Wind energy is one of many future technologies in which Spain plays an important role. Spain is the second largest wind energy producer in Europe after Germany, with production levels very similar the United States, is also among the three countries that produce more energy in the world in this field. This is because a stable regulatory framework, a better knowledge of resources, and better technology, which has resulted in a considerable reduction of the initial investment, maintenance and exploitation. ” In 2006, Spain had installed wind energy capacity of 11,615 MW, making it the second country in the world terms of production, along with the U.S., only behind Germany. In 2005, the Government of Spain approved a new national law with the aim of reaching 20,000 MW of production in 2012.On 8 November 2009 was recorded highs of wind energy production: 11,620 MW of instantaneous power, wind energy production 11,429 MWh and 251,543 MWh of hourly wind production daily, 44.9 of the electricity demand of the day. The previous maximum instantaneous power, 11,203 MW occurred on 5 March this year, while production hourly and daily wind took place on 22 January 2009, with 11,074 MWh and 234,059 MWh, respectively. On January 14, 2010 at 1:50 hours, I get to get 11,653 MWh. This is a power greater than that produced by the seven nuclear plants in Spain totaling 8 reactors and which together generate 7742.32 MW.