Review and Improvement of Several Optimal Intelligent Pitch Controllers and Estimator of WECS via Artificial Intelligent Approaches - Complex System Modelling and Control Through Intelligent Soft Computations - page 515

(a)

9

8

7

6

5

4

0 10 20 30 40 50 60 70 80 90 100

time (s)

(b)

8

6

4

2

0

-2

0 10 20 30 40 50 60 70 80 90 100

time (s)

(c)

1.1

1.05

1

0.95

0.9

0.85

0.8

0.75

0.7

0.65

0.6

0 10 20 30 40 50 60 70 80 90 100

time (s)

(d)

1.2

1.1

1

0.9

0.8

0.7

0.6

0.5

0.4

0 10 20 30 40 50 60 70 80 90 100

time (s)

Fig. 10 Evolution of control and power alteration parameters in FRENGA. a Tipspeed ratio.
b Pitch angle. c Controlled torque. d Output aerodynamic power of wind turbine in Pu