WORLD'S BIGGEST AIR COOLED TURBO GENERATOR

Air-cooled technologies : Recent key facts

WORLD'S LARGEST TURBOGENERATOR IN OPERATION:

  1980-1990: Constant air cooled generator technology evolution from 100 to 200 MW

  1990-1995 : Development and market introduction of 250 MW class air-cooled generator.

 1995-2000 : Development and tests of 300-400 MW class air-cooled generator, to anticipate the large GT's and combined cycle development

 

TOPAIR 25 Generator : MAIN FEATURES

 Basic design based on experience and proven technologies

 Stator insulation : Single bar VPI (Micadur / Class F +(155°C)

 Stator cooling : Indirect / Multichamber cooling

 Rotor cooling : Direct / Axial with subslots

 Larger output achieved by sizes increase : (D+7% L+17%)

 Linear current density (up to +20%) tanks to the following features

 Reverse cooling (6 air coolers just after fans : 17K enefits)

  

External air by-pass and air mixer at cooler outlet

 Rotor air inlet guide vanes

 

 

TOPAIR 25 type :

Rated output : 400 MVA

Power factor : 0,85

Active power : 340 MW

Voltage : 21 kV

Cooling : AIR

Excitation : Static

Operation : IEC Class B

 

MAIN DATA:

TYPE TEST:

Rated output : 500 MVA

Power factor : 0,85

Active power : 425 MW

Rated temperature : 40°C

Voltage : 23 kV

Cooling : AIR (TEWAC)

Operation : IEC Class F 155°C

MEAN & HOT SPOTS:

Efficiency : 98.78 %

Short Circuit Ratio : 0.432

Noise level at 1m : 89.5 dBA