16.5.2022 13:49
Current News, Press Releases, Projects

Joint project in Hepokorpi, Espoo, to create significant climate benefits

Fingrid is planning a new 400/110-kilovolt substation for the main grid in Hepokorpi, Espoo, near Ring III. The substation will safeguard the electricity supply in the Helsinki metropolitan area as electricity consumption increases. The Hepokorpi substation is one part of a project entity involving several parties. The project entity will contribute to enabling Espoo to achieve its climate goals.

The Hepokorpi substation is planned for construction from 2023 to 2025 in the Hepokorvenkallio area of Espoo. The area is between Hepokorpi and the Tollinmäki residential area to the north of Ring III. This is a good location in terms of electricity distribution, as a 400-kilovolt main grid line passes through the area, so it will not be necessary to build any new transmission line connections to the main grid.

The new substation will play a crucial role in electricity transmission and the security of supply in the western part of the Helsinki metropolitan area. According to the plan, the local distribution system operator, Caruna Espoo Oy, will connect to the station, ensuring a reliable electricity supply well into the future. A Microsoft data centre and a Fortum heat pump plant will also connect to the substation. Fortum will use the waste heat from the data centre to provide emission-free district heating.

“Industry, city heating and transport are electrifying at a rapid rate as Finland heads towards its target of becoming carbon neutral. This multi-party project entity with help Espoo achieve its target of becoming carbon neutral by 2030. It will also contribute to Fortum’s target of phasing out coal-fired district heating by 2025. This is a concrete example of how carbon dioxide emissions can be significantly reduced. It is great that large-scale joint projects like this are being promoted in collaboration with different parties,” says Jarno Sederlund, Customer Manager at Fingrid.


Hepokorvi substation was designed by Virkkunen & Co architects. The design incorporates architectonic values, which will make the substation a natural part of the urban environment.

The Hepokorvenkallio area has been planned in close cooperation with customers and stakeholders.

Further information:

Petri Parviainen, Unit Manager, Fingrid Oyj, tel. +358303955282

Jarno Sederlund, Customer Manager, Fingrid Oyj, tel. +358405195071

Email addresses are in the form firstname.lastname@fingrid.fi