Control method and system of water electrolysis hydrogen production system, electronic equipment and storage medium

Abstract

The invention discloses a control method and system of a water electrolysis hydrogen production system, electronic equipment and a storage medium, and belongs to the technical field of hydrogen production. The method comprises the following steps: determining the lowest water flow total demand quantity of an electrolysis system in the water electrolysis hydrogen production system and the flow of a standby pump; the configuration number of the standby pumps is determined according to the minimum water flow total demand quantity of the electrolysis system and the flow of the standby pumps; the starting number of standby pumps is determined according to the actual operation condition of a main pump of the water electrolysis hydrogen production system; and control strategies of the main pump and the standby pumps are determined according to the number and flow of the started standby pumps. According to the method, sufficient water replenishing flow can be ensured, and the problem that the electrolysis system is interlocked and shut down or the service life of the electrolysis system is shortened when the water flow is insufficient is solved. Reliable, efficient and stable operation of the water electrolysis hydrogen production process can be achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydrogen production, and in particular relates to a control method, system, electronic equipment and storage medium for a water electrolysis hydrogen production system. Background Art

[0002] In the existing electrolysis water hydrogen production process, a certain amount of desalted water is stored in the water tank, and the water consumed by electrolysis is replenished to the electrolysis system through a water pump (main pump or backup pump). Generally, the main pump and the backup pump use the same model of light vertical multi-stage centrifugal pump. Each electrolysis system is generally equipped with a main pump, and the backup pump is set up for multiple electrolysis systems. Under normal circumstances, the main pump is selected to replenish water. When the main pump fails, the backup pump is switched to replenish water for the electrolysis system. However, when multiple main pumps fail on site, the flow rate when switching to the backup pump to replenish water for the electrolysis system will not meet the replenishment flow rate requirements of a single electrolysis system, which may cause the purity of the hydrogen produced by electrolysis to be unqualified. In severe cases, it will cause interlocking shutdowns, resulting in large economic losses. If multiple backup pumps are set up for water replenishment, there is no corresponding solution for how to configure the backup pumps and how to control the electrolysis water hydrogen production system after configuration. Summary of the invention

[0003] In view of the above problems, the control method of the electrolytic water hydrogen production system proposed in the present invention adopts a specific configuration method and control strategy for the main pump and the backup pump for supplying water to the electrolysis system, so as to solve the problem that when multiple main pumps fail, the backup pump is switched to supply water to the electrolysis system corresponding to the failed main pump and the water replenishment flow requirement of the single electrolysis system cannot be met. The specific technical solution is as follows:

[0004] In a first aspect, the present invention provides a control method for a water electrolysis hydrogen production system, comprising the following steps:

[0005] Determine the minimum total water flow demand of the electrolysis system and the flow of the standby pump in the water electrolysis hydrogen production system;

[0006] Determine the number of backup pumps to be configured based on the minimum total water flow demand of the electrolysis system and the flow of the backup pumps;

[0007] Determine the number of backup pumps to be started based on the actual operation of the main pump of the water electrolysis hydrogen production system;

[0008] The control strategy of the main pump and / or the standby pump is determined according to the number of start-up of the standby pump, and the control strategy includes a pause strategy and a start-up strategy.

[0009] Furthermore, the number of main pumps in the water electrolysis hydrogen production system is set according to the number of electrolysis systems, and each electrolysis system is correspondingly provided with a main pump, and the flow rate of each main pump is greater than or equal to the maximum value of the minimum water flow demand in the corresponding electrolysis system.

[0010] Furthermore, the number of backup pumps to be configured is determined according to the minimum total water flow requirement of the electrolysis system and the flow of the backup pumps according to the following function:

[0011]

[0012] Among them, Q set is the minimum total water flow demand of the electrolysis system, Q2 is the flow of the standby pump, n is the number of configured standby pumps, and the ceil function returns the smallest integer value greater than or equal to the calculated result.

