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

Abstract

The present disclosure relates to a compressor unit control method, device, equipment, medium and computer program product. By obtaining the return loop flow value of the current high-pressure unit returning to the low-pressure unit, the flow change value of the current return loop flow is calculated according to the return loop flow value, and it is determined whether the absolute value of the flow change value is greater than the 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 to reduce the occurrence of surge. Compared with the prior art, the embodiment of the present disclosure can feedback and advance control the series units according to the flow change value of the return loop flow, so that the sustainability and reliability of the unit operation are greatly improved, and the unit surge 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 pressurizing equipment. Surge is an inherent characteristic of centrifugal compressors. When the compressor flow rate decreases or the pressure difference increases, the centrifugal compressor is prone to surge, which affects the normal operation of the centrifugal compressor. Therefore, anti-surge control and performance control are the core issues of compressor control.

[0003] At present, the anti-surge technology for a single centrifugal compressor 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 difficulty of the series unit is greatly increased. 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 technology, cascade feedback control is mostly used for series-connected units, that is, the low-pressure unit is controlled in turn to the high-pressure unit. The control is often 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 regulation, and the unit surge often occurs in an instant. And for the unit regulation, in order to prevent excessive pressure fluctuations, rapid adjustment is generally avoided to prevent pressure fluctuations caused by excessive adjustment speed, which makes it inevitable to produce adjustment lags in some cases, and the anti-surge effect is not good. 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:

[0007] Get the return loop flow value from the current high-pressure unit to the low-pressure unit;

[0008] Calculating a flow change value of a current return loop flow according to the return loop flow value;

[0009] Determine whether the absolute value of the flow change value of the current return loop flow is greater than a preset first threshold;

[0010] 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.

[0011] In some embodiments, obtaining the current return loop flow value of the high pressure unit returning to the low pressure unit includes:

[0012] 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.

[0013] In some embodiments, the flow change value of the current return loop flow is calculated according to the return loop flow value, including:

[0014] 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;

[0015] The difference is determined as the flow change value of the current return loop flow.

[0016] In some embodiments, 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:

[0017] 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;

[0018] 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.

[0019] In some embodiments, after calculating the flow change value of the current return loop flow, the method further includes:

[0020] Determine whether the absolute value of the flow change value of the current return loop flow is less than a preset second threshold;

[0021] 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.

[0022] In some embodiments, after the preset feedforward control unit feeds back a signal not to perform regulation to the low-voltage unit control unit, the method further includes:

[0023] 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;

[0024] 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.

[0025] In some embodiments, after calculating the flow change value of the current return loop flow, the method further includes:

[0026] Determine whether the absolute value of the flow change value of the current return loop flow is greater than a preset third threshold;

[0027] 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.

[0028] 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:

[0029] An acquisition module is used to obtain the return loop flow value of the current high-pressure unit returning to the low-pressure unit;

[0030] A calculation module, used for calculating a flow change value of a current return loop flow according to the return loop flow value;

[0031] 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;

[0032] 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.

[0033] In a third aspect, an embodiment of the present disclosure provides an electronic device, including:

[0034] Memory;

[0035] Processor; and

[0036] Computer programs;

[0037] 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.

[0038] 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.

[0039] 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, the method described in the first aspect is implemented.

[0040] The compressor unit control method, device, equipment, medium and computer program product provided by the embodiments of the present disclosure obtain the return loop flow value of the current high-pressure unit returning to the low-pressure unit, calculate the flow change value of the current return loop flow according to the return loop flow value, and judge whether the absolute value of the flow change value of the current return loop flow is greater than the 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 high-pressure unit control unit according to the flow 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 feedback and advance control the series unit according to the calculated flow change value of the return loop flow, so that the sustainability and reliability of the unit operation are greatly improved, and the unit surge can be prevented in advance. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] 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.

