Environmental Engineering Reference
In-Depth Information
w
g
T
sp
T
H∞
H
∞
Generator
Torque Controller
+
a
Tss
Nominal Gen Torque
ew
g
β
β
H∞
H
∞
Collective Pitch
Controller
+
a
Tfa
C2=on
Gain Scheduled
Collective Pitch
Controller
β
GS
ew
g
+
-
C3=on
Nominal Gen Speed
p
Low
Pass
Filter
Varying
Parameter
Calculator
β
LPVf
Fig. 5.15
Diagram of C2 and C3 control strategies
Table 5.3 Frozen output sensitivity analysis
Wind speed (m/s)
p value
Output sensitivity peak
(dB)
Output sensitivity
bandwidth (Hz)
C1
C2
C3
C1
C2
C3
13
6.06
3.35
2.52
0.037
0.035
0.037
-6
15
6.06
3.59
2.87
0.045
0.044
0.059
-4
17
6.09
4.31
3.12
0.052
0.057
0.074
-2
19
6.31
5.29
3.31
0.058
0.070
0.085
0
21
6.00
5.78
3.50
0.061
0.078
0.090
2
23
6.05
6.70
3.67
0.065
0.089
0.097
4
25
6.04
7.84
3.93
0.069
0.10
0.105
6
5.4 Simulation Results in GH Bladed
The control schemes explained in the closed loop analysis are included in the
External Controller [
46
] in GH Bladed and different simulations are carried out
using the Upwind non-linear wind turbine model with special wind conditions. The
simulation analysis with the non-linear model is divided into two main steps:
• The analysis of a power production wind in above rated zone, in this case with
a mean wind speed of 19 m/s, to see the time domain response of regulated
signals. Also, the Power Spectral Density (PSD) of different signals within the
