Province-level natural gas gas transportation station field intelligent adjusting controlling method

Abstract

The invention relates to the field of natural gas delivery, in particular to a province-level natural gas gas transportation station field intelligent adjusting controlling method, and aims at solvingthe problem that non-disturbance switching cannot be conducted when a gas supplying branch is faulted due to linkage lacking and mutual independence of an upstream branch of an existing natural gas gas delivery station field. The method comprises the steps that incremental type PI is taken as a main controller in a controller design, a PI parameter change is computed through a fuzzy algorithm, following speed of an adjusting valve and a valve characteristic curve are introduced, computation is conducted for the secondary revising of the PI parameter change to obtain the final parameter revising value, and the adjusting process is optimized; the serial control of two branches is achieved through logic link, branch switching is triggered according to valve position, flow rate and pressure variation when any branch is cut out, and a faulted branch is cut out of the link control to be taken over and regulated by the other branch. The method has the advantages that homeostatic control is conducted on an upstream regulator in a wider range, the overshoot is low, and the non-disturbance switching of a gas supplying branch can be achieved.

Description

Technical field [0001] The invention relates to the technical field of natural gas transportation, in particular to an intelligent adjustment control method for provincial natural gas transmission stations. Background technique [0002] In the design of the gas transmission station of the provincial natural gas pipeline network, the downstream pressure and flow need to be regulated and controlled. Generally, the electric regulating valve controlled by the PLC of the two-route station is used, and the downstream is generally the gas station of the local city gas. The pressure needs to be adjusted twice, so self-operated control valves are often used, and the flow rate varies greatly in different periods. When planning the station yard, comprehensively consider the construction costs of land, pipelines, etc., and often set the upstream and downstream stations adjacent to each other, causing the upstream and downstream two-stage regulators to be set up close, and they are independen...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved and the technical task proposed by the present invention are to overcome the problem that the upstream regulating branches in the existing provincial natural gas transmission stations lack linkage and are independent from each other, and cannot perform undisturbed switching when the gas supply branch fails. The invention proposes a provincial-level natural gas transmission station intelligent regulation control method, the control method is suitable for the upstream regulator, so that the regulator can achieve steady-state control in a large range, and the overshoot is extremely small, and can be simultaneously Realize the do-not-disturb switching of the gas supply branch

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