Page 169 - Fluid Power Engineering

142 Chapter Seven

Wind speed-up in sector 0°
15
10
Speed-up [m/s] -5
5
0

-10
-15
0 2 4 6 8 10 12 14 16 18 20 22
Wind Speed at reference site [m/s]
Measurements Model: Mean
Model: Mean + 1 × StdDev Model: Mean − 1 × StdDev
(a)

Wind speed-up in sector 30°
15
10
Speed-up [m/s] -5
5
0

-10
-15
0 2 4 6 8 10 12 14 16 18 20 22
Wind Speed at reference site [m/s]
Measurements Model: Mean
Model: Mean + 1 × StdDev Model: Mean − 1 × StdDev
(b)

FIGURE 7-12a and b Matrix method computes mean and standard deviation of
wind speed-up in two sectors.

assume that the two distributions are dependent, and to use a joint
9
distribution. For details, see WindPRO .

Choosing a Method for Prediction
Several methods for prediction are described above. In order to find
the best predictor method, the following is estimated by examining
the distribution of the residual term for the concurrent measured and