Control Method and System for Compressor Test

Abstract

The present invention discloses a control method for a compressor test, including: when it is detected that the test piece of the compressor surges, a first anti-surge command is triggered, and this first anti-surge command causes the exhaust valve of the test piece to open to a first target valve position and keeps the speed of the test piece unchanged; if it is detected again that the test piece surges after executing the first anti-surge command, an emergency speed reduction to idle EBI command is triggered, and this EBI command causes the speed of the test piece to be reduced at a preset rate. Wherein, when it is detected that the test piece surges during the execution of the EBI command and a second anti-surge command is triggered, this second anti-surge command causes the exhaust valve of the test piece to open at least to a second target valve position and the speed of the test piece continues to be reduced at the preset rate.

Description

Technical Field

[0001] The present invention relates to the technical field of aero-engine compressor test, and particularly relates to a control method and system for compressor test. Background Art

[0002] In order to obtain the maximum stable boundary of the high-pressure compressor of an aero-engine, a special anti-surge test will be carried out. The test bench should respond quickly and execute the anti-surge operation at the moment of entering surge to ensure the safety of the test piece. The conventional safety protection logic of the compressor test bench is mainly based on risk control under a single mapping relationship, and is only applicable to the test of low-load and low-pressure ratio compressors. However, there are control blind spots or even serious logical conflicts for the explosive and overlapping complex risk working conditions of the high-pressure compressor components of civil aero-engines. When the test piece enters surge at a high speed and in depth, the anti-surge command will be triggered continuously for multiple times, while the rotational speed remains unchanged, and it is impossible to effectively anti-surge within the required time (usually required within 0.5 seconds) only by opening the exhaust valve.

[0003] The valve position of the compressor test piece after multiple anti-surge commands is generally greater than the original mechanical operation safety valve position (that is, the valve position of the EBI (Emergency Back To Idle) with-rotation valve position table). At this time, when the EBI command is executed, the valve will execute a gradually closing command, and the rotational speed remains unchanged again, which will probably cause overlapping surge again. That is, the phenomenon that the anti-surge command and the EBI command compete for control of the controlled objects such as the exhaust valve and the rotational speed under complex working conditions is particularly obvious. Repeatedly staying in the deep surge state for a long time will cause phenomena such as blade fracture, seriously affecting the operation safety of the test piece.

[0004] Aiming at the deficiencies of the conventional anti-surge control method, it is desirable to provide an improved control method and system for compressor test. Summary of the Invention

[0005] The following presents a brief overview of one or more aspects to provide a basic understanding of these aspects. This overview is not an exhaustive survey of all contemplated aspects, and is neither intended to identify key or decisive elements of all aspects nor to attempt to define the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that follows.

[0006] The present invention provides a control method for a compressor test, including: when detecting that a test piece of the compressor surges, triggering a first anti-surge command, which opens the exhaust valve of the test piece to a first target valve position and keeps the speed of the test piece unchanged; if it is detected again that the test piece surges after executing the first anti-surge command, triggering an emergency speed reduction to idle EBI command, and this EBI command reduces the speed of the test piece at a preset rate. Wherein, when it is detected that the test piece surges during the execution of the EBI command and a second anti-surge command is triggered, this second anti-surge command opens the exhaust valve of the test piece to at least a second target valve position and the speed of the test piece continues to be reduced at the preset rate.

[0007] In some embodiments, the method further includes: determining whether the valve follow-up control function is enabled after triggering the EBI command, where the valve follow-up control function means that the valve position of the exhaust valve changes with the speed of the test piece; and if it is determined that the valve follow-up control function is enabled, then during the execution of the EBI command, the exhaust valve is opened to the valve position corresponding to the speed in the EBI valve follow-up table.

[0008] In some embodiments, if it is determined that the valve follow-up control function is enabled, and it is detected that the test piece surges during the execution of the EBI command and a second anti-surge command is triggered, then the exhaust valve is opened to the MAX valve position, and the MAX valve position represents the maximum value between the valve position corresponding to the speed in the EBI follow-up valve position table and the second target valve position.

[0009] In some embodiments, if it is determined that the valve follow-up control function is disabled, then the valve position of the exhaust valve is maintained during the execution of the EBI command.

[0010] In some embodiments, if a specified valve position is received from an instruction with a higher authority ratio than the EBI command during the execution of the EBI command, the exhaust valve is opened to the specified valve position.

