摘要
为明确水力系统对电力系统动态稳定性的影响,在不同精度的引水系统模型下,用数学推导和物理分析相结合的方法,导出了适用于电力系统小干扰稳定分析的多机系统线性化模型;比较和讨论了简化模型、刚性或弹性水击时的水力系统对水电站单机无穷大系统低频振荡的影响,结论为水力系统模型的精度对系统小干扰稳定性有较大的影响,为考察水力系统的动态特性在小干扰稳定中的作用提供了参考。
In order to make clear and definite the effect of hydraulic system on power system dynamic stability, based on different models of hydraulic system, the linear model of multiple-machine used in power system dynamic stability analysis are presented, using both mathematics and physics analysis. Considering different hydraulic system models such as simple, elastic or rigid water-hammer, the effect on low frequency oscillation in the single-machine infinite bus system are compared and discussed. The results showed that the precision of hydraulic system models do great effect on power system dynamic stability, which provides reference for studying the effect of dynamic characteristics of hydraulic system on dynamic stability.
出处
《水力发电》
北大核心
2007年第3期80-83,共4页
Water Power
基金
湖北省教育厅科学研究计划项目(Z200513001)
关键词
线性化模型
刚性水击
弹性水击
小于扰稳定
linear model
rigid water hammer
elastic water hammer
dynamic stability
