ecn wind turbine test site wieringermeer
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www.ecn.nl
ECN Wind Turbine Test Site Wieringermeer
Wind turbines owned by test site
Number 5
Type Nordex N80
Rotor diameter 80 m
Hub height 80 m
Rated power 2,5 MW
Erected in March 2004
Distance 300 m
Prototype locations
Number 4
Rotor diameter max. 120 m (presently permitted value)
Hub height max. 100 m (presently permitted value)
Rated power up to 6 MW
Distance 400 m
Electrical infrastructure
Grid connection at 10 kV level
Electrical grid capacity 36 MVA
Transformer station 10kV/50kV
Rated power per prototype max. 6 MW
Meteo towers
Number 3
Tower heights 108, 108 and 100 m
Measurement heights various, at 25 to 108 m
Measured parameters wind speed •wind direction •air temperature •air pressure •
Measurement infrastructure
Signal cables Glass fi ber multiduct system
Data acquisition ECN DANTE systems
Evaluation in Control Center at the site •at ECN via a direct glass fi ber link •
Control Center
Offi ces for manufacturers
Meeting room max. 10 persons
Computer room for data evaluation
Miscellaneous workshop and dressing room
Scaled Wind Farm
WInd turbines
Number 10
Type AIRCON P10
Rotor diameter 7,6 m
Hub height 7,5 m
Rated power 9,8 kW
Erected in March 2008
Meteo masts
Number of small masts 10
Measurement height 7,5 m
Number of larger masts 4
Measurement heights 3,7 m; 7,5 m; 11,3 m and 18,9 m
Site specifi cationsECN Wind Energy Facilities BV
Schervenweg 35a
1771 RT Wieringerwerf
Tel : +31 224 56 40 25
Fax : +31 224 56 82 14
Mob. : +31 6 20 30 20 79
Contact: Wim Stam
OrganizationThe test site is managed by ECN Wind Energy Facilities BV, a 100% ECN subsidiary. Many neighboring farmers participate in the project and receive fi nancial benefi ts. The objective of this company on the one hand is to facilitate the measurement and development programs of ECN and on the other hand to maintain fi nancial integrity of the test site operation.
10 kV cables
Meteo towers
50 kV station
Nordex N80
wind turbines
Control
Center
Prototype
locations
Kreileroord
Scaled Wind Farm
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19 m met. masts
7,5 m met. mastsAircon turbinesW
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The Vestas NM 92 prototype and the 50kV/36MVA transformer station. This turbine was installed in 2003 and removed in 2007.
Wind turbine type DD115 GE 2,5 GE 2,5 Siemens 3,6Manufacturer Darwind General Electric General Electric Siemens Wind Power
Rotor diameter 115 m 100 m 100 m 107 m
Hub height 100 m 85 m 100 m 80 m
Installed power 4,6 MW 2,5 MW 2,5 MW 3,5 MW
(To be) installed in 2009 2004 2007 2005
Wind turbines owned by the test siteThe fi ve Nordex N80 turbines were installed early 2004 and produce about 30.000.000 kWh per year. The income of this green electricity gives a solid base for the fi nancial exploitation of the site. The turbines are used by ECN for its R&D programs. These programs cannot be executed in commercial farms. Wind farm operators are reluctant to facilitate research programs that might confl ict with maximum energy production. ECN investigates aspects like operation and maintenance strategies; wake effects, and condition monitoring. Other important activities are the development of improved wind farm control strategies and new advanced measurement techniques.