[0013] Furthermore, the number of the backup pumps to be configured must satisfy the requirement that the total flow of all backup pumps is greater than or equal to the minimum total water flow requirement of all electrolysis systems in the electrolysis hydrogen production system.

[0014] Furthermore, the method of determining the number of standby pumps to be started according to the actual operation of the water electrolysis hydrogen production system is specifically:

[0015] If there are s main pumps that fail in the water electrolysis hydrogen production system, the number of backup pumps to be started is calculated using the following formula:

[0016]

[0017] Among them, s is the number of main pump failures, Q i is the minimum water flow requirement of the i-th electrolysis system, Q2 is the flow of each standby pump, t is the number of standby pumps that need to be started, and the ceil function returns the smallest integer value greater than or equal to the calculated result.

[0018] Furthermore, the control strategy of determining the main pump and / or the standby pump according to the number of standby pumps started, wherein the control strategy includes a pause strategy and a start strategy, comprises the following steps:

[0019] When some of the main pumps in the electrolysis hydrogen production system fail, a startup strategy is executed for each backup pump according to the startup number of the backup pumps;

[0020] Set the preset flow ranges of the standby pump and the main pump respectively, and collect the flow of the main pump and / or the standby pump after startup respectively;

[0021] When the flow rate of the started main pump and / or standby pump is not within the preset flow rate range, a pause strategy is executed for the main pump and / or standby pump whose flow rate is not within the preset flow rate range.

[0022] Furthermore, the launch strategy includes:

[0023] Fill the pump casing of the main pump and / or standby pump to be started with water to form a vacuum;

[0024] After closing the outlet valve of the main pump and / or standby pump, start the main pump and / or standby pump, and then open the outlet valve of the main pump and / or standby pump;

[0025] The stopping strategy includes: first closing the outlet valve of the main pump and / or the standby pump, and then controlling the electrolysis hydrogen production system to cut off power.

[0026] In a second aspect, the present invention provides a control system for a water electrolysis hydrogen production system, comprising:

[0027] A flow determination module is used to determine the minimum total water flow demand of the electrolysis system and the flow of the standby pump in the water electrolysis hydrogen production system;

[0028] The configuration module is used to determine the number of backup pumps to be configured according to the total minimum water flow demand of the electrolysis system and the flow of the backup pumps; and to determine the number of backup pumps to be started according to the actual operation of the main pump of the water electrolysis hydrogen production system;

[0029] The DCS control module is used to determine the control strategy of the main pump and / or the standby pump according to the number of standby pumps started, wherein the control strategy includes a pause strategy and a start strategy.

[0030] Furthermore, the flow determination module determines the minimum total water flow requirement of the electrolysis system as:

[0031] Obtaining the minimum water flow requirement of each electrolysis system in the water electrolysis hydrogen production system;

[0032] The minimum water flow requirement of each electrolysis system is summed to obtain the total minimum water flow requirement of the electrolysis system.

[0033] Furthermore, the DCS control module adopts a redundant design;

[0034] The DCS control module sets multiple alarm levels according to the liquid level data of the water tank. When the actual liquid level data of the water tank is in the first interval, a high liquid level alarm is issued.

[0035] When the actual liquid level data of the water tank is in the second interval, a high liquid level alarm is triggered;

[0036] When the actual liquid level data of the water tank is in the third interval, a low liquid level alarm is triggered;

[0037] When the actual liquid level data of the water tank is in the fourth interval, a low liquid level alarm is triggered.

[0038] In a third aspect, the present invention provides an electronic device, comprising a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus;

[0039] a memory storing a computer program;

[0040] The processor is used to implement the control method of the water electrolysis hydrogen production system when executing the program stored in the memory.

[0041] In a fourth aspect, the present invention proposes a computer-readable storage medium storing a computer program, which, when executed, executes the control method of the water electrolysis hydrogen production system.

