CARATTERISTICHE TECNICHE Clipper 2.5 MW
General
Specifications:
Type Horizontal Axis
Number of Blades 3
Orientation Upwind
Operation Variable Speed
Rotor Speed 9.6 15.5 rpm
Hub Height 73.5m or 80m
Primary Braking Aerodynamic, Full-Span Blade Pitch
Power Output 2500 kW
Yaw Active
Cut-in Wind Velocity 4 m/s 10 min average
Cut-out Wind Velocity 25 m/s 10 min average
Cut-out Wind Gust 29 m/s 3 sec average
3. Rotor
Diameter 93 m
Swept Area 6793 m2
Type of Blades Clipper Designed
Tilt 5.5Ί
Tip Speed at Rated Output 75 m/s
4. Blade
Blade Length 43.2 m, 45.2 m, 48.2 m
Material Fiberglass Reinforced Epoxy
Maximum Chord Length 3.9 m
5. Pitch System
Type Individual Blade Pitch Failsafe
Drive Electro-mechanical Gearmotor
Motor Type DC Servo-drive
Failsafe Braking Battery Powered
Blade Bearings Internal Gear Ball Bearing
6. Hub
Type Spherical
Material Ductile Cast Iron
7. Gearbox
Type Distributed Generation
Gear Arrangement Multi-output , 2 Stage
Output Shafts 4
Ratio 1:73.13
Rated Power 2675 kW
Housing Material Ductile Cast Iron
Mainshaft Forged Steel
Main Bearings Tapered Roller
Lubrication Forced Mechanical Pump
Filtration Multi-element Course/Fine
Cooling Radiator
8. Generators
Type Synchronous Permanent Magnet
Number of Units 4
Operational Speed Range 710 1,133 rpm
Rated Power 656 kW at 1120 rpm
Voltage 1,000 1,350 VDC
Enclosure IP54
Insulation Class H
Cooling Air Cooled
9. Parking Brake
Type Dual Disk w/ Hydraulic Calipers
Location Gearbox Intermediate Stage
10. Machine Base
Material Ductile Cast Iron
11. Yaw System
Type Multiple, Electro-Mechanical Drives
Bearing Internal Gear Ball Bearing
Drive Planetary Gearmotor
Motor AC Induction
Number of Drives 4
Brake Active Hydraulic Disk
12. Tower
Type Partial Conical Tubular
Material Steel Plate
Sections 4
13. Power Converter
Type PWM 4 module IGBT Rectifier/Converter
Controller DSP
Rated Power 2525 kW
Location Within Tower Base
Power Factor Unity
14. Controller
Voltage 3 X 690 VAC
3 X 480 VAC
3 X 240 VAC
1 X 120 VAC
Frequency 47 63 Hz
Computer Embedded Power PC
Configuration Embedded Single Board System with Connectors
Operator Interface Palm Top or Laptop PC compatible
SCADA Standard Fiber Optic or Copper Serial Interface
15. Environmental Application Limits
Survival Wind Velocity According to IEC Ia, IIa, and IIIa
Operational Ambient Temperature -20Ί C to +40Ί C
Operational Ambient Temperature -40Ί C to +40Ί C (Available Option)
Survival Temperature -40Ί C to +50Ί C
16. Grid Compatibility
Frequency Continuous 50 Hz or 60 Hz ± 3 Hz
Line Voltage Continuous 690 VAC ± 10%
Line Voltage 5 sec 690 VAC ± 20%
Line Voltage 500 ms 690 VAC ± 30%
Line Fault Ride-thru Capability -90% of Nominal Line for 150 ms
Line Phase Imbalance Continuous ± 5% at Rated Power
Line Phase Imbalance Cut-in ± 10%
Line Phase Imbalance 5 sec ± 10% at Rated Power
Line Phase Imbalance 5 sec ± 20 % at Cut-in
Power Quality IEEE 519 Compliant
17. Lightning Protection
Blade Tip Receptor Internal Down Conductor
Nacelle Air Termination Full Shielded (Faraday Cage)
Electrical Systems IEC 61400-24 Level III
18. Noise Performance
SPL at 8 m/s 106 +/- 2 db (A) According to IEC 61400-11
19. Maintenance Interval
Post-Commissioning Once at 500 Hours
Periodic Every 12 Months
20. Weights
Tower Assembly 452,000 lbs.
Rotor Assembly 117,000 lbs.
Nacelle Assembly 158,000 lbs.
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