Method for accurately detecting discharge by using opening degree of sluice radial gate of hydropower station

Abstract

The invention provides a method for accurately detecting discharge by using opening degree of a sluice radial gate of a hydropower station and belongs to the field of discharge measurement and evaluation of a hydraulic structure. The equipment and method for actually detecting a relation between the opening degree of the radial gate of a discharge structure of a hydropower station and the discharge comprise the following steps: first, determining arranging positions of pressure measuring points, the number of the measuring points and altitude scale of a free water surface according to actual hydraulic structure shape and discharge section flow state; assembling a testing equipment bracket; placing the bracket by using an overhauling gate groove; establishing a real-time measuring point water pressure collecting system according to a pressure sensor, a collector and a signal conversion system, so as to collect and analyze data of the section of the gate groove; and obtaining measuring point flow speed distribution real-time information of the section of the gate groove according to an analysis result of the collected data, so as to obtain accurate data of the opening degree of the radial gate and the discharge. The relation between the opening degree of the radial gate of the discharge structure and the discharge is provided, and an analysis basis is provided for flood regulation and flood discharge decision of flood prevention departments and power plants.

Description

technical field [0001] The invention relates to a method for accurately measuring discharge flow by using the opening degree of a discharge arc gate of a hydropower station, which belongs to the field of discharge measurement and evaluation of hydraulic structures. Background technique [0002] At present, empirical formulas and model tests are usually used to analyze the relationship between the opening of the arc gate of the discharge structure of the hydropower station and the flow rate of the discharge structure. However, the empirical formula adopts the simplified calculation formula of constant flux, which cannot consider the influence of the free water surface, the influence of the actual shape of the hydraulic structure, and the influence of the gate opening process; the model test method cannot satisfy all the similar laws, resulting in errors in the conclusion of the model test. consistent with the actual results. The deficiencies of the above-mentioned methods an...

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Problems solved by technology

However, the empirical formula adopts the simplified calculation formula of constant flux, which cannot consider the influence of the free water surface, the influence of the actual shape of the hydraulic structure, and the influence of the gate opening process; the model test method cannot satisfy all the similar laws, resulting in errors in the conclusion of the model test. match the actual results

The deficiencies of the above-mentioned methods and means have resulted in flood control departments, power plants and the government not being able to obtain accurate data on the relationship between the opening of the arc-shaped gate and the flow of the discharge structure, resulting in a discrepancy between the opening of the preset arc-shaped gate and the discharge flow, or making the downstream Flooding without protection, or preventing the downstream from getting the required amount of water at all

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