Compressor unit control method, device and equipment, medium and computer program product

Abstract

The invention relates to a compressor unit control method, device and equipment, a medium and a computer program product. The method comprises the following steps: acquiring a current backflow loop flow value of a high-pressure unit flowing back to a low-pressure unit, calculating a flow change value of the current backflow loop flow according to the backflow loop flow value, judging whether an absolute value of the flow change value is greater than a preset first threshold value or not, and if the absolute value of the flow change value is greater than the preset first threshold value, starting the low-pressure unit. If yes, the flow change value is fed back to the high-pressure unit control unit through a preset feedforward control unit, and the inlet flow of the high-pressure unit is pre-adjusted based on the high-pressure unit control unit according to the flow change value, so that the surge phenomenon is reduced. Compared with the prior art, according to the embodiment of the invention, the series unit can be fed back and controlled in advance according to the flow change value of the flow of the backflow loop, so that the sustainability and reliability of operation of the unit are greatly improved, and surge of the unit can be prevented in advance.

Description

Technical Field

[0001] The present disclosure relates to the field of compressor technology, and in particular to a compressor unit control method, device, equipment, medium, and computer program product. Background Art

[0002] Centrifugal compressors are commonly used gas pressurization equipment. Surge is an inherent characteristic of centrifugal compressors. When the compressor flow rate decreases or the pressure differential increases, centrifugal compressors are prone to surge, affecting their normal operation. Therefore, anti-surge control and performance control are core issues in compressor control.

[0003] At present, the anti-surge technology for single centrifugal compressors is relatively mature. However, sometimes in order to increase the pressure, two compressors need to be operated in series. At this time, due to the mutual influence between the low-pressure unit and the high-pressure unit, the anti-surge control of the series units becomes extremely difficult. In particular, the high-pressure unit is more prone to surge due to the influence of the low-pressure unit and itself, which puts forward new requirements for the control method.

[0004] In the related art, cascade feedback control is mostly used for series units, that is, the control is carried out from the low-pressure unit to the high-pressure unit in sequence. Often, the control is not timely enough, and the additional interference has entered the high-pressure unit through the low-pressure unit. Because the operating range of the high-pressure unit is narrow, it may have caused the high-pressure unit to surge, and then the low-pressure unit can be adjusted. Although the main and secondary loops of the cascade feedback are controllable and measurable, there is a certain lag in the unit adjustment, and the unit surge often occurs in an instant. In addition, for the unit adjustment, in order to prevent excessive pressure fluctuations, rapid adjustment is generally avoided to prevent pressure fluctuations caused by excessively fast adjustment speeds. In some cases, adjustment lags are inevitable, and the anti-surge effect is poor. Summary of the Invention

[0005] In order to solve the above technical problems or at least partially solve the above technical problems, the present disclosure provides a compressor unit control method, device, equipment, medium and computer program product, which can stably control the series units. At the same time, for sudden conditions of the units, rapid feedback control can be performed in advance, so that the sustainability and reliability of the unit operation are greatly improved, and unit surge can be prevented in advance.

[0006] In a first aspect, an embodiment of the present disclosure provides a method for controlling a compressor unit, wherein the compressor unit includes a low-pressure unit and a high-pressure unit, and the method includes: Get the return flow rate value of the current high-pressure unit returning to the low-pressure unit; Calculating a current flow change value of the return circuit flow according to the return circuit flow value; Determine whether the absolute value of the flow change value of the current return loop flow is greater than a preset first threshold; If the absolute value of the flow change value is greater than the preset first threshold, the flow change value is fed back to the high-pressure unit control unit through the preset feedforward control unit, and the high-pressure unit control unit pre-adjusts the inlet flow of the high-pressure unit according to the flow change value.

[0007] In some embodiments, obtaining the current return flow value of the high-pressure unit returning to the low-pressure unit includes: The return loop flow is monitored in real time based on the return monitoring unit to obtain the return loop flow value of the current high-pressure unit returning to the low-pressure unit.

[0008] In some embodiments, calculating the current flow change value of the return circuit flow according to the return circuit flow value includes: Calculating a difference between the return loop flow rate value and an average value of the return loop flow rate in a past time period, and / or calculating a difference between the return loop flow rate value and the return loop flow rate at a previous moment; The difference is determined as the flow change value of the current return loop flow.

[0009] In some embodiments, the pre-adjusting the inlet flow of the high-pressure unit based on the high-pressure unit control unit according to the flow change value includes: Calculating the product of the flow change value and the preset proportional value, and determining the product of the flow change value and the preset proportional value as the target change value; Based on the high pressure unit control unit and the target change value, the inlet guide vanes of the high pressure unit are adjusted to adjust the inlet flow of the high pressure unit.

[0010] In some embodiments, after calculating the current flow change value of the return circuit flow, the method further includes: Determine whether the absolute value of the flow change value of the current return loop flow is less than a preset second threshold; If the absolute value of the flow rate change value is smaller than the preset second threshold value, a signal indicating that no adjustment is performed is fed back to the low-pressure unit control unit through the preset feedforward control unit.

[0011] In some embodiments, after feeding back a signal not to perform adjustment to the low-voltage unit control unit through a preset feedforward control unit, the method further includes: Determine whether the current inlet flow of the low-pressure unit is greater than a preset inlet flow threshold value by the low-pressure unit control unit; If so, the vent valve of the low-pressure unit is adjusted based on the self-regulating mechanism of the low-pressure unit control unit to reduce the inlet flow of the high-pressure unit.

