Wind Energy Systems - Wind Energy Systems for Electric Power Generation - page 97

Table 5.1 (continued)
Manufacturer ENERCON GmbH Siemens Wind

Power GmbH

Nordex AG

Type E-70 2,3 MW/82-VS N90

Rated power 2300 2300 2300 kW

12 ∗ / 2 , 5 ∗ / 28 ... 34 Rated/cut-in/cut-off-wind 13-14/3-4/25 13/3/25 m/s

velocity
Rotor
Diameter/swept area m / m 2

71,0/3959 82,4/5333 90

No. of blades 3 3 3

min − 1 Rotational speed 6 ... 21,5 6-18 9,6-16,9

Gear box
stages/ratio - 3/1:91 3/1:77,4

Generator
Type SM IM, fully fed IN, doubly fed

min − 1 speed 6 ... 21,5 550 ... 1600 740 ... 1310

Voltage 400 690 660 V

Grid paralleling method Converter converter converter

Control/Safety
Power limitation Pitch pitch pitch

Main brake Blade angle var. Blade angle var. Blade angle var

2nd brake Blade angle var. Disk brake Disk brake

Masses
Rotor 31 , 7 ∗ 54 53 t

68 , 8 ∗ Nacelle except rotor 82 91 t

To w e r
Hub height 64/85/99/113,5 58,5/90/100 80/100/105 m

Reference yield
Energy yield 4814 5734 MWh/a

at height of tower 85 80 m

b) 2300 kW class