Rampion Offshore Wind Farm Offshore Work Packages

Meet The Buyer Naren Mistry, Engineering Manager 26th Feb 2014

Rampion Offshore Project Scope

Design, manufacture, transportation and Installation: � Up to 175no. Wind turbines � Up to 177No. Foundations � Up to 230km Array cables �  4No. Export cables �  2No. Offshore Substations

Bathymetry & Geotechnical Investigation

             

Offshore Geotechnical contract: Aug 13 – Apr 14 •  183 Boreholes and Cone

Penetration Tests (CPT) •  Export cable route survey •  Extensive Lab testing •  Modelling site by combining

Geotechnical and Geophysical survey results

Subsea Geology

             

- Geologically complex site -  Variety of clays, sands, chalk, etc -  Paleochannels

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Electrical system schematic

O&M Building Quayside

Crew Vessels Jackup-Vessels

Offshore Substation

Array Cable

Foundation

Wind Turbine Generators

Export Cable Onshore Substation

Grid

Transition Piece

Breakdown of Offshore Contract Packages - 1 �  Wind Turbines 1. Design, manufacture, pre-assembly, commissioning 2. Installation: MPI Charter vessel plus installation contract

�  Monopile Foundations 1. Front end engineering design (FEED), basis of design (BOD), Detailed

Design - Consultancy Contract awarded 2. Fabrication Contract(s) – monopiles and transition pieces fabrication (inc

transportation) 3. Installation: Foundation Vessel Charter (inc installation) �  Jacket Foundations 1. Competitive FEED and Tender Proposal – Jacket fabricators 2. Detailed Design, fabrication & transportation – Jacket fabricator 3. Jacket Installation: Foundation Vessel Charter (inc installation) 4. Pin Pile installation: Possible small jack-up contract

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Breakdown of Offshore Contract Packages - 2 �  Export Cables 1. Preliminary Design/FEED: In-house 2. Design & Supply: Supply contract 3. Installation: Cable vessel charter (inc transportation & installation) �  Array Cables 1. Preliminary design/FEED: In-house 2. Design & Supply: Supply contract (inc cable protection system) 3. Transportation: Barge contracts 4. Installation: Cable vessel(s) charter (inc installation)

�  Offshore Substations Topsides (inc substation foundations) 1. FEED & BOD – Consultancy contract awarded 2. Design, fabrication, electrical installation, transport - Fabricator 3. Installation: Heavy lift crane vessel charter (inc installation services) 4. Supply of electrical equipment by the onshore substation EPC contractor

(inc installation & Commissioning)

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Foundation types

             

•  Variability of ground conditions & water depths

•  Monopile and jacket foundations (most commonly used to-date)

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Installation of monopile foundations

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Wind Turbine Transport & Installation MPI Discovery

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Turbine Tower Installation

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Turbine Nacelle Installation

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Turbine Blade Installation

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Offshore Substations

�  Electricity produced by the turbines is

transmitted by subsea array cables to the offshore substations

�  Substations house the high and medium

voltage electrical components for transformation of the 33kV voltages produced by the wind turbines to 150kV export voltage

�  Two export cables transmit the electricity from

the substations to the shore �  Substations also house control rooms,

emergency accommodation and workshops

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Installation of offshore substation topsides

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Marine Export Cables

Export Cables • The marine export cables will connect the offshore substations the landfall point. • Three core 150kV cables with fibre optics.

Export Cable Installation • Cables will be laid and ploughed to burial depth approx 1.5-2m below the sea bed.

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Array Cables

Array Cables • Connect the wind turbines to each other and to the offshore substations. • 150mm2 (33kV) and 500mm2 3 core submarine cable. Array Cable Installation •  Cables are loose laid on seabed and pulled into the transition piece through external j-tubes or internally thorough holes in the monopiles • The cables are buried by jetting or ploughing techniques. • All cables will be buried at a target depth of 1.5m under the sea bed.

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Installation Vessels MPI Adventure A2 Sea Seaworker

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Installation Vessels Ballast Nedam HLV Svanen

Offshore construction supply chain opportunities �  Major offshore construction activities over a two year period to install and

commission the wind turbines, foundations, subsea cables and offshore substations

�  As well as the major installation vessels, many smaller vessels will be required, e.g. guard boats, etc

�  Ancillary and support services for installation vessels. e.g bunkering, etc

�  Specialist services for offshore works, e.g. diving services, etc

�  Experience on other projects shows local suppliers will be required to support construction base activities, e.g plant hire, etc

�  Further details of the offshore contracts and potential opportunities in the afternoon ‘Offshore Balance of Plant’ focus group

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Thank You