This dialog allows you to describe a wind generator supplying electrical power to the building.
Wind generator
Tick this box to specify the existence of a wind generator.
Hub height
The height of the turbine hub above the ground.
Rated power
The maximum output power of the turbine.
Power curve
Click on Define power curve to display the power curve parameters for editing.
You can use the default power curve or specify your own.
The power curve is defined as output power, here expressed as a fraction of rated power, as a function of wind speed. The first point on the power curve, which is uneditable, is (0,0). The second point indicates the cut-in wind speed – the wind speed at which the generator will start to generate power. The power output at this point is uneditable at the value zero.
Above a certain wind speed (the furling or governing speed) the turbine power output will be automatically limited in order to prevent damage to the machine. The best wind turbines will continue to deliver rated power in very high wind speeds, but many will shut down instead. The default power curve has a cut-off wind speed of 25 m/s, but wind speeds of this magnitude are rare.
The wind speed plotted on the power curve is the wind speed at hub height. This is calculated as a function of meteorological wind speed recorded on the weather file and the terrain type specified in APlocate.