[0042] Beneficial effects of the present invention:

[0043] The control method of the water electrolysis hydrogen production system proposed in the present invention first accurately calculates the minimum total water flow demand and standby pump flow required by the electrolysis system, and matches the configuration quantity of the standby pumps accordingly. Subsequently, the number of standby pumps started is dynamically adjusted according to the actual operating status of the main pump, and then the control strategy of the main pump and the standby pump is flexibly formulated according to the number of standby pumps started and their flow characteristics. This method can effectively ensure the adequacy of the water replenishment flow, and avoid the risk of interlocking shutdown of the electrolysis system caused by insufficient water flow, and the possible reduction in the service life of the electrolysis system. Reliable, efficient and stable operation of the water electrolysis hydrogen production process is achieved.

[0044] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0046] Figure 1 A flow chart showing a control method of a water electrolysis hydrogen production system proposed in an embodiment of the present invention;

[0047] Figure 2 A schematic diagram showing the arrangement of an electrolysis system, a main pump, and a standby pump in the electrolysis hydrogen production system proposed in an embodiment of the present invention is shown;

[0048] Figure 3 A schematic diagram showing the arrangement of an electrolysis system, a main pump, and a standby pump in an electrolysis hydrogen production system proposed in another embodiment of the present invention is shown;

[0049] Figure 4 A flow chart of a control system of a water electrolysis hydrogen production system proposed in an embodiment of the present invention is shown;

[0050] Figure 5 A schematic diagram of an electronic device proposed by the present invention is shown. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] In order to solve the problem that the backup pump may have insufficient flow, the present invention adopts a process of equipping multiple backup pumps for improvement. When the backup pump supplies water to the electrolysis system, the water supply is achieved through the regulating valve at the front end of the electrolysis system. The present invention proposes a control method for the electrolysis water hydrogen production system, such as Figure 1 As shown, the specific steps include:

[0053] S1: Determine the minimum total water flow demand of the electrolysis system and the flow of the standby pump in the water electrolysis hydrogen production system;

[0054] S2: Determine the number of backup pumps to be configured based on the minimum total water flow demand of the electrolysis system and the flow of the backup pumps;

[0055] In one embodiment of the present invention, assuming that there are a total of r electrolysis systems in the electrolysis hydrogen production system, determining the number of standby pumps in the electrolysis hydrogen production system includes the following steps:

[0056] Assume that the minimum water flow demand of the i-th electrolysis system is Q i , there are a total of r electrolysis systems, then the minimum total water flow demand of the electrolysis hydrogen production system is Q set The calculation formula is as follows:

[0057]

[0058] Assume that the actual selection of the main pump is: the flow rate of the jth main pump is Q j , there are m sets of main pumps in total, then the total flow of the main pumps is Q mT The calculation formula is as follows:

[0059]

[0060] To achieve the normal working requirements of the electrolysis hydrogen production system, the total flow of all main pumps must be greater than or equal to the minimum total water flow requirement of the electrolysis system, that is:

[0061] Q mT ≥Q set (3)

[0062] If each electrolysis system is equipped with a main pump (ie, m=r at this time), it is also necessary to satisfy that the flow rate of each main pump is greater than or equal to the minimum required water flow rate of the corresponding electrolysis system.

[0063] Assume that the actual selection of the backup pump is: the flow rate of the kth backup pump is Q k There are n sets of spare pumps in total, and the total flow rate of the spare pumps is Q nT ,but:

[0064]

[0065] The worst case of the electrolytic hydrogen production system is that each main pump is damaged. To meet the normal working requirements of the electrolytic hydrogen production system, the backup pump must at least provide the minimum total water flow demand of the electrolytic hydrogen production system. In this case, the total flow of the backup pump should be greater than or equal to the minimum total water flow demand of the electrolytic hydrogen production system, that is:

[0066] Q nT ≥Q set (5)

[0067] Considering the convenience of maintenance and spare parts management, the main pumps are generally of the same type, and the flow rate of each main pump is Q1; the standby pumps are also of the same type, and the flow rate of each standby pump is Q2, then:

[0068] Q mT =m×Q1 (6)

[0069] Q nT =n×Q2(7)

[0070] Among them, Q mT and Q nT They are the total water flow of the main pump and the total water flow of the standby pump respectively.

