锦屏二级水电站引水系统水力学问题研究与设计优化

Hydraulic research and design optimization of the diversion system at Jinping Ⅱ hydropower station

建立完整的锦屏二级水电站水力过渡过程计算数学模型,结合引水系统整体物理模型试验,优化引水发电系统总体布置。论证了取消大尺寸的尾水调压室是合适的,合理选择了带有上室的上游阻抗式调压室的断面积,确定了上室底板高程和调压室底板承受的最大设计压力,讨论了锦屏二级水电站采用差动式和其它型式调压井的优缺点,讨论了引水系统水力计算和模型试验误差的影响因素,提高了工程设计人员参与科学研究的水平,节省了工程投资。

By founding integral hydraulic transition process mathematics calculation model, combined with the physical model test, the arrangement of the diversion system was optimized. The rationality of cancellation of large-sized surge chamber was proved, section area of the upstream impedance surge chamber was selected, base plate elevation of the head surge chamber and the maximal design pressure for the base plate of the surge chamber were fixed, the advantage and disadvantage of the differential and other kinds of surge shafts were discussed, as well as the error influence factors inthe diversion system hydraulic calculation and model test were introduced, It saved project investment and enhanced the research ability of the engineers,