Electric power is extremely important for the welfare of modern societies because it allows us to use a wide range of appliances that need it to operate. In fact we rely on electricity to cover our needs in an increasing manner that concerns all sectors of the economy. In the household sector, for example, electricity is dominant with applications on lighting, convenience, and cooking equipment, and often heating. In the industrial sector, pneumatic and thermal devices have been displaced by electricity-driven machinery. Finally, the transport sector sees an increased use of electric private vehicles and other electric means of public transportation such as trains and buses, mostly due to reasons related to urban environmental quality. Power is generated at power plants, then transmitted via high-voltage power lines to the areas where it will be distributed to consumers (industrial, municipal, residential, etc.).