Field Research Validation Sites
The National Wind Technology Center (NWTC) field-research site offers six wind turbines and four fully instrumented meteorological (met) towers that can support up to 32 possible field-research sites and 12 data sheds.
Many industry partners choose to work with the NWTC because of the ability to perform research validation on full-scale wind turbines under extreme conditions, including hurricane-force winds.
Features
- Turbine control systems
- Electrical distribution systems
- Telecommunications systems
- Variable-frequency drives
- Video monitoring
- Cooling systems
- Elevators
- Uninstrumented met towers
- Parts and specialized tool storage
Capabilities
- Study component controls, including new advanced actuators and sensors
- Look-ahead capability that can provide "feedforward control"
- High-bandwidth, independent pitch control of the Controls Advanced Research Turbine (CART) blades
- Variable-speed or constant-speed operation
- Address such issues as wind power plant underperformance and premature turbine component failure
- Data acquisition systems, instrumentation, and calibration
- Data analysis and systems and tools processing
Megawatt-Scale Research Turbines
U.S. Department of Energy 1.5-MW Turbine
- Model: GE 1.5-SLE
- Tower height: 80 meter (m)
- Rotor diameter: 77 m
- U.S. Department of Energy-owned; to be used for research and education
- Turbine commissioned in September 2009
Siemens 2.3-MW Turbine
- Model: SWT-2.3-108
- Tower height: 80 m
- Rotor diameter: 108 m
- Siemens owned and operated
- Multiyear cost-shared research and development (R&D) cooperative research and development agreement for aerodynamics and rotor performance
- 101-m turbine commissioned in October 2009; rotor change to 108 m in November 2013
GE 3-MW Turbine
- Model: ECO 110
- Tower height: 90 m
- Rotor diameter: 110 m
- GE (formerly Alstom) owned and operated
- Multiyear funds-in-agreement for testing and R&D
- 100-m turbine commissioned in April 2011; rotor changed to 110 m in February 2013
Gamesa 2-MW Turbine
- Model: G97
- Tower height: 90 m
- Rotor diameter: 97 m
- Gamesa owned and operated
- Multiyear funds-in-agreement for testing and R&D
- Class III turbine commissioned in November 2011; removed and replaced with G97 Class II machine and commissioned in March 2013
![A photo of two land-based megawatt-scale wind turbines with the ocean in the background under cloudy skies.](https://webarchive.library.unt.edu/web/20170107191238im_/https://www.nrel.gov/wind/assets/images/full-scale-field-research-facilities-and-capabilities-landing-megawatt-scale-research-turbines.jpg)
CARTs
CART2 600-kW Turbine
- Model: Westinghouse
- Blades: 2
- Hub height: 36.6 m
- Rotor diameter: 42.6 m
- Extensively instrumented
CART3 600-kW Turbine
- Model: Westinghouse
- Blades: 3
- Hub height: 36.6 m
- Rotor diameter: 42.6 m
- Extensively instrumented
![An aerial photo of two wind turbines and a meteorological tower against green landscape at the National Wind Technology Center.](https://webarchive.library.unt.edu/web/20170107191238im_/https://www.nrel.gov/wind/assets/images/full-scale-field-research-facilities-and-capabilities-landing-carts.jpg)
Met Towers
- One 135-m and one 80-m met tower
- Research-grade inflow measurements at multiple heights
- Reference for ground-based lidar and sodar comparison
- Characterize atmospheric conditions that affect turbine responses; support atmospheric science R&D
- Record the wind speed (sonic and cup anemometers), direction, temperature, humidity, and pressure used to derive wind shear, turbulence, air density, and stability.
![A photo of three wind turbines and a meteorological tower.](https://webarchive.library.unt.edu/web/20170107191238im_/https://www.nrel.gov/wind/assets/images/full-scale-field-research-facilities-and-capabilities-landing-met-towers.jpg)
Accreditations
The NWTC is accredited to perform the following research validation in accordance with international standards:
- Acoustic noise to International Electrotechnical Commission (IEC) 61400-11 and Measuring Network of Wind Energy Institutes (MEASNET)
- Power performance to IEC 61400-12-1 and MEASNET
- Mechanical loads to IEC 61400-13
- Power quality to IEC 61400-21and MEASNET
- Duration testing to IEC 61400-2
- Safety and function to IEC 61400-2 and IEC 61400-22.
Small- and Mid-Sized Turbines Field-Tested at the NWTC
Small- and mid-sized wind turbine brands validated at the NWTC have included:
- Abundant Renewable Energy
- Atlantic Orient Corporation
- Bergey Windpower
- Endurance Wind Power Inc.
- Entegrity Wind Systems Inc.
- Gaia-Wind Ltd.
- Mariah Resources Inc.
- Southwest Windpower
- Pika Energy
- Xzeres Wind
- Northern Power Systems.
Multimegawatt Turbines Field-Tested at the NWTC
The following multimegawatt wind turbine brands and models are undergoing long-term field research validation at the NWTC:
- GE (ECO110—Alstom Legacy, 3 MW)
- Gamesa (G97, 2 MW)
- GE (GE 1.5 SLE, 1.5 MW)
- Siemens (2.3 MW).
See the National Renewable Energy Laboratory's fact sheet on field-research at the NWTC.
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