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Control system and method for natural gas pipeline divided transportation electric regulating valve

A technology for natural gas pipelines and electric control valves, which are applied in pipeline systems, gas/liquid distribution and storage, mechanical equipment, etc., can solve problems such as inability to automatically control flow, avoid the reduction of distribution efficiency, and reduce the risk of system function failure. The effect of avoiding operational risks

Active Publication Date: 2017-05-31
PETROCHINA CO LTD
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  • Description
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Problems solved by technology

[0005] The purpose of the present invention is to provide a natural gas pipeline distribution electric regulating valve control system and its method, aiming to solve the problem that the existing natural gas pipeline control system can only control the pressure, cannot automatically control the flow, or needs to switch the control mode manually Achieving control over pressure and flow

Method used

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  • Control system and method for natural gas pipeline divided transportation electric regulating valve
  • Control system and method for natural gas pipeline divided transportation electric regulating valve
  • Control system and method for natural gas pipeline divided transportation electric regulating valve

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specific Embodiment 1

[0046] Such as figure 1 As shown, the embodiment of the present invention provides a natural gas pipeline distribution and transmission electric regulating valve control system, including a sensor redundancy design module 102, a data acquisition and filtering fault-tolerant module 103, a pressure and flow control module 104, an output filtering module 105, an electric Regulating valve 106, remote control system 107, wherein:

[0047] The sensor redundancy design module 102 is respectively connected with the external natural gas pipeline hydraulic system 101 and the data acquisition and filtering fault-tolerant module 103. The sensor redundancy design module 102 includes a plurality of pressure transmitters for converting the natural gas in the natural gas pipeline hydraulic system The flow data and pressure data are sent to the data acquisition and filtering fault-tolerant module 103 . Because the pressure transmitter is exposed to the open environment of the station all the ...

specific Embodiment 2

[0067] Such as image 3 As shown, the embodiment of the present invention provides a method for controlling an electric control valve for distribution and transmission of natural gas pipelines using any one of the above control systems, including:

[0068] Step S101, sensing the flow data and pressure data of natural gas in the natural gas pipeline hydraulic system;

[0069] Step S102, collecting flow data and pressure data, filtering the flow data and pressure data for fault tolerance, and obtaining pressure measurement values ​​and flow measurement values;

[0070] Step S103, receiving the flow setting value, high pressure protection setting value, and low pressure protection setting value input by the user;

[0071] Step S104, according to the pressure measurement value, the flow measurement value, the flow setting value, the high pressure protection setting value, and the low pressure protection setting value, the control signal of the electric regulating valve is obtaine...

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Abstract

The invention provides a control system and method for a natural gas pipeline divided transportation electric regulating valve. It is only needed that a pressure high-limit value, a pressure low-limit value and a flow set value are manually preset, the system will perform automatic execution according to the control logistics in divided transportation operation. When the pipeline divided transportation pressure is ultra high or too low or the divided transportation flow is ultra high, the control system can automatically switch control modes without manual real-time monitoring and adjustment of pipeline control parameters, natural gas divided transportation operation is preferentially performed according to the preset flow value in a safety work condition on the premise that the pipeline pressure is not ultra high or too low, and it is guaranteed that the pipeline natural gas divided transportation process is safe and stable; and meanwhile, the flow divided transportation efficiency is improved, and manpower resources are saved. On the other hand, a sensor redundancy design module is adopted for the control system and method, the risk that the system function loses efficacy because of an outside single sensor fault is reduced.

Description

technical field [0001] The invention relates to the technical field of distribution and transmission of natural gas pipelines, in particular to an electric regulating valve control system for distribution and transmission of natural gas pipelines and a method thereof. Background technique [0002] With the popularization of pipeline natural gas in my country and the improvement of automation control level, the storage and transportation control mode of pipeline natural gas has gradually changed from the initial local manual control to remote automatic control. The basic structure of the existing electric regulating valve control system for distribution and transmission of natural gas pipelines consists of sensors, industrial control host computers, programmable logic controllers (Programmable Logic Controller, PLC), electric regulating valves and other equipment. [0003] According to the different control requirements, the sensor only selects the pressure transmitter, which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F17D3/01F17D1/02
CPCF17D1/02F17D3/01
Inventor 王树祺戚麟孙艳国
Owner PETROCHINA CO LTD
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