Number of plants - Terna

The number of Terna plants at December 31, 2009, compared with the situation at December 31, 2008, is reported below:

 Terna Dec. 31, 2009Terna Dec. 31, 2008Change Jan.-Dec., 2009
Stations no. 383 no. 371 +no. 12
Transformers no. 620 121,501 MVA no. 610 118,539 MVA +no. 10 +2,962 MVA
Bays no. 4,537 no. 4,475 +no. 62
Lines 39,819 km 39,456 km +363 km
3-phase power lines no. 2,167 44,560 km no. 2,145 44,172 km +no. 22 +388 km

Stations

The main station-related changes are summarised below:

  1. whole plants:
    • activation of 3 new transformation stations: Cedegolo Sud (went into service with 2 bays x 220 kV and 3 bays x 132 kV), Abbadia (went into service with 2 bays x 220 kV and 2 bays x 132 kV), and Napoli Levante (armoured, went into service with 4 bays x 220 kV);
    • activation of 8 new delivery stations: Mogorella (4 bays x 220 kV), Tirano (3 bays x 220 kV), Faeto (4 bays x 150 kV), Rotello, Feo, Sicignano and Regalbuto (3 bays x 150 kV each), and INNSE (1 bay x 132 kV).
  2. existing plants:
    • activation of the new 380 kV section at the Casellina station (went into service with 3 line bays and 1 parallel bay);
    • activation of 2 new 150 kV sections respectively at the Santa Sofia (went into service with 1 machine bay, 1 power factor correction bay and 1 parallel bay) and Uvini stations (went into service with 2 line bays and 1 machine bay);
    • activation of bays for the new SA.PE.I. link at the stations of Latina and Fiumesanto (a total of 4 bays x 380 kV);
    • activation of 17 new line bays respectively at the stations of Scandale and Priolo (1 x 380 kV each), Marghera 3 and Avise (2 x 220 kV each), Verampio, Pianezza and Bussolengo San Salvar (1 x 220 kV each), Roma Est, Accadia, Fulgatore and Tula (1 x 150 kV each), Stazzona (2 x 132 kV), Fusina 2 and Calenzano (1 x 132 kV);
    • activation of 9 new machine and/or power factor correction bays at the stations of Casanova (1 x 380 kV and 2 x 132 kV), Brindisi Pignicelle, Andria and Santa Sofia (1 x 380 kV each), Verampio and Partinico (1 x 220 kV each), and Codrongianos (1 x 150 kV);
    • activation of 4 new parallel and/or connector bays at the stations of Pallanzeno and Verampio (1 x 220 kV each), La Spezia and Cedegolo (1 x 132 kV each);
    • deactivation and/or demolition of 18 bays at the stations of La Spezia (1 x 380 kV), Santa Massenza (5 x 220 kV), Codrongianos (1 x 150 kV), Carpi Fossoli (5 x 132 kV), Sud Ovest (3 x 132 kV), Pian Rocca (1 x 132 kV), Taloro and Uvini (1 x 70 kV each).

Transformers

An additional 10 transformers went into operation compared with December 31, 2008, corresponding to a 2,962 MVA increase in transformation capacity. Specifically, there were 6 new 380 kV single-phase machines introduced at the Latina and Fiumesanto switching stations, operations began at the first pole of the SA.PE.I. connection, and 3 more transformers on the 380 kV line at the Brindisi Pignicelle, Santa Sofia and Casanova stations were added.

Long distance power lines

The total length of long distance three-phase power lines increased by 388 km compared with December 31, 2008 and the total length of lines increased by 363 km. Specifically, 490.9 km of lines were added after the first pole of the 500 kV d.c. SA.PE.I. underwater cable between the stations of Latina and Fiumesanto became operational, including land and seabased lines, while 130.4 km of lines, corresponding to 5 three-phase power lines, were taken out of service after operational lines were decommissioned, deactivated and/or demolished.