[0071] If the electrolysis hydrogen production system uses electrolysis systems from multiple manufacturers, the minimum water flow requirements of each electrolysis system may be different. Therefore, in order to achieve the normal working requirements of the electrolysis hydrogen production system, the following requirements need to be met:

[0072] The flow rate of each main pump must be greater than or equal to the maximum value of the minimum water flow demand of the electrolysis system, that is:

[0073] Q1≥max(Q i )(8)

[0074] And the number n of standby pumps should be greater than or equal to the minimum integer value of the ratio of the minimum total water flow demand of the electrolysis system to the flow of the standby pump, that is:

[0075]

[0076] Among them, Q set is the minimum total water flow demand of the electrolysis system, Q2 is the flow of each backup pump, n is the number of backup pumps configured, the max function returns the maximum value of the minimum water flow demand of each electrolysis system, and the ceil function returns the smallest integer value greater than or equal to the calculated result.

[0077] S3: Determine the number of backup pumps to be started according to the actual operation of the main pump of the water electrolysis hydrogen production system;

[0078] In one embodiment of the present invention, assuming that there are s main pumps that fail, the calculation formula for the number of standby pumps that need to be started is as follows:

[0079]

[0080] Where s is the number of main pump failures, 1≤s≤r or m, Q i is the minimum water flow requirement of the i-th electrolysis system, Q2 is the flow of the standby pump, and t is the number of standby pumps that need to be started.

[0081] S4: Determine a control strategy for the main pump and / or the standby pump according to the number of standby pumps started, wherein the control strategy includes a pause strategy and a start strategy.

[0082] Determining the control strategy of the main pump and / or the standby pump according to the number of standby pumps to be started includes the following steps:

[0083] When some of the main pumps in the electrolysis hydrogen production system fail, a startup strategy is executed for each backup pump according to the startup number of the backup pumps;

[0084] It should be noted that the startup strategy is also applicable to the startup of the main pump; the startup strategy is specifically: the pump casing of the main pump and / or standby pump to be started is filled with water to form a vacuum, then the outlet valve is closed, the main pump and / or standby pump are started, and then the outlet valve is opened. This is because there is no water in the outlet pipeline of the pump at startup, so there is no pipeline resistance and lifting height resistance. After the centrifugal pump is started, the centrifugal pump head is very low and the flow rate is very large. At this time, the pump motor (shaft power) output is very large (according to the pump performance curve), which is very easy to overload, which will damage the pump motor and circuit. Therefore, when starting, the pump casing should be filled with water to form a vacuum, and then the outlet valve should be closed to reduce the motor starting current, and then the main / standby pump should be started, and finally the outlet valve should be slowly opened. In some embodiments of the present invention, the energy efficiency optimization of the system can also be considered in the startup strategy, and the pump with higher energy efficiency can be started first; or an intelligent algorithm can be introduced to predict future flow requirements, adjust the operating status of the pump in advance, and reduce energy consumption and response time.

[0085] Exemplarily, the method of preferentially starting a pump with higher energy efficiency includes the following steps:

[0086] Conduct energy efficiency evaluation on all pumps, including key parameters such as energy efficiency grade, power factor, efficiency curve, etc. of each pump;

[0087] Based on the evaluation results, the pumps are divided into two categories: high-efficiency pumps and low-efficiency pumps;

[0088] On the premise of meeting the system flow requirements, higher energy-efficient pumps are started first. This can be achieved by setting the start-up sequence or priority of the pumps to ensure that high-efficiency pumps are enabled first when needed.

