There are various wind turbine models, with two main designs - horizontal axis wind turbines and vertical axis turbines - both of which are installed on tall masts.
Turbines have a brake and gearbox mechanism behind the blades, which allow for greater control of the system and for the generator to be shut down in case of a fault.
The control systems are electrical and computerised, with several automatic brake systems that are able to shut down the generator in adverse conditions or if a fault occurs. It may be possible for this to be carried out remotely by a monitoring station.
Large-scale wind farms will have multiple large turbines, all connected to the grid, and comprehensive control mechanisms. They are also likely to have an on-site transformer, which is required to increase the voltage of the generated electricity before being fed into the grid.
Hazards (for further information refer to National Operational Guidance: Utilities and fuel)
- Remote locations for access
- Risk of collapse if damaged
- Difficult to isolate and control without specialist advice or assistance
- Whenever a turbine is moving it is generating electricity
- Falling or 'planing' debris over large area
References and further reading