双馈风力发电机系统的自抗扰神经网络的励磁控制  

Active disturbance-rejection neural networks excitation-control of double-fed induction generator

作　　者：杨苹[1,2] 周少雄[1,2] 胡斌[1,2] 马艺玮[1,2] 

机构地区：[1]华南理工大学电力学院,广东广州510640 [2]广东省绿色能源技术重点实验室,广东广州510640

出　　处：《控制理论与应用》2012年第2期251-256,共6页Control Theory & Applications

基　　金：广东省科技计划资助项目(2010A010200004);广东省教育部产学研结合资助项目(20098090300424);2010年粤港关键领域重点突破招标资助项目(20100107-3)

摘　　要：在双馈发电机传统控制方式的基础上,将自抗扰控制技术和BP神经网络相结合结合,应用于双馈风力发电机并网运行的控制上,提出了一种新的双馈风力发电机并网运行控制方案.该控制方案具有内外两个控制环,内环通过BP神经网络实现双馈风力发电机的转子d-q轴电流控制,外环通过自抗扰技术实现双馈风力发电机定了侧的有功、无功控制.由于自抗扰控制器利用一阶跟踪微分器和扩张状态观测器对系统扰动进行动态跟踪补偿,在此基础上输出双馈电机转了交-直轴电流的参考值,然后将该参考值作为BP神经网络训练样本的输入,训练后的BP神经网络可以更好地逼近实际转了电压输出量.论文设计并实现了该方案的具体控制算法.仿真测试表明:该控制方案具有优良的动态性能,对系统的内外扰动具有较强的鲁棒性,在没有精确的发电机参数情况下依然可实现并网系统的稳定运行.On the basis of traditional control for the doublefed induction generator （DFIG）, the active disturbance rejection method and the backpropagation neuralnetwork control method are cortthined together and applied to the control of DFIG operating in the power grid. The control strategy consists of the internal and external control loops. The internal loop controls the rotor current of DFIG using the back propagation （BP） neuralnetwork controller, while the external loop controls the active power and the reactive power by the active disturbancerejection controller （ADRC）. The ADRC tracks system dynamic disturbances by a firstorder differential tracker （TD） and an extended stateobserver （ESO）, and outputs the reference quadrature current and the direct current of DFIG rotor. Reference values are fed to the BP neural network input for training; the trained BP neural networks precisely approximate the actual rotor output voltage. The algorithm of this strategy is developed and simulated; simulation results show that this strategy is with excellent dynamic performances, and the system is robust to the internal and external disturbances, providing a stable operation for DFIG in the power grid without knowing the exact generator parameters.

关 键 词：双馈风力发电机:励磁控制 自抗扰控制 BP神经网络 

分 类 号：TM315[电气工程—电机]