Control method for a gas compression station and control system for a gas compression station

Abstract

The application discloses a kind of control method and gas compression station control system of gas compression station. Including: in the case where target start quantity setting value sent by regulation center is received, the priority of each compressor unit in multiple compressor units is obtained;According to target start quantity setting value and the priority of compressor unit, determine multiple target compressor units;Judge whether multiple preset start conditions of each target compressor unit meet start requirement;In the case where multiple preset start conditions of multiple target compressor units are judged to meet preset start requirement, according to the priority of multiple target compressor units, multiple target compressor units are controlled to start in turn;Multiple target compressor units are controlled to be connected to network by automatic network connection module.The application can adjust unit operation quantity, only need to modify start quantity setting value, can control unit to automatically increase start and stop according to priority, without personnel intervention, realizes the one-key start and stop of gas compression station compressor unit, improves operation efficiency and reduces operation cost.

Description

Technical Field

[0001] This application relates to the field of intelligent control technology for air compressor stations, specifically to a control method and control system for an air compressor station. Background Technology

[0002] In the existing technology, when it is necessary to adjust the number of compressor units operating in an oil and gas station, it needs to be set manually by the operator, and the starting conditions must be judged one by one before issuing an instruction to start them, which results in high operating costs and low efficiency. Summary of the Invention

[0003] The purpose of this application is to provide a control method and control system for a compressor station, in order to solve the problem that the operating cost of the compressor station is high and the efficiency is low when the number of operating units needs to be adjusted in the prior art.

[0004] To achieve the above objectives, the first aspect of this application provides a control method for a compressor station, applied to a compressor station control system communicating with a control center. The compressor station control system includes an automatic grid connection module, and the compressor station includes multiple compressor units. The method includes: Upon receiving the target start-up quantity setting value sent by the control center, obtain the priority of each compressor group among multiple compressor groups; Multiple target compressor groups are determined based on the target start-up quantity setting and the priority of each compressor group; Determine whether the multiple preset start-up conditions of each target compressor unit in the multiple target compressor units meet the start-up requirements; If it is determined that multiple preset start-up conditions of multiple target compressor units meet the preset start-up requirements, the multiple target compressor units are started sequentially according to their priority. Multiple target compressor units are connected to the grid by an automatic grid connection module.

[0005] In this embodiment of the application, obtaining the priority of each compressor group among multiple compressor groups includes: Obtain the operating status and operating time of each compressor unit in multiple compressor units; The priority of each compressor unit in the multiple compressor units is determined based on the operating status and operating time of each compressor unit. The operating status includes operating status, normal shutdown status, pressure holding shutdown status, and pressure relief shutdown status.

[0006] In this embodiment of the application, the compressor station control system communicates with the user terminal, and the method further includes: If any of the preset startup conditions is not met, the corresponding alarm information will be output to the user terminal.

[0007] In this embodiment of the application, the compressor station control system further includes a timing control module, and the method further includes: The timing control module controls multiple devices within multiple target compressor units to start sequentially according to preset logic. The preset logic includes oil pump control logic, automatic switching logic for the main and backup relationship of the lifting oil pump, unit replacement and purging logic, unit start-up and warm-up time logic, and inverter start-up process monitoring logic.

[0008] In this embodiment of the application, the compressor station control system further includes a shutdown unloading model, and the method further includes: During the shutdown process of any compressor unit among multiple target compressor units, acquire the shutdown signal, speed, x-coordinate of the operating point, and x-coordinate of the valve opening line of any compressor unit. The speed control mode of the shutdown unloading model is determined based on the shutdown signal, speed, x-coordinate of the operating point, and x-coordinate of the valve opening line of any compressor unit. The control mode of the anti-surge valve is determined based on the speed control mode of the shutdown unloading model.

[0009] In this embodiment, the compressor station control system further includes a combined control module for a dry gas sealing pneumatic diaphragm valve and a heater, and the method further includes: Under the condition that any compressor unit in multiple target compressor units is in the start-up purging, start-up pressurization and venting stage, obtain the internal pressure and dry gas sealing heating gas temperature of any compressor unit. Based on the internal pressure of any compressor unit, the opening of the pneumatic diaphragm valve is adjusted by the integrated control module of the dry gas sealing pneumatic diaphragm valve and the heater to regulate the sealing gas supply flow rate. Based on the temperature of the dry gas sealing heating gas of any compressor unit, the temperature of the heater is adjusted by the dry gas sealing pneumatic diaphragm valve and the heater integrated control module to regulate the temperature of the dry gas sealing gas.

[0010] In this embodiment of the application, the compressor station control system further includes an automatic start / stop control module for the booster pump, and the method further includes: For any compressor unit among multiple target compressor units, obtain the inlet pressure, outlet pressure, outlet pressure, low-pressure side primary sealing gas flow rate, high-pressure side primary sealing gas flow rate, and the valve position status of the shut-off valve and inlet valve of the dry gas sealing gas pipeline. The low setpoint value of the sealing airflow of any compressor unit is determined based on the inlet pressure of any compressor unit. When the low set value of the sealing gas flow of multiple target compressor units, the first-stage sealing gas flow of the low-pressure side of the unit, the first-stage sealing gas flow of the high-pressure side of the unit, and the valve position status of the shut-off valve and the inlet valve of the dry gas sealing gas pipeline all meet the preset start conditions, the booster pump is controlled to start. When the setpoint for the low setpoint of the unit sealing gas flow of multiple target compressor units, the first-stage sealing gas flow of the unit on the low-pressure side, the first-stage sealing gas flow of the unit on the high-pressure side, the valve position status of the shut-off valve and the inlet valve of the dry gas sealing gas pipeline, the pressure difference between the unit outlet pressure and the unit inlet pressure, and the pressure difference between the unit outlet pressure and the inlet pressure all meet the preset stop conditions, the booster pump is controlled to stop running.

[0011] In this embodiment of the application, the compressor station control system further includes an automatic switching module for hot and cold oil station backup, and the method further includes: Obtain the target instruction; The status of the standby unit is determined according to the target instruction. The status of the standby unit includes cold standby and hot standby. Under the condition that the standby unit is in hot standby status, obtain the cumulative running time of each oil pump in the oil station; The oil pumps are switched between primary and backup pumps based on the cumulative operating time and preset cycle of each pump.

[0012] A second aspect of this application provides a compressor station control system, characterized in that it includes: The memory is configured to store instructions; and The processor is configured to retrieve the instructions from the memory and, when executing the instructions, to implement the control method for the compressor station described above.

[0013] In this embodiment of the application, the processor includes: The automatic grid connection module is configured to control multiple target compressor units to connect to the grid. The timing control module is configured to control the sequential startup of multiple devices within multiple target compressor units; The shutdown unloading model is configured to determine the control mode of the anti-surge valve; The dry gas-tight pneumatic diaphragm valve and heater integrated control module is configured to adjust the opening degree of the pneumatic diaphragm valve and the temperature of the heater; The booster pump automatic start / stop control module is configured to control the start and stop of the booster pump; and The automatic switching module for cold and hot standby at gas stations is configured to control the switching between cold and hot standby at gas stations.

[0014] A third aspect of this application provides a machine-readable storage medium storing instructions for causing a machine to perform the control method for the compressor station described above.

[0015] The above technical solution, upon receiving the target start-up quantity setting value from the control center, obtains the priority of each compressor unit among multiple compressor units. Then, based on the target start-up quantity setting value and the priority of each compressor unit, multiple target compressor units are determined. It then checks whether multiple preset start-up conditions for each target compressor unit meet the start-up requirements. If all preset start-up conditions for multiple target compressor units are met, the multiple target compressor units are started sequentially according to their priorities. Finally, the automatic grid connection module controls the multiple target compressor units to connect to the grid. This application enables automatic start-up and shutdown of units according to priority by simply modifying the start-up quantity setting value when adjusting the number of operating units. The entire process requires no human intervention, achieving one-button start-up and shutdown of compressor units in the compressor station, improving operating efficiency while reducing operating costs.

[0016] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. In the drawings: Figure 1 A flowchart illustrating a control method for a compressor station according to an embodiment of this application is shown schematically. Figure 2 This schematic diagram illustrates a structural block diagram of a compressor station control system according to an embodiment of the present application; Figure 3 The diagram illustrates the structure of a compressor station control system processor according to an embodiment of this application.

[0018] Explanation of reference numerals in the attached figures Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for illustration and explanation of the embodiments of this application and are not intended to limit the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0020] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0021] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0022] Figure 1 A flowchart illustrating a control method for a compressor station according to an embodiment of this application is shown schematically. Figure 1 As shown in the figure, this application provides a control method for a compressor station, which is applied to a compressor station control system that communicates with a control center. The compressor station control system includes an automatic grid connection module, and the compressor station includes multiple compressor units. The method may include the following steps.

[0023] Step 101: Upon receiving the target start-up quantity setting value sent by the control center, obtain the priority of each compressor group among multiple compressor groups; Step 102: Determine multiple target compressor groups based on the target start-up quantity setting and the priority of each compressor group; Step 103: Determine whether the multiple preset start-up conditions of each target compressor unit in the multiple target compressor units meet the start-up requirements; Step 104: If it is determined that the preset start conditions of multiple target compressor units all meet the preset start requirements, control the multiple target compressor units to start sequentially according to their priority. Step 105: Control multiple target compressor units to connect to the grid through the automatic grid connection module.

[0024] In existing technologies, compressor stations include multiple compressor units. When adjusting the number of operating compressor units in an oil and gas station, operators must manually set the parameters and individually determine the starting conditions before issuing commands to start them, resulting in high operating costs and low efficiency. Therefore, this application proposes a control method for compressor stations, applied to a compressor station control system. This compressor station controller system mainly includes an automatic grid connection module, a timing control module, a shutdown unloading model, a comprehensive control module for dry gas sealing pneumatic diaphragm valves and heaters, an automatic start / stop control module for booster pumps, and an automatic switching module for oil station cold / hot standby. When adjusting the number of operating units, the central control system only needs to modify the start-up quantity setting. The compressor station control system of this application can automatically increase, decrease, and stop compressor units according to priority, without human intervention throughout the entire process, achieving one-button start / stop and intelligent operation of the compressor units in the compressor station.

