Hydrogen compressor control system

Abstract

The invention discloses a hydrogen compressor control system. The system comprises an air inlet control module, a compressor body, an air return control module, an exhaust control module, a compressor frequency conversion module and a control module. The air inlet control module, the compressor body and the exhaust control module are communicated to form an air passage; an outlet of the compressor body is communicated with an inlet of the compressor body through the air return control module to form an air passage; after the control module controls the air inlet control module and the exhaust control module to be opened and controls the compressor frequency conversion module to reach the starting frequency, the air inlet pressure of an inlet of the compressor body is detected; when the air inlet pressure is smaller than the target air inlet pressure, the air return control module is controlled to be opened until the air inlet pressure is larger than or equal to the target air inlet pressure; and when the air inlet pressure is larger than the target air inlet pressure, the control module adjusts the starting frequency of the compressor frequency conversion module until the air inlet pressure is equal to the target air inlet pressure, and the air return control module is controlled to be closed.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, and more particularly to a hydrogen compressor control system. Background Technology

[0002] Hydrogen, as a highly efficient and clean secondary energy carrier, has broad application prospects in fuel cell vehicles and energy storage, and can also effectively solve environmental pollution problems. However, the low molecular weight and low density of hydrogen present significant challenges to efficient storage. High-pressure gaseous storage is currently the most mature and widely used solution, which requires compressing hydrogen to high pressure.

[0003] Currently, the mainstream technologies used for hydrogen compression in the market mainly include diaphragm compressors, reciprocating compressors, and centrifugal compressors. Although these technologies can be applied in specific scenarios, hydrogen compressors suffer from low operating efficiency. Therefore, producing efficient and reliable hydrogen compressors has become a key core equipment in the hydrogen energy industry chain and a problem that researchers urgently need to solve. Summary of the Invention

[0004] This invention provides a hydrogen compressor control system that ensures the compressor operates at its highest efficiency when the intake pressure is stabilized at the target pressure, while also avoiding the problem of frequent start-stop cycles that can occur during the operation of the hydrogen compressor.

[0005] To achieve the above objectives, embodiments of the present invention also provide a hydrogen compressor control system, which includes: an intake control module, a compressor body, a return control module, an exhaust control module, a compressor frequency converter module, and a control module;

[0006] The intake control module, the compressor body, and the exhaust control module are connected to form a gas passage; the outlet of the compressor body is connected to the inlet of the compressor body through the return gas control module to form a gas passage; the compressor frequency converter module is coupled to the compressor body.

[0007] The control module is electrically connected to the return air control module, the intake control module, the exhaust control module, the return air control module, and the compressor frequency converter module. It is used to control both the intake and exhaust control modules to open, and after the compressor frequency converter module reaches its starting frequency, to detect the intake pressure at the compressor body inlet. When the intake pressure is less than the target intake pressure, it controls the return air control module to open so that exhaust gas enters the compressor body inlet.

[0008] The control module is also used to adjust the operating frequency of the compressor inverter module until the intake pressure equals the target intake pressure when the intake pressure is greater than the target intake pressure, and to control the return air control module to close.

[0009] Optionally, the compressor body includes a primary compressor, a secondary compressor, and a bypass control unit;

[0010] The intake control module, the primary compressor, and the secondary compressor are connected to form a gas passage; the outlet of the secondary compressor is connected to the inlet of the secondary compressor through the bypass control unit;

[0011] The control module is also electrically connected to the bypass control unit and is used to detect the exhaust pressure at the outlet of the compressor body; and to control the bypass control unit to open according to the exhaust pressure and the intake pressure.

[0012] Optionally, the system may also include: a multi-stage pressure detection module, a multi-stage temperature detection module, and a frequency converter parameter detection module;

[0013] The multi-level pressure detection module is used to detect pressure information at various locations in the hydrogen compressor control system; the multi-level temperature detection module is used to detect temperature information at various locations in the hydrogen compressor control system; the frequency converter module parameter detection module is used to detect the operating parameter information of the compressor frequency converter module.

[0014] The control module is used to output an alarm shutdown command based on the information output by any one of the multi-level pressure detection module, the multi-level temperature detection module, and the frequency converter module parameter detection module, and to send the information output by the multi-level pressure detection module, the multi-level temperature detection module, and the frequency converter module parameter detection module to the cloud platform.

