Advanced Wind Turbine Program Next Generation Turbine ... - NREL
Advanced Wind Turbine Program Next Generation Turbine ... - NREL
Advanced Wind Turbine Program Next Generation Turbine ... - NREL
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Gen. Torque (Nm)<br />
12000<br />
10000<br />
8000<br />
6000<br />
4000<br />
2000<br />
0<br />
PI(D) control of speed<br />
by blade pitch,<br />
max. torque saturated<br />
min. torque saturated<br />
blades saturated at fine pitch<br />
max. torque saturated PI control of speed<br />
blades saturated at fine pitch<br />
by generator torque,<br />
blades saturated at<br />
Optimal tip speed fine pitch<br />
PI control of speed ratio tracking<br />
by generator torque,<br />
blades saturated at<br />
Swith over max. min.<br />
fine pitch<br />
torque saruration<br />
-2000<br />
800 900 1000 1100 1200 1300 1400 1500 1600<br />
Gen. Speed (rpm)<br />
Figure 22. POC Main Control Cabinet<br />
3.1.4 POC 34-m Rotor Blade Design and Testing<br />
The POC1.5/70.5 configuration uses 34-m blades (GE34a), as shown in Figure 23. The GE34a<br />
blade employs a family of airfoils custom designed as part of the NGT project for the POC turbine.<br />
GE personnel and consultants designed a family of airfoils with the characteristics summarized<br />
in Table 4. In addition to the quantitative drivers shown in the table, GE also required that:<br />
49