Transient Behavior of Doubly Fed Induction Generator Using Simulink Model in Wind Energy Conversion System

In this paper, transient behaviours of the Doubly Fed Induction Generator using Simulink model is demonstrated. A mathematical model based on d-q transformation i.e. stator phase currents, rotor currents, stator flux linkages,rotor flux linkages ,instantaneous power electromagnetic torque is also presented. In this paper 9 MW wind farm consisting of six 1.5 MW wind turbines connected to a 25 kV distribution system exports power to a 120 kV grid through a 30 km, 25 kV feeder has been considered. It is concluded in proposed Simulink model, when 3phase symmetrical fault occur at the grid during t = 0.04s to t = 0.06s, the sudden voltage reduction gives to a lower power injection into the network both active power & reactive power are almost abrupt. This behaviour also depends on the rotor side converter during the fault.