According to the operating principles of the electricity market each market participant must ensure that the quantity of electricity given into or purchased from the grid in each trading period is equal to the quantity of electricity taken from or sold into the grid.
In practice, market participants are not able to do this for every hour. Therefore, each one must have a contract with a supplier to ensure that shortfalls of electricity are covered and excess electricity is purchased. This system is called open supply. The open supplier, who has an open supply contract with the Transmission System Operator, is called a balance provider.
The following balance providers are operating in the Estonian electricity market:
- Alexela Energia AS
- Axpo Nordic AS
- Eesti Energia AS
- Elektrum Eesti OÜ
- Fortum Eesti AS
- INTER RAO Eesti OÜ
- Nordic Power Management OÜ
- Scener OÜ
The open supply contract between the balance provider and the TSO is called a balance agreement. The standard terms and conditions of this agreement are publicly disclosed and are the same for all balance providers. The balance agreement consists of the rules for balance service and the conditions for the purchase and sale of imbalance energy.
Attached down below you can find the complete list of all the open suppliers participating in the Estonian Electricity market.