澜沧江景洪电站日调节运行方案的研究

Study on the Projects of the Daily Regulation of Jinghong Hydroelectric Station on Lancang River

运用一维非恒定流数学模型对电站日运行方案进行研究:采用Preissmann隐式格式建立一维非恒定流数学模型,通过物理模型试验结果对数学模型计算结果进行了验证,在两者结果吻合较好的情况下,对景洪电站4种日调节工况下澜沧江景洪电站下游约85 km河段的水流条件进行了非恒定流计算,通过景洪电站日调节4种运行工况下的非恒定流特征参数:下游河道水位日变幅、小时变率和20 m in变率,分析景洪电站4种工况的非恒定流水流条件对景洪电站下游河道通航水流条件的影响,得到了对下游河道通航水流条件较小的景洪电站运行工况。

The one dimension mathematical model has been adopted to study the projects of the daily regulation of hydroelectric station., the implicit format of Preissmann has been adopted to solve the equation. The program of one dimension unsteady flow has been worked out. The result of calculation of the program has been verified by the result of the physical model and the coincide well. Under 4 kinds of projects of the daily regulation of Jinghong Hydroelectric Station, the unsteady flow conditions in lower reaches of the dam with the length of about 85km have been calculated by the program. The graph has been adopted to analyze the important characteristic parameters of the unstable flow conditions of 4 kinds of projects ： the range of water level per day, the range of water level per hours and the range of water level per 20 minutes. Finally, the project of the daily regulation of Jinghong Hydroelectric Station which has a smallest influence on the navigable flow conditions has been obtained.