1. Forth Estuary Forum 28th Nov 2013
The Seagreen Project in the Firth of Forth Round 3 Zone Nick Brockie, SSE Renewables Seagreen Offshore Project Manager

2. 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.

3. SSE Renewables Offshore 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

4. SSE Renewables Offshore 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

5. SSE Renewables Offshore Wind
Beatrice
Firth of Forth Zone
Islay
Hunterston
Dogger Bank Zone
Walney 1&2
Greater Gabbard,
Galloper

6. SSE Renewables Offshore Wind
National Offshore Wind Turbine Test Facility at Hunterston

7. Offshore Wind Turbines
Mitsubishi Sea Angel
Siemens NG6
Rotor - 154m
Hub height - 100m
No Gearbox – direct drive
6.0 MW (2 x 3.0MW Generators)
Rotor - 167m
Hub height - 110m
Hydraulic drive
7.0 MW (2 x 3.5MW synchronous generators)

8. 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

9. Firth of Forth Zone – Seagreen Phase 1 Offshore Project

10. Firth of Forth Zone – Seagreen Phase 1 Onshore Project
HVAC HVDC
Landfall at Carnoustie
19km underground cable
New substation at Tealing
Planning consent achieved November 2013!

11. 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

12. Firth of Forth Zone – Seagreen Phase 1 Offshore Project
Indicative wind farm layouts
(150 WTGs)

13. Offshore Wind Farm Design – Foundations and Substructures
Monopile Multileg (jacket) Gravity base Suction pile

14. Foundation and Substructure Design Considerations
Water depths
Ground conditions
Construction / logistics
Installation method
Environmental impact
Cost!!!

15. 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) 50
Height (m) 40 55
Weight (te)
2,500
16,000

16. 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

17. Cable Installation Array cables and Export cables
Buried in the seabed - ploughing or jetting
Cable Protection – rock dump or concrete mattress

18. 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?

19. Firth of Forth Round 3 Zone - Phase 1 Offshore Project
Project Alpha visualisation – Braes of Lunan