Power system
Elering is responsible for the operation of the Estonian electricity system as a whole, ensuring that consumers are provided with electricity supply of the required quality at all times. To this end, Elering manages and develops the national transmission system and international connections.
The electricity transmission system managed by Elering connects power plants, distribution networks and electricity consumers in Estonia into a single whole. You can read more about the power lines of the transmission system here.
Estonian electricity system
The Estonian electricity system belongs to the large synchronously operating Continental Europe Synchronous Area, which extends from Portugal to Estonia. Neighbour to the Estonian electricity system in the Continental Europe Synchronous Area is the Latvian power system, to which we are connected by three 330 kV lines — the Tartu-Valmiera overhead line, the Tsirguliina-Valmiera overhead line, and the third connection completed in 2021, which consists of the Harku-Lihula-Sindi 330/110-kilovolt line on Estonian territory and the section of the Kilingi-Nõmme-Riga 330-kilovolt line to the Estonian-Latvian border.
Since the middle of the last decade, Estonia has been increasingly connected to the Nordic power system. In 2006, the EstLink 1 direct current connection between Estonia and Finland was completed, which was the first connection of Estonia and the Baltic States to Scandinavia. The second Estonian-Finnish direct current connection, EstLink 2, was completed in 2014 and increased the transmission capacity between the two countries to 1,000 megawatts.
Elering as a system operator
Elering acts as the system operator of the Estonian electricity system, whose task is to plan the operation and manage the system in such a way that the safe and reliable operation of the network is always ensured. In addition to enabling the transmission of electricity, Elering is also responsible for balance management to ensure the balance of consumption and generation in the system at any given time.
Estonia is a member of the European Network of Transmission System Operators for Electricity (ENTSO-E). The organisation’s mission, among others, is to increase the transparency of the functioning of the electricity market and power system. The information system created for this purpose can be found at transparency.entsoe.eu.
To view the ENTSO-E Northern European electricity transmission system map, click on the image below.
Northern European electricity transmission system
Data archive
The data archive contains all data concerning the Estonian electricity system since 2003. From in 2020, archived data can be downloaded and monitored on Elering Live.
Data for 2003–2009 include generation and consumption data from the SCADA metering system; data measured on cross-border lines come from the commercial metering system (AMR).
Since 2010, the files have included planned and actual data for the Estonian electricity system.
The planned data comes from the final balancing schedules and therefore also includes intraday changes by balance providers. The actual measurements recorded in Elering’s control and monitoring system SCADA have been provided for comparison. The SCADA system saves the average measurements of the previous 5 minutes to its archive every 5 minutes, the files below contain the average of all 5-minute average measurements for each hour.