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Siemens, V94.2, 2006, Combined Cycle Power Plant, 445 MW, 50Hz

Description

  1. Overview
    1. Combined cycle power plant based on Siemens V94.2 gas turbines.
    2. Total plant output: 445 MW.
    3. Plant installed in 2006; natural gas available from March 2009.
    4. Commissioning dates: GT #1A on 30 March 2009, GT #1B on 10 March 2009.
    5. Open cycle declared on 04 June 2009.
    6. STG commissioned on 22 June 2010.
    7. Combined cycle declared on 30 June 2010.
    8. Running hours: GT #1A = 32,361 EOH, GT #1B = 22,913 EOH, STG = 19,460 EOH.
    9. Steam turbine operating hours: 17,900 hours.
    10. Gas turbines feature built-in dehumidifier (V94.2).
  2. Technical Details
    1. Gas turbine: Siemens Electric V94.2, 139 MW, quantity: 2.
    2. Gas turbine generator: Electrosila, quantity: 2.
    3. Steam turbine: LMZ K166/107, 158 MW, quantity: 1.
    4. Steam turbine generator: Electrosila 15.85 kV, 200 MW, quantity: 1.
    5. Heat recovery boiler: L&T, HP 222 TPH @ 107 bar, MP 38 TPH @ 22 bar, LP 19 TPH @ 4.5 bar, quantity: 2.
    6. Generator transformers: Crompton Greaves 400 kV / 15.75 kV, quantity: 2.
    7. Auxiliary transformers: Crompton Greaves 6.6 kV / 415 V, quantity: 2.
    8. HP/IP/LP boiler feedwater pumps: Nasosenergomash, 270 m³/hr, quantity: 3.
    9. Boiler feedwater pumps: Nasosenergomash, 65 m³/hr, quantity: 2.
    10. Boiler feedwater pumps: Kirloskar, 25 m³/hr, quantity: 2.
    11. Condensate extraction pump: Nasosenergomash 245 TPH, quantity: 2.
    12. DM plant: Doshi Ion Exchange, quantity: 1.
    13. CW pumps: Kirloskar, quantity: 3.
    14. CW pump motors: WEG, quantity: 3.
    15. Cooling tower: Paharpur, 16 cells, quantity: 1.
    16. Emergency diesel generator: Cummins 1250 kVA, quantity: 1.
  3. Gas Turbine Specifications
    1. Brand: Siemens.
    2. Model: BM 380.
    3. Frame: V94.2.
    4. Design ISO output: 156,000 kW.
    5. Overall correction factor for power: 0.8938.
    6. Auxiliary power consumption: 1,409 kW.
    7. Net site electrical output in open cycle mode: 139,530 kW.
    8. Net electrical output in combined cycle mode: 139,086 kW.
    9. Heat rate correction factor to site condition: 0.966.
    10. Net heat rate on LCV basis: 2,675.6 kcal/hr (GT heat rate for combined cycle operation).
    11. Type of fuel: natural gas.
    12. Type of governing system: Siemens Symadyn.
    13. Exhaust temperature: 556.2 °C.
    14. Exhaust flow: 480.87 kg/sec.
    15. Fuel consumption: 9.9 kg/sec.
    16. NOx level: 50 ppm.
    17. NOx control: dry low NOx burners.
    18. Turning gear: through oil jets around 100 rpm.
    19. Full speed of machine: 3,000 rpm.
    20. Compressor: axial, 17 stage, 5th and 10th stage for bleeding.
    21. Turbine: 2 combustion chambers, 4 stage.
    22. Water washing: DM water, offline as well as online.
    23. Starting device: electrical starting through generator and frequency converter; power requirement = 2,900 kW.
    24. Air filter: 2 micron, main and pre filter, self-cleaning pulse jet type.
  4. Gas Turbine Auxiliaries
    1. Shaft mounted oil pump: not provided.
    2. Auxiliary oil pump: 37 kW, quantity 2.
    3. Emergency oil pump: 37 kW, quantity 1.
    4. Vapour extraction fan: 0.3 kW, quantity 1.
    5. Turning gear: hydraulic oil driven, quantity 1.
    6. Air filter cleaning compressor: quantity 2.
  5. GT Exhaust System - Diverter Damper
    1. Brand: Bachmann Limited, Faridabad.
    2. Position: between inlet duct and guillotine damper.
    3. Damper dimensions: 5,600 x 5,600 mm.
    4. Quantity: 2 for GTG #1A and #1B.
    5. Sealing system: duplex.
    6. Sealing efficiency: 100% with SAF, 99.98% without SAF.
    7. Function: isolation.
