佛子岭电站天然河道与人工尾水洞并联研究

Study on parallel connection between natural channel and artificial tailrace tunnel at Foziling Hydropower Station

由于安徽省佛子岭抽水蓄能电站尾水洞长约1.5 km,致使电站运行水头损失大,严重影响电站效益。设计受天然湖泊作调压井的启发,利用电站下游的黄尾河作为溢流式调压井,考虑到溢流口不能受尾水变化的影响需设置较高竖井,故突破惯例将调压井溢流口设置在低于河道尾水处,形成新型的可作为出、进水口的溢流式调压井,使尾水隧洞和天然河道形成并联水道,共同运行。数学模型计算和水工整体模型试验表明:河槽式调压井的设计是合理的;与常规调压井相比,不仅可节省投资500万元,而且还可增加发电量8%,节约抽水电费7%。可供同类工程参考。

Foziling Pumped - storage Power Station in Anhui Province has a 1.5km long tailrace tunnel, resulting in large head loss and reducing power generation benefit. Enlightened by the idea of using natural lake as surge tank, we take the Huangwei River in the downstream of the station as an overflow surge tank. A higher shaft would be needed to prevent the overflow mouth from the influence of tailrace water, so we break the convention to set the overflow mouth lower than the tailrace of channel, forming a new type of overflow surge tank that can be an inlet or an outlet. The design realizes parallel connection between tailrace tunnel and natural channel and joint operation. The numerical calculation and model test show that the channel - type surge tank is reasonable, and compared with a traditional surge tank, the investment could be saved by 5 million Yuan, while the power generation is increased by 8% and the cost of power consumption for pumping water is reduced by 7%.