[0011] In some embodiments, when the valve position of the exhaust valve is greater than or equal to the target valve position of the anti-surge command or reaches the high limit position of the exhaust valve, the corresponding anti-surge command is automatically cancelled; or when the speed of the test piece reaches the idle speed or a command to cancel the EBI command is received, the EBI command is automatically cancelled.

[0012] In some embodiments, the exhaust valve includes an independently controllable main regulating valve and a fine regulating valve, and wherein, when the valve positions of both the main regulating valve and the fine regulating valve are greater than or equal to the target valve position of the anti-surge command or reach the high limit positions of the corresponding valves, the corresponding anti-surge command is automatically cancelled.

[0013] The present invention also provides a control system for a compressor test, including: a surge detection module configured to detect whether surge occurs in the test piece of the compressor; a surge elimination module configured to, when the surge detection module detects that surge occurs in the test piece, trigger a first anti-surge command, where the first anti-surge command opens the exhaust valve of the test piece to a first target valve position and keeps the rotational speed of the test piece unchanged; and if the surge detection module detects again that surge occurs in the test piece after executing the first anti-surge command, trigger an emergency speed reduction to idle EBI command, where the EBI command reduces the rotational speed of the test piece at a preset rate. Among them, when surge occurs in the test piece and the second anti-surge command is triggered during the execution of the EBI command, the second anti-surge command opens the exhaust valve of the test piece to at least a second target valve position and the rotational speed of the test piece continues to be reduced at the preset rate.

[0014] In some embodiments, the system further includes a valve rotation following control module configured to enable or disable the valve rotation following control function, where the valve rotation following control function means that the valve position of the exhaust valve changes with the rotational speed of the test piece; and among them, the surge elimination module is further configured to: if the valve rotation following control function is enabled, during the execution of the EBI command, open the exhaust valve to the valve position corresponding to the rotational speed in the EBI valve position rotation following table.

[0015] In some embodiments, the surge elimination module is further configured to: if the valve rotation following control function is enabled, and surge occurs in the test piece and the second anti-surge command is triggered during the execution of the EBI command, open the exhaust valve to the MAX valve position, where the MAX valve position represents the maximum value between the valve position corresponding to the rotational speed in the EBI rotation following valve position table and the second target valve position.

[0016] In some embodiments, the surge elimination module is further configured to: if the valve rotation following control function is disabled, keep the valve position of the exhaust valve during the execution of the EBI command.

[0017] In some embodiments, the surge elimination module is further configured to: if a specified valve position is received from an instruction with a higher authority ratio than the EBI command during the execution of the EBI command, open the exhaust valve to the specified valve position.

[0018] In some embodiments, the system further includes an instruction cancellation module configured to: when the valve position of the exhaust valve is greater than or equal to the target valve position of the anti-surge command or reaches the high limit position of the exhaust valve, automatically cancel the corresponding anti-surge command; or when the rotational speed of the test piece reaches the idle speed or a command to cancel the EBI command is received, automatically cancel the EBI command.

[0019] In some embodiments, the exhaust valve includes an independently controllable main regulating valve and a fine regulating valve, and wherein the command cancellation module is further configured to: automatically cancel the corresponding anti-surge command when the valve positions of both the main regulating valve and the fine regulating valve are greater than or equal to the target valve position of the anti-surge command or reach the high limit positions of the corresponding valves.

[0020] The present invention also provides a computer-readable storage medium storing a computer program for controlling a compressor test, and the computer program can be executed by a processor to execute the foregoing control method for a compressor test.

[0021] The technical solution of the present disclosure triggers the anti-surge command again during the EBI process, and the rotation speed will continue to decrease. By moving the test piece away from the high-speed state, effective anti-surge can be achieved. In addition, when the anti-surge command is triggered again during the EBI process, the exhaust valve is opened to the MAX valve position, effectively solving the problem of unexpected re-surging caused by the operation of the exhaust valve position. At the same time, it avoids entering unstable working conditions such as stall due to the excessive opening of the valve in conventional tests, and can quickly restore the test state after anti-surge is completed, saving test costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] When understanding the following detailed description in conjunction with the accompanying drawings, the features, essence and advantages of the present invention will become more obvious. In the drawings, the same reference numerals are always correspondingly marked. Note that the described drawings are illustrative and non-limiting. In the drawings, the sizes of some components may be enlarged and not drawn to scale for illustrative purposes.

[0023] Figure 1 A flowchart showing an exemplary control method for a compressor test according to the present invention is shown.

