Elektro Ljubljana operates and manages the largest energy distribution network in Slovenia, and is also the owner of the electric power infrastructure.
At home, at work, or even when we’re outside, these days electricity is an indispensable resource that all users rely on. Elektro Ljubljana accordingly offers you a broad range of solutions, provided with the very best in professionalism.
Since users are always our number one priority, we never stop providing all information necessary.
Knowledge, experience, and constant R&D help us ensure a sustainable distribution system for safe, reliable, and high-quality electric energy supply.
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The Elektro Ljubljana Group has been technologically advanced from day 1, and has remained at the top ever since. Through all this time we keep on making sure that electric power serves Slovenians and leads unwaveringly toward development. We started as pioneers of progress that serves the people with the installation of Slovenia’s very first public lightning at the end of 19th century, and have continued innovating up to the present day, literally powering the development and establishment of electric mobility.
By building water and power plant in Kočevje the town was provided with drinking water and electric power. The start of electric power in the town, produced by the Rinža river, was the start of the public electric power network and the birth of public electricity use in Slovenia.
On 1 January 1898 Ljubljana shined in a new light, thanks to the first electric lamps. Ljubljana got its own thermal power station that was owned by the municipality and was therefore public, in contrast to industrial power plants. The electricity produced by Ljubljana City Power station (Mestna elektrarna Ljubljana) was used mostly for public lightning; it was comprised of 794 light bulbs and 48 arc lamps. Electric lightning was introduced to public buildings as well, while the rest of the city’s electrification took longer to implement.
In 1890 a watchman from Trbovlje created a simple electrical dynamo and tested it on a steam-powered sawmill used in a mine. In 1903 Trbovlje's coal mining groups installed electric lightning in two mine passages and started driving ventilators on the Gvido dynamo. In 1904 they added two more generators: one steam-powered sawmill in the central mining workshops and the other by the separation of coal, which was powered by a steam locomotive. This generator was used only for providing electric lightning when separating coal and for powering the narrow-gauge railway. The generators were connected through the transformer and 700-meter long open loop duct. The Trbovlje coal mining group (TPD) also started with the electrification of mining villages, which started to be considered as part of the group, due to lack of the Group's concession for the public distribution of electrical power.
Electrification of the Dolenjska region started when Franc Seidl and Josip Košiček built a small 50 kVA power station and a 3kV transmission line to a hospital in the town of Novo Mesto.
To electrify the rest of the buildings in Trbovlje the municipality set up a cooperative, which in 1913 built a power plant with power of 2 x 25 kW, voltage of 2 x 150 V, and an accumulator battery. That way public electrification was established in Trbovlje and electric power also reached the houses that weren't a part of mining complex.
At the Ljubljana City Power Station in Ljubljana (MEL) two motors start producing alternating current besides direct current, thus ensuring a three-phase current.
MEL takes over the Electric Cooperative in Šiška and unifies the electricity supply in Ljubljana.
Activities slow down, with only two transformer stations being built. During the war the power plant is handed over to an Italian officer, while the distribution transformer station in Črnuče and the hydropower plant in Česenj are held under German occupation.
Direct current is abandoned in MEL.
Trams are phased out in Ljubljana and MEL is slowed down. With the beginning of the 1960s the Heat Production Plant takes over providing electricity for Ljubljana.
With new laws new electric power distributing companies are established, making Elektro Ljubljana City, Elektro Ljubljana Environs, Elektro Kočevje, Elektro Novo Mesto, and Elektro Trbovlje, which were previously independent companies, become new business units of Elektro Ljubljana.
Start of transition from 35 kV to 110 kV voltage.
Introduction of a secondary protection system.
Implementation of the business information system begins.
Start of transition from 10 kV to 20 kV voltage level.
Implementation of remote plant control.
Neutral point grounding in medium-voltage begins.
Start of introducing computer processing in management centers.
Beginning of the integrated information center.
Based on the privatization of state assets, the public company becomes a joint-stock company, with the majority shareowner being the State.
Digital systems start being implemented into remote controlling.
Implementation of single medium-voltage collectors in substations.
Introduction of covered conductors.
Start of network tone controls at the 110 kV level.
Universal medium-voltage conductor cables come to use.
The beginning of data transfer through optical fibers wrapped around overhead-line 110 kV conductors.
Founding of the Elektro Ljubljana Group’s Small Hydropower Plants, which cover renewable sources engineering. Today they operate as a subsidiary of Elektro Ljubljana, under the name Elektro Ljubljana OVE, d. o. o.
The electricity market opens completely, allowing every citizen to freely choose their electricity supplier.
Beginning of neutral-point indirect grounding through resonant inductor implementation
First electric vehicle charging station is being placed.
To separate network and retail operations the process of purchasing and selling electricity is taken over by a new company. On 1 December 2011 the subsidiary Elektro energija, d. o. o. starts fully functioning.
The first virtual power plant acts in the electric power system. This allows for the implementation of adjusted consumption services and accelerated production with the help of industrial customers without the risk of overloads in the distribution network. The virtual power plant reduces the network load with no investments, while the service can also be used to optimize a supplier's portfolio.
February sleet affected over 400 km of network and over 100.000 customers in the area of Elektro Ljubljana remained without power. More than 1.750 power lines were damaged.
Over 500 workers of Elektro Ljubljana participated in response to the consequences of the natural disaster, giving all their best to re-establish power supply to the customers in the shortest time possible.
Electricity storage is installed as the first battery system in the electricity distribution network.
The merger of our subsidiary Elektro energija with the best strategic partner allows a long-term consolidation of a leading position on the Slovenian energy market and preserving excellent service to our customers.