中文摘要：

针对风电场建立多机等值模型时等效风机数目不确定的问题,通过分析风电机组的运行机理,以风机的实际参数为聚类指标,引入轮廓系数计算不同等值数目时的轮廓值,选择最优的聚类数目,运用改进分裂H-K聚类算法进行聚类。在MATLAB平台上建立风电场详细模型和聚类模型,在两种风速模式下分析两种模型输出的有功功率和无功功率曲线,结果表明两种模型曲线在同时间点上相对误差率很小,提高了模型精度。文中提出的方法可以运用于风电场的多机等值建模,能够比较准确地反映风电场的动态响应特性。

英文摘要：

Aiming at the present problems that the number of clusters in the equivalent model of wind farm is uncertainty, the mechanism of wind turbine is analysed. Taking the actual parameters of wind turbine as cluster indexes, silhouette coefficient is introduced to calculate different number of clusters in the equivalent model to obtain the optimal number of clusters of wind farm. According to the clustering algorithm, complete equivalent model of wind farm is set up. A detailed model and clustering model of wind farm are built on MATLAB. Under two wind speed conditions, the active power and reactive power curve of the two models are analyzed in the two models. The results of simulation show that, using the method of equivalent model and the detailed model of wind farm in the output of active power and reactive power curves at the same time the relative error is quiet little. The accuracy of the model is improved. So this method can be used in making equivalent model of wind farm, which can accurately reflect the dynamic response of wind farm.