CN115993794A - Comprehensive automatic control method and system for oil and gas pipeline - Google Patents

Abstract

The invention discloses a comprehensive automatic control method and system for an oil and gas pipeline, wherein the method comprises the following steps: determining manually controlled single equipment in an oil gas pipeline SCADA system, accessing the single equipment into a corresponding station control system in the SCADA system, and realizing automatic control of the single equipment based on the SCADA system; establishing relevant full-time process flow logic among all monomer devices in the unit according to process requirements, and realizing automatic control of the unit based on an SCADA system; the units of the oil gas pipeline are subjected to unit linkage control by using an SCADA system; and carrying out full-picture process display through the SCADA pictures. According to the invention, a link which cannot be remotely controlled in the SCADA system of the oil and gas pipeline is connected to a corresponding station control system, so that automatic control of the single units and the units and linkage control of the units are realized, full-picture process display is performed, and finally, the full-automatic operation of the process flow is realized, the working intensity of scheduling personnel is reduced, and the experience requirements of the personnel are lowered.

Description

Comprehensive automatic control method and system for oil and gas pipeline

Technical Field

The invention relates to the technical field of intelligent control and digital operation of oil and gas pipelines, in particular to a comprehensive automatic control method and system for an oil and gas pipeline.

Background

The full-line automatic control of the oil and gas pipeline adopts a monitoring and data acquisition system taking an industrial control computer as a core, namely an SCADA system. The SCADA system consists of a central control system positioned in a dispatching control center, station control systems distributed along the line, RTUs (remote monitoring terminals) for monitoring valve chambers and a communication system. And the central control system automatically monitors and uniformly schedules and manages the whole oil and gas pipeline. Typically, the oil and gas pipeline SCADA system adopts a three-stage control mode: the first stage is central control system control, the second stage is yard control, and the third stage is in-situ operation.

Auxiliary equipment matched with part of process unit equipment of the current SCADA system of the oil and gas pipeline needs to be manually operated on site and cannot be remotely controlled. And only power equipment (pumps, compressors and the like) related to the main flow process, main control valves (electric valves, regulating valves and the like) and matched remote transmission meters are connected into the SCADA system. And auxiliary systems such as electric, fire-fighting, compressed air, axial flow fans, lubricating oil and the like are independently formed into units, and are independently operated and controlled in the respective units.

Therefore, the current SCADA system of the oil and gas pipeline lacks of the whole process flow of oil transportation or gas transportation, and has the problems of high requirement on the capability of a dispatcher, high labor intensity, large accident potential of misoperation and the like.

Disclosure of Invention

The invention aims to solve the technical problems in the prior art and provides a comprehensive automatic control method and system for an oil and gas pipeline.

In order to solve the technical problems, an embodiment of the present invention provides a method for fully and automatically controlling an oil and gas pipeline, including: determining manually controlled single equipment in an oil gas pipeline SCADA system, accessing the single equipment into a corresponding station control system in the SCADA system, establishing relevant full-time process flow logic of the single equipment, and realizing automatic control of the single equipment based on the SCADA system; establishing relevant full-time process flow logic among all monomer devices in the unit according to process requirements, and realizing automatic control of the unit based on an SCADA system; the hierarchical control method based on the combination of intra-unit control and system centralized control among units of the oil and gas pipeline utilizes an SCADA system to carry out unit linkage control; and carrying out full-picture process display through the SCADA pictures.

In order to solve the technical problems, the invention also provides a comprehensive automatic control system for the oil and gas pipeline, which comprises the following components: the method is characterized in that the processor executes the program to realize the comprehensive automatic control method of the oil and gas pipeline.

The beneficial effects of the invention are as follows: according to the invention, the link that the remote control cannot be realized in the SCADA system of the oil and gas pipeline is determined through analysis, and the monomer equipment which cannot be remotely controlled is accessed into the corresponding station control system, so that the automatic control of the monomer and the unit linkage control are realized, the full-picture process display is performed, the comprehensive automatic operation of the process flow is finally realized, the working intensity of a dispatcher is reduced, and the experience requirement of the personnel is reduced.

Additional aspects of the invention and advantages thereof will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

FIG. 1 is a flowchart of an overall automated control method for an oil and gas pipeline according to an embodiment of the present invention;

fig. 2 is a schematic diagram of network segment division according to an embodiment of the present invention;

FIG. 3 is a flowchart of a pre-start control provided in an embodiment of the present invention;

fig. 4 is a flowchart of multi-target state detection according to an embodiment of the present invention.

