Simulation and Comparative Analysis of DFIG-based WECS Using Stator Voltage and Stator Flux Reference Frames

This paper performs the control of the active and reactive power of DFIG-based WECS. The model of the WECS is oriented to both reference frames, stator voltage and stator flux, respectively; furthermore controllers for both reference frames are designed. A mathematical analysis of the dynamic behavior of spatial flux and stator voltage reference vectors is presented in order to carry out a comparison to determine which of them offers a better performance in the controlled variables, taking into account the particular scenario in which the WECS is going to be controlled. Highlighting is also given about the implications of using one or other of the selected reference frames. Simulation results of a 50 HP WECS are carried out in PSim software in order to show the performance of the WECS for every reference frame.