In 2002 the enlargement works of Madrid's Barajas airport began, the new T-4 terminal and two new runways. Said infrastructures were affected by the fact that a part of the 400 kV line (double circuit San Sebastián de los Reyes-Loeches-Morata).

Red Eléctrica, since its founding, has sought to continuously improve the availability of the electricity transmission facilities.

The electricity interconnection between the Spanish peninsula and the Balearic Islands is a project which is key to ensuring and improving the reliability of the electricity supply of the Balearic system given its unique nature.