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A Synchronous Reference Frame Robust Predictive Current Control for Three-Phase Grid-Connected Inverters

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4 Author(s)
Espi Huerta, J.M. ; Dept. of Electr. Eng., Univ. of Valencia, Burjassot-Valencia, Spain ; Castello-Moreno, J. ; Fischer, J.R. ; Garcia-Gil, R.

This paper presents a new predictive current control for three-phase grid-connected inverters in the synchronous reference frame. The control combines a deadbeat control law with a diagonal Luenberger observer to estimate the future value of the grid currents. It provides a decoupled control of the active and reactive power and offers robustness against the computational delay inherent in the digital implementation and against filter and grid-impedance uncertainties. This control exhibits a very fast current response while widely improving the gain and phase margins of the traditional predictive controllers.

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Industrial Electronics, IEEE Transactions on  (Volume:57 ,  Issue: 3 )