|
General
|
design
acc.
|
NEN
6096
|
|
cut
in wind speed
|
3
m/sec.
|
|
rated
wind speed
|
12
m/sec.
|
|
cut
out wind speed
|
25
m/sec.
|
|
survival
wind speed
|
60
m/sec.
|
|
nominal
power
|
250
kW
|
|
grid
voltage
|
400V
±10%
|
|
grid
frequency
|
50/60Hz
±3Hz
|
|
specific
power
|
354
W/m2
|
|
calculated
lifetime
|
min.
20 years
|
Rotor
|
n. of blades
|
2
|
|
|
|
rotor position
|
upwind
|
|
|
angle of the main shaft
|
7º with horizon
|
|
|
diameter
|
30 m
|
|
|
swept area
|
707 m2
|
|
|
speed
|
variable 35-70 rpm
|
|
|
power regulation
|
passive: blade-angle adjustment
|
|
|
|
active : fully variable mutator
system
|
|
|
min. blade-angle
|
1.0
|
|
|
cone-angle
|
183º – 170.5º
(flapping range)
|
|
|
direction
|
clockwise
|
|
|
location main bearing
|
attached to gearbox
|
Blades
|
blade length
|
13,4 m
|
|
|
|
weight one blade
|
327 kg
|
|
|
shape
|
linear
taper
|
|
|
chord
|
500 –
1,200 mm
|
|
|
twist
|
15º
|
|
|
material
|
carbon fibre reinforced epoxy
|
|
|
mounted
|
flexible
|
Gearbox
|
number
of stages
|
2
|
|
|
|
weight
|
1850kg
|
|
|
ratio
|
1:26.6
|
Generator
|
|
type
|
asynchronous
|
|
|
nominal
power
|
250
kW
|
|
|
number
of poles
|
4
|
|
|
nominal
voltage
|
230/400
volt
|
|
|
frequency
|
variable:
45 - 75 Hz.
|
|
|
weight
|
1550
kg
|
|
|
protection
|
IP
54
|
Grid
connection
|
converter
|
diode bridge - mutator
|
|
|
|
converter principle
|
AC - DC - AC
|
|
|
power
supply
|
400
V / 3 phase / 50 or 60 Hz.
(deviating voltage and frequency are available as an option)
|
Tower
|
type 1
|
conical tubular steel
|
|
|
|
number of sections
|
2
|
|
|
hub height
|
30 or
50
|
|
|
material
|
steel
|
|
|
location ascent
|
internal
|
|
|
|
|
|
type 2
|
|
lattice,
four-legged
|
|
|
hub
height
|
36 m
|
|
|
material
|
steel
|
|
|
location
|
ascent
internal
|
Controller
|
control by
|
PLC
|
|
|
|
remote monitoring
|
optional
|
Yaw
system
|
system
|
active
|
|
|
|
signal based on
|
wind vane
|
|
|
driven by
|
2 x e-motor with worm-wheel
reduction
|
|
|
power yaw-motor
|
2 x 1.5 kW
|
|
|
yaw speed
|
0.77º/sec.
|
|
|
yaw bearing
|
crown-bearing; externally geared
|
|
|
yaw-break
|
constant
friction-break; 8 pcs.
|
Safety
|
|
first safety system
|
passive blade pitch
|
|
|
activation
|
rotor speed (70
rpm)
|
|
|
second safety system
|
yawing out of the wind
|
|
|
activation
|
rotor speed (90 rpm)
excessive vibrations
failure anemometer or wind vane
failure in one of PLC´s
grid failure
too high generator or inverter temperature
fault in yawing system
|
|
|
brake blocking system
|
|
|
|
brake
|
parking
disk brake on high speed shaft of gearbox; for service purposes
|
|
|
rotor blocking system
|
pin in high speed shaft
|
|
|
activation
|
both
manual
|
Weights
|
rotor
|
2500 kg
|
|
|
|
nacelle including rotor
|
7500 kg
|
|
|
tower
excluding nacelle
|
14800
+ 8500 kg
|
Measured
actual power
The
curve data are valid for standard atmospheric conditions of 15° C air
temperature, 1013 mbar air pressure and 1.225 kg/m 3air density, clean
rotor blades and horizontal undisturbed air flow.
Measured production
The
annual energy production data for different annual mean wind speeds at
hub height are calculated from the above power curve data assuming a
Raleigh wind speed distribution, 100% availability and no reductions
due array losses, grid losses, or other external factors effecting the
production.
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|
