Offshore Wind Farm Projects

Ian Mould

Business Development Manager - Renewables

4th December 2012

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Agenda

• Alstom and Alstom Grid in the UK

• Projects delivered to date - Barrow, Robin Rigg, Ormonde, SheringhamShoal, German projects, lessons learnt so far

• Why we need to go for HVDC in Round 3 and the technical challenges that creates

• HVDC demonstrator and new HVDC factory at Stafford

• Conclusions

• Any Questions

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Rail transport infrastructure -Alstom makes 1 metro in 4 and 1 tram in 4

Alstom Group : Four main activities

Power generation infrastructure - Alstomsupplies major equipment in 25% of the worldwide installedpower generation capacity

Power transmission infrastructureStrong positions in key markets and technologies (Network Management, GIS, HVDC, Disconnectors, Instrument Transformers…)

Renewable power technologies – Hydro, biomass, wind, geothermal, tidal, solar, wave

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Global industrial footprint to enable global competitiveness

Over 90 manufacturing and engineering sites worldwide

Main Manufacturing SitesMain Engineering SitesR&D Competence CentresTechnology Centres

Moscow, Russia

Agreement for cooperation in

R&D

Gebze, Turkey

New service facility

Charleroi, Canada,

New Disconnectors

factory

Canoas, Brazil,

extension of the power

transformer factory

Stafford, UK

New service and

Technical Institute facility

Shanghai, China

China R&D

Technology Center

Chennai, Noida, India

Technical Institute

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UK Sites & Employees

Glasgow

Carlisle

Preston

Manchester

Warrington

Knutsford

Liverpool

Chester

Crewe

Wolverhampton

Birmingham

Stafford

Pembroke

Cwmbran

Maesgwyn

Langage

Newcastle

York

Staythorpe

Derby

Ashby-de-la-Zouch

Borehamwood

Grain

Hoo

Corporate

Power

Transport

Grid

Project sites

Dublin

Whitelee

Rugby CHQ

London

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Alstom Grid: The United Kingdom

• A leader in electrical transmission with a ~25% UK market share

• Over €370M in Sales 2010/11

• ~1300 UK based employees

• Complete UK coverage

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Why do we need substations at all?

Power transformers

SwitchgearProtection and control

Compensation systems

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132kV

400V400V400V

11kV11kV

400V400V400V

11kV11kV

Offshore Windfarm connected with HV AC

132kV

33kV

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Projects Delivered to Date – UK and Germany

Barrow90MW2006

Robin Rigg2 x 90MW

2009

Ormonde150MW2011

Alpha Ventus60MW

2008

Sheringham Shoal2 x 150MW2011

Total = 780 MW

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Projects under construction – Germany

Borkum West II400MW

Global Tech 1400MW

Baltic II288MW

Meerwind288MW

MEG I400MW

Gode Wind II252MW

Veje Mate400MW

Total = 2.4 GW

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Sheringham Shoal Offshore substations– ready for load out March 2011

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Sheringham Shoal Offshore substations– load out March 2011

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Sheringham Shoal Offshore substations– installation May 2011

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Sheringham Shoal- View from a PTV, summer 2012

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Connection point for Sheringham ShoalSalle 132kV Substation

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Lessons learnt

• Design co-ordination with topside designer – multilevel structures

• Access

− Tides− Weather windows− Vessels− Helicopters

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Why do we need expensive HVDC systems?- subsea cable

Copper conductorFibre optic comms

Insulation

Protective steel armour

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Why do we need expensive HVDC systems?- AC Cable

Offshore Generation Onshore

Demand

CopperConductor

InsulatorXLPE(plastic)

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Why do we need expensive HVDC systems?- DC Cable

Offshore ConverterStation

Onshore ConverterStation

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HVDC SystemsComparative HVDC & AC Transmission Costs

Cost

DCConverterStations

ACStations

DC

AC

Break EvenDistance

800kmOverheadLine

100km ?SubmarineCable

TransmissionDistance

Lines & Stations

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132kV

400V400V400V

11kV11kV

400V400V400V

11kV11kV

Offshore Windfarm connected with HV DC

33kV

300kV DC

< 100km

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Voltage Source Converters (VSC)

• Voltage Source Converters:

− Smaller footprint than older LCC technology making offshore applications more practical (although still large installations)

− Uses industry standard transistors (as used in railway locomotives etc)− Medium current achievable (limited by transistor technology)− High voltage achievable (voltage limited by available cable technology)− DC Grids more easily achieved, although switching is still a challenge− Conversion losses ~1.0% (total per station)

DC transmission

line

Q1 Q2P

VSC VSC

Station 1 Station 2

UC1 UC2

IC1

Network

1

Network

2

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Stafford - VSC Demonstrator

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Stafford - New Facilities for VSC Projects

VSC Manufacturing Facilities Complete March 2012

0ffice RelocationComplete 19th April 2012

Commencement of WorksOctober 3rd 2011

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Conclusions and Questions

• Conclusions− AC solutions now established− Still leaning in the offshore

environment – corrosion, access, logistics etc

− DC can be done but true costs not known – new technology in a hostile and inaccessible environment

− More projects need to be released from planning stage to allow the industry to develop

• Any Questions?

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