ARIA “Libellula” 55kW
Libellula 55kW is a new small size wind turbine, developed
from a well proven dutch technology, with patented energy
conversion system, designed to achieve minimum cost per
kWh of produced energy granting the same reliability of big
size wind turbines.
This result has been achieved using industrial
standard instead of custom components for all
key electrical and mechanical parts.
The 2 blade upwind rotor guarantees high
energy production with very low rated wind
speed thanks to its large diameter and to
variable speed rotation.
The peculiarity of Libellula 55kW is to have one
main generator for energy production and one
auxiliary generator for grid connection; while
mechanical power limitation is obtained by
means of a well proven passive blade pitch
adjustment, electrical power regulation is
carried
out
with
an
unconventional
inverter/rotating-converter combination.
This converter system allows the main
generator to rotate at a variable speed, while
the grid connected generator rotates at
constant speed, as for the conventional stall
regulated wind turbines with asyncronous
generator directly connected to the grid.
Unique in its size-class is the tower, equipped
with internal ladder, that allows simple and safe
maintenance from inside the nacelle - as in big
size turbines - reguardless to weather
conditions.
Simple transportation is granted by the fact that
the complete turbine can be loaded on a single
standard truck, or will fit (with 24 m tower) in a
standard 40’ container.
ARIA s.r.l.
www.aria-srl.it
Sede legale: Via Giuseppe Garibaldi 63, 59100 Prato - P.IVA 02110810971
Capitale Sociale € 25.000,00 i.v. - Registro Imprese di Prato nr. di iscrizione 02110810971
Sede operativa: Via del Mandorlo 30, 59100 Prato - tel. (+39) 0574 550493 fax (+39) 0574 577854 - [email protected]
Ufficio Commerciale: Via Guarini 90, 57121 Livorno - tel (+39) 0586 1862293 / 1862292 fax 0586 069869 - [email protected]
ARIA Libellula 55kW - MAIN TECHNICAL DATA
GENERAL
cut-in wind speed
rated wind speed
cut-out wind speed
extreme wind speed
rated power
grid voltage
3 m/sec.
11 m/sec
25 m/sec.
Ve50 = 52,5 m/sec.
55kW
400V ±10% 3 ph 50Hz
other on request
ROTOR
number of blades
diameter
speed
power regulation
2
18 m
variabile 60 - 95 rpm
passiva : variazione dell’angolo
delle pale
attiva : inverter
GEARBOX
type
ratio
nominal power
2 stages – parallel shafts
1:20
125 kW
MAIN GENERATOR
type
rated power
nominal voltage
frequency
asincronous - 4 poles
55 kW
400 V
variable: 40 - 70 Hz.
number of sections
hub height
material
location ascent
2 or 3
25, 28 or 31 m
hot dip galvanised steel
internal
CONTROL SYSTEM
type
remote diagnostic
n.2 PLC
YES (by SMS with GSM modem)
YAW SYSTEM
type
yaw motors
yaw bearing
active
n.1
crown-bearing; externally geared
SAFETY
1° safety system
activation
2° safety system
activation
passive blade pitch
rotor speed (95rpm)
yawing out of the wind
rotor speed (105rpm)
excessive vibrations
failure anemometer or wind vane
failure in PLC
grid failure
inverter error
yawning system failure
on high speed shaft
for maintenance
manual
rotor blocking system
activation
GRID CONNECTION
converter type
combined: inverter + rotating
asyncronous converter (*)
AC-DC-AC+rotating converter
asincronous 55 kW - 4 poles
400/460 V
50/60 Hz
conversion principle
grid connected generator
nominal voltage
frequency
TOWER
tipo
WEIGHTS
rotor
navicelle including rotor
tower
900 kg
2.900 kg
5.700, 7.800 or 10.800 kg
CERTIFICATION
Certificate number
EN 61400-1
001CU/0 by ICIM SpA
cylindrical pipe 24 , 27 or 30m
(*) patent pending
Power curve
The curve data are valid for standard atmospheric conditions of 15° C air
temperature, 1013 mbar air pressure and 1.225 kg/m3 air density, clean
rotor blades and horizontal undisturbed air flow.
Estimated production
The annual energy production data for different annual mean wind speeds
at hub height are calculated from the power curve data assuming a
Rayleigh wind speed distribution, 100% availability and 10% reduction
due to turbolence, array losses, grid losses, or other external factors
effecting the production.
Powe r curve
Yearly energy production
60
250
50
200
MWh
kW
40
30
150
100
20
50
10
0
0
0
5
10
15
20
25
Wind speed (m/s)
* We reserve tthe rights to change our products characteristics without notice.
aria s.r.l.
Sede legale: Via Giuseppe Garibaldi 63, 59100 Prato
P.IVA 02110810971
Sede operativa: Via del Mandorlo 30, 59100 Prato
tel. (+39) 0574 550493 fax 0574 577854 - [email protected]
Ufficio Commerciale: Via Guarini 90, 57121 Livorno
tel (+39) 0586 1862293/2 fax 0586 069869 - [email protected]
5
5.5
6
6.5
7
Mean wind speed (m/s)
7.5
8
8.5