How do wind turbines work?

When the wind turbine produces electricity, it must ensure that the output frequency is constant. This is very necessary for both grid-connected wind power generation and wind-solar hybrid power generation. To ensure that the frequency of wind power is constant, one solution is to ensure a constant speed of the generator, that is, a constant speed and constant frequency mode of operation. Since the generator is driven by the wind turbine through the transmission device, this. the method undoubtedly requires a constant frequency of the wind turbine, this method will affect the wind energy conversion efficiency; another method is that the generator speed changes with the wind speed, and other means are used to ensure that the electrical output frequency; the energy is constant, i.e. operation at constant frequency and speed variable. The wind energy utilization coefficient of the wind turbine is related to the blade tip speed ratio (the ratio of the linear speed of the turbine tip to the wind speed). There is a certain blade tip speed ratio that causes Cp to reach the maximum value. Therefore, in the variable speed and constant frequency operation mode, the rotation speed of wind turbines and generators can vary within a wide range without affecting the frequency of the output electric power. Therefore, wind turbines often use a variable speed constant frequency method to ensure a constant output frequency.