【摘要】 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。更多还原

【Abstract】 Power system exciter was designed using the control theory of uncertain systems to enhance the stability and reliability of power systems in different operational states. If a special instrument can rapidly and accurately reconstruct the information of the plant perturbations of parameter and model and external disturbances, the strong uncertainty of the plant can be transformed to a weak uncertainty by the compensation action of feed back linearisation and feedback “certainfication”. The second step used a robust controller design to build a closed loop control system with excellent robustness. In practice, the nonlinear extended state observer (ESO) was used to compose an auto disturbance rejection controller (ADRC), which was the new result in the field of estimation and control of uncertain systems and became most active both in the field of modern control theory and in engineering applications. The second order nonlinear ADRC exciter for power systems was developed that has simple structure, is easily adjusted, has fast response and high precision. Digital simulation results showed that the system has good stability and damping.更多还原