Basic data of the transmission system for year 2022

Overhead transmission line – line lenghts

Voltage
(kV)
SingleDoubleVSVTotalDeployed lenght
(km)
4001 373,533472,85818,6781 865,0692 356,605
220408,080140,1880,000548,268688,456
1100,25421,09618,67840,02879,802
Sum total1 781,867634,14237,3562 454,9713 124,863

Overhead transmission line – number of towers

Voltage (kV)SingleDoubleVSVTotal
4003 9581 480645 502
220124545401 699
110181082
Sum total5 2042015647 283

Electrical substations

Voltage (kV)Number of substationsNumber of fields
40020147
220531
110124
Sum total26202

Development (Trend) of substations quantity

Network transformers

Voltage ratio (kV/kV)Number of transformersTotal power (Gross power) (MVA)
400/22031 400
400/110319 230
220/11061 200
Sum total4011 830

Development (Trend) of transformers quantity

Development of transformation capacity (MVA)

Protection and automatic devices

Voltage (kV)Number of digital protection devicesNumber of electromechanical protection devicesNumber of electronic protection devicesNumber of hybrid protection devices
4006810262
2201273110
110180600
3532300
3359000
227200
10.567630
6.39000
0.417000
Sceleton37040
Sum total1 21620442

Number of protection and automatic devices