水轮发电机组励磁系统的自抗扰控制

为了进一步提高电力系统的稳定性，应用自抗扰控制（ADRC）理论对水轮发电机组励磁系统进行设计，将模型的外部扰动和不确定参数的变化作为系统的扩张状态进行实时观测并加以补偿，将输出量与给定信号的误差进行非线性组合，形成外环控制率。通过对三相短路故障状态的动态仿真，并与传统PID控制效果进行对比，结果表明ADRC系统响应快、超调小，对模型的不确定性及外部扰动具有更强的适应性和鲁棒性，进一步提高了系统的阻尼。

Auto Disturbance Rejection Control for Excitation System of Hydro-generator Units

In order to improve the stability of an electric power system, an excitation controller of hydro-generator units is designed by use of the auto disturbance rejection control (ADRC) theory. The external disturbance and uncertain parameter change are regarded as extended states of the system to be observed in real time and compensated for, and the nonlinear combination of the errors between output and given signal is done to form the external controller. The simulation of the three-phase short circuit fault demonstrates that ADRC has rapid response and low overshoot, and it is more adaptable and robust for the uncertainty and external disturbance of the model than the conventional PID controller. It improves the damp of the electric power system.