Pipe network leak detecting method in combination with resistance identification

Abstract

The invention discloses a pipe network leak detecting method in combination with resistance identification, relates to pipe network leak detecting methods and aims to solve the problems that passive leakage control methods mainly need a large number of instruments, equipment and manpower and are hardly combined with automatic monitored control systems, and large deviation of optimization results due to a small number of samples and long consuming time exist in artificial neural network methods. The pipe network leak detecting method in combination with resistance identification includes that firstly, pressure observed values of flow nodes of part of pipe sections are used as known conditions; an equation set containing pipe section resistance information is established; resistance results are expressed through generalized inverse solution of the equation set. Then, a pipeline where leakage possibly occurs is divided into a plurality of different areas; in each area, observed values of operation parameters of an edge pipe network are used as known conditions, virtual nodes are introduced to represent leakage points, and specific positions and leakage flow of the virtual nodes are determined by the aid of genetic algorithm optimization; accordingly, leakage is positioned and quantified. Then sequential manual troubleshooting and re-checking is performed. The pipe network leak detecting method in combination with resistance identification is applicable to the field of pipe network leak detection.

Description

technical field

[0001] The invention relates to a pipeline network leakage detection method. Background technique

[0002] Pipeline leak detection methods can be divided into two broad categories, namely passive leak detection methods and active leak detection methods. The passive leak detection method is relatively straightforward, and most of them need to use instruments and equipment with certain detection functions for leak detection; while the active leak detection method mainly relies on the daily monitoring data of the pipeline network, and uses effective analysis methods for leak detection.

[0003] Passive leak detection methods mainly include manual inspection method, isolation method, listening method and temperature measurement method. The manual inspection method needs to organize a special team to inspect the pipeline, which depends on the sensitivity, experience and sense of responsibility of the personnel, and only some large leaks can be found. The isolati...

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