直驱式永磁同步风电机组的风电场降阶等值模型

Equivalent Model of Order Reduction of Wind Power Plant with DD-PMSG

针对直驱式永磁同步风电机组的风电场等值建模这一难题,采用模型降阶方法和参数辨识技术,提出了一种风电场降阶等值模型构建方法。该方法首先根据直驱式永磁同步风电机组的数学表征构建聚合风电场的等值模型,采用平衡截断模型降阶方法进一步对风电场等值模型进行降阶处理,建立风电场降阶等值模型;然后利用确定自回归移动平均方法辨识等值风电场的模型参数,并通过实例风电场进行仿真分析。算例分析表明,数据的降阶等值模型能够合理表征风电场的并网运行状况,在风速波动和电网扰动下均能反映出风电场的动态输出特性,可为直驱式永磁同步风电机组的风电场运行分析及并网研究提供参考。

To solve the problem of equivalent modeling for the wind power plant equipped with direct-driven with permanent magnet synchronous generator (DD-PMSG), this paper uses the method of model reduction and parameter identification technology to propose a kind of construction method for the equivalent model of order reduction of the wind power plant with DD-PMSG. This method firstly builds an equivalent model for aggregating the wind power plant according to mathematical representation of the DD-PMSG, uses a balance truncation method to reduce order of the equivalent model for the wind power plant and establishes the equivalent model for order reduction of the wind power plant. Then by using the deterministic auto-regressive moving average method, it identifies model parameters and makes simulated analysis through examples. The results indicate the equivalent model of order reduction can reasonably represent grid-connection operation of the wind power plant and reflect dynamic output characteristics of the wind power plant under wind speed fluctuation and power grid disturbance, that means it can provide references for analyzing and studying operation and grid-connection of the wind power plant with DD-PMSG.