[0042] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0043] Figure 1 A flow chart of a compressor unit control method provided by an embodiment of the present disclosure;

[0044] Figure 2 A flow chart of a compressor unit control method provided by another embodiment of the present disclosure;

[0045] Figure 3A flow chart of a compressor unit control method provided by another embodiment of the present disclosure;

[0046] Figure 4 A schematic diagram of the overall architecture of a compressor unit provided in an embodiment of the present disclosure;

[0047] Figure 5 A schematic diagram of the structure of a compressor unit control device provided in an embodiment of the present disclosure;

[0048] Figure 6 A schematic diagram of the structure of an electronic device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0049] 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 in the embodiments can be combined with each other without conflict.

[0050] 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.

[0051] Centrifugal compressors are commonly used gas pressurizing equipment. Surge is an inherent characteristic of centrifugal compressors. When the compressor flow rate decreases or the pressure difference increases, the centrifugal compressor is prone to surge, which affects the normal operation of the centrifugal compressor. Therefore, anti-surge control and performance control are the core issues of compressor control.

[0052] At present, the anti-surge technology for a single centrifugal compressor 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 difficulty of the series unit is greatly increased. 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.

[0053] In the related technology, cascade feedback control is mostly used for series-connected units, that is, the low-pressure unit is controlled in turn to the high-pressure unit. The control is often 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 regulation, and the unit surge often occurs in an instant. And for the unit regulation, in order to prevent excessive pressure fluctuations, rapid adjustment is generally avoided to prevent pressure fluctuations caused by excessive adjustment speed, which makes it inevitable to produce adjustment lags in some cases, and the anti-surge effect is not good.

[0054] 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 a specific embodiment.

[0055] Figure 1 A flow chart of a compressor unit control method provided in an embodiment of the present disclosure. The execution subject of the method is an electronic device. The method can be applied to a scenario of controlling a compressor unit, and can also be applied to a scenario of preventing a compressor unit from surging. It can be understood that the compressor unit control method provided in an embodiment of the present disclosure can also be applied in other scenarios.

[0056] Below Figure 1 The compressor unit control method shown in the figure is introduced, and the specific steps of the method are as follows:

[0057] S101, obtaining the current return loop flow value of the high-pressure unit returning to the low-pressure unit.

[0058] In this step, the electronic device obtains the return loop flow value of the current high-pressure unit returning to the low-pressure unit. Optionally, the electronic device can monitor the return loop flow to obtain the return loop flow value. The return loop flow refers to Figure 4 The flow rate shown is the flow from the high-pressure unit outlet back to the low-pressure unit inlet.

[0059] S102: Calculate a flow change value of a current return loop flow according to the return loop flow value.

[0060] In this step, the electronic device can calculate the flow change value of the current return loop flow according to the return loop flow value. In some embodiments, the electronic device calculates the difference between the return loop flow value and the average value of the return loop flow in the past time period, which is the flow change value of the current return loop flow. The past time period can be within the past 30 seconds, within the past minute, or within the past three minutes, without specific limitation.

[0061] In other embodiments, the electronic device can also calculate the flow change value of the current return loop flow according to the current return loop flow value and the return loop flow value at the previous moment. The difference between the current return loop flow value and the return loop flow value at the previous moment is calculated as the flow change value of the current return loop flow.

[0062] S103: Determine whether the absolute value of the flow change value of the current return loop flow is greater than a preset first threshold.

[0063] In this step, the electronic device determines whether the absolute value of the flow change value of the current return loop 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.

[0064] 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.

[0065] In this step, if it is determined that the absolute value of the flow change value is greater than the preset first threshold, Figure 4 The 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.

[0066] 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 regulating unit, SV3 is the high-pressure unit inlet flow regulating unit, SV2 is the low-pressure unit outlet flow regulating unit, and SV4 is the high-pressure unit outlet flow regulating unit. FOV is a reflux monitoring unit, which is used to monitor the flow value of the high-pressure unit outlet reflux to the low-pressure unit inlet. Among them, SV1 and SV3 can adjust the inlet guide vane (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 valve (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.

[0067] For high-pressure units, the outlet flow of the high-pressure units can be divided into three parts, namely the emptying part of the high-pressure unit vent valve, the part flowing to use or the next level, and the reflux part.

