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WIND FIELD (POWER 26.65 MW)

Plant data

Features

  • Location:  Alberona (FG)
  • Coord. UTM (Zone 33S):
    517,480 E – 4,591,220 N
  • Area of intervention: about 9 ha
  • Construction period: September 2006 – December 2008
  • Commissioning and start-up: 2009
  • Assignment: High monitoring to the implementation
  • Total cost: 39,800,000.00 €

Technical Data

  • Wind turbine generators
    • Rated power: 2,050 kW
    • Rotor diameter: 82 m
    • Hub height: 85 m
    • Number of turbines: 13
    • Total installed power: 25.65 MW
    • Average annual production capacity:
      50÷60 GWh
  • Rotors
    • Type: Upwind rotor with blade active control
    • Direction of rotation: clockwise
    • Rotation speed: 6÷17.5 rpm
    • Number of glades: 3
    • Described area: 5,281 m²
    • Blade adjustment: independent control system for each blade with emergency power, holding brake rotor, rotor block
  • Transmission with generator
    • Generator: direct drive ring
    • Grid feeding: inverter
    • Wind speed retainer: 28÷34 m/s with storm control

(S0023)

Plant description

The plant for the production of energy from renewable sources (wind energy) was carried out in the Municipality of Alberona, in the locality of Toppo Seggio – Coppe di Mezzanelle, at an altitude ranging between 280 and 400 m above sea level, along the ridge of the hills. The plant consists of a total of 13 wind turbines with a rated power of 2.05 MW each, for a total nominal power of 26.65 MW.
The installed wind turbines are all Enercon brand, model E82 and are therefore characterized by a nominal power  of 2,050 kW and variable rotation speed from 6 to 17.5 rpm (for smaller or larger values of wind speed the generator stops by an automatic device to avoid mechanical damage). The rotor has a diameter of 82 m, it’s mounted on a hub of about 85 m high and each wind turbine is equipped with 3 blades fiberglass (with embedded lightning rod), each of which is equipped with an adjustment system with independent emergency power, holding brake rotor and the rotor block. The engine type is direct drive synchronous ring and the noise level of each wind turbine reaches about 41-45 dB (A) at a distance of 300 m. Each turbine has a floor space of a few tens of square meters since, after the construction phase in which the bulk medium was equal to 800 m2, all the surrounding areas have been subjected to a renaturation, in order to minimize the impact done on the ground. For the same purpose, only existing traffic routes have been used, consolidating with ecological material stabilized very similar to the natural ground parts that needed surgery. The foundations of the wind turbines are plinth of the circular section direct type with a diameter of 14.7 m.
The energy produced is piped through underground electrical cables, to the point of delivery Enel located within the same wind farm.