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AUTONOMOUS WIND POWER GENERATORS OF LOW CAPACITY (AVG)

Design and technological characteristics
     

CONCORD TDB carries out the design, manufacture, supply, construction, installation and maintenance of wind power generators with a capacity of 10-30 kW and autonomous power supply complexes on their basis.

AVG are designed to convert wind energy into electrical energy of alternating (or direct) current and provide electricity to a separate consumer. Their work for an autonomous consumer is possible both independently and in combination with diesel generators, batteries, solar panels and other sources of electricity.

Potential consumers of AVG are residents of country houses, owners of small enterprises, farms, utilities, etc.

The capacity growth is possible by combining several AVG into a single power plant.

AVG are equipped with a microprocessor control system, lightning protection systems, safety and emergency brake. The regulation and maintenance of a stable rotor speed is carried out by changing the angle of attack of the blades.

 
     
 

Brochure AVG-30 Specifications and configuration options. 
[PDF - 1,90MB]

Design features of AVG

  • Gearless circuit with the use of low-speed synchronous generators.
  • Horizontal-axial scheme with three blades installed stationary on the rotor.
  • Automation and safety systems control the orientation of AVG relative to the wind direction, control the speed and load in the process of generating electricity.
  • Support (tower) - metal, conical shape, free-standing.
  • The structure is supplied with lightning protection.
  • Maximum adapted for conditions with low wind potential;
  • Relatively low cost due to domestic production.

Main characteristics of AVG-10/20/30

Parameter Value
Model AVG-10 | AVG-20 | AVG-30
Type horizontal-axis
Scheme multiplier
Consumer load connection autonomous, using inverter to the required power
Power, kW, nominal 10 | 20 | 30
Control system automatic, microcontroller
Wind orientation system active with electromechanical drive
Height to the rotor axis, m 13,5 | 15,0 | 18,0
Wind speed, m/s:
- activation 
- nominal 
- deactivation 
- maximum permissible

3,0
8,6 | 9,0 | 10,3
25,0
50,0
Generated electricity:  
- rated output line voltage, V
- nominal frequency of output voltage, Hz
- power adjustment
400
50
change of the angle of attack of the blades
Nacelle:  
- constructive execution power frame with a multiplier and a generator installed on it + fairing with side access hatches
- material of the power frame steel
- fairing material plastic
Multiplier:  
- type
cylindrical
Generator:  
- type synchronous
- nominal frequency of rotation, rpm 1500
- connection of shafts of multiplier and generator elastic sleeve-finger coupling with brake drum
Rotor:  
- diameter, m 10 | 12 | 14,5
- nominal frequency of rotation, rpm 125 | 100 | 77,3
- number of blades, pcs. 3
- linear speed of the end of the blade, m/s 65,4 | 62,8 | 58,7
- aerodynamic profile of the blade NACA 63XX
- blade material fiberglass
Rotary support axle mounted in a housing on two radial roller bearings and one thrust ball bearing
Blade rotation drive electromechanical: stepper electromotor-gearbox-rail mechanism-separator coupling-blade shaft thrust
Electrical equipment cabinet of the nacelle tight design, located in the nacelle
Control system sensors turn angle sensor, cable twist sensor, wind speed sensor, wind direction sensor, generator speed sensor, rotor speed sensor, blade turn actuator stem end position sensors, generator temperature sensor, structure vibration limit sensor
The main braking system of the rotor aerodynamic - by moving the blades to the vane position by driving the blades according to commands of the control system
Emergency rotor braking system aerodynamic - by moving the blades to the vane position by a spring mechanism with one central spring
Limitation of the speed of the emergency removal of the blades to the vane position hydraulic damper
Security systems rotor hand brake of shoe type with the drive at the bottom of the support, rotor stopper, nacelle stopper, lightning protection, safety cable with self-locking carbine
Cable network output from the nacelle through the current collector with the descent along the support stand
Support:  
- material steel
- constructive execution truss, three-edge
- height, mm 12900 | 14300 | 17220
Weight, kg, not more than:  
- nacelles with blades 980 | 1250 | 1500
- supports 2900 | 4000 | 5300
Service life, years, not less 20

Note: Data on wind speed are given for the height of the rotor axis.

Dependence of the generated electrical power of AVG on the wind speed at the height of the rotor axis.

 
Dependence of the annual electricity generation of AVG on the average annual wind speed at a height of 10 m.

 

The data of the generated power and annual electricity generation are given for normal operating conditions T = 288°K, P=101.5 kPa (T=15°C, P=760 mmHg)