[0024] Figure 2 A flowchart showing another exemplary control method for a compressor test according to the present invention is shown.

[0025] Figure 3 A control flowchart of the EBI command according to the present invention is shown.

[0026] Figure 4 A control flowchart of the anti-surge command according to the present invention is shown.

[0027] Figure 5 An exemplary control timing of the exhaust valve according to the present invention is shown.

[0028] Figure 6 An exemplary implementation device of the control method for a compressor test according to the present invention is shown.

[0029] Figure 7 A control system for a compressor test according to the present invention is shown. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the following further elaborates on the present invention in detail with reference to specific embodiments and the accompanying drawings. In the following detailed description, numerous specific details are set forth to provide a thorough understanding of the described exemplary embodiments. However, it will be apparent to those skilled in the art that some or all of these specific details may be practiced without these specific details. In other exemplary embodiments, well-known structures are not described in detail to avoid unnecessarily obscuring the concepts of the present disclosure. It should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention. At the same time, various aspects described in the embodiments can be combined arbitrarily without conflict.

[0031] The high-pressure compressor components of civil aviation engines have explosive and overlapping complex risk operating conditions. When the test piece is in deep surge at high speed, conventional anti-surge control methods cannot achieve effective anti-surge within the required time. In addition, the phenomenon of competing for control of controlled objects such as exhaust valves and rotational speeds by anti-surge commands and EBI commands is particularly obvious under complex operating conditions, seriously affecting the operating safety of the test piece.

[0032] The present invention provides an improved control method and system for compressor tests, which solves the deficiencies of conventional control methods and achieves rapid and effective anti-surge.

[0033] Figure 1 Figure 100 shows a flowchart of an exemplary control method for compressor tests according to the present invention.

[0034] In the preparation stage before the test, the state of the test piece of the compressor is preset at 102. For example, the EBI valve position with rotation table can be set, the preset opening of the anti-surge command (the anti-surge command makes the valve position of the valve open additionally by this preset opening) can be set, whether the "valve control function with rotation" is enabled can be set, and so on. The above items can be preset before the test or can be changed at any time during the test and take effect immediately.

[0035] At 104, the test piece is made to surge. For example, the test piece can be made to surge by closing the valve position of the valve.

[0036] At 106, a first anti-surge command is triggered. For example, the first anti-surge command can be triggered manually or automatically when the test piece surges. The first anti-surge command opens the exhaust valve of the compressor to a first target valve position and keeps the rotational speed of the test piece unchanged, where the first target valve position represents the valve position of the exhaust valve at the moment when the first anti-surge command is triggered plus the preset opening of the first anti-surge command.

[0037] In an exemplary implementation, the exhaust valve includes a main regulating valve and a fine regulating valve, both of which can be independently controlled. For example, the target valve position for a single valve can be input through a human-machine interface, the valve opening can be increased or decreased using a keypad panel, and the preset opening for a surge relief instruction can be set, etc.

[0038] At 108, it is determined whether a surge is detected in the test piece. For example, a dedicated surge detection module can be used to detect whether a surge occurs in the test piece.

[0039] If no surge is detected in the test piece within a threshold time (e.g., 10 seconds), it is determined that the surge has been eliminated, and the method ends.

[0040] If a surge is detected in the test piece within the threshold time, an EBI instruction (110) is automatically triggered. The EBI instruction causes the rotational speed of the test piece to decrease at a preset rate (112).

[0041] After 112, if no surge is detected in the test piece within the threshold time (at 114, "no"), it is determined that the surge has been eliminated, and the method ends.

[0042] After 112, if a surge is detected in the test piece within the threshold time (at 114, "yes"), a second surge relief instruction (116) is triggered. The second surge relief instruction causes the exhaust valve of the compressor to open at least to a second target valve position, where the second target valve position represents the valve position of the exhaust valve when the second surge relief instruction is triggered plus the preset opening of the second surge relief instruction. At this time, the rotational speed of the test piece continues to decrease at a preset rate (118).

[0043] In some embodiments, for example, the preset opening of the first surge relief instruction may be the same as the preset opening of the second surge relief instruction. In other embodiments, the preset opening of the first surge relief instruction may be different from the preset opening of the second surge relief instruction.

[0044] After 118, if a surge is detected in the test piece within the threshold time (at 120, "yes"), the method returns to 112 and continues to execute.

[0045] After 118, if no surge is detected in the test piece within the threshold time (at 120, "no"), it is determined that the surge has been eliminated, and the method ends.

