清江来水对葛洲坝水电站调度策略影响研究

葛洲坝水电站调度难点主要在于下游水位变化的不确定性，下游水位极易受到清江来水的顶托影响。为探索清江来水的顶托作用对葛洲坝水电站调度策略的影响，利用实测水文数据统计分析清江来水对宜昌水文站的顶托影响量，并据此分析水电站的损失出力。结果表明：清江来水对宜昌站的顶托作用随着清江来水的增大而增大、随着宜昌站流量的增大而减小，电站损失出力随着清江来水的增大而增大、随着出库流量的增大而先增大后减小，当出库流量为满发流量时达到最大损失出力值。研究成果可为葛洲坝电站调度策略提供参考，实际调度还需要结合三峡水库联合调度，优化水位控制，综合制定调度决策。

Impact of Qingjiang River inflow on the Gezhouba Hydropower Station scheduling strategy

The scheduling of the Gezhouba Hydropower Station is challenged by the uncertainty of the changes of downstream water level, as it is susceptible to backwater effect caused by the inflow from the Qingjiang River. In order to identify the impact of the backwater effect on the Gezhouba Hydropower Station scheduling strategy, we analyzed the extent of the backwater effect of the Qingjiang River inflow on the Yichang Hydrological Station based on the monitored hydrologic data, and in turn identified the loss output of the hydropower station. Results show that the backwater effect of the Qingjiang River inflow on Yichang Hydrological Station increased with the increase of the inflow, but decrease with the increase of the water flow in the Yichang Hydrological Station. Meanwhile, the loss output of the hydropower station increased with the increase of the inflow, whereas experienced increase-to-decrease transition with the increase of the discharge flow, and reached its maximum when the discharge flow was at full capacity. Study results is conducive to the decision-making of scheduling strategies for the Gezhouba Hydropower Station. However, the actual formulation of its scheduling strategy should take the joint regulation of the Three Georges Reservoir and optimization of water level control into consideration.