Methods, devices, electronic equipment and storage media for blower surge protection

Abstract

This application relates to a method, device, equipment, and storage medium for preventing surge in blowers. The method, implemented using a PLC controller, includes: acquiring operating reference data of the blower; determining the blower's operating point based on the operating reference data; when the blower's operating point is between a set adjustment line and a set vent line, controlling the opening of the blower's anti-surge valve via PID control, with the adjustment range increasing as the distance between the operating point and the adjustment line increases; when the blower's operating point crosses the vent line, adjusting the anti-surge valve to fully open; and when the blower's operating point is between a set alarm line and a set adjustment line, outputting an operating point reminder message. The operating reference data includes throat difference and exhaust pressure, with the adjustment line and vent line generated from surge test data, using throat difference as the horizontal axis and exhaust pressure as the vertical axis. This eliminates the safety hazards of blower operation caused by the failure of the original TURBOLOG controller and improves operational reliability.

Description

Technical Field

[0001] This application relates to the field of blower technology, and in particular to a blower anti-surge protection method, device, electronic equipment and storage medium. Background Technology

[0002] Blowers are an indispensable and crucial component in blast furnace production, and ensuring their safe and stable operation is a fundamental condition for smooth blast furnace production. Currently, the most widely used method for anti-surge control of axial flow blowers is the TURBOLOG controller. However, due to the lack of readily available spare parts for TURBOLOG controllers, their high price, and long procurement cycles, it is difficult to quickly restore blower operation when the TURBOLOG controller malfunctions, resulting in low operational reliability. Summary of the Invention

[0003] Therefore, it is necessary to provide a method, device, equipment, and storage medium for blower anti-surge protection that can improve operational reliability in response to the above problems.

[0004] A blower anti-surge protection method, implemented based on a PLC controller, includes:

[0005] Obtain the operating reference data of the blower, and determine the operating point of the blower based on the operating reference data;

[0006] When the operating point of the blower is between the set adjustment line and the set venting line, the opening of the anti-surge valve of the blower is controlled by PID regulation, and the adjustment range increases as the distance between the operating point and the adjustment line increases.

[0007] When the operating point of the blower exceeds the vent line, the opening of the anti-surge valve is adjusted to be fully open;

[0008] When the operating point of the blower is between the set alarm line and the set adjustment line, an operating point reminder message is output;

[0009] The operating reference data includes throat difference and exhaust pressure. The adjustment line and the vent line are generated from surge test data with throat difference as the horizontal axis and exhaust pressure as the vertical axis. The area below the adjustment line is the safe operating area of ​​the blower, the area between the adjustment line and the vent line is the adjustment area of ​​the blower, and the area above the vent line is the surge venting area of ​​the blower.

[0010] In one embodiment, the operating reference data further includes the motor operating status and speed; determining the operating point of the blower based on the operating reference data includes:

[0011] Based on the motor's operating status and speed, it is determined that the blower's motor is in operation and its speed is greater than a set speed threshold. Then, the operating point of the blower is determined based on the throat difference and the exhaust pressure.

[0012] In one embodiment, when the operating point of the blower is between the regulating line and the venting line, the proportional coefficient P of the PID control is:

[0013] P = P1 + Px × (Y - Y1) / (Y2 - Y1)

[0014] Px = 271.6 / (Y2-Y1) - 1.8

[0015] Where P1 is a fixed value and Px is a variable value; Y is the exhaust pressure value at the operating point, and Y1 and Y2 are the ordinate values ​​of the adjustment line and vent line corresponding to the operating point, respectively.

[0016] In one embodiment, controlling the opening of the anti-surge valve of the blower by PID regulation includes: when increasing the opening of the anti-surge valve by PID regulation, increasing it to the target opening within a unit cycle; when decreasing the opening of the anti-surge valve by PID regulation, adjusting the opening by decreasing it by a fixed amount per unit cycle.

[0017] In one embodiment, when the operating point of the blower is between the set adjustment line and the set venting line, the method further includes: locking the manual shut-off function of the anti-surge valve.

[0018] When the operating point of the blower crosses the vent line, adjusting the opening of the anti-surge valve to be fully open includes: switching to the manual adjustment state of the anti-surge valve so as to manually adjust the opening of the anti-surge valve to be fully open.

