Study of doubly fed induction generator for wind power application

The paper is concerned with the control of doubly fed induction generator applied in wind power technology. Assuming stator flux oriented vector control, the torque and power relations are derived. Using the relations, the slip versus torque and slip versus stator reactive power characteristics are drafted in subsynchronous and in supersynchronous state for investigating the control possibilities of the generator side converter supplying the rotor circuit. The effects of the d and q component of the converter output voltage for the torque, power and speed are studies in qualitative and quantitative way. The active and reactive power flows in stator and rotor side are shown.

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