Abstract:
This paper presents theoretical, simulation, and
experimental study of the brushless doubly fed twin stator induction
generator (BDFTSIG) dynamics under vector control based
on the orientation on the power machine stator flux. A complex
transfer function is derived which links the control current and
power winding current space vectors in the field coordinates.
Based on this result, the transient response of the BDFTSIG to
step changes in the control current is examined theoretically.
The oscillatory transients are explained in detail and linked to
control flux transients triggered whenever operation point of the
generator is changed. Furthermore, BDFTSIG operation with
closed loop control of the power machine active and reactive
powers is examined theoretically and experimentally. It is shown
that in the closed loop operation, the system damping may be
reduced so that the PI controller gains must be properly selected
to achieve a good transient response.
