双馈风力发电机的内模控制器设计

摘要

针对双馈风力发电机(DFIG)中普遍存在的功率耦合问题,设计了一种基于内模原理的电流控制器.首先介绍了内模控制(IMC)理论的系统结构,在此基础上推导出双馈风力发电系统的传递函数,并建立基于内模控制的电流内环数学模型;其次,内模控制器的参数整定参考系统的平方积分误差值,其鲁棒稳定性参考M值的大小;最后利用Matlab仿真平台进行了仿真实验.结果表明,该控制器实现了系统有功和无功的充分解耦,并具有较好的稳态和动态性能.%In order to solve a common problem of power coupling in double fed induction generator(DFIG),a current controller based on IMC(intemal model control) theory is designed.Firstly,the system structure of IMC is introduced,then the transfer function of DFIGs is deduced,and the mathematical model of current inner loop based on IMC is established.Secondly,the parameter setting of IMC controller is decided by integrated squared error(ISE) value and the robust stability is decided by M value.Finally,the simulation experiment is carried out by using Matlab.The results indicate that this controller achieves the decoupling between the system active power and reactive power,also the system's dynamic and steady performances are improved.