基于稳定性和电压精度协调控制的新型模糊励磁调节器

Fuzzy excitation controller based on coordinative control of voltage precision and system stability

在保持比例积分微分(PID)励磁调节器优良电压调节特性的基础上,部分采取线性最优控制理论设计附加励磁调节通道,并通过一模糊控制器动态协调电压调节通道和附加调节通道的作用权重,设计了一种新型模糊励磁调节器。分析了电力系统各种典型运行状态及其对励磁调节的要求,总结了不同状态下电压和稳定的协调控制策略,以期对电压调节和增强阻尼进行动态协调。数值仿真结果表明,该新型励磁调节器在稳态时具有同PID一样高的电压调节精度,动态过程中则能明显提高系统阻尼特性,具有满意的控制效果,并对系统工况变化具有一定适应性。

A new excitation controller design is proposed,which keeps excellent features of PID （Proportional Integral Derivative）control for voltage regulation and adds linear optimal control in excitation regulation,with their weights dynamically coordinated by a fuzzy controller. Different operating conditions as well as their requirements for excitation regulation are analyzed and control strategies dynamically coordinating voltage precision and system stability under all conditions are concluded for voltage and damping control. Numerical simulations show that,the designed excitation controller possesses the voltage regulation precision as that of PID controller in steady state,improves the system damping performance in dynamic state and obtains satisfying control effect.