Siemens SGen-2000H User Manual
The hydrogen-cooled
SGen-2000H generator series
with ratings from 310 MVA up to 600 MVA
SGen5-2000H at Otahuhu Combined Cycle Power Plant (New Zealand)
The SGen-2000H series of hydrogencooled, two-pole generators is part
of Siemens Generator (SGen™) product
line, with ratings up to 600 MVA for
steam, gas and combined-cycle applications.
Cooling performance is greatly enhanced
through the use of hydrogen as cooling
medium. Due to advanced material
technologies and resulting heat transfer
benefits, the generator components have
been designed to achieve optimal performance while providing safe operation
and reliability. In addition, frictional losses
are significantly lower than those with
air, thus improving the overall generator
efficiency and performance.
Our innovative design philosophy strives
to continually improve world-class generators in order to meet our customers
varying requirements and provide utmost
reliability and efficiency.
Answers for energy.
Innovative design for world-class performance
in power generation: The SGen-2000H generator series
1
Thin laminations of high-grade, low-loss silicon steel are consolidated
to form the stator core. Each lamination is electrically insulated with
high-temperature capability material. The laminations are stacked to
form the stator core with finger-plates and heavy end-plates at each
end. Key bars and insulated through-bolts are used to maintain core
integrity and tightness. The resultant stator core assembly features long
lasting tightness, mechanical robustness, and excellent heat transfer
characteristics.
2
The generator stator winding assembly is manufactured with Vacuum
Pressure Impregnation (VPI) technology or Global Vacuum Pressure
Impregnation (GVPI). (G)VPI features advanced epoxy-mica insulation
systems to ensure insulation integrity, to reduce the possibility of loose
end-winding components and to reduce moisture and surface contamination, resulting in stator winding with high voltage endurance.
3
A patented core spring mounting system is used to reduce the noise
level and transient forces. The design isolates the double operating
frequency core vibration and reduces electrical transient forces on the
generator frame and foundation.
4
The patented RIGI-FLEX
successful operation since the 1980s. This well proven bracing system
provides rigidity to withstand transient fault loads combined with
flexibility to withstand normal operation cyclic thermal expansion
and contraction which occurs during start-ups and load changes.
5
An optimized rotor slot design provides uniform cooling flow through
the rotor while also improving overall dynamic stability. A single-stage
blower at each end of the generator results in a uniform thermal load
in the generator rotor.
2
4
TM
end-winding support system has been in
1
5
33
Customer Benefits
■
Efficiency of up to 99 %
Hydrogen seal with carbon elements ■
requires minimal seal oil and has
improved emergency operating
characteristics
■
Uniform temperature profile
promotes reliability
■
Simplified installation
Transport dimensions suitable ■
for rail transport in most countries
■
Design based on field-proven
generator component designs
2
For over 60 years, Siemens has made
many detailed improvements to the
design of hydrogen-cooled generators.
Additional improvements include:
■
Advanced Performance Plus™ seal
system
■
Totally enclosed system minimizes
the risk of contamination inside the
generator
■
Integrated & Compact Omega™
Coolers
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