[0025] Specifically, upon receiving the start-up quantity setpoint from the control center, the compressor station controller system can obtain the target start-up quantity and the priority of each compressor unit among multiple compressor units. This target start-up quantity can be set by the operator via the central host computer. Based on the target start-up quantity and the priority of each compressor unit, the system can determine the compressor units that need to be started, i.e., the multiple target compressor units. Specifically, the priority of each compressor unit is determined based on its operating status and operating time. The unit status is divided into four types: operating status, normal shutdown status, pressure holding shutdown status, and pressure relief shutdown status. When the unit has not triggered a pressure holding or pressure relief signal, it is automatically sorted according to its cumulative operating time, corresponding to priorities 1, 2, 3, and 4, with the cumulative operating time increasing from smallest to largest. If the unit triggers a pressure holding or pressure relief signal, its corresponding priority is 0. This determines the priority of each compressor unit, thereby identifying the target compressor units. After the target compressor unit is determined, the compressor station control system automatically scans the start-up conditions and determines whether the multiple preset start-up conditions of each target compressor unit meet the start-up requirements. Only when the multiple preset start-up conditions of the multiple target compressor units are determined to meet the preset start-up requirements will the system control the multiple target compressor units to start up in sequence according to their priority. Finally, the system controls the multiple target compressor units to complete the rapid grid connection through the automatic grid connection module.

[0026] The above technical solution, upon receiving the target start-up quantity setting value sent by the control center, obtains the priority of each compressor unit among multiple compressor units. Then, based on the target start-up quantity and the priority of each compressor unit, multiple target compressor units are determined. It is then determined whether multiple preset start-up conditions for each target compressor unit are met. If all preset start-up conditions for multiple target compressor units are met, the multiple target compressor units are started sequentially according to their priorities. Finally, the automatic grid connection module controls the multiple target compressor units to connect to the grid. This application enables automatic start-up and shutdown of units according to priority when adjusting the number of operating units, requiring only modification of the start-up quantity setting. The entire process requires no human intervention, achieving one-button start-up and shutdown of compressor units in the compressor station, improving operating efficiency while reducing operating costs.

[0027] In this embodiment of the application, obtaining the priority of each compressor group among multiple compressor groups may include: Obtain the operating status and operating time of each compressor unit in multiple compressor units; The priority of each compressor unit in the multiple compressor units is determined based on the operating status and operating time of each compressor unit. The operating status includes operating status, normal shutdown status, pressure holding shutdown status, and pressure relief shutdown status.

[0028] In this embodiment, after receiving the target number of compressor starts, it is necessary to determine the specific compressor units among the multiple compressor units, i.e., the multiple target compressor units, based on the priority of each compressor unit. Specifically, the priority of each compressor unit can be determined based on its operating status and operating time. The unit status is divided into four types: operating status, normal shutdown status, pressure holding shutdown status, and pressure relief shutdown status. When the unit has not triggered a pressure holding or pressure relief signal, it is automatically sorted according to its cumulative operating time, corresponding to priorities 1, 2, 3, and 4, with the cumulative operating time increasing from smallest to largest. If the unit triggers a pressure holding or pressure relief signal, its corresponding priority is 0. This determines the priority of each compressor unit, allowing the compressor station control system to automatically increase or decrease starts according to priority, without human intervention, greatly improving operating efficiency.

[0029] In this embodiment of the application, the method for the compressor station control system to communicate with the user terminal may further include: If any of the preset startup conditions is not met, the corresponding alarm information will be output to the user terminal.

[0030] In this embodiment, the startup conditions may include: normal lubricating oil tank temperature, normal post-isolation gas pressure, fully open compressor anti-surge valve, station control system allowing compressor startup, positive pressure ventilation of the motor in leakage compensation mode, no normal or interlocked shutdown signal for the unit, inverter control mode in remote mode, no over-temperature signal for the dry gas seal heater, no comprehensive fault in the dry gas seal heater, compressor unit speed less than a preset value, oil pump control mode, emergency oil pump control mode, jacking pump control mode, lubricating oil heater control mode, oil-cooled fan control mode, exhaust fan control mode, and main motor heater control mode in remote mode, 10kV circuit breaker of the inverter in open position or 15 minutes after changing from closed to open position (capacitor discharge time), and no faults in the oil pump inverter, emergency oil pump inverter, jacking oil pump inverter, and oil-cooled inverter. When all the above conditions are met simultaneously, the compressor station control system allows the compressor unit to start. The existing logic of compressor station controller systems requires operators to manually determine each start condition before activating the start command, which involves significant manpower and low efficiency. The compressor station control system in this application embodiment can first activate the start command, then automatically scan for start conditions. If any of the preset start conditions is not met, the system outputs a corresponding alarm message to the user terminal to alert the operator for inspection and maintenance.

