26.
The nacelle contains mechanical and electrical generating components displayed in Diagram 5.2.
Mechanical disc brake
Ultrasonic wind sensor Service crane
Composite disc coupling Oil and water coolers
Gearbox Main shaft
0
Pitch system Blade hub
Blade bearing
Blade
Rotor lock system Hydraulic unit
OptiSpeed©Generator Pitch cylinder
VMP-Top controller with converter Diagram 5.2 Internal workings of a wind turbine Nacelle.
5.4.3.1 Wind Turbine Layout 27.
The layout of the windfarm, including: wind turbines, inter-array and inter- connection cables and offshore collector and converter station locations have not yet been specified. Therefore exact locations are not included in the Development Consent Order (DCO) application. This is due to the requirement for flexibility on layout pending further ground investigation, detailed design and commercial negotiations. In developing the final layout, EATL would aim to optimise the layout of the windfarm in order to minimise environmental impacts (e.g. through micro- siting) and impacts to other users whilst maximising energy yield and cost efficiency.
28.
It is likely that the site would host more than one wind turbine type. At this stage, wind turbine types have not been determined, nor have the number of wind turbines required to achieve 1,200MWcapacity. The final windfarm layout would thus be governed by the choice of wind turbine model (or models) and be decided following the procurement stage after successful consent. Wind turbines of each type would be grouped together, i.e. there would be up to three groups of different turbines.
Torque arm Machine foundation
Yaw gear
Preliminary Environmental Information May 2014
East Anglia THREE Offshore Windfarm
Chapter 5 Description of the Development Page 9
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