含直驱永磁风电场的配电网广义负荷建模

发布时间：2018-11-27 09:51

【摘要】：以可再生能源为主的分布式电源大量、分散接入配电网,传统的负荷模型已无法描述含分布式电源的广义负荷动态特性。针对这一现状,在现有直驱永磁风电机组通用模型的基础上忽略其机械环节,提出直驱永磁风电机组的简化模型。采用综合粒子群方法和Levenberg-Marquardt方法的优化算法,对直驱永磁风电机组简化模型的参数进行了辨识,并针对不同扰动进行了模型适应性分析。在此基础上,将所提风电机组简化模型与传统负荷并联作为广义负荷的模型结构。基于轨迹灵敏度方法,分析了参数的可辨识性及辨识难易度。通过算例,给出了广义负荷在不同电压跌落程度、不同风电接入比例下的参数辨识结果,讨论了配电网等值参数对辨识结果的影响,说明了采用所述建模方法的可行性。
[Abstract]:A large number of distributed power sources, mainly renewable energy, are distributed into the distribution network. The traditional load model can no longer describe the generalized load dynamic characteristics of distributed generation. In view of this situation, the simplified model of direct-drive permanent magnet wind turbine is put forward on the basis of the general model of direct-drive permanent magnet wind turbine, which neglects the mechanical link of direct-drive permanent magnet wind turbine. The parameters of simplified model of direct-drive permanent magnet wind turbine are identified by using the optimization algorithm of integrated particle swarm optimization method and Levenberg-Marquardt method, and the model adaptability analysis is carried out for different disturbances. On this basis, the simplified wind turbine model and the traditional load parallel as the generalized load model structure. Based on the trajectory sensitivity method, the identifiability of parameters and the difficulty of identification are analyzed. Through an example, the parameter identification results of generalized load under different voltage drop degree and different wind power access ratio are given. The influence of distribution network equivalent parameters on the identification results is discussed, and the feasibility of using the proposed modeling method is illustrated.
【作者单位】：河海大学能源与电气学院;国网江苏省电力公司;
【基金】：国家自然科学基金资助项目(51190102)~~
【分类号】：TM614;TM743

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