[0031] In this embodiment of the application, the compressor station control system further includes a timing control module, and the method may further include: The timing control module controls multiple devices within multiple target compressor units to start sequentially according to preset logic. The preset logic includes oil pump control logic, automatic switching logic for the main and backup relationship of the lifting oil pump, unit replacement and purging logic, unit start-up and warm-up time logic, and inverter start-up process monitoring logic.

[0032] The compressor station control system in this embodiment further includes a timing control module, which is used to control the startup sequence of multiple devices within the compressor unit. In this embodiment, in addition to automatically determining startup conditions, the startup sequence of multiple devices within the compressor unit is optimized by writing timing control logic into the timing control module so that the timing control module controls the devices to start according to preset logic. The preset logic includes oil pump control logic, automatic switching logic for the main / standby relationship of the lifting oil pump, unit replacement and purging logic, unit startup warm-up time logic, and inverter startup process monitoring logic.

[0033] In this embodiment, the execution timing of "opening the dry gas seal inlet valve" is adjusted to before purging and replacement to increase the effective working time of the pneumatic diaphragm regulating valve, reduce valve throttling time, avoid equipment freezing and blockage, and ensure the normal operation of the dry gas seal system. The oil pump control logic includes emergency oil pump test logic and standby jacking oil pump test logic to verify the integrity of the oil pump and ensure stable unit operation. The addition of automatic switching logic for the jacking oil pump master-slave relationship solves the problem of long-term single operation of the master jacking oil pump. The unit replacement purging logic changes the original single continuous purging of 120 seconds to a three-stage purging of the casing, anti-surge valve pipeline, and outlet pipeline to solve the problem of incomplete and insufficient unit replacement and improve system safety. The unit start-up warm-up time logic sets the unit to restart within 2 hours of shutdown, reducing the warm-up time from 40 minutes to 20 minutes. Adding inverter start-up process monitoring logic facilitates operator monitoring of inverter operation during startup.

[0034] In this embodiment of the application, the compressor station control system further includes a shutdown unloading model, and the method may further include: During the shutdown process of any compressor unit among multiple target compressor units, acquire the shutdown signal, speed, x-coordinate of the operating point, and x-coordinate of the valve opening line of any compressor unit. The speed control mode of the shutdown unloading model is determined based on the shutdown signal, speed, x-coordinate of the operating point, and x-coordinate of the valve opening line of any compressor unit. The control mode of the anti-surge valve is determined based on the speed control mode of the shutdown unloading model.

[0035] The compressor station control system in this application embodiment also includes a shutdown unloading model to address the mismatch between anti-surge control and speed control during high-speed compressor shutdown, as well as the problem of the unit entering the surge zone. Specifically, the normal shutdown unloading model speed control mode can be defined as four types: 1, 2, 3, and 4. During the shutdown process of any compressor unit among multiple target compressor units, the system acquires the compressor unit's shutdown signal, speed, operating point abscissa, and valve opening line abscissa in real time. Based on the compressor unit's shutdown signal, speed, operating point abscissa, and valve opening line abscissa, the speed control mode of the shutdown unloading model can be determined. If the normal shutdown unloading model speed control mode is 1, the anti-surge valve control mode is set to semi-automatic mode, and the anti-surge valve opens by 30%. If the normal shutdown unloading model speed control mode is 2, the anti-surge valve control mode is set to semi-automatic mode, and the anti-surge valve opens by 1% per second. If the normal shutdown unloading model speed control mode is 3, the unit decelerates at 1.8 r / s. If the normal shutdown unloading model speed control mode is 4, the anti-surge valve control mode is set to semi-automatic mode, and the anti-surge valve is fully open. During the deceleration process, the speed is first controlled by the UCP (unit control panel) to the minimum operating speed, and then the speed is controlled by the frequency converter. A CAL valve opening line and a CAH speed reduction line are added to the anti-surge control curve. When the unit receives a normal shutdown command, the shutdown unloading model is executed. When the operating point moves left and touches the CAL line, the unit stops decelerating, and the anti-surge valve adjusts the flow rate according to the preset logic. When the operating point moves right and touches the CAH line, the anti-surge valve stops operating, and the unit decelerates. This solves the problem of mismatched control between anti-surge control and speed control during high-speed shutdown, and the problem of the unit entering the surge zone.

[0036] In this embodiment, the compressor station control system further includes a combined control module for a dry gas sealing pneumatic diaphragm valve and a heater, and the method may further include: Under the condition that any compressor unit in multiple target compressor units is in the start-up purging, start-up pressurization and venting stage, obtain the internal pressure and dry gas sealing heating gas temperature of any compressor unit. Based on the internal pressure of any compressor unit, the opening of the pneumatic diaphragm valve is adjusted by the integrated control module of the dry gas sealing pneumatic diaphragm valve and the heater to regulate the sealing gas supply flow rate. Based on the temperature of the dry gas sealing heating gas of any compressor unit, the temperature of the heater is adjusted by the dry gas sealing pneumatic diaphragm valve and the heater integrated control module to regulate the temperature of the dry gas sealing gas.