[0015] Optionally, the system further includes: an unloading control module; the inlet of the unloading control module is connected to the outlet of the compressor body; the outlet of the unloading control module is connected to air;

[0016] The control module is also used to control the compressor frequency converter module to stop urgently based on the alarm shutdown command, and to control the unloading control module to work until the total pressure in the hydrogen compressor control system is less than the preset unloading pressure, and to control both the intake control module and the exhaust control module to close.

[0017] Optionally, the compressor frequency converter module includes a frequency converter power supply contactor, a frequency converter power supply coil, a compressor frequency converter, and an emergency stop normally closed contact;

[0018] The power supply terminal of the compressor inverter is connected to the external power grid through the inverter power supply contactor; the inverter power supply coil is coupled to the inverter power supply contactor; the inverter power supply coil is connected to the emergency stop normally closed contact and the control voltage.

[0019] The control module is also used to control the emergency stop normally closed contact to open based on the alarm shutdown command, so as to disconnect the inverter power supply contactor.

[0020] Optionally, the control module is further configured to, when receiving a normal shutdown command, control the compressor frequency converter module to stop at a preset deceleration speed, and control both the intake control module and the exhaust control module to close.

[0021] Optionally, the control module of the system is further configured to perform pressure balancing control on the hydrogen compressor control system through the intake control module, the exhaust control module, and the bypass control unit before controlling both the intake control module and the exhaust control module to open and before controlling the compressor frequency converter module to reach the starting frequency.

[0022] Optionally, the control module of the system performs pressure balancing control on the hydrogen compressor control system through the intake control module, the exhaust control module, and the bypass control unit, specifically as follows:

[0023] Control the intake control module, the exhaust control module, and the bypass control unit to close;

[0024] When the inlet pressure of the first-stage compressor, the outlet pressure of the first-stage compressor, and the outlet pressure of the second-stage compressor are balanced, the intake control module, the exhaust control module, and the bypass control unit are disconnected.

[0025] Optionally, the control module of the system is further configured to, after controlling the compressor inverter module to stop at a preset deceleration speed and controlling both the intake control module and the exhaust control module to close,

[0026] The hydrogen compressor control system performs pressure maintenance control through the intake control module, the exhaust control module, and the bypass control unit.

[0027] Optionally, the control module of the system is further configured to perform pressure-maintaining control on the hydrogen compressor control system through the intake control module, the exhaust control module, and the bypass control unit, specifically:

[0028] When the pressure in the hydrogen compressor control system is lower than the preset pressure holding pressure, the intake control module, the exhaust control module, and the bypass control unit are opened.

[0029] When the pressure within the hydrogen compressor control system equals the preset pressure holding pressure, the intake control module, the exhaust control module, and the bypass control unit are closed.

[0030] In this embodiment of the invention, after the control module controls both the intake and exhaust control modules to open and the compressor inverter module to reach its starting frequency, it detects the intake pressure at the compressor body inlet. When the intake pressure is less than the target intake pressure, it controls the return gas control module to open until the intake pressure is greater than or equal to the target intake pressure. When the intake pressure is greater than the target intake pressure, the control module reduces the starting frequency of the compressor inverter module and controls the return gas control module to close. By controlling the return gas control module and reducing the inverter control module, the intake pressure is made equal to the target intake pressure, thus ensuring that the compressor operates at the highest efficiency at the target pressure. This also avoids the problem of frequent start-stop of the hydrogen compressor due to excessively low intake pressure, thereby reducing the self-loss of the compressor during cold starts and the impact on the power grid, and extending the service life of the compressor.

[0031] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the structure of a hydrogen compressor control system provided in an embodiment of the present invention;

[0034] Figure 2 This is a schematic diagram of another hydrogen compressor control system provided in an embodiment of the present invention;

[0035] Figure 3 This is a schematic diagram of another hydrogen compressor control system provided in an embodiment of the present invention;

[0036] Figure 4 This is a schematic diagram of another hydrogen compressor control system provided in an embodiment of the present invention;

[0037] Figure 5 This is a schematic diagram of another hydrogen compressor control system provided in an embodiment of the present invention. Detailed Implementation

[0038] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0039] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0040] Figure 1 This is a schematic diagram of the structure of a hydrogen compressor control system provided in an embodiment of the present invention, as shown below. Figure 1 As shown, the system includes: an intake control module 10, a compressor body 20, a return control module 30, an exhaust control module 40, a compressor frequency converter module 50, and a control module 60.

