Standalone hybrid generation system for the remote area of Thar, Pakistan
From the above characteristic curve, there are three important points at which much attention is paid
for the speeds and the corresponding turbine output powers for every wind turbine. These are the cut-
in speed, rated output speed and cut-out speed. The important terms characterizing the turbine power-
speed (Figure 2-9) characteristics are described below.
Cut-in speed A very low wind normally exerts insufficient torque on the wind turbine blades to make
them rotate.
When the speed increases, the wind turbine starts rotating
and generating electrical
power. The speed at which the turbine first starts to rotate is called the cut-in speed and is typically
between 3 and 4 m/s [24].
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