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中文摘要：
调压室是保证水电站运行稳定性及调节品质的设施，托马公式为调压室尺寸设计的重要依据，其没有考虑调压室内的水流惯性。对于设置了长连接管的高水头电站和抽水蓄能电站，连接管内水流惯性较大，对调压室稳定面积和小波动调节品质均有影响。本文通过理论推导，数值计算和工程实例，证明了考虑调压室长连接管内的水流惯性能够减小调压室的稳定面积，有利于提高小波动的调节品质，得出设计中不考虑连接管内的水流惯性是偏于安全的。
英文摘要：
Surge tank is a structure crucial to the stability of governing system and regulation quality. Thomas critical stable section area is a significant design criteria, but it neglects the effect of water interia in surge tank. This inertia could affect stable section area and governing quality if a surge tank has a long lateral pipe connecting to the intake tunnel, such as in a pumped storage station or high water head hydropower station. By theoretical analysis, numerical computation and engineering example in this paper, it is proved that the water inertia in a surge tank with a long lateral pipe helps to decrease the stable section area and improve regulation quality in small fluctuations and that neglect of water inertia in design is safer.
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