Simulation Research of Brushless Doubly-fed Generator and Its Control Strategy

A dq0 model based on rotor mechanical velocity reference and a MT model based on stator synchronous velocity reference of brushless doubly-fed generator were gave and a grid control strategy without load of brushless doubly-fed generator was proposed. The basic idea of the control strategy is using the given value of active and reactive power of the generator under stator synchronous velocity reference to calculate given voltage of stator windings at the control side, then inputting the calculated result after 2r/3s transformation into SVPWM modulation model to generate PWM signal for controlling turn-on and turn-off of switching tube of converter at generator side so as to generate required voltage and current of stator control windings. Models of brushless doubly-fed generator and its control system were established in Matlab/Simulink software, and dynamic performances of the generator were simulated in cases of no load and grid. The simulation results verified correctness and effectiveness of the models and the control strategy.