[0012] In some embodiments, after calculating the current flow change value of the return circuit flow, the method further includes: Determine whether the absolute value of the flow change value of the current return loop flow is greater than a preset third threshold; If the absolute value of the flow change value is greater than the preset third threshold value, the flow change value is fed back to the high-pressure unit control unit through the preset feedforward control unit, and the flow value portion of the flow change value that exceeds the preset third threshold value is adjusted by the vent valve of the high-pressure unit through the high-pressure unit control unit.

[0013] In a second aspect, an embodiment of the present disclosure provides a compressor unit control device, wherein the compressor unit includes a low-pressure unit and a high-pressure unit, and the device includes: An acquisition module is used to obtain the return flow value of the current high-pressure unit returning to the low-pressure unit; A calculation module, configured to calculate a flow change value of a current return circuit flow according to the return circuit flow value; A judgment module, configured to judge whether the absolute value of the flow change value of the current return loop flow is greater than a preset first threshold; A control module is used to feed back the flow change value to the high-pressure unit control unit through a preset feedforward control unit if the absolute value of the flow change value is greater than the preset first threshold value, and pre-adjust the inlet flow of the high-pressure unit based on the flow change value by the high-pressure unit control unit.

[0014] In a third aspect, an embodiment of the present disclosure provides an electronic device, including: Memory; processor; and computer programs; The computer program is stored in the memory and is configured to be executed by the processor to implement the method as described in the first aspect.

[0015] In a fourth aspect, an embodiment of the present disclosure provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program is executed by a processor to implement the method as described in the first aspect.

[0016] In a fifth aspect, an embodiment of the present disclosure further provides a computer program product, which includes a computer program or instructions, and when the computer program or instructions are executed by a processor, implements the method described in the first aspect.

[0017] The compressor unit control method, apparatus, device, medium, and computer program product provided by the embodiments of the present disclosure obtain the current return loop flow value of the high-pressure unit returning to the low-pressure unit, calculate the current return loop flow rate change value based on the return loop flow rate value, and determine whether the absolute value of the current return loop flow rate change value is greater than a preset first threshold value. If the absolute value of the flow rate change value is greater than the preset first threshold value, the flow rate change value is fed back to the high-pressure unit control unit through a preset feedforward control unit, and the high-pressure unit control unit pre-adjusts the inlet flow of the high-pressure unit based on the flow rate change value to reduce the occurrence of surge. Compared with the prior art, the embodiments of the present disclosure can monitor the return loop flow value of the high-pressure unit returning to the low-pressure unit, and further provide feedback and advance control to the series unit based on the calculated return loop flow rate change value, thereby significantly improving the sustainability and reliability of the unit operation and preventing unit surge in advance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0019] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0020] Figure 1 A flow chart of a compressor unit control method provided in an embodiment of the present disclosure; Figure 2 A flow chart of a compressor unit control method provided by another embodiment of the present disclosure; Figure 3 A flow chart of a compressor unit control method provided by another embodiment of the present disclosure; Figure 4 A schematic diagram of the overall architecture of a compressor unit provided in an embodiment of the present disclosure; Figure 5 A schematic structural diagram of a compressor unit control device provided in an embodiment of the present disclosure; Figure 6 A schematic diagram of the structure of an electronic device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0021] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features therein can be combined with each other in the absence of conflict.

[0022] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0023] Centrifugal compressors are commonly used gas pressurization equipment. Surge is an inherent characteristic of centrifugal compressors. When the compressor flow rate decreases or the pressure differential increases, centrifugal compressors are prone to surge, affecting their normal operation. Therefore, anti-surge control and performance control are core issues in compressor control.

[0024] At present, the anti-surge technology for single centrifugal compressors is relatively mature. However, sometimes in order to increase the pressure, two compressors need to be operated in series. At this time, due to the mutual influence between the low-pressure unit and the high-pressure unit, the anti-surge control of the series units becomes extremely difficult. In particular, the high-pressure unit is more prone to surge due to the influence of the low-pressure unit and itself, which puts forward new requirements for the control method.

[0025] In the related art, cascade feedback control is mostly used for series units, that is, the control is carried out from the low-pressure unit to the high-pressure unit in sequence. Often, the control is not timely enough, and the additional interference has entered the high-pressure unit through the low-pressure unit. Because the operating range of the high-pressure unit is narrow, it may have caused the high-pressure unit to surge, and then the low-pressure unit can be adjusted. Although the main and secondary loops of the cascade feedback are controllable and measurable, there is a certain lag in the unit adjustment, and the unit surge often occurs in an instant. In addition, for the unit adjustment, in order to prevent excessive pressure fluctuations, rapid adjustment is generally avoided to prevent pressure fluctuations caused by excessively fast adjustment speeds. In some cases, adjustment lags are inevitable, and the anti-surge effect is poor.

[0026] To address this problem, an embodiment of the present disclosure provides a method for controlling a compressor unit, wherein the compressor unit includes a low-pressure unit and a high-pressure unit. The method is introduced below in conjunction with specific embodiments.

[0027] Figure 1 This is a flow chart of the compressor unit control method provided in an embodiment of the present disclosure. This method is executed by an electronic device and can be applied to controlling a compressor unit or preventing compressor unit surge. It is understood that the compressor unit control method provided in an embodiment of the present disclosure can also be applied in other scenarios.

[0028] Below Figure 1 The compressor unit control method shown in FIG. 1 is introduced, and the specific steps of the method are as follows: S101: Obtain the current return flow rate value of the high-pressure unit returning to the low-pressure unit.

[0029] In this step, the electronic device obtains the return flow value of the current high-pressure unit returning to the low-pressure unit. Optionally, the electronic device can monitor the return flow to obtain the return flow value. Figure 4 The flow rate shown is the flow rate from the high-pressure unit outlet back to the low-pressure unit inlet.

[0030] S102: Calculate a current flow change value of the return circuit flow according to the return circuit flow value.

[0031] In this step, the electronic device can calculate the current return circuit flow rate change value based on the return circuit flow rate value. In some embodiments, the electronic device calculates the difference between the return circuit flow rate value and the average return circuit flow rate over a past time period as the current return circuit flow rate change value. The past time period can be the past 30 seconds, the past minute, or the past three minutes, without specific limitation.

[0032] In other embodiments, the electronic device may also calculate a current return circuit flow rate change value based on the current return circuit flow rate value and the return circuit flow rate value at a previous moment. The difference between the current return circuit flow rate value and the return circuit flow rate value at a previous moment is calculated as the current return circuit flow rate change value.

[0033] S103: Determine whether the absolute value of the current flow rate change value of the return loop flow rate is greater than a preset first threshold.

[0034] In this step, the electronic device determines whether the absolute value of the flow change value of the current return circuit flow is greater than a preset first threshold. In some embodiments, the preset first threshold can be 1% to 10% of the low-pressure unit inlet flow setting value. For example, when the inlet flow setting value is 1000Nm 3 / h, the preset first threshold value range can be 10-100Nm 3 / h, the preset first threshold value can be 20 Nm 3 / h, and may also be other values ​​without specific limitation.

[0035] S104. If the absolute value of the flow change value is greater than the preset first threshold value, the flow change value is fed back to the high-pressure unit control unit through the preset feedforward control unit, and the high-pressure unit control unit pre-adjusts the inlet flow of the high-pressure unit according to the flow change value.

[0036] In this step, if it is determined that the absolute value of the flow rate change value is greater than the preset first threshold, Figure 4The preset feedforward control unit (GFFc) shown in the figure feeds back the flow change value to the high-pressure unit control unit, and the high-pressure unit control unit pre-adjusts the inlet flow of the high-pressure unit according to the flow change value.

[0037] like Figure 4 As shown, Gc1 is the low-pressure unit control unit, and Gc2 is the high-pressure unit control unit. TE1 is the low-pressure unit outlet temperature monitoring unit, TE2 is the high-pressure unit outlet temperature monitoring unit, FE1 is the low-pressure unit outlet flow monitoring unit, FE2 is the high-pressure unit outlet flow monitoring unit, PT1 is the low-pressure unit exhaust pressure monitoring unit, and PT2 is the high-pressure unit exhaust pressure monitoring unit. SV1 is the low-pressure unit inlet flow control unit, SV3 is the high-pressure unit inlet flow control unit, SV2 is the low-pressure unit outlet flow control unit, and SV4 is the high-pressure unit outlet flow control unit. FOV is the return flow monitoring unit, used to monitor the flow rate from the high-pressure unit outlet to the low-pressure unit inlet. Among them, SV1 and SV3 can adjust the inlet guide vanes (IGV) of the low-pressure unit and the high-pressure unit, and adjust the inlet flow of the low-pressure unit and the high-pressure unit by adjusting the opening size of the IGV of the low-pressure unit and the high-pressure unit; SV2 and SV4 can adjust the blow-off valves (BOV) of the low-pressure unit and the high-pressure unit, and adjust the outlet flow of the low-pressure unit and the high-pressure unit by adjusting the opening size of the BOV of the low-pressure unit and the high-pressure unit.

[0038] For high-pressure units, the outlet flow of the high-pressure units can be divided into three parts: the emptying part of the high-pressure unit vent valve, the part flowing to use or the next level, and the reflux part.

[0039] The embodiment of the present disclosure obtains the return loop flow value of the current high-pressure unit returning to the low-pressure unit, calculates the flow change value of the current return loop flow based on the return loop flow value, and determines whether the absolute value of the flow change value of the current return loop flow is greater than a preset first threshold value. If the absolute value of the flow change value is greater than the preset first threshold value, the flow change value is fed back to the high-pressure unit control unit through a preset feedforward control unit, and the high-pressure unit control unit pre-adjusts the inlet flow of the high-pressure unit based on the flow change value to reduce the occurrence of surge. Compared with the prior art, the embodiment of the present disclosure can monitor the return loop flow value of the high-pressure unit returning to the low-pressure unit, and further provide feedback and advance control to the series unit based on the calculated flow change value of the return loop flow, so that the sustainability and reliability of the unit operation are greatly improved, and unit surge can be prevented in advance.

[0040] Figure 2This is a flow chart of a compressor unit control method provided by another embodiment of the present disclosure, wherein the compressor unit includes a low-pressure unit and a high-pressure unit, such as Figure 2 As shown, the method includes the following steps: S201: Monitor the return loop flow in real time based on the return monitoring unit to obtain the return loop flow value of the current high-pressure unit returning to the low-pressure unit.