[0019] In one embodiment, after obtaining the operating reference data of the blower, the method further includes:

[0020] If at least two of the obtained throat differences are less than the set threshold, then a backflow phenomenon is determined to have occurred.

[0021] An alarm message is output after the backflow phenomenon continues for a preset alarm duration threshold.

[0022] After the backflow phenomenon continues for a preset shutdown duration threshold, the blower unit is controlled to shut down interlocked; wherein, the shutdown duration threshold is greater than the alarm duration threshold.

[0023] In one embodiment, the output of the operating condition reminder information includes: providing an operating condition reminder by controlling at least one of the following: displaying information on a screen, illuminating an indicator light, and emitting sound from a speaker.

[0024] A blower anti-surge protection device, implemented based on a PLC controller, includes:

[0025] The operating point analysis module is used to obtain the operating reference data of the blower and determine the operating point of the blower based on the operating reference data.

[0026] The opening adjustment module is used to control the opening of the anti-surge valve of the blower through PID regulation when the operating point of the blower is between the set adjustment line and the set vent line, and the adjustment range increases as the distance between the operating point and the adjustment line increases; when the operating point of the blower crosses the vent line, the opening of the anti-surge valve is adjusted to be fully open; when the operating point of the blower is between the set alarm line and the set adjustment line, an operating point reminder message is output.

[0027] The operating reference data includes throat difference and exhaust pressure. The adjustment line and the vent line are generated from surge test data with throat difference as the horizontal axis and exhaust pressure as the vertical axis. The area below the adjustment line is the safe operating area of ​​the blower, the area between the adjustment line and the vent line is the adjustment area of ​​the blower, and the area above the vent line is the surge venting area of ​​the blower.

[0028] An electronic device includes a memory and a processor, the memory storing a computer program, the processor executing the computer program to implement the steps of the method described above.

[0029] A computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the method described above.

[0030] The aforementioned blower anti-surge protection method, device, electronic equipment, and storage medium acquire blower operating reference data through a PLC controller to determine the blower's operating point. Based on the relationship between the blower's operating point and the regulating and venting lines, the opening of the blower's anti-surge valve is controlled accordingly. This provides a replacement for the TURBOLOG controller, eliminating various safety hazards that could affect the smooth operation of the blower caused by the original TURBOLOG controller's failure, and improving operational reliability. Attached Figure Description

[0031] Figure 1 This is a flowchart of a blower anti-surge protection method in one embodiment;

[0032] Figure 2 This is a diagram showing the anti-surge operating conditions of the blower in one embodiment;

[0033] Figure 3 A flowchart of a blower anti-surge protection method in another embodiment;

[0034] Figure 4 This is a schematic diagram of the blower's wire-collision test results in one embodiment;

[0035] Figure 5 This is a structural block diagram of a blower anti-surge protection device in one embodiment;

[0036] Figure 6 This is a schematic diagram of the structure of an electronic device in one embodiment. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0038] In one embodiment, such as Figure 1 As shown, a blower surge protection method is provided, implemented based on a PLC (Programmable Logic Controller). This method is simple to program, cost-effective, has complete hardware support, is easy to use, and possesses strong adaptability and anti-interference capabilities. It is also easy to maintain, making it suitable for replacing TURBOLOG controllers with logic programming to achieve blower surge protection and ensure that process air supply requirements are not affected. The method includes:

[0039] Step S110: Obtain the blower's operating reference data and determine the blower's operating point based on the operating reference data. The type of operating reference data is not unique and may include parameters such as throat differential pressure, exhaust pressure, inlet temperature, anti-surge valve feedback, and throat differential pressure switch. Specific settings can be configured according to actual needs. The blower's operating reference data is preprocessed accordingly, and then the blower's operating point is determined based on the preprocessed parameters. It is understandable that the signal preprocessing method may vary depending on the parameter type. Specifically, taking operating reference data including throat differential pressure and exhaust pressure as an example, temperature and pressure compensation can be applied to the throat differential pressure and exhaust pressure, and then the blower's operating point can be determined based on the processed throat differential pressure and exhaust pressure.

