无刷双馈电机建模仿真与功率解耦控制

Brushless doubly-fed machinegives upbrushes and slip rings. Its unique structure makes its dynamic modeling and control strategy different from ordinary AC motor.Based on brushless doubly-fed machine running principle and dynamic mathematical model, this paper established the dynamic model of the rotor speed dq axis rotary coordinate system, andset up the open loop modelin the simulation platform.The operation characteristics in the states of singly-fed asynchronous operation, doubly-fed synchronous operation,doubly-fed sub-synchronization operation and doubly-fed super-synchronization operation are analyzed.Furthermore, the variable frequency speed regulation characteristics of brushless doubly-fed machine are obtained.Finally, the power decoupling control of brushless doubly-fed machine is proposed based on stator flux orientation under the synchronous dq axis coordinate system, and its effectiveness is verified on the simulation platform. The results prove the correctness of the proposed control strategy.