包含双馈异步风力发电机的综合负荷参数辨识

Parameter Identification on the Comprehensive Load of Double-fed Asynchronous Wind Induction Generators

基于配网侧机理动态负荷特点,构建了包含双馈异步发电机的综合负荷数学模型。根据华北电网某节点实测相量测量单元数据,利用总体测辨法进行模型参数辨识。以负荷节点输入电压为综合负荷数学模型的输入量,并以计算电流与实测电流误差最小值作为目标函数,采用遗传算法辨识出风电综合负荷的模型参数。辨识结果体现了负荷中以双馈异步发电机为主体的特征,与负荷特点相吻合,说明辨识方法有效。

Based upon the mechanism of dynamic load in the distribution network side,a comprehensive load mathematic model with double-fed induction generator is built up.According to the bus PMU data at a node of the North China Power Crid,the model load node parameters are identified by using the overall measurement-identification method.In case that the load node voltage as load parameters are input into the mathematic model and minimum difference between calculated current and actually-tested current is used as the objective function,the genetic algorithms is applied to identify the comprehensive load data of the wind generator.The identification results fully reflect the subjective characteristic of load of the double-fed induction generator among other loads,meeting with the load features and showing this identification method valid.