[0041] In this step, the electronic device monitors the return loop flow in real time through the return monitoring unit to obtain the return loop flow value of the current high-pressure unit returning to the low-pressure unit. Figure 4 As shown, FOV is a reflux monitoring unit, which is used to monitor the flow value of the reflux from the high-pressure unit outlet to the low-pressure unit inlet. The reflux loop flow value of the current high-pressure unit reflux to the low-pressure unit is obtained through FOV monitoring.

[0042] S202: Calculate the difference between the return loop flow value and the average value of the return loop flow in a past time period, and / or calculate the difference between the return loop flow value and the return loop flow at a previous moment.

[0043] In this step, after obtaining the current return flow rate value of the high-pressure unit returning to the low-pressure unit, the electronic device can calculate the difference between the return flow rate value and the average return flow rate in the past time period, and / or calculate the difference between the return flow rate value and the return flow rate at the previous moment. For example, the return flow rate value is 130Nm 3 / h, the average return flow rate in the past period is 100Nm 3 / h, the difference between the return circuit flow value and the average value of the return circuit flow is calculated to be 130-100=30Nm 3 For another example, the return circuit flow rate is 130 Nm3 / h, and the return circuit flow rate at the previous moment is 100 Nm3 / h. The difference between the current return circuit flow rate and the return circuit flow rate at the previous moment is calculated as 130-100=30 Nm3 / h.

[0044] S203: Determine the difference as the flow change value of the current return loop flow.

[0045] After calculating the difference, the electronic device determines the difference as the current flow change value of the return circuit flow. Specifically, for the two differences calculated in the two ways, either one of the two differences can be taken as the current flow change value of the return circuit flow, or the two differences can be averaged and the average of the two differences can be taken as the current flow change value of the return circuit flow. For example, if the difference is calculated to be 30Nm 3 / h, then the current flow change value of the return circuit flow is determined to be 30Nm 3 / h.

[0046] S204: Determine whether the absolute value of the current flow rate change value of the return loop flow rate is greater than a preset first threshold.

[0047] Specifically, the implementation process and principle of S204 and S103 are the same and will not be described in detail here.

[0048] S205: If the absolute value of the flow rate change value is greater than the preset first threshold, the flow rate change value is fed back to the high-pressure unit control unit through a preset feedforward control unit.

[0049] In this step, if the electronic device determines that the absolute value of the flow change value is greater than the preset first threshold, the flow change value is fed back to the high-voltage unit control unit through the preset feedforward control unit, such as Figure 4 As shown, by feeding back the flow change value to the high-pressure unit control unit (Gc2) through Gffc, the flow change value can be fed back to the high-pressure unit in advance, which facilitates rapid control of the flow change value, greatly improves the sustainability and reliability of the unit operation, and can prevent unit surge in advance.

[0050] S206: Calculate the product of the flow change value and the preset ratio value, and determine the product of the flow change value and the preset ratio value as the target change value.

[0051] In this step, the product of the flow change value and the preset ratio value is calculated, and the product of the flow change value and the preset ratio value is determined as the target change value. Optionally, the preset ratio value is 80%, or other values, without specific limitation. For example, when the flow change value is 30Nm 3 / h, when the preset ratio is 80%, the target change value is 30×80%=24Nm 3 The reason for using the target change value instead of the flow change value for adjustment is that the low-pressure unit will perform flow emptying operations during self-regulation, and the unit flow will be attenuated due to loss. Therefore, only the flow change value of the preset proportional value needs to be adjusted.

[0052] S207 , adjusting the inlet guide vanes of the high-pressure unit based on the high-pressure unit control unit and the target change value to adjust the inlet flow of the high-pressure unit.

[0053] In this step, the electronic device adjusts the inlet guide vanes of the high-pressure unit by combining the target change value through the high-pressure unit control unit to adjust the inlet flow of the high-pressure unit. Figure 4As shown, the electronic equipment can adjust the opening of the high-pressure unit's inlet guide vanes (IGVs), thereby regulating the high-pressure unit's inlet flow, thereby reducing the impact on high-pressure unit operation and the risk of high-pressure unit surge. Through feedforward control, the high-pressure unit can be quickly regulated based on flow changes, reducing interference with the unit, especially the impact on high-pressure unit operation, and greatly improving regulation speed.

[0054] The disclosed embodiment monitors the return loop flow in real time based on a return flow monitoring unit to obtain the current return loop flow value of the high-pressure unit returning to the low-pressure unit. The difference between the return loop flow value and the average return loop flow rate over a past time period is calculated, and / or the difference between the return loop flow value and the return loop flow rate at a previous moment is calculated, and the difference is determined as the current return loop flow rate change value. Furthermore, the absolute value of the current return loop flow rate change value is determined to be greater than a preset first threshold. If the absolute value of the flow rate change value is greater than the preset first threshold, the flow rate change value is fed back to the high-pressure unit control unit via a preset feedforward control unit. The product of the flow rate change value and a preset proportional value is then calculated, and the product of the flow rate change value and the preset proportional value is determined as a target change value. The high-pressure unit control unit adjusts the inlet guide vanes of the high-pressure unit in combination with the target change value to adjust the high-pressure unit inlet flow rate. Compared to existing technologies, the disclosed embodiment can monitor the return flow rate from the high-pressure unit to the low-pressure unit, and further provide feedback and advance control of the series units based on the calculated flow rate change of the return flow rate, significantly improving the sustainability and reliability of the unit operation and preventing unit surge in advance. Through feedforward control, the high-pressure unit can be quickly regulated based on the flow rate change value, reducing interference with the unit, especially the impact on the operation of the high-pressure unit, and greatly improving the regulation speed.

