同步发电机的非线性 PID 励磁控制

NONLINEAR PID EXCITATION CONTROLLER OF SYNCHRONOUS GENERATOR

章文将一种非线性ＰＩＤ控制方法引入发电机的励磁控制。该方法通过引入非线性跟踪微分器和ＰＩＤ控制信号的非线性组合，改善了常规ＰＩＤ受一点线性化所产生的缺陷，又保留了常规ＰＩＤ结构简单，鲁棒性强的特点。在计及发电机角速度误差信号和机端电压误差信号的目标函数基础上，ＰＩＤ参数用ＩＴＡＥ法对以变量Δω设计的控制器进行优化，改善了机端电压的品质。该励磁控制方式鲁棒性强，控制品质好，有利于提高系统的暂态稳定性。

This paper presents a new model of generator excitation controller into which the combination of nonlinear PID theory and nonlinear tracking differentiator is introduced. The new controller inherites the advantages of traditional PID regulator such as single structure, strong robustness and adaptability to different plants, but not the disadvantages derived from the linearization of single point. The parameters of the controller is optimized using the ITAE function and the stability of generator terminal voltage is improved. Digital simulation shows that the nonlinear PID excitation controller is effective.