Wind Farm operation

· Online data (last 10min)

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General Info
· CRES Wind Farm
· Technical specs of the WTs
· Monitoring & control of the wind farm
· Andros: Long term data
· WindRose: Software for wind data analysis
· Installation photos
· Hydrogen Production
· Related articles
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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.

The Greek Centre for Renewable Energy Sources (CRES) has developed its own 3 MW demonstration wind farm, aiming to:

• Test the characteristics of various wind energy exploitation technologies in the case of complex terrain topography
• Contribute in the development of the Greek wind turbine industry
• Demonstrate and disseminate wind energy systems
• Undertake research work for the integration of wind energy technologies with technologies for the production, storage and use of hydrogen (i.e. energy storage), water desalination systems, etc
• Profit on the electricity sales of the farm, contributing to the financial independence of CRES

The wind farm of CRES is situated in Lavrion, SE Attica, adjacent to its older wind turbine Test Station. It operates in a complex terrain site including hills up to 120m high above sea level and coastal regions. The average annual wind speed is measured 6.7m/s and the turbulence intensity approximately 12%. The energy produced from the wind turbines is fed into the interconnected 20kV electricity grid. Two meteorological masts (100m and 40m), are used to measure the reference wind conditions.

There are five wind turbines of various sizes and power control strategies. Three of these wind turbines are commercial and two are prototypes developed in Greece.

The commercial wind turbines are:
• A Enercon E40-500 kW a gearless, synchronous, multipole, variable speed wind turbine.
• A NEG Micon 750kW stall regulated, constant speed with 2 asynchronous generators wind turbine.
• A Vestas V47-660 kW pitch regulated, constant speed, with one asynchronous generator wind turbine.

The two prototype wind turbines, which have been developed in Greece and manufactered by PYRKAL SA, under the tech. development of Prof. N. Athanasiadis (mechanical part) and Dr. K. Michailidis (electrical-electronic part) are:
OA-500 kW a stall regulated wind turbine, using an advanced variable speed technique (OPSC®: Opti Power Speed Control) and an active line inverter
OA-600 kW, an otherwise identical to the above machine

The three commercial wind turbines have been erected and their commissioning has started in February 2001. The erection and commissioning of the two Greek prototypes will be completed in the summer of 2003.

With an annual mean wind speed of 6.7m/sec at the site, it is expected that the five wind turbines will produce 7.6 GWh of electricity per year, which is equivalent to 2000 TOE and 6,000 tons of CO2. The total budget for the project was 4.12 M€ and was wholly financed by the Operational Programme for Energy of the Greek Ministry of Development. The annual income from electricity sales amounts to 440 k€.

All the wind turbines are equipped with fibre optics connections, in order to transmit accurately dozen of signals, permitting to evaluate the wind turbine performance. Each wind turbine's operational data are recorded in a common way, using a home-developed software that communicates with the turbines, using their specific protocol. The monitoring software operates continuously, storing every sec all the data (wind speeds, power, voltages, etc). Moreover, a) it analyses the previously recorded data, b) it updates a web site and c) communicates results with SMS messages and WAP.
The system is designed not only for the administrators, but also for the simple users, seeking general information about the Wind farm operation. The administrators receive detailed information by SMS messages and e-mail and have full access to the operation database.