    8. Operating time: 60 seconds.
    9. Max. operating temperature: 600 °C.
    10. Main drive actuator: Limitorque, Faridabad SMB-4, quantity 1, data sheet no. J-0787/03-004.
    11. Gear box: Limitorque, Faridabad H10 BC + SGA2.92, quantity 1, data sheet no. J-0787/03-004.
    12. Motor for blower: CGL sq. cage, 3 phase AC, size 20 HP, quantity 2, data sheet no. J-0787-03-0006.
    13. Gate valve actuator: Limitorque, Faridabad electric, size L120-20, quantity 2, data sheet no. J-0787-03-0004.
    14. B.F.V. actuator: Limitorque, Faridabad electric, size L120-10 + T-100, quantity 1, data sheet no. J-0787-03-0004.
    15. Gate valve: K.S.B., class 150#, size 200 NB, quantity 2.
    16. Blade seals: Bachmann Limited, Faridabad, flexible metal, material Inconel 625, quantity 2 sets/unit (1 HRSG side and 1 bypass side).
    17. Reference documents: GA drg no. J-0787-03-0000, R4, 10 sheets.
  6. GT Exhaust System - Guillotine Damper
    1. Position: between diverter damper and HRSG inlet.
    2. Damper dimensions: 5,600 mm x 5,600 mm.
    3. Quantity: 2 for GTG #1A and #1B.
    4. Sealing system: duplex.
    5. Sealing efficiency: 100% with SAF, 99.98% without SAF.
    6. Function: isolation.
    7. Operating time: 5 minutes.
    8. Max. operating temperature: 600 °C.
    9. Main drive actuator: Limitorque, Faridabad SMB-3, quantity 1, motor 19.74 HP, 4 pole.
    10. Gear box: Limitorque, Faridabad H6 BC, quantity 1.
    11. Motor for blower: CGL sq. cage, 3 phase AC, size 7.26 HP, 2 pole.
    12. Gate valve actuator: Limitorque, Faridabad electric, size L120-10, motor 0.54 HP, 2 pole.
    13. Reference documents: P&ID no. J-0787-03-0011, R2.
  7. GT Exhaust System - Expansion Joints and Silencers
    1. Expansion joint (HRSG inlet): quantity 2 for GTG #1A and #1B; axial compression movement 120 mm, axial extension movement 10 mm, lateral movement 110 mm; MOC inlet frame IS 2062 Gr. B, outlet frame SA 387 Gr. 12, fabric element UFV-100; reference documents drg no. J-0787-07-0000, R4 (2 sheets).
    2. Expansion joint (diverter damper inlet): quantity 2 for GTG #1A and #1B; axial compression movement 40 mm, axial extension movement 10 mm, lateral movement 10 mm; MOC inlet frame IS 2062 Gr. B, fabric element UFV-100; reference documents drg no. J-0787-01-0000, R3 (2 sheets).
    3. Expansion joint (diverter damper outlet towards stack): quantity 2 for GTG #1A and #1B; axial compression movement 30 mm, axial extension movement 10 mm, lateral movement 10 mm; MOC inlet frame IS 2062 Gr. B, fabric element UFV-100; reference documents drg no. J-0787-02-0000, R3 (2 sheets).
    4. Silencer transition (sq. to sq.) and (sq. to round): quantity 2 for GTG #1A and #1B; MOC shell plate IS 2062 Gr. B, insulation cover SS 409; reference documents drg no. J-0787-08-0000, R3 (2 sheets), drg no. J-0787-10-0000, R2 (2 sheets).
    5. Exhaust silencer: quantity 2 for GTG #1A and #1B; MOC main frame IS 2062 Gr. B, insulation cover SS 409; reference documents drg no. J-0787-09-0000, R3 (3 sheets).
    6. Bypass stack: quantity 2 for GTG #1A and #1B; MOC shell plate IS 2062 Gr. B, insulation cover SS 409; reference documents drg no. J-0787-11-0000, R2 (3 sheets).
  8. HRSG Performance Parameters
    1. Manufacturer: Larsen & Toubro Limited.
    2. Type of boiler: vertical induced circulation.
    3. Max. continuous rating (MCR): HP circuit - 221 tonnes/hr, IP circuit - 38 tonnes/hr, LP circuit - 38.85 tonnes/hr.
    4. Steam temperature at terminal point: HP circuit - 528 °C, IP circuit - 324 °C, LP circuit - 223 °C.
    5. Steam pressure at terminal point: HP circuit - 112.7 bar, IP circuit - 23.70 bar, LP circuit - 4.5 bar.
  9. HRSG HP Drum
    1. Brand: ISGEC, Yamunanagar.
    2. Quantity: 1 for HRSG A, 1 for HRSG B.
    3. Construction code: