In the future power system in China

wind power will undertake the task of frequency regulation to ensure the safe and stable operation of the power system. To systematically present the current states of wind power frequency regulation

this paper summarizes the frequency regulation technologies of the wind power unit and wind farm

and the relative studies on models and strategies. The frequency regulation method of the wind power unit includes the rotor kinetic energy control

power reserve control

and combined control. The frequency regulation of the wind farm requires cooperation among wind power units to maximize the frequency regulation effect. The auxiliary equipment can also be adopted to assist this process. The frequency regulation strategy of wind power relies on the model. While the present models of the wind farms are obtained using the equivalent method

which is significantly different from the actual power system. In the future

the model should be further optimized

and the frequency regulation strategy should be improved and tested in engineering practice as soon as possible.