Detailed Description

Other advantages and effects of the present disclosure will become readily apparent to those skilled in the art from the following disclosure, which describes embodiments of the present disclosure by way of specific examples. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present disclosure. The disclosure may be embodied or practiced in other different specific embodiments, and details within the subject specification may be modified or changed from various points of view and applications without departing from the spirit of the disclosure. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict. All other embodiments, which can be made by one of ordinary skill in the art without inventive effort, based on the embodiments in this disclosure are intended to be within the scope of this disclosure.

It is noted that various aspects of the embodiments are described below within the scope of the following claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the present disclosure, one skilled in the art will appreciate that one aspect described herein may be implemented independently of any other aspect, and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number of the aspects set forth herein. In addition, such apparatus may be implemented and/or such methods practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.

The SCADA system of the long oil and gas pipeline consists of a central control system positioned in a dispatching control center, station control systems distributed along the line, RTUs (remote monitoring terminals) for monitoring valve chambers and a communication system. The main instrument monitoring unit of the oil and gas pipeline consists of temperature, pressure, flow, liquid level, density and the like. The main monitoring equipment of the oil and gas pipeline consists of various valve actuating mechanisms, a pump unit (oil pipeline), a compressor unit (gas pipeline), an auxiliary system and the like. In the prior art, a dispatching control center is used for manually and intensively regulating and controlling the whole process according to the process by a dispatcher, so as to realize the intelligent detection before the start-stop process flow of the SCADA system of the oil and gas pipeline, the intelligent start-stop process flow and the automatic safety protection.

As shown in fig. 1, the method for fully and automatically controlling an oil and gas pipeline provided by the embodiment of the invention comprises the following steps:

s1, determining manually controlled single equipment in an oil gas pipeline SCADA system, accessing the single equipment into a corresponding station control system in the SCADA system, establishing relevant full-time process flow logic of the single equipment, and realizing automatic control of the single equipment based on the SCADA system;

specifically, according to the process requirements of the oil and gas pipeline, HAZOP (hazard and operability research) analysis is firstly carried out, the links of manual operation still required by operators in the whole process flow of oil and gas transportation in each unit and each equipment in the SCADA system of the oil and gas pipeline are found, the whole process flow comprises all process flows and operation processes of cold start, hot standby, operation, process switching, shutdown and the like, the state and command signals of the equipment control system still required to be manually operated are accessed into a station PLC, and then the PLC carries out logic programming such as start-stop and the like on the relevant whole-period process flow on the monomer, and the automatic control of the monomer is realized by combining with the SCADA system picture, so that the foundation is laid for the automatic control of the whole process flow of the SCADA system of the oil and gas pipeline.

S2, establishing relevant full-time process flow logic among all the monomer devices in the unit according to the process requirements, and realizing automatic control of the unit based on the SCADA system.

On the basis of realizing automatic control of the monomers, each process unit of the oil and gas pipeline, such as an inlet area, an outlet area, a pressure regulating area, a pump area, a compressor area and the like, realize cooperative work among the monomer devices in the units through an SCADA system according to process requirements, automatically operate according to a set flow by inputting instructions through a dispatcher, and output operation results to an external system to realize feedback control, thereby realizing automatic control of the process units.

S3, performing unit linkage control by using a SCADA system by using a hierarchical control method based on combination of intra-unit control and system centralized control among units of the oil and gas pipeline.

On the basis of automatic control of units, all units of the oil and gas pipeline are subjected to unit linkage control through an SCADA system according to flow logic.

S4, carrying out full-picture process display through the SCADA picture.

According to the embodiment of the invention, the link that the remote control cannot be performed in the SCADA system of the oil and gas pipeline is determined through analysis, and the monomer equipment which cannot be remotely controlled is connected into the corresponding station control system, so that the automatic control of the monomer and the unit linkage control are realized, the full-picture process display is performed, the comprehensive automatic operation of the process flow is finally realized, the working intensity of a dispatcher is reduced, and the experience requirement of the personnel is reduced.

As shown in FIG. 2, embodiments of the present invention provide a three stage control system including a monomer apparatus, unit and system. The system comprises a station control system and a central control system. The upper level collects the state quantity of the lower level and sends the control quantity to the lower level according to the main control logic; only the state quantity and the control quantity related to the operation of the unit are sealed in the unit controller, so that the control in the unit is realized; and outputting the state quantity and the control quantity related to the system operation to the system for centralized detection and control.

