多机系统PID分散协调控制的研究

Research on PID Coordinated Excitation Control

从实际励磁控制模型出发,将机端电压及其微分作为输出反馈量,建立发电机及其控制器数学模型,通过求解Levine-Athans矩阵方程组,设计了PID分散协调励磁控制器,其结果可直接应用于电力系统现有PID控制器的参数整定;另外,对传统权矩阵优化算法中存在的不足给予了改进,使权矩阵优化算法更易实现且更可靠。文章是电力系统分散协调控制理论的进一步完善及补充,在无须改变原有控制器结构的前提下实现最优协调控制,更具现实意义。最后,经计算与仿真证明提出的方法是正确的、有效的。

Based on the actual model of excitation controller, a new PID excitation controller is designed according to the coordinated theory. The mathematic model is established through feed backing deviation of generator voltage and the differential calculus of deviation. The result of this controller can be obtained after calculating Levine-Athans equations, and applied in power system directly. Some shortcomings in current optimization methodology of weight matrix are discovered, and the improvement method is given. The original structure of controller needn＇t be changed when the new PID controller is applied in power system. Calculation and simulation prove the validity of this controller.