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Siemens, SGT5-2000E, 2012, Combined Cycle Power Plant, 223.3 MW Each, 50 Hz, Natural Gas

Siemens, SGT5-2000E, 2012, Combined Cycle Power Plant, 223.3 MW Each, 50 Hz, Natural Gas Sold

Description

  1. Overview
    1. Siemens SGT5-2000E gas turbines in a combined cycle power plant configuration: natural gas-fired gas turbine with steam turbine and steam turbine alternator
    2. Year: 2012
    3. Quantity: 3 units
    4. Hours: zero
    5. Fuel: natural gas
    6. Dry low emission
    7. Assembly status: not fully assembled
  2. Power and Electrical, Each Unit
    1. Gas turbine power: 166 MW
    2. Steam turbine power: 57.3 MW
    3. Total power of each unit: 166 MW + 57.3 MW = 223.3 MW
    4. Voltage: 10.5 kV
    5. Frequency: 50 Hz
    6. 60 Hz conversion: not available
  3. Scope of Supply, Each Unit
    1. Gas turbine
    2. Alternator (gas turbine generator)
    3. Cooler
    4. Lube oil system
    5. Added gas
    6. Water treatment
    7. Steam tank
    8. Steam turbine
    9. Heat recovery steam generator (HRSG)
    10. Steam turbine alternator
    11. Chimney
    12. Tube
    13. Fire-fighting system
    14. Transformer
    15. Control system
    16. High-voltage cabinet
    17. Low-voltage cabinet
    18. Motor control center (MCC)
    19. HV compartment
    20. Soundproofing
  4. Main Component Nameplate Data
    1. Heat recovery steam generator (HRSG): model NG-2000E-R1, Hangzhou Boiler Group, Nooter/Eriksen technology
    2. HRSG high-pressure steam: 215.5 t/h at 7.05 MPag and 517.1 °C; maximum allowable working pressure 8.21 MPag
    3. HRSG low-pressure steam: 46.5 t/h at 0.6 MPag and 214 °C; maximum allowable working pressure 0.896 MPag
    4. HRSG inlet flue gas: 1,780.3 t/h at 538.2 °C and 5.394 kPa
    5. Main power transformer: Siemens SFP-200000/220, 200 MVA, 50 Hz, YN,d11, ODAF cooling, manufactured September 2012
    6. Main power transformer voltages: HV 242,000 V (taps 254,100-229,900 V), LV 18,000 V; LV current 6,415.0 A
    7. Main power transformer weights: total 167,500 kg, oil 34,800 kg, transport 121,000 kg
  5. Gas Turbine Package Documentation (Siemens SGT5-PAC 2000E)
    1. Package documentation covers the gas turbine package: gas turbine, auxiliary and mechanical systems, electrical equipment (static excitation equipment SEE and static frequency converter SFC) and control system
    2. Typical arrangement shown: SGT5-PAC 2000E gas turbine package for operation with natural gas as main fuel
    3. Package documents: design conditions, media requirements, gas turbine island layout (plan view and section A-A), turbine control system configuration, gas turbine island electrical single line diagram, and large component transport list
  6. Design Conditions: Plant Operation
    1. Fuel type: natural gas
    2. Start-up capable: yes; shutdown capable: yes
    3. Load regime: base load
    4. Maximum operating hours: 8,000 per year
    5. Maximum starts: 40 per year
    6. Design life, gas turbine: 100,000 equivalent operating hours (EOH) or 3,000 starts, whichever occurs first
  7. Design Conditions: Electrical and Grid
    1. Grid frequency, nominal: 50 Hz
    2. Grid frequency range, continuous operation: 47.5-51.5 Hz
    3. Grid frequency range, limited operation: 47.0-47.5 Hz and 51.5-52.0 Hz (maximum 20 seconds per occurrence and maximum 30 minutes accumulated)
    4. Power factor, gas turbine generator: 0.85 lagging
    5. Allowable generator voltage deviations with simultaneous grid frequency deviations based on IEC 60034-3
