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Hitachi

Wind Turbine

Rotor Diameter 80m
Swept area 4,978m2
Rotor location Downwind
Rotational speed 11.1~19.6min-1
Rated rotational speed 17.5min-1
Rotational direction Clockwise (from upwind)
Tilting angle -8°
Coning angle
Blade Quantity 3 pcs
Length 39m
Material GFRP (glass-fiber reinforced resin)
Gearbox Structure 1 planetary gear, 2 parallel gears
Gear ratio nearly 1:100 (50Hz)
nearly 1:120 (60Hz)
Generating system Generating system DFIG (doubly fed induction generator)
Rated generator output 2,000kW
Generator voltage 1,400V
Generator current 825 A
Number of generator poles 4 poles
Rated generator speed 1,736min-1 (50Hz)
2,098min-1 (60Hz)
Generator power factor 100% (operation range: delay 90% to advance 95%)
PCS cooling system Antifreeze circulation, wind-cooled
PCS control system Active power control
Incorporation-type transformer Capacity 2,222kVA
Transformer system Oil-immersed self-cooled
Voltage 22kV/1.4kV (Except 22kV series, the set-up transformer, panels, auxiliaries, etc. are placed outside of the tower)
Winding configuration Δ/Δ
Nacelle Material GFRP (glass-fiber reinforced resin)
Dimensions L11.5m/ W3.5m / H4.9m(H excludes the sensor mast.)
Tower Tower system Steel monopole
Anchor system Steel monopole (anchor ring)
Hub height 65m / 78m
Number of divisions 3 (65cm) / 4 (78cm)
System Output control Pitch, variable velocity
Cutin wind velocity 4m/s
Cutout wind velocity 25m/s
Maximum wind velocity 70m/s(3 seconds)、50m/s(10 minutes average)
Emergency brake Blade feather (independent pitch)
Maintenance brake Disc brake
Yaw control Active yaw
Standby for storm wind Free yaw
Lightning strength 250kA(peak current)
600C(total charge)
Environmental
conditions
Wind velocity class IIA+ (standard) (Provided that the IA type is possible depending on the wind velocity class of the tower)
lEC disturbance strength A
Operation temperature -20 to 40℃
Noise power level 103.8dBA
Altitude 1,000m or less
*
The specifications are subject to change without notice.

External view [78-meter tower type]

78-meter tower

*
The specifications are subject to change without notice.