Dynamic modeling and control of a brushless doubly-fed induction generator with a rotating power electronic converter

A different configuration of brushless doubly-fed induction generator is presented. The power electronic converters are mounted on the rotor rotating with it. The slip rings and carbon brushes are replaced by a rotating exciter which serves as a slip recovery device as well as a means of providing excitation to the rotor of the induction generator. The dynamic model of the brushless topology is derived and analyzed. Furthermore, feedback control of the topology is also implemented and analyzed. It is shown that the generator shows stable operation in steady state as well as in dynamic state at variable speeds.

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