| Hydrogen-Cooled
SGen-2000H seriesSGen-2000H series
SGen-2000H series / Hydrogen-Cooled
Hydrogen-cooled generators are used for
rating up to 600 MVA for simple cycle,
combined cycle and steam power plants.
This increased capability is due to better
heat transfer and lower density characteristics
of hydrogen compared to air.
Also, the generator is completely sealed
and thus more appropriate in environment
that might have detrimental effects on
an air-cooled generator.
Technical features
Typically smaller in size and more
efficient than equivalently rated air
cooled model
Not prone to contamination by dirt,
oil and humidity
Hydrogen and seal oil supply system
to facilitate installation and maintenance
Bearing brackets and shaft seals arranged
to minimize H? leakage
Frame arranged for ease of alignment
and foundation loading
Spring mounted stator to minimize vibration
transmission to foundation
Pre-stressed, non-magnetic, through
bolts minimize the need for maintenance
and
re-tensioning of the core
Stator
bar tightness is maintained with pre-stressed
ripple springs or Global Vacuum Pressure
Impregnation to avoid mechanical and electrical
degradation
Stator end windings surrounded by a
compact support ring, made of glass-fiber,
to provide radial support Indirectly
or directly cooled stator windings, depending
on MVA rating, to minimize machine size
Directly cooled rotor windings for
high current (MVA) capability
|