[0037] The compressor station control system in this embodiment also includes a comprehensive control module for a dry gas sealing pneumatic diaphragm valve and heater. This module enables the pneumatic diaphragm valve and heater to automatically adjust according to preset logic during start-up purging, pressurization, and venting. Specifically, the module adjusts the temperature of the dry gas sealing pneumatic diaphragm valve and heater to control the flow rate of the sealing gas and the temperature of the dry gas sealing gas. Purging and pressurization are two stages during start-up, while venting is a stage after shutdown. Specifically, when any compressor unit among multiple target compressor units is in the start-up purging, start-up pressurization, or venting stage, the internal pressure of the compressor and the temperature of the dry gas sealing gas in the compressor unit are acquired in real time. Then, based on the internal pressure of the compressor, the module adjusts the opening of the pneumatic diaphragm valve to regulate the flow rate of the sealing gas; and based on the temperature of the dry gas sealing gas in any compressor unit, the module adjusts the temperature of the heater to regulate the temperature of the dry gas sealing gas. The heater temperature is controlled using a combination of step and PID controllers based on parameters such as proportional, integral, derivative, and sealing gas temperature. This solves the problems of unstable sealing gas supply flow and frequent heater overheating during the pressurization and venting phases.

[0038] In this embodiment of the application, the compressor station control system further includes an automatic start / stop control module for the booster pump, and the method may further include: For any compressor unit among multiple target compressor units, obtain the inlet pressure, outlet pressure, outlet pressure, low-pressure side primary sealing gas flow rate, high-pressure side primary sealing gas flow rate, and the valve position status of the shut-off valve and inlet valve of the dry gas sealing gas pipeline. The low setpoint value of the sealing airflow of any compressor unit is determined based on the inlet pressure of any compressor unit. When the low set value of the sealing gas flow of multiple target compressor units, the first-stage sealing gas flow of the low-pressure side of the unit, the first-stage sealing gas flow of the high-pressure side of the unit, and the valve position status of the shut-off valve and the inlet valve of the dry gas sealing gas pipeline all meet the preset start conditions, the booster pump is controlled to start. When the setpoint for the low setpoint of the unit sealing gas flow of multiple target compressor units, the first-stage sealing gas flow of the unit on the low-pressure side, the first-stage sealing gas flow of the unit on the high-pressure side, the valve position status of the shut-off valve and the inlet valve of the dry gas sealing gas pipeline, the pressure difference between the unit outlet pressure and the unit inlet pressure, and the pressure difference between the unit outlet pressure and the inlet pressure all meet the preset stop conditions, the booster pump is controlled to stop running.

[0039] The compressor station control system in this embodiment also includes an automatic start / stop control module for booster pumps. In practical applications, a compressor station typically has three booster pumps, with multiple compressor units sharing these three pumps. The time-sharing function of the automatic start / stop control module allows for shared use of the booster pumps. Furthermore, the three booster pumps can automatically switch based on operating time, balancing operating hours and improving equipment reliability. Specifically, since the start / stop of the booster pumps is related to parameters such as the dry gas seal supply flow rate, the pressure difference between the unit's outlet and inlet pressures, and the pressure difference between the unit's outlet and inlet pressures, the compressor station control system in this embodiment acquires the compressor unit's inlet pressure, outlet pressure, outlet pressure, low-pressure side primary seal gas flow rate, high-pressure side primary seal gas flow rate, and the valve position status of the shut-off valve and inlet valve in the dry gas seal gas pipeline in real time. The low setpoint value for the seal gas flow rate of any compressor unit is determined based on the compressor unit's inlet pressure.

[0040] In one example, for the target compressor unit, if the inlet pressure of Unit 1 is ≤1MPa, the low setpoint for the sealing gas flow rate of Unit 1 is 150 NM3 / h; if 1MPa < Unit 1 inlet pressure ≤5MPa, the low setpoint for the sealing gas flow rate of Unit 1 is 250 NM3 / h; if the inlet pressure of Unit 1 is >5MPa, the low setpoint for the sealing gas flow rate of Unit 1 is 320 NM3 / h. If the primary sealing gas flow rate on the low-pressure side of Unit 1 is ≤1 or the primary sealing gas flow rate on the high-pressure side of Unit 1 is ≤1, then the condition for starting the booster pump of Unit 1 is deemed met. Similarly, the condition for starting the booster pump can be determined for other target compressor units. If all target compressor units meet the condition for starting the booster pump, the booster pump will automatically start / stop. Likewise, if all target compressor units meet the condition for stopping the booster pump, the booster pump will automatically stop.

[0041] In this embodiment of the application, the compressor station control system further includes an automatic switching module for hot and cold oil station backup, and the method may further include: Obtain the target instruction; The status of the standby unit is determined according to the target instruction. The status of the standby unit includes cold standby and hot standby. Under the condition that the standby unit is in hot standby status, obtain the cumulative running time of each oil pump in the oil station; The oil pumps are switched between primary and backup pumps based on the cumulative operating time and preset cycle of each pump.

