Power Control for Grid-Connected Converter Based on Generalized Predictive Current Control

Abstract

The power control based on the generalized predictive current control (GPCC) applied in the power electronic converter connected to the grid is presented in the article. A design process of the control structure and its parameters and the results of simulation and experimental validation are presented. The power responses to changes in power references and grid failures are shown and discussed. The algorithm works well with the unbalanced grid voltage. Steady-state responses of both powers are oscillation-free for an unbalanced grid, and the network currents remain sinusoidal at the same time. The strategy is also able to ensure that limit values of grid current magnitudes are not exceeded during changes of power references or grid voltage, and responses are fast and smooth at the same time. The combination of these favorable properties, which was not observed with other power control methods, can be assessed as the main benefit of the strategy developed.