The Lowlands Line from Kalajoki to Jämsä will enable new customer connections to the main grid, improve overall security of the power system, and increase transmission capacity from the west coast to southern Finland.
Three new substations will be built in addition to the transmission line to “enable new renewable electricity production in areas where main grid connections have so far been impossible”, according to Fingrid.
Reinforcing the north-south transmission capacity will boost the electricity market’s efficiency and enable Finland to remain a single-price area in the electricity market, it said.
Wind power development on the west coast has soared, with approximately 5GW set to be built, according to Fingrid.
“The Lowlands Line to strengthen electricity transmission on the west coast will be one of Fingrid’s most important investment projects in the coming years,” the company said.
The project will be completed in phases. The transmission line section between Jylkkä and Alajärvi will be completed in 2027 while the section between Alajärvi and Toivila will be finished in 2028.
A separate transmission line from Åback to Nokia is planned to strengthen the power system in the southern part of the west coast. This is to be completed in 2028.
The planned projects are based on forecasts of Finland’s future electricity production and consumption structure.
Fingrid plans to invest around €4 billion in the main grid over the next ten years to power the green transition.
One precondition for the realisation of the investment programme is a licensing and regulatory environment that supports the main grid investments.
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