[0046] During the execution of the EBI instruction in the above control method of the present invention, if a surge relief instruction is triggered again, the rotational speed continues to decrease, causing the test piece to move away from the high rotational speed state, thereby achieving effective surge relief.

[0047] Figure 2 Flowchart 200 shows another exemplary control method of the present invention for compressor testing.

[0048] In the preparation stage before the test, the states of 202 compressor test pieces are preset. For example, the EBI valve position follow-up table can be set, the preset opening of the anti-surge command can be set, whether the "valve position follow-up control function" is enabled can be set, and so on. The above items can be preset before the experiment or changed at any time during the test and take effect immediately.

[0049] At 204, make the test piece enter surge. For example, the valve position of the valve can be closed to make the test piece enter surge.

[0050] At 206, trigger the first anti-surge command. For example, the first anti-surge command can be triggered manually or automatically when the test piece enters surge. The first anti-surge command opens the exhaust valve of the compressor to the first target valve position and keeps the speed of the test piece unchanged, where the first target valve position represents the valve position of the exhaust valve when the first anti-surge command is triggered plus the preset opening of the first anti-surge command.

[0051] In an exemplary implementation, the exhaust valve includes a main control valve and a fine control valve, and the two can be independently controlled. For example, the target valve position for a single valve can be input through the human-machine interface, the valve opening can be increased or decreased on the key panel, the preset opening of the anti-surge command, and so on.

[0052] At 208, determine whether it is detected that the test piece has surge. For example, a dedicated surge detection module can be used to detect whether there is surge.

[0053] If it is not detected that the test piece has surge within the threshold time (for example, 10 seconds), it is determined that the surge has been eliminated, and the method ends.

[0054] If it is detected that the test piece has surge within the threshold time, the EBI command (210) is automatically triggered. The EBI command reduces the speed of the test piece at a preset rate.

[0055] At 212, determine whether the valve position follow-up control function is enabled. The valve position follow-up control function means that the valve position of the exhaust valve changes with the speed of the test piece.

[0056] If the valve position follow-up control function is enabled, during the execution of the EBI command, the exhaust valve opens to the valve position corresponding to the speed in the EBI valve position follow-up table, and the speed of the test piece continues to be reduced at a preset rate (214). The EBI valve position follow-up table indicates the corresponding relationship between the valve position of the exhaust valve and the speed of the test piece. Specifically, when the speed decreases, the valve position of the exhaust valve increases.

[0057] If the valve follow - rotation control function is enabled and surge (216) of the test piece is detected again during the execution of the EBI instruction, a second anti - surge instruction (218) is triggered. At this time, the exhaust valve opens to the MAX valve position, and the speed of the test piece continues to decrease at a preset rate (220).

[0058] After 220, if surge of the test piece is detected within the threshold time (yes at 224), the method returns to 212 and continues to execute. If surge of the test piece is not detected within the threshold time (no at 224), it is determined that the surge has been eliminated, and the method ends.

[0059] If the valve follow - rotation control function is disabled, the valve position of the exhaust valve remains unchanged during the execution of the EBI instruction, and the speed of the test piece continues to decrease at a preset rate (222). However, if a specified valve position is received from an instruction with higher authority than the EBI instruction during the execution of the EBI instruction (for example, by manually intervening to input a specified valve position), the exhaust valve opens to this specified valve position.

[0060] After 222, if surge of the test piece is detected within the threshold time (yes at 224), the method returns to 212 and continues to execute. If no surge is detected within the threshold time (no at 224), it is determined that the surge has been eliminated, and the method ends.

[0061] During the execution of the EBI instruction in the above - mentioned control method of the present invention, if the anti - surge instruction is triggered again, the speed continuously decreases, moving the test piece away from the high - speed state, thus achieving effective anti - surge; at the same time, the exhaust valve position is opened to the MAX valve position, effectively solving the problem of unexpected re - surge caused by the operation of the exhaust valve position, and avoiding unstable working conditions such as stalling due to the excessive opening of the valve. Moreover, after the anti - surge is completed, the test state can be restored quickly, which is beneficial to reducing the test operation risk.

[0062] Figure 3 The control flow chart 300 of the EBI instruction of the present invention is shown.

[0063] The present invention defines the activation and de - activation conditions of the EBI instruction and the anti - surge instruction. Specifically, the EBI instruction and / or the anti - surge instruction can be automatically activated or de - activated by the control system based on meeting specific conditions, or can be manually activated or de - activated by manual intervention. In the present invention, manual intervention has the highest authority, which enhances the controllability of key equipment.

