58500 kW 13800 Volts 60 Hz Combined Cycle Power Plant

Description

FR-6B combined cycle power plant with 1 x FR6B gas turbine, 1 x HRSG and 1 x steam turbine generator set.

Plant performance:
- Ambient temperature: 48°F
- Fuel: natural gas
- Gross output: 58,500 kW
- Plant heat rate: 8,900 BTU/kWh

Gas turbine generator set:
Gas turbine:
- Manufacturer: General Electric
- Model number: PG6541B
- Type: Continuous
- Packaged by: GE
- Packager model number: 6A1PB148-1
- Rating (base/peak): 42,400 kW
- Inlet temperature: 48°F
- Speed: 5,100 rpm

Gear reducer:
- Manufacturer: Westech
- Rating: 68,000 HP
- Speed: 5,100/3,600 rpm

Generator:
- Manufacturer: General Electric
- Type: Tewac
- Rating: 46,500 kVA
- Voltage: 13,800 V, 3 phase, 60 Hz
- Speed: 3,600 rpm
- Power factor (PF): 0.9
- Armature current: 1,845 amps
- Insulation class: F/F (Stator/rotor)

Control: Mark IV Speedtronic
Black start: diesel engine
Fuel: natural gas
NOx control: steam injected
Year built: 1992
Shutdown: Still connected
Total lifetime hours: 46,200
Hours since last major overhaul (2007): 1,000 hours

HRSG:
- Manufacturer: Zurn
- Type: dual pressure
- Steam flow:
- HP superheated steam: 900 PSIG / 900°F, 147,726 lbs/hr
- LP saturated steam: 185 PSIG / 384°F, 24,623 lbs/hr

Steam turbine generator:
- Manufacturer: GE
- Rating: 16,500 kW
- Pressure, temperature, flow:
- Inlet steam: 900 PSIG, 900°F, 132,000 lbs/hr
- Controlled steam: 180 PSIG, 0 to 80,000 lbs/hr
- Exhaust steam: 2" HGA, 137,400 lbs/hr
- Rating with zero extraction: 16,500 kW
- Steam rate: 8.00 lbs/kWh
- Speed: 5,362 rpm
- Inlet steam size: 10"
- AE steam size: 8"
- Uncontrolled steam size: 6"
- Exhaust steam size: 75"
- Governor: Woodward 505E

Generator:
- Manufacturer: GE
- Rating: 18,333 kVA
- Voltage: 13,800 V, 3 phase, 60 Hz
- Power factor: 0.9
- Speed: 1,800 rpm
- Armature current: 767 amps
- Exciter: brushless, PMG
- Type: Tewac

Condenser:
- Surface area: 16,619 sq ft
- Water flow: 15,947 GPM
- Cooling water inlet temperature: 75°F
- Cooling water outlet temperature: 92°F

History of steam turbine generator:
- Installed in 1990
- Approximately 50,000 hours

Water treatment system

Powerhouse building with 15 ton and 20 ton cranes

115 kV substation, 13.8 kV switchgear, 4,160 V motor starters, 480 V MCC, battery and battery charger, UPS.

Plant history:
- Start-up 1992 and operated until 1998; after this date, the plant ran as peak standby only.