Analysis of model predictive control for the active and reactive power in three phase grid connected inverters

摘要

This paper presents the mathematical modeling and analysis of model predictive based direct power control for real and reactive powers in three phase grid connected inverters. The voltage vector is selected by the minimization of the cost function of the power and applied for the next sampling period. By using the lagrange extrapolation the value of grid voltage is estimated and the value is adopted for the evaluation of predictive model for the power. By implementing the lagrange extrapolation the steady state errors and ripple of the normal predictive control are eliminated. The suitability of model predictive control for the control of active and reactive powers in grid connected inverters is confirmed in this paper.