Wind energy, or wind power, is caused by pressure differences across the Earth's surface, due to solar radiation being greater in equatorial zones than in polar zones. Wind has had multiple uses throughout history, such as grinding cereals, lifting water in wells, and as a propulsive force for sailing ships. Currently, wind energy is seen as one of the most promising renewable energy sources, characterized as a mature technology that can contribute to the security of energy supply and the sustainability of the electrical system. In Portugal, there are many suitable locations for harnessing wind energy throughout the territory, both in coastal areas that take advantage of coastal winds, which blow more strongly at the end of the day and in some summer months, and in the mountainous areas of the interior where the winds have continental characteristics and are more intense in winter. Generally, in all these locations, wind speeds very often exceed 5 m/s, a value from which wind turbines usually begin producing electricity.