设调压室的水电站机组频率波动特征

设调压室水电站机组频率波动过程受到压力管道高频水击压力波和调压室内低频水位波动的影响.通过理论分析及数值模拟方法分析了此频率波动的特点.计算及分析结果表明:在负荷变化和扰动过程中,设调压室水电站机组频率波动可以分为主波和尾波,主波由压力管道内水流惯性所决定,衰减快;尾波发生在主波之后,是调压室水位波动引起的强迫性周期振荡,衰减慢.

Frequency fluctuations features of hydropower stations with surge tank

The process of frequency fluctuation in the hydropower station with surge tank is impacted both by high-frequency water pressure wave and low-frequency water level fluctuation in surge tank.This article analyzes the frequency fluctuation features by using the methods of theoretical analysis and numerical computation.The results of calculation and analysis show that:for the hydropower station with surge tank,the frequency fluctuation in the process of power disturb can be divided into major wave and stern wave,major wave which is caused by fluid inertia in the penstock attenuates quickly;stern wave which is forced periodic oscillation caused by water level fluctuation in surge tank occurs behind major wave and attenuates slowly.