Power plant equipped with modern technology

Last year, the Swiss energy supplier Repower AG carried out a comprehensive modernisation project to ensure the Ferrera power plant in Grisons was fit for the future. The plant is owned by Ovra electrica Ferrera SA, 51% of which is owned by the municipality of Trun and 49% by Repower. Basically, with the exception of structures and the penstock, the plant’s entire technical infrastructure was renewed or revitalised. In the power plant control centre, the 2-nozzle Pelton turbine and the directly-coupled synchronous generator underwent a retrofitting programme. There was a complete redesign of all the electrical and control equipment that had caused repeated malfunctions and operational failures in the past. Various hydraulic steelwork components and the shut-off and regulating devices at the water intake were also modernised or refurbish­ed. The Grisons power plant has an average output capacity of 17.6 GWh and comprehensive modernisation has ensured the plant is ideally equipped for the decades ahead. Around CHF 2.7 million was invested in the modernisation of the plant.