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运用有调压室的水轮机调节系统数学模型，引入无量纲参数，详细分析了调压室断面积对调节系统稳定域的影响．研究表明，水电站有压输水系统总的水流惯性对调节系统的稳定性是不利的．其校正由调速器和调压室共同完成．调压室断面积对压力管道的水流惯性不起校正作用，须由调速器独自承担．而调速器的缓冲作用却能帮助调压室校正压力隧洞的水流惯性，从而减小调压室稳定断面积．
The mathematical model of the turbine governing system with surge chamber was introduced and the dimensionless parameters were introduced. The influence of the cross-sectional area of the surge chamber on the stability of the control system was analyzed in detail. The research shows that the total water flow inertia of pressurized water conveyance system in hydropower station is unfavorable to the stability of regulating system. The correction is made by the governor and the surge tank. Regulating chamber cross-sectional area of the pressure pipe water inertia can not afford to be corrected, to be borne by the governor alone. However, the buffering of the governor can help the surge chamber to correct the water flow inertia of the pressure tunnel, thereby reducing the stable cross-sectional area of the surge chamber.