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Basic data

Basic data of the transmission system for year 2018

Overhead transmission line - line lenghts

Voltage
(kV)		 Lenght of line rout (km) Deployed lenght
(km)
Single Double VSV Total
400 1 341,470 379,728 18,678 1 739,876 2 138,282
220 507,425 141,113 0,000 648,538 825,886
110 0,254 21,093 18,678 40,025 79,796
Sum total 1 849,149 541,934 37,356 2 428,439 3 007,729

Overhead transmission line - number of towers

Voltage
(kV)		 Single Double VSV Total
400 3 877 1 188 64 5 129
220 1 572 456 0 2 028
110 1 81 0 82
Sum total 5 450 1 725 64 7 239

Electrical substations

Voltage
(kV)		 Number of substations Number of fields
400 19 136
220 6 42
110 1 24
Sum total 26 202

Development (Trend) of substations quantity

Network transformers

Voltage ratio
(kV/kV)		 Number of transformers Total power (Gross power)
(MVA)
400/220 3 1 400
400/110 29 8 730
220/110 8 1 600
Sum total 40 11 730

Development (Trend) of transformers quantity  

Development of transformation capacity (MVA)

Protection and automatic devices

Voltage
(kV)		 Number of digital protection devices Number of electromechanical protection devices Number of electronic protection devices Number of hybrid protection devices
400 650 4 31 2
220 149 6 12 0
110 176 7 0 0
35 32 3 0 0
33 55 0 0 0
22 7 17 0 0
10.5 59 22 3 0
6.3 9 0 0 0
0.4 16 0 0 0
Sceleton 37 0 4 0
Sum total 1 190 59 50 2

Number of protection and automatic devices
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