IBERDROLA invested over €125 million in the construction of 25 new substations in Spain in 2008. Seven of these installations are in the region of Castilla-La Mancha, five in Murcia, four in Extremadura, three in Valencia, three in Castilla and one in each of the regions of La Rioja, Navarra and the Basque Country
The construction of these new installations, together with the expansion of some existing facilities, enabled IBERDROLA to add around 2,800 megavolt amperes to the system last year, thereby increasing its installed capacity by 4.5%.
In Castilla-Mancha, IBERDROLA has invested €18.8 million in the construction of nine substations with a combined capacity of 330 MVA. These facilities include the Torrijos (145 MVA) and Calzado de Oropesa (45 MVA) substations, both in the province of Toledo.
In Murcia the company has added 615 MVA at a cost of €30.9 million. Here the largest facilities brought on stream are the Totana (450 MVA) and Jumilla (80 MVA) substations.
The new installations in Extremadura, which add 112 MVA, entailed investment of €8.7 million and include the La Coronada (25 MVA) and Casas Don Pedro (25 MVA) substations, both situated in Badajoz province.
In Valencia the Company has invested €16.8 million in facilities with a capacity of 200 MVA, including the El Cantalar substation (100 MVA) in Alicante.
In Castilla y León the Company has built substations which add 80 MVA at a cost of €9.5 million, including the Polígono Industrial de Salas (45 MVA) facility in Burgos.
Meanwhile, eight facilities in Madrid region have been significantly expanded, increasing their capacity by 392 MVA. Investment in this infrastructure totalled €27.1 million. Finally, a total of 85 MVA were added in Navarra, La Rioja and the Basque Country with one new substation built in each of these regions.
Thanks to the addition of these new substations, the expansion of existing
facilities and other investment in power lines and transformer stations,
IBERDROLA achieved the best quality of supply in its history in 2008. The
Company achieved a SAIDI (System Average Interruption Duration Index) of 1.62
hours last year compared with a figure of 1.89 in 2007, an improvement of 14%.
Key facilities for the system
The purpose of substations is to transform energy from high to medium voltage before it reaches the consumer. This energy is then distributed directly to the transformer stations that supply homes.
They play a key role in the electricity distribution system and continued investment is required to create a major substation network to meet rising demand and enhance supply quality.