Improved grid-photovoltaic system based on variable-step MPPT, predictive control, and active/reactive control

In this paper a grid connected photovoltaic system is presented. The presented system has two stages, the first is the MPPT strategy based on variable-step with predictive current control. In the second stage an active/reactive power control is uses to control a multilevel inverter for grid connection. All the system is developed in Matlab and simulated on Simulink for validation.