Environmental Engineering Reference
In-Depth Information
Time (s)
Fig. 2.14
Aerodynamic torque: T
opt
(blue), T
a
real (red), T
a
observed (green)
Time (s)
Fig. 2.15
Torque tracking performance: Reference (blue) and real (green)
Time (s)
Fig. 2.16
Current I
rd
tracking performance: Reference (blue) and real (green)
2.4.4 Sensorless HOSM Control Performances
The performances of the proposed HOSM speed observer are illustrated by
Fig.
2.17
.
The
achieved
results
show
quiet
good
tracking
chattering
free
performances.
Figures
2.18
and
2.19
illustrate the HOSM sensorless control performances in
terms of DFIG rotor current and wind turbine torque. In this case, quiet good tracking
performances are achieved according to the wind fluctuations. As mentioned above,
