A new MPPT algorithm for PMSG based grid connected wind energy system with power quality improvement features

This paper deals with the analysis, modeling, and control system for PMSG based wind turbine connected to the grid. The system consists of a wind turbine, a three-phase IGBT based rectifier a three-phase four wire IGBT based inverter, a three-phase grid source which supplies the energy to nonlinear unbalanced load in case of an unavailability of wind energy. A control technique proposed for maximum power point tracking is presented. The use of indirect current control for three-phase inverter allows dc bus voltage regulation. To achieve balanced sinusoidal grid currents and unity power factor, the four-leg current controlled voltage source inverter is actively controlled under varying wind speed and pitch angle. Simulation studies using Matlab/Simpowersystem have shown promising results.