[0040] Step S120: When the blower's operating point is between the set regulating line and the set venting line, the opening of the blower's anti-surge valve is controlled by PID (Proportion Integration Differentiation) adjustment, and the adjustment range increases as the distance between the operating point and the regulating line increases. The regulating line and the venting line are generated from surge test data, with throat difference as the horizontal axis and exhaust pressure as the vertical axis. The area below the regulating line is the blower's safe operating zone, the area between the regulating line and the venting line is the blower's regulating zone, and the area above the venting line is the blower's surge and venting zone. The regulating line and venting line used in the blower's anti-surge protection of the PLC controller can be adjusted based on the regulating line and venting line used in the anti-surge protection of the TURBOLOG controller.

[0041] Specifically, such as Figure 2 The diagram shows the anti-surge operating points of the blower. The horizontal axis represents the throat difference after treatment, and the vertical axis represents the exhaust pressure after treatment. Below the regulating line is the safe operating zone; under normal circumstances, the operating point operates within this zone. Above the regulating line and below the vent line is the regulating zone. Within this zone, the unit adjusts the opening of the anti-surge valve to avoid entering a surge state. Above the vent line is the surge venting zone, indicating that the unit is about to enter a surge state, a very critical situation, requiring the anti-surge valve to be fully opened immediately. When the operating point approaches or even crosses the regulating line, the anti-surge valve opens at a certain angle, pulling the operating point back to near the regulating line. When the unit's operating point is abnormal or crosses the vent line, the unit immediately enters a safe operating state, the anti-surge valve is fully opened, the stator vanes slowly close and lock, immediately pulling the operating point back to the safe zone to avoid entering a surge state.

[0042] Considering that the PLC controller's processing response speed is slightly slower than the TURBOLOG controller, and that there will be some error in using the Bode energy map pixels on the HMI (Human Machine Interface) screen to deduce surge point data, to ensure timely system response, this paper studies the basic control logic of the TURBOLOG controller and shifts the adjustment and venting lines used in the TURBOLOG controller's anti-surge mechanism down by a set percentage, for example, about 1%, along the vertical axis. The new points are then drawn as adjustment and venting lines suitable for the PLC controller's anti-surge protection. After the PLC controller obtains the blower's operating reference data, it performs operating point analysis and anti-surge protection adjustments based on the newly drawn adjustment and venting lines, achieving seamless integration between controller protection and PLC logic protection.

[0043] Under normal circumstances, the blower operates within a safe range. When the blower's operating point is between the set regulating line and the set venting line, the opening of the blower's anti-surge valve is controlled by PID regulation. The more the operating point deviates from the regulating line and the closer it is to the venting line (red line), the larger the opening of the anti-surge valve and the faster the response speed, in order to quickly pull the operating point back below the regulating line. Because the blower experiences extremely rapid changes in operating conditions, according to the calculation and output principle of PID, proportional regulation plays a dominant role at this moment. Therefore, the focus of the control output is on the selection of the P value (proportional coefficient), and the integral time can be set to a fixed value, such as 12 seconds. When the operating point is below the regulating line, a P value of 0.1 is used; when the operating point is between the regulating line and the venting line, a variable P value is used for control. In one embodiment, when the blower's operating point is between the regulating line and the venting line, the proportional coefficient P value of the PID regulation is:

[0044] P = P1 + Px × (Y - Y1) / (Y2 - Y1)

[0045] Where P1 is a fixed value that can be set according to actual needs, such as by combining experimental data; Px is a variable value; Y is the exhaust pressure value at the operating point; and Y1 and Y2 are the ordinate values ​​of the adjustment line and vent line corresponding to the operating point, respectively. The principle for determining the variable value Px is that the closer the operating point is to the vent line (i.e., the farther it is from the adjustment line), the larger the P value, the faster the response, and the larger the opening. Based on the process setting requirements, the final derivation is Px = 271.6 / (Y2-Y1) - 1.8.

[0046] Step S130: When the blower's operating point exceeds the vent line, adjust the anti-surge valve to fully open. If the blower's operating point exceeds the vent line, the anti-surge valve can be fully opened and locked via controller or manual control to quickly pull the operating point back to the safe zone.