[0068] The disclosed embodiment 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 the 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 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 disclosed embodiment can monitor the return loop flow value of the high-pressure unit returning to the low-pressure unit, and further feedback and advance control 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.

[0069] Figure 2 A flow chart of a compressor unit control method provided in 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:

[0070] S201. Perform real-time monitoring of the return loop flow rate based on the return monitoring unit to obtain the return loop flow rate value of the current high-pressure unit returning to the low-pressure unit.

[0071] 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.

[0072] 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.

[0073] In this step, after obtaining the return loop flow value of the current high-pressure unit returning to the low-pressure unit, the electronic device can calculate the difference between the return loop flow value and the average 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. For example, the return loop flow value is 130Nm 3 / h, the average return flow rate in the past period is 100Nm 3 / h, the difference between the return loop flow value and the average value of the return loop flow is calculated to be 130-100=30Nm 3 For another example, the return loop flow value is 130Nm3 / h, and the return loop flow value at the previous moment is 100Nm3 / h. The difference between the current return loop flow value and the return loop flow value at the previous moment is calculated to be 130-100=30Nm3 / h.

[0074] S203: Determine the difference as the flow change value of the current return loop flow.

[0075] After calculating the difference, the electronic device determines the difference as the flow change value of the current return loop flow. Specifically, for the two differences calculated by the two methods, either difference can be taken as the flow change value of the current return loop flow, or the two differences can be averaged and the average value of the two can be taken as the flow change value of the current return loop flow. For example, 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.

[0076] 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 value.

[0077] Specifically, the implementation process and principle of S204 and S103 are the same, and will not be repeated here.

[0078] S205: 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-voltage unit control unit through a preset feedforward control unit.

[0079] In this step, if the electronic device determines that 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-voltage unit control unit through the preset feedforward control unit. 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 is convenient for rapid control of the flow change value, greatly improving the sustainability and reliability of the unit operation, and preventing unit surge in advance.

[0080] 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.

[0081] 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 / h. 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 decay due to loss, so only the flow change value of the preset proportional value needs to be adjusted.

[0082] S207: 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.

[0083] In this step, the electronic device adjusts the inlet guide vane of the high-pressure unit through the high-pressure unit control unit in combination with the target change value to adjust the inlet flow of the high-pressure unit. Figure 4 As shown in the figure, the electronic equipment can adjust the opening of the inlet guide vane (IGV) of the high-pressure unit, adjust the inlet flow of the high-pressure unit, and thus reduce the impact on the operation of the high-pressure unit and reduce the risk of surge of the high-pressure unit. Through the feedforward control method, the high-pressure unit can be quickly regulated according to 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.

[0084] The embodiment of the present disclosure monitors 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, calculates the difference between the return loop flow value and the average value of the return loop flow in the past time period, and / or calculates the difference between the return loop flow value and the return loop flow at the previous moment, and determines the difference as the flow change value of the current return loop flow. Further, it is determined whether the absolute value of the flow change value of the current return loop flow is greater than the 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. Then, the product of the flow change value and the preset proportional value is calculated, and the product of the flow change value and the preset proportional value is determined as the target change value. Based on the high-pressure unit control unit, the inlet guide vane of the high-pressure unit is adjusted in combination with the target change value to adjust the inlet flow of the high-pressure unit. Compared with the prior art, the disclosed embodiment 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 according to the calculated flow change value of the return loop flow, so that the sustainability and reliability of the unit operation are greatly improved, and the unit surge can be prevented in advance. Through feedforward control, the high-pressure unit can be quickly regulated according to 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.

[0085] Figure 3 A flow chart of a compressor unit control method provided in 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:

[0086] S301, obtaining the current return loop flow value of the high-pressure unit returning to the low-pressure unit.

[0087] Specifically, the implementation process and principle of S301 and S101 are the same, and will not be repeated here.

[0088] S302: Calculate the flow change value of the current return loop flow according to the return loop flow value.

