Control of doubly-fed induction generator for wind energy in network context

This study investigates a novel control methodology for the doubly-fed induction generators (DFIGs) in the real situation of wind energy generation when the machine is connected to a power system. The machine speed, DC voltage, active and reactive grid powers have been controlled using a reduced-order representation of the DFIG coupled to the grid. This framework allows several methods for the synthesis of the regulator. A state-feedback controller is designed based on the linear quadratic method. This regulator is tested in comparison with the standard vector control approach and the more recent flux magnitude angle control via simulations performed with Simulink and SimPowerSystem Toolbox of MATLAB.