A route selection optimization method for long-distance buried oil and gas pipeline network for preventing geomagnetic storm disasters

Abstract

The invention relates to a long-distance-delivery buried oil gas pipe network route selecting and optimizing method for resisting geomagnetic storm disasters. The long-distance-delivery buried oil gas pipe network route selecting and optimizing method for resisting the geomagnetic storm disasters comprises the steps that firstly, route selection is conducted by means of existing data and according to the current standard; secondly, geomagnetic storm disaster mutational sites of all alternative routes are found out by means of a pipe network geomagnetic storm disaster mutational site scanning searching method, and route optimization is conducted; and thirdly, a route selecting and optimizing result is output. According to the long-distance-delivery buried oil gas pipe network route selecting and optimizing method for resisting the geomagnetic storm disasters, by selecting and optimizing a a long-distance-delivery buried oil gas pipe network route, the number of geomagnetic storm disaster mutational sites can be reduced, the Dovetail peak of the pipe-to-soil potential is reduced, and accordingly the number of pipeline cathodic protection devices is reduced, pipeline corrosion protection cost is greatly reduced, the capacity to resist the geomagnetic storm disasters of a buried oil gas pipeline is improved, and the service life of the pipeline and relevant equipment is prolonged.

Description

technical field [0001] The invention relates to the technical field of line design of buried oil and gas pipeline networks, in particular to a method for selecting and optimizing lines of long-distance buried oil and gas pipeline networks for preventing geomagnetic storm disasters. Background technique [0002] Long-distance oil and gas pipelines have gas stations and oil stations at intervals, and insulating flanges are installed at the inlet and outlet of the gas stations and oil stations to electrically isolate the pipelines. For the convenience of power supply and maintenance, pipeline cathodic protection devices It is installed at the gas transmission station and the oil transmission station, and the two sections of pipelines outside the insulating flanges of the gas transmission station and the oil transmission station are connected together with metal wires. After the gas transmission station and the oil transmission station of the entire pipeline are done like this E...

AI Technical Summary

Problems solved by technology

[0004] (1) When designing routes for long-distance oil and gas pipeline projects, defense against geomagnetic storms is not considered. When local magnetic storms occur, sudden changes in pipeline network parameters and pipeline network environmental parameters will lead to sudden changes in pipeline PSP, showing a "swallow tail" "peak" shape, the traditional potentiostat can not effectively protect the PSP "swallow tail peak" phenomenon, and may even have a negative effect

[0005] (2) "Negative" cumulative effect of too long electrical continuous pipeline

[0007] (3) When the high-voltage direct current transmission single pole is running, a large current flows in the nearby pipeline, causing the potentiostat to fail or even burn out, the insulation joint overvoltage breakdown, the equipotential connector burnout and other pipeline accidents.

The GIC caused by the geomagnetic storm is similar to the DC transmission current, so too large GIC may also cause damage to equipment such as potentiostats

[0008] (4) The prior art potentiostat control has serious limitations

However, when the pipeline is too long, the global interference of the geomagnetic storm will cause the pipeline-ground potential to increase cumulatively with the increase of the pipeline length, and the stray current interference signals of the entire pipeline will be superimposed and "coupled", so that the original potentiostat loses Resistance to external stray current interference

Moreover, the existing potentiostat has a unipolar output, which cannot change the output polarity to adaptively eliminate external DC and AC stray current interference and geomagnetic stray current interference caused by space weather.

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