Rapid Evaluation Method of Dynamic Frequency Response of Power System With Wind Power

The large-scale random fluctuation of wind power connected to the power grid causes system frequency deviation, thereby affecting the safe and stable operation of the system. In order to study the influence of wind power fluctuation at different frequencies on the frequency deviation of the system, a frequency domain analysis model of power system frequency response including wind power considering generator characteristics, governor characteristics, system network structure and load characteristics is proposed. Based on this model, the display expression of the frequency response transfer function of each node of the power system under wind power excitation is derived. According to the amplitude-frequency characteristic performance of the transfer function, the frequency response characteristics of each node under the excitation of wind power fluctuations of different frequencies are accurately reflected. The model is applied to the 39-node system of IEEE10 machine, and the simulation is carried out based on the measured wind farm power fluctuation data, and the results show that the influence of wind power on the frequency response of each node of the system can be quickly and accurately evaluated by using the model.