[0047] In one embodiment, when the blower's operating point is between the set adjustment line and the set vent line, the method further includes: locking the manual closing function of the anti-surge valve; when the blower's operating point exceeds the vent line, step S130 adjusts the opening of the anti-surge valve to fully open, including: switching to the manual adjustment state of the anti-surge valve so that the opening of the anti-surge valve can be manually adjusted to fully open. When the operating point is between the vent line and the adjustment line, the manual closing function of the anti-surge valve is locked to prevent accidental operation; when the operating point exceeds the vent line, the PID controller switches to manual state and outputs a fully open valve signal.

[0048] Furthermore, in step S120, controlling the opening of the blower's anti-surge valve via PID regulation includes: when increasing the opening of the anti-surge valve through PID regulation, increasing it to the target opening within a unit cycle; when decreasing the opening of the anti-surge valve through PID regulation, adjusting the opening by a fixed amount per unit cycle. The specific values ​​of the unit cycle and the fixed amount are not unique and can be set according to actual needs.

[0049] When the fan experiences critical surge (the operating point reaches the regulating line), the anti-surge valve will open according to the control algorithm. At this time, the exhaust pressure is released, the operating point is pulled back, and the PID control output will decrease. Then, the operating point will surge back towards and exceed the regulating line. If no measures are taken, the operating point will fluctuate back and forth around the regulating line. Therefore, from the perspective of protecting the unit, the anti-surge valve control needs to have a fast-opening and slow-closing function.

[0050] One approach is to add an intermediate variable to the PID control for control transmission. This variable compares the control output with the final output within a unit cycle. When the control output increases, the control value is directly transmitted to the final output within the unit cycle, achieving "fast opening" of the opening function. When the control output decreases, the transmitted value decreases by a fixed amount per unit cycle, achieving "slow closing" of the closing function, for example, closing at a rate of 1% every 4 seconds. Furthermore, on the regulating line, the proportional coefficient P value of the PID control is relatively small; on the regulating line (below the vent line), a variable P value adjustment for the proportional coefficient can also, to some extent, ensure the "fast opening, slow closing" function of the anti-surge valve.

[0051] Specifically, according to the process requirements of anti-surge control, the controllability and reliability of the actuator's actions are the criteria for evaluating the success of the control algorithm. First, accurate signal detection from the blower equipment and reliable operation of the anti-surge valve are fundamental requirements for the unit's anti-surge control. Second, while ensuring rapid actuator action, the negative fluctuations in blast furnace air pressure and volume should also be considered, and efforts should be made to minimize the impact. Finally, ensuring the safety of the blower unit is the fundamental task. That is, in the event of extreme abnormal operating conditions, quickly opening the anti-surge valve can rapidly pull the operating point back to a safe area, preventing surge in the unit. The ultimate actuator in anti-surge control is the anti-surge valve, combined with... Figure 2It is known that under normal circumstances, the operating point is within the safe zone. When external pipeline influences cause the operating point to deteriorate, and the operating point just crosses the regulating line (green line), the anti-surge valve opens at a small angle to pull the operating point back to near below the regulating line. Simultaneously, an audible and visual alarm is triggered to alert operators of a potential abnormal operating point. Since the PID controller output remains, the operating point will continue to move closer to the regulating line. At this point, the advantage of the anti-surge valve's "slow-closing" characteristic becomes apparent, providing operators with sufficient time to think and operate. By manually opening the anti-surge valve, the operating point can be pulled back to the safe zone, thus protecting the unit. The greater the deviation of the operating point from the regulating line and the closer it is to the vent line (red line), the larger the opening of the anti-surge valve and the faster the response speed. When the operating point reaches the vent line, the unit enters a safe operating state, and the anti-surge valve quickly opens fully and locks, rapidly pulling the operating point back to the safe zone.

[0052] In one embodiment, the operating reference data further includes the motor operating status and speed. Step S110, determining the blower's operating point based on the operating reference data, includes: determining that the blower's motor is in operation based on the motor operating status and speed, and when the speed is greater than a set speed threshold, determining the blower's operating point based on the throat difference and exhaust pressure.