[0089] Specifically, the implementation process and principle of S302 and S102 are the same, and will not be repeated here.

[0090] S303: Determine whether the absolute value of the flow change value of the current return loop flow is greater than a preset first threshold.

[0091] Specifically, the implementation process and principle of S303 and S103 are the same, and will not be repeated here.

[0092] 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.

[0093] Specifically, the implementation process and principle of S304 and S104 are the same, and will not be repeated here.

[0094] 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 value.

[0095] In this step, the electronic device determines whether the absolute value of the flow change value of the current return loop 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.

[0096] 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.

[0097] 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 a preset feedforward control unit.

[0098] Furthermore, if the electronic device determines that the absolute value of the flow change value is less than the preset second threshold value, it feeds back a signal not to adjust to the low-pressure unit control unit through the preset feedforward control unit. At this time, the low-pressure unit control unit controls the inlet guide vane of the low-pressure unit not to adjust the inlet flow of the low-pressure unit. The essence of this step is to more efficiently utilize the return circuit flow, reduce the emptying of the flow by the vent valve, improve utilization efficiency, and reduce energy consumption.

[0099] 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.

[0100] In this embodiment, the electronic device determines whether the current inlet flow of the low-pressure unit is greater than the preset inlet flow threshold through the low-pressure unit control unit (Gc1). If the current inlet flow of the low-pressure unit is greater than the preset inlet flow threshold, the vent valve (BOV) of the low-pressure unit is adjusted through the self-regulation mechanism of the low-pressure unit control unit (Gc1) to reduce the inlet flow of the high-pressure unit. Specifically, the opening of the vent valve of the low-pressure unit is increased, and a part of the outlet flow is emptied by adjusting the BOV opening, increasing the flow discharged by the low-pressure unit, thereby reducing the inlet flow of the high-pressure unit, thereby reducing the impact on the operation of the high-pressure unit and reducing the risk of surge of the high-pressure unit.

[0101] S307: Determine whether the absolute value of the current flow rate change value of the return loop flow rate is greater than a preset third threshold value.

[0102] In this step, the electronic device determines whether the absolute value of the flow change value of the current return loop flow is greater than the preset third threshold value. In some embodiments, the preset third threshold value 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.

[0103] 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.

[0104] 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 vent valve of the high-pressure unit. Figure 4 As shown, the electronic device can adjust the flow value that exceeds the preset third threshold value through the bleed valve (BOV) of the high-pressure unit. When the reflux volume increases, the bleed valve opening is increased; when the reflux volume decreases, the bleed valve opening is reduced, thereby reducing the impact on the operation of the high-pressure unit and reducing the risk of surge of the high-pressure unit. Through the feedforward control method, the high-pressure unit can be quickly regulated according to the flow change value, reducing the interference of the unit, especially the impact on the operation of the high-pressure unit, and greatly improving the adjustment speed.

[0105] 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.

[0106] The disclosed embodiment obtains the return loop flow value of the current high-pressure unit returning to the low-pressure unit, and calculates the current flow change value of the return loop flow according to the return loop flow 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 a 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 a 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 a preset feedforward control unit, and the part of the flow value in 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. Compared with the prior art, the disclosed embodiment can provide feedback and advance control of the series units according to the flow change value of the return loop flow, so that the sustainability and reliability of the unit operation are greatly improved, and the unit surge can be prevented in advance. Through feedforward control, the high-pressure unit can be quickly regulated according to 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, because 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 venting of the flow by the vent valve, improving the utilization efficiency, and reducing energy consumption.

[0107] Figure 5 Schematic diagram of the structure of the compressor unit control device provided in the embodiment of the present disclosure. The compressor unit control device may be the electronic device as described in the above embodiment, or the compressor unit control device may be a component or assembly in the electronic device. The compressor unit control device provided in the embodiment of the present disclosure may execute the processing flow provided in the compressor unit control method embodiment, such as Figure 5As 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 according to 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 a 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.

[0108] Optionally, when the acquisition module 41 acquires 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.

