Doubly Fed Induction Generators (Part 2 of 2)

This video, from Columbia Gorge Community College, is the second of a two-part series on doubly fed induction generators (DFIG). In the video, instructor Jim Pytel introduces the concept of DFIGs and contrasts them with traditional synchronous and induction generators. 

During the video, Pytel explains how DFIGs operate when the prime mover exceeds synchronous speed. Pytel highlights how the rotors electromagnets rotate counterclockwise to maintain synchronization. The use of bidirectional AC-to-AC converters to allow power extraction from both the rotor and the stator is discussed, along with the efficiency gains at higher speeds. The video also compares the operation of DFIGs in hypersynchronous modes with traditional synchronous generators.

The video runs for 22:55 minutes in length. The first video of the series is available to view separately.