Asset Management Data

The key data of the Transmission System Equipment are set out below, as they stood on 30/06/2023.

 

Installed Transmission Line Lengths (routing length):

TRANSMISSION LINES (km)

TYPE OF LINES

400 kV

DC 400 kV

150 kV

66 kV

TOTAL

OVERHEAD LINES

3.027,84

106,95

8.863,56

37,54

12.035,9

SUBMARINE CABLES

6

 

1.040,59

72,2

1.118,79

SUBMARINE CABLES (underground part)

13,4

 

30,87

2,8

47,06

UNDERGROUND LINES

31,45

 

378,21

 

409,65

TOTAL

3.078,69

106,95

10.313,23

112,54

13.611,41

 

Transformer and Switching Substations which contain IPTO assets:

SUBSTATIONS WITH IPTO ASSETS

TYPE

TRANSFORMER

SWITCHING

TOTAL SUBSTATION

HVC - SWITCHING (400KV)

19

3

22

STEP-DOWN - SWITCHING SUBSTATION (150/20KV & 66/20KV)

219

4

223

SUBSTATION OF HV CUSTOMERS - MINES

39

 

39

STEP-UP (PRODUCTION STATIONS)

31

1

32

STEP-UP RES PRODUCERS

89

 

89

AC/DC TRANSFORMATION

1

 

1

TOTAL

 

 

406

 

Transformers and Transforming capacity - IPTO Fixed assets:

TRANSFORMERS

TRANSFORMER TYPE

VOLTAGE (kV)

NUMBER OF TRANSFORMERS

MVA CAPACITY

AUTOTRANSFORMERS

400/150/30

64

17.530

AUTOTRANSFORMERS

150/66

1

50

CONVERTER STATION TRANSFORMER

400

1

597

STEP-DOWN TRANSFORMER

150/66

2

50

SVC TRANSFORMER

150/20

3

218

TOTAL   71 18.445

 

Transformers of Users Connected with the Transmission System:

TRANSFORMERS

TYPE

VOLTAGE (kV)

NUMBER OF TRANSFORMERS

MVA CAPACITY

USER

STEP-UP

(CONVENTIONAL PRODUCTION AND HYDROELECTRIC STATIONS)

400

23

8.926

PRODUCERS

150

79

7.215

STEP-UP RES PRODUCER

20

2

7

150

123

7.390

TOTAL   227 23.539  

STEP-DOWN

150/20

454

19.117

HEDNO

66/20

2

50

STEP-DOWN

150/20

5

212

PRODUCERS

STEP-DOWN AUXILIARY

150

22

1.090

STEP-DOWN

150/20

13

650

PPC / MINES

STEP-DOWN

150/MT

90

2.622

HV CUSTOMERS

TOTAL   586 23.742  
GENERAL TOTAL   813 47.280