基于自适应观测器的双馈风力发电机控制

为了解决风力发电机系统中位置传感器故障率高的问题,提出了一种基于自适应观测器的速度辨识方案。应用Lyapunov稳定性理论,经过严格推导得出了速度辨识自适应律;利用极点配置得到观测器的增益。以速度估计自适应机构和矢量控制方案设计了无速度传感器双馈风力发电机矢量控制系统。仿真结果表明,自适应观测器无速度传感器控制能够准确获取双馈电机转速与角度信息,响应速度快,具有很好的稳态与动态性能,良好的鲁棒性,并基于此实现了最大功率跟踪控制。

Control of the Doubly-fed Induction Generator for Wind Power Based on Adaptive Observer

In order to reslove the high faults in the positioning sensors of wind power doubly-fed induction generator(DFIG),a speed identification scheme was proposed based on an adaptive observer.By using the Lyapunov stability theory,the speed identification adaptive law was derived strictly.And the gain of the observer was obtained by using pole-placement technique.A speed sensorless field oriented control(FOC) system for doubly-fed induction generator wind turbine was designed by using the speed adaptive estimation scheme and the vector control technique.The simulation results indicate that adaptive observer based sensorless control can obtain accurate speed and phase angle information of DFIG,have fast response,good steady and dynamic performance and good robustness.Maximum power point tracking(MPPT) control is also achieved based on the method.