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为了提高电力系统在各种工况下的稳定性和可靠性 ,采用不确定性控制理论设计了励磁控制器。通过建立一种装置来实时、迅速、准确、简单地获取不确定性受控对象的参数模型摄动及未知外扰作用的信息。再通过补偿作用来实现反馈线性化和反馈“确定性化”,将强不确定性对象化为弱不确定性。最后安排常用的鲁棒控制器 ,以获得鲁棒性更强的闭环控制系统。实际上在不确定性系统的估计和控制中得到广泛发展和应用 ,成为当代控制理论前沿十分活跃的基于扩张状态观测器 ( ESO)的自抗扰控制器 ( ADRC)是这方面的最新成就。论文用这个理论而特殊设计的 2阶电力系统非线性自抗扰励磁控制器结构简单、调整容易、响应快、精度高 ,数字仿真研究结果表明它可进一步提高电力系统的稳定性和阻尼力。
In order to improve the stability and reliability of the power system in various operating conditions, the excitation controller is designed using the uncertainty control theory. By establishing a device to obtain the information perturbation of the parametric model of the controlled object under uncertainty and the effect of unknown interference in real time, quickly, accurately and simply. And then through the compensation effect to achieve feedback linearization and feedback “deterministic”, the strong uncertainty object into weak uncertainty. Finally, a commonly used robust controller is arranged to obtain a more robust closed-loop control system. Actually, it has been widely developed and applied in the estimation and control of uncertain systems. It is the latest achievement of ADRC based on Extended State Observer (ESO), which is very active in contemporary control theory. In this paper, the nonlinear reactive immunity excitation controller of 2-order power system specially designed with this theory has the advantages of simple structure, easy adjustment, fast response and high precision. The numerical simulation results show that it can further improve the stability and damping force of the power system.