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© P. Kundur

WTG -  9

Control of Rotor-Side Converter cont'd

In flux-based rotating frames:

changes in the d-axis component of current will lead to reactive power changes

changes in the q-axis component will vary active power

This allows independent control of active and reactive power of the stator

Implemented through rotor-side converter control

An important aspect of the DFIG concept !

Since rotor flux tracks the stator flux, air gap torque provides no damping of shaft oscillations

additional modulating signal has to be added

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