Willi Rütti

Alstom GIGATOP Turbogenerators

Paris, 2008-08-27

Alstom GIGATOP Turbogenerator - 27/08/2008 - P 2© ALSTOM 2008. All rights reserved. Information contained in this document is provided without liability for information purposes only and is subject to change without notice. No representation or warranty is given or to be implied as to the completeness of information or fitness for any particular purpose. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

Power Generation … a booming market

Alstom GIGATOP Turbogenerator - 27/08/2008 - P 3© ALSTOM 2008. All rights reserved. Information contained in this document is provided without liability for information purposes only and is subject to change without notice. No representation or warranty is given or to be implied as to the completeness of information or fitness for any particular purpose. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

0 500 1000 1500 2000 25

GIGATOP 4-pole Hydrogen andwater-cooledGIGATOP 2-poleHydrogen andwater-cooled

TOPGASHydrogen-cooled

TOPAIRAir-cooled

TOPACKAir-cooled

Comprehensive range from 40 to 2000 MVA

2000

2000

1400

1100

530

450

400

300

150

9040

50 Hz

60 Hz

TurbogeneratorsProduct families

Rated outputs MVA

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GIGATOP 2-poleIn operation today – for close to 25 years

Leibstadt, Switzerland• 1318 MVA• Commercial operation since 1984

More than 20 years experience with highest ratings

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Lippendorf, Germany• Europe’s most modern lignite plant• 2 x 1166 MVA• Commercial operation since 1999• > 99% availability

GIGATOP 2-poleIn operation today – newest technology

Newest technology with potential for higher ratings

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First unit delivered to site

GIGATOP 2-poleProjects in execution – Units delivered

Neurath, Germany• World’s largest lignite fired plant• 2 x 1333 MVA• Commercial operation: 2010

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World’s largest 2-pole turbogenerators under construction

GIGATOP 2-poleProjects in execution – Largest unit being built

Datteln 4, Germany• World’s largest hard coal fired plant• 2 x 1400 MVA• Commercial operation: 2011

Alstom GIGATOP Turbogenerator - 27/08/2008 - P 8© ALSTOM 2008. All rights reserved. Information contained in this document is provided without liability for information purposes only and is subject to change without notice. No representation or warranty is given or to be implied as to the completeness of information or fitness for any particular purpose. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

Chooz & Civaux, France• Largest turbogenerators in operation today• 4 x 1710 MVA• Commercial operation since 1996• 99.97% reliability

Largest 4-pole units in operation with highest reliability

GIGATOP 4-poleIn operation today

Alstom GIGATOP Turbogenerator - 27/08/2008 - P 9© ALSTOM 2008. All rights reserved. Information contained in this document is provided without liability for information purposes only and is subject to change without notice. No representation or warranty is given or to be implied as to the completeness of information or fitness for any particular purpose. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

18 units (25 GW) ordered since 2005

USA FRANCE

SWEDEN

CHINA

FINLAND

MEXICO

1x1500 MWe

2x1150 MWe4x1150 MWe2x1760 MWe

4x1800 MWe 2x990 MWe

2x850 MWe 1750 MWe

60 Hz recent orders 50 Hz recent orders

GIGATOP 4-poleProjects in execution

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• No copper oxides • No clogging

Maintenance free through stainless steel Welded connections

Functional separation of electrical and hydraulic connection

GIGATOPUnique stator bar design

VPI insulation and stainless steel tubes for reliable operation

MICADUR®

High performance VPI Insulation

Up to 30 KV

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• Constant radial pressure• Settling effect compensation• Re-tightening

GIGATOPStator wedging designed for ease of maintenance

Alstom GIGATOP Turbogenerator - 27/08/2008 - P 12© ALSTOM 2008. All rights reserved. Information contained in this document is provided without liability for information purposes only and is subject to change without notice. No representation or warranty is given or to be implied as to the completeness of information or fitness for any particular purpose. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

