瀑布沟及下游泥沙优化调度实施与效果分析

Study on Practice and Performance of Optimized SedimentScheduling over Pubugou and Downstream Reservoirs

通过建立一维水沙数学模型,分析不同水位和流量级下瀑布沟-龚嘴-铜街子联合调度方案排沙效果。结果表明:利用瀑布沟-龚嘴-铜街子三库联合调度造峰排沙效果优于龚、铜两库独立调度排沙。适当抬高库区运行水位有助于提高发电效益,降低运行水位有助于提高排沙效果。从兼顾梯级水库联合排沙效果,适当提高龚、铜运行水位的经济运行方面综合考虑,采取龚、铜两库优化方案2联合瀑布沟水库造峰4500 m^(3)/s的排沙方案效果最为适宜。

Through establishing one-dimensional mathematical model for water and sediment,this paper analyzes sediment removal performance of joint scheduling scheme of Pubugou-Gongzui-Tongjiezi reservoirs under different water and flow levels.The study shows that joint scheduling of Pubugou-Gongzui-Tongjiezi reservoirs is better than independent scheduling schemes of Gongzui and Tongjiezi reservoirs.Appropriate raising of operating water level of reservoir improves generation efficiency,and lowering operating water level improves the sediment removal performance.Taking into account joint sediment removal performance of cascade reservoir and economic operation owning to appropriate increase of operating water level of Gongzui and Tongjiezi reservoirs,joint scheduling of the optimized sediment removal scheme No.2 of Gongzui and Tongjiezi reservoirs and that of Pubugou reservoir when peaking 4500 m3/s is adopted.