High-precision flood regulating calculation method based on optimization algorithm
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A technology of flood control calculus and optimization algorithm, which is applied in calculation, genetic model, genetic law, etc., and can solve problems such as insufficient precision
Active Publication Date: 2016-12-14
CHINA THREE GORGES UNIV
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[0004] The technical problem to be solved by the present invention is to provide a high-precision flood control calculation method based on an optimization algorithm, which can solve the problem of insufficient precision, so that the accuracy of the flood control calculation results has been significantly improved, and the calculation is convenient
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Embodiment 1
[0057] Reservoir situation: The embodiment performs flood regulation calculation for a check flood process of a certain reservoir in southwest China, and the basic calculation data are shown in Table 1 and Table 2:
[0058] Table 1 Check flood process
[0059]
[0060] Table 2 Relationship between storage capacity and water level
[0061]
[0062] A high-precision flood control calculation method based on an optimization algorithm, the method includes the following steps:
[0063] Step 1: Using the curve fitting function in the Excel table, according to the discrete data between the reservoir water level Z and the storage capacity V in Table 2, obtain the relationship function between the reservoir water level Z and the storage capacity V,
[0064] That is, V=f(Z)=V=370571Z 2 +621915Z-2×10 6 (10);
[0065] Step 2: Select the weir flow formula for calculation
[0066] Downflow
[0067] In the formula, ε is the lateral shrinkage coefficient, calculated according to ...
Embodiment 2
[0104] In order to analyze the calculation accuracy of this method conveniently, an iterative method is used to carry out a flood regulation calculation for the flood process under the same conditions. The check flood level obtained by the iterative method is 456.63m, which can be obtained by comparing with the check flood level obtained by the genetic algorithm. The check flood level obtained by the genetic algorithm is slightly higher than that obtained by the iterative method. The calibration flood level obtained by the algorithm is more secure. At the same time, the control accuracy of the Langzhong method, the calculation time of the two algorithms, the cumulative error of the reservoir outflow flow, and the cumulative error of the storage capacity were calculated, see Table 5.
[0105] Table 5 Accuracy evaluation parameter table of the two methods
[0106]
[0107] From Table 5, it can be seen that under the condition of ensuring the same accuracy, the calculation ti...
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Abstract
The invention discloses a high-precision flood regulating calculation method based on an optimization algorithm. The method comprises the following steps: 1, obtaining a relation function between the reservoir water level Z and the reservoir storage capacity V, i.e. V=f(Z); 2, deducing a corresponding relation between discharged flow q and head on weirs H0; 3, obtaining a corresponding relation between the discharged flow q and the reservoir water level Z; 4, obtaining a reservoir storage and discharge equation q=f(V); 5, deducing a corresponding relation between the reservoir storage capacity V and the discharged flow q according to the reservoir storage and discharge equation, i.e. V=g(q); 6, obtaining a mathematical model with an optimal outflow according to a water amount balance equation and the corresponding relation between the reservoir storage capacity and the discharged flow; 7, solving the mathematical optimal model in the step 6 by adopting the optimization algorithm to obtain the optimal outflow at each moment; 8, implementing high-precision flood regulating calculation. The high-precision flood regulating calculation method based on the optimization algorithm can solve the problem of low precision, so that the precision of a flood regulating calculation can be obviously improved, and the calculation is convenient.
Description
technical field [0001] The invention relates to a calculation method for flood regulation of a reservoir, in particular to a high-precision flood regulation calculation method based on an optimization algorithm. Background technique [0002] Reservoir flood control calculation is one of the important non-engineering measures in flood disaster management. The accuracy and efficiency of its calculation results have a significant impact on the effectiveness of flood control, and are of great significance to dam engineering design. There are many calculation methods for reservoir flood control calculations. The calculation methods based on the principle of water balance include trial algorithm, semi-graphic method, simplified triangle method, discharge and storage capacity relationship curve method, iterative method, etc. [0003] The trial algorithm can be used in the complex discharge situation with gate control and the situation when the time period Δt changes. The disadvanta...
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