Number of plants – Terna

The number of plants belonging to the company Terna S.p.A. at 31 December 2012, compared with the situation at 31 December 2011, is shown in the following table:

31.12.2012 TERNA 31.12.2011 TERNA VARIATION01 ÷ 12.2012
Stations 449 435 14
Transformers 648 636 12
136,489 MVA 126,303 MVA 10,187 MVA
Bays 4,964 4,846 118
Lines 40,931 km 41,121 km - 190 km
3-phase power lines 2,347 2,312 35
45,904 km 46,069 km - 165 km
Km and MVA are calculated to 3 decimal places and rounded off to the unit.

Stations

With regard to the stations, the following variations are noted:

1. of entire plants:

  • activation of 3 new transformer stations: Aliano (5 380 kV bays and 6 150 kV bays), Castellaneta (4 380 kV bays and 6 150 kV bays) and Erchie (2 380 kV bays and 2 150 kV bays);
  • activation of 12 new switching stations: Pellerina and Villa Castelli (4 220 kV bays each), Collarmele and Aprilia 150 (6 150 kV bays each), Stornara (4 150 kV bays), Taverna, Terranova, Monte Narbone, Francavilla and Ucrìa (3 150 kV bays each), Melissa and Sortino (2 150 kV bays each);
  • activation in provisional configuration (and therefore not counted as a station) of the plant in Tuscania (1 380 kV bay and 1 150 kV bay);
  • disposal of the station in Monfalcone Industrial Zone (3 220 kV bays);
  • declassification of the Este station from 220 kV to 132 kV.

2. of existing plants:

  • activation of the new 220 kV SF6 section in the Piossasco station (4 bays);
  • activation of the new 150 kV in air section of the Piossasco station (5 bays);
  • activation of the new 150 kV in air sections in the stations of Benevento II and Brindisi Sud (2 bays each);
  • activation of the new 132 kV SF6 section in the Piossasco station (6 bays);
  • activation of the new 132 kV SF6 section of the San Columbano station (4 bays);
  • deactivation of the 220 kV section in the Feroleto station (2 bays);
  • deactivation of the 70 kV section in the Taloro station (2 bays);
  • activation of 35 new line bays in the stations of Foggia PST (4 380 kV bays), Villanova PST (2 380 kV bays), Villanova (1 380 kV bay), S. Giacomo 380 (2 220 kV bays), Milano Porta Volta (3 220 kV bays), Ponte and Milano Gadio (1 220 kV bay each), Montalto and Deliceto (2 150 kV bays each), Rotello, Bisaccia 380, Brindisi Pignicelle, Castelnuovo, Scandale, Maida, Ginestra, Foggia, Feroleto, Patria, S. Sofia (1 150 kV bay each), Carpi Fossoli (3 132 kV bays), Somplago, S. Alberto and Alfonsine (1 132 kV bay each);
  • activation of 25 new machine and/or power factor correction bays in the stations of Brindisi Sud and Deliceto (2 380 kV bays and 2 150 kV bays), Villanova PST and Foggia PST (2 380 kV bays each), Villanova and Benevento II (1 380 kV bay and 1 150 kV bay each), Piossasco (1 380 kV bay and 1 132 kV bay), Montalto, Aurelia, Scandale, S. Sofia and Feroleto (1 380 kV bay each), Camporosso and Maddaloni (1 220 kV bay each);
  • activation of 2 new parallel bays in the stations of Lizzana and Alfonsine (1 132 kV bay each);
  • deactivation demolition and/or transfer to third parties of 28 bays in the stations of Piossasco (4 220 kV bays and 4 132 kV bays), Camporosso (3 220 kV bays), Cardano (1 220 kV bay), ex-Sezionamento Collarmele (5 150 kV bays), Fratta and Feroleto (1 150 kV bay each), Cedegolo (3 132 kV bays), Martinetto, Stura, S. Rocco al Porto, Carpi Sud, Suvereto SC and Ferrara SC (1 132 kV bay each).

