Robust Predictive Control of Grid-Tied Converters based on Direct Power Control

J. R. FISCHER; S. A. GONZÁLEZ; M. A. HERRÁN; I. CARUGATI; M. G. JUDEWICZ; D. O. CARRICA

IEEE TRANSACTIONS ON POWER ELECTRONICS

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

Lugar: New York; Año: 2013

0885-8993

This work focuses on the control of instantaneous complex power of a grid-connected VSI. In this work, a new space vector modulation based direct power control approach is proposed: the Robust Predictive Direct Power Control (RP-DPC). The proposed predictive control algorithm ensures that both, instantaneous real and imaginary powers track the reference with high speed and accuracy reducing steady-state errors. In order to reduce the Total Harmonic Distortion (THD) in the output currents, a Fundamental Frequency Positive Sequence detector is used in conjunction with a prediction Grid Voltage Observer. Comparative simulations and experimental results of a 10kW three-phase grid-connected VSI showing the steady-state and transient performance of the proposed RP-DPC are given. A low THD and balanced output currents are maintained even under Severe Voltage Unbalance conditions.