Voltage complex feedback control for wind powered double fed induction generator

This paper deals with a voltage complex control intended to wind powered doubly fed induction generator in isolate site. Analysis developed in the complex model form of this machine demonstrates that is possible to create a linear decoupling control between rotor and stator voltages. Complex feedback voltage control is utilized in order to compensate the undesired complex coupled terms existing in the constituted voltage complex transfer function established from the complex machine model. The obtained complex feedback control is robust against machine parameters model variation and it is only related to the stator and rotor frequencies where the first one is fixed to its desired rated value and the second one is estimated from the measured speed. Also, a linear controller can be easily employed such as a PI controller designed by the pole placement method. Simulation tests confirm widely the feasibility and the effectiveness of the proposal control, especially, for an isolate electric site when the wind speed and power consumption may be varied.