The Seagreen Project in the Firth of Forth Round 3 ZoneNick Brockie, SSE RenewablesSeagreen Offshore Project Manager

Forth Estuary Forum 28th Nov 2013

Seagreen Wind Energy Limited

SSE Renewables and Fluor Ltd joint venture (partners on Greater Gabbard OWF development)

For development, construction and operation of offshore wind farm projects in the Firth of Forth Round 3 Zone

Contractual Zone Development Agreement with The Crown Estate

Target generation capacity 3,500MW, up to 7 offshore wind farms.

The Crown Estate development partner, sharing some development costs.

SSE RenewablesOffshore Wind

Part of SSE plc - approximately 11,500MW electricity generation capacity

Over 3,000MW Renewables capacity (hydro, onshore wind, offshore wind)

Operational offshore wind farms

– Greater Gabbard 500MW (with RWE)

– Walney 1&2 370MW (with Dong)

Also 4,400MW coal fired; 4,500MW gas and oil fired capacity

SSE RenewablesOffshore Wind

Significant investment in development of offshore wind capacity by SSE Renewables, with a range of partners

Galloper OWF (consented May 2013) - up to 500MW

Beatrice OWF (Moray Firth) - up to 1,000MW

Firth of Forth R3 Zone (Seagreen) - up to 3,500MW

Islay OWF - up to 750MW

Dogger Bank R3 Zone (Forewind) - up to 9,000MW

Hunterston – National Offshore Wind Turbine Test Facility

SSE RenewablesOffshore Wind

Beatrice

Walney 1&2

IslayFirth of Forth Zone

Dogger Bank Zone

Greater Gabbard,Galloper

Hunterston

SSE RenewablesOffshore Wind

National Offshore Wind Turbine Test Facility at Hunterston

Mitsubishi Sea Angel

Offshore Wind Turbines

Rotor - 154m

Hub height - 100m

No Gearbox – direct drive

6.0 MW (2 x 3.0MW Generators)

Siemens NG6

Rotor - 167m

Hub height - 110m

Hydraulic drive

7.0 MW (2 x 3.5MW synchronous generators)

Firth of Forth Zone - Seagreen Phase 1 Offshore Project

Zone area 2,850km2

23km min to 80km offshore

Water depth 35m to 70m

3 Development Phases

Phase 1 (offshore application Oct 2012)

– 400km2 total area

– Up to 150 WTGs

– 1,050MW max capacity

– Export cable landfall Carnoustie

Firth of Forth Zone – Seagreen Phase 1 Offshore Project

Firth of Forth Zone – Seagreen Phase 1 Onshore Project

Landfall at Carnoustie

19km underground cable

New substation at Tealing

HVAC HVDC

Planning consent achieved November 2013!

HOW TO BUILD AN OFFSHORE WIND FARM?

Key Components

Met mast(s)

Wind turbine generators

Array cables

Offshore substation

Export cables (offshore and onshore)

Onshore substation

Firth of Forth Zone – Seagreen Phase 1 Offshore Project

Indicative wind farm layouts

(150 WTGs)

Offshore Wind Farm Design – Foundations and Substructures

Monopile Multileg (jacket) Gravity base Suction pile

Foundation and Substructure Design Considerations

Water depths

Ground conditions

Construction / logistics

Installation method

Environmental impact

Cost!!!

Offshore Substations

Collection point for array cables

Steps up voltage

Export back to onshore substation

HVDC or HVDC

OSP AC 500MW DC 1GW

Length (m) 45 86

Breadth (m) 45 50

Height (m) 40 55

Weight (te) 2,500 16,000

Offshore Wind Farm Construction

Port facilities– lay down and load out

Installation vessels– Jack-up, transport barge, cable

lay, ROV support, guard, floating heavy lift, personnel transfer vessel.. etc

Capacities and Operability

Cable Installation

Array cables and Export cables

Buried in the seabed - ploughing or jetting

Cable Protection – rock dump or concrete mattress

Offshore Wind Farm Operation and Maintenance

25 year working life

Monitoring and service

Preventative and corrective maintenance

Minimise downtime and lost revenue

O&M Vessels– Crew transfer vessels (helicopters?)– Heavy lift– Survey / ROV– Offshore service vessels?– Floating accomodation?

Firth of Forth Round 3 Zone - Phase 1 Offshore Project

Project Alpha visualisation – Braes of Lunan