[0041] The intake control module 10, the compressor body 20 and the exhaust control module 40 are connected to form a gas passage; the outlet of the compressor body 20 is connected to the inlet of the compressor body 20 through the return gas control module 30 to form a gas passage; the compressor frequency converter module 50 is coupled to the compressor body 20.

[0042] The control module 60 is electrically connected to the intake control module 10, exhaust control module 40, return air control module 30, and compressor frequency converter module 50 (not shown in the figure). It is used to control the intake control module 10 and exhaust control module 40 to open and to control the compressor frequency converter module 50 to reach the starting frequency. After that, it detects the intake pressure P1 at the inlet of the compressor body 20. When the intake pressure P1 is less than the target intake pressure P0, it controls the return air control module 30 to open until the intake pressure P1 is greater than or equal to the target intake pressure P0.

[0043] The control module 60 is also used to adjust the starting frequency of the frequency converter control module 50 until the intake pressure P1 equals the target intake pressure P0 when the intake pressure P1 is greater than the target intake pressure P0, and to control the return air control module 30 to close.

[0044] The target intake pressure is the intake threshold that ensures the compressor body 20 operates at the highest efficiency. The compressor body 20 usually starts and stops frequently when the intake pressure is low. In this embodiment, the target intake pressure is usually greater than the intake threshold for starting and stopping the compressor body 20. The target intake pressure can be set according to different compressor bodies 20, and its specific value is not limited. For example, in some embodiments, the target intake pressure is 3MPa.

[0045] The intake control module 10 is responsible for outputting hydrogen from the front hydrogen production inlet to the compressor body 20 inlet; the intake control module 10 can be any device that performs the function of intake, and this embodiment does not limit it; for example, the intake control module 10 can be an intake valve;

[0046] The compressor body 20 can compress hydrogen at different compression ratios and output the compressed hydrogen to the exhaust control module 40. The compressor body 20 can be a diaphragm compressor, a reciprocating compressor, or a centrifugal compressor. Among them, the reciprocating compressor can be an oil-free reciprocating compressor or an oil-filled reciprocating compressor. This embodiment does not limit the specific type of the compressor body 20.

[0047] The compressor inverter module 50 can adjust the operating frequency of the compressor body 20, thereby controlling the operating speed of the compressor body 20, and thus changing the intake pressure at the inlet of the compressor body 20.

[0048] The exhaust control module 40 can control the discharge of compressed gas; the exhaust control module 40 can be any device that performs the function of exhaust, and this embodiment is not limited to it; for example, the exhaust control module 40 can be an exhaust valve;

[0049] The return gas control module 30 is normally closed; when it is open, it allows the exhaust gas from the outlet of the compressor body 20 to be input back to the compressor body 20, thereby changing the intake pressure at the inlet of the compressor body 20. The return gas control module 30 can be any device that performs the function of return gas, and this embodiment does not limit it; for example, the return gas control module 30 can be a return gas valve.

[0050] Specifically, in this embodiment, the control process of the hydrogen compressor is as follows: After the control module 60 controls both the intake control module 10 and the exhaust control module 40 to open and controls the compressor frequency converter module 50 to reach the starting frequency, the control module 60 can detect the intake pressure P1 at the inlet of the compressor body 20 after the compressor body 20 starts working. When the intake pressure P1 is less than the target intake pressure P0, the control module 60 controls the opening of the return gas control module 30 in real time according to the intake pressure and the target intake pressure until the intake pressure P1 is greater than or equal to the target intake pressure P0. If the intake pressure P1 is equal to the target intake pressure P0, the control module 60 controls the return gas control module 30 to close. If the intake pressure P1 is greater than the target intake pressure P0, the control module 60 also adjusts the starting frequency of the frequency converter module 50 until the intake pressure P1 is equal to the target intake pressure P0, and controls the return gas control module 30 to close. Specifically, the starting frequency of the frequency converter module 50 can be adjusted to increase.