[0064] As Figure 3 shown, when the EBI instruction is first triggered (for example Figure 6When the current rotational speed > the idle speed (Yes at 302), the EBI command becomes effective (304). In various embodiments of the present invention, the EBI command can be automatically triggered (for example, when surge of the test piece is detected again after executing the first anti-surge command, the EBI command is automatically triggered by the control system, as shown in 206 - 210 of Figure 2 ), or the EBI command can be manually triggered (for example, by manually pressing the EBI button (such as the EBI button 601 in Figure 6 )). The EBI button can be a single-contact switch and is accompanied by an LED indicator light. Pressing the EBI button for the first time makes the EBI command effective, and the LED indicator light turns on; pressing the EBI button again makes the EBI command cancelled, and the LED indicator light turns off.

[0065] When the EBI command becomes effective, the EBI command is executed. Specifically, executing the EBI command causes the rotational speed of the test piece to decrease at a preset rate (306). Additionally, automatic control of the adjustable stator vanes with rotation and automatic control of the bleed air rate with rotation can also be configured as needed (308). The configuration options for the adjustable stator vanes are "control with rotational speed" and "fully closed pneumatically"; the configuration options for the bleed air rate are "control with rotational speed" and "fully open valve". Furthermore, automatic control of the exhaust valve with rotation can also be configured as needed (310). The automatic control of the exhaust valve with rotation can also be controlled by a button (such as the 603 in Figure 6 ), and is connected by means of a hard-wired channel trigger, and is accompanied by an LED indicator light. The light on represents valve control with rotation, and the light off represents that the valve does not perform control with rotation.

[0066] When the rotational speed of the test piece reaches the idle speed (Yes at 312), the EBI command is cancelled (314). In an alternative embodiment, the EBI command can also be manually cancelled by pressing the EBI button again under EBI conditions.

[0067] Figure 4 Shows the control flow chart 400 of the anti-surge command of the present invention.

[0068] As Figure 4 shown, when the anti-surge command is triggered and the exhaust valve is less than the high limit (Yes at 402), the anti-surge command becomes effective (404). In various embodiments of the present invention, the anti-surge command can be automatically triggered (for example, automatically triggered by the control system when surge of the test piece is detected), or the anti-surge command can be manually triggered (for example, by manually pressing the anti-surge button (such as the button 602 in Figure 6 )).

[0069] When the anti-surge command is a single command (No at 406), the release condition of the anti-surge command is that the valve position of the exhaust valve is greater than or equal to the target valve position or reaches the high limit position (Yes at 408).

[0070] For example, assume that the preset opening of the anti-surge command is 20 (degrees) and the high limit position of the valve is 80. If the current opening of the valve during surge is 50, then the target valve position is 50 + 20 = 70. In this case, when it is detected that the valve position of the valve is greater than or equal to 70, the anti-surge command is automatically released. If the current opening of the valve during surge is 65, then the target valve position is 65 + 20 = 85. However, since the high limit position of the valve is 80, the actual valve position of the valve cannot reach the target valve position of 85. In this case, when it is detected that the valve position of the valve reaches the high limit position of 80, the anti-surge command is automatically released.

[0071] When the anti-surge command is a command triggered by superposition during the EBI process (Yes at 406), the exhaust valve opens to the MAX valve position, where the MAX valve position represents the maximum value between the valve position corresponding to the rotational speed in the EBI follow-up valve position table and the target valve position. At this time, the release condition of the anti-surge command is that the valve position of the exhaust valve is greater than or equal to the MAX valve position or reaches the high limit position (Yes at 410).

[0072] When the anti-surge command meets the conditions at 408 or 410, the anti-surge command is released (412).

[0073] Figure 4 It is shown that the anti-surge command acts on a single exhaust valve. In an implementation using a main control valve and a fine control valve, the anti-surge command acts on both the main control valve and the fine control valve in common, and when both the main control valve and the fine control valve meet the above conditions, the anti-surge command becomes effective or is released.

[0074] Figure 3 and Figure 4 Define the effective and release conditions of the EBI command and the anti-surge command, reconstruct the anti-surge control process, make the control timing clear and complete, and make the test operation smoother and more reasonable.

[0075] Figure 5 Shows an exemplary control timing 500 of the exhaust valve of the present invention.