[0053] Normally, blowers operate below the setpoint. Due to persistent deviations between the PID control input and feedback, integral saturation has occurred during routine maintenance, causing the anti-surge valve to malfunction. To mitigate this issue, two signals were added to the PID control enable pin: ① "Motor running" signal, ② "Speed ​​greater than set speed threshold (e.g., 300 rpm)". PID control is only applied when the blower motor is running and the speed exceeds the set speed threshold, analyzing the actual operating point to eliminate integral saturation. Furthermore, during shutdown maintenance, background data overflow is checked and cleared as needed, which also helps eliminate integral saturation.

[0054] Furthermore, in one embodiment, such as Figure 3 As shown, after step S110, the method further includes steps S140 to S160.

[0055] Step S150: If at least two of the obtained throat differences are less than the set threshold, it is determined that a backflow phenomenon has occurred.

[0056] Step S160: After the backflow phenomenon continues until the preset alarm duration threshold is reached, output alarm information;

[0057] Step S170: After the backflow phenomenon continues until the preset shutdown time threshold is reached, control the blower unit to interlock and shut down.

[0058] The shutdown duration threshold is greater than the alarm duration threshold. For example, the shutdown duration threshold can be set to 3 seconds, and the alarm duration threshold can be set to 9 seconds. Specifically, three analog throat difference signals can be collected simultaneously, and a 2-out-of-3 logic protection is implemented in the program. That is, if two conditions are met simultaneously: when the throat difference is less than the set threshold (e.g., 1.5 kPa), a backflow phenomenon is considered to have occurred, and an appropriate delay is made in the program. If the backflow phenomenon lasts for 3 seconds, an alarm signal is issued to remind the operator to respond appropriately. If the backflow phenomenon lasts for 6 seconds, the blower unit enters a safe operating state; when the backflow phenomenon lasts for 9 seconds, it is identified as entering a "continuous backflow" state, and the blower unit is shut down protectively. This logic algorithm protects the blower unit and avoids irreversible damage to the blower unit caused by continuous backflow.

[0059] Furthermore, in one embodiment, after step S110, the method further includes: outputting an operating point reminder message when the blower's operating point is between a set alarm line and a set adjustment line. By adding an alarm line below the adjustment line (not displayed on the human-machine interface), the operator is alerted to the operating point's location when it crosses the alarm line, preventing unnecessary losses due to misoperation. The method of outputting the operating point reminder message is not unique; it can be achieved through at least one of controlling the display screen to show information, illuminating indicator lights, and emitting sound from a speaker.

[0060] The line-crossing test is a good method to verify the anti-surge control algorithm of the system. Similar to the surge test when the unit is initially put into operation, the air supply valve is closed, the stator vanes are adjusted to a certain position, and then the anti-surge valve is slowly closed to bring the operating point to the desired level. Figure 4 At the blue dot (①), slowly move past the adjustment line, observe the response speed of the anti-surge valve and the operating status of the working point, and adjust and optimize the appropriate parameters. Under slight pressure buildup in the air supply network, the anti-surge valve's response is reasonable, the opening matches the operating conditions, and the impact on air volume and pressure is minimized. Similarly, adjust the stationary vanes to a certain position, slowly close the anti-surge valve, and operate at the operating point... Figure 4 Position ② close to the regulating line, then continuously and rapidly close 4-5 stationary vane angles. Observe whether the anti-surge valve control logic can quickly pull the operating point back to the safe zone, and during this process, verify whether the "fast opening, slow closing" characteristic of the anti-surge valve meets the process requirements. From Figure 4 As can be seen from the operating point trend, the control algorithm provided in this application fully meets the design requirements for protecting the safety of the unit.

[0061] The aforementioned blower anti-surge protection method, targeting blowers that utilize a TURBOLOG controller for anti-surge protection, studies the basic control logic of the TURBOLOG controller, achieving seamless integration between controller protection and PLC logic protection. This eliminates the need for the TURBOLOG controller, using PLC logic programming to implement blower anti-surge protection, ensuring that process air supply requirements are not affected, effectively reducing spare parts costs, eliminating the need for on-site spare parts reserves, significantly reducing the uncontrollable risks caused by the original controller failure, avoiding the possibility of long-term blower shutdown, and safeguarding the long-term stable and smooth production of the blast furnace.

