Oil and gas pipeline station intelligent instrument transmission system based on AUTBUS

Abstract

The invention belongs to the field of network communication, and particularly relates to an oil and gas pipeline station intelligent instrument transmission system based on an AUTBUS. The problem that a large amount of data collected by an instrument cannot be uploaded to a control system is solved. The system comprises an upper computer, a PLC (Programmable Logic Controller), AUTBUS bus transmission equipment and AUTBUS terminal equipment, the upper computer is connected with the PLC, and the PLC is used for controlling signal transmission of the AUTBUS bus transmission equipment; the AUTBUS bus transmission equipment comprises an AUTBUS bus network, an AUTBUS master station, an AUTBUS slave station and an AUTBUS agent; the AUTBUS bus network is a double-ring network; the AUTBUS terminal equipment is connected with the AUTBUS slave station, and the AUTBUS terminal equipment comprises a gas pipeline station yard intelligent instrument. The network structure is reasonable, redundant backup is achieved, and the reliability of signal transmission is improved.

Description

Technical Field

[0001] The invention belongs to the field of network communication, and in particular relates to an intelligent instrument transmission system for oil and gas pipeline stations based on an AUTBUS bus. Background Art

[0002] At present, the intelligent instruments in the oil and gas pipeline station and the IO modules in the PLC / DCS cabinet of the automatic control system are connected by point-to-point hard wiring. The hard wiring sequence is intelligent instrument-on-site explosion-proof junction box-automatic control system cabinet. This traditional connection method requires a large number of control cables, explosion-proof junction boxes, cable trays, and installation bulk materials. The control system needs to access the signals uploaded by the intelligent instrument, so it also needs to be equipped with a large number of IO modules, surge protectors, terminal blocks, wiring cabinets and other accessories. And with the increase in the number of cabinets, the area occupied by the cabinet room is also relatively large, and the UPS power supply load required by the control system is also high. During construction, on-site construction personnel will spend a lot of energy on on-site instrument cable laying, cable wiring, and control system configuration and debugging, which is time-consuming and labor-intensive and prone to errors, resulting in a large number of reworks and a long construction period. In view of the current status of traditional control systems, the present invention provides an intelligent instrument transmission system for oil and gas pipeline stations based on AUTBUS bus. The network structure of the present invention is reasonable and has redundant backup. The number of AUTBUS slave stations and terminal devices can be set according to engineering requirements. The intelligent instruments of oil and gas pipeline stations are connected by adopting a double ring network, which improves the traditional control system wiring method.

[0003] At present, oil and gas pipeline stations basically do not use fieldbus systems for connection, and still use the traditional point-to-point wiring method. This connection method is based on 4-20mA analog and 24VDC switch signals. The hard collection point is connected to the control system PLC cabinet IO module in a point-to-point manner through a multi-core cable. The disadvantages of the traditional system architecture are: 1. The amount of signals uploaded by the smart instrument is very small, and the large amount of data collected by the instrument itself cannot be uploaded to the control system; 2. The data capacity of the control system depends on the number of IO modules. The number of IO modules connected to each control system has an upper limit. When the upper limit is exceeded, the control system needs to be increased. When facing big data, the scale of the entire control system will be very large; 3. The signal transmission method is still smart instrument-field explosion-proof junction box-automatic control system cabinet. This traditional connection method requires a large number of control cables, explosion-proof junction boxes, cable trays, and installation bulk materials. The above problems are technical problems that need to be solved urgently.

[0004] How to apply bus technology for data transmission is a difficult problem for various domestic industries. It plays a supporting role in the technological development of future smart pipelines, smart LNG receiving stations, and smart oil depots. Currently, these industries are blank and emerging businesses, and it plays a leading role in the transmission of big data of future station equipment and the realization of real-time and automation.

