Transmission area division

Finland's internal transmission area division is used for maintaining the reliability of the main grid and electricity system during the balancing time frame. Transmission area division is used for production plans and the allocation of bids in the balancing energy and balancing capacity markets. Transmission area refers to the geographical area in which the power plants, consumption units or energy storages are located. The transmission area division was renewed on May 22, 2023 along with the Terms and conditions for providers of manual Frequency Restoration Reserves.

According to the current division, Finland has three transmission areas: south, central and north, the geographical locations of which is shown on the map below.