老挝南俄5水电站引水系统调压室体型优化

The Optimization of the Shape and Configuration of the Surge Chamber of the Power Tunnel System of the Nam Ngum 5 Hydropower Plant in Laos

老挝南俄5水电站引水发电系统长约10km,为保证运行安全,设置了上游调压井。建立水电站引水发电系统水力过渡过程数学模型,在保证电站运行稳定性要求的基础上,对上游调压室的上室、大井、阻抗孔等体型尺寸进行设计优化。优化方案在减少大井与上室工程量的同时,调压室的最高最低涌浪水位仍有足够的安全裕量。为水电站安全运行提供了保障。

The power tunnel system of the Nam Ngum 5 hydropower plant is 10kin long and an upstream surge shaft is provided to ensure its safe operation. The design of the configurations and the dimensions of the upper chamber, the well and the impedance hole of the upstream surge shaft was optimized in the premise of satisfying the requirement for operation stability of the hydropower plant by establishing the hydraulic transition process mathematical model of the power tunnel system of the hydropower plant. The optimized design ensures that while the construction quantities of the well and the upper chamber were re- duced both the highest and the lowest surge water levels still have enough safe margin in the surge cham- ber. Thus the safe operation of the hydropower plant is guaranteed.