Page 228 - Wind Energy Handbook
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202 WIND-TURBINE PERFORMANCE
12
11
KEY
10
10 min means
9 5 min means
8 1 min means
x ✻ 30 s means
Power (kW) 7
All values coincident
6
5
4
3 S.D. of Bins
2 Points in Bin
1 945 498 105 53
0
-1
-2
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14
Boom wind speed (m/s)
Figure 4.25 Power Curve Based on Boom Wind Speed Measurement
50
45
40 Uncorrected
Wind-turbine power (kW) 30
Corrected
35
25
20
15
10
5
0
0 2 4 6 8 10 12 14 16 18 20
Wind speed (m/s)
Figure 4.26 Correction of Power Curve for 2 s Averaged Data
Detailed aerodynamic experiments will often require the simultaneous measure-
ment of the transverse and vertical wind components, in addition to the long-
itudinal component measure by the cup anemometer. Very fast response sonic
anemometers are well suited to this purpose.
