DEC Dongfeng Electric Machinery Co., Ltd.
DEC Dongfeng Electric Machinery Co., Ltd.
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3.2 MW Direct - Drive Wind Power Turbine Generator
Feature
Applicable Wind Class:5.0-7.5m/S
Unit Capacity: 3.0-3.2MW
Rotor Diameter: 155m
Tower Height: Site Specific with Traditional and High Type Option
D4000-148 Specification
| No. | Item | Unit | Specification |
| Overall Wind Turbine | |||
| 1 | Rated Power | KW | 3000/3200 |
| 2 | Cut-in Wind Speed | m/s | 2.5 |
| 3 | Rated Wind Speed | m/s | 9/9.5 |
| 4 | Cut-out Wind Speed (10 min) | m/s | 20 |
| 5 | Survival Wind Speed (3s) | m/s | 52.5 |
| 6 | Operation Temp.(Standard Air Density) | ℃ | -30~40 |
| 7 | Survival Temp. (Standard Air Density) | ℃ | -40~50 |
| 8 | Design Lifecycle | Year | ≥20(onshore) |
| Rotor | |||
| 1 | Rotor Diameter | m | 148 |
| 2 | Swept Area | ㎡ | 17203 |
| 3 | Blade Length | m | 72.5 |
| 4 | Blade Material | GFRP | |
| Gearbox | |||
| Gearbox | |||
| 1 | Gearbox type | N/A | |
| 2 | Transmission Ratio | N/A | |
| Generator | |||
| 1 | Type | Permanent Magnet Synchronous Generator | |
| 2 | Rated Power | kW | 4250 |
| 3 | Rated Voltage | V | 720 |
| 4 | Insulation Class | F | |
| Converter | |||
| 1 | Type | Full Power Converter | |
| 2 | Power Factor | -0.95～+0.95 | |
| 3 | Rated Frequency | Hz | 50 |
| 4 | Rated Output Voltage | V | 690 |
| 5 | Input/output Frequency Range | Hz | ±2.5 |
| Yaw System | |||
| 1 | Yaw Driver | Electric Drive/ Four Grade Planetary Reducer | |
| 2 | Yaw Brake | Electromagnetic Brake + Hydraulic Brake | |
| 3 | Yaw Speed | °/s | ≤0.3 |
| Lightening protection | |||
| 1 | Design Standard | IEC 61400/24-2010, IEC 62305-2006, GL Guideline | |
| 2 | Grounding Resistanc | Ω | Power Frequency Grounding Resistance of Unit Turbine ≤4 |
| Tower | |||
| 1 | Type | Steel Conical Tower | |
| 2 | Hub Hight | m | 90/95/100 |
Higher safety and reliability
Direct-drive Technology, Shorter Driven Chain with no High-speed Rotation Components, Higher Reliability
No Lubricating oil system for High-speed Driven Chain, No Slip Ring. Decreasing fire hazard, Higher Safety
Double safety chain design based on patent technology to eliminate speeding accidents and further improve safety
Self-developed electrical system, Mean Time Between Failures(MTBF) is over 2000 hours
The patented technology of magnetic steel box protection prevents magnetic steel from demagnetizing and falling off. No replacement of generator
Excellent Power Generation Performance
155m big rotor diameter, rated power adjustable from 3.0MW to 3.2MW, annual Equivalent Full Load Hours are over 2100h at mean wind speed of 5m/s
More than 60 years' experience on R&D and manufacturing of generating equipment, generator efficiency is 1%~3% higher among domestic market
High efficiency blade design with additional sawtooth, trailing edge and vortex generator, Cp value is higher than 0.49
Self-developed control system perfectly matches the blade to the maximum capture wind energy
Lower Project Capex
Compared to 2.0/2.5MW turbine, the number of units can be reduced by 17~34%, the capex for land acquisition, road construction, equipment instalation, transmission line, etc. can be reduced significantly
Lower O&M Cost
Direct drive technology,without regular replacement of gearbox oil,filter element,and carbon brush of generator,less maintenance duration
Fewer components,lower failure,shorter downtime due to regular maintenance,less AEP loss
Less consumable material to lower O&M cost