摘要
兆瓦级变速恒频风力双馈发电机通过采用定子磁场定向的转子励磁矢量控制策略可以实现跟踪利用最大风能。在分析了风力机的输出功率和发电机转速的关系特性之后,推导了随机风速下实现最大风能跟踪的目标参考值算法,由此得到三种控制模式:转速控制模式、转矩控制模式、功率控制模式,根据三种控制模式的控制性能的分析比较提出了功率控制模式是最优的控制策略。最后利用PSCAD软件建立了双馈风力发电系统的仿真模型,通过在阶跃风速下的仿真比较,结果验证了结论的正确性。
Doubly fed induction generator (DFIG) used in MW-class variable speed constant frequency wind energy generation system can capture wind energy with the highest efficiency by using the stator flux oriented vector control method. Based on the wind turbine characteristics,the arithmetic of the control objective reference values is derived. It is shown three control modes can be used to realize maximum power point tracking which are speed-mode control,torque-mode control and power-mode control. Based on The dynamic and static performances of three control modes analyzed and compared,it is proposed the best control mode is power-mode control. The model of MW-class wind generation system was established by PSCAD in order to simulate the operational performance with wind speed variation. The results show the correctness of the conclusion.
出处
《电气技术》
2008年第5期61-64,共4页
Electrical Engineering
关键词
双馈风力电机
最大风能跟踪
转速控制模式
转矩控制模式
功率控制模式
doubly fed induction generator
maximal wind energy tracking
speed-mode control
torque-mode control
power-mode contro
