A New Discrete-Time Robust Adaptive Predictive Control-Based RMRAC Applied to Grid Connected Converters With LCL-Filter

Wagner  B. da Silveira; Deise  M. C. Milbradt; Guilherme  V. Hollweg; Paulo  J. D. O. Evald; Rodrigo  V. Tambara; Hilton  A. Gründling

doi:10.48011/asba.v2i1.1752

Wagner B. da Silveira Federal University of Santa Maria
Deise M. C. Milbradt Federal University of Santa Maria
Guilherme V. Hollweg Federal University of Santa Maria
Paulo J. D. O. Evald Federal University of Santa Maria
Rodrigo V. Tambara Federal University of Santa Maria
Hilton A. Gründling Federal University of Santa Maria

DOI: https://doi.org/10.48011/asba.v2i1.1752

Keywords: Adaptive control, Robust control, Model predictive control, OSAP control, Grid-connected converters, LCL filter

Abstract

In this work, is developed a new discrete-time robust adaptive predictive control based on combining the adaptive structure of a Model Reference Adaptive Controller (RMRAC), to adjust gains online, with the control law One Sample Ahead Preview (OSAP), a particular case of deadbeat controller, for the current loop of a grid-connected voltage-source converter, also, this control not need resonant controllers to reject exogenous disturbances. A case application is presented, the grid-side currents control of a three-phase full-bridge static converter connected to the electrical grid by LCL filter. Simulation results are presented to show the performance of the proposed controller in a grid connected system.