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
1Thin 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.
2The 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.
3A 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.
4The patented RIGI-FLEXTM end-winding support system has been in 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.
5An 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
1
5
4
3 |
|
3 |
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
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
2
Loading...