[0055] Figure 3 This is a flow chart of a compressor unit control method provided by another embodiment of the present disclosure, wherein the compressor unit includes a low-pressure unit and a high-pressure unit, such as Figure 3 As shown, the method includes the following steps: S301: Obtain the current return flow rate value of the high-pressure unit returning to the low-pressure unit.

[0056] Specifically, the implementation process and principle of S301 and S101 are the same and will not be described in detail here.

[0057] S302: Calculate a current flow change value of the return circuit flow according to the return circuit flow value.

[0058] Specifically, the implementation process and principle of S302 and S102 are the same and will not be described in detail here.

[0059] S303: Determine whether the absolute value of the current flow rate change value of the return loop flow rate is greater than a preset first threshold.

[0060] Specifically, the implementation process and principle of S303 and S103 are the same, and will not be repeated here.

[0061] S304. If the absolute value of the flow change value is greater than the preset first threshold value, the flow change value is fed back to the high-pressure unit control unit through the preset feedforward control unit, and the high-pressure unit control unit pre-adjusts the inlet flow of the high-pressure unit according to the flow change value.

[0062] Specifically, the implementation process and principle of S304 and S104 are the same, and will not be repeated here.

[0063] S305: Determine whether the absolute value of the current flow rate change value of the return loop flow rate is less than a preset second threshold.

[0064] In this step, the electronic device determines whether the absolute value of the flow change value of the current return circuit flow is less than the preset second threshold value. In some embodiments, the preset second threshold value can be 1% of the low-pressure unit inlet flow setting value. For example, when the inlet flow setting value is 1000Nm 3 / h, the preset second threshold value is 10Nm 3 / h, and can also be set to other values ​​without specific limitation.

[0065] It should be noted that the preset second threshold is smaller than the preset first threshold, and the preset first threshold is smaller than the preset third threshold.

[0066] S306: If the absolute value of the flow rate change value is less than the preset second threshold value, a signal not to perform adjustment is fed back to the low-pressure unit control unit through the preset feedforward control unit.

[0067] Furthermore, if the electronic device determines that the absolute value of the flow rate change is less than the preset second threshold, it feeds back a signal to the low-pressure unit control unit via a preset feedforward control unit, indicating that no adjustment will be made. In this case, the low-pressure unit control unit controls the inlet guide vanes of the low-pressure unit to prevent them from adjusting the low-pressure unit inlet flow rate. This step essentially utilizes the return circuit flow more efficiently, reduces the need for the vent valve to release the flow, improves utilization efficiency, and reduces energy consumption.

[0068] In some embodiments, after the preset feedforward control unit feeds back a signal not to adjust to the low-pressure unit control unit, the method further includes: judging through the low-pressure unit control unit whether the current inlet flow of the low-pressure unit is greater than a preset inlet flow threshold; if so, adjusting the vent valve of the low-pressure unit based on the self-adjustment mechanism of the low-pressure unit control unit to reduce the inlet flow of the high-pressure unit.

[0069] In this embodiment, the electronic device uses the low-pressure unit control unit (Gc1) to determine whether the current low-pressure unit inlet flow rate is greater than a preset inlet flow rate threshold. If the current low-pressure unit inlet flow rate is greater than the preset inlet flow rate threshold, the low-pressure unit control unit (Gc1)'s self-regulating mechanism adjusts the low-pressure unit's bleed valve (BOV) to reduce the high-pressure unit inlet flow rate. Specifically, the opening of the low-pressure unit bleed valve is increased. By adjusting the BOV opening, a portion of the outlet flow is vented, increasing the low-pressure unit's discharge flow rate, thereby reducing the high-pressure unit's inlet flow rate, thereby minimizing the impact on the high-pressure unit's operation and reducing the risk of high-pressure unit surge.

[0070] S307: Determine whether the absolute value of the current flow rate change of the return loop flow rate is greater than a preset third threshold.

[0071] In this step, the electronic device determines whether the absolute value of the flow change value of the current return circuit flow is greater than a preset third threshold. In some embodiments, the preset third threshold can be 10% of the low-pressure unit inlet flow setting value. For example, when the inlet flow setting value is 1000Nm 3 / h, the preset third threshold value is 100Nm 3 / h, and can also be set to other values ​​without specific limitation.

[0072] S308. If the absolute value of the flow change value is greater than the preset third threshold value, the flow change value is fed back to the high-pressure unit control unit through the preset feedforward control unit, and the flow value portion of the flow change value that exceeds the preset third threshold value is adjusted by the vent valve of the high-pressure unit through the high-pressure unit control unit.

[0073] In this step, if it is determined that the absolute value of the flow change value is greater than the preset third threshold value, the electronic device feeds back the flow change value to the high-pressure unit control unit through the preset feedforward control unit, and the high-pressure unit control unit adjusts the flow value portion of the flow change value that exceeds the preset third threshold value through the high-pressure unit vent valve. Figure 4As shown, the electronic device can adjust the portion of flow that exceeds the preset third threshold through the high-pressure unit's blowdown valve (BOV). When the backflow rate increases, the blowdown valve opening is increased; when the backflow rate decreases, the blowdown valve opening is decreased, thereby reducing the impact on the high-pressure unit's operation and the risk of high-pressure unit surge. Through feedforward control, the high-pressure unit can be quickly regulated based on flow changes, reducing interference with the unit, especially the impact on high-pressure unit operation, and greatly improving regulation speed.

