( Item # = PG0160 ) TWO FRAME 5 PG 5251 M – 17 ,750KW  50Hz GAS TURBINE GENERATORS

 TWO REBUILT FRAME 5 PG 5251 M – 17 ,750KW  50Hz GAS TURBINE GENERATORS -  - Turbine : - Speed : 5100 rpm - Axial compressor: 16 stages - Compression ratio : 7 - Fuel : natural gas - Natural gas pressure at the turbine inlet : 7 bars - Outlet gas : 350 t/h - 520°C - 1,04 bar - Specific consumption : 3400 kcal/kWh -- Generator : - Tension : 10 300 V +/- 10% - Intensity : 1226 A - Speed : 3000 rpm - Apparent power: 21875 kVA (c’est-à-dire P=21875 x 0,8=17.750MW) - Stator temperature : 120 °C - Rotor temperature : 130°C - Insulation : classe B - Cos Æ: 0.8 - 50 Hz - Protection : hooded - Excitation : static with turning diodes 191V – 420A

1. GENERALITIES

The Frame 5 package is a compact generator station with combustion turbine, consisting of 4 main operational subassemblies and all necessary auxiliaries.
The four main components are :
? control skid,
? turbine and auxiliaries skid,
? generator skid,
? electrical distribution system skid.
The control, turbine and auxiliaries, and generator skids are located in weatherproof compartments.
 

2. TECHNICAL DESCRIPTION

2 FRAME 5 Outdoor Packages - Alstom PG 5251 M

Control skid
Dimensions : (L) 3,20 m  x (W) 3,20 m  x (H) 3,85 m
Weight : approx 9 tons

Turbine and auxiliaries skid
Dimensions : (L) 11,70 m  x  (W) 3,20 m  x  (H) 3,85 m
Weight : approx 8 tons
Starting electrical engine : 258 kW – 340 V / 480 A

Turbine
o Speed : 5100 rpm
o Axial compressor: 16 stages
o Compression ratio : 7
o Fuel : natural gas
o Natural gas pressure at the turbine inlet : 7 bars
o Outlet gas : 350 t/h  -  520°C  -  1,04 bar
o Specific consumption : 3400 kcal/kWh

Generator skid
Dimensions : (L) 10 m  x  (W) 3,20 m  x  (H) 3,85 m
Weight : approx 78 tons

Generator
o Tension : 10 300 V  +/- 10%
o Intensity : 1226 A
o Speed : 3000 rpm
o Apparent power: 21875 kVA (c’est-à-dire P=21875 x 0,8=17,5MW)
o Stator temperature : 120 °C
o Rotor temperature : 130°C
o Insulation : classe B
o Cos ?: 0.8  - 50 Hz
o Protection : hooded
o Excitation : static with turning diodes 191V – 420A
 
 

LIFE RECORD OF MACHINES
 

 Unit 1 Unit 2
Commissioning May 1973 November 1973
Number of starts ? 4 200 ? 4 800
Number of running hours ? 144 000 ? 141 200
Shutdown of the machines End of 1999 End of 1999
Last major inspection July 1995 December 1992
Number of running hours since last change of
IGV 1 ? 12 800 h ? 3 500 h
IGV 2 ? 12 800 h ? 3 500 h
HP blades ? 26 300 h ? 30 700 h
BP blades ? 12 800 h ? 11 600 h
IGV valves ? 12 800 h ? 30 700 h

The machines have been maintained by the Manufacturer strictly according to the Maintenance Program scheduled for this type of equipment.
The few running hours of the main parts will give these machines potentially long working time before programming their replacement.
 

REVAMPING

Each unit will be completely overhauled :

? turbine auxiliaries overhauling,
? inspection of turbine compressor,
? turbine inspection,
? supply of consumables needed for inspections (screws, nuts, joints, thermocouples) with the exclusion of hot gas path parts,
? inspection and checking of generator,
? replacement of present monitoring system (Speedtronic Mark I) by a new generation one,
? overhauling of package enclosures,
? supply of one standard stack (diverter, silencer and baffles ; maximum height = 6m).
? supply of new air coolers
? supply of a new filtration case which must be adapted to each site running conditions (case position, atmospheric conditions, choice of the filtration system)
? modernization of the existing fire protection system

Upon special request, the revamping will also include :
? the supply of up/down tension transformer to be defined according to the new running conditions,
? the supply of one gas compression/expansion unit for fuel feeding the turbine,
? any other modification or updating of the equipment and not scheduled in the revamping or the supply of goods.