双馈风力发电系统最大风能捕获控制研究

针对应用于风力发电系统的双馈异步发电机,构建了同步旋转坐标系下的数学模型.结合风力机 输出功率与转速关系,采用速度负反馈控制代替有功功率负反馈控制,简化了调节器参数的工程设计过程.将有功和无功控制上的耦合项通过前馈补偿实现了基于定子磁链定向的功率解耦控制.利用双馈异步电机运行可逆性,通过双馈发电机运行状态的转换实现了风速跟踪控制过程中最大风能捕获的快速跟随性能.基于仿真软件构建仿真模型仿真进行了双馈风力发电机组最大风能捕获控制和功率解耦控制的仿真验证,仿真结果表明了所设计控制策略和参数的正确性与有效性.

Maximum Wind Energy capture of Doubly-fed Wind Power Generating System

According to the doubly fed induction generator used in wind power generation system, the mathematical model of synchronous rotating coordinates is established Combining wind turbine output power and speed, the engineering design process of regulator parameters are simplified by using speed negative feedback control instead of active power negative feedback control The power decoupling control based on stator flux oriented is realized by the coupling term feed forward. According to the reversible principle of doubly-fed induction generator, the fast tracking performance of maximum wind energy capture is realized Based on simulation software, simulation model of doubly-fed induction generator is build and Control theory is verified in maximum wind energy capture control and power decoupling control. The correctness and validity of the control strategy and design parameters are proved by simulation results.