New Kruununhaka Substation Strengthens Electricity Distribution in Central Helsinki
Helen Electricity Network has commissioned a new substation in Kruununhaka, strengthening electricity distribution in Helsinki’s city centre and improving security of supply amid growing electricity demand. The new facility replaces an old substation that had reached the end of its technical lifecycle and, in line with circular economy principles, makes use of recycled main transformers..
A distinctive feature of the Kruununhaka substation is its exceptionally compact design. Built on a tight site, the new substation has six storeys — an uncommon solution for substations in Finland. This approach enables the placement of critical electricity infrastructure within a dense urban environment without extensive land use.
“Helsinki’s electricity network has long been one of the most reliable in Europe. The renewal of the Kruununhaka substation ensures that power will remain on in the future as loads continue to grow. The substation has been dimensioned to meet the long-term needs of the inner city and supports the City of Helsinki’s growth and climate objectives,” says Jyrki Nieminen, Director of Asset Management at Helen Electricity Network.
Recycled transformers extend equipment life cycles
Circular economy solutions are put into practice at the Kruununhaka substation. The main transformers used at the site have been relocated from Helen’s Katri Vala heat pump plant, where they were replaced with larger-capacity transformers.
Although approximately 25 years old, the transformers still have significant technical service life remaining, as their typical lifespan is around 50 years. This solution extends the life cycle of the equipment and reduces the need for new components, while also improving the resource and cost efficiency of the investment.
“By recycling transformers, we can simultaneously strengthen the electricity network, reduce environmental impacts and make sensible use of existing assets. High-quality equipment now serves a new purpose instead of being unnecessarily replaced,” Nieminen explains.
Ready to meet the growing needs of the inner city
Electricity consumption in Helsinki is increasing rapidly as transport, heating and industry become increasingly electrified. The new Kruununhaka substation reinforces the inner-city network especially in areas with a large stock of older buildings and dense urban housing. It also facilitates the connection of new electricity supply points and solutions such as property-specific charging infrastructure.
The Kruununhaka substation is part of Helen Electricity Network’s extensive investment programme, which responds to growing transmission needs and supports Helsinki’s clean transition.