Wind energy is generated from the strength of the wind and through wind turbines. In them, the wind is captured by blades attached to a turbine that drives an electric generator. It is an abundant, renewable and clean energy.
Although it seems new, wind energy has been used for over 3000 years. Previously it was commonly used by windmills, which served to pump or drain water, grind grain and other activities that depended on mechanical strength. Over time, the force of winds started being used not only to generate mechanical force, but also electricity. With technological advancement, wind turbines have become able to generate a greater amount of energy and this lead to the installation of the first wind farms.
Wind farm owned by Casa dos Ventos in Caetés - PE
How does it work?
A wind system can be used in two applications:
- Isolated systems, which store energy in batteries, commonly used in residential applications and in a smaller scale
- Integrated network systems that deliver energy directly to the electrical grid, usually on a larger scale and for commercial purposes
There is also the offshore application that is a wind energy system installed at sea, which takes advantage of the winds off the coast and use transmission lines to deliver energy to the mainland.
Wind Power in Brazil
In Brazil, the first wind turbine was installed in Fernando de Noronha, Pernambuco, in 1992. At the time, the generation of electricity was equivalent to 10% of the energy generated and consumed on the island. This would save the consumption of 70,000 liters of diesel fuel per year.
In February 2017, Brazil reached 10.8 GW of wind power in operation, representing 7.1% of the Brazilian energy matrix and became the 9th country with the largest wind energy generation in the world.
With projects currently under construction, it is estimated that by 2020 the country will have 600 wind farms in operation, of which about 30% were developed by Casa dos Ventos. These projects will have an installed capacity of 17.9 GW, and will represent around 10% of all energy produced in Brazil.
The growth of wind power in Brazil has been significant, but if we analyze its potential, we still have a lot to explore. According to studies by the Agência Nacional de Energia Eólica (ANEEL), Brazil has the potential of 300 GW of wind generation, which corresponds to 2.2 times the Brazilian energy matrix.