基于分步参数辨识的风电场动态等值建模方法研究  

Dynamic equivalent modeling of wind farm based on multi-step parameter identification

作　　者：高泽 刘明洋 陈幸伟 田春笋 王鹏 Gao Ze;Liu Mingyang;Chen Xingwei;Tian Chunsun;Wang Peng(State Grid Henan Electric Power Research Institute,Zhengzhou 450052,China;School of Mechanical and Electrical Engineering,UESTC,Chengdu 611731,China)

机构地区：[1]国网河南省电力公司电力科学研究院,河南郑州450052 [2]电子科技大学机械与电气工程学院,四川成都611731

出　　处：《可再生能源》2025年第2期233-242,共10页Renewable Energy Resources

基　　金：国网河南省电力公司科技项目资助(521702220009)。

摘　　要：在大电网安全稳定分析中,通常将大型风电场聚合为多台等值风机。在估计多台等值风机参数时,仅选出灵敏度大的关键参数进行辨识,等值模型的准确性和泛化能力受非关键参数赋值准确性的影响较大。文章提出了一种基于分步参数辨识的风电场动态等值建模方法。首先,采用聚类方法对风电场内风电机组进行聚类,并将每一聚类子群内的风电机组聚合为一台等值风机,建立风电场简化模型;其次,基于混合动态仿真技术,将每一台等值风机的外部系统替换为一个可变阻抗,实现各等值风机的独立辨识;最后,基于轨迹灵敏度对等值风机参数进行分类,并采用分步辨识方法对分类后的参数进行辨识。在改进IEEE 39母线系统中验证了所提方法的有效性。In the security and stability analysis of large-scale power grid,the wind farm models are usually simplified with the dynamic equivalent modeling method.For a large-scale wind farm,due to the large number of wind turbines and the divergences in their characteristics,the wind farm is generally aggregated into multiple equivalent wind turbines.When estimating the parameters of the equivalent wind turbines,in order to avoid identification of a large number of parameters at the same time,the existing method only selects the key parameters with large sensitivity for identification,and the remaining non-key parameters are not identified by giving the theoretical values.Therefore,the accuracy and robustness of the equivalent model are greatly affected by the accuracy of the assignment of non-key parameters.In order to solve this problem,the paper proposes a dynamic equivalent modeling method for wind farms based on multi-step parameter identification.Firstly,the clustering method is used to group the wind turbines,and the wind turbines within each subgroup are aggregated into one equivalent wind turbine to establish a simplified wind farm model.Secondly,based on the hybrid dynamic simulation technology,the external system of each equivalent wind turbine is replaced with a variable impedance to realize the independent identification of each equivalent wind turbine.Finally,the equivalent parameters of wind turbine are classified based on the trajectory sensitivity,and the classified parameters are identified with a multi-step identification method.The effectiveness of the proposed method is verified in a modified IEEE 39 bus system.

关 键 词：风电场 分步参数辨识 动态等值建模 灵敏度 

分 类 号：TK81[动力工程及工程热物理—流体机械及工程]