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© P. Kundur

WTG -  6

Doubly Fed Induction Generator (DFIG)

Wound rotor induction generator with slip rings

Rotor is fed from a three-phase variable frequency source, thus allowing variable speed operation

reduction of mechanical stress; higher overall efficiency, reduced acoustical noise

The variable frequency supply to rotor is attained through the use of two voltage-source converters linked via a capacitor

Note: A more appropriate designation for   this type of generator is: Doubly Fed Asynchronous Generator

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