[0051] In this embodiment of the invention, by controlling the opening degree of the return gas control module 30 and adjusting the frequency of the variable frequency control module 50, the intake pressure is made equal to the target intake pressure, thus ensuring that the compressor operates at the highest efficiency at the target pressure. At the same time, it avoids the problem of frequent start-stop of hydrogen compressors caused by excessively low intake pressure in the prior art, thereby reducing the self-loss of the compressor caused by cold start and the impact on the power grid, and extending the service life of the compressor.

[0052] Optionally, based on the above embodiments, the structure of the compressor body 20 can be further refined. Figure 2 This is a schematic diagram of another hydrogen compressor control system provided in an embodiment of the present invention; as shown. Figure 2 As shown, the compressor body 20 includes a primary compressor 21, a secondary compressor 22, and a bypass control unit 23; the intake control module 10, the primary compressor 21, and the secondary compressor 22 are connected to form a gas passage; the outlet of the secondary compressor 22 is connected to the inlet of the secondary compressor 22 through the bypass control unit 23;

[0053] The control module 60 is also electrically connected to the bypass control unit 23 and is also used to detect the exhaust pressure at the outlet of the compressor body 20; and to control the bypass control unit 23 to open according to the exhaust pressure and the intake pressure.

[0054] The bypass control unit 23 is normally in a closed state; when the bypass control unit 23 is in an open state, the secondary compressor can be bypassed, that is, the secondary compressor does not participate in the operation; when the bypass control unit 23 is in a closed state, both the primary compressor 21 and the secondary compressor 22 participate in the operation.

[0055] Specifically, in the control process of the hydrogen compressor in the above embodiment, the control module 60 also detects the exhaust pressure at the outlet of the compressor body 20 in real time. When the compression ratio determined by the ratio of exhaust pressure to intake pressure is less than the preset compression ratio, the bypass control unit 23 can be controlled to open, so that only the first-stage compressor 21 in the compressor body 20 participates in compression, thus saving the power consumption of the compressor body 20; when the compression ratio determined by the ratio of exhaust pressure to intake pressure is greater than the preset compression ratio, the bypass control unit 23 is controlled to remain closed.

[0056] It is understandable that in some other embodiments, considering that the intake pressure may fluctuate due to environmental influences, the bypass control unit 23 may be opened when the compression ratio determined by the ratio of (exhaust pressure + fluctuating pressure) to (intake pressure + fluctuating pressure) is less than the preset compression ratio.

[0057] Optionally, based on the above embodiments, the control system can be further optimized. Figure 3 This is a schematic diagram of another hydrogen compressor control system provided in an embodiment of the present invention; as shown. Figure 3 As shown, the control system also includes: a multi-level pressure detection module 70, a multi-level temperature detection module 80, and a frequency converter module parameter detection module 90; the multi-level pressure detection module 70 is used to detect the pressure information at various locations in the hydrogen compressor control system; the multi-level temperature detection module 80 is used to detect the temperature information at various locations in the hydrogen compressor control system; and the frequency converter module parameter detection module 90 is used to detect the operating parameter information of the compressor frequency converter module 50.

[0058] The control module 60 is used to output an emergency shutdown command based on the information output by any one of the multi-level pressure detection module 70, multi-level temperature detection module 80 and frequency converter parameter detection module 90, and to send the information output by the multi-level pressure detection module 70, multi-level temperature detection module 80 and frequency converter parameter detection module 90 to the cloud platform.

[0059] Specifically, the multi-stage pressure detection module 70 includes an intake pressure transmitter, a pressure transmitter between the primary and secondary compressors, and an exhaust pressure transmitter. When the intake pressure between the intake pressure transmitters exceeds a preset pressure threshold, or when the pressure between the primary and secondary compressors detected by the pressure transmitter exceeds a preset pressure threshold, or when the exhaust pressure detected by the exhaust pressure transmitter exceeds a preset pressure threshold, a stop emergency shutdown command is output. In this way, the reliability protection of the entire control system is achieved through the multi-stage pressure detection module 70.

[0060] The multi-stage temperature detection module 80 includes an intake air PT temperature sensor, a primary and secondary compressor inter-PT temperature sensor, and an exhaust air PT temperature sensor. When the intake air PT temperature sensor detects a temperature higher than a preset temperature, or the primary and secondary compressor inter-PT temperature sensor detects a temperature higher than a preset temperature, or the exhaust air PT temperature sensor detects an exhaust temperature higher than a preset temperature, an emergency shutdown command is output. In this way, the multi-stage temperature detection module 80 achieves reliability protection for the entire control system.