It should be noted that the state quantity in the system is a dependent variable obtained by measurement, and may itself be set as a control target, but not as a result of control, cannot be adjusted alone, for example, the pressure in the piping system is performed by the cooperation of the pump operation and the valve, and cannot be adjusted by directly adjusting the line pressure. The control quantity is the quantity to be regulated, is an independent quantity, and can be measured and independently changed at the same time. The state of the system changes after the control amount changes, for example, the change of the rotation speed of the pump can cause the change of the pressure and the flow of the system, the rotation speed is an independent variable and the control amount, and the pressure and the flow of the outlet are state amounts.

The state quantity (controlled variable CV) and the control quantity (operating variable MV) among the units adopt a hierarchical control method combining intra-unit control and centralized control, and the state quantity and the control quantity related to the operation of the unit are only enclosed inside the unit controller and cannot be externally transmitted. The state quantity (controlled variable) and the control quantity (operation variable) related to the system operation are output to the system for centralized detection and control, and the on-site control and remote control can be performed.

According to the embodiment of the invention, the three-level control system of the oil and gas pipeline equipment, units and systems is integrated, so that the independent operation of the equipment, the state upper-level monitoring and the multi-target linkage optimization are realized.

In the system multi-unit, the upper system collects the state quantity (controlled variable CV) of the lower system, and the operation parameters of the lower system are controlled according to the main control logic. The unidirectional isolation of the upper control to the lower control is realized, the output of the lower control is a state quantity, and the upper system cannot be controlled. In the prior art, units are usually independent, the main control system does not collect the state quantity of the auxiliary system, the auxiliary system is not controlled, and the auxiliary system is manually operated. The embodiment of the invention enables the auxiliary system to be connected into the corresponding station control system, and realizes the linkage control of the auxiliary system and the main flow system.

Part of process unit systems of the current SCADA system of the oil and gas pipeline need to be preheated and prepared in advance, and the other part is manually operated; partial process flows such as pressurization lack of automatic conduction and the like, and automatic control of all process flows cannot be realized. On the basis of automatic control of units, when equipment such as an air compressor and the like needing to be started in advance, pre-punching and the like exist, and when a command needing to be controlled is received, if the time is not yet determined, the pre-starting command is used for realizing the advanced control, and when an auxiliary system has a condition, the main flow system is automatically switched to a standby state, so that the linkage control of equipment units in the system (the auxiliary system and the main flow system) is realized.

Specifically, judging whether a starting condition is met, and performing an automatic conduction flow and automatic starting auxiliary system processing on a system state which is not met; if the equipment which does not meet the starting and conveying conditions is automatically started or shut down, the operation of automatically setting a preset value and the operation of automatically selecting the proper technological process and the like are performed, so that the system state enters the pre-starting state. And when the auxiliary system is started, the main flow system automatically switches to a standby state; and (3) performing secondary judgment on the starting condition, and performing full-flow starting when the system state, the conduction flow and the auxiliary system meet preset requirements.

The embodiment of the invention also provides the following safety protection mechanism.

In the control system shown in fig. 2, a unit network is built in a unit, a system control network is built in a system, an external communication network is built between the system and an external system, the unit network, the system control network and the external communication network divide different network segments, and different protocol connection modes are adopted for communication. The embodiment of the invention adopts three networks to realize safe control through physical isolation, and realizes high-speed control, redundant backup and relative closure in the system and open and low-speed compatibility of external communication. For example, the compressor control system collects external traffic to each station and central control system in the system through an external communication network by a communication protocol different from the internal of the system, collects state quantity of units to the system control network through a unit network, controls controlled variables through the system control network, and the external communication network does not directly send control commands to the unit network.

The security mechanism is that the control logic of the cell network and the system control network cannot be refreshed and changed remotely through the data of the external communication network, and remote program updates are not accepted.

The system level optimizes the units, distributes the load among the power equipment such as the compressors, pumps and the like by taking the lowest energy consumption as a principle, and can realize autonomous safety protection when the process flow runs automatically.

The power equipment such as the compressor, the pump and the like is automatically preselected in a plurality of machines before starting operation through historical operation time, maintenance period, state parameters and the like, so that the balanced use of the power equipment is realized, and the operation reliability of the pipeline is improved.

