Wind turbine generator sets are systems that convert the kinetic energy of the wind into electrical energy. The wind power supply consists of wind turbine generator sets, towers that support the generator sets, battery charging controllers, inverters, dump loads, grid connection controllers, battery banks, etc. Changes in wind speed and direction have a significant impact on the power generation of wind turbines. Generally, the higher the tower, the greater the wind speed, the more stable the airflow, and the greater the power generation. Therefore, the site selection of wind turbines should be carefully considered. The general requirements are as follows: The recommended minimum tower height for wind turbine generator sets is 8 meters or more than 5 meters away from obstacles. Within a 100-meter range centered on the installation range, there should be as few obstacles as possible.

The installation of two adjacent wind turbines should maintain a distance of 8 - 10 times the diameter of the wind wheel. The site selection of wind turbines should avoid turbulent areas. Areas with relatively large annual average wind speeds, stable prevailing wind directions, and small diurnal and seasonal variations in wind speed should be selected.

The vertical wind speed shear within the height range of the wind turbine should be small. Locations with as few natural disasters as possible should be chosen.

Wind turbine generator sets can be classified according to the structure of the main drive chain into doubly-fed wind turbine generator sets with multi-stage speed-increasing gearboxes, direct-drive wind turbine generator sets without speed-increasing gearboxes, and semi-direct-drive wind turbine generator sets with a single-stage speed-increasing gearbox.

They can also be classified according to the speed regulation method of wind turbine generator sets into constant-speed constant-frequency wind turbine generator sets and variable-speed constant-frequency wind turbine generator sets.

Variable-speed constant-frequency wind turbine generator sets have become the mainstream models in wind power generation due to their higher wind energy utilization efficiency.

For small wind turbine generator sets, the rated power is generally between tens of kilowatts and several hundred kilowatts; for medium-sized wind turbine generator sets, the rated power is generally between several hundred kilowatts and several megawatts; for large wind turbine generator sets, the rated power is generally between several megawatts and more than ten megawatts.