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Processes >
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LNG Production >
E-LNG >
Power generation
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Water-steam cycles
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Steam turbines
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Synchronous generators
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Power transmission and distribution
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Stability
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Power generation - Synchronous generators
The E-LNG concept promises superior overall efficiency.
Employing proven technology, Siemens generators effectively
live up to that promise. Turbine torque is converted
to electric power in directly coupled standard air/watercooled
SGen 100A-2P two-pole synchronous generators
with static excitation. More than 500 of these type-tested
machines have been built in the past decades. They produce
up to 165 MW at either 50 or 60 Hz, at a voltage level of
typically 11 or 13.8 kV.
Proving their credentials
every day in
more than 500 industrial
and utility powergeneration
facilities
around the world,
Siemens synchronous
generators are the
quintessential choice
for E-LNG power
plants.
The short power
connections from
generator terminals
to unit transformers
utilize insulated
phase-segregated
busbars for maximum
safety and reliability. |
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Efficiency up to 98.7 percent
The vacuum-pressure impregnated (VPI) stator winding is
indirectly cooled using the stator core as a heat sink,
resulting in an efficiency of 98.7 percent, low noise, and
totally maintenance-free operation for the 5+ year operating
regime in LNG liquefaction plants. Class F insulating
materials are used but utilized to Class B according to IEC
34-1 only. The rotor-bearing-stator assembly is supported
by a solid welded steel-base frame of the box-type that —
in combination with the fully assembled shipment — eases
transportation, installation, and alignment to the turbine.
A symmetric two-sided internal cooling-air stream is driven
by two shaft-mounted axial fans and provides for efficient
transfer of losses from the windings to built-in air-water heat
exchangers, and for even thermal expansion of the rotor.
In air-cooled liquefaction plants, generator cooling water is
re-cooled to ambient air temperature using standard
non-API fin-fan cooler banks. Electrical connections to the
generator circuit breaker and unit transformers are via
segregated-phase insulated bus bars. |
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Power Generation