GIGATOPRetighten able stator end winding support

GIGATOP 2-poleGIGATOP 4-pole

• Massive support rings• Free axial expansion • No loosening in operation • Re-tightening possible during

regular maintenance

To allow short maintenance time

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GIGATOPSingle stage fans for highest efficiency

GIGATOP 2-poleGIGATOP 4-pole

1 high efficient radial fan

2 high efficient axial fans

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GIGATOP 4-poleCompact and high performing brushless exciter

• No slip rings and brush gear

• Excellent dynamic behaviour supporting grid stability

• Extreme compactness

• No need for 3rd bearing

TKJ Exciter Before TKJ

Reduced shaft line length

Alstom GIGATOP Turbogenerator - 27/08/2008 - P 15© ALSTOM 2008. All rights reserved. Information contained in this document is provided without liability for information purposes only and is subject to change without notice. No representation or warranty is given or to be implied as to the completeness of information or fitness for any particular purpose. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

GIGATOP 2-poleBrush gear designed for ease of maintenance

• Air-cooled• Brushes online exchangeable

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GIGATOPKey benefits summary

• Easy, short and lowest maintenance

• Reliable operation

• Highest efficiency

• Reduced shaft line length

• Unique brushless exciter

Alstom GIGATOP Turbogenerator - 27/08/2008 - P 17© ALSTOM 2008. All rights reserved. Information contained in this document is provided without liability for information purposes only and is subject to change without notice. No representation or warranty is given or to be implied as to the completeness of information or fitness for any particular purpose. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

TurbogeneratorsReliability

0.19%0.12% 0.11%

0.01%

0.53%

0.0%

0.1%

0.2%

0.3%

0.4%

0.5%

0.6%

TOPACK* TOPAIR* TOPGAS* GIGATOP* NERC**

Forc

ed O

utag

e R

ate

* Alstom data derived from Strategic Power Systems Inc. (1990-2007)** North American Electric Reliability Council (NERC), Data cover all fossil steam plants (2002)

Alstom fleet

Very high reliability demonstrated

Alstom GIGATOP Turbogenerator - 27/08/2008 - P 18© ALSTOM 2008. All rights reserved. Information contained in this document is provided without liability for information purposes only and is subject to change without notice. No representation or warranty is given or to be implied as to the completeness of information or fitness for any particular purpose. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

• Technology Development Quality Process

• Product Development Quality Process

• Type tests

• Modern design/calculation tools

• Systematic operation feedback analysis

TurbogeneratorsMinimize risk for OEM and customers

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• Railway transportation– Frame diameter: 4,15 m– Stator frame weight: 450 T

• Alternatives– Road transportation– Stator stacking/assembly on site

Schnabelcar

GIGATOPTransport

Alstom GIGATOP Turbogenerator - 27/08/2008 - P 20© ALSTOM 2008. All rights reserved. Information contained in this document is provided without liability for information purposes only and is subject to change without notice. No representation or warranty is given or to be implied as to the completeness of information or fitness for any particular purpose. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

• Grid stability influenced by generator pf and scr

• Use of modern digital AVR

• Stiffening grid by reinforcing lines

• Innovation in plant equipment

• Superconducting technology based on 2nd

generation HTS

From focus on generator to focus on full system

GIGATOPGrid aspects

Alstom GIGATOP Turbogenerator - 27/08/2008 - P 21© ALSTOM 2008. All rights reserved. Information contained in this document is provided without liability for information purposes only and is subject to change without notice. No representation or warranty is given or to be implied as to the completeness of information or fitness for any particular purpose. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

Still some room for higher ratings

• Rotor limitations

– Capability of forging suppliers

– Material stress limits

– Rotor dynamics

• Up-rating potentials

– Cooling system optimization

– Electrical field strength in HV insulation

– Higher voltage ratings

GIGATOPLimiting parameters and up-rating potentials

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