Upload
truongkhanh
View
229
Download
6
Embed Size (px)
Citation preview
DdG Equipment di Renzo MEYER - P. I.V.A.: 03687600985 - Nr. REA: BS 554492
Via Scavi Romani, 3- 25105 - Desenzano del Garda - (Brescia) – Italy
93 MWe natural gas fired Combined Cycle Power Plant
1. Power Plant General Description
This is a Combined Cycle Cogeneration Power Plant (CCCPP) located in (Milan) able to supply about 30
t/h of surplus steam at 80 bar/520°C (50 t/h with post-firing) for any technological application over and
above 93 MW of electric power output.
It was first synchronized in October 1997 and entered into commercial operation on February 1998; last
full load operation was in March, 8th, 2011.
As a single-shaft line, it is mainly composed by:
� one (1) General Electric MS6001FA gas turbine (Frame 6FA)
� one (1) Heat Recovery Steam Generator (HRSG) producing steam at two different
pressure levels (80 and 3 bar)
� one (1) General Electric condensing steam turbine, with steam extraction
� one (1) General Electric generator, connected both to gas and steam turbine
The step up transformer is provided with three windings since the original design foresees the
predisposition to add a second steam turbine with its own generator.
DdG Equipment di Renzo MEYER - P. I.V.A.: 03687600985 - Nr. REA: BS 554492
Via Scavi Romani, 3- 25105 - Desenzano del Garda - (Brescia) – Italy
2. Performances and emissions
The following table summarizes the main figures of the Combined Cycle Cogeneration Power Plant
CCPP nominal Gross Output MWe ≈ 93
Gas Turbine nominal power MWe ≈ 70
Steam Turbine nominal power MWe ≈ 23
Surplus Steam at 80 bar / 520°C t/h ≈ 30
Surplus Steam with post-firing t/h ≈ 50
The Power Plant complies with the following emission limits (referred to 15% O2):
NOx emissions mg/Nmc @ 15% O2 50
CO emissions mg/Nmc @ 15% O2 50
3. Main equipment list
The following table summarizes the key data for the main items of the plant with relevant running hours:
Equipment Manufacturer Model Running hours
GT General Electric MS 6001FA 87.913
ST Nuovo Pignone HNK 50/90-3 87.913
Generator General Electric 7AG 87.913
Gas compressors Nuovo Pignone 2 x 2HM/1 37.795 / 48.791
HRSG Henry Vogt 49 87.913
Step-up transformer
11,5�132 kV ABB 112 MVA + 29 MVA
DdG Equipment di Renzo MEYER - P. I.V.A.: 03687600985 - Nr. REA: BS 554492
Via Scavi Romani, 3- 25105 - Desenzano del Garda - (Brescia) – Italy
4. Boffalora Power Plant General Layout
DdG Equipment di Renzo MEYER - P. I.V.A.: 03687600985 - Nr. REA: BS 554492
Via Scavi Romani, 3- 25105 - Desenzano del Garda - (Brescia) – Italy
5. Gas Turbine
The following table summarizes Gas turbine’s main figures:
Manufacturer # General Electric / NP
Model # MS6001FA (Frame 6FA)
Serial number # 296828
1st synchronizing # October 1997
Fuel # Natural Gas
Power output @ ISO cond. MWe 75,9
Heat rate @ ISO cond. kJ/kWh 9.760
Speed rpm 5231
Control System # GE Speedtronic Mark V
Starting device # Generator driven
Air Compressor type # Axial, regulating IGV
Compressor stages # 18
Turbine stages # 3
Combustion chambers # 6
NOx reduction system # DLN2
Fuel gas pressure Bar 26÷29
Gearbox Manufacturer # Renk Tacke
Gear Speed ratio rpm 5.500/3.000
Lube oil system # Common to Gas and ST
The Gas Turbine was covered by a Long Term Service Agreement (LTSA) with OEM till the end of
operation (up to 2012).
Several Gas Turbine’s Capital spare parts are available.
Major Inspection was performed at 48.000 OH , in 2003; next Major Inspection is planned at 96.000 OH.
DdG Equipment di Renzo MEYER - P. I.V.A.: 03687600985 - Nr. REA: BS 554492
Via Scavi Romani, 3- 25105 - Desenzano del Garda - (Brescia) – Italy
Gas Turbine Case
Combustion Chambers
DdG Equipment di Renzo MEYER - P. I.V.A.: 03687600985 - Nr. REA: BS 554492
Via Scavi Romani, 3- 25105 - Desenzano del Garda - (Brescia) – Italy
Gas Turbine Speed Reducer Gearbox
Gas Turbine Inlet Air Filter
DdG Equipment di Renzo MEYER - P. I.V.A.: 03687600985 - Nr. REA: BS 554492
Via Scavi Romani, 3- 25105 - Desenzano del Garda - (Brescia) – Italy
6. Heat Recovery Steam Generator
Heat Recovery Steam Generator is HENRY VOGT make; installed downstream of the exhaust duct of the
Gas Turbine, it receives the hot flue gas from the Gas Turbine itself and produces steam at two different
pressure levels.
