Wind Energy

166 J.J. Trujillo et al.
Normalized mean error [%]
25
20
15
10
5
0
−5
−10
−15
0
Normalized rmse [%]
Turbine 1
10 Turbine 1
Turbine 21
Turbine 21
Turbine 25
2 4 6 8 10 12 14
0
0
Turbine 25
2 4 6 8 10 12 14
Wind speed [m/s]
Wind speed [m/s]
(a) Mean error (b) rmse
Fig. 29.2. Normalized average mean error and rmse for turbines 1, 21, and 25.
Simulation with extended Jensen model. Data selected for free metmast inflow and
normalized with respect to power curve values at each wind speed
Normalized mean error [%]
25 50
20
15
10
5
0
−5
−10
−15
0
Normalized rmse [%]
Turbine 1
10 Turbine 1
Turbine 21
Turbine 21
Turbine 25
2 4 6 8 10 12 14
0
0
Turbine 25
2 4 6 8 10 12 14
Wind speed [m/s]
Wind speed [m/s]
(a) Mean error (b) rmse
Fig. 29.3. Normalized average mean error and rmse for turbines 1, 21, and 25.
Simulation with extended Ainslie model. Data selected for free metmast inflow and
normalized with respect to power curve values at each wind speed
References
1. OptiFarm TM : Wind farm management system. www.optifarm.de
2. J.F. Ainslie. Calculating the flowfield in the wake of wind turbines. J. Wind Eng.
Ind. Aerod. 27:213–224, 1988
3. B. Lange et al. Modelling of offshore wind turbine wakes with the wind farm
program FLaP. Wind Energy, (1):87–104, January/March 2003
4. IEC. International Standard IEC 61400–12 Wind Turbine Generator Systems –
Part 12: Wind Turbine power performance testing, 1st edition, 2, 1998
5. N. Jensen. A note on wind generator interaction. Technical Report M–2411, Risø
National Laboratory, DK4000 Roskilde, 1983
6. H.P. Waldl. Modellierung der Leistungsabgabe von Windparks und Optimierung
der Aufstellungsgeometrie. Dissertation, Universität Oldenburg, 175S, 1998
7. A. Wessel. Modelling turbulence intensities inside wind farms. In EUROMECH
464b Wind Energy, Carl von Ossietzky University, Oldenburg, 2005
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