[0061] The inverter module parameter detection module 90 can be an inverter current detection unit and an inverter frequency detection unit. When the current information detected by the inverter current detection unit is greater than the preset current information, or when the frequency information detected by the inverter frequency detection unit is greater than the preset frequency information, an emergency shutdown command is output. Thus, the inverter module parameter detection module 90 protects the entire control system. This embodiment achieves reliability protection for the entire control system through the multi-level pressure detection module 70, the multi-level temperature detection module 80, and the inverter module parameter detection module 90, enabling precise fault repair and inspection of the control system subsequently. Furthermore, the information output by the multi-level pressure detection module 70, the multi-level temperature detection module 80, and the inverter module parameter detection module 90 can be sent to a cloud platform to achieve data synchronization.

[0062] Of course, in some embodiments, the control module 60 is also used to output a fault alarm command based on the information output by any one of the multi-level pressure detection module 70, the multi-level temperature detection module 80, and the frequency converter parameter detection module 90. Specifically, when the intake pressure between the intake pressure transmitters is greater than the alarm pressure threshold, a fault alarm command is output; or when the intake PT temperature sensor detects a temperature greater than the fault temperature, a fault alarm command is output; or when the frequency information detected by the frequency converter frequency detection unit is greater than the alarm frequency information, thus promptly prompting the user to perform maintenance and improving timeliness.

[0063] Optionally, based on the above embodiments, it can be further explained how the overall control system enters the protection state when an emergency shutdown command is determined. Figure 4 This is a schematic diagram of another hydrogen compressor control system provided in an embodiment of the present invention; as shown. Figure 4 As shown, the control system also includes: an unloading control module 100; the inlet of the unloading control module 100 is connected to the outlet of the compressor body 20; the outlet of the unloading control module 100 is connected to air.

[0064] The control module 60 is also used to control the compressor frequency converter module 50 to stop urgently based on the emergency shutdown command, and to control the unloading control module 100 to work until the total pressure in the hydrogen compressor control system is less than the preset unloading pressure, and to control both the intake control module 10 and the exhaust control module 40 to close.

[0065] In this embodiment, the unloading control module 100 is normally closed and can function as an unloading valve. When the control module 60 determines an emergency shutdown command based on information output from any of the multi-stage pressure detection module 70, multi-stage temperature detection module 80, and frequency converter parameter detection module 90 in the above embodiment, it also controls the compressor frequency converter module 50 to stop urgently based on the emergency shutdown command. That is, the frequency of the compressor frequency converter module 50 is directly reduced to 0, and the unloading control module 100 is controlled to operate. In this way, the exhaust gas from the outlet of the compressor body 20 is released into the air through the unloading control module 100 until the exhaust pressure at the outlet of the compressor body 20 is less than the preset unloading pressure, causing both the intake control module 10 and the exhaust control module 40 to close. In this embodiment, the unloading control module 100 enables the safe unloading of the entire control system, achieving rapid protection for the entire control system.

[0066] It should also be noted that the control module 60 can safely unload the overall control system by unloading the control module 100. At this time, the return air control module 30 and the bypass control switch 23 can be controlled to maintain their original state, so that the overall control system can respond quickly when it starts up next time.

[0067] Optionally, this embodiment details how the compressor inverter module 50 can be stopped urgently. Figure 5 This is a schematic diagram of another hydrogen compressor control system provided in an embodiment of the present invention; as shown. Figure 5 As shown, the compressor frequency converter module 50 includes a frequency converter power supply contactor 51, a frequency converter power supply coil 52, a compressor frequency converter 53, and an emergency stop normally closed contact 54.

[0068] The power supply terminal of the compressor inverter 53 is connected to the external power grid 380V through the inverter power supply contactor 51; the inverter power supply coil 52 is coupled to the inverter power supply contactor 51; the inverter power supply coil 52 and the emergency stop normally closed contact 54 are connected to the control voltage 24V; the control module 60 is also used to control the emergency stop normally closed contact 54 to open based on the emergency shutdown command so that the inverter power supply contactor 51 is disconnected.

[0069] Specifically, the control module 60 controls the emergency stop normally closed contact 54 to open based on the emergency shutdown command, thereby de-energizing the inverter power supply coil 52, which in turn causes the inverter power supply contactor 51 to open, thus de-energizing the compressor inverter 53, thereby causing the compressor inverter module 50 to stop urgently.

