大渡河丹巴水电站上游调压室水力学研究

Hydraulics study on upper surge tank of Danba hydropower station in Dadu river

大渡河丹巴水电站调压室托马稳定断面面积大、涌波振幅大、波动衰减时间长、同一水力单元的相邻机组水力干扰情况严重。通过研究,明确了调压室小波动稳定性的控制标准、托马稳定断面的主要影响因素、研究了不同调压室布置方案在抑制涌波振幅、加速涌波衰减时间、相邻机组水力干扰程度等方面的差别,初步确定了调压室布置方案及机组运行方式。

The surge tank of Danba hydropower station has situations of big Thomas stable section area, large surge wave amplitude, long fluctuation attenuation time and large hydraulic disturbances between adjacent machine sets in the same hydraulic unit. Through the analysis, the paper makes clear the control standards of small surge stability and main factors of the Thomas stable section, studies the differences among each disposal in surge wave amplitude inhibition, surge wave attenuation acceleration and hydraulic disturbance between adjacent machine sets, preliminary determines the layout scheme of the tank and the unit operation mode.