[0089] Exemplarily, introducing an intelligent algorithm to predict future flow demand and adjusting the operating state of the pump in advance includes the following steps:

[0090] Collect historical traffic data, system operation data, environmental parameters (such as temperature, humidity, etc.), clean and organize the data, remove invalid or abnormal data, and obtain cleaned historical data;

[0091] Use machine learning algorithms (such as support vector machines, random forests, etc.) to build a prediction model, and use cleaned historical data to train the prediction model so that it can accurately predict future traffic demand;

[0092] Based on the prediction results, the operating status of the pump can be adjusted in advance, such as starting or stopping additional pumps, to meet future flow requirements.

[0093] Set the preset flow range of each main pump and standby pump respectively, and collect the flow of the main pump and / or standby pump after startup respectively;

[0094] When the flow rate of the started main pump and / or standby pump is not within the preset flow rate range, a pause strategy is executed for the main pump and / or standby pump whose flow rate is not within the preset flow rate range.

[0095] The specific suspension strategy is: first close the outlet valve of the main pump and / or standby pump and then control the power off of the electrolytic hydrogen production system to avoid damage caused by idling of the main pump and standby pump. The reason is that when stopping, if the power is cut off first, once the outlet valve does not work, the pump will reverse, the high-pressure liquid will quickly return through the outlet valve, and the impeller will reverse; once the impeller reverses, the impeller cap will easily fall off, and the impeller cap will also fall off. It may also cause the pump shaft to bend and the seal to be damaged. It is allowed to operate with the outlet valve closed for a short time, so the suspension strategy should close the outlet valve first and then control the power off to protect the pump.

[0096] Specifically, a flow meter can be installed at the outlet of each standby pump and the main pump, and the flow meter can be interlocked with the DCS. When the flow rate of the running main pump and / or standby pump received by the DCS is less than the preset flow rate range set on the DCS interface, the DCS will control the pump to stop running. In some embodiments of the present invention, a check valve (not shown in the figure) can also be installed at the outlet of the main pump and the standby pump to avoid the above problems even if the operator stops the pump without closing the outlet valve. In other embodiments of the present invention, an alarm device can also be provided to issue an alarm warning when the flow rate of the main pump and / or the standby pump is not within the preset flow rate range.

[0097] In an exemplary embodiment of the present invention, the main and standby pumps of the electrolytic hydrogen production system are configured as follows: Figure 2 As shown, in the electrolysis hydrogen production system, m electrolysis systems are provided, each electrolysis system is provided with a main pump and n standby pumps, and a flow meter is installed at the outlet of each main pump and standby pump to detect the water flow rate flowing out of each main pump and standby pump. The inlet of each main pump and standby pump is connected to the inlet branch pipe, and the other end of the inlet branch pipe is connected to the water replenishment main line. A butterfly valve is provided on the water replenishment main line, and the other end of the water replenishment line is connected to a water tank. A liquid level meter is provided on the water tank to detect the liquid level in the water tank. A water replenishment solenoid valve is provided on the water inlet line of the water tank to control the entry of replenishment water.

[0098] It should be noted that the installation position of the flow meter generally follows the straight pipe section 10 times the pipe diameter at the front end of the flow meter and the straight pipe section 5 times the pipe diameter at the rear end of the flow meter.

[0099] In other embodiments of the present invention, considering the cost of the entire electrolytic hydrogen production system, it can be considered to combine the flowmeters at the outlets of the main pump and the standby pump into one, that is, only one flowmeter (such as Figure 3 shown).

[0100] Based on the same inventive concept, the present invention also proposes a control system for a water electrolysis hydrogen production system, such as Figure 4 As shown, including:

[0101] A flow determination module is used to determine the minimum total water flow demand of the electrolysis system and the flow of the standby pump in the water electrolysis hydrogen production system;

[0102] The flow determination module determines the minimum total water flow requirement of the electrolysis system as:

[0103] Determine the minimum water flow requirement of each electrolysis system in the water electrolysis hydrogen production system;

[0104] The minimum water flow requirement of each electrolysis system is summed to obtain the total minimum water flow requirement of the electrolysis system.