[0062] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0063] Based on the same inventive concept, this application also provides a blower anti-surge protection device for implementing the blower anti-surge protection method described above. The solution provided by this device is similar to the solution described in the above method; therefore, the specific limitations of one or more blower anti-surge protection device embodiments provided below can be found in the limitations of the blower anti-surge protection method described above, and will not be repeated here.

[0064] In one embodiment, such as Figure 5 As shown, a blower anti-surge protection device is provided, implemented based on a PLC controller. The device includes a working point analysis module 110 and an opening adjustment module 120, wherein:

[0065] The operating point analysis module 110 is used to obtain the operating reference data of the blower and determine the operating point of the blower based on the operating reference data.

[0066] The opening adjustment module 120 is used to control the opening of the blower's anti-surge valve through PID regulation when the blower's operating point is between the set adjustment line and the set vent line. The adjustment range increases as the distance between the operating point and the adjustment line increases. When the blower's operating point crosses the vent line, the opening of the anti-surge valve is adjusted to be fully open. The operating reference data includes throat difference and exhaust pressure. The adjustment line and vent line are generated based on surge test data, with throat difference as the horizontal axis and exhaust pressure as the vertical axis. The area below the adjustment line is the blower's safe operating zone, the area between the adjustment line and the vent line is the blower's adjustment zone, and the area above the vent line is the blower's surge and venting zone.

[0067] In one embodiment, the operating reference data also includes the motor operating status and speed; the operating point analysis module 110 determines that the blower motor is in working condition based on the motor operating status and speed, and when the speed is greater than the set speed threshold, it determines the operating point of the blower based on the throat difference and exhaust pressure.

[0068] In one embodiment, when the opening of the anti-surge valve is increased by PID regulation, the opening is increased to the target opening within a unit cycle; when the opening of the anti-surge valve is decreased by PID regulation, the opening is adjusted by decreasing by a fixed amount per unit cycle.

[0069] In one embodiment, the opening adjustment module 120 is further configured to lock the manual closing function of the anti-surge valve when the operating point of the blower is between the set adjustment line and the set vent line; and to switch to the manual adjustment state of the anti-surge valve when the operating point of the blower crosses the vent line, so as to manually adjust the opening of the anti-surge valve to be fully open.

[0070] In one embodiment, the opening adjustment module 120 is further configured to output an operating point reminder message when the operating point of the blower is between a set alarm line and a set adjustment line.

[0071] In one embodiment, the device further includes a backflow adjustment module 130, which is used to determine that a backflow phenomenon has occurred if at least two of the acquired throat differences are less than a set threshold; output alarm information after the backflow phenomenon continues to a preset alarm duration threshold; and control the blower unit to interlock and shut down after the backflow phenomenon continues to a preset shutdown duration threshold; wherein the shutdown duration threshold is greater than the alarm duration threshold.

[0072] Each module in the aforementioned blower anti-surge protection device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of the electronic device in hardware form or independently of it, or stored in the memory of the electronic device in software form, so that the processor can call and execute the corresponding operations of each module.

[0073] In one embodiment, an electronic device is provided, which may be a terminal, and its internal structure diagram may be as follows: Figure 6 As shown, the electronic device includes a processor, memory, input / output interface, communication interface, display unit, and input device. The processor, memory, and input / output interface are connected via a system bus, and the communication interface, display unit, and input device are also connected to the system bus via the input / output interface. The processor provides computing and control capabilities. The memory includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The input / output interface is used for exchanging information between the processor and external devices. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, mobile cellular networks, NFC (Near Field Communication), or other technologies. When the computer program is executed by the processor, it implements a blower anti-surge protection method. The display unit is used to form a visually visible image and can be a display screen, projection device, or virtual reality imaging device. The display screen can be an LCD screen or an e-ink screen. The input device of the electronic device can be a touch layer covering the display screen, or buttons, trackballs, or touchpads set on the casing of the electronic device, or external keyboards, touchpads, or mice, etc.

[0074] Those skilled in the art will understand that Figure 6 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the electronic device to which the present application is applied. The specific electronic device may include more or fewer components than shown in the figure, or combine certain components, or have different component arrangements.

[0075] In one embodiment, an electronic device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps of the method described above.

[0076] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the steps of the method described above.

[0077] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps of the method described above.

