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The Finnish electricity production network utilizes many different energy sources and production methods. The primary energy sources used to produce electricity are nuclear power, hydropower, coal, natural gas, wood fuels, peat, oil, and wind.

TVO discontinued the production of wind power in 2017. The plant structures and the generator were in such a severe state of disrepair that it was no longer sensible to try to repair them. The 1 MW wind power plant was erected on the Island of Olkiluoto in 2004 for a practical study of the wind conditions and production opportunities of wind power in the power plant area. Olkiluoto also has a 100 MW gas turbine reserve power plant built as a joint project of Fingrid Oyj and TVO. Furthermore, TVO owns a 45% share of a coal-fired power plant located in Meri-Pori.