Doubly Fed Induction Wind Generator Model and Its Operation Investigation

A Doubly-Fed Induction (DFIG) wind generator dynamic model is developed in PSCAD. Then a novel active power control strategy based on the indirect speed control is introduced to implement the power control tasks and the limits of these controls are also discussed. The novel strategy ensures that wind power generators without wind speed measurement can achieve the balance control and maximum power tracking to perform active power control tasks constrained by the available wind. In the simulation study, a single-machine infinite bus system with a wind turbine rated at 2 MW is conducted to demonstrate the behaviors of the generator in both steady state and transient state. The simulation results show a good performance of the dynamic model and the effectiveness of the control strategies.