[0076] For the sake of explanation Figure 5 Only the control timing of a single valve is shown as an example. In the case where there are both a main control valve and a fine control valve, the control timings of the main control valve and the fine control valve are the same by analogy.

[0077] Figure 5The upper part shows various trigger signals for the exhaust valve, where EBI_OutletValve_Select represents the enabling of the valve follow - up control function; EBI_Active represents the effectiveness of the EBI command; HMI / VCS PB_Active represents the normal trigger of the interface / keypad panel; AntiSurge_Active represents the effectiveness of the anti - surge command; EBI_AntiSurge_Active represents the triggering of the anti - surge command during the EBI process.

[0078] Figure 5 The lower part shows the response signals of the exhaust valve, where MAX_End represents the exhaust valve opening to the MAX valve position, where t represents the time period for transitioning from the target valve position to the EBI follow - up valve position table valve position when the target valve position is greater than the EBI follow - up valve position table valve position; EBI represents the exhaust valve opening to the valve position corresponding to the rotational speed in the EBI valve follow - up table; AntiSurge represents the exhaust valve opening to the anti - surge command target valve position; HMI / VCS PB represents the exhaust valve opening to the specified valve position of the normal trigger of the interface / keypad panel.

[0079] From Figure 5 it can be seen that the present invention uses a variety of trigger signals to trigger the exhaust valve, and at the same time the exhaust valve uses a variety of valve position response signals for response, making the control timing of the exhaust valve clearer and avoiding the competition for control rights of the EBI command and the anti - surge command over the exhaust valve. Thus, the present invention controls the compressor test through various methods / modes such as controlling the trigger and / or response of the exhaust valve, controlling the EBI rotational speed, and controlling the command authority, thereby avoiding logical conflicts during the test and ensuring the safety of the test piece. This conflict - avoiding control method can be referred to as "multi - mode emergency conflict control" in this article.

[0080] Figure 6 shows an exemplary implementation device 600 of the control method of the present invention.

[0081] The control method of the present invention can be implemented by a device as shown in Figure 6 As shown in Figure 6 , 601 represents the EBI key and LED indicator light, 602 represents the anti - surge key and LED indicator light, 603 represents the valve follow - up control enable / disable key and LED indicator light, intuitively reflecting whether the above three signals are effective. 604 represents the programmable logic controller PLC, which is a platform for implementing the above - mentioned control method. 605 represents the host computer / human - machine interface, through which the operator can perform real - time configuration of the EBI follow - up table of the exhaust valve, the preset opening of the anti - surge command, etc. 606 represents the exhaust valve, and 607 represents the frequency converter. The PLC controls the rotational speed of the test piece by sending commands to the frequency converter.

[0082] It should be noted that Figure 6 the device of Figure 6 is only exemplary. In different embodiments, different devices may be adopted to implement the control method of the present invention.

[0083] Figure 7 A control system 700 for a compressor test according to the present invention is shown.

[0084] As Figure 7 shown, the system 700 may include a surge detection module 702, a surge elimination module 704, a valve follow - up control module 706, and an instruction cancellation module 708. Each of these modules may be directly or indirectly connected or communicate with each other on one or more buses 710.

[0085] In various embodiments of the present invention, the surge detection module 702 may be configured to: detect whether a surge occurs in the test piece of the compressor.

[0086] The surge elimination module 704 is configured to: when the surge detection module detects that a surge occurs in the test piece, trigger a first anti - surge instruction, which causes the exhaust valve of the test piece to open to a first target valve position and keeps the speed of the test piece unchanged; if the surge detection module detects that a surge occurs in the test piece again after executing the first anti - surge instruction, then trigger an emergency speed reduction to idle EBI instruction, and this EBI instruction causes the speed of the test piece to be reduced at a preset rate. Wherein, when a surge occurs in the test piece and a second anti - surge instruction is triggered during the execution of the EBI instruction, this second anti - surge instruction causes the exhaust valve of the test piece to open at least to a second target valve position and the speed of the test piece continues to be reduced at a preset rate.

[0087] The valve follow - up control module 706 is configured to: enable or disable the valve follow - up control function, where this valve follow - up control function means that the valve position of the exhaust valve changes with the speed of the test piece.

[0088] The surge elimination module 706 is further configured to: if the valve follow - up control function is enabled, then during the execution of the EBI instruction, the exhaust valve opens to the valve position corresponding to the speed in the EBI valve follow - up table; if the valve follow - up control function is enabled, and a surge occurs in the test piece and a second anti - surge instruction is triggered during the execution of the EBI instruction, then the exhaust valve opens to the MAX valve position, and this MAX valve position represents the maximum value between the valve position corresponding to the speed in the EBI follow - up valve table and the second target valve position.