According to the maintenance period set by the system, combining the current running state, and popup the equipment maintenance prompt 2 operation periods in advance or 7 days in advance.

The embodiment of the invention can realize full-picture process display based on the SCADA picture through the following aspects.

1) The state early warning is carried out by establishing a control quantity list mode through the SCADA picture, an associated control quantity list is established for each state quantity according to multiple dimensions (such as geographic position, hydraulic system, parameter category, unit and the like), and when the state quantity is abnormal, the associated control quantity is analyzed according to the current flow, such as the detection, identification and treatment of the problems of safety risks and the like are realized through geographic factors, environmental factors, hydraulic factors, equipment types and the like.

In the existing SCADA system for the oil and gas pipeline, a dispatcher can only manually judge the thresholds of variables such as pressure, flow, rotating speed, valve switch, start-stop of power equipment and the like in sequence, and the process and the stage of which operation the process flow of the oil and gas pipeline is in need of being manually judged by combining experience. Because of the insufficient number of sensors, the spare system is not sound, and the like, the SCADA system cannot timely and accurately acquire information and remotely treat the technological process failure. In the embodiment of the invention, the state detection and alarm management are based on multivariate cooperation, and a vector diagram can be adopted to determine a reasonable threshold value among multiple controlled variables of the SCADA system. The start and stop processes of each flow can be initiated only if each controlled variable is within the state interval required by each flow. In different situations, a plurality of variables jointly determine whether the system is in an alarm state, and the embodiment of the invention graphically displays the process.

2) Displaying the process in the switching process by adopting a graphical flow according to the data tag and the system tag, and jumping out of a fault point when a fault occurs; and quickly positioning fault points in the P & ID instrument process control diagram.

The system tag adopts a mode of system+position+unit+equipment+parameter+serial number to name the tag; and the data labels are named by adopting a mode of position, equipment, parameter and number.

The precondition for realizing the automatic identification, analysis and positioning functions of the abnormal working conditions is to integrate the following system data. The system data integration method comprises the following specific processes:

and through process operation logic judgment, advanced protection is realized to avoid crosstalk between upstream and downstream and sequential flows. The state detection and judgment are carried out through the logic linkage, so that the mutual exclusion operation is realized and the misoperation is avoided.

The system label refers to the naming of each unit system of the SCADA system, and the system position state of the process flow is described according to the process flow. The data tag refers to the state quantity and control quantity of each system, which participates in the data state of the process flow.

The system performs label naming in a mode of system+position+unit+device+parameter+serial number, and unifies system labels. And according to the parameter type unified data format and the control flow and state judgment requirements, determining the data flow direction, realizing the overall unification of data among the whole flow, the whole time and the whole domain multiprocess, and realizing the arrangement integration and optimization of the system level.

The data label is written in a four-stage mode of position, equipment, parameter and number, so that the whole process is not repeated.

The data flow is transmitted and distributed according to the process flow, so that the state quantity and the control quantity required by each flow are timely and accurately transmitted.

Based on system data integration, the embodiment of the invention adopts a graphical flow to display the progress in the switching process according to the data label and the system label, and a fault point is jumped out when a fault occurs; the fault point can be quickly positioned in the P & ID instrument process control diagram. Compared with the prior art that the abnormal working condition is identified, analyzed and positioned by means of the experience of the dispatcher, the method has the advantages of being efficient, accurate and the like.

3) And the data parameter sub-unit is displayed with the flow of the process to realize the association clustering. Specifically, displaying pressure in an oil-gas pipe network system according to the sequence of a hydraulic system, and determining the pressure linkage relation of each position according to natural friction resistance; comprehensively displaying operation parameters according to the equipment units or subsystems; and displaying the association relation according to the same position, and realizing process tracing in the emergency state.

4) And displaying the multivariate information through a matrix chart.

The picture adopts a matrix diagram for multivariate information display, which operation variables (MVs) are connected with which state quantity Controlled Variables (CVs), which MVs can be used for constraint control, and which CVs can be optimized.

Variable control and optimization are performed through a matrix diagram, hysteresis control is performed according to parameter transfer delay between pipelines to reduce fluctuation of a process variable, and an operation variable is changed in a gradient increasing and decreasing mode according to hysteresis time so that a controlled variable of a process flow is more quickly close to a target set value. The control can be performed by automatic control logic such as PID, expert control, adaptive control and the like.

