Improved virtual flux-oriented model predictive power control of grid inverters

This paper proposes an improved virtual flux-oriented model predictive power control (IVF-MPPC) algorithm with the best output power performance of the grid inverter. The curve of the active power and reactive power change is discussed to select the optimal function, which not only helps to obtain the appropriate voltage vector and duty cycles of the power switch tubes, but also makes the ripple of the active and reactive power small, dynamic response of the output current fast and current THD low. On this basis, a more accurate mathematical model in αβ coordinates is established for control system. The simulation is stated to verify the reasonability and accuracy of the control algorithm.