| Wind power is a kind of clean and renewable energy. Under the promotion and avocation of green energy and sustainable development, wind power is the first choice for generation. But wind power different from the traditional way of generating, because of its highly volatility. So wind power injection has a significant influence on the stability of electrical network.In this paper, the frequency stability of power system after wind power injection is studied and analyzed based on DPF software. Firstly, the operation mechanism of wind power unit is analyzed, and the mathematical model of FSG and DFIG are detailedly deduced. Secondly, the equivalent model of wind farm is established based on DPF, the system frequency response is studied after the disruptions occurred on the grid and wind farm based on the network of Xinjiang, and then the influence on the frequency space-time characteristics after the wind power access to the grid is analyzed. Thirdly, the effect on the stability of the system frequency with the changes of wind power injection capacity is analyzed based on a test system. Finally, the SFR is simulated, based on an other test system, resulted from the output power fluctuations of wind farm.The results, in this paper, show that the frequency response is different from wind turbine type to type. The FSG can provide support to frequency, instead the DFIG has little influence on the frequency under its decoupling control. The frequency time-space characteristic is changed after wind power access, and the nonselective of frequency control device will appear. If the way of generating decommittment was used to adapt to the wind power injection, when the frequency drop or increase, the change value of frequency is larger than the way of loading increasing. The AGC can be used to restrain the frequency fluctuations caused by the change of wind farm output power, and make it restored to normal value.
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