[0042] The compressor station control system in this embodiment also includes an automatic switching module for hot and cold standby oil pumps. Each unit's oil pump station includes three oil pumps: Pump A, Pump B, and an emergency oil pump. After the compressor unit stops operating, the oil pumps can be in two states: hot standby and cold standby. When the oil pump stops operating, it is in cold standby mode; if it continues operating, it is in hot standby mode. The system can determine whether the oil pump is in cold or hot standby mode based on the target command. Typically, during pressurization and gas transmission tasks, the oil pump is controlled to be in hot standby mode. Pumps A and B can automatically switch their master / standby relationship. After determining the cold or hot standby state, the system obtains the cumulative operating time of each oil pump in the oil station and controls the automatic switching of the master / standby relationship between Pumps A and B according to a preset cycle based on the cumulative operating time of each oil pump. In practical applications, the automatic switching of the master / standby relationship between Pumps A and B is typically controlled on a 7-day cycle. The automatic switching module for hot and cold standby oil pumps enables one-click hot and cold standby, reducing human intervention and the risk of misoperation, and improving work efficiency. Meanwhile, in hot standby mode, the oil pumps can be automatically switched according to the running time, which balances the oil pump running time and improves the reliability of the equipment.

[0043] Figure 2 A schematic block diagram of a compressor station control system according to an embodiment of this application is shown. Figure 2 As shown in the figure, this application provides a compressor station control system, which may include: Memory 210 is configured to store instructions; and The processor 220 is configured to retrieve instructions from the memory 210 and, when executing the instructions, to implement the aforementioned control method for the compressor station.

[0044] Specifically, in this embodiment of the application, the processor 220 can be configured to: Upon receiving the target start-up quantity setting value sent by the control center, obtain the priority of each compressor group among multiple compressor groups; Multiple target compressor groups are determined based on the target number of start-ups and the priority of each compressor group; Determine whether the multiple preset start-up conditions of each target compressor unit in the multiple target compressor units meet the start-up requirements; If it is determined that multiple preset start-up conditions of multiple target compressor units meet the preset start-up requirements, the multiple target compressor units are started sequentially according to their priority. Multiple target compressor units are connected to the grid by an automatic grid connection module.

[0045] In this embodiment of the application, the processor 220 can also be configured to: Obtain the operating status and operating time of each compressor unit in multiple compressor units; The priority of each compressor unit in the multiple compressor units is determined based on the operating status and operating time of each compressor unit. The operating status includes operating status, normal shutdown status, pressure holding shutdown status, and pressure relief shutdown status.

[0046] In this embodiment of the application, the processor 220 can also be configured to: If any of the preset startup conditions is not met, the corresponding alarm information will be output to the user terminal.

[0047] In this embodiment of the application, the processor 220 can also be configured to: The timing control module controls multiple devices within multiple target compressor units to start sequentially according to preset logic. The preset logic includes oil pump control logic, automatic switching logic for the main and backup relationship of the lifting oil pump, unit replacement and purging logic, unit start-up and warm-up time logic, and inverter start-up process monitoring logic.

[0048] In this embodiment of the application, the processor 220 can also be configured to: During the shutdown process of any compressor unit among multiple target compressor units, acquire the shutdown signal, speed, x-coordinate of the operating point, and x-coordinate of the valve opening line of any compressor unit. The speed control mode of the shutdown unloading model is determined based on the shutdown signal, speed, x-coordinate of the operating point, and x-coordinate of the valve opening line of any compressor unit. The control mode of the anti-surge valve is determined based on the speed control mode of the shutdown unloading model.

[0049] In this embodiment of the application, the processor 220 can also be configured to: Under the condition that any compressor unit in multiple target compressor units is in the start-up purging, start-up pressurization and venting stage, obtain the internal pressure and dry gas sealing heating gas temperature of any compressor unit. Based on the internal pressure of any compressor unit, the opening of the pneumatic diaphragm valve is adjusted by the integrated control module of the dry gas sealing pneumatic diaphragm valve and the heater to regulate the sealing gas supply flow rate. Based on the temperature of the dry gas sealing heating gas of any compressor unit, the temperature of the heater is adjusted by the dry gas sealing pneumatic diaphragm valve and the heater integrated control module to regulate the temperature of the dry gas sealing gas.

[0050] In this embodiment of the application, the processor 220 can also be configured to: For any compressor unit among multiple target compressor units, obtain the inlet pressure, outlet pressure, outlet pressure, low-pressure side primary sealing gas flow rate, high-pressure side primary sealing gas flow rate, and the valve position status of the shut-off valve and inlet valve of the dry gas sealing gas pipeline. The low setpoint value of the sealing airflow of any compressor unit is determined based on the inlet pressure of any compressor unit. When the low set value of the sealing gas flow of multiple target compressor units, the first-stage sealing gas flow of the low-pressure side of the unit, the first-stage sealing gas flow of the high-pressure side of the unit, and the valve position status of the shut-off valve and the inlet valve of the dry gas sealing gas pipeline all meet the preset start conditions, the booster pump is controlled to start. When the setpoint for the low setpoint of the unit sealing gas flow of multiple target compressor units, the first-stage sealing gas flow of the unit on the low-pressure side, the first-stage sealing gas flow of the unit on the high-pressure side, the valve position status of the shut-off valve and the inlet valve of the dry gas sealing gas pipeline, the pressure difference between the unit outlet pressure and the unit inlet pressure, and the pressure difference between the unit outlet pressure and the inlet pressure all meet the preset stop conditions, the booster pump is controlled to stop running.

