基于观测器的单次测量风能转换系统LQR

Van‐Phong Vu, T. Do
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引用次数: 4

摘要

风能转换系统中的控制系统是通过调节发电机转子转速来跟踪最优功率的。在本文中,我们提出了一种新的观测器,不仅可以估计风能转换系统中的气动扭矩,还可以估计d轴和q轴电流。因此,在本文提出的控制系统中,只需要测量发电机的转子转速。值得注意的是,这是第一次,这样的控制系统可以做到风能转换系统。为了形成一个完整的控制系统,我们使用线性最优控制方法来跟踪发电机的最优轨迹。本文采用的是永磁同步发电机。此外,利用李亚普诺夫理论和平方和技术,在主要定理中推导了观测器综合的条件。仿真结果表明,在风速和定子电流未知的情况下,采用鲁棒观测器的控制系统能够有效地跟踪转速基准。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Observer-Based LQR for Wind Energy Conversion Systems with Single Measurement
The control system in wind energy conversion systems is used for tracking the optimal power via regulating the rotor speed of the generator. In this paper, we proposed a novel observer for estimating not only aerodynamic torque in wind energy conversion systems, but also d-axis and q-axis currents. Therefore, in the proposed control system, only the rotor speed of the generator is required to be measured. It should be noted that this is the first time, such a control system can do that for wind energy conversion systems. To form a complete control system, we use linear optimal control method for tracking the optimal trajectory of a generator. In this paper, the permanent magnet synchronous generator is used. In addition, on the basis of the Lyapunov theory and Sum-Of-Square technique, the conditions for observer synthesis are derived in the main theorem. The simulation results show that our control system with proposed robust observer can effectively track the speed reference in the conditions of unknown wind speed and stator currents.
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