[0074] It should be noted that the judgments in S303, S305 and S307 can be performed in parallel, without any order. After S302 is executed, S303, S305 and S307 are executed simultaneously, and then the adjustment process is performed according to the corresponding judgment results.

[0075] The embodiment of the present disclosure obtains the current return loop flow rate value of the high-pressure unit returning to the low-pressure unit, and calculates the current flow rate change value of the return loop flow rate based on the return loop flow rate value. Further, it is determined whether the absolute value of the flow change value of the current return loop flow is greater than a preset first threshold value. If the absolute value of the flow change value is greater than the preset first threshold value, the flow change value is fed back to the high-pressure unit control unit through the preset feedforward control unit, and the inlet flow of the high-pressure unit is pre-adjusted based on the flow change value by the high-pressure unit control unit; and / or, it is determined whether the absolute value of the flow change value of the current return loop flow is less than a preset second threshold value. If the absolute value of the flow change value is less than the preset second threshold value, a signal not to adjust is fed back to the low-pressure unit control unit through the preset feedforward control unit; and / or, it is determined whether the absolute value of the flow change value of the current return loop flow is greater than a preset third threshold value. If the absolute value of the flow change value is greater than the preset third threshold value, the flow change value is fed back to the high-pressure unit control unit through the preset feedforward control unit, and the part of the flow value exceeding the preset third threshold value in the flow change value is adjusted by the vent valve of the high-pressure unit through the high-pressure unit control unit. Compared with the prior art, the disclosed embodiment can provide feedback and advance control of the series units based on the flow change value of the return loop flow, thereby greatly improving the sustainability and reliability of the unit operation and preventing unit surge in advance. Through feedforward control, the high-pressure unit can be quickly regulated based on the flow change value, reducing the interference to the unit, especially the impact on the operation of the high-pressure unit, and greatly improving the adjustment speed. At the same time, since the preset feedforward control unit feeds back the signal of no adjustment to the low-pressure unit control unit, the return loop flow can be used more efficiently, reducing the emptying of the flow by the vent valve, improving utilization efficiency, and reducing energy consumption.

[0076] Figure 5This is a schematic diagram of the structure of the compressor unit control device provided in the embodiment of the present disclosure. The compressor unit control device can be the electronic device described in the above embodiment, or the compressor unit control device can be a component or assembly in the electronic device. The compressor unit control device provided in the embodiment of the present disclosure can execute the processing flow provided in the embodiment of the compressor unit control method, such as Figure 5 As shown, the compressor unit control device 40 includes: an acquisition module 41, a calculation module 42, a judgment module 43, and a control module 44; wherein the acquisition module 41 is used to obtain the return loop flow value of the current high-pressure unit returning to the low-pressure unit; the calculation module 42 is used to calculate the flow change value of the current return loop flow based on the return loop flow value; the judgment module 43 is used to judge whether the absolute value of the flow change value of the current return loop flow is greater than the preset first threshold; the control module 44 is used to feed back the flow change value to the high-pressure unit control unit through a preset feedforward control unit if the absolute value of the flow change value is greater than the preset first threshold, and pre-adjust the inlet flow of the high-pressure unit based on the high-pressure unit control unit according to the flow change value.

[0077] Optionally, when the acquisition module 41 obtains the return loop flow value of the current high-pressure unit returning to the low-pressure unit, it is specifically used to: perform real-time monitoring of the return loop flow based on the return monitoring unit to obtain the return loop flow value of the current high-pressure unit returning to the low-pressure unit.

[0078] Optionally, when the calculation module 42 calculates the flow change value of the current return loop flow based on the return loop flow value, it is specifically used to: calculate the difference between the return loop flow value and the average value of the return loop flow in the past time period, and / or calculate the difference between the return loop flow value and the return loop flow at the previous moment; and determine the difference as the flow change value of the current return loop flow.

[0079] Optionally, when the control module 44 pre-adjusts the inlet flow of the high-pressure unit according to the flow change value based on the high-pressure unit control unit, it is specifically used to: calculate the product of the flow change value and the preset proportional value, and determine the product of the flow change value and the preset proportional value as the target change value; adjust the inlet guide vanes of the high-pressure unit based on the high-pressure unit control unit in combination with the target change value to adjust the inlet flow of the high-pressure unit.

[0080] Optionally, after calculating the flow change value of the current return circuit flow, the judgment module 43 is also used to judge whether the absolute value of the flow change value of the current return circuit flow is less than a preset second threshold; the control module 44 is also used to feedback a signal of not performing adjustment to the low-pressure unit control unit through a preset feedforward control unit if the absolute value of the flow change value is less than the preset second threshold.

[0081] Optionally, after the preset feedforward control unit feeds back a signal not to adjust to the low-pressure unit control unit, the device 40 also includes: a monitoring module 45 and an adjustment module 46; the monitoring module 45 is used to determine whether the current inlet flow of the low-pressure unit is greater than a preset inlet flow threshold through the low-pressure unit control unit; the adjustment module 46 is used to adjust the vent valve of the low-pressure unit based on the self-adjustment mechanism of the low-pressure unit control unit if the current inlet flow of the low-pressure unit is greater than the preset inlet flow threshold, so as to reduce the inlet flow of the high-pressure unit.

