Matlab Modeling and Simulation of Doubly-Fed Machine in Two-Phase Synchronous Rotating Frame

The essence of doubly-fed speed regulation is the frequency conversion speed regulation on the rotor side. Because the frequency converter connected to the rotor side only deals with the slip power, the capacity of the frequency converter can be significantly reduced when the speed regulation range is not large, thus greatly reducing the cost. In this paper, a simulation model of doubly-fed motor is constructed by Matlab/Simulink based on state equation after analyzing the mathematical model of doubly-fed motor in two-phase synchronous rotating dq coordinate system. Simulation experiment based on the simulation model is carried out and simulation waveform are proposed. The simulation results show that the doubly-fed motor simulation model can reflect the parameter change of doubly-fed motor under different working conditions correctly, and it is feasible and effective to use this model in doubly-fed speed regulation research.