power curve of wind turbine

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2.500 2.000 1.500 1.000 500 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 v [m/s] E_Initial [MWh] P_B [kW] hw_100m (v) [%/m/s] P_Initial [kW] E_B [MWh]
350 300 250 200 150 100 50 0 0 1 2 3 v [m/s] E_Initial [MWh] P_A [kW] hw_100m (v) [%/m/s] P_Initial [kW] E_A [MWh] 4 5 6 7
Control Systems and Automation of Wind Power Plants
Wind Profile List, Sylt (1971-80)
hw_12,1m (v) hw_100m (v) Wind Data 8,00 2,15 7,08 12,1 0,01 Hub Height 10,38 2,15 9,19 100 0,01
Control Systems and Automation of Wind Power Plants
Control Systems and Automation of Wind Power Plants
Beyland, Lutz
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Influence of optimised power curve to the energy output
Smooth Cut-Off
P [kW] E [MWh]
Energy Output - C
Beyland, Lutz
Control Systems and Automation of Wind Power Plants
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Influence of optimised power curve to the energy output
Summary
• Optimising the transition from partial to full load has biggest
effect on energy output >> Turbulence intensity is determining!
• Cutting-In later causes only small losses • Smooth Cut-Off has nearly no effect on energy yield
P [kW] E [MWh]
Energy Output - Initial
h(v) [%/m/s] 9 8 7 6 5 4 3 2 1 0
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 v [m/s] E_Initial [MWh] P_Initial [kW] hw_100m (v) [%/m/s]
Influence of Optimised Power Curve to the Energy Output
Lutz Beyland 07.12.2009 Control Systems and Automation of Wind Power Plants Master-Course Wind-Engineering WS 2009/2010 Prof. Dr.-Ing. R. Schütt
P [kW] 2500 2000 1500 0,3 1000 0,2 500 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 v [m/s] 0,1 0
- Cut-In at 2 m/s - Cp-max at 10 m/s
Enercon E-82
CP 0,6 0,5 0,4
B
1.500
C
1.000 500 0 0
1+2
A
2 4 6
3
8 10 12 14 16
4 5 6+7
v [m/s]
Control Systems and Automation of Wind Power Plants
Beyland, Lutz
7
Influence of optimised power curve to the energy output
Beyland, Lutz
12
Influence of optimised power curve to the energy output
References
/1/ Hau, Erich: Windkraftanlagen, Springer, 2008 /2/ Enercon Windenergieanlagen, brochure, download on 01.12.2009 at /3/ Forschungsgruppe Windenergie, Uni Münster, download on 01.12.2009 at http://www.iwr.de/wind/wind/bilder/l_s_b.jpg /4/ Schütt, Reiner: Lecture notes of „Control Systems and Automation“, winter semester 2009/10
Scenario A Cut-In-Later Energy [MWh] Difference [MWh] Difference [%] 9.501 -11 -0,11 Scenario B Sharpe Edge 9.637 125 1,32
Beyland, Lutz
Scenario C Smooth Cut-Off 9.519 7 0,08
influence?
• Target: Show the influence of optimisations for an
Enercon E82 placed at List, Sylt
• Remark: The following examination is dealing with 3-bladed,
Cut-In Later
P [kW] E [MWh]
Energy Output - A
h(v) [%/m/s] 9 8 7 6 5 4 3 2 1 0
Cut in velocity of 4 m/s compared to 2 m/s (initial value) Loss in energy yield: 10,7 MWh (-0,1% only!)
Beyland, Lutz
8
Influence of optimised power curve to the energy output
Sharp Edge
P [kW] E [MWh]
Energy Output - B
ቤተ መጻሕፍቲ ባይዱ
h(v) [%/m/s] 10 9 8 7 6 5 4 3 2 1 0
“Sharp edge” at 10 m/s (discrete partialfull-load crossing) Gain in energy yield: 125,2MWh (+1,2%)
Control Systems and Automation of Wind Power Plants
Beyland, Lutz
6
Influence of optimised power curve to the energy output
Operation Modes
P [kW]
Power Curve – Operation Modes
h(v) [%/m/s] 10 9 8 7 6 5 4 3 2 1 0
“Smooth Cut off” 25 – 30 m/s (full-load-overload crossing) Gain in energy yield: 7,3 MWh (+0,1%)
2.500 2.000 1.500 1.000 500 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 v [m/s] E_Initial [MWh] E_C [MWh] P_Initial [kW] hw_100m (v) [%/m/s]
horizontal axis WEC with pitch control!
Control Systems and Automation of Wind Power Plants Beyland, Lutz 2
Influence of optimised power curve to the energy output
Control Systems and Automation of Wind Power Plants
Beyland, Lutz
13
Operation Modes: 1: stand still 2: under load 3: partial load 4: partial-fullload crossing 5: full-load 6: full-load-overload crossing 7: overload
2.500 2.000
11
Control Systems and Automation of Wind Power Plants
Influence of optimised power curve to the energy output
Thank you for your attention!
Control Systems and Automation of Wind Power Plants
Control Systems and Automation of Wind Power Plants