05/2013

Belwind 1

165MW offshore windfarm

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Overview

• BWI: 55 windturbines VestasV90 + 1 OHVS

• +/-48km off Zeebrugge• 17km²• 52km export cable• 50km infield cable• 550 GWh ~ 160.000 ton CO2

~160.000 household• construction 2009-2010• +/-650 mio EUR• EPCI VOMC

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Vessels

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WTG: Vestas V90Operational dataRated power: 3,000 kWCut-in wind speed: 3.5 m/sRated wind speed: 15 m/sCut-out wind speed: 25 m/sWind Class: IEC IA and IEC IIAOperating temperature range: standard range -20°C to 40°CRotorRotor diameter: 90 mSwept area: 6,362 m²Nominal revolutions: 16.1 rpmOperational interval: 8.6 - 18.4 rpmAir brake: full blade feathering with three pitch cylindersElectricalFrequency: 50 Hz/60 HzGenerator type: 4-pole doubly fed generatorGearboxType: two planetary stages and one helical stagePower regulationPitch regulated with variable speed

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Offshore High Voltage Station

Trafo 33/150 kV

• Main trafo

• Aux trafo’s

• HV switchgear

• Automation

• Generator/UPS

• Fire Fighting

• HVAC

• ...

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Infield Cable

5 strings of 10 turbines1 string of 5 turbines

Total 50km infieldConnection with OHVS

33kVIncluding fibre optic

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Infield Cable

cables outside cables inside Switchgear

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Infield Cable

Cables outside Switchgear cables inside

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Export Cable

52km export cable1 piece150kVIncluding fibre optic

3 crossings

30 cm Diameter80kg / meter

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Export Cable

Transformer150/33/33kV

Pass cable outside

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Export Cable

3Km Land Cable Booster station

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O&M organisatie

Board of directors

Management TeamCEO COO CLOCFO

Asset & ProductionManager

Electrical infra.Package

WTGPackage

BOPPackage

Cables

FoundationsOHVS + BS55 WTG

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WTG Package

55 V90 3MW turbinesBelwind – Long term contract – Vestas

- Competent and trained technicians -experts

- Access to knowledge database- Spare part availability

=> 15 year warranty

Availability guaranteesRevenue sharing model

1 contract manager

- Monitor availability- Maintain a downtime database- Define red flags- Steering in priorities

1 site manager

- Safe working- Quality of work- Audit and inspections- Technical queries

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Electrical Package

1 OHVS1 Booster StationEnergy trough the cables

Maintenance performed by Seahopper (builder)

- Steering of production 24/7- Emergency standby 24/7- Bundle activities of specialist partners

1 manager

- Installation responsible- Follow-up preventive maint.- Define adaptive maintenance- Control corrective maintenance- Spare part management- Continuous Improvement

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BOP Package

56 FoundationsPaintCathodic protectionDiving + ROVGrout + bearingsMechanicalScour protection

50 km of infield cable52 km of export cable

- Specialized contractor parties are hired- Aim to build long term relationships- Follow the market

1 manager

- Inspections and trending- Maintenance planning- Coordination of activities- Ownership of data- Survey planning and trending- Contingency portfolio

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O&M BoP: Threats• External corrosion

• Below water (CP)

• Splash zone

• above water

• Internal corrosion

• Vibrations: macro (fatigue)

• Vibrations: micro (bouten e.d.)

• Scour protection

• appendages (cranes, nav lights,

.)

• Cable damage

• ...

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O&M BoP: Open questions

• Scour protection: currently lack of knowledge/models• Vibrations: lack of knowledge/models; link to scour

protection?• Internal corrosion: bacteriel processes• CBM

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O&M BoP: monitoring

• Vibrations VUB AVRG

• Link scour protection

• Lifetime monitoring

• O&M optimization

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O&M BoP: monitoring

• Corrosion VUB SURF/Zensor

• Monitoring of corrosion(speed)

• Analysis of different kinds of corrosion

• O&M optimization

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O&M BoP: monitoring

• Drivetrain monitoring KUL mech• CMS optimization

• Grout analysis Ugent InCT/VUBMEMC

• Various theses