摘要
传统非线性控制器对系统暂态时的角频率和功角的稳定具有显著效果,但对机端电压的控制却并不理想。为解决这一问题,将状态反馈精确线性化理论和最优控制理论相结合设计了一种非线性最优励磁控制器,并在控制中引入电压反馈,即将具有良好机端电压控制效果的基于电压偏差的PID控制和非线性最优控制相结合设计了一种新型励磁控制器。通过使用Matlab对算例进行仿真,验证了该控制器在小扰动和大扰动情况下不仅能够保证角频率、功角的稳定,还能很好地稳定机端电压,明显改善了传统控制器在机端电压控制方面的缺陷。
Traditional nonlinear controller is good at the control of angular frequency and load angle,but weak at the control of terminal voltage.To solve this problem,a non-linear optimal excitation controller based on exact feedback linearization and optimal control theory is designed.In this design terminal voltage is introduced as a feedback.Because of the introduction of terminal voltage feedback,the controller can stabilize the terminal voltage effectively.The application to an example system using Matlab verifies that in a small disturbance and large disturbance cases this controller can not only ensure the stability of angular frequency and load angle,but also can effectively stabilize the terminal voltage,which remarkably improves the deficiencies in the control of terminal voltage of the traditional excitation control.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2010年第14期110-114,共5页
Power System Protection and Control
关键词
精确线性化
最优控制
励磁控制
电压反馈
MATLAB
exact feedback linearization
optimal control
excitation control
voltage feedback
Matlab
