水力系统对低频振荡的影响

针对目前水力系统、机械系统及电力系统都被独立地研究而有可能会使它们之间的相互影响被简化的现状，以单机无穷大系统为例，给出了适用于小干扰分析的4种水力系统以及电力系统各部分的数学模型，讨论了系统3种振荡模式与状态变量之间相关性以及特征值关于其他参数的灵敏度，并进一步分析比较了不同水力系统模型及参数对水力系统及转子振荡阻尼的影响。结果表明了转子振荡模式与水力系统振荡模式之间的相关性。

The Influence of Hydraulic System on Low Frequency Oscillation

In the current research work,hydraulic system,mechanical system and power system are studied separately by som e researchers in their own fields and the results are that the interactions of three system s are simplified improperly.This paper introduces four models of hydraulic system and power system which are suitable to the sm all disturbance analysis. Based on single- machine infinite bus system,the relativity concerning system oscillation m ode to state variables and sensitivity concerning eigenvalue to other parameter setting are discussed. Furtherm ore,the influence of different hydraulic system models and parameters on hydraulic system and rotor oscillation damping is studied.The conclusions show the pertinence between the oscillation modes of power system and hydraulic system .