Hydropower station peak regulation discharge amplitude prediction method based on water level amplitude variation control

Abstract

The invention discloses a hydropower station peak regulation discharge amplitude prediction method based on water level amplitude variation control. The method comprises the following steps: simulating a non-constant flow process in a river channel by adopting a one-dimensional Saint-Venant equation set; solving the water level of each station along the downstream river channel of the hydropower station at each moment, and calculating the water level amplitude of each station along the downstream river channel of the hydropower station; establishing a function relationship between the peak regulation discharge amplitude of the hydropower station and the water level amplitude of the downstream navigable river reach; and substituting the water level variable amplitude of the downstream navigable reach required by shipping into the function relationship to obtain the peak regulation discharge amplitude of the hydropower station meeting the water level variable amplitude control requirement of the downstream navigable reach. According to the method, through one-dimensional non-constant flow simulation calculation, the correlation between the peak-load discharge amplitude of the hydropower station and the water level amplitude of the downstream navigable reach is established in advance, and then the water level amplitude control requirement of the downstream navigable reach is directly converted into the peak-load discharge amplitude of the hydropower station, so that clear constraint conditions are provided for dispatching of the hydropower station; the target of real-time and flexible dispatching of the hydropower station is achieved.

Description

technical field [0001] The invention belongs to the technical field of peak regulation and dispatching of hydropower stations, and in particular relates to a method for predicting peak regulation and discharge range of hydropower stations based on water level variable amplitude control. Background technique [0002] Peak shaving of hydropower stations refers to the work of turning on the hydraulic turbines to bear part of the power load of the power grid during the peak period of power consumption. The peak shaving of hydropower stations usually leads to changes in the daily discharge process of hydropower stations, causing unsteady flow and water level fluctuations in downstream rivers. Especially in the river sections of high mountains and valleys, affected by complex river conditions and huge installed capacity, the peak regulation of hydropower stations often causes the water level of the downstream river to rise and fall steeply, and the water level can vary by up to 8-...

AI Technical Summary

Problems solved by technology

It can solve the problem that the shipping constraints are difficult to be accurately given when solving the peak-shaving dispatching model of hydropower stations in special cases (such as cascaded canalized river sections in mountains and valleys), and improve the accuracy of the model solution; in addition, the water level amplitude control requirements can be directly transformed into hydropower stations The range of peak shaving and discharge is conducive to the real-time dispatch of hydropower stations and ensures the safety of shipping in the downstream reaches of hydropower stations

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