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GE, 9351 FA, 388 MW, Combined Cycle Power Plant

Description

  1. Overview
    1. Plant capacity: 388.5 MW at site condition with GT evaporative cooling, duct firing and fuel gas heating on.
    2. Site conditions: DBT-29.2°C, RH-71%, atm. pressure – 1010.7 mbar, elevation – 24.5 m above MSL.
    3. Plant heat rate: 1730 kcal/kWh (on HHV).
    4. Auxiliary power consumption for plant: 10.450 MWh (2.69%).
    5. Guaranteed emissions limits: NOx – 35 ppmv & CO – 15 ppmv @ 15% O2.
    6. Plant O&M: O&M as per OEM; CSA (LTMA and LTAPSA) by GE for gas turbine and generator.
    7. Power evacuation: through 2 quad moose feeders from 400 kV switch yard.
    8. Supplementary duct firing: 27.3 MW (47.3 M kcal/hr).
    9. Water consumption: 13392 m³/day.
    10. Plant start up time: cold start up – 260 min, warm start up – 120 min, hot start up – 90 min.
    11. Fuel: natural gas with HHV – 9832 kcal/m³ at 35 bar, 15°C.
    12. Plant area: 26 acres (built up area).
  2. Gas Turbine
    1. Make: GE 9351 FA with DLN2.0+.
    2. Site rating: 232.54 MW.
    3. Special features: indoor installation; heavy duty 9FA gas turbines from the experienced F class fleet with over 25 million hours of operation.
    4. Enhanced 24K hardware for increased reliability and availability.
    5. Mark VI control system controls the gas turbine using real-time physics based modeling, increasing the overall performance, operability, and reliability of the gas turbine.
    6. Capacity: 233x MW (at site conditions).
    7. Fuel: natural gas.
    8. Starting: load commutated inverter (LCI).
    9. Air filtration: self-cleaning.
    10. Inlet air cooling: evaporative cooler.
    11. Compressor cleaning: on-line and off-line water wash.
    12. Exhaust system: exhaust diffuser with expansion joint for axial exit.
    13. Emissions control: dry low NOx 2.0+.
  3. Gas Turbine Generator
    1. Make: GE.
    2. Rating: 285 MVA hydrogen cooled.
    3. Frequency: 50 Hz.
    4. Cooling: hydrogen.
    5. Power factor (PF): 0.80 lagging, capability to 0.95 leading.
    6. Terminal voltage: 15.75 kV.
    7. Generator excitation: digital static bus fed.
  4. Steam Turbine
    1. Make: ALSTOM ST-F15.
    2. Site rating: 156 MW.
    3. Special features: reheat, single flow, condensing type; 2 casing, condensing steam turbine; sliding pressure operation; triple pressure single reheat; manufactured by ALSTOM Germany; 100% bypass capability for HRH/LP.
    4. Capacity: 156.15 MW.
    5. Main steam parameters: HP steam: 324 t/hr @ 127 bar, 568°C; IP steam: 361 t/hr @ 26 bar, 568°C; LP steam: 32 t/hr @ 5 bar, 320°C.
  5. Steam Turbine Generator
    1. Make: ALSTOM.
    2. Rating: 183.7 MVA.
    3. Frequency: 50 Hz.
    4. Power factor (PF): 0.85 lagging.
    5. Terminal voltage: 15.75 kV.
    6. Cooling: air cooled.
  6. Supplementary Firing
    1. Make: supplied by CMI.
    2. Rating: approx. 20 MW.
    3. Special features: on-line type with BMS.
  7. Power Transformers
    1. Power transformer for GTG: make CGL, rating 290 MVA.
    2. Power transformer for STG: make CGL, rating 190 MVA.
    3. Unit auxiliary transformer: make VOLT AMP, rating 20 MVA.
  8. Emergency Diesel Generator (EDG)
    1. Make: CUMMINS.
    2. Rating: 1.01 MVA.
  9. Pumps
    1. Circulating water pump: make WPIL, rating 18000 m³/hr.
    2. Condensate extraction pump: make SULZER, rating 430 m³/hr.
  10. Condition
    1. Plant O&M as per OEM.
    2. CSA (LTMA and LTAPSA) by GE for gas turbine and generator.
    1. Plant area: 26 acres (built up area).