These variations must be reduced by 2 bays, deleted following technical verification of the values previously cited.

Transformers

With regard to transformers, the following variations are noted:

  • activation of 4 new 380 kV phase shifting transformers of 1,800 MVA in the plants of Villanova PST and Foggia PST (2 PST each);
  • activation of 6 new 380 / 150 kV auto-transformers of 250 MVA in the stations of Villanova and Benevento II (1 ATR each), Brindisi Sud and Deliceto (2 ATR each);
  • activation of 1 new 380 / 132 kV auto-transformer of 250 MVA in Piossasco station;
  • activation of 4 new 380 / 150 kV auto-transformers of 250 MVA, at the same time as the entry into service of the new stations of Aliano (2 ATR), Castellaneta and Erchie (1 ATR each);
  • activation of 1 new 380 / 150 kV auto-transformer of 250 MVA and 1 new 150 / 20 kV transformer of 40 MVA, at the same time as the entry into service of the Tuscania plant;
  • activation of 1 new 220 / 20 kV transformer of 63 MVA in the Maddaloni station;
  • strengthening of 3 220 / 132 kV auto-transformers in the stations of Pianezza and Cardano (from 160 to 250 MVA) and Chatillon (from 100 to 160 MVA);
  • transfer to Edison of 2 132 / 10 kV transformers of 70 MVA in the Cedegolo station;
  • transfer to RTR of 2 132 / 20 kV machines of 8 and 16 MVA respectively, at the same time as the transfer of the plants at Suvereto SC and Ferrara SC;
  • disposal of 1 220 / 150 kV auto-transformer of 160 MVA in the Feroleto station;
  • disposal of 1 150 / 70 kV transformer of 32.5 MVA in the Taloro station;

Long-distance power lines

With regard to long-distance power lines, the following variations are noted:

  • entry into service of 9 new lines for a total of 28.2 km; Casoria - Fratta 220 kV (6.6 km); Pellerina - Torino Ovest 220 kV (4.6 km), Milano Gadio - Milano Porta Volta 220 kV (1.6 km), Pellerina - Levanna 220 kV (0.7 km), Pellerina - Martinetto 220 kV (0.6 km), Bussi - Popoli cp 150 kV (3.7 km), Carpi Sud - Carpi Nord 132 kV (9.9 km), Brunico cp - Brunico c.le Hydros 132 kV (0.3 km), Somplago - SIOT Cavazzo 132 kV (0.1 km);
  • implementation of 6 short connections between adjacent plants for a total of 1.2 km, of which: 2 are of 220 kV (0.8 km) and 4 are of 132 kV (0.5 km);
  • implementation of 22 incoming-outgoing derivations on as many lines in operation with an overall increase to as many three-phase power lines and to + 20.5 km, of which: 2 are of 380 kV connections (+ 0.2 km), 2 are of 220 kV connections (+ 0.1 km), 9 are of 150 kV connections (+ 7.1 km) and 9 are of 132 kV connections (+ 13.0 km);
  • disposal of 4 lines in operation for a total of 23.1 km, of which: 3 are of 220 kV (19.1 km) and 1 is of 132 kV (4.0 km);
  • acquisition by Terna Rete Italia S.r.l., in view of authorisation requirements, of 5 line sections for a total of 4.3 km, of which: 4 are of 150 kV (2.4 km) and 1 is of 132 kV (1.9 km);
  • partial reorganisation of the 132 kV grid north of Milan with an overall increase of 1 three-phase power line, and at the same time a 122.3 km reduction in three-phase circuits in operation;
  • implementation of modifications, rigid derivations and/or changes in the line with a total reduction of 1 three-phase power line and 58.4 km, of which: + 1.4 km is of 380 kV, - 2 three-phase power lines and - 66.5 km is of 220 kV, + 2 three-phase power lines and + 20.1 km is of 150 kV, - 1 three-phase power line and - 13.4 km is of 132 kV.

These variations must be reduced by 3 three-phase circuits and around 15.4 km of the same, deleted following technical verification of the values previously cited.