Simulation of CMV-minimized Direct Power Control for Doubly Fed Induction Generators

Nowadays the doubly fed induction machine is often used as generator in high power windenergy systems. Because of the use of two converters in the generator´s rotor circuit bearing damages can occurred specially for this type of machine. So the aim is to reduce the common mode voltage as one cause of bearing currents. Instead of a classic space vector modulation this paper presents the simulation of an enhanced direct power control.