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...

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