[0089] The surge elimination module 706 is further configured to: if the valve follow - up control function is disabled, then keep the valve position of the exhaust valve during the execution of the EBI instruction; if a specified valve position is received from an instruction with a higher authority than the EBI instruction during the execution of the EBI instruction, then the exhaust valve opens to this specified valve position.

[0090] The command cancellation module 708 is configured to: automatically cancel the corresponding anti-surge command when the valve position of the exhaust valve is greater than or equal to the target valve position of the anti-surge command or reaches the high limit position of the exhaust valve; and automatically cancel the EBI command when the speed of the test piece reaches the idle speed.

[0091] In some embodiments, the exhaust valve includes an independently controllable main control valve and a fine control valve, and the command cancellation module 708 is further configured to: automatically cancel the corresponding anti-surge command when the valve positions of both the main control valve and the fine control valve are greater than or equal to the target valve position of the anti-surge command or reach the high limit positions of the corresponding valves.

[0092] It should be understood that Figure 7 only an exemplary structure of the control system is shown. In other examples, the control system of the present invention can be implemented in different ways. For example, one or more modules can be added or omitted, or multiple modules can be combined or integrated.

[0093] During the execution of the EBI command by the above control system of the present invention, if the anti-surge command is triggered again, the speed continuously decreases, causing the test piece to move away from the high-speed state, thereby achieving effective anti-surge. In addition, by opening the exhaust valve position to the MAX valve position in the case of deep surge, the problem of unexpected re-surge caused by the operation of the exhaust valve position is effectively solved, while avoiding opening too large and entering unstable working conditions such as stall, and the test state can be restored quickly after the anti-surge is completed, saving the test cost. The valve rotation following control module designed by the present invention enhances the controllability of these key devices of the exhaust valve and reduces the test operation risk.

[0094] The detailed description set forth above in conjunction with the accompanying drawings describes examples and does not represent all examples that can be implemented or fall within the scope of the claims. The terms "example" and "exemplary" when used in this specification mean "serving as an example, instance, or illustration" and do not mean "superior to or better than other examples".

[0095] The reference to "one embodiment" or "an embodiment" throughout this specification means that a particular feature, structure, or characteristic described in connection with that embodiment is included in at least one embodiment of the present invention. Thus, the use of these phrases may refer to more than just one embodiment. In addition, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0096] The foregoing description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects. Thus, the claims are not intended to be limited to the aspects shown herein, but are to be accorded the full scope consistent with the language of the claims, wherein the recitation of a singular element is not intended to mean "one and only one" unless specifically stated otherwise, but rather "one or more." The term "some," unless specifically stated otherwise, means one or more. All structural and functional equivalents of the elements of the various aspects described throughout this disclosure that are known or later come to be known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be covered by the claims.

[0097] It should also be noted that these embodiments may be described as processes depicted as flowcharts, flow diagrams, structural diagrams, or block diagrams. Although a flowchart may describe the operations as a sequential process, many of the operations can be performed in parallel or concurrently. In addition, the order of these operations may be re-arranged.

[0098] Although various embodiments have been illustrated and described, it should be understood that the embodiments are not limited to the precise configurations and components described above. Various modifications, substitutions, and improvements that are obvious to those skilled in the art can be made in the arrangement, operation, and details of the devices disclosed herein without departing from the scope of the claims.

Claims

1. A control method for compressor testing, comprising: When it is detected that the test piece of the compressor surges, triggering a first anti-surge command, the first anti-surge command opening the exhaust valve of the test piece to a first target valve position and keeping the speed of the test piece unchanged; If it is detected again that the test piece surges after executing the first anti-surge command, triggering an EBI command, the EBI command reducing the speed of the test piece at a preset rate. Wherein, when it is detected that the test piece surges during the execution of the EBI command and a second anti-surge command is triggered, the second anti-surge command opening the exhaust valve of the test piece to at least a second target valve position and the speed of the test piece continuing to be reduced at the preset rate.

2. The method according to claim 1, wherein Further comprising: Determining whether the valve follow-up control function is enabled after triggering the EBI command, where the valve follow-up control function means that the valve position of the exhaust valve changes with the change of the speed of the test piece; And If it is determined that the valve follow-up control function is enabled, then during the execution of the EBI command, the exhaust valve is opened to the valve position corresponding to the speed in the EBI valve position follow-up table.