And judging abnormal working conditions through the matrix diagram, and displaying abnormal variables through the matrix diagram. The graph shows abnormal state variables (CV) in red, and operating variables (MV) associated therewith in light red. Green shows the variation of the normal interval. The current running state and the change are quickly positioned through the color, and the dispatcher is assisted in decision making.

The different working conditions can be listed as different controlled variables and controlled variables by an exhaustion method, and all the working conditions and the corresponding relations of the variables form a matrix table, so that a matrix diagram is formed.

The existing SCADA system for the oil and gas pipeline lacks a full-state display judging method for variables such as oil transportation or gas transportation full-process flow, pressure, flow, rotating speed, valve switch, start-stop of power equipment and the like, and has the problems of high requirements on capacity of a dispatcher, high labor intensity, large accident potential caused by misoperation and the like. According to the embodiment of the invention, the monomer equipment and the auxiliary system which cannot be remotely controlled by the current oil gas pipeline SCADA system are connected to the corresponding station control system, so that the automatic control of the monomer and the unit linkage control are realized, the full-picture process display is carried out, the full-automatic operation of the process flow is finally realized, the working intensity of the dispatcher is reduced, and the experience requirement of the personnel is reduced.

According to the embodiment of the invention, from the automatic execution of the process flow of the single equipment, the target detection and self-organization of the units, the state detection and alarm management among multiple units, the system data integration and the safety protection, the picture and the process integration, and finally the intelligent operation level improvement, the safe, stable and efficient operation of the long oil and gas pipeline are realized through the full-time full-domain automatic operation of the whole flow.

The present invention will be described in detail with reference to a specific example.

The invention is implemented in a certain air compression station by comprehensive automatic operation, and firstly, various states of startup and shutdown are determined by adopting HAZOP analysis. And in the stop state, the station yard cannot be automatically pressurized. The pressurizing air source is added through the process transformation.

Auxiliary systems such as station lubricating oil, dry gas seal, compressed air and the like are connected into the station control system directly through electric connection, so that independent sealing of all subsystems and centralized and unified control of the station control system are realized. The control quantity utilizes the internal backboard of the PLC to realize high-speed communication. Remote central control and data transmission employ a network-mediated station control system for data bi-directional communication.

In the control process, a system control time sequence is established according to fig. 3, and whether a starting condition is met or not (the first state detection information mainly provides the whole state of the pipeline) is judged, and the automatic conduction flow, the automatic starting auxiliary system and the like are carried out on the unsatisfied state. And then starting auxiliary systems such as an air compressor, a fan, lubricating oil and the like. And then conducting the flow to prepare for starting the compressor. And then performing secondary judgment (the second state detection information mainly provides the state of the primary power equipment started in advance in the current transmission, and the secondary judgment is the judgment of the starting condition) and determining whether the state, the flow and the auxiliary system meet the requirements. And when the conditions all meet the requirements, selecting the compressors to be started according to the set rules, starting, adjusting the working conditions according to the set working conditions after starting, and starting normal operation until reaching the preset state. And when the shutdown condition is met and a shutdown command is received, performing shutdown processing, and switching to a standby state.

The process requiring a long time for preheating the gas replacement and the like can be pre-started to shorten the starting time.

The system detects the state according to fig. 4, ensures that the environment, the ESD (emergency stop emergency shutdown) alarm, the valve, the auxiliary system and the equipment are all in reasonable states, and avoids accidents caused by abnormal starting under the condition that the conditions are not satisfied. If a certain flow is judged to be not conducted, conducting the corresponding flow, if a certain auxiliary system is not started, starting the corresponding auxiliary system, if the auxiliary system needs to be started in advance, starting the corresponding auxiliary system in advance, if equipment has faults, conducting fault processing, and when the problems are solved, namely, when all the states are in preset states, determining that the starting conditions are met.

And (3) presetting waiting time which is 1.5 times of the time required by the normal starting time sequence, judging that the starting fails when the process is not completed within the preset time, and exiting the starting process.

The embodiment of the invention also provides an oil gas pipeline comprehensive automatic control system, in particular to a method for realizing the oil gas pipeline comprehensive automatic control method provided by the embodiment when the processor executes the program, wherein the manual control monomer equipment and auxiliary systems in the oil gas pipeline SCADA system are connected to corresponding station control systems in the SCADA system, and the station air system and the central control system of the SCADA system comprise a memory, a processor and a computer program which is stored on the memory and can run on the processor.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the apparatus and units described above may refer to corresponding procedures in the foregoing method embodiments, which are not described herein again.

