This article presents a direct torque control of doubly-fed induction generators with a space vector modulation scheme for wind energy conversion. The scheme is to independently control the torque and reactive power flow of the doubly-fed induction generator and directly compute the voltage acting on the rotor winding from the differences between reference values and feedback quantities. As the proposed algorithm is more robust and has less harmonic distortion than the hysteresis direct torque control method, the algorithm will be of great interest to fellow researchers working on doubly-fed induction generators. Computer simulation and experimental results are reported as a validation of the scheme.
- Direct torque control
- Doubly-fed induction generators
- Variable-speed generation