Wind energy facilities are typically located on sites with steady winds throughout the year, good road access, proximity to the electricity grid and the grid’s capacity (existing and planned). They can vary considerably in size and scale depending on the physical features of the land, the wind resources available, and the grid capacity available.
A wind energy facility typically includes:
- a series of wind turbines
- one or more substations
- power lines to connect to the electricity network
- a temporary construction compound
- wind monitoring equipment, which can include an anemometer
- access tracks, and
- underground cabling connecting the wind turbines to the on-site metered output point from the converter station where the generated electricity will enter the distribution system. This includes connections from the wind turbines to the onsite substations (i.e. an electricity generation, transmission and distribution system where voltage is transformed from high to low, or the reverse, using transformers).
A larger facility may also include:
- a quarry
- concrete batching plant(s)
- an operations and maintenance facility
- a battery energy storage system.
Wind turbines in new wind energy facilities are typically large, rotating, three-bladed machines that produce more than 4.0 MW of electrical output.
Most wind turbines have a generator and rotor blades mounted on top of a steel tower. The rotor blades rotate horizontally, and the turbine’s total site can be as high as 220 to 280 metres.