Abstract
In the power system, wind power generation plays a significant role. Research on the frequency regulation capability of wind turbines is very important. MATLAB is a commonly used simulation platform for control method research, however, the simulation speed of a large-scale power system containing wind power generation is quite slow. To improve the research efficiency as much as possible while meeting research needs, an integrated model of the doubly-fed induction generator (DFIG) model and system frequency response (SFR) model is proposed in this paper. First, a simplified DFIG model is established which only retains the wind turbine, swing equation of rotor, speed regulator with frequency regulation control, and pitch controller. Then, the integrated method of the simplified DFIG model and SFR model is introduced. The simulation result shows that the frequency response of the integrated model is consistent with the complete power system model containing a detailed DFIG model, and the simulation speed is increased by more than 130 times. In addition, since the wind speed input-related part is preserved, the integrated model can be used for frequency regulation control research of wind turbine generators considering the continuous change in wind speed.
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