[0005] Based on this, the present invention provides an intelligent instrument transmission system for oil and gas pipeline stations based on AUTBUS bus. Summary of the invention

[0006] In order to solve the above problems in the prior art, that is, in the prior art, a large amount of data collected by the instrument itself cannot be uploaded to the control system, the scale of the entire control system will be very large when facing big data, and the traditional connection method requires the consumption of a large number of control cables, explosion-proof junction boxes, cable trays, and installation bulk materials, the present invention provides an oil and gas pipeline station intelligent instrument transmission system based on AUTBUS bus;

[0007] The system includes a host computer, a PLC controller, an AUTBUS bus transmission device, and an AUTBUS terminal device;

[0008] The host computer is connected to the PLC controller and sends a control signal;

[0009] The PLC controller controls the signal transmission of the AUTBUS bus transmission device according to the control signal; the PLC controller includes a main control module and a standby control module, and the main control module is used to work in a normal state, and the standby control module is used to work when a fault is detected in the main control module;

[0010] The AUTBUS bus transmission device is used to transmit signals to the AUTBUS terminal device; the AUTBUS bus transmission device includes an AUTBUS bus network, at least one AUTBUS master station, at least one AUTBUS slave station and at least one AUTBUS agent; the AUTBUS bus network is a dual ring network;

[0011] The AUTBUS master station is used to collect data from the AUTBUS terminal device and process the control signal through the AUTBUS bus network; the AUTBUS master station includes a main AUTBUS master station and a standby AUTBUS master station; the main AUTBUS master station and the standby AUTBUS master station are both connected to the main control module and the standby control module;

[0012] The AUTBUS slave station is connected to the AUTBUS master station through the AUTBUS bus network. The AUTBUS slave station is used to complete data reporting and passively receive control signals issued by the AUTBUS master station according to the configuration requirements of the AUTBUS master station, and send the control signals to the AUTBUS terminal device;

[0013] The AUTBUS agent is used to transmit the allocation result of the communication resources by the AUTBUS master station to the AUTBUS terminal device through the AUTBUS bus network, and to perform real-time scheduling and management of the communication resources;

[0014] The AUTBUS terminal device is connected to the AUTBUS slave station, and the AUTBUS terminal device includes a gas pipeline station intelligent meter.

[0015] In some preferred implementations, the primary AUTBUS master station and the backup AUTBUS master station are connected to each other.

[0016] In some preferred implementations, the AUTBUS proxy includes a main AUTBUS proxy and a standby AUTBUS proxy connected to each other; the main AUTBUS proxy and the standby AUTBUS proxy are both connected to the main AUTBUS master station and the standby AUTBUS master station.

[0017] In some preferred embodiments, the AUTBUS bus network is a dual ring network;

[0018] The AUTBUS master station is provided with an ETH communication module, and the AUTBUS agent is respectively connected to the ETH communication module and the first ring network in the double ring network; and / or the AUTBUS agent is connected to the ETH communication module and the second ring network in the double ring network; the AUTBUS master station and the plurality of the AUTBUS slave stations are respectively connected to the first ring network and / or the second ring network;

[0019] The first ring network and the second ring network are connected to each other.

[0020] In some preferred embodiments, the first ring network and the second ring network are connected via a T-type connector; the first ring network and the second ring network are both fixed to the T-type connector, and the T-type connector is connected to the AUTBUS slave station via a Y-type or F-type connector.

[0021] In some preferred embodiments, the smart meter includes a plurality of pressure transmitters, temperature transmitters, liquid level transmitters, flow transmitters and valve actuators, and the number of the AUTBUS slave stations is consistent with the number of the smart meters and is connected in a one-to-one correspondence.

[0022] In some preferred embodiments, the valve actuator includes an electric actuator, a gas-liquid actuator, or an electro-hydraulic actuator used in oil and gas pipeline stations.

[0023] In some preferred implementations, when the fault management protocol identifies that the primary AUTBUS master station fails, the primary AUTBUS master station is switched to the backup AUTBUS master station.

[0024] In some preferred embodiments, when the link distance between the AUTBUS master station and the AUTBUS slave station exceeds a set distance, the AUTBUS proxy is set as an independent device in the field device layer network and connected to the AUTBUS terminal device via an AUTBUS cable and a connector.

[0025] In some preferred implementations, the main control module and the standby control module are interconnected to achieve data and control redundancy backup.

[0026] Beneficial effects of the present invention:

[0027] (1) The network structure of the present invention is reasonable and redundant. The number of AUTBUS slave stations and terminal devices can be set according to engineering requirements. By adopting a double ring network to connect the intelligent instruments of the oil and gas pipeline station, the traditional wiring method is improved to a point-to-point connection type, the number of cables in the oil and gas pipeline station is reduced, the number of control system cabinets, the number of supporting IO cards and surge protectors in the cabinets is reduced, the amount of cable trays / trough boxes used in cable laying, and the amount of bulk material installation is reduced, the area between the station cabinets is saved, the power supply load of the station UPS is reduced, the construction period of the oil and gas pipeline station project is shortened, and the workload of future production and operation maintenance is reduced.

[0028] (2) According to statistics, if an oil and gas pipeline station is designed with the system of the present invention, it can reduce 60% of the instrument cables in a single station; reduce 40% of the investment in the control system; save 30% of the land between cabinets; save 40% of the investment in UPS power supply; significantly save the investment in cable trays and cable trenches in the station; save 60% of the construction period for cable wiring; and improve the digital transmission signal capability of station instruments. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0030] Figure 1 It is a connection diagram of an intelligent instrument transmission system for oil and gas pipeline stations based on AUTBUS bus of the present invention. DETAILED DESCRIPTION

[0031] The present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the relevant invention are shown in the accompanying drawings.

[0032] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0033] like Figure 1 As shown, the present invention provides an intelligent instrument transmission system for oil and gas pipeline stations based on AUTBUS bus, the system includes a host computer, a PLC controller, an AUTBUS bus transmission device, and an AUTBUS terminal device;

[0034] The host computer is connected to the PLC controller and sends a control signal;

[0035] The PLC controller controls the signal transmission of the AUTBUS bus transmission device according to the control signal; the PLC controller includes a main control module and a standby control module, and the main control module is used to work in a normal state, and the standby control module is used to work when a fault is detected in the main control module;

[0036] The AUTBUS bus transmission device is used to transmit signals to the AUTBUS terminal device; the AUTBUS bus transmission device includes an AUTBUS bus network, at least one AUTBUS master station, at least one AUTBUS slave station and at least one AUTBUS agent; the AUTBUS bus network is a dual ring network;

[0037] The AUTBUS master station is used to collect data from the AUTBUS terminal device and process the control signal through the AUTBUS bus network; the AUTBUS master station includes a main AUTBUS master station and a standby AUTBUS master station; the main AUTBUS master station and the standby AUTBUS master station are both connected to the main control module and the standby control module;

[0038] The AUTBUS slave station is connected to the AUTBUS master station through the AUTBUS bus network. The AUTBUS slave station is used to complete data reporting and passively receive control signals issued by the AUTBUS master station according to the configuration requirements of the AUTBUS master station, and send the control signals to the AUTBUS terminal device;

[0039] The AUTBUS agent is used to transmit the allocation result of the communication resources by the AUTBUS master station to the AUTBUS terminal device through the AUTBUS bus network, and to perform real-time scheduling and management of the communication resources;

[0040] The AUTBUS terminal device is connected to the AUTBUS slave station, and the AUTBUS terminal device includes a gas pipeline station intelligent meter.

[0041] The configuration requirements are based on the data capability options provided by the slave device, such as: periodic reporting of data sets, real-time alarm data sets, and configuration of the type and period of the reported data sets.

[0042] The communication resource is the bandwidth required for the AUTBUS master station and the AUTBUS slave station to communicate.

[0043] Among them, for the AUTBUS bus network, AUTBUS is an industrial field bus that uses two-wire non-bridge media, has multiple nodes, high bandwidth, high real-time, and long-distance transmission. The bus data bandwidth reaches 100Mbps, the maximum transmission distance is 500 meters, the minimum cycle period is 8 microseconds, the maximum number of nodes is 256, the transmission bit error rate is better than 10-11, and bus virtualization and asymmetric encryption are provided, and IPV4 / V6 addressing mapping space is provided; the AUTBUS bus can increase or decrease the number of nodes on the network at any time, and when the network nodes are increased or decreased, the communication functions of other nodes will not be affected.

[0044] In the actual networking, there are at least two physical entity devices, namely, an AUTBUS master station and an AUTBUS slave station. The AUTBUS proxy may exist on the same physical device as the AUTBUS master station, or may exist as an independent physical device.

[0045] The AUTBUS slave device may have intelligent calculation and analysis functions, and its processing method may depend on the configuration of the master station. The processing result may also be sent to the master station for further processing based on the configuration.

[0046] Among them, the AUTBUS agent sends the allocation result of the communication resources of the AUTBUS master station to all AUTBUS slave devices, and performs real-time scheduling and management of the communication resources; by default, the AUTBUS agent and the AUTBUS master station are located in the same device or module unit. If the link distance between the AUTBUS master station and the AUTBUS slave station in the AUTBUS network is far, exceeding the transmission capacity of the IEC 61158Type28 bus physical layer in a single network, the AUTBUS agent will exist as an independent device in the field device layer network, and connect to the AUTBUS slave station device through the AUTBUS cable and connector. At the same time, the AUTBUS agent will parse the configuration and control sent by the AUTBUS master station, and send it to the AUTBUS slave station for processing in real time, and encapsulate the data sent by the AUTBUS slave station and transparently transmit it to the AUTBUS master station.

[0047] Preferably, see Figure 1 The main AUTBUS master station and the backup AUTBUS master station are connected to each other.

[0048] Among them, the main AUTBUS master station and the backup AUTBUS master station are connected for data backup.

[0049] Among them, the number of AUTBUS agents is consistent with the number of AUTBUS master stations, that is, the AUTBUS agent also includes a main AUTBUS agent and a standby AUTBUS agent. The main AUTBUS agent is respectively connected to the main AUTBUS master station, the standby AUTBUS master station and the AUTBUS ring bus, and the standby AUTBUS agent is respectively connected to the main AUTBUS master station, the standby AUTBUS master station and the AUTBUS ring bus.

[0050] The AUTBUS master station and multiple AUTBUS slave stations are respectively connected to the first ring network or / and the second ring network to realize dual ring network redundancy, and can simultaneously realize the uplink and downlink transmission modes of the signal. The downlink transmission mode is that the host computer sends commands to be output to the corresponding smart meter terminal through the PLC controller, the AUTBUS master station and the AUTBUS slave station respectively, which is convenient for the reading and collection control of the smart meter data and improves the communication performance.

[0051] Preferably, see Figure 1 The AUTBUS agent includes a main AUTBUS agent and a standby AUTBUS agent connected to each other; the main AUTBUS agent and the standby AUTBUS agent are both connected to the main AUTBUS master station and the standby AUTBUS master station.

[0052] Preferably, see Figure 1, the AUTBUS master station is provided with an ETH communication module, the AUTBUS agent is respectively connected to the ETH communication module and the first ring network in the double ring network; and / or the AUTBUS agent is connected to the ETH communication module and the second ring network in the double ring network; the AUTBUS master station and the plurality of the AUTBUS slave stations are respectively connected to the first ring network and / or the second ring network;

[0053] The first ring network and the second ring network are connected to each other.

[0054] Preferably, see Figure 1 The first ring network and the second ring network are connected via a T-type connector; the first ring network and the second ring network are both fixed to the T-type connector, and the T-type connector is connected to the AUTBUS slave station via a Y-type or F-type connector.

[0055] The first ring network and the second ring network are connected via a plurality of T-connectors to achieve dual ring network redundancy and backup. When any one ring network fails, it can automatically switch to the other ring network to achieve data communication.

[0056] Preferably, see Figure 1 The smart instrument includes multiple pressure transmitters, temperature transmitters, liquid level transmitters, flow transmitters and valve actuators. The number of the AUTBUS slave stations is consistent with the number of the smart instruments and is connected one-to-one.

[0057] Preferably, see Figure 1 The valve actuators include electric actuators, gas-liquid actuators, and electro-hydraulic actuators used in oil and gas pipeline stations.

[0058] Among them, valve actuators include electric actuators, gas-liquid actuators, and electro-hydraulic actuators used in oil and gas pipeline stations, and instruments include temperature, pressure, flow, liquid level, etc. The number of instruments and valve actuators can be selected according to needs, and the corresponding number of AUTBUS slave stations can be selected and placed in the instruments and valve actuators, so that each instrument and valve actuator is connected to the corresponding AUTBUS slave station, so that each instrument and valve actuator can have communication functions at the industrial site. Each AUTBUS slave station completes data reporting and control command processing in accordance with the configuration requirements of the AUTBUS master station, which is convenient for direct signal transmission, and the signal transmission is completed on site, realizing decentralized control of equipment units.

[0059] Preferably, see Figure 1 When the fault management protocol identifies that the main AUTBUS master station fails, the main AUTBUS master station is switched to the backup AUTBUS master station.

[0060] Preferably, see Figure 1 When the link distance between the AUTBUS master station and the AUTBUS slave station exceeds a set distance, the AUTBUS proxy is set as an independent device in the field device layer network and connected to the AUTBUS terminal device through an AUTBUS cable and a connector.

[0061] Preferably, see Figure 1 The main control module and the standby control module are connected to each other to achieve data and control redundant backup.

[0062] The above technical solution has the following four working modes, specifically: the main AUTBUS master station and the main control module work, the main AUTBUS master station and the standby control module work, the standby AUTBUS master station and the main control module work, and the standby AUTBUS master station and the standby control module work. Among them, the working process of the main AUTBUS master station and the main control module is as follows: the main AUTBUS master station outputs signals to the main control module and the standby control module, wherein the signal output to the standby control module is not processed, at this time, the standby AUTBUS master station has no signal output or the signals output by the standby AUTBUS master station to the main control module and the standby control module are not processed; when the main control module cannot receive the signal sent by the main AUTBUS master station, it is determined that the main AUTBUS master station is faulty at this time, and the main control module switches to the standby AUTBUS master station to work normally, that is, the standby AUTBUS master station outputs signals to the main control module and the standby control module, wherein the signal output to the standby control module is not processed, at this time, the main AUTBUS master station has no signal output or the signals output by the main AUTBUS master station to the main control module and the standby control module are not processed.

[0063] The other working modes, namely the working process of the main AUTBUS master station and the standby control module, the working process of the standby AUTBUS master station and the main control module, and the working process of the standby AUTBUS master station and the standby control module are the same as the working process of the main AUTBUS master station and the main control module mentioned above, and will not be repeated here.

[0064] The main AUTBUS master station and the standby AUTBUS master station are controlled by the main control module and the standby control module. When the main AUTBUS master station fails, the main control module or the standby control module controls the switching of the main AUTBUS master station and the standby AUTBUS master station. Therefore, when the main AUTBUS master station fails, the standby AUTBUS master station can collect data and issue control commands to all device nodes of the device unit, thereby improving the reliability of signal transmission.

[0065] The terms "first", "second", etc. are used to distinguish similar objects rather than to describe or indicate a particular order or sequence.

[0066] The term "comprise" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or also includes elements inherent to such process, method, article, or apparatus / device.

[0067] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. An intelligent instrument transmission system for oil and gas pipeline stations based on AUTBUS bus, characterized in that: The system includes a host computer, a PLC controller, an AUTBUS bus transmission device, and an AUTBUS terminal device; The host computer is connected to the PLC controller and sends a control signal; The PLC controller controls the signal transmission of the AUTBUS bus transmission device according to the control signal; the PLC controller includes a main control module and a standby control module, and the main control module is used to work in a normal state, and the standby control module is used to work when a fault is detected in the main control module; The AUTBUS bus transmission device is used to transmit signals to the AUTBUS terminal device; the AUTBUS bus transmission device includes an AUTBUS bus network, at least one AUTBUS master station, at least one AUTBUS slave station and at least one AUTBUS agent; the AUTBUS bus network is a dual ring network; The AUTBUS master station is used to collect data from the AUTBUS terminal device and process the control signal through the AUTBUS bus network; the AUTBUS master station includes a main AUTBUS master station and a standby AUTBUS master station; the main AUTBUS master station and the standby AUTBUS master station are both connected to the main control module and the standby control module; The AUTBUS slave station is connected to the AUTBUS master station through the AUTBUS bus network. The AUTBUS slave station is used to complete data reporting and passively receive control signals issued by the AUTBUS master station according to the configuration requirements of the AUTBUS master station, and send the control signals to the AUTBUS terminal device; The AUTBUS agent is used to transmit the allocation result of the communication resources by the AUTBUS master station to the AUTBUS terminal device through the AUTBUS bus network, and to perform real-time scheduling and management of the communication resources; The AUTBUS terminal device is connected to the AUTBUS slave station, and the AUTBUS terminal device includes a gas pipeline station intelligent meter.

2. According to claim 1, an intelligent instrument transmission system for oil and gas pipeline stations based on AUTBUS bus is characterized in that: The main AUTBUS master station and the standby AUTBUS master station are connected to each other.

3. According to the AUTBUS bus-based intelligent instrument transmission system for oil and gas pipeline stations according to claim 1, it is characterized in that: The AUTBUS agent includes a main AUTBUS agent and a standby AUTBUS agent connected to each other; The primary AUTBUS proxy and the backup AUTBUS proxy are both connected to the primary AUTBUS master station and the backup AUTBUS master station.

4. According to claim 3, an intelligent instrument transmission system for oil and gas pipeline stations based on AUTBUS bus is characterized in that: The AUTBUS master station is provided with an ETH communication module, and the AUTBUS agent is respectively connected to the ETH communication module and the first ring network in the double ring network; and / or the AUTBUS agent is connected to the ETH communication module and the second ring network in the double ring network; the AUTBUS master station and the plurality of the AUTBUS slave stations are respectively connected to the first ring network and / or the second ring network; The first ring network and the second ring network are connected to each other.

5. According to claim 4, an intelligent instrument transmission system for oil and gas pipeline stations based on AUTBUS bus is characterized in that: The first ring network and the second ring network are connected via a T-type connector; the first ring network and the second ring network are both fixed to the T-type connector, and the T-type connector is connected to the AUTBUS slave station via a Y-type or F-type connector.

6. The intelligent instrument transmission system for oil and gas pipeline stations based on AUTBUS bus according to claim 5 is characterized in that: The smart instrument comprises a plurality of pressure transmitters, temperature transmitters, liquid level transmitters, flow transmitters and valve actuators. The number of the AUTBUS slave stations is consistent with the number of the smart instruments and they are connected in a one-to-one correspondence.

7. The intelligent instrument transmission system for oil and gas pipeline stations based on AUTBUS bus according to claim 6 is characterized in that: The valve actuators include electric actuators, gas-liquid actuators, and electro-hydraulic actuators used in oil and gas pipeline stations.

8. The intelligent instrument transmission system for oil and gas pipeline stations based on AUTBUS bus according to claim 7 is characterized in that: When the fault management protocol identifies that the primary AUTBUS master station fails, the primary AUTBUS master station is switched to the backup AUTBUS master station.

9. The intelligent instrument transmission system for oil and gas pipeline stations based on AUTBUS bus according to claim 7 is characterized in that: When the link distance between the AUTBUS master station and the AUTBUS slave station exceeds a set distance, the AUTBUS proxy is set as an independent device in the field device layer network and connected to the AUTBUS terminal device through an AUTBUS cable and a connector.

10. The intelligent instrument transmission system for oil and gas pipeline stations based on AUTBUS bus according to claim 9 is characterized in that: The main control module and the standby control module are connected to each other to achieve data and control redundancy backup.

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