[0109] 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 a 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.

[0110] 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 a preset proportional value, and determine the product of the flow change value and the preset proportional value as a 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.

[0111] 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 value; 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 value.

[0112] 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 to reduce the inlet flow of the high-pressure unit if the current inlet flow of the low-pressure unit is greater than the preset inlet flow threshold.

[0113] 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 feedback 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.

[0114] Figure 5 The compressor unit control device of the illustrated embodiment can be used to execute the technical solution of the above-mentioned method embodiment, and its implementation principle and technical effect are similar, which will not be repeated here.

[0115] Figure 6 Schematic diagram of the structure of an electronic device in the embodiment of the present disclosure. Figure 6 , which shows a structural schematic 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 bring any limitation to the functions and scope of use of the embodiments of the present disclosure.

[0116] like Figure 6 As shown, the electronic device 600 may include a processing device (e.g., a central processing unit, a graphics processing unit, etc.) 601, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 602 or a program loaded from a storage device 608 to a random access memory (RAM) 603 to implement the compressor unit control method of the embodiment described in the present disclosure. In the RAM 603, various programs and data required for the operation of the electronic device 600 are also stored. The processing device 601, the ROM 602, and the RAM 603 are connected to each other via a bus 604. An input / output (I / O) interface 605 is also connected to the bus 604.

[0117] Typically, the following devices may be connected to the I / O interface 605: an input device 606 including, for example, a touch screen, a touch pad, 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. Although 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 the devices shown. More or fewer devices may be implemented or possessed instead.

[0118] 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 a program code for executing the method shown in the flowchart, thereby implementing the compressor unit control method as described above. In such an embodiment, the computer program can be downloaded and installed from the network through 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 executed.

[0119] It should be noted that the computer-readable medium mentioned above in the present disclosure may be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with 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), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. 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 combination with an instruction execution system, device or device. In the present disclosure, a computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier wave, which carries a computer-readable program code. This propagated data signal may take a variety of forms, including but not limited to an electromagnetic signal, an optical signal, or any suitable combination of the above. Computer readable signal media may also be any computer readable medium other than computer readable storage media, which may send, propagate or transmit a program for use by or in conjunction with an instruction execution system, apparatus or device. The program code contained on the computer readable medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (radio frequency), etc., or any suitable combination of the above.

[0120] In some embodiments, the client and the server may communicate using any currently known or future developed network protocol such as HTTP (HyperText Transfer Protocol), and may 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 future developed network.

[0121] The computer-readable medium may be included in the electronic device, or may exist independently without being incorporated into the electronic device.

[0122] The computer-readable medium carries one or more programs. When the one or more programs are executed by the electronic device, the electronic device:

[0123] Get the return loop flow value from the current high-pressure unit to the low-pressure unit;

[0124] Calculating a flow change value of a current return loop flow according to the return loop flow value;

[0125] Determine whether the absolute value of the flow change value of the current return loop flow is greater than a preset first threshold;

[0126] 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.

[0127] 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.

[0128] 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 separate 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., via the Internet using an Internet service provider).

[0129] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present disclosure. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some implementations as replacements, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square 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 square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart 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.

[0130] The units involved in the embodiments described in the present disclosure may be implemented by software or hardware, wherein the name of a unit does not, in some cases, limit the unit itself.

[0131] The functions described above herein may be performed at least in part by one or more hardware logic components. For example, 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.

[0132] 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, device, or equipment. 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, device, or device, or any suitable combination of the foregoing. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, 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), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0133] The above description is only a preferred embodiment of the present disclosure and an explanation of the technical principles used. Those skilled in the art should understand that the scope of disclosure involved in the present disclosure is not limited to the technical solutions formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above disclosed concept. For example, the above features are replaced with the technical features with similar functions disclosed in the present disclosure (but not limited to) by each other to form a technical solution.

[0134] 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 are 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.

[0135] Although the subject matter has been described in language specific to structural features and / or methodological logical actions, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. On the contrary, the specific features and actions 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 for calculating 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.

Images