Active and reactive power control of doubly fed induction generator using direct power control technique

In this paper a direct power control technique has been proposed for a doubly fed induction generator (DFIG) used in wind power conversion system. In the system DFIG rotor voltages are controlled at each switching period based on the active and reactive powers. In order to test the proposed control technique, an experimental test bed has been established. The experimental test bed consists of a DFIG, induction motor with variable speed driver and a bi-directional back-to-back converter. TMS320F2812 microcontroller has also been used to control the system. The proposed control algorithm has been prepared with the help of Matlab&Simulink program. The experimental results show that the DFIGs stator active and reactive powers can successfully follow the reference active and reactive power values under different operating conditions, such as different rotor speed and active and reactive powers. It´s also concluded that the total harmonic distortion of stator currents stays in the boundaries of the standards under proposed control algorithm.