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风电功率激励下系统的频率响应特性不仅与风电接入量有关，还受风电接入位置、 AGC 控制单元和系统参数等因素的影响。为了研究影响频率质量的关键因素，本文建立了一种考虑发电机、调速器、调频器和负荷特性以及系统网络结构的含风电电力系统频率响应的频域分析模型，并推导了计及 AGC 的电力系统频率响应的传递函数。在 IEEE 10机39节点系统上，利用传递函数的幅频特性曲线，分析了风电接入点、 AGC 控制单元和系统参数变化对动态频率响应特性的影响。最后，利用本文提出的模型，结合实测风电功率数据仿真分析了 AGC 对系统频率质量的影响。“,”Frequency response to wind power is not only re-lated to the amount of wind power,but also affected by such factors as wind power access point,AGC control unit,sys-tem parameters,and so on.In order to study the key factors that influence frequency quality greatly,a frequency-domain model that considers the dynamic characteristic of generator with governor and AGC,load characteristic and network structure is built to get the explicit expression of transfer function for frequency response in this paper.Based on the model,the influence of wind power access point,AGC con-trol unit,system parameters on frequency dynamic charac-teristics is analyzed on IEEE 3 9-bus system by using the am-plitude-frequency characteristic curve of transfer function. In the end,combined with measured data of wind power, the influence of AGC on system frequency quality is evalua-ted by the proposed model.