Kraftnät Åland owns and operates the electricity grid in Åland, an autonomic area of Finland, consisting of 300 km 110 kV and 45 kV power lines with substations, interconnections and IT system. Kraftnät Åland will construct a new HVDC-link between Naantali, Finland and Ytterby, Åland. The interconnection is built to improve power system security on Åland. The technical transmission capacity between Central Sweden and Continental Finland will be increased at the maximum 80 MW to both directions, as the current interconnection capacity between Sweden and Åland is 80 MW. Due to the new interconnection, the existing transmission network on Åland must be reinforced.

A new 110 kV station Tellholm will be built adjacent to the land landing location of the existing sea cable feed from Sweden. The feed from Sweden, which currently goes directly to the existing station Tingsbacka, will continue through this new station. Station Tellholm will also allow connection of a number of wind farms at a later stage.

A new 110 kV and 45 kV transmission line will be built between the existing station Tingsbacka and the new HVDC station Ytterby. For that, existing Tingsbacka 110 kV switchgear  shall be completed by a new 110 kV line feeder. The 110 kV cable connections for the new overhead line between Tingsbacka and Ytterby is also included in the contract, 110 kV cable route length being over 2 km.

As a branch connection to the new line between Tingsbacka and Ytterby another 110 kV line will be built to the existing station Norrböle. Access point for it is in Ingby. In Norrböle a new substation 110/45 kV including power transformer 63 MVA will be built adjacent to the existing 45 kV station.
In Naantali 110 kV cable connection between the new HVDC station and a feeder in a new Fingrid Naantali 110 kV substation is part of the contract.