[0051] In this embodiment of the application, the processor 220 can also be configured to: Obtain the target instruction; The status of the standby unit is determined according to the target instruction. The status of the standby unit includes cold standby and hot standby. Under the condition that the standby unit is in hot standby status, obtain the cumulative running time of each oil pump in the oil station; The oil pumps are switched between primary and backup pumps based on the cumulative operating time and preset cycle of each pump.

[0052] The above technical solution, upon receiving the target start-up quantity setting value from the control center, obtains the priority of each compressor unit among multiple compressor units. Then, based on the target start-up quantity and the priority of each compressor unit, multiple target compressor units are determined. Each target compressor unit's preset start-up conditions are checked to ensure they meet the start-up requirements. If all preset start-up conditions are met, the multiple target compressor units are started sequentially according to their priorities. Finally, the automatic grid connection module controls the multiple target compressor units to connect to the grid. This application allows for automatic start-up and shutdown of units according to priority simply by modifying the start-up quantity setting value when adjusting the number of operating units. The entire process requires no human intervention, achieving one-button start-up and shutdown of compressor units in the compressor station, improving operating efficiency while reducing operating costs.

[0053] Figure 3 This diagram schematically illustrates the structure of a compressor station control system processor according to an embodiment of this application. Figure 3As shown in this embodiment, the compressor station control system processor may include: The automatic grid connection module 310 is configured to control multiple target compressor units to connect to the grid. The timing control module 320 is configured to control the sequential start-up of multiple devices within multiple target compressor units; The shutdown and unloading model 330 is configured to determine the control mode of the anti-surge valve; The dry gas-tight pneumatic diaphragm valve and heater integrated control module 340 is configured to adjust the opening degree of the pneumatic diaphragm valve and the temperature of the heater. The booster pump automatic start / stop control module 350 is configured to control the start and stop of the booster pump; and The 360 ​​automatic switching module for hot and cold standby at gas stations is configured to control the switching between hot and cold standby at gas stations.

[0054] In this embodiment, the compressor station control system processor mainly includes an automatic grid connection module 310, a timing control module 320, a shutdown unloading model 330, a dry gas sealing pneumatic diaphragm valve and heater integrated control module 340, a booster pump automatic start / stop control module 350, and an oil station cold / hot standby automatic switching module 360. Among them, the automatic grid connection module 310 can control multiple target compressor units to complete rapid grid connection; the timing control module 320 is used to control multiple devices inside the compressor unit to start in sequence; the shutdown unloading model 330 is used to determine the control mode of the anti-surge valve to solve the problem of mismatch between anti-surge control and speed control during high-speed shutdown of the compressor and the problem of the unit entering the surge zone; the dry gas sealing pneumatic diaphragm valve and heater integrated control module 340 can adjust the valve opening and heater temperature according to preset logic during start-up purging, pressurization and venting, to solve the problems of unstable sealing gas supply flow and frequent heater overheating during pressurization and venting; the booster pump automatic start-stop control module 350 can realize automatic switching based on the running time of the three booster pumps, balance the running time and improve the reliability of the equipment; the oil station cold and hot standby automatic switching module 360 ​​is used to control the oil pump to automatically switch based on the running time in hot standby state, balance the oil pump running time and improve the reliability of the equipment.

[0055] This application also provides a machine-readable storage medium storing instructions that cause a machine to execute the above-described control method for a compressor station.