    6. Primary frequency response (PFR) and secondary frequency response (SFR) operation considered, with the gas turbine heat-soaked, on fuel gas only, and with limited load gradient and load range
    7. Grid sustaining fulfilled in principle; fault clearance times larger than 150 ms excluded; auto re-closing excluded
    8. Load rejection to house load considered
    9. Island operation at house load considered
    10. Peak load (operation beyond base load): not provided
  8. Design Conditions: Gas Turbine Load Gradients
    1. Loading after grid connection: normal 11 MW/min, fast 15 MW/min
    2. Unloading until grid disconnection: normal 11 MW/min
    3. Load gradients valid per gas turbine between the initial load step after grid connection and 97% of rated power
  9. Reference Design Conditions: Site and Environment
    1. Site level: approximately 10 m above sea level
    2. Indoor ambient air temperature: minimum 5 °C, maximum 45 °C
    3. Outdoor ambient air temperature: minimum -14.9 °C, maximum 38.7 °C
    4. Outdoor ambient air relative humidity: minimum 56%, maximum 68%
    5. Outdoor ambient air absolute humidity: maximum 25 g/m3
    6. Indoor arrangement of the equipment
  10. Fuel Gas (Natural Gas at Terminal Point 14A)
    1. Lower Wobbe index (LWI): design 48.2 MJ/m3 STP, permissible range 47.3-49.2 MJ/m3 STP
    2. Pressure: minimum operational 22.12 bar(g) at 20 °C fuel temperature, maximum operational 31 bar(g), maximum design limit 31 bar(g)
    3. Temperature: minimum 15 °C and dew point +28 K
    4. Mass flow: maximum 12.90 kg/s
    5. Pressure tolerance: ±5.0% of design value at 0-15% of maximum fuel flow, ±2.5% at 15-100%; change rate dp/dt ≤0.2 bar/s
    6. Temperature permissible range: 5 °C to 60 °C (LHV 35.0-50.0 MJ/kg) or 5 °C to 120 °C (LHV 40.0-50.0 MJ/kg); tolerance ±10 K; change rate dT/dt ≤1 K/s
    7. Condensation point: minimum 10 K above the dew point of the gas mixture and 15 K above the dew point of water
    8. Lower heating value (LHV): design range 35.0-50.0 MJ/kg, tolerance ±5.0%, change rate ≤0.1%/s
    9. Lower Wobbe index permissible range: 40.3-51.0 MJ/m3 STP, tolerance ±5%, change rate ≤0.1%/s
    10. Composition limits: CH4 ≥80 vol.%, C2H2 ≤0.1 vol.%, C2H6 ≤15 vol.%, CnHm (n ≥2, excluding C2H6) ≤10 vol.%, H2 ≤1.0 vol.%, N2 + Ar + CO2 ≤20 vol.%, O2 ≤0.1 vol.%
    11. Contaminant limits: dust ≤20 ppm(wt) (d ≤2 µm ≤18.5, 2-10 µm ≤1.5), Na + K ≤0.5 ppm(wt) (fuel factor 1.0) or ≤1.0 ppm(wt) (fuel factor 1.5), Ca ≤10.0 ppm(wt), V ≤0.5 ppm(wt), Pb ≤1.0 ppm(wt), H2S ≤10 ppm(vol), total sulfur ≤20 ppm(wt)
    12. Natural gas flow metering system (turbine flow meter) for performance testing, at fuel gas temperature ≤60 °C
  11. Cooling Water, Air and Washing Water
    1. Closed cooling water pressure: minimum 8 bar(g), operation 10 bar(g), maximum 12 bar(g)
    2. Closed cooling water temperature: design 28 °C, maximum 38 °C
    3. Closed cooling water: demineralized water per VGB M 407 (conductivity <0.080 µS/cm, silica <0.010 mg/l, sodium <0.005 mg/l, DOC <0.200 mg/l), treated with carbohydrazide (conductivity <30 µS/cm, pH 7.0-9.3, carbohydrazide 1.0-5.0 mg/l)
    4. Compressor intake air: total dust ≤0.08 ppm(wt), dust 2-10 µm ≤0.02 ppm(wt), absolute filter mesh size 10 µm
    5. Compressor cleaning: offline and online washing with de-ionized water
  12. Lube and Hydraulic Oil
    1. Lube oil: turbine oil ISO VG 46, kinematic viscosity 41.4-50.6 mm2/s at 40 °C, viscosity index ≥90, flash point >200 °C, pour point ≤-6 °C, aging ≥3,000 h
