Nordic transmission system operators

In practice, operation of power system and system responsibility cover the following duties:

Definition of the system security level of the Finnish power system and maintenance of system technical requirements
Operational planning of the main transmission grid
Management of transmissions in the main grid and through cross-border connections
Frequency maintenance
National balance management and settlement
Maintenance of reserves required by the operation of the power system
Management of disturbance situations concerning the entire power system.

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