1.      Manufacturing

   The gas turbine generating set is produced under Manufacture

   Associate Agreement with GE Company of USA. The compressor- turbine rotor, stator vane of compressor, turbine nozzles, combustion system and Speedtronic Mark V control panel as well as drawings are provided by GE. The generator is licensed from Brush Electrical Machines Ltd. of UK.

 

2.  Structure

   PG6581B gas turbine generating set is a package unit and can be installed for outdoor operation. It is composed of four blocks i.e. the gas turbine and accessories compartment, control compartment, load gear box enclosure and generator compartment.

   The control panel of gas turbine, control panel and protection panels of generator, motor control center ( M.C.C. ) are located in the control compartment. Neutral point and outgoing leads cabinet are situated at each sides of the generator compartment. The whole unit is furnished with necessary ventilation, lighting and fire-fighting system. There is air conditioners in the control compartment.

 

1.    Technical Specification.

3.1 Base load ( ISO condition ) ( guaranteed value )

                                      Distillate oil  Natural gas

   Output                   kW          40950       41890

   Heat rate                 kJ/kW.h       11342       11247

   Inlet temp. of turbine       ^oC            1140        1140       

   Exhaust temperature        ^oC            544         546

   Exhaust gas flow        kg/h x10^x3        526         525

   Note:  above performance is measured at generator terminals and 

   includes allowances for the effects on shaft driven auxiliaries, and

   2.55 in H2O ( 6.48 mbar ) inlet and 2.52 in H2O ( 6.4 mbar ) exhaust

   pressure drops and a NON DLN combustors.  

 

3.2   Performance correction on the non-ISO conditions.

3.2.1 Altitude correction on curve 416HA662 Rev A.

3.2.2 Ambient temperature correction on curve 544HA876-2 Rev 0 and 544HA875-2Rev 0.

 

3.2.3 Effect of modulating IGV’s on exhaust temperature and flow on       

     curve 544HA876-3Rev 0.and 544875-3 Rev.0

3.2.4 Humidity correction on curve 498HA697 Rev B.

3.2.5 Effect on pressure drop.

l       Air inlet pressure loss increase every 996 Pa, results an output

   decrease of 1.50%, and a heat rate increase of 0.50%, exhaust  

   temperature increase 1.2 ^oC.

l       Exhaust pressure loss increase every 996 Pa, results an output decrease of 0.50%, and a heat rate increase of 0.50%, exhaust temperature increase of 1.2 ^oC.

3.2.6 NOx emission

     168 ppmVD  for natural gas

     327 ppmVD  for distillate oil

3.2.7 Noise

     93 dB (A) at 1m from each machine

 

 

3.4 Generator

    Type:                               QFR-38-2

    Output:                              38000 kW 

    Voltage:                              10500 V

    Current:                              2611.8 A

    Frequency:                            50 Hz

    Power factor:                          0.8

    Speed:                                3000 rpm

    Efficiency:                            97.7%

    Protection type:                        IP 44

    Synchronous reactance (saturated):         247%

    Transient reactance (saturated):            22%

    Sub-transient reactance (saturated):         14.8%

    Negative sequence reactance (saturated):     19%

    Short circuit ratio:                     â‰?.46

    Insulation class:                         F

    Connection:                            Y

    Cooling mode:                         CACW

    Cooling temperature                     32â„?/DIV>