Asset Management Data | IPTO

Grid Asset Data

The key data of the Transmission System Equipment are set out below, as they stood on 30/06/2026.

Installed Transmission Line Lengths (routing length):
TRANSMISSION LINES (km)
TYPE OF LINES		DC 500 kV	400 kV	DC 400 kV	150 kV	66 kV	TOTAL
OVERHEAD LINES			3.066,91	106,95	8.888,12	37,49	12.099,47
SUBMARINE CABLES		674,24	6,6		1.066,29	72,2	1.819,32
SUBMARINE CABLES (underground part)			13,4		34,43	2,8	50,62
UNDERGROUND LINES		84,45	37,73		429,87		552,05
TOTAL		758,69	3.124,64	106,95	10.418,70	112,49	14.521,46

Transformer and Switching Substations which contain IPTO assets:
SUBSTATIONS WITH IPTO ASSETS
TYPE	TRANSFORMER	SWITCHING	TOTAL SUBSTATION
HVC - SWITCHING (400KV)	20	3	23
STEP-DOWN - SWITCHING SUBSTATION (150/20KV & 66/20KV)	218	5	223
SUBSTATION OF HV CUSTOMERS - MINES	41		41
STEP-UP (PRODUCTION STATIONS)	31	2	33
STEP-UP RES PRODUCERS	131		131
AC/DC TRANSFORMATION	3		3
ENERGY STORAGE	2		2
TOTAL	446	10	456

Transformers and Transforming capacity - IPTO Fixed assets:
TRANSFORMERS
TRANSFORMER TYPE	VOLTAGE (kV)	NUMBER OF TRANSFORMERS	MVA CAPACITY
AUTOTRANSFORMERS	400/150/30	65	17.900
CONVERTER STATION TRANSFORMER	400	5	2.841
STEP-DOWN TRANSFORMER	150/66	0	0
SVC TRANSFORMER	150/20	3	218
TOTAL		73	20.959

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	22	9.279	PRODUCERS
		150	73	6.401,16
STEP-UP RES PRODUCER		400	14	3.590
		150	179	11.853,4
		20	2	7
TOTAL			290	31.130,56
STEP-DOWN		150/20	460	19.738,5	HEDNO
STEP-DOWN		66/20	1	25	HEDNO
STEP-DOWN		150/20	5	212	PRODUCERS
STEP-DOWN AUXILIARY		150	22	1.090,5	PRODUCERS
STEP-DOWN		150/20	10	500	PPC / MINES
STEP-DOWN		150/MV	94	2.779,6	HV CUSTOMERS
STEP-DOWN		150/MV	2	260	STORAGE
TOTAL			594	24.605,6
GENERAL TOTAL			884	55.736,16