selected result optimization process use particle swarm algorithm. verified experimentally on laboratory test bench. achieved results confirm performance.