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INTRODUCTION

Global energy demand continues to increase, with major developing countries acting as the main driving force behind such rise. However, the world energy balance is still highly dependent on the finite source of fossil fuels, which is considered to be the major responsible for atmosphere pollution in big cities. Furthermore, the long term consequences of the use of these non-renewable fuel sources are still unknown. Global warming, for example, is pointed out to be one of its most undesirable effects.

In this scenario, the need to diversify the energy matrix using more renewable energy sources has become urgent. One of the most triumphant clean energy sources that has been developed in the last years is wind power. The installed wind power capacity is increasing significantly worldwide as well as its importance to the energy matrix of several countries.

Such growth takes place due to a number of advantages of the wind power when compared to other