Method for optimizing gravity flow water conveying pipeline valve closing scheme screening based on genetic algorithm

Abstract

The invention relates to a method for optimizing gravity flow water conveying pipeline valve closing scheme screening based on a genetic algorithm. The method comprises the steps that a hydraulic transient calculation model of a long-distance gravity flow water conveying pipeline is established; performing optimization design on a valve closing curve and an air valve arrangement scheme based on a genetic algorithm; repeatedly carrying out optimization calculation on the valve closing schemes with different total valve closing time, carrying out statistics on optimization results, and determining the optimal valve closing time; repeatedly performing optimization calculation on the valve closing schemes of different stages based on the optimal valve closing time, counting optimization results, and determining the optimal valve closing curve stage number; the valve closing curve is simplified based on the characteristics of the valve closing curve, and the optimal valve closing scheme of the gravity flow water conveying pipeline is obtained. The screening method for the gravity flow water conveying pipeline valve closing schemes has the advantages of being few in genetic algorithm objective function dimensionality, small in search space, low in optimization calculation complexity and high in calculation success rate, and has wide application prospects in the aspect of determining the long-distance gravity flow water conveying pipeline water hammer protection schemes.

Description

technical field [0001] The application belongs to the technical field of urban water supply system safety and energy saving, and specifically relates to a method for optimizing the selection of water supply pipeline valve closing schemes. Background technique [0002] Long-distance gravity flow water delivery projects are an effective means to solve the problem of uneven spatial distribution of freshwater resources in some areas of my country. However, unreasonable end valve closure schemes are one of the important reasons for water hammer and endanger the safety of water supply systems. Aiming at the optimization problem of valve closing curve in long-distance water transmission projects, there are currently two design methods generally adopted: empirical method and algorithm optimization method. The typical methods of empirical method, such as enumeration method and orthogonal experiment method, have limited calculation times and poor representativeness, and it is difficul...

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Problems solved by technology

Typical methods of empirical methods such as enumeration method and orthogonal experiment method have limited calculation times and poor representativeness, and it is difficult to obtain the global optimal solution

The algorithm optimization method based on the intelligent optimization algorithm can easily obtain the global optimal solution, but there is no report on the research on selecting the optimal number of stages for the multi-stage valve closing scheme using this method

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