The Helsinki 400 kilovolt power cable connection

Project status

The project is currently in the general planning phase.

Project background

The City of Helsinki, Helen Electricity Network Ltd and Fingrid Oyj (the parties) have jointly investigated the overall technical solution in the electricity distribution grid and main grid required for the realization of Western boulevard city. From an overall economic point of view, a joint solution between the three operators is the most profitable option.

An agreement on general planning between the parties was signed in December 2020. The agreement initiates the general planning phase of the project, which will specify the technical design, costs and schedule of all parties.

Within the general planning phase, it is the responsibility of Fingrid Oyj to perform the general planning for a new 400 kilovolt power cable connection between Länsisalmi in Vantaa and Viikinmäki in Helsinki. This new power cable connection will enable the City of Helsinki to release land for the construction of Western boulevard city. At the same time, the conditions for the development of the electricity transmission network in line with carbon neutrality targets will be secured and the urban environment will be improved.

Project schedule

The aim is that Fingrid's general plans will be ready for the parties' final investment decisions in 2022 and Fingrid will construct the 400 kV cable connection from Länsisalmi to Viikinmäki to the new Vanhakaupunki transformer substation tentatively by the end of 2026.