[0105] The configuration module is used to determine the number of backup pumps to be configured according to the total minimum water flow demand of the electrolysis system and the flow of the backup pumps; and to determine the number of backup pumps to be started according to the actual operation of the main pump of the water electrolysis hydrogen production system;

[0106] The DCS control module is used to determine the control strategy of the main pump and / or the standby pump according to the number of standby pumps started, wherein the control strategy includes a pause strategy and a start strategy.

[0107] It should be noted that the DCS control module in the present invention adopts a redundant design, that is, the CPU module (central processing unit module) and the IO module (input and output module) in the DCS control module are redundantly configured to prevent the failure of one of the CPU modules or IO modules, and can quickly switch to the redundant CPU module or redundant IO module, so that the entire system can operate normally for a long time. The DCS control module is also used to collect the liquid level signal in the water tank, and 4 protection alarm levels are set according to the liquid level data, including high-high liquid level alarm, high liquid level alarm, low liquid level alarm, and low-low liquid level alarm. When the water tank liquid level is in the above 4 liquid level alarm intervals, the operator is reminded on the DCS operation interface to check the pipeline, water tank, liquid level meter, water supply solenoid valve and other equipment.

[0108] Exemplarily, when the actual liquid level data of the water tank is in the first interval, a high liquid level alarm is triggered;

[0109] When the actual liquid level data of the water tank is in the second interval, a high liquid level alarm is triggered;

[0110] When the actual liquid level data of the water tank is in the third interval, a low liquid level alarm is triggered;

[0111] When the actual liquid level data of the water tank is in the fourth interval, a low liquid level alarm is triggered.

[0112] The first interval, the second interval, the third interval and the fourth interval do not overlap, and the liquid level data of each interval is arranged in the following order: the first interval> the second interval> the third interval> the fourth interval.

[0113] Another exemplary embodiment of the present invention provides an electronic device. Figure 5 As shown, the electronic device includes at least one processor 501, at least one communication interface 502, at least one memory 503 and at least one communication bus 504; wherein the processor 501, the communication interface 502 and the memory 503 communicate with each other through the communication bus 504;

[0114] Memory 503, storing computer programs;

[0115] The processor 501 is used to implement the control method of the water electrolysis hydrogen production system when executing the program stored in the memory 503.

[0116] Optionally, the communication interface may be an interface of a communication module, such as an interface of a GSM module; the processor may be a processor CPU, or an application specific integrated circuit ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement the embodiments of the present invention. The memory may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory. The memory stores a program, and the processor calls the program stored in the memory to execute some or all of the above method embodiments.

[0117] Based on the same inventive concept, the embodiment of the present application further provides a computer-readable storage medium storing a computer program, which implements part or all of the above method embodiments when the computer program is executed. Optionally, the storage medium may be a non-temporary computer-readable storage medium, for example, the non-temporary computer-readable storage medium may be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0118] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A control method for a water electrolysis hydrogen production system, characterized in that: The following steps are involved: Determine the minimum total water flow demand of the electrolysis system and the flow of the standby pump in the water electrolysis hydrogen production system; Determine the number of backup pumps to be configured based on the minimum total water flow demand of the electrolysis system and the flow of the backup pumps; Determine the number of backup pumps to be started based on the actual operation of the main pump of the water electrolysis hydrogen production system; The control strategy of the main pump and / or the standby pump is determined according to the number of start-up of the standby pump, and the control strategy includes a pause strategy and a start-up strategy.

2. The control method of the water electrolysis hydrogen production system according to claim 1, characterized in that: The number of main pumps in the water electrolysis hydrogen production system is set according to the number of electrolysis systems, and each electrolysis system is provided with a main pump, and the flow rate of each main pump is greater than or equal to the maximum value of the minimum water flow demand in the corresponding electrolysis system.

3. The control method of the water electrolysis hydrogen production system according to claim 1, characterized in that: The configuration quantity of the backup pumps is determined according to the minimum total water flow demand of the electrolysis system and the flow of the backup pumps according to the following function: Among them, Q set is the minimum total water flow demand of the electrolysis system, Q2 is the flow of the standby pump, n is the number of configured standby pumps, and the ceil function returns the smallest integer value greater than or equal to the calculated result.

