This manuscript presents the modeling and simulation studies of grid connected Doubly Fed Induction Generator (DFIG) based wind farm. In current scenario, DFIG is used for the large scale wind energy systems. DFIG is high sensitive for the faults on the system due to termi-nals of stator directly fed to the grid. In this work the dynamic response of the proposed system under varying wind speeds and three transi-ent faults at different locations for different durations are studied.

A copper wire wound on an iron rod called as an iron cored inductor. The impedance of an iron cored inductor can be varied by the different methods. In those, one of the methods is, placing an iron cored coil in the aluminium enclosure. Due to this, the effective impedance of an iron cored inductor is de-creased. If another coil is wound on the same core and placed in the aluminium enclosure, the induced EMF in another coil has increased. The detailed study of this effect is presented with numerical analysis in this paper.