    2. Turbine oil thermal stability: up to 110 °C in machine components and up to 80 °C in the oil tank
    3. Hydraulic oil: grade HLP 46 per DIN 51524 Part 2 / ISO-L-HM 46 per ISO 6743-4, kinematic viscosity 41.4-50.6 mm2/s at 40 °C, flash point >185 °C, pour point ≤-15 °C, up to +70 °C in the hydraulic oil tank
  13. Gas Turbine Island Equipment (per Layout Drawing)
    1. Gas turbine
    2. Generator for gas turbine
    3. Base module, lube oil, with hydraulic skid, oil vapour extractor, hydraulic clearance optimization and fuel gas supply system
    4. Enclosure for fuel gas system
    5. Air intake filter house and duct, with transport box for filter elements
    6. Exhaust gas system (diffuser)
    7. Advanced compressor cleaning skid
    8. Start-up unit transformer
    9. Exciter transformer
    10. Air dryer package
    11. Noise protection walls for gas turbine and noise protection for combustion chambers
    12. Enclosure for intermediate shaft
    13. Generator neutral point cubicle
    14. Generator current transformer terminal box
    15. Shaft voltage and current measurement box
    16. Local fire alarm panel
    17. Space for generator rotor removal, monorail for bearing (2 t) and gas turbine rotor unloading / upending device
  14. Electrical System (per Single Line Diagram)
    1. Gas turbine generator: Siemens SGen5-100A-2, 15.75 kV ±5%, 50 Hz, cos φ = 0.85
    2. 110 kV grid connection via generator transformer
    3. Generator circuit breaker and isolated phase busduct (IPB)
    4. Gas turbine 10.5 kV unit switchgear, 3-phase 10.5 kV 50 Hz
    5. Transformer 2,900 kVA, 10.5 ±2x2.5% / 2.5 kV, Dy5, uk = 8%
    6. Transformer 1,450 kVA, 10.5 ±2x2.5% / 0.7 kV, Dy5, uk = 6%
    7. Neutral grounding transformer with loading resistance, 135 kVA / 20 s
    8. Gas turbine 400 V LV switchgear and 400 V LV essential switchgear, 3/N/PE 400 V 50 Hz, 50 kA 1 s
    9. 220 V DC battery, 220 V DC battery charger and 220 V DC switchgear
    10. Uninterruptible power supplies (UPS 1 and UPS 2)
    11. SEE/SFC cubicle (SFC 4.0), SFC transformer and SEE transformer
    12. Power control center (PCC)
  15. Control System (per I&C Overview)
    1. Siemens Energy turbine control system SPPA-T3000
    2. SPPA-T3000 automation cabinets and ET200 SPHA
    3. SPPA-T3000 LAN cabinet with application server, time server (GPS) and LAN equipment
    4. Operator terminals, engineering terminal, color and black laser printers
    5. Firewalls and CAG router
    6. Hardwired signal interface and serial (OPC) signal interface to the plant DCS
    7. LAN interface to broadband telecom system
    8. 230 V AC UPS
  16. Large Components, Gas Turbine Part (Single Unit): Qty, L x W x H (m), Weight per Piece (t)
    1. Gas turbine: 1, 10.34 x 4.12 x 4.05, 211
    2. Silo combustor: 2, 7.30 x 3.34 x 4.30, 27.6
    3. Base module: 1, 10.80 x 3.80 x 3.70, 22.0
    4. Duct lower part: 1, 12 x 1.8 x 3, 9.0
    5. Duct upper part: 1, 11.4 x 2.1 x 3, 8.5
    6. Intake duct flap: 1, 14 x 2.3 x 1.0, 9
    7. Duct expansion joint: 1, 10 x 2.3 x 0.5, 0.8
    8. Duct intermediate piece: 1, 11.5 x 1.8 x 3, 6.5
    9. Duct transition piece: 1, 11.5 x 1.9 x 1.7, 6.5
    10. Air intake elbow: 2, 11.6 x 2.4 x 2.9, 6.3
    11. Silencer casing: 1, 10 x 4 x 1.5, 15
    12. Filter house support structure: 2, 14 x 2.3 x 1.5, 12.5
    13. Plenum: 1, 8.7 x 3.1 x 2.7, 8.1
    14. Plenum: 1, 10.4 x 2.5 x 2.3, 9.4
    15. Plenum: 1, 13.5 x 2.4 x 3, 3.2
    16. Turbine exhaust manifold: 1, 5.6 x 4.2 x 4.7, 10.5
    17. Diffuser segments: 2, 10.8 x 3.1 x 2.8, 21