Cascade reservoir short-term optimal scheduling method and system coupled with riverway hydrodynamic processes

Abstract

The invention discloses a cascade reservoir short-term optimization scheduling method and system coupled with riverway hydrodynamic processes and belongs to the field of reservoir power generation scheduling in reservoir scheduling. The method comprises the steps that: S1, a one-dimensional hydrodynamic process calculation method is used for describing the hydraulic connection of a cascade reservoir, the maximum power generation capacity of a cascade hydropower station serves as an objective function, and a cascade reservoir short-term optimal scheduling coupling model based on hydrodynamic reservoir inflow evolution is constructed; and S2, for the hydraulic connection, the coupling model is solved by using a DPSA-POA algorithm, so that the optimal scheduling result of the cascade reservoir can be obtained, wherein the scheduling result comprises a dam upstream water level process, a reservoir discharge flow process and an output process. According to the method, the waterpower relationship of the cascade reservoir is described by using the riverway one-dimensional hydrodynamic process calculation method, so that the aftereffect influence of water flow hysteresis can be eliminated,the reservoir inflow process of the downstream reservoir can be calculated more accurately; and therefore, a reservoir water level result obtained by optimization is more reasonable, and cascade water energy utilization efficiency is improved.

Description

technical field [0001] The invention belongs to the field of reservoir power generation dispatching in reservoir dispatching, and more specifically relates to a cascade reservoir short-term optimal dispatching method and system coupled with river channel hydrodynamic process. Background technique [0002] Compared with the medium- and long-term dispatching of cascade reservoirs, the short-term optimal dispatching needs to consider the flow propagation law between reservoirs, and the existence of water flow lag makes short-term dispatching a problem with aftereffects. How to accurately quantify the hydraulic connection between reservoirs in order to obtain a dispatching plan with more guiding value is one of the focuses of short-term optimal dispatching research. [0003] In the field of reservoir dispatching, we can call the corresponding relationship between the outflow of the upstream reservoir and the inflow of the downstream reservoir the hydraulic connection. The descr...

AI Technical Summary

Problems solved by technology

When the watershed area is large and long-series data are scarce, the black-box mapping model often obtains large errors in training results, which cannot meet actual production needs.

Images