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15.2.2013 13:30
Current News, Projects, Power System

Fingrid builds new 110 kV substation to Naantali

Fingrid Oyj has made an investment decision on 6th of February 2013 to build a new Naantalinsalmi 110 kV substation. The new substation makes it possible to connect the new HVDC submarine cable between Åland and Continental Finland. The new substation will also replace the existing 110 kV switchgear located in Naantali power plant. The old switchgear does no longer fulfill the operational reliability demands of Finnish national grid.

The new substation will be built to approximately 1 km distance from the existing substation just beside the 110kV power line route. The 110 kV switchgear will be 2 main bus + 1 transfer bus air isolated type including 12 feeder bays and 1 bus breaker bay. The future growth expectations in energy production and consumption on Turku region has been taken into consideration on space reservations of the switch gear. The 11.2 hectare substation site also enables to extend the substation with a  400 kV switchgear, power transformers and a reactor plant. The estimated total cost of the investment is 8.8 million euros.

Building of the substation will be launched on spring 2013 and the station will be completed on 2015, parallel with a HVDC converter station built on neighbour real estate by Kraftnät Åland. The transmission system operator on Åland, Kraftnät Åland Ab, will build a submarine cable to Continental Finland. The cable will come into operation late in 2015. The interconnection will be connected to Fingrid's transmission grid in Naantali.

The transmission capacity of the submarine cable is 100 MW. 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 of between Sweden and Åland is 80 MW.

For further information of the cable interconnection please contact:
Managing Director Jan Kahlroth, Kraftnät Åland, tel. +358 18 539 252 or mob. +358 457 5692 776

For further information of the 110kV substation please contact:
Executive Vice President Kari Kuusela, Fingrid Oyj, tel. +358 (0)30 395 5129 or Manager, Grid Planning,  Aki Laurila, Fingrid Oyj, tel. +358 (0)30 395 5135