[0082] Optionally, after calculating the flow change value of the current return circuit flow, the judgment module 43 is also used to judge whether the absolute value of the flow change value of the current return circuit flow is greater than a preset third threshold value; the control module 44 is also used to feed back the flow change value to the high-pressure unit control unit through a preset feedforward control unit if the absolute value of the flow change value is greater than the preset third threshold value, and the high-pressure unit control unit adjusts the flow value portion of the flow change value that exceeds the preset third threshold value through the vent valve of the high-pressure unit.

[0083] Figure 5 The compressor unit control device of the illustrated embodiment can be used to implement the technical solution of the above-mentioned method embodiment. Its implementation principle and technical effects are similar and will not be repeated here.

[0084] Figure 6 This is a schematic diagram of the structure of an electronic device in the embodiment of the present disclosure. Figure 6 , which shows a structural diagram of an electronic device 600 suitable for implementing the embodiments of the present disclosure. Figure 6 The electronic device shown is only an example and should not limit the functions and scope of use of the embodiments of the present disclosure.

[0085] like Figure 6 As shown, electronic device 600 may include a processing device (e.g., a central processing unit, graphics processing unit, etc.) 601, which can perform various appropriate actions and processes to implement the compressor unit control method according to a program stored in a read-only memory (ROM) 602 or a program loaded from a storage device 608 into a random access memory (RAM) 603 to implement the compressor unit control method according to the embodiments of the present disclosure. RAM 603 also stores various programs and data required for the operation of electronic device 600. Processing device 601, ROM 602, and RAM 603 are interconnected via a bus 604. An input / output (I / O) interface 605 is also connected to bus 604.

[0086] Typically, the following devices may be connected to the I / O interface 605: an input device 606 including, for example, a touch screen, a touchpad, a keyboard, a mouse, a camera, a microphone, an accelerometer, a gyroscope, etc.; an output device 607 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; a storage device 608 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 609. The communication device 609 may allow the electronic device 600 to communicate with other devices wirelessly or by wire to exchange data. Figure 6 The electronic device 600 is shown with various devices, but it should be understood that it is not required to implement or possess all of the devices shown. More or fewer devices may be implemented or possessed instead.

[0087] In particular, according to an embodiment of the present disclosure, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present disclosure includes a computer program product, which includes a computer program carried on a non-transitory computer-readable medium, and the computer program contains program code for executing the method shown in the flowchart, thereby implementing the compressor unit control method described above. In such an embodiment, the computer program can be downloaded and installed from the network via the communication device 609, or installed from the storage device 608, or installed from the ROM 602. When the computer program is executed by the processing device 601, the above-mentioned functions defined in the method of the embodiment of the present disclosure are performed.

[0088] It should be noted that the computer-readable medium described above in the present disclosure may be a computer-readable signal medium or a computer-readable storage medium, or any combination thereof. Computer-readable storage media may include, for example, but not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or components, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to, an electrical connection having one or more conductors, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In the present disclosure, a computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device. In the present disclosure, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such a propagated data signal may take a variety of forms, including, but not limited to, electromagnetic signals, optical signals, or any suitable combination thereof. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium that can transmit, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer-readable medium may be transmitted using any suitable medium, including but not limited to wire, optical cable, RF (radio frequency), or any suitable combination thereof.

[0089] In some embodiments, the client and server can communicate using any currently known or later developed network protocol, such as HTTP (HyperText Transfer Protocol), and can be interconnected with any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include a local area network ("LAN"), a wide area network ("WAN"), an internet (e.g., the Internet), and a peer-to-peer network (e.g., an ad hoc peer-to-peer network), as well as any currently known or later developed network.

[0090] The computer-readable medium may be included in the electronic device, or may exist independently without being incorporated into the electronic device.

[0091] The computer-readable medium carries one or more programs. When the one or more programs are executed by the electronic device, the electronic device: Get the return flow rate value of the current high-pressure unit returning to the low-pressure unit; Calculating a current flow change value of the return circuit flow according to the return circuit flow value; Determine whether the absolute value of the flow change value of the current return loop flow is greater than a preset first threshold; If the absolute value of the flow change value is greater than the preset first threshold, the flow change value is fed back to the high-pressure unit control unit through the preset feedforward control unit, and the high-pressure unit control unit pre-adjusts the inlet flow of the high-pressure unit according to the flow change value.

[0092] Optionally, when the above one or more programs are executed by the electronic device, the electronic device may also execute other steps described in the above embodiments.

[0093] Computer program code for performing the operations of the present disclosure may be written in one or more programming languages, or a combination thereof, including, but not limited to, object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., through the Internet using an Internet service provider).

[0094] The flowcharts and block diagrams in the accompanying drawings illustrate the possible implementation architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, program segment, or a part of code, and the module, program segment, or a part of code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order than that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, and the combination of the boxes in the block diagram and / or flowchart, can be implemented with a dedicated hardware-based system that performs the specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0095] The units involved in the embodiments described in this disclosure may be implemented in software or hardware, wherein the name of a unit does not necessarily limit the unit itself.

