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3.01 MW Demonstration Wind Farm
Various Wind Energy technologies in Complex Terrain topography

Location: Lavreotiki, SE Attica, Greece

Wind Park photo
( Photo taken from the 100m high meteo-mast, situated NNW of the Wind Farm, before the nacelle installation of the -600 )

On-Line monitoring of the Wind Farm, using a mobile phone:
Send an SMS message with the character ? to +30 6944 560 987 and you will receive instantly the last 10min statitistics of the Wind Farm operation.

 

 

ENERCON

..

iW

( interWind )

..

iW

( interWind )

E40-500

V47-660 kW

NM 750/48

OA500

OA600

Rotor

 

 

 

Diameter:

40 m

47 m

48.2 m

39.83 m

40.58 m

Area swept:

1275 m2

1735 m2

1824 m2

1246 m2

1293 m2

Speed of revolution:

variable, 18 - 38 rpm

28.5 rpm

22/14 rpm

Variable, OPSC (Opti Power Speed Control)
0 29 rpm

Variable, OPSC (Opti Power Speed Control) ,
0 29 rpm

Number of   blades:

3

3

3

3

3

Length of blades:

19 m

 

 

  19m

19m

Blade material:

fiberglass (reinforced epoxy) with integral lightning protection

 

 

LM 19.1 Type (Denmark) stall type, with integral lightning protection

LM 19.1 Type (Denmark) stall type, with integral lightning protection

Tip speed:

38 - 80 m/s

 

 

 

 

Type:

upwind rotor with active pitch control

Upwind rotor 

Upwind Rotor

Upwind rotor

Upwind rotor

 

 

 

 

 

Tower

 

 

 

Type:

 

 

Conical, steel, painted

Steel, painted Quality St52-3N

Steel, painted Quality St52-3N

Hub height(approx,)

44m

45m

45m

38 m

38 m

 

Generator

Type:

direct-driven ENERCON ring generator (with drive train)

Asynchronous with OptiSlip

Asynchronous, 4/6 pole

3 phase, Asynchronous, 4 pole

3 phase, Asynchronous, 4 pole

Name plate rating:

500 kW

660 kW

750/200 kW

573 kW (ambient temp. 40C, 29rpm), 530kW continuous (ambient temp. 47C, 29rpm, or 40C, 25rpm)

670 kW (ambient temp. 40C, 29rpm), 600kW continuous (ambient temp. 48C, 29rpm, or 40C, 24rpm)

Nominal Voltage:

690 V

690 V

690 V

690 V

Nominal frequence:

50 Hz

50 Hz

50 Hz

50 Hz

50 Hz

Hub:

Rigid

Cooling:

Liquid-cooled with pump

Self cooled

Self cooled

Operational data

Nominal output:

500 kW

660 kW

750 kW

500 kW

600 kW

Cut-in wind speed:

2.5 m/s

4 m/s

4 m/s

4 m/s

4 m/s

Cut-out wind speed:

25 m/s

25 m/s

None

None

Nominal wind speed:

12 m/s

15 m/s

16 m/s

14.5 m/s

14.5 m/s

Power regulation:

Variable Speed + Pitch

Pitch/OptiSlip

Stall

Stall + OPSC + ALPC
ALPC=Active Limit Power Control

Stall + OPSC + ALPC
ALPC=Active Limit Power Control

Gearbox

Type:

Planet/parallel axles

Planetary - parallel axle

Full third base Planetary heavy type

Full third base Planetary heavy type

Ratio:

1:68.2

1:52.18

1:52.18

Main shaft:

Forged shaft and flange

 

Main bearing:

double-row tapered roller bearings

Spherical roller bearing

2 elastically couplings, one on the low-speed shaft and another on the high-speed shaft to the generator

2 elastically couplings, one on the low-speed shaft and another on the high-speed shaft to the generator

Cooling:

Liquid-cooled with pump

2 independent oil flow/cooling circuits 

2 independent oil flow/cooling circuits 

Control

Braking system:

3 independent pitch-control systems with emergency supply

rotor brake

rotor lock for service and maintenance

Air brake: Feathered.

 

Blade tip air brake: Hydraulic, fail-safe

Disk brake: Hydraulic, fail-safe

  2 Disk brakes. 2 independent hydraulic circuits (low-speed & high-speed brake, fail-safe emergency type)

  Normal braking to zero speed via inverter current (public network intact, no emergency!)

  Emergency braking via DC current powered from inverter (Emergency but network intact)

  Over-torque limiting system (in case of generator short-circuit).

  2 Disk brakes. 2 independent hydraulic circuits (low-speed & high-speed brake, fail-safe emergency type)

  Normal braking to zero speed via inverter current (public network intact, no emergency!)

  Emergency braking via DC current powered from inverter (Emergency but network intact)

  Over-torque limiting system (in case of generator short-circuit).

Yaw control:

active through adjustment gears, friction damping

 

Type: Ball bearing

Yaw Brake: 3 Friction brake/motor brake

Drive mechanism: 4 electrical planetary gears

   Ball bearing

   2 friction fail-safe type electrical motor brakes

   Drive mechanism: Two AC gear motors driven via a 4-quadrant AC converter-inverter system.

  Speed and continuous soft position control.

  Gearbox, total 6416.6:1

  Ball bearing

2 friction fail-safe type electrical motor brakes

   Drive mechanism: Two AC gear motors driven via a 4-quadrant AC converter-inverter system.

  Speed and continuous soft position control.

  Gearbox, total 6416.6:1

Type:

 

Microprocessor - based control of all turbine functions with the option of remote monitoring.
OptiSlip output regulation and OptiTip pitch regulation of the blades

Type: Computer controlling

Computer controlling: Soft by thyristors

Capacitor bank:

No-load compensated

Remote control: By modem

  PLC based control of all turbine functions with master-slave units, remote controlling and monitoring by modem or remote network.

  OPSC + ALPC of the Electrical power.

  Continuous dynamic control of PF (-0.8 to +0.8) by pulsed, IGBT type active line converter. Ability of producing additionally reactive power until nominal input current.

  PLC based control of all turbine functions with master-slave units, remote controlling and monitoring by modem or remote network.

  OPSC + ALPC of the Electrical power.

  Continuous dynamic control of PF (-0.8 to +0.8) by pulsed, IGBT type active line converter. Ability of producing additionally reactive power until nominal input current.

 

Sensors

RPM sensors:

Rotor, generator, yaw system

Pulse generator on generator shaft

Pulse generator on generator shaft

Temperature sensors:

Gear, generator, controller

 Gear, generator, controller,hydraulic, ambient,bearings, drive

 Gear, generator, controller,hydraulic, ambient,bearings, drive 

Thermal sensors/warning:

Main switch, engine protection

   Gear, generator, controller,hydraulic, ambient,bearings, drive

 Gear, generator, controller,hydraulic, ambient,bearings, drive 

Vibration sensor:

Nacelle, rotor

  Nacelle

Nacelle

Meteorology:

Anemometer, wind vanes, thermometer

  Anemometer, wind vane

    Anemometer, wind vane

Hydraulic systems:

Pressure sensitive switches, pressure transducer

Pressure sensitive switches, pressure transducer 

Pressure sensitive switches, pressure transducer 

 

Lightning protection

 

Type:

According to standard IEC 1024

Lightning protection of all mechanical electrical electronic systems, from blade tips to base of tower.

Lightning protection of all mechanical electrical electronic systems, from blade tips to base of tower.

Blades:

Receptor in the blade tips

Nacelle: