An axial compressor system supporting distributed control

Abstract

The application relates to the technical field of industrial automation, and particularly provides an axial flow compressor system supporting distributed control, which comprises a controller and a plurality of remote IO modules, one remote IO module is arranged in different unit composition modules of a compressor unit; a first remote IO module corresponding to a shafting equipment sub-module is used for monitoring host equipment body measuring points; a second remote IO module corresponding to an auxiliary machine sub-module is used for monitoring fan inlet and exhaust pipeline measuring points, lubricating oil power oil system measuring points and water system measuring points; a third remote IO module corresponding to a process measuring point sub-module is used for monitoring process pipeline measuring points; and a fourth remote IO module corresponding to an electrical sub-module is used for monitoring electrical system measuring points. The application monitors corresponding unit composition modules through the plurality of remote IO modules, so that the system hardware reliability is improved, the space requirement between centralized control cabinets is reduced, and the arrangement is flexible and strong in adaptability.

Description

Technical Field

[0001] This application relates to the field of industrial automation technology, and in particular to an axial compressor system that supports distributed control. Background Technology

[0002] Large axial compressors, as key process equipment in industrial enterprises, are fundamental to the safe and efficient operation of process systems. During operation, as a front-end component of a turbine unit, the axial compressor's primary task is to provide the turbine unit with a working medium with sufficient energy. Driven by a motor or other power source, the impeller of the axial compressor rotates, causing the incoming outside air to rotate along with the impeller and gain axial velocity, being propelled downstream of the impeller. Simultaneously, as the gas is compressed under the action of the rotating impeller, its pressure energy increases. The compressor must ensure that the discharged gas flow rate and pressure meet the operating requirements of the turbine unit. During this operation, a safety control system is needed to precisely coordinate and control the axial compressor and turbine to ensure the stable operation of the entire turbine unit. Therefore, safe, reliable, and precise control of the axial compressor is a crucial requirement.

[0003] Existing safety control systems for axial compressors employ a centralized control approach. This involves connecting all compressor control-related signals (such as process piping instrument valve signals, auxiliary oil station and water system signals, main unit shaft equipment and instrument signals, high-voltage electrical handover signals, and low-voltage electrical handover signals) from various control points to a centralized control cabinet via hardwiring. However, in existing industrial settings with safety control systems, unplanned unit shutdowns frequently occur due to signal interference. Furthermore, signal attenuation caused by signal cables can easily lead to system errors, thus affecting control accuracy. Utility Model Content

[0004] To address the aforementioned issues, this application provides an axial compressor system that supports distributed control. The controller monitors the corresponding axial compressor unit modules through multiple remote I / O modules, thereby improving the system's hardware reliability while reducing the space requirements of centralized control cabinets. Furthermore, the system offers flexible and adaptable layout.

[0005] To achieve the objectives of this application, the following technical solution is provided:

[0006] In a first aspect, this application provides an axial compressor system supporting distributed control, including an axial compressor unit, a controller, and several remote I / O modules; wherein, a remote I / O module is respectively provided in the shaft equipment submodule, auxiliary machine submodule, process measurement point submodule, and power distribution module of the axial compressor unit, and the communication interfaces of the several remote I / O modules are simultaneously connected to the controller through a first DP communication bus;

[0007] The first remote I / O module corresponding to the shaft system equipment submodule is installed within the installation platform of the axial compressor unit and is used to monitor the equipment body measurement points of the main unit of the axial compressor unit; the second remote I / O module corresponding to the auxiliary machine submodule is used to monitor the equipment measurement points of the fan intake and exhaust pipelines, as well as the measurement points of the lubricating oil, power oil system, and water system; the third remote I / O module corresponding to the process measurement point submodule is used to monitor the process pipeline measurement points; the fourth remote I / O module corresponding to the electronic distribution module is installed in the electrical cabinet and is used to monitor the electrical system measurement points of the axial compressor unit.

[0008] The controller is used to read the field IO signals of the axial compressor unit through each of the remote IO modules, and control the shaft system equipment submodule, auxiliary machine submodule, process measurement point submodule and power distribution module according to the read field IO signals, so as to realize the distributed control of the shaft system equipment submodule, auxiliary machine submodule, process measurement point submodule and power distribution module.

[0009] In one possible implementation, the controller includes at least a first frame and a second frame; the first frame includes a first control device, and the second frame includes a second control device; the first control device reads the host field I / O signals of the shaft equipment submodule through the first remote I / O module, and controls the host based on control commands according to the read host field I / O signals; the second control device reads the matching I / O signals of the auxiliary machine submodule, the process measurement point submodule, and the power distribution module through the second remote I / O module, the third remote I / O module, and the fourth remote I / O module, and controls the auxiliary machine submodule, the process measurement point module, and the power distribution module based on control commands according to the read matching I / O signals.

[0010] In one possible implementation, the first remote I / O module is connected to the shaft system instruments of the axial compressor unit and the equipment body within the installation platform via a shielded signal line. The first remote I / O module is used to collect the operating information of the shaft system equipment sub-module and send it to the controller. The controller outputs control commands after logical operations and processing, and the control commands are then transmitted to the shaft system equipment sub-module for response via the first remote I / O module.

[0011] In one possible implementation, the monitoring signals for the device body include vibration signals, displacement signals, and temperature signals of the host; the control points corresponding to the vibration signals, displacement signals, and temperature signals of the host are connected to the terminals corresponding to the first remote I / O module via conduits.

[0012] In one possible implementation, the power distribution module includes a first high-voltage power distribution module and a second low-voltage power distribution module. A fifth remote I / O module corresponding to the first high-voltage power distribution module is installed in a high-voltage electrical cabinet. The fifth remote I / O module is connected to electrical alarm signals, circuit breaker status signals, relay protection signals, contact temperature, and real-time power signals in the high-voltage electrical cabinet for monitoring. A sixth remote I / O module corresponding to the second low-voltage power distribution module is installed in a low-voltage electrical cabinet. The sixth remote I / O module is connected to the oil pump motor current signal, power signal, opening and closing status signal, gate power distribution status signal, turning gear power distribution status, and operating status signal of the low-voltage power distribution system for aggregated monitoring.

[0013] In one possible implementation, the high-voltage electrical cabinet further includes a circuit breaker, a current transformer, and a protection device. The circuit breaker, the current transformer, and the protection device are respectively connected to the electrical alarm signal, the circuit breaker status signal, the relay protection signal, the contact temperature, and the real-time power signal, and are used to perform protection on the high-voltage electrical cabinet through the controller.

[0014] In one possible implementation, the process piping auxiliary parameters include, but are not limited to, the signal parameters of pressure transmitters, temperature resistance thermometers, flow meters, differential pressure transmitters, valve limit switches, valve position sensors, and valve electric actuators on each process pipeline.

[0015] In one possible implementation, the system further includes a host computer module, which is connected to the controller via a first PN communication connection line; the host computer module is used to control the axial compressor unit based on the monitoring information of the controller.

[0016] In one possible implementation, the system further includes a redundant controller; the redundant controller is connected to the interface modules of the first remote I / O module, the second remote I / O module, the third remote I / O module, and the fourth remote I / O module respectively via a second DP communication bus; the redundant controller is also connected to the host computer module via a second PN communication connection line.

[0017] In one possible implementation, the controller and the redundant controller are connected via a synchronous optical fiber.

[0018] In one possible implementation, the system further includes a first power supply and a second power supply; the first power supply is connected to the controller and is connected to the first power ports of the first remote I / O module, the second remote I / O module, the third remote I / O module, and the fourth remote I / O module, respectively; the second power supply is also connected to the controller and is connected to the second power ports of the first remote I / O module, the second remote I / O module, the third remote I / O module, and the fourth remote I / O module, respectively.

[0019] The axial compressor system supporting distributed control provided in this application, combined with the characteristics of compressor process layout, distributes multiple remote I / O modules in the corresponding unit plant, equipment platform, and high and low voltage power distribution room. Remote redundant monitoring is performed through the controller, which improves the hardware reliability of the system, reduces the space requirements of the centralized control cabinet, and allows for flexible layout that can be added or removed according to the actual plant layout. It is easy to design and highly adaptable; at the same time, it reduces the failure rate caused by a large number of hard wiring connections. Attached Figure Description

[0020] The accompanying drawings are provided to further understand this application and form part of the specification. They are used together with the embodiments of this application to explain this application and do not constitute a limitation thereof.

[0021] Figure 1 This is a schematic diagram of an axial compressor system supporting distributed control, provided as an embodiment of this application. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of this application, unless otherwise stated, "multiple" means two or more.

[0024] An axial compressor is a device that uses rotating blades to do work on gas, causing the gas to flow axially and be compressed. It is primarily based on fluid dynamics principles, converting mechanical energy into the pressure and kinetic energy of the gas. As a front-end component of a turbine unit, the axial compressor's main task is to provide the turbine unit with a sufficient energy medium. Its operation mainly involves the comprehensive coordination of five parts: 1) the unit's shaft system equipment and its corresponding instruments; 2) process system measuring points; 3) auxiliary systems such as the oil system; 4) the high-voltage power distribution system; and 5) the low-voltage power distribution system. The unit's shaft system includes impellers, shafts, and bearings; instruments include tachometers, vibration sensors, and axial displacement sensors. To ensure the compressor's temperature operation, the instruments monitor the operating status of the shaft system in real time and feed the signals back to the control system. The process system's measuring points may include temperature measuring points located at multiple key positions within the unit, pressure measuring points distributed along the channels between the compressor's inlet, outlet, and each stage of the impeller, and flow measuring points used to measure the gas flow rate entering and exiting the compressor. This provides crucial information for evaluating and controlling the compressor's operating status. The auxiliary systems include the oil system, which includes an oil tank that provides the oil source for the entire oil system. The system includes an oil pump, oil filter, and oil cooler, as well as an auxiliary system including an intake filter and a silencer. Through close cooperation between the auxiliary systems such as the oil system and the compressor main unit, it provides support and guarantee for the normal operation of the compressor; 4) High-voltage power distribution system, including a high-voltage electrical cabinet, provides a power source for the compressor through close cooperation with the compressor motor; 5) Low-voltage power distribution system, including a low-voltage electrical cabinet, fuses, contactors, relays, etc., is used to provide electrical energy to the various auxiliary systems and instruments of the compressor. It works closely with the high-voltage power distribution system, the compressor main unit, and other auxiliary systems to ensure that the compressor can start, run, and stop according to the predetermined procedures and requirements.

[0025] During this operation, precise and coordinated control of the axial compressor and turbine is required through a safety control system to ensure the stable operation of the entire turbine unit. Therefore, safe, reliable, and precise control of the axial compressor is a crucial requirement. However, existing centralized control methods unify process piping instrument valve signals, auxiliary oil station and water system signals, main engine shaft equipment and instrument signals, high-pressure gas handover signals, and low-pressure electrical handover signals by connecting each control point to a centralized control cabinet via hardwiring, thus forming a control system. The main problems with this control system are as follows:

[0026] 1) During the laying of numerous lines in industrial sites, they are prone to intersecting and running in parallel. Electromagnetic coupling may occur between different signals, leading to signal interference. At the same time, analog signals are inherently susceptible to interference. Moreover, different types of signals have different levels, frequencies, and other characteristics. When transmitted in the same hard-wired system, they are prone to mutual interference, which can easily cause unplanned shutdowns of the unit due to signal interference, or even damage to the unit.

[0027] 2) The wiring distance from each measuring point to the central control cabinet is long, and the signal cable diameter is relatively thin, which will cause signal attenuation, resulting in control system errors and thus affecting control accuracy;

[0028] 3) The factory design must meet the needs of a large number of pipelines, which requires high spatial layout of the industrial site and high explosion-proof standards. Under tight space conditions, it is easy to cause high-density layout of pipelines that cross and overlap, resulting in operational hazards and difficulties in maintenance and debugging.

[0029] To address the aforementioned technical problems, the present invention proposes the following technical solutions and corresponding embodiments.

[0030] Example 1

[0031] The following is combined Figure 1 The embodiments shown illustrate the technical solution of the present invention.

[0032] Figure 1 A schematic diagram of a distributed control axial compressor system according to an embodiment of this application is shown, as follows: Figure 1 As shown, the axial compressor system supporting distributed control in this application embodiment includes: a controller and several remote IO modules (remote IO station 1, remote IO station 2, remote IO station 3, remote IO station 4, and remote IO station 5); wherein each remote IO module is deployed in a certain unit component module of the axial compressor unit, and the axial compressor unit includes several unit component modules.

[0033] The plurality of unit components include a shaft system equipment submodule (measuring points of the main equipment), a process measuring point submodule (measuring points of the process system instrumentation equipment), an auxiliary equipment submodule (measuring points of the auxiliary equipment), a first high-voltage power distribution module (measuring points of the high-voltage power distribution system), and a second low-voltage power distribution module (measuring points of the low-voltage power distribution system); the remote I / O modules corresponding to the plurality of unit components include: a first remote I / O module corresponding to the shaft system equipment submodule, a second remote I / O module corresponding to the auxiliary equipment submodule, a third remote I / O module corresponding to the process measuring point submodule, a fifth remote I / O module corresponding to the first high-voltage power distribution module, and a sixth remote I / O module corresponding to the second low-voltage power distribution module. The first remote I / O module is installed within the mounting platform of the axial compressor unit and is used to monitor the equipment body measurement points of the main unit of the axial compressor unit. The second remote I / O module is used to monitor the measurement points of related equipment in the fan's inlet and outlet process pipelines, as well as the measurement points of the lubricating oil, power oil system, and water system. The third remote I / O module is used to monitor the process pipeline measurement points (auxiliary parameters). The second and third remote I / O modules are housed in the axial compressor unit plant via the same protective enclosure. The fourth remote I / O module (including the fifth and sixth remote I / O modules) is installed in the electrical cabinet and is used to monitor the electrical system measurement points of the axial compressor unit. It should be understood that the above examples are merely illustrative, and this utility model is not limited thereto.

[0034] The first, second, third, and fourth remote I / O modules are connected to the controller via a DP communication bus. This allows the controller to read the field I / O signals of each unit component module in real-time or periodically, generate control commands based on these signals, and send these commands to the corresponding unit component module, thereby controlling the operation of different unit component modules. Specifically, after receiving the operating information from each remote I / O module, the controller calculates and generates control commands, transmits these commands to the corresponding unit component module via the remote I / O modules for execution, and then feeds back the execution information to the controller.

[0035] The control unit can be a programmable logic controller (PLC), a central processing unit (CPU), or something similar, and is capable of receiving and processing information.

[0036] In one feasible implementation, the controller includes at least a first frame and a second frame, wherein the first frame includes a first control device, and the second frame includes a second control device. The first control device reads the host field I / O signals of the shaft equipment submodule via a first remote I / O module, and performs control of the host based on control commands according to the read host field I / O signals. The second control device reads the corresponding I / O signals of the auxiliary machine submodule, process measurement point submodule, and power distribution module via a second, third, and fourth remote I / O module, respectively, and performs control of the auxiliary machine submodule, process measurement point module, and power distribution module based on control commands according to the read corresponding I / O signals.

[0037] As one possible implementation, the controller includes five racks, each rack being used to individually control a unit module based on a remote I / O module.

[0038] In this embodiment, the remote I / O module includes a receiving submodule and an output submodule. The receiving submodule receives signals / commands from various instruments, sensors, or nodes and outputs these signals / commands to the controller. The output submodule connects the controller and the actuator of the axial compressor unit, and receives commands from the controller to control the execution actions of the actuator. Exemplarily, the receiving submodule can be a PNP-type DI digital input module, an NPN-type DI digital input module, etc., and can be configured to have input functionality to input commands, which are then transmitted to the controller. The output submodule can be a source-type DO digital output module, a sink-type DO digital output module, etc., and can be configured to receive commands from the control unit and output signals to the actuator.

[0039] In this embodiment, combining the characteristics of axial flow compressors and typical plant layouts, the five major subsystems—shaft system equipment and instruments, process piping instruments, oil system and process piping instruments, valves, and other auxiliary equipment distributed on-site, high-voltage power distribution, and low-voltage power distribution—are each connected to multiple independent remote I / O points. This makes the signal destination of each subsystem clear, facilitates the installation and commissioning of new units, and allows for accurate location of problems based on clear subsystem divisions, improving efficiency and reducing mutual interference between subsystems. Simultaneously, it reduces the amount of cable materials and construction work required for centralized control of traditional large axial flow fans, lowers costs, reduces construction difficulty, reduces overlapping construction, reduces construction safety risks, and effectively shortens the construction period. For example, a typical electric axial flow unit has approximately 230 signal loops; each line will reduce the amount of cables, cable trays, and man-days required for local remote I / O to the control room, with an estimated direct economic benefit of at least 80,000 yuan.

[0040] In this embodiment, the power distribution module includes a first high-voltage power distribution module and a second low-voltage power distribution module. A fifth remote I / O module corresponding to the first high-voltage power distribution module is installed in a high-voltage electrical cabinet. This fifth remote I / O module is connected to electrical alarm signals, circuit breaker status signals, relay protection signals, contact temperature, and real-time power signals in the high-voltage electrical cabinet for monitoring. A sixth remote I / O module corresponding to the second low-voltage power distribution module is installed in a low-voltage electrical cabinet. This sixth remote I / O module is connected to the oil pump motor current signal, power signal, opening / closing status signal, gate power distribution status signal, turning gear power distribution status, and operating status signal of the low-voltage power distribution system for comprehensive monitoring.

[0041] In this embodiment, the high-voltage electrical cabinet further includes a circuit breaker, a current transformer, and a protection device. The circuit breaker, the current transformer, and the protection device are respectively connected to the electrical alarm signal, the circuit breaker status signal, the relay protection signal, the contact temperature, and the real-time power signal, for use in performing protection on the high-voltage electrical cabinet via a controller. Specifically, the fifth remote I / O module is integrated within the high-voltage electrical cabinet, connecting to electrical system measurement points in the high-voltage distribution room, including electrical alarm signals, circuit breaker status signals, relay protection signals, contact temperature, and real-time power information.

[0042] In this embodiment, the sixth remote I / O module is integrated in the low-voltage electrical cabinet, which aggregates the oil pump motor current, power, opening and closing status, valve power distribution status, turning gear power distribution and operating status of the low-voltage power distribution system.

[0043] As one feasible implementation, the first remote I / O module is installed as a complete set in the control box next to the unit, and is arranged as a whole on the installation platform of the axial flow fan unit in the plant. The vibration, displacement, temperature and other equipment signals and control points of the main unit are connected to the terminals of the first remote I / O module nearby through conduits. The second remote I / O module is equipped with a protection box and installed in the plant. The process system signals such as process piping instruments (pressure transmitters, temperature resistance thermometers, flow meters, differential pressure transmitters), valves (limit switches, position sensors, electric actuators), etc., are connected to the terminals of the second remote I / O module nearby through conduits. The third remote I / O module is installed as a complete set in a protection box and arranged as a whole in the axial flow fan plant. The valves and instruments of the fan's inlet and outlet process piping; the measuring points of the lubricating oil and power oil system, the water system and other distributed auxiliary measuring points are connected to the terminals of the third remote I / O module nearby through conduits. The fifth remote I / O module is housed in the high-voltage electrical cabinet, which also integrates circuit breakers, transformers, and protection devices. It connects to high-voltage power distribution room electrical alarm signals, circuit breaker status signals, relay protection signals, contact temperature, real-time power information, and other high-voltage system measurement points. Cable trays within each signal cabinet or across panels connect to the terminals of the fifth remote I / O module. The sixth remote I / O module is integrated in the low-voltage cabinet, summarizing the oil pump motor current, power, opening and closing status, valve power distribution status, turning gear power distribution, and operating status of the low-voltage power distribution system. Cable trays within each signal cabinet connect to the terminals of the sixth I / O module. Thus, based on the actual distribution of the axial flow fan's control measurement points and the controlled equipment, the remote I / O modules are strategically placed in the high and low voltage power distribution rooms, within the plant, and on the unit's operating platform, ensuring proximity to control points and equipment for convenient and quick commissioning. Each group of distributed I / O is arranged separately to reduce mutual interference between I / O groups; at the same time, it reduces the possibility of interference or even high voltage intrusion caused by crossing power cables in hard-wiring layout, which could damage the control system and equipment.

[0044] In the embodiments of this application, reference is made to Figure 1As shown, five remote I / O modules are connected to the controller (and redundant controller) via interface modules using Profibus-DP communication. Specifically, the controller and redundant controller are connected to the interface modules of the first, second, third, fifth, and sixth remote I / O modules, respectively, via Profibus-DP communication. The redundant controller (i.e., controller 2) is connected to the interface modules of the first, second, third, and fourth remote I / O modules, respectively, via a second DP communication bus. Here, each remote I / O module requires only two communication cables and two power lines to connect to the controller (controller 1) or redundant controller (controller 2). This embodiment also includes a host computer module for controlling the axial compressor unit based on monitoring information from the controller and redundant controller. The host computer module is connected to the controller via a first PN communication line and to the redundant controller via a second PN communication line.

[0045] As a feasible implementation, the redundant controller is connected to the host computer module via Ethernet communication (redundancy). The redundant controller employs hardware redundancy, with the primary and backup controllers connected via synchronous fiber optic cables, offering high communication speed and strong anti-interference capabilities. If the distance between the field and the control room is long, a photoelectric converter can be used to convert the remote I / O electrical signals before transmitting them to the control room via fiber optic cable. In this case, the controller and the redundant controller are connected via synchronous fiber optic cables.

[0046] In this way, the controller of the axial compressor system adopts a hardware redundancy design. The master and backup controllers communicate and synchronize data via fiber optic connection, enabling seamless switching and high reliability. The controller and the host PC use redundant PN communication, which can reduce downtime caused by network failures. At the same time, the five remote I / O modules are connected to the master and backup controllers via DP communication. When the master and slave controllers switch, they can maintain synchronous connection with multiple remote I / O modules, and remote I / O data can be read in real time without interruption or delay; the master-slave switch can be performed without system shutdown.

[0047] It should be noted that the remote IO module of this application is easy to expand within the station. When adding control points in the process later, there is no need to add extra cables between the controller and the remote IO, no need to break ground for construction, and it can be achieved by adjusting the program.

[0048] The axial compressor system supporting distributed control provided in this application combines the characteristics of compressor process layout, and distributes multiple remote IO modules in the corresponding unit plant, equipment platform, and high and low voltage power distribution room. Remote redundant monitoring is performed through the controller, which improves the hardware reliability of the system, reduces the space requirements of the centralized control cabinet, and allows for flexible layout that can be adjusted according to the actual plant layout. It is easy to design and highly adaptable; at the same time, it reduces the failure rate caused by a large number of hard wiring connections.

[0049] Based on the foregoing embodiments, the axial compressor system of this application further includes a first power supply and a second power supply; the first power supply is connected to the controller and is connected to the first power ports of the first remote I / O module, the second remote I / O module, the third remote I / O module, the fifth remote I / O module and the sixth remote I / O module respectively; the second power supply is also connected to the controller and is connected to the second power ports of the first remote I / O module, the second remote I / O module, the third remote I / O module, the fifth remote I / O module and the sixth remote I / O module respectively.

[0050] It should be noted that this application can be used not only in the field of turbine unit control, but also in other industrial sites with high anti-interference requirements, difficult hard wiring installation, strict cost control, and tight schedules.

[0051] In the several embodiments provided in this application, it should be understood that the disclosed systems, modules, and methods can be implemented in other ways. For example, the module embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, or indirect coupling or communication connection between modules or units, and may be electrical, mechanical, or other forms.

[0052] The above diagrams and implementation examples are used to explain the usage and function of the present invention, and are not intended to limit the present invention. Modifications and changes made to the present invention (simply changing the number of remote I / Os, simply changing the distribution or interchange of remote I / Os, expanding the number of I / O group cards, increasing the number of operator stations) within the spirit and scope of the claims of the present invention all fall within the scope of protection of the present invention.

[0053] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. This application is not limited to the exact structures described above and illustrated in the accompanying drawings, and it should not be considered that the specific implementation of this application is limited to these descriptions. For those skilled in the art, various changes and modifications made without departing from the concept of this application should be considered to fall within the protection scope of this application.

Claims

1. A distributed control supported axial compressor system, characterized by, It includes an axial compressor unit, a controller, and several remote I / O modules; wherein, one of the remote I / O modules is respectively set in the shaft system equipment sub-module, auxiliary machine sub-module, process measurement point sub-module, and power distribution module of the axial compressor unit, and the communication interfaces of the several remote I / O modules are simultaneously connected to the controller through a first DP communication bus; The first remote I / O module corresponding to the shaft system equipment submodule is installed within the installation platform of the axial compressor unit and is used to monitor the equipment body measurement points of the main unit of the axial compressor unit; the second remote I / O module corresponding to the auxiliary machine submodule is used to monitor the equipment measurement points of the fan intake and exhaust pipelines, as well as the measurement points of the lubricating oil, power oil system, and water system; the third remote I / O module corresponding to the process measurement point submodule is used to monitor the process pipeline measurement points; the fourth remote I / O module corresponding to the electronic distribution module is installed in the electrical cabinet and is used to monitor the electrical system measurement points of the axial compressor unit. The controller is used to read the field IO signals of the axial compressor unit through each of the remote IO modules, and control the shaft system equipment submodule, auxiliary machine submodule, process measurement point submodule and power distribution module according to the read field IO signals, so as to realize the distributed control of the shaft system equipment submodule, auxiliary machine submodule, process measurement point submodule and power distribution module.

2. An axial compressor system supporting distributed control according to claim 1, characterized in that, The controller includes at least a first rack and a second rack; the first rack includes a first control device, and the second rack includes a second control device; The first control device reads the host field IO signal of the shaft equipment submodule through the first remote IO module, and controls the host based on the read host field IO signal; The second control device reads the matching I / O signals of the auxiliary machine submodule, the process measurement point submodule, and the power distribution module through the second remote I / O module, the third remote I / O module, and the fourth remote I / O module, respectively, and controls the auxiliary machine submodule, the process measurement point submodule, and the power distribution module based on control commands according to the read matching I / O signals.

3. An axial compressor system supporting distributed control according to claim 2, characterized in that, The first remote I / O module is connected to the shaft system instruments of the axial compressor unit and the equipment body within the installation platform via a shielded signal line. The first remote I / O module is used to collect the operating information of the shaft system equipment sub-module and send it to the controller. The controller outputs control commands after logical operation and processing. The control commands are then transmitted to the shaft system equipment sub-module for response via the first remote I / O module.

4. An axial compressor system supporting distributed control according to claim 3, wherein, The monitoring signals for the device body include the vibration signal, displacement signal, and temperature signal of the host. The control points corresponding to the vibration signal, displacement signal, and temperature signal of the host are connected to the terminals corresponding to the first remote IO module through conduits.

5. An axial compressor system supporting distributed control according to claim 1, wherein, The electronic distribution module includes a first high-voltage electronic distribution module and a second low-voltage electronic distribution module. The fifth remote I / O module corresponding to the first high-voltage distribution electronic module is installed in the high-voltage electrical cabinet. The fifth remote I / O module is connected to the electrical alarm signal, circuit breaker status signal, relay protection signal, contact temperature and real-time power signal in the high-voltage electrical cabinet for monitoring. The sixth remote I / O module corresponding to the second low-voltage power distribution module is installed in the low-voltage electrical cabinet. The sixth remote I / O module is connected to the oil pump motor current signal, power signal, opening and closing status signal, gate power distribution status signal, turning gear power distribution status and operation status signal of the low-voltage power distribution system for summary monitoring.

6. An axial compressor system supporting distributed control according to claim 5, wherein, The high-voltage electrical cabinet also includes a circuit breaker, a current transformer, and a protection device. The circuit breaker, the current transformer, and the protection device are respectively connected to the electrical alarm signal, the circuit breaker status signal, the relay protection signal, the contact temperature, and the real-time power signal, and are used to perform protection on the high-voltage electrical cabinet through the controller.

7. An axial compressor system supporting distributed control according to claim 1, wherein, The auxiliary parameters of the process pipeline include, but are not limited to, the signal parameters of pressure transmitters, temperature resistance thermometers, flow meters, differential pressure transmitters, valve limit switches, valve position sensors, and valve electric actuators on each process pipeline.

8. An axial compressor system supporting distributed control according to any one of claims 1 to 7, characterized in that, The system also includes a host computer module, which is connected to the controller via a first PN communication connection line; The host computer module is used to control the axial compressor unit based on the monitoring information of the controller.

9. An axial compressor system supporting distributed control according to claim 8, wherein, The system also includes a redundant controller; The redundant controller is connected to the interface modules of the first remote I / O module, the second remote I / O module, the third remote I / O module and the fourth remote I / O module respectively via the second DP communication bus; The redundant controller is also connected to the host computer module via a second PN communication connection line; The controller and the redundant controller are connected via a synchronous optical fiber.

10. An axial compressor system supporting distributed control according to claim 9, wherein, The system also includes a first power supply and a second power supply; The first power supply is connected to the controller and is also connected to the first power ports of the first remote I / O module, the second remote I / O module, the third remote I / O module, and the fourth remote I / O module, respectively. The second power supply is also connected to the controller and is connected to the second power ports of the first remote I / O module, the second remote I / O module, the third remote I / O module and the fourth remote I / O module respectively.

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