4. The control method of the water electrolysis hydrogen production system according to claim 3, characterized in that: The number of the backup pumps to be configured must satisfy the requirement that the total flow of all backup pumps is greater than or equal to the minimum total water flow demand of all electrolysis systems in the water electrolysis hydrogen production system.

5. The control method of the water electrolysis hydrogen production system according to claim 1, characterized in that: The specific method of determining the startup quantity of the standby pumps according to the actual operation of the water electrolysis hydrogen production system is: If there are s main pumps that fail in the water electrolysis hydrogen production system, the number of backup pumps to be started is calculated using the following formula: Among them, s is the number of main pump failures, Q i is the minimum water flow requirement of the i-th electrolysis system, Q2 is the flow of each standby pump, t is the number of standby pumps that need to be started, and the ceil function returns the smallest integer value greater than or equal to the calculated result.

6. The control method of the water electrolysis hydrogen production system according to claim 1, characterized in that: The control strategy of determining the main pump and / or the standby pump according to the number of standby pumps started, wherein the control strategy includes a pause strategy and a start strategy, comprises the following steps: When some of the main pumps in the electrolysis hydrogen production system fail, a startup strategy is executed for each backup pump according to the startup number of the backup pumps; Set the preset flow ranges of the standby pump and the main pump respectively, and collect the flow of the main pump and / or the standby pump after startup respectively; When the flow rate of the started main pump and / or standby pump is not within the preset flow rate range, a pause strategy is executed for the main pump and / or standby pump whose flow rate is not within the preset flow rate range.

7. The control method of the water electrolysis hydrogen production system according to claim 6, characterized in that: The startup strategy includes: Fill the pump casing of the main pump and / or standby pump to be started with water to form a vacuum; After closing the outlet valve of the main pump and / or standby pump, start the main pump and / or standby pump, and then open the outlet valve of the main pump and / or standby pump; The stopping strategy includes: first closing the outlet valve of the main pump and / or the standby pump, and then controlling the electrolysis hydrogen production system to cut off power.

8. A control system for a water electrolysis hydrogen production system, characterized in that: include: A flow determination module is used to determine the minimum total water flow demand of the electrolysis system and the flow of the standby pump in the water electrolysis hydrogen production system; The configuration module is used to determine the number of backup pumps to be configured according to the total minimum water flow demand of the electrolysis system and the flow of the backup pumps; and to determine the number of backup pumps to be started according to the actual operation of the main pump of the water electrolysis hydrogen production system; The DCS control module is used to determine the control strategy of the main pump and / or the standby pump according to the number of standby pumps started, wherein the control strategy includes a pause strategy and a start strategy.

9. The control system of the water electrolysis hydrogen production system according to claim 8, characterized in that: The flow determination module determines the minimum total water flow requirement of the electrolysis system as: Obtaining the minimum water flow requirement of each electrolysis system in the water electrolysis hydrogen production system; The minimum water flow requirement of each electrolysis system is summed to obtain the total minimum water flow requirement of the electrolysis system.

10. The control system of the water electrolysis hydrogen production system according to claim 8, characterized in that: The DCS control module adopts a redundant design; The DCS control module sets multiple alarm levels according to the liquid level data of the water tank. When the actual liquid level data of the water tank is in the first interval, a high liquid level alarm is issued. When the actual liquid level data of the water tank is in the second interval, a high liquid level alarm is triggered; When the actual liquid level data of the water tank is in the third interval, a low liquid level alarm is triggered; When the actual liquid level data of the water tank is in the fourth interval, a low liquid level alarm is triggered.

11. An electronic device, characterized in that: It includes a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus; a memory storing a computer program; The processor is used to implement the control method of the water electrolysis hydrogen production system described in any one of claims 1-7 when executing the program stored in the memory.

12. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed, the control method of the water electrolysis hydrogen production system according to any one of claims 1 to 7 is executed.

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