直驱永磁同步风电机组电磁暂态模型降阶分析

摘要

针对风力发电系统的电磁暂态模型复杂、仿真速度慢,不适合实际工程应用的问题,研究了直驱永磁同步风力发电机组降阶模型.将暂态模型中传动系统模型与变流器模型进行降阶简化,由此得到了直驱永磁同步风力发电系统降阶模型,然后在DIgSILENT仿真软件中搭建详细模型与降阶模型,并通过时域仿真对详细模型与降阶模型的动态特性进行了比较.结果表明,降阶模型与详细模型具有较好的一致性和较高的精度,从而证明降阶模型也适合工程应用.%In view of the disadvantages of the electromagnetic transient model for wind power generation,such as complexity,slow simulation and impracticality of engineering,a reduced model of direct drive permanent magnet synchronous wind power generation is studied.The transmission system model and converter model in the transient generation system are reduced and simplified,thus the reduced model of generation system is obtained.The original detailed model and reduced model are established in software DIgSILENT,and their dynamic characteristics are compared in time domain.The results show that the reduced model agrees well with the original detailed model and the accuracy is relatively higher,indicating that the reduced model is also suitable for engineering applications.