Wind Generators

limitations

technical information

case studies

In wind electric systems, the rotor is coupled via a gearing or speed control system to a generator, which produces electricity. For small turbines the electricity generated can be used to charge batteries or used directly.

Larger, more sophisticated wind energy converters are currently used to feed power into the grid in developed and developing countries where the wind regime is suitable.

System size

Small turbines intended for battery charging have a turbine diameter of between 0.5 - 5m and a power out put of 0.5 - 2 kW.

Medium sized turbines are used in small independent grids in hybrid with a diesel or PV generator. These turbines have diameters of between 5-30 m and a power output of 10- 250 kW.

 

Large wind turbines are normally grid connected. This category includes diameters of 30-90 m and power outputs 400 kW - 2.5 MW. Leading countries include Germany, Denmark and Netherlands.

In Africa, experience with small wind generators has been isolated and largely driven by donors and missionaries.

Documented projects using wind chargers in the IGAD region include the GTZ Special Energy Project, which supported a local Kenyan company to install 15 kW generators in off grid hospitals. The projects were successful on a technical basis, but infrastructure to support them in the long term was not developed.


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