一种新型自校正PID励磁调节器的研究

Self tuning PID excitation regulator for synchronous generators

提出了一种新型的同步发电机自校正比例－积分－微分（ＰＩＤ）励磁调节器。该调节器以加权的多变量（电压偏差加转速偏差）作为反馈信号，运用最小二乘估计在线辨识同步发电机的参数以及零－极点配置的设计方法，实时改变ＰＩＤ调节器的增益系数ｋＰ，ｋＩ，ｋＤ，从而实现同步发电机励磁的自适应优化控制。数字仿真计算结果表明，自校正励磁调节器能够自动适应同步发电机运行条件及网络结构的变化，可以获得比恒定增益的ＰＩＤ励磁调节器更好的发电机端电压和功角的响应特性。

A new self tuning proportional integral derivative (PID) excitation regulator for synchronous generators is proposed in this paper. A weighted multivariable feedback and pole zero placement design method employed. It also utilizes the recursive least squares algorithm for estimating the model parameter. The gains k P, k I, k D of self tuning PID excitation regulator are dynamically changed to realize adaptive control of synchronous generator. Results from the digital simulation show that the proposed self tuning PID regulator can yield better characteristics than the fixed gain PID regulator when both the operating condition of generator and network construction are changed.