The discussion centers on the use of double fed wound rotor induction generators (DFIG) in wind turbines and the necessity of converting AC to DC and back to AC for grid connection. Participants highlight that direct connection from the generator to the grid is impractical due to the need for voltage, frequency, and phase alignment with the grid. The DFIG system allows for efficient control of these parameters, making it a suitable choice for wind energy applications.
PREREQUISITESEngineers, renewable energy specialists, and anyone involved in the design and operation of wind turbine systems will benefit from this discussion.
skeptic2 said:In order to connect to the grid the voltage, frequency and phase would have to closely match that of the grid. How would you accomplish that?
Frankly I have wondered why they couldn't use a DC generator, but instead of a DC field on the generator, connect the field coil to the grid at the right phase to produce an output in phase and at the same frequency as the grid.