Method and device for predicting on-way attenuation change of daily regulating wave of hydropower station

By simplifying the process of solving the one-dimensional water flow motion equation of open channels, predicting the attenuation changes of the daily regulated wave along the hydropower station, the problems of high modeling costs and long cycles in the existing technology are solved, and fast and simple daily regulated wave prediction and shipping scheduling are achieved.

CN119692220AActive Publication Date: 2025-03-25WUHAN UNIV
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Patent Information

Application Number
CN202411598215.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-11
Publication Date
2025-03-25
Estimated Expiration
2044-11-11

AI Technical Summary

Technical Problem

When predicting the attenuation changes of the daily regulation waves in hydropower stations, the prior art relies on detailed river terrain data and expensive test and computing equipment, resulting in high modeling costs and long cycles, high professional level requirements for technicians, and it is difficult to quickly and easily conduct impact assessment and shipping scheduling.

Method used

A process of simplifying the solution of the one-dimensional water flow motion equation of open channels is proposed. By selecting several sections, terrain data and water level-flow relationship curves are obtained, hydraulic parameters under different characteristic flow rates are calculated, and the amplitude attenuation factor and hysteresis phase angle of the daily regulated wave are predicted, and the attenuation distance of the daily regulated wave is obtained.

Benefits of technology

It realizes fast and simple calculation of the amplitude, phase, and additional ratio reduction of the daily regulated wave waves, reduces data demand and calculation volume, improves the simplicity and reliability of the application, and is suitable for the prediction and shipping scheduling of daily regulated waves in hydropower stations.

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Abstract

The invention provides a method and device for predicting on-way attenuation change of daily regulating waves of a hydropower station, and the method comprises the steps: selecting N section positions in a possible influence range of the daily regulating waves of the hydropower station for a target river reach, dividing the river reach into N-1 sub-river reaches, and obtaining the topographic data of each section, a daily average water level-daily average flow relation curve of each section in the target river reach is drawn, hydraulic parameters of each sub-river reach under different characteristic flows are obtained, and daily regulation wave attenuation distances under different dispatching working conditions are obtained based on the hydraulic parameters of each section under different characteristic flows; and obtaining the daily regulation wave influence amplitude and influence opportunity of the specific position under different scheduling conditions. Based on the characteristic that the amplitude of the daily regulating wave is relatively smaller than the water depth of the river channel, the invention provides a simplified process for solving the one-dimensional water flow motion equation of the open channel, so that the influence of the daily regulating wave on the downstream channel can be quantitatively predicted, and the method has the characteristics of small data demand and calculation amount, simplicity and convenience in application, high reliability and convenience in popularization.
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