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Main grid

Imatra 1929 and 2020

The Imatra hydroelectric power plant began operating in 1929, along with the Imatra substation, which was the first substation on Finland’s main grid. The first transmission line on the main grid went from Imatra to Vyborg and onwards to Helsinki and Turku via Hikiä. In 2020, Fingrid commissioned a new substation in Imatra and began modernising the Imatra–Huutokoski transmission line.