Automatic distribution method and system for natural gas

Abstract

The invention discloses an automatic distribution method and system for natural gas. The system comprises a station controller, a plurality of station control system PLCs and a plurality of automaticdistribution mainframes so as to correspond to different gas supply areas, and is characterized in that the station controller sends operation parameters input from an operation interface to the station control system PLCs; the PLCs send the operation parameters to the automatic distribution mainframes; target values are returned to the station control system PLCs after relevant calculation is carried out through the automatic distribution mainframes; and the PLCs control corresponding valves to carry out gas delivery control.

Description

technical field [0001] The invention belongs to the field of automatic control and information technology, in particular to the automatic distribution technology of natural gas pipelines. Background technique [0002] At present, domestic natural gas pipeline user management has gone through three historical stages: on-site control, station control and central control. The / flow control mode takes up a lot of time and energy of the staff, and it is difficult to adapt to the current management requirements. It is necessary to develop a new technology to realize the automation of user management, so as to achieve the refined management of each distribution user. [0003] At present, the distribution methods adopted by PetroChina distribution stations are all manual distribution methods, that is, the daily designated amount is issued by the control center, and the operator manually adjusts it according to the downstream pressure and flow changes to meet the gas consumption of ...

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Problems solved by technology

[0005] 2) At the end of the daily distribution, in order to ensure that the gas transmission volume of the day is consistent with the daily designated volume, the staff needs to make frequent adjustments manually, which has the disadvantages of heavy workload and frequent adjustments;

[0006] Pressure / flow control has low control accuracy, resulting in large pressure fluctuations or large errors between the gas delivery volume and the daily specified volume, etc.

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