[0078] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments described above. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0079] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0080] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A method for preventing surge in a blower, characterized in that, Based on a PLC controller, this method includes: Obtain the operating reference data of the blower, and determine the operating point of the blower based on the operating reference data; When the operating point of the blower is between the set adjustment line and the set venting line, the opening of the anti-surge valve of the blower is controlled by PID regulation, and the adjustment range increases as the distance between the operating point and the adjustment line increases. When the operating point of the blower exceeds the vent line, the opening of the anti-surge valve is adjusted to be fully open; When the operating point of the blower is between the set alarm line and the set adjustment line, an operating point reminder message is output; The operating reference data includes throat difference and exhaust pressure. The adjustment line and the vent line are generated from surge test data with throat difference as the horizontal axis and exhaust pressure as the vertical axis. The area below the adjustment line is the safe operating area of ​​the blower, the area between the adjustment line and the vent line is the adjustment area of ​​the blower, and the area above the vent line is the surge venting area of ​​the blower. The operating reference data also includes the motor operating status and speed; determining the operating point of the blower based on the operating reference data includes: Based on the motor's operating status and speed, it is determined that the blower's motor is in operation and the speed is greater than a set speed threshold. Then, the operating point of the blower is determined based on the throat difference and the exhaust pressure. When the operating point of the blower is between the regulating line and the venting line, the proportional coefficient P of the PID control is: P = P1 + Px × (Y - Y1) / (Y2 - Y1) Px = 271.6 / (Y2-Y1) - 1.8 Where P1 is a fixed value and Px is a variable value; Y is the exhaust pressure value at the operating point, and Y1 and Y2 are the ordinate values ​​of the adjustment line and vent line corresponding to the operating point, respectively.

2. The method according to claim 1, characterized in that, The step of controlling the opening of the anti-surge valve of the blower by PID regulation includes: when increasing the opening of the anti-surge valve by PID regulation, increasing it to the target opening within a unit cycle; and when decreasing the opening of the anti-surge valve by PID regulation, adjusting the opening by decreasing it by a fixed amount per unit cycle.

3. The method according to claim 1, characterized in that, When the operating point of the blower is between the set adjustment line and the set venting line, the method also includes: locking the manual closing function of the anti-surge valve. When the operating point of the blower crosses the vent line, adjusting the opening of the anti-surge valve to be fully open includes: switching to the manual adjustment state of the anti-surge valve so as to manually adjust the opening of the anti-surge valve to be fully open.

4. The method according to claim 1, characterized in that, After obtaining the operating reference data of the blower, the process also includes: If at least two of the obtained throat differences are less than the set threshold, then a backflow phenomenon is determined to have occurred. An alarm message is output after the backflow phenomenon continues for a preset alarm duration threshold. After the backflow phenomenon continues for a preset shutdown duration threshold, the blower unit is controlled to shut down interlocked; wherein, the shutdown duration threshold is greater than the alarm duration threshold.

5. The method according to any one of claims 1-4, characterized in that, The output of the operating condition reminder information includes: providing operating condition reminders through at least one of the following: displaying information on the control screen, illuminating indicator lights, and emitting sound from a speaker.

6. A blower anti-surge protection device, characterized in that, Based on a PLC controller, the apparatus for implementing the method according to any one of claims 1 to 5 comprises: The operating point analysis module is used to obtain the operating reference data of the blower and determine the operating point of the blower based on the operating reference data. The opening adjustment module is used to control the opening of the anti-surge valve of the blower through PID regulation when the operating point of the blower is between the set adjustment line and the set vent line, and the adjustment range increases as the distance between the operating point and the adjustment line increases; when the operating point of the blower crosses the vent line, the opening of the anti-surge valve is adjusted to be fully open; when the operating point of the blower is between the set alarm line and the set adjustment line, an operating point reminder message is output. The operating reference data includes throat difference and exhaust pressure. The adjustment line and the vent line are generated from surge test data with throat difference as the horizontal axis and exhaust pressure as the vertical axis. The area below the adjustment line is the safe operating area of ​​the blower, the area between the adjustment line and the vent line is the adjustment area of ​​the blower, and the area above the vent line is the surge venting area of ​​the blower.

7. An electronic device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 5.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 5.

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