Gas system
Elering provides the natural gas transmission service, which is the transport of gas in the transmission system from the Estonian border to the connection points of clients.
Elering acquired control of the natural gas transmission system in January 2015. Until the end of the same year, the natural gas transmission system operated under the name Elering Gaas AS. Since the beginning of 2016, Elering has consolidated its electricity and gas transmission systems into one company and continues to operate as a combined system operator.
Monthly summaries for the gas system
Every month, Elering publishes a gas system summary on its website, which highlights the most important indicators in the gas system for the previous month.
Calculation of transmission capacity
Technical transmission capacity means the maximum firm capacity that the transmission system operator can offer to network users, taking into account the integrity of the transmission system and the efficient operation of the system. Technical transmission capacity is calculated and offered to network users at all relevant entry-exit points of the Estonian natural gas transmission system.
To calculate the technical transmission capacity, the entire transmission system and its related parameters must be taken into account. Since the transmission system is a large and complex system of pipelines affected by many variables, the gas calculation software SIMONE is used to calculate the technical capacity. SIMONE allows creating a model describing the transmission system and performing static and dynamic gas network simulations.
The transmission system model created in SIMONE describes the transmission system and its operating dynamics as accurately as possible. When creating a system model and performing simulations in SIMONE, several system components and parameters are taken into account:
- Pipe length
- Pipe diameter
- Pipe roughness
- Valve stations
- Adjustment stations
- Gas compressor stations
- Gas metering stations (GMS)
- Gas distribution stations (GDS)
- Limiting parameters of the transmission system (e.g. maximum operating pressure of pipes; minimum GDS pressure; maximum permissible gas velocity)
In addition to the transmission system, the calculation of the technical transmission capacity takes into account gas consumption, different gas supply scenarios, planned investments and all known maintenance work in the transmission system at the time of the calculations.
Maintenance work
The gas system operators of the Baltic-Finnish region AB Amber Grid, Conexus Baltic Grid AS, Elering AS and Gasgrid Finland Oy, together with the LNG system operators AB KN Energies and Floating LNG Terminal Finland Oy, have jointly prepared a maintenance plan for the Baltic-Finnish region for the period from October 2024 to December 2025 and 2026.
The maintenance schedule includes scheduled maintenance of the region’s gas transmission system, LNG terminals and the Inčukalns underground gas storage facility, and the transmission capacity available to the market.
The maintenance plan for 2025 describes the situation as at 27 January 2025 and the plan for 2026 as at 30 June 2025.
The direction of capacity (entry/exit) indicated in the document is from the perspective of the transmission system operator performing the maintenance work. For example, the probing carried out by Elering limits the entry capacity of Balticconnector from Elering’s point of view (FIN->EE). This means that the limitation affects the exit direction (FIN->EE) from Gasgrid Finland’s point of view.
Any further changes to the maintenance plan will be published as Urgent Market Notices (UMM) on the ENTSOG Transparency platform. Information on technical transmission capacities can also be found on the ENTSOG Transparency platform.
Updated information is available on the following websites: