Environmental Engineering Reference
In-Depth Information
1.1 f
sg
estimation
(a)
8
6
fault estimation
4
2
0
0
100
200
300
400
500
600
Tim e(s)
0.9 f
sg
estimation
(b)
2
0
-2
fault estimation
-4
-6
-8
0
100
200
300
400
500
600
Tim e(s)
Fig. 7.16
Estimation of 1.1 a and 0.9 b sensor bias faults
7.7 Conclusions
In this chapter, the concept of wind turbine operation, the definition of the control
problems, modes of operation and the non-linear and T-S fuzzy model of wind
turbine are presented.
Generally, wind turbine control objectives are functions of wind speed. For low
wind speeds, the objective is to optimise wind power capture through the tracking
of optimal rotor speed signals. Once the wind speed increases above its nominal
value the control objective moves to the rated regulating power.
Specifically, in the low wind speed range of operation, the controller optimises
power capture through controlling the generator torque so that the wind turbine
rotor speed follows the optimal rotor speed.
