Success story Symphony Plus Melody upgrade integrates control and reduces costs at Brista CHPP in Sweden The Swedish energy company, AB Fortum Värme, has selected ABB Symphony Plus Melody automation to upgrade the control system at its Brista CHPP (combined heat and power plant) in Märsta/Arlanda, about 40 km west of Stockholm. The task Since Brista unit 1 was commissioned 18 years ago, the 44 MWel, 120 MWth CHPP has been operating reliably with ABB Contronic E and Freelance control systems. The plant consists of two generating units producing both electricity and district heating for the city of Stockholm. Unit 1 is a fluidized bed boiler system using biomass (wood chips) as fuel; unit 2 was constructed as a waste-to-energy (WtE) plant. Unit 1 originally used a Contronic E sy

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