In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of elements is merely a logical functional division, and there may be additional divisions of actual implementation, e.g., multiple elements or components may be combined or integrated into another system, or some features may be omitted, or not performed.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the embodiment of the present invention.

In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention is essentially or a part contributing to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods of the embodiments of the present invention. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, randomAccessMemory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims (10)

1. The comprehensive automatic control method for the oil and gas pipeline is characterized by comprising the following steps of:

determining manually controlled single equipment in an oil gas pipeline SCADA system, accessing the single equipment into a corresponding station control system in the SCADA system, establishing relevant full-time process flow logic of the single equipment, and realizing automatic control of the single equipment based on the SCADA system;

establishing relevant full-time process flow logic among all monomer devices in the unit according to process requirements, and realizing automatic control of the unit based on an SCADA system;

the hierarchical control method based on the combination of intra-unit control and system centralized control among units of the oil and gas pipeline utilizes an SCADA system to carry out unit linkage control;

and carrying out full-picture process display through the SCADA pictures.

2. The method of claim 1, wherein the hierarchical control method based on the combination of intra-unit control and centralized control of the system among the units of the oil and gas pipeline performs unit linkage control by using a SCADA system, and the method comprises the following steps:

the three-level control system integrates the oil and gas pipeline single-body equipment, units and systems, and the upper level collects the state quantity of the lower level and sends the control quantity to the lower level according to the main control logic;

only the state quantity and the control quantity related to the operation of the unit are sealed in the unit controller, so that the control in the unit is realized;

and outputting the state quantity and the control quantity related to the system operation to the system for centralized detection and control.

3. The method of claim 2, wherein the system comprises a station control system and a central control system; and the unit network, the system control network and the external communication network are divided into different network segments and communicated in different protocol connection modes.

4. The method of claim 1, further comprising accessing an auxiliary system to a corresponding station control system to realize linkage control of the auxiliary system and the main flow system, and specifically comprising:

judging whether the starting condition is met, and carrying out automatic conduction flow and automatic starting auxiliary system processing on the system state which is not met; when the auxiliary system is started, the main flow system automatically switches to a standby state;

and (3) performing secondary judgment on the starting condition, and performing full-flow starting when the system state, the conduction flow and the auxiliary system meet preset requirements.

5. A method according to any one of claims 1 to 4, wherein said full-picture process presentation via SCADA pictures comprises: and (3) carrying out state early warning by establishing a control quantity list mode through the SCADA picture, establishing an associated control quantity list for each state quantity according to multiple dimensions, and analyzing the associated control quantity according to the current flow when the state quantity is abnormal.

6. The method of claim 5, wherein the full-picture process presentation via SCADA pictures further comprises: displaying the process in the switching process by adopting a graphical flow according to the data tag and the system tag, and jumping out of a fault point when a fault occurs;

the system tag adopts a mode of system+position+unit+equipment+parameter+serial number to name the tag; and the data labels are named by adopting a mode of position, equipment, parameter and number.

7. The method of claim 5, wherein the full-picture process presentation via SCADA pictures further comprises: and the data parameter sub-unit is displayed with the flow of the process to realize the association clustering.

8. The method of claim 7, wherein the data parameter sub-unit and process flow display implement an associative cluster comprising:

displaying pressure in an oil-gas pipe network system according to the sequence of a hydraulic system, and determining the pressure linkage relation of each position according to natural friction resistance; comprehensively displaying operation parameters according to the equipment units or subsystems; and displaying the association relation according to the same position, and realizing process tracing in the emergency state.

9. The method of claim 5, wherein the full-picture process presentation via SCADA pictures further comprises: and (3) displaying the multivariate information, controlling and optimizing the variables and judging and displaying the abnormal working conditions by adopting a matrix chart.

10. An oil gas pipeline comprehensive automatic control system, characterized in that a single device and an auxiliary system which are manually controlled in an oil gas pipeline SCADA system are connected to a corresponding station control system in the SCADA system, and a station air system and a central control system of the SCADA system comprise a memory, a processor and a computer program which is stored in the memory and can run on the processor, and the oil gas pipeline comprehensive automatic control system is characterized in that the processor realizes the oil gas pipeline comprehensive automatic control method according to any one of claims 1 to 9 when executing the program.

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