License # Henry Vogt Machine Co. (USA)
Designer # MIR (Italy)
Manufacturer # COMEF (Italy)
Manufacture Year # 1997
Type # Water tubes, horizontal gas flow,
natural circulation
HP section # Economizer, Evaporator, Superheater
HP steam pressure Barg 83
HP steam temperature °C 523
HP steam flow t/h 106,7
HP flow with Post-firing t/h 135
LP section # Economizer, Deareator, Evaporator, SH
LP steam pressure Barg 3
LP steam temperature °C 191
LP steam flow t/h 18,6
Post-firing Manufacturer # De Jong-Coen
Post-firing Fuel # Gas
Steel Stack m 50 (h)
BMS manufacturer # Hartman & Braun
DdG Equipment di Renzo MEYER - P. I.V.A.: 03687600985 - Nr. REA: BS 554492
Via Scavi Romani, 3- 25105 - Desenzano del Garda - (Brescia) – Italy
Heat Recovery Steam Generator
DdG Equipment di Renzo MEYER - P. I.V.A.: 03687600985 - Nr. REA: BS 554492
Via Scavi Romani, 3- 25105 - Desenzano del Garda - (Brescia) – Italy
7. Steam Turbine
The Steam Turbine is manufactured by General Electric / Nuovo Pignone.
Turbine is provided with turning gear and SSS Gears make clutch allowing connection/disconnection
between the Turbine itself and the Generator.
Steam Turbine Major Inspection was perfo0rmed in 2009.
Manufacturer # General Electric /
Nuovo Pignone
Model # HNK 50/90-3
1st synchronizing # October 1997
Power output Mwe 23,05
Inlet steam pressure HP Bar 82
Inlet steam temperature HP °C 515
Inlet steam pressure LP Bar 2,2
Inlet steam temperature LP °C 191
Condensing pressure Bar 0,06
Turbine Speed rpm 3.000
Steam Condenser # Surface type /
Water cooled
Condenser Manufacturer # Wellman Graham
Condensing Tubes Material # A249 TP 304L
DdG Equipment di Renzo MEYER - P. I.V.A.: 03687600985 - Nr. REA: BS 554492
Via Scavi Romani, 3- 25105 - Desenzano del Garda - (Brescia) – Italy
Turbine Discharge Case Local Instrument Panel
DdG Equipment di Renzo MEYER - P. I.V.A.: 03687600985 - Nr. REA: BS 554492
Via Scavi Romani, 3- 25105 - Desenzano del Garda - (Brescia) – Italy
Water cooled Steam Condenser
DdG Equipment di Renzo MEYER - P. I.V.A.: 03687600985 - Nr. REA: BS 554492
Via Scavi Romani, 3- 25105 - Desenzano del Garda - (Brescia) – Italy
8. Synchronous Generator
Generator last inspection (including visual and borescope inspection, polarization index, insulating
resistance test and stator winding resistance) was performed in 2009.
Manufacturer # General Electric
Model # 7AG
Power output MVA 110
Power Factor Cos-fi 0.85
Cooling System # Air to Water Cooled
Speed Rpm 3.000 (2-pole)
Frequency Hz 50
Rated Voltage V 11.500
Rated Current A 5.522
Insulation Class # F
Excitation type # Static
Excitation Model # EX2.000 – General El
Generator Starter # Static type
Static Starter Model # Directo-Matic 2.000
General Electric
Air insulated bus ducts downstream Generator
DdG Equipment di Renzo MEYER - P. I.V.A.: 03687600985 - Nr. REA: BS 554492
Via Scavi Romani, 3- 25105 - Desenzano del Garda - (Brescia) – Italy
9. Fuel Gas Compression Station
Gas Compressors have been overhauled in 2010.
Compressors Manufacturer # Nuovo Pignone
Number of Units # 2 (1 duty, 1 stand-by)
Model # 2HM/1
Type # Reciprocating
Rated Flow Rate Nmc/h 22.750
Design Press. (inlet/outlet) Bar g 16 / 29
Design Temp. (inlet/outlet) °C 20 / 65
Speed Rpm 740
Mechanical Power kW 500
Regulation Steps % 0-50-75-100
Electric Motor Manufact. # ABB
Motor Voltage V 6.300, 3-phase
Motor Cooling System # Water
Motor Lube System # Upgraded to oil free
DdG Equipment di Renzo MEYER - P. I.V.A.: 03687600985 - Nr. REA: BS 554492
Via Scavi Romani, 3- 25105 - Desenzano del Garda - (Brescia) – Italy
Gas Compression Station
DdG Equipment di Renzo MEYER - P. I.V.A.: 03687600985 - Nr. REA: BS 554492
Via Scavi Romani, 3- 25105 - Desenzano del Garda - (Brescia) – Italy
10. Step-Up Transformer
Generator is connected, via an air-insulated bus duct, to a three windings Step-Up transformer, ABB
make. Third winding (MV2) is available for a future expansion, to be connected to the generator of a
second steam turbine.
Transformer Make # ABB
Manufacture Year # 1996
Number of Units # 1
Manufacture Year # 1997
Installation # Outdoor
Windings # 3-phase (1 primary HV; 2 secondary MV)
Frequency Hz 50
Voltage level (HV) kV 139.8 +/- 8x1.25%
Voltage levels (MV1-MV2) kV 11.5
Rated Power (HV/MV1/MV2) MVA 141.5 / 112 / 29.5
Rated Current (HV/MV1/MV2) A 584,4 / 5.623 / 1.481
Connection groups # YN-d11-d11
Cooling Type # Onaf