基于水动力学模型和代理模型的水库动库容精细化计算

Refined Calculation of Dynamic Reservoir Capacity Based on Hydrodynamic Model and Surrogate Model

山区河道型水库存在较大动库容,库容计算不准确使得制定水库调度计划时出现较大偏差。根据水库水面线变化特点引入分段法将水库分段,并结合水动力学模型计算出水库动库容,实现水库动库容的精细化计算。同时针对水动力学模型在调度计划制定的实时计算中所面临的计算效率瓶颈,建立了基于RSMGU和RSLSTM的代理模型。以三峡水库为例,对基于水位—库容曲线所算得的静库容模型,水库动库容与之相比增大了约12%。以2020年汛期#4洪水为例,采用动库容法计算库容,可减小部分下泄流量,进一步发挥水库的防洪兴利能力;发现RSMGU更适合作为水动力学模型的代理模型。

There is a large dynamic reservoir capacity in mountainous channel reservoirs,and inaccurate calculation of reservoir capacity can lead to large deviations in the formulation of reservoir scheduling.This article introduces the segmentation method based on the characteristics of reservoir water surface changes to segment reservoir and calculates the dynamic reservoir capacity with the hydrodynamic model for achieving fine calculation of the dynamic reservoir capacity.In response to the computational efficiency bottleneck faced by hydrodynamic models in real-time calculation of scheduling,a surrogate model based on RSMGU and RSLSTM is established.Taking the Three Gorges Reservoir as the research object,the dynamic reservoir capacity has increased by about 12%compared to the static reservoir capacity model calculated based on the water level storage capacity curve.Taking the#4 flood in 2020 flood season as an example,it is found that using the dynamic reservoir capacity method to calculate the reservoir capacity can reduce partial discharge flow and further enhance the flood control and profitability of the reservoir.Meanwhile,it is found that the RSMGU is more suitable as a surrogate model for hydrodynamic models.