三峡-葛洲坝两坝间动库容概化计算研究

Generalized calculation of dynamic storage capacity between Three Gorges Reservoir and Gezhouba Reservoir

三峡-葛洲坝两坝间水库属于河道型水库,在进行水库优化调度时,需要对动库容及其影响因素进行计算和研究。以2015~2019年两坝间水位平稳时的水位、流量资料为基础,对两坝间动库容进行概化计算,并分析其影响因素。结果表明:在水位平稳情况下(葛洲坝5号站水位不变),两坝间动库容与入库流量和5号站水位有关,且相关性极高。在入库流量不变时,两坝间动库容与5号站水位相关性不高,尤其在大流量情况下,相关性较低。研究结果可为葛洲坝水电站发电计划的制作及修改提供参考。

The reservoir between Three Gorges Dam and Gezhouba Dam is the channel-type reservoir.In the optimal dispatch of the reservoirs, it is necessary to calculate and study the dynamic storage capacity and its influencing factors.Based on the data of the water level and flow from 2015 to 2019 when the water level between the two dams was stable, the generalized calculation of dynamic storage capacity between two dams was carried out and the influencing factors were analyzed.The results showed that under stable water level(the water level of Gezhouba No.5 Level Station remained unchanged),the dynamic reservoir capacity between the two dams was related to the inflow and the water level of No.5 Level Station, and the correlation was extremely high.When the inflow unchanged, the correlation of the dynamic reservoir capacity between the two dams and the water level of No.5 Level Station was not high, especially in the case of large inflow, the correlation was relatively low.The research results can provide reference for the preparation of the power generation plan of Gezhouba Hydropower Station and the accuracy improvement of plan modification.