Environmental Engineering Reference
In-Depth Information
Fig. 6.7 Wind profile
20
19
18
17
16
15
14
13
12
11
10
300
350
400
450
500
550
600
[Time]
Table 6.3 Normalized
values for standard deviation
of drive train oscillations
Baseline Constrained gain
1
0.93
This means, in terms of standard deviation, the constrained gain
is 7 % better than the baseline.
Fig. 6.8 Generator speed
1600
Constrained controller
Baseline controller
1500
1400
1300
1200
1100
1000
900
350
400
450
500
550
[Time]
sensors in the feedback loop fails, only one of the blades will directly experience
this failure. This can be achieved with a decentralized individual pitch controller.
It is seen from Figs.
6.8
,
6.9
,
6.10
,
6.11
and
6.12
that the controller behaves in a
