摘要:与双馈交流励磁风力发电系统相比,直驱永磁同步风力发电系统具有结构简单、发电效率及运行可靠性高等优点。本文利用电力系统仿真工具PSCAD/EMTDC为基础,建立了15 MW直驱永磁同步风力发电系统的仿真模型;在低于额定风速下,研究了最佳叶尖速比控制策略下直驱永磁同步风力发电系统的特性,采用空间矢量调制方法实现了风力发电机最大风能跟踪的控制;网侧变换器并网实现了变速恒频和有功功率与无功功率的解耦控制;最后对仿真结果进行分析,验证了控制策略的正确性。 关键词:PSCAD/EMTDC;直驱永磁同步发电机;风力发电;控制策略
Abstract: Compare with AC excitation doubly fed wind energy generation system,direct-drive permanent magnet synchronous wind power system has the advantages of simple structure, power efficiency and high reliability. In this paper, a new generation of electric power system simulation software PSCAD/EMTDC was used as the base, simulation model for 15 MW PMSG wind power generation system was established; Below the rated wind speed, the characteristics of PMSG wind power generation system under the control strategy of the optimum tip speed ratio was studied, Using space vector modulation method, maximum wind power tracking control was achieved; VSCF and the decoupled control of active power and reactive power of nets side converter gridconnected was also achieved. Finally the simulation result was analyzed; to verify the validity of control strategy.. Key words: PSCAD/EMTDC; PMSG; wind power generation; control strategy
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