Measurement infrastructureAn advanced glass fi bre based data acquisition system supports manufacturers in testing, optimisation and cer-tifi cation of their prototype turbines. This system is called DANTE and was developed by ECN. It aims at high reliabi-lity, is independent from electro magnetic interference and
From 2003 ECN has expanded its wind turbine facilities with a wind turbine test site in the municipality of Wieringermeer. The site is located just south of the village Kreileroord, at about 30 km distance from ECN’s main offi ces in Petten. This unique facility is a combination of a wind farm, prototype test locations and a scaled windfarm. The wind farm - consisting of fi ve Nordex N80 wind turbines - enables ECN to perform wind farm specifi c research and development programs. The site also comprises four prototype locations. These locations enable manufacturers to test, optimize and certify prototypes together with ECN. Supporting facilities are three meteo towers, a 36 MVA grid connection, data collection equipment and a test site control center. The test site also accommodates a unique facility, which allows ECN to perform accurate wind fi eld measurements in a small scale wind farm. This Scaled Wind Farm - consisting of ten Aircon P10 turbines plus fi fteen measurement towers - also allows for the development and testing of wind farm specifi c control strategies. The site has a favorable wind climate: the average wind speed at 100 m height is 8,3 m/s.
PrototypesA wind turbine manufacturer can lease the location for a period of typical four to fi ve years. He pays a yearly lease fee and receives in return the benefi ts of the produced electricity. The test site can acco mmodate prototypes with installed electrical powers up to 6 MW each. The test site has an environmental permit for wind turbines
Five Nordex N80 wind turbines owned by the test site
Scaled Wind Farm
BackgroundFor the development of large (offshore) wind farms it is es-sential to understand the detailed wind fi eld in and around the farm. The wake effect of individual turbines have a strong infl uence on energy production and mechanical loads of other turbines. Understanding these infl uences is necessary to carry out aerodynamic research programs and to develop optimised wind farm control strategies. Reliable computer models are required that predict the steady and unsteady wind fl ows in wind farms and the re-sponse of individual wind turbines. For the development of these models adequate measurements are crucial. These measurements are not available yet. The main reason for that is that accurate fl ow determination requires many metrological towers. For full scale measurement this would be far too expensive. Therefore accurate wind fl ow mea-surements in wind farms are lacking. This has hindered research on wind farm aerodynamics and control.
The value of wind tunnel data as an alternative for full scale measurements is limited due to scaling effects. ECN has overcome these problems by building a scaled wind farm facility. Its scale is large enough to alleviate the dominant scaling effects and the scale is suffi ciently small to permit the building of suffi cient meteorological masts.
Scaled Wind Farm layoutThe scaled farm consists of ten permanent magnet, direct drive, pitch controlled wind turbines, to which hardware and software ECN has full access. The turbines have 10 kW rated power, a rotor diameter of 7.6 m and a hub height
of 7.5 m. The scaled farm has been designed in a way that allows ECN to perform experiments without any risk for the environment as well as for the turbines themselves. Inside and around the wind farm a network of fourteen meteoro-logical masts has been installed, which measure the wind velocity fi eld from 3.6 m to 19 m height. This covers the rotor area and up to one rotor diameter above the rotor. The alignment of turbines and measurement masts within the wind farm permits to measure at the same time single, double, triple and quadruple wakes. This is supported by simultaneously measuring the external conditions with the three nearby 108 m meteorological masts. The unusually densely spaced wind measurements capture the com-plete wind fi eld. This gives valuable additional information compared to the usual measurement of the wind speed at a single location.
Benefi tsThis worldwide unique research facility gives further insights in the fi eld of wind farm aerodynamics, wake interaction and wind farm control. The high quality data are used for the development and validation of wind farm aero-dynamic models and wind farm control strategies. This will allow operating a wind farm at maximum effi ciency while guaranteeing at the same time a maximum in reliability and a minimum in mechanical and electrical loads. ECN not only uses the scaled farm to improve its own knowledge but also to initiate other collaborations with national and international partners, coming from research institutes, universities and wind turbine manufactures.
with a maximum hub height of 100 m and a rotor diameter up to 120 m. The route to obtain a building permit is rela-tively short. Usually the civil activities at the site can start within three months after the lease contract is concluded. The 10kV grid connection cables are already available at the prototype locations.
is capable of measuring almost every wind turbine related signal. Three meteo towers allow for IEC- and MEASNET- compatible measurements. ECN is accre dited to perform measurements of mechanical loads, power performance and acoustic noise production. ECN is specialized in custom made measurement campaigns.