Non-metal pipeline leakage positioning method based on inverse transient analysis method

Abstract

The invention discloses a non-metal pipeline leakage positioning method based on an inverse transient analysis method. The non-metal pipeline leakage positioning method comprises the steps of measuring the data of the flow and the pressure of a pipeline in the leakage state and the non-leakage state respectively, and summarizing the unified characteristics of the pipeline in the leakage state andthe non-leakage state; establishing a non-metal pipeline leakage state inverse transient model; carrying out section classification on the pipeline by utilizing the unified characteristics of the pipeline in the leakage state and the non-leakage state, and determining the leakage pipeline section and the non-leakage pipeline section; carrying out primary leakage positioning on the leakage pipelinesection by using a pressure gradient method; providing an ant colony algorithm to determine a target parameter friction coefficient with the best convergence, and substituting the target parameter friction coefficient into a characteristic equation to obtain a calculation pressure head of a pressure measurement point; substituting the calculated pressure measurement head and the pressure measurement head measured by the experiment into the inverse transient model to find a minimum target function value; and substituting all the parameters of the corresponding positions into a pressure gradient formula to obtain the calculated position of the leakage point. The non-metal pipeline leakage positioning method can be easily achieved only by measuring the pipeline pressure and the flow parameters, so that the calculation speed is increased, and the calculation precision of the target function is ensured.

Description

technical field [0001] The invention relates to the technical field of non-metallic pipeline leakage detection, in particular to a non-metallic pipeline leakage location method based on an inverse transient analysis method. Background technique [0002] With the development of modern industrialization and the improvement of people's living standards, the status of pipelines in people's production and life is also getting higher and higher. Non-metallic pipes have the advantages of high strength, low density, strong corrosion resistance, excellent insulation, and long service life, so the use of non-metallic pipes has become a research hotspot. However, as urban buried pipeline networks become more and more dense, especially pipeline construction projects for transporting natural gas and refined oil, etc., along with the increase in the number of these pipelines and the increase in operating time, the problems of pipeline aging and leakage have become increasingly prominent. ...

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Problems solved by technology

However, using this patented method to implement the calculation is slow, and the calculation accuracy is not high enough

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