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(a)
9
8
7
6
5
4
0
10
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100
time (s)
(b)
10
8
6
4
2
0
-2
0
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(c)
time (s)
1.1
1.05
1
0.95
0.9
0.85
0.8
0
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time (s)
(d)
1.1
1
0.9
0.8
0.7
0.6
0
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90
100
time (s)
Fig. 15 Evolution of control and power alteration parameters in TFGS. a Tipspeed ratio. b Pitch
angle. c Controlled torque. d TFGS output aerodynamic power of wind turbine in Pu
wind turbulence extremely. Simulation results of this method indicate that output
power intensity had downfall and rise dramatically.
An output power leveling control strategy of wind farm based on both average
wind farm output power and standard deviation of wind farm output power has
been offered fuzzy logic neural network and used in the variable pitch angle wind
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