提出基于网侧控制器限幅环节动作时间分群的直驱永磁风电场动态等值建模新方法.分析了直驱永磁风电机组网侧控制器电流限幅环节动作特性的影响因素,指出网侧控制器限幅环节的动作特性主导了风电机组的动态.提出了基于稳态出力以及电压跌落程度的直驱永磁风电机组网侧控制器限幅环节动作时间的快速估算方法,进一步采用K-means方法将网侧控制器限幅环节动作时间相近的直驱永磁风电机组进行分群聚合.以某一风电场接入10机39节点系统为例,比较风电场分别采用详细模型和等值模型下的动态响应结果,以及风电场动态等值前后原系统的小干扰稳定性和暂态稳定性,证明了本文所提动态等值方法的有效性和可行性.%In this paper,a new dynamic clustering method for the DDPMSG-based wind farm is proposed based on the action time of current limiting component in the grid-side controller. Firstly,the affecting factors on the action time of current limiting component in grid-side controller are analyzed,and it is pointed out that the action time of limiting component dominates the dynamics of DDPMSG-based wind turbines. Secondly,the estimating method of limiting component action time is proposed based on the steady active power and the terminal voltage sag. Finally, the DDPMSG-based wind turbines are grouped based on the limiting component action time with K-means method. The 10-machine 39-node system integrated with a wind farm is used as the test system,and the dynamic responses of the wind farm based on its detailed model and the equivalent one are compared. Meanwhile,the small-signal stability and transient stability of the overall system are analyzed with detailed wind farm model and equivalent wind farm model. Compared result validates the clustering method proposed in this study.
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