Method for measuring and locating leakage of gas pipelines

Abstract

The invention discloses a method for measuring and locating leakage of a gas pipeline network based on a geographic information system (GIS) and supervisory control and data acquisition technology (SCADA). The specific method comprises the following steps of establishing a gas pipeline network GIS system; reading and storing a pipe network graph, pipeline network attribute data and the like; collecting parameters of pressure, temperature and flow for each section of gas pipeline in real time by the SCADA system; comparing the collected parameters and the stored data and calculating; calculating the measuring values of the head end and the tail end of the pipeline and calculating the difference among parameter values; representing the abnormal pipeline information; searching extreme points and determining the pressure catastrophe points; calculating the position of the leakage point according to the parameters of gas consumption, temperature and pressure by using a leakage locating formula. By adopting SCADA, GIS and simulation calculations, the invention can realize self monitoring and locating of the gas pipelines with the advantages of quick measuring speed, high measuring precision, low missing report rate and false report rate and the like.

Description

technical field [0001] The invention belongs to gas detection and monitoring technology, in particular to a method for automatic detection and positioning of gas pipe network leakage based on geographical information and data acquisition and monitoring system technology. Background technique [0002] With the expansion of city gas application scope, the laying of natural gas pipeline system tends to be more intensive. As we all know, natural gas is a flammable and explosive gas, and the safety requirements for its storage and transportation are very high. Especially for gas transportation pipelines with a length of more than several hundred kilometers, most of them have to pass through remote and complex areas. In addition to sparsely populated in these areas, most of the gas pipelines are hidden projects, with many points, long lines, and wide areas. After the leakage accident, it is difficult to detect or determine the location of the leakage in time, which may lead to a ...

AI Technical Summary

Problems solved by technology

At present, domestic urban natural gas pipelines still adopt the relatively backward manual inspection and leak detection method, that is, inspectors regularly carry relevant leak detection instruments to patrol along the pipeline, so that it may not be discovered until a long time after the leak occurs. And for some situations with complex terrain, even no leaks can be detected

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