同步发电机的非线性状态PI附加励磁控制

为解决电力系统的强非线性和不确定性问题，避免反馈线性化励磁控制器由于数学模型的误差而影响控制器性能的缺点，利用非线性状态比例积分PI控制理论设计了同步发电机附加励磁控制器，所得的控制规律与系统运行点和网络结构完全无关，同时控制器本身结构简单。仿真计算表明所设计的附加励磁控制器对系统运行点的变化具有良好的适应能力，可以有效地改善系统的稳定性。

Design of additional excitation controller for synchronous generator with nonlinear state PI control

To deal with the strong nonlinear and uncertain characteristics of the power system,an additional excitation controller is designed with nonlinear state PI (Proportion Integration)control theory.It overcomes the excitation controller's shortcoming of feedback linearization, which is caused by the mathematical model error,and affects the controller's performances.The proposed control law is completely independent on operation condition and the net structure of power system,and the structure of the proposed controller is simple.The simulation suggests that it has an excellent adaptability to the variety of system operation condition and improves power system stability effectively. This project is under the Sponsorship of Petroleum University's Doctor Scientific Research Fund(Y010502).