【摘要】 导出了用于电力系统小干扰稳定分析的水轮机模型和计及弹性或刚性水击时的引水系统模型。通过对长江三峡电力系统低频振荡的计算分析，详细讨论了在不同参数如，水流惯性时间常数和管道反射时间常数下水力系统的三种模型（简化模型、刚性水击模型和弹性水击模型）对电力系统低频振荡分析的影响更多还原

【Abstract】 The dynamic models of hydraulic system used in power system dynamic stability analysis are presented. Different models considering elastic or rigicl hamming are established. Together with the conventioncd models of power system, the power system dynamic stability analytical software is improved. Using the updated software, the low frequency oscillation of Three Gorges power station and the power system interconnected with it is analyzed. The effect of different hydraulic system models on dynamic stability are compared and discussed.更多还原