Wind energy is the kinetic energy generated by air flow. A form of conversion of solar energy. Due to the uneven heating of various parts of the earth's surface caused by solar radiation, the pressure distribution in the atmosphere is uneven. Under the effect of horizontal pressure gradient, the air moves along the horizontal direction to form wind. The total reserves of wind energy resources are very huge, and the energy that can be developed by technology in a year is about 5.3X10 ^ 13 kWh. Wind energy is a renewable clean energy with large reserves and wide distribution, but its energy density is low (only 1/800 of that of water energy) and unstable. Under certain technical conditions, wind energy can be developed and utilized as an important energy source.

Wind energy resources are determined by the wind energy density and the annual cumulative hours of available wind energy. Wind energy density is the wind power available per unit windward area, which is directly proportional to the third power of wind speed and air density.