永磁直驱机组的模拟风力机系统设计的几个关键问题  

Key Issues on Designing the Wind Turbine Simulator for Direct-drive PMSG Wind Power System

作　　者：周宏林[1] 于海坤[1] 吴小田[1] 代同振[1] 况明伟 

机构地区：[1]中国东方电气集团有限公司中央研究院,四川成都611731

出　　处：《电气传动》2015年第2期25-29,共5页Electric Drive

摘　　要：为了保证被测的永磁直驱型风电系统实现最大风能跟踪和全功率发电,指出了背靠背变流器、永磁同步发电机、感应电机、变频器、以及风力机机械特性模拟器等各环节的设计要点。通过理论与实例分析指出,背靠背变流器直流母线电压以及永磁同步发电机定子电流约束使永磁同步电机在一定转速下输出功率存在上限。模拟风力机械特性模拟器的参数设计应保证风力机在整个运行范围内,始终位于永磁同步电机最大出力曲线的下方。为此,给出了风力机机械特性模拟器参数的设计方法并最后通过设计实例验证了设计的可行性。In order to simulate the full-range operation of a direct-drive PMSG（permanent magnetic synchronousgenerator）wind power generation system,the key points in designing the wind turbine simulator was presented,including：the back-to-back converter,the PMSG,the induction machine,the inverter and the turbine characteristicsimulator. Theoretic analysis and example illustrated that,constrained by the DC- link voltage of the back- to- backconverter and the stator current of the PMSG,the PMSG has an upper limit in power production at a given speed.Therefore,the design of the turbine characteristic simulator should guarantee that the operation curve the wind turbinebe always constrained by the maximum power limit curve of the PMSG. To achieve this,its design method was givenand verified by a design example.

关 键 词：模拟风力机 永磁直驱 永磁同步电机 弱磁控制 最大风能跟踪 

分 类 号：TM614[电气工程—电力系统及自动化] TM761