The area of modern wind farm is large, and the distribution of wind speed is not uniform, so it is difficult to measure the accurate wind speed for a certain wind turbine. Therefore, in the actual control, the fan speed is not controlled directly, but the balance between the electromagnetic torque and the mechanical torque is changed by controlling the electromagnetic power of the wind turbine, and the speed control is achieved indirectly, so as to obtain the best speed and the best tip speed ratio. In this method, the speed of wind turbine is taken as the input, and the maximum power corresponding to this speed is calculated according to formula (3-5), which is used as the reference value of wind turbine active power after processing<br>
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