基于模糊控制理论的水轮发电机组调速器侧PSS研究

Study of Power System Stabilizer for Hydro-generator's Governor Based on Fuzzy Theory

由于引水系统的水锤效应和水轮机的强非线性特性,水轮发电机组采用常规调速控制对于改善电力系统稳定性难以取得满意的效果.采用水力系统弹性水击模型和同步发电机非线性模型,基于模糊控制理论设计了水轮发电机组调速器侧模糊电力系统稳定器(FGPSS),应用SIMULINK对其效果进行了仿真研究.结果表明,FGPSS能够较好地改善机组的动态性能,具有较强的鲁棒性.

The effect for power system stability improvement by using the conventional hydrogenerator governor isn't satisfied because of the hydraulic system's waterhammer effect and intense nonlinearcharacteristic.Based on the fuzzy control theory,this paper designs a fuzzy governor power system stabilizer(FGPSS) for the hydroturbine generator considering the elastic water hammer mode of hydraulic system and nonlinear model of synchronous generator.Simulation studies are performed with the aid of the SIMULINK.The simulation results indicate that the FGPSS can improve the dynamic quality of hydrogenerator unit,and has strong robustness.