Transmission network elements

The transmission network consists of 400 kV, 220 kV and 110 kV transmission lines, substations and other high-voltage devices

Transmission lines

Transmission and cable lines interconnect power plants, electricity generators and consumers at the high-voltage level. The ELES Company is responsible for 500 km of transmission lines in the 400 kV transmission network, 260 km of transmission lines in the 220 kV transmission network, and 1,800 km of transmission lines in the 110 kV transmission network.

The electric power system in Slovenia is well connected to the neighbouring electric power systems. Slovenia is connected to Austria with two 400 kV and one 220 kV transmission lines, one 400 kV line and one 220 kV line lead to Italy, and three 400 kV, two 220 kV and three 110 kV transmission lines connect Slovenia to Croatia. There are currently no transmission lines between Hungary and Slovenia; however, a 400 kV Cirkovce–Pince connection is planned.

Overhead power lines lengthOverhead power lines length

Heights
Heights

SpansSpans

Safety warnings and markingsSafety warnings and markings

 

Substations

From the high-voltage substations, transmission lines are connected directly or through transformer stations from the electricity generators to the electric power offtake sites in the consumers’ transmission network. ELES manages and maintains 35 substations with 25 power system transformers with a total power of 5,804.5 MVA. They are located throughout Slovenia, the largest ones being in Beričevo, Podlog, Maribor, Divača, Okroglo and Krško.

TransformationTransformation

Distribution transformer substationDistribution transformer substation

 

RTP Okroglo
RTP Okroglo
RTP Klece
RTP Klece
RTP Divaca
RTP Divaca
RTP Bericevo
RTP Bericevo
RTP Cirkovce
RTP Cirkovce

High-voltage devices

High-voltage devices (circuit breakers, isolating switches, instrument transformers, lightning arresters), mostly installed in the substations, are also a part of the transmission network. They are intended for operation, measurement and monitoring system events, as well as for the protection of high-frequency electric power devices.

High-voltage devices
High-voltage devices
High-voltage devices
High-voltage devices
High-voltage devices
High-voltage devices
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