[0070] Optional, continue to refer to Figure 2-5The control module 60 is also used to control the compressor frequency converter module 50 to stop at a preset deceleration rate when a normal shutdown command is received, and to control both the intake control module 10 and the exhaust control module 40 to close. Specifically, during or after the hydrogen compressor control system stabilizes the intake pressure at the target intake pressure, when the control module 60 receives a normal shutdown command, it can control the compressor frequency converter module 50 to stop at a preset deceleration rate and control both the intake control module 10 and the exhaust control module 40 to close.

[0071] Additionally, it should be noted that when the control module 60 receives a normal shutdown command, if the return air control module 30 is open, it also needs to control the return air control module 30 to close; if the bypass control unit 23 is open, it also needs to control the bypass control unit 23 to close; if the return air control module 30 is closed, it controls the return air control module 30 to remain closed; if the bypass control unit 23 is closed, it controls the bypass control unit 23 to remain closed.

[0072] Optional, continue to refer to Figure 2-5 The control module 60 is also used to perform pressure balance control on the hydrogen compressor control system through the intake control module 10, the exhaust control module 40 and the bypass control unit 23 before the intake control module 10 and the exhaust control module 40 are both turned on and the compressor frequency converter module 50 reaches the starting frequency.

[0073] Before the compressor body 20 is started, the hydrogen compressor control system is pressurized and balanced through the intake control module 10, the exhaust control module 40 and the bypass control unit 23. This ensures that the overall control system does not enter the outside air and avoids excessive exhaust temperature, thus enabling the compressor body 20 to start stably.

[0074] Optionally, in some embodiments, reference continues to be made to... Figure 2-5 The control module 60 performs pressure balancing control on the hydrogen compressor control system through the intake control module 10, the exhaust control module 40, and the bypass control unit 23. Specifically, it controls the intake control module 10, the exhaust control module 40, and the bypass control unit 23 to close; and controls the intake control module 10, the exhaust control module 20, and the bypass control unit 23 to open when the inlet pressure of the first-stage compressor 21, the outlet pressure of the first-stage compressor 21, and the outlet pressure of the second-stage compressor 22 are balanced.

[0075] Optional, continue to refer to Figure 2-5The control module 60 is also used to control the hydrogen compressor control system through the intake control module 10, the exhaust control module 40 and the bypass control unit 23 after the compressor frequency converter module 50 stops at a preset deceleration speed and the intake control module 10 and the exhaust control module 40 are both closed.

[0076] After the compressor body 20 stops normally, it enters standby mode. In standby mode, there is a possibility of leakage in the entire control system. The hydrogen compressor control system is pressure maintained by the intake control module 10, the exhaust control module 40, and the bypass control unit 23 to ensure that no outside air enters the entire system and that the internal pipelines of the entire system are always in a slightly positive pressure state.

[0077] Optional, continue to refer to Figure 2-5 The control module 60 is also used to perform pressure holding control on the hydrogen compressor control system through the intake control module 10, the exhaust control module 40 and the bypass control unit 23. Specifically, when the pressure in the hydrogen compressor control system is less than the preset pressure holding pressure (e.g., 0.1 MPa), the intake control module 10, the exhaust control module 240 and the bypass control unit 23 are opened; when the pressure in the hydrogen compressor control system is equal to the preset pressure holding pressure, the intake control module 10, the exhaust control module 40 and the bypass control unit 23 are closed.

[0078] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A hydrogen compressor control system, characterized in that, Includes: intake control module, compressor body, return control module, exhaust control module, compressor frequency converter module and control module; The intake control module, the compressor body, and the exhaust control module are connected to form a gas passage; the outlet of the compressor body is connected to the inlet of the compressor body through the return gas control module to form a gas passage; the compressor frequency converter module is coupled to the compressor body. The control module is electrically connected to the intake control module, the exhaust control module, the return air control module, and the compressor inverter module. It is used to control the intake control module and the exhaust control module to open and, after the compressor inverter module reaches the starting frequency, to detect the intake pressure at the inlet of the compressor body; and when the intake pressure is less than the target intake pressure, to control the return air control module to open until the intake pressure is greater than or equal to the target intake pressure. The control module is also used to adjust the starting frequency of the compressor inverter module until the intake pressure equals the target intake pressure when the intake pressure is greater than the target intake pressure, and to control the return air control module to close.