3. The method according to claim 2, wherein If it is determined that the valve follow-up control function is enabled, and it is detected that the test piece surges during the execution of the EBI command and the second anti-surge command is triggered, then the exhaust valve is opened to the MAX valve position, and the MAX valve position represents the maximum value between the valve position corresponding to the speed in the EBI valve position follow-up table and the second target valve position.

4. The method according to claim 2, wherein If it is determined that the valve follow-up control function is disabled, then the valve position of the exhaust valve is maintained during the execution of the EBI command.

5. The method according to claim 2, wherein If a specified valve position is received from a command with a higher authority than the EBI command during the execution of the EBI command, then the exhaust valve is opened to the specified valve position.

6. The method according to claim 1, characterized in that: When the valve position of the exhaust valve is greater than or equal to the target valve position of the anti-surge command or reaches the high limit position of the exhaust valve, the corresponding anti-surge command is automatically cancelled; or When the speed of the test piece reaches the idle speed or a command to cancel the EBI command is received, the EBI command is automatically cancelled.

7. The method according to claim 1, characterized in that, The exhaust valve includes an independently controllable main regulating valve and a fine regulating valve, and wherein, when the valve positions of both the main regulating valve and the fine regulating valve are greater than or equal to the target valve position of the anti-surge command or reach the high limit positions of the corresponding valves, the corresponding anti-surge command is automatically cancelled.

8. A control system for compressor testing, comprising: A surge detection module configured to: detect whether the test piece of the compressor surges; A surge elimination module configured to: When the surge detection module detects that the test piece surges, triggering a first anti-surge command, the first anti-surge command opening the exhaust valve of the test piece to a first target valve position and keeping the speed of the test piece unchanged; And If the surge detection module detects that the test piece surges again after executing the first anti-surge instruction, an EBI instruction is triggered. The EBI instruction causes the rotational speed of the test piece to decrease at a preset rate. Wherein, when it is detected that the test piece surges and the second anti-surge instruction is triggered during the execution of the EBI instruction, the second anti-surge instruction causes the exhaust valve of the test piece to open at least to a second target valve position and the rotational speed of the test piece to continue to decrease at the preset rate.

9. The system according to claim 8, wherein Further comprising a valve rotation following control module, the valve rotation following control module being configured to enable or disable a valve rotation following control function, wherein the valve rotation following control function means that the valve position of the exhaust valve changes with the change of the rotational speed of the test piece; and Wherein, the surge elimination module is further configured to: if the valve rotation following control function is enabled, during the execution of the EBI instruction, the exhaust valve opens to the valve position corresponding to the rotational speed in the EBI valve position rotation following table.

10. The system according to claim 9, wherein The surge elimination module is further configured to: If the valve rotation following control function is enabled, and it is detected that the test piece surges and the second anti-surge instruction is triggered during the execution of the EBI instruction, the exhaust valve opens to the MAX valve position, and the MAX valve position represents the maximum value between the valve position corresponding to the rotational speed in the EBI valve position rotation following table and the second target valve position.

11. The system according to claim 9, characterized in that, The surge elimination module is further configured to: If the valve rotation following control function is disabled, during the execution of the EBI instruction, the valve position of the exhaust valve is maintained.

12. The system according to claim 9, wherein The surge elimination module is further configured to: If a specified valve position is received from an instruction with a higher authority than the EBI instruction during the execution of the EBI instruction, the exhaust valve opens to the specified valve position.

13. The system according to claim 8, wherein Further comprising an instruction cancellation module, the instruction cancellation module being configured to: When the valve position of the exhaust valve is greater than or equal to the target valve position of the anti-surge instruction or reaches the high limit position of the exhaust valve, automatically cancel the corresponding anti-surge instruction; or When the rotational speed of the test piece reaches the idle speed or a command to cancel the EBI instruction is received, automatically cancel the EBI instruction.

14. The system according to claim 13, wherein The exhaust valve includes an independently controllable main regulating valve and a fine regulating valve, and wherein, the instruction cancellation module is further configured to: When the valve positions of both the main regulating valve and the fine regulating valve are greater than or equal to the target valve position of the anti-surge instruction or reach the high limit positions of the corresponding valves, automatically cancel the corresponding anti-surge instruction.

15. A computer-readable storage medium storing a computer program for controlling a compressor test, the computer program being executable by a processor to perform the method according to any one of claims 1-7.

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