同步发电机励磁控制器设计

Design of excitation controller of synchronous generator

针对基于开环迭代学习控制的同步发电机励磁控制器存在稳定性差、易受干扰影响、不能完全跟踪期望轨迹的问题,设计了一种基于开闭环PID迭代学习控制与电力系统稳定器结合的同步发电机励磁控制器;在开环迭代学习控制的基础上,引入闭环反馈控制,将上一次的输入和输出误差及当前的输出误差作为当前的控制输入,从而构成开闭环PID型迭代学习控制;同时,利用电力系统稳定器提供的附加正阻尼信号来改善同步发电机励磁控制系统的电压稳定性和功角稳定性。仿真结果表明,该励磁控制器具有较强的鲁棒性,提高了系统稳定性。

In view of problems of poor stability, easy to be influenced by interference and bad tracking of desired trajectory existed in excitation controller of synchronous generator based on open-loop learning control, an excitation controller of synchronous generator based on open-closed-loop PID lteratlve lteratlve learning control and power system stabilization was designed. A closed-loop feedback control was introduced based on open-loop iterative learning control, current control input was obtained by the last error of input and output and current output error, so as to constitute open-closed-loop PID iterative learning control. Meanwhile, additional positive damping signal provided by power system stabilization was used to improve stability of voltage and power angel of exicitation control system of synchronous generator. The simulation result shows that the excitation controller has strong robustness and improves stability of the system.