Dynamic Modeling & Active and Reactive Power Control of DFIG for Wind Power Generation

This paper presents the simulation of dynamic modeling & active and reactive power control of doubly fed induction generator for variable speed wind energy system. The main reason for the popularity of the doubly fed wind induction generator connected to the power network is its ability to supply power at constant voltage and frequency while the rotor speed varies. The doubly fed induction machine is modeled in synchronous rotating reference frame theory with vectorized dynamic model, the advantage of this model we can use for both motoring and generating mode of operation. The choice of synchronous rotating reference frame makes it particularly favorable for the simulation of double-output configuration in transient conditions. The injected rotor voltages (at slip frequency) are derived from PI controllers that regulate the active and reactive powers delivered by the generator. The main goal of this project is to simulate doubly fed induction generator (DFIG) & to control the rotor and stator voltages by injecting the proper rotor voltage to the DFIG derived from PI controller. The complete simulation model is developed for such machine under variable speed operation using MATLAB Simulink.