2. The hydrogen compressor control system according to claim 1, characterized in that, The compressor body includes a primary compressor, a secondary compressor, and a bypass control unit; The intake control module, the primary compressor, and the secondary compressor are connected to form a gas passage; the outlet of the secondary compressor is connected to the inlet of the secondary compressor through the bypass control unit; The control module is also electrically connected to the bypass control unit and is used to detect the exhaust pressure at the outlet of the compressor body; and to control the bypass control unit to open according to the exhaust pressure and the intake pressure.

3. The hydrogen compressor control system according to claim 2, characterized in that, Also includes: Multi-stage pressure detection module, multi-stage temperature detection module, and frequency converter parameter detection module; The multi-level pressure detection module is used to detect pressure information at various locations in the hydrogen compressor control system; The multi-level temperature detection module is used to detect temperature information at various locations in the hydrogen compressor control system; The variable frequency module parameter detection module is used to detect the operating parameter information of the compressor variable frequency module; The control module is used to output an emergency shutdown command based on the information output by any one of the multi-level pressure detection module, the multi-level temperature detection module, and the frequency converter parameter detection module, and to send the information output by the multi-level pressure detection module, the multi-level temperature detection module, and the frequency converter parameter detection module to the cloud platform.

4. The hydrogen compressor control system according to claim 1, characterized in that, Also includes: An unloading control module; the inlet of the unloading control module is connected to the outlet of the compressor body; the outlet of the unloading control module is connected to air. The control module is also used to control the compressor frequency converter module to stop urgently based on the emergency shutdown command, and to control the unloading control module to work until the total pressure in the hydrogen compressor control system is less than the preset unloading pressure, and to control both the intake control module and the exhaust control module to close.

5. The hydrogen compressor control system according to claim 4, characterized in that, The compressor frequency converter module includes a frequency converter power supply contactor, a frequency converter power supply coil, a compressor frequency converter, and an emergency stop normally closed contact. The power supply terminal of the compressor inverter is connected to the external power grid through the inverter power supply contactor; the inverter power supply coil is coupled to the inverter power supply contactor; the inverter power supply coil is connected to the emergency stop normally closed contact and the control voltage. The control module is also used to control the emergency stop normally closed contact to open based on the emergency shutdown command, so that the inverter power supply contactor is disconnected.

6. The hydrogen compressor control system according to claim 2, characterized in that, The control module is also used to control the compressor inverter module to stop at a preset deceleration speed when a normal shutdown command is received, and to control both the intake control module and the exhaust control module to close.

7. The hydrogen compressor control system according to claim 2, characterized in that, The control module is also used to perform pressure balancing control on the hydrogen compressor control system through the intake control module, the exhaust control module, and the bypass control unit before controlling both the intake control module and the exhaust control module to open and before controlling the compressor frequency converter module to reach the starting frequency.

8. The hydrogen compressor control system according to claim 7, characterized in that, The control module performs pressure balancing control on the hydrogen compressor control system through the intake control module, the exhaust control module, and the bypass control unit, specifically as follows: Control the intake control module, the exhaust control module, and the bypass control unit to close; When the inlet pressure of the first-stage compressor, the outlet pressure of the first-stage compressor, and the outlet pressure of the second-stage compressor are balanced, the intake control module, the exhaust control module, and the bypass control unit are disconnected.

9. The hydrogen compressor control system according to claim 6, characterized in that, The control module is further configured to, after controlling the compressor inverter module to stop at a preset deceleration speed and controlling both the intake control module and the exhaust control module to close, The hydrogen compressor control system performs pressure maintenance control through the intake control module, the exhaust control module, and the bypass control unit.

10. The hydrogen compressor control system according to claim 9, characterized in that, The control module is also used to perform pressure-maintaining control on the hydrogen compressor control system through the intake control module, the exhaust control module, and the bypass control unit, specifically: When the pressure in the hydrogen compressor control system is lower than the preset pressure holding pressure, the intake control module, the exhaust control module, and the bypass control unit are opened. When the pressure within the hydrogen compressor control system equals the preset pressure holding pressure, the intake control module, the exhaust control module, and the bypass control unit are closed.

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