[0056] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0057] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0058] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0059] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0060] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0061] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0062] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0063] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0064] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A control method for a compressor station, characterized in that, A compressor station control system for communicating with a control center, the compressor station control system including an automatic grid connection module, the compressor station including multiple compressor units, the method comprising: Upon receiving the target start-up quantity setting value sent by the control center, the priority of each compressor group among the multiple compressor groups is obtained; Multiple target compressor groups are determined based on the target start-up quantity setting and the priority of each compressor group; Determine whether the multiple preset start-up conditions of each of the multiple target compressor groups meet the start-up requirements; If it is determined that all preset start-up conditions of the multiple target compressor units meet the start-up requirements, the multiple target compressor units are started sequentially according to their priority. The automatic grid connection module controls the multiple target compressor units to connect to the grid. The compressor station control system further includes an automatic start / stop control module for the booster pump. The method further includes: for any compressor unit among the plurality of target compressor units, acquiring the inlet pressure, outlet pressure, outlet pressure, low-pressure side primary sealing gas flow rate, high-pressure side primary sealing gas flow rate, and the valve position status of the shut-off valve and inlet valve of the dry gas sealing gas pipeline; determining the low set value of the sealing gas flow rate of the arbitrary compressor unit based on its inlet pressure; and determining the low set value of the sealing gas flow rate of the plurality of target compressor units and the valve position status of the dry gas sealing gas pipeline. When the sealing gas flow rate, the primary sealing gas flow rate on the high-pressure side of the unit, and the valve positions of the shut-off valve and inlet valve of the dry gas sealing gas pipeline all meet the preset start-up conditions, the booster pump is controlled to start. When the low set value of the sealing gas flow rate of the multiple target compressor units, the primary sealing gas flow rate on the low-pressure side of the unit, the primary sealing gas flow rate on the high-pressure side of the unit, the valve positions of the shut-off valve and inlet valve of the dry gas sealing gas pipeline, the pressure difference between the unit outlet pressure and the unit inlet pressure, and the pressure difference between the unit outlet pressure and the inlet pressure all meet the preset stop conditions, the booster pump is controlled to stop running.

2. The control method according to claim 1, characterized in that, Obtaining the priority of each compressor group among the plurality of compressor groups includes: Obtain the unit status and operating time of each compressor unit in the plurality of compressor units; The priority of each compressor group is determined based on the unit status and operating time of each compressor group in the plurality of compressor groups; The unit status includes operating status, normal shutdown status, pressure holding shutdown status, and pressure relief shutdown status.

3. The control method according to claim 1, characterized in that, The compressor station control system communicates with the user terminal, and the method further includes: If any of the preset startup conditions fails to meet the startup requirements, the corresponding alarm information will be output to the user terminal.

4. The control method according to claim 1, characterized in that, The compressor station control system further includes a timing control module, and the method further includes: The timing control module controls multiple devices within the multiple target compressor units to start sequentially according to a preset logic. The preset logic includes oil pump control logic, automatic switching logic for the main and backup relationship of the lifting oil pump, unit replacement and purging logic, unit start-up and warm-up time logic, and inverter start-up process monitoring logic.

5. The control method according to claim 1, characterized in that, The compressor station control system also includes a shutdown and unloading model, and the method further includes: During the shutdown process of any compressor unit among the multiple target compressor units, the shutdown signal, speed, horizontal coordinate of the operating point, and horizontal coordinate of the valve opening line of the arbitrary compressor unit are acquired. The speed control mode of the shutdown unloading model is determined based on the shutdown signal, speed, horizontal coordinate of the operating point, and horizontal coordinate of the valve opening line of the arbitrary compressor unit. The control mode of the anti-surge valve is determined based on the speed control mode of the shutdown unloading model.

6. The control method according to claim 1, characterized in that, The compressor station control system also includes a comprehensive control module for a dry gas sealing pneumatic diaphragm valve and a heater, and the method further includes: When any compressor unit among the plurality of target compressor units is in the start-up purging, start-up pressurization and venting stage, the internal pressure and dry gas sealing heating gas temperature of the arbitrary compressor unit are obtained. Based on the internal pressure of any compressor unit, the opening of the pneumatic diaphragm valve is adjusted by the integrated control module of the dry gas sealing pneumatic diaphragm valve and the heater to regulate the sealing gas supply flow rate. Based on the temperature of the dry gas sealing heating gas of any compressor unit, the temperature of the heater is adjusted by the integrated control module of the dry gas sealing pneumatic diaphragm valve and the heater to regulate the temperature of the dry gas sealing gas.

7. The control method according to claim 1, characterized in that, The compressor station control system also includes an automatic switching module for hot and cold oil station backup, and the method further includes: Obtain the target instruction; The status of the standby unit is determined according to the target instruction, and the status of the standby unit includes cold standby and hot standby; If the standby unit is determined to be in hot standby mode, the cumulative operating time of each oil pump in the oil station is obtained. The oil pumps are switched between primary and backup pumps based on the cumulative operating time and preset cycle of each pump.

8. A compressor station control system, characterized in that, include: The memory is configured to store instructions; as well as The processor is configured to retrieve the instructions from the memory and, when executing the instructions, to implement the control method of the compressor station according to any one of claims 1 to 7.

9. The compressor station control system according to claim 8, characterized in that, The processor includes: The automatic grid connection module is configured to control multiple target compressor units to connect to the grid. The timing control module is configured to control the sequential startup of multiple devices within multiple target compressor units; The shutdown unloading model is configured to determine the control mode of the anti-surge valve; The dry gas-tight pneumatic diaphragm valve and heater integrated control module is configured to adjust the opening degree of the pneumatic diaphragm valve and the temperature of the heater; The booster pump automatic start / stop control module is configured to control the start and stop of the booster pump; and The automatic switching module for cold and hot standby at gas stations is configured to control the switching between cold and hot standby at gas stations.

10. A machine-readable storage medium, characterized in that, The machine-readable storage medium stores instructions for causing the machine to perform the control method of the compressor station according to any one of claims 1 to 7.

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