Abstract

In this work, an inverter-side current control strategy for grid-connected VSI with LCL filters is proposed based on a generalized predictive control (GPC). The controller is designed taking into consideration harmonic distortion limits and robustness against filter component variations. To this end, a complete three-wire LCL filter model is obtained and impedance sensitivity to each component variation is analyzed. Finally, its performance is evaluated by means of simulations and compared with a predictive deadbeat (PDB) controller.

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