[0096] The functions described above herein may be performed, at least in part, by one or more hardware logic components. For example, and without limitation, exemplary types of hardware logic components that may be used include: field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), complex programmable logic devices (CPLDs), and the like.

[0097] In the context of the present disclosure, a machine-readable medium may be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, apparatus, or device. A machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of machine-readable storage media may include an electrical connection based on one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), optical fibers, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0098] The above description is merely a preferred embodiment of the present disclosure and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the present disclosure is not limited to technical solutions formed by specific combinations of the aforementioned technical features. It also encompasses other technical solutions formed by any combination of the aforementioned technical features or their equivalents, without departing from the scope of the above disclosure. For example, a technical solution formed by replacing the aforementioned features with (but not limited to) technical features with similar functions disclosed in this disclosure.

[0099] In addition, although each operation is described in a specific order, this should not be understood as requiring these operations to be performed in the specific order shown or in a sequential order. Under certain circumstances, multitasking and parallel processing may be advantageous. Similarly, although some specific implementation details have been included in the above discussion, these should not be interpreted as limiting the scope of the present disclosure. Some features described in the context of a separate embodiment can also be implemented in a single embodiment in combination. On the contrary, the various features described in the context of a single embodiment can also be implemented in multiple embodiments individually or in any suitable sub-combination mode.

[0100] Although the subject matter has been described in language specific to structural features and / or methodological logical acts, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are merely example forms of implementing the claims.

Claims

1. A compressor unit control method, characterized in that: The compressor unit includes a low-pressure unit and a high-pressure unit, and the method includes: Get the return loop flow value from the current high-pressure unit to the low-pressure unit; Calculating a flow change value of a current return loop flow according to the return loop flow value; Determine whether the absolute value of the flow change value of the current return loop flow is greater than a preset first threshold; If the absolute value of the flow change value is greater than the preset first threshold value, the flow change value is fed back to the high-pressure unit control unit through the preset feedforward control unit, and the high-pressure unit control unit pre-adjusts the inlet flow of the high-pressure unit according to the flow change value.

2. The method according to claim 1, characterized in that The step of obtaining the current return loop flow value of the high pressure unit returning to the low pressure unit includes: Based on the reflux monitoring unit, the reflux loop flow is monitored in real time to obtain the current reflux loop flow value of the high-pressure unit refluxing to the low-pressure unit.

3. The method according to claim 1, characterized in that The step of calculating the flow change value of the current return loop flow according to the return loop flow value comprises: Calculating the difference between the return loop flow value and the average value of the return loop flow in a past time period, and / or calculating the difference between the return loop flow value and the return loop flow at a previous moment; The difference is determined as the flow change value of the current return loop flow.

4. The method according to claim 1, characterized in that: The pre-adjustment of the inlet flow of the high-pressure unit based on the high-pressure unit control unit according to the flow change value includes: Calculating the product of the flow change value and the preset ratio value, and determining the product of the flow change value and the preset ratio value as the target change value; Based on the high pressure unit control unit and the target change value, the inlet guide vane of the high pressure unit is adjusted to adjust the inlet flow of the high pressure unit.

5. The method according to claim 1, characterized in that After calculating the flow change value of the current return loop flow, the method further includes: Determine whether the absolute value of the flow change value of the current return loop flow is less than a preset second threshold; If the absolute value of the flow rate change value is smaller than the preset second threshold value, a signal indicating that no adjustment is to be performed is fed back to the low-pressure unit control unit through the preset feedforward control unit.

6. The method according to claim 5, characterized in that After the preset feedforward control unit feeds back a signal not to perform regulation to the low-voltage unit control unit, the method further comprises: Determine whether the current inlet flow of the low-pressure unit is greater than a preset inlet flow threshold value by using the low-pressure unit control unit; If so, the vent valve of the low-pressure unit is adjusted based on the self-regulating mechanism of the low-pressure unit control unit to reduce the inlet flow of the high-pressure unit.

7. The method according to claim 1, characterized in that After calculating the flow change value of the current return loop flow, the method further includes: Determine whether the absolute value of the flow change value of the current return loop flow is greater than a preset third threshold; If the absolute value of the flow change value is greater than the preset third threshold value, the flow change value is fed back to the high-pressure unit control unit through the preset feedforward control unit, and the flow value portion of the flow change value that exceeds the preset third threshold value is adjusted by the vent valve of the high-pressure unit through the high-pressure unit control unit.

8. A compressor unit control device, characterized in that: The compressor unit includes a low-pressure unit and a high-pressure unit, and the device includes: An acquisition module is used to obtain the return loop flow value of the current high-pressure unit returning to the low-pressure unit; A calculation module, used to calculate a flow change value of a current return loop flow according to the return loop flow value; A judgment module, used to judge whether the absolute value of the flow change value of the current return loop flow is greater than a preset first threshold; A control module is used to feed back the flow change value to the high-pressure unit control unit through a preset feedforward control unit if the absolute value of the flow change value is greater than the preset first threshold value, and pre-adjust the inlet flow of the high-pressure unit based on the flow change value by the high-pressure unit control unit.

9. An electronic device, characterized in that: include: Memory; processor; as well as Computer programs; The computer program is stored in the memory and is configured to be executed by the processor to implement the method according to any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.

11. A computer program product, characterized in that The computer program product comprises a computer program or instructions, and when the computer program or instructions are executed by a processor, the method according to any one of claims 1 to 7 is implemented.

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