Soto de Ribera Combined Cycle Gas Turbine

The Soto de Ribera Combined Cycle Gas Turbine (CCGT) is located in the municipality of Ribera de Arriba (Asturias), downstream from the confluence of the rivers Nalon and Caudal. It is about 7 km from Oviedo, and the ground level is located at an elevation of 126.5 m. above sea level

It currently consists of two combined cycle sets, Soto 4 and Soto5, using natural gas as the main fuel, with a net capacity of 426,04 and 428,13 MW respectively.

The first set of the Soto de Ribera Combined Cycle Power Plant (Soto 4) began operations in November 2008, being the first unit of its kind to enter commercial operation in the Principality of Asturias. In 2010 was put into operation the second combined cycle set (Soto 5).

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Soto 5 Technical Data

Plant General Data




  • Gross Capacity (MW): 433,6.

  • Net Capacity (MW): 428,1.

  • Gross yield (%):  58,9.

  • Main fuel: gas natural.





Gas turbine




  • Type: Alstom GT 26B.

  • Capacity (MW): 274.

  • No. compressor stages: 22.

  • Compression ratio: 31:1.

  • Exhaust gas flow (kg/s): 634,8.

  • Exhaust gas temperature (°C): 620,6.





Alternator




  • Type: Turbogenerador Alstom Topgas.

  • Capacity: 530 MVA, 21 kV.





Steam Turbine




  • Type: Alstom eje único, doble carcasa, tres presiones de vapor.

  • AP body input temp./pressure (ºC/bar): 565/136.

  • MP body input temp./pressure (ºC/bar): 565/29.

  • BP body input temp./pressure (ºC/bar): 288/4,6.

  • Capacity (MW): 158.





Heat-Recovery Boiler




  • Type: Alstom Windsor type horizontal boiler, three pressures with superheating, natural circulation.





Steam Conditions:




  • AP section output temp./ pressure (°C/ bar): 567/139.

  • MP section output temp./ pressure (°C/ bar): 566/29.

  • BP section output temp./ pressure (°C/ bar): 289/4,9.


Soto 4 Technical Data

Plant General Data




  • Gross Capacity (MW): 431,9.

  • Net capacity (MW): 426,0.

  • Gross yield (%): 58,7.

  • Main Fuel: gas natural.

  • Auxiliary fuel: gasóleo.



Gas turbine




  • Type: Alstom GT 26B.

  • Capacity (MW): 269,8.

  • No. compressor stages: 22.

  • Compression ratio: 31:1.

  • Exhaust gas flow (kg/s): 641,4.

  • Exhaust gas temperature (°C): 615,5.





Alternator




  • Type: Turbogenerador Alstom Topgas.

  • Capacidade: 500 MVA, 21 kV.





Steam Turbine




  • Type: Alstom eje único, doble carcasa, tres presiones de vapor.

  • AP body input temp./pressure (°C/bar): 565/136.

  • MP body input temp./pressure (°C/bar): 565/29.

  • BP body input temp./pressure (°C/bar): 286/4,6.

  • Power (MW): 156.





Heat recovery boiler



Type: Alstom Windsor type horizontal boiler, three pressures with superheating, natural circulation.



Steam conditions:




  • AP section output temp./pressure (°C/bar): 567/139.

  • MP section output temp./pressure (ºC/bar): 566/29.

  • BP section output temp./presión BP (ºC/bar): 286/4,9.


Soto 3 Technical Data

Steam generator




  • Pulverized coal; Tilting tangential burners.

  • Controlled circulation with a single tank.

  • With intermediate reheater.

  • Capacity:

    • 1,120 Tm/h. of superheated steam at 175 Kg/cm² and 540° C.

    • 984 Tm/h of superheated steam at 44.6 Kg/cm² 540° C.



  • Design pressure: 208 kg/cm².

  • Manufacturer: Combustion Engineering.





Turbo Alternator Set




  • 2-cylinder turbine, tandem condensation, superheating and 7 extractions.

  • Hydrogen-cooled alternator.

  • Armature rotor type exciter, brushless.

  • Inverted regulation of static voltage.

  • Input steam conditions: 169 bar and 538° C.

  • Voltage generation: 20,000 V.

  • Nominal capacity of the set: 428,900 KVA.

  • Manufacturer: Westinghouse.


Visit Programme

Direction: 33172 - Soto de Ribera



Group: 25 people



Day of visit: Thursday



Hour hand: 10:00 am



Duration: 1-1:30h



Activity: Free



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