Control Method, System, Electronic Device and Storage Medium for Hydrogen Production System by Electrolyzing Water

Abstract

The present invention discloses a control method, system, electronic device and storage medium for an electrolytic water hydrogen production system, belonging to the technical field of hydrogen production. By determining the minimum total water flow demand of the electrolysis system and the flow rate of the standby pump in the electrolytic water hydrogen production system; then determining the configuration quantity of the standby pump according to the minimum total water flow demand of the electrolysis system and the flow rate of the standby pump; determining the starting quantity of the standby pump according to the actual operation condition of the main pump in the electrolytic water hydrogen production system; and determining the control strategy of the main pump and the standby pump according to the starting quantity and flow rate of the standby pump. The above method can ensure that the water replenishment flow rate is sufficient, and avoid the problems of interlock shutdown of the electrolysis system or reduction of the service life of the electrolysis system caused by insufficient water flow rate. It can realize the reliable, efficient and stable operation of the electrolytic water hydrogen production process.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydrogen production, and particularly relates to a control method, a system, an electronic device and a storage medium for an electrolytic water hydrogen production system. Background Art

[0002] In the existing electrolytic water hydrogen production process, a certain amount of demineralized water is stored in a water tank, and water consumed by electrolysis is replenished to the electrolysis system through a water pump (main pump or standby pump). Generally, the main pump and the standby pump adopt the same type of light vertical multi-stage centrifugal pump. Each electrolysis system is generally equipped with one main pump, and one standby pump is set for multiple electrolysis systems. Under normal circumstances, the main pump is selected to supply water. When the main pump fails, it is switched to the standby pump to supply water to the electrolysis system. However, when multiple main pumps on site fail and it is switched to the standby pump to supply water to the electrolysis system, the flow rate will not meet the water replenishment flow rate requirement of a single electrolysis system, which may cause the hydrogen purity generated by electrolysis to be unqualified. In severe cases, it will cause interlock shutdown, resulting in relatively large economic losses. And if multiple standby pumps are set for water replenishment, there is no corresponding solution to how to configure the standby pumps and how to control the electrolytic water hydrogen production system after configuration. Summary of the Invention

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

[0004] In a first aspect, the present invention proposes a control method for an electrolytic water hydrogen production system, including the following steps:

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

[0006] Determine the configuration quantity of the standby pump according to the total minimum water flow rate requirement of the electrolysis system and the flow rate of the standby pump;

[0007] Determine the startup quantity of the standby pump according to the actual operation situation of the main pump in the electrolytic water hydrogen production system;

[0008] Determine the control strategy of the main pump and / or the standby pump according to the startup quantity of the standby pump, and the control strategy includes a pause strategy and a startup strategy.

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

[0010] Further, the number of standby pumps configured according to the total minimum water flow demand of the electrolysis system and the flow rate of the standby pumps is determined by the following function:

[0011]

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

[0013] Further, the number of standby pumps configured should satisfy that the total flow rate of all standby pumps is greater than or equal to the total minimum water flow demand of all electrolysis systems in the electrolytic hydrogen production system.

[0014] Further, the specific method for determining the number of standby pumps to be started according to the actual operation of the electrolytic water hydrogen production system is as follows:

[0015] If s main pumps in the electrolytic water hydrogen production system fail, the number of standby pumps to be started is calculated using the following formula:

[0016]

[0017] where s is the number of main pumps that have failed, Q i is the minimum water flow demand of the i-th electrolysis system, Q2 is the flow rate of each standby pump, t is the number of standby pumps to be started, and the ceil function returns the smallest integer greater than or equal to the calculation result.

[0018] Further, the control strategy for the main pumps and / or standby pumps is determined according to the number of standby pumps started. The control strategy includes a pause strategy and a start strategy, which include the following steps:

[0019] When some main pumps in the electrolytic hydrogen production system fail, the start strategy is executed for each standby pump according to the number of standby pumps started;

[0020] The preset flow rate ranges for the standby pumps and the main pumps are set respectively, and the flow rates of the started main pumps and / or standby pumps are collected respectively;

[0021] When the flow rates of the started main pumps and / or standby pumps are not within the preset flow rate ranges, the pause strategy is executed for the main pumps and / or standby pumps whose flow rates are not within the preset flow rate ranges.

[0022] Even further, the start strategy includes:

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

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

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

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

[0027] A flow rate determination module for determining the total minimum water flow rate demand of the electrolysis system in the electrolytic water hydrogen production system and the flow rate of the standby pump;

[0028] A configuration module for determining the configured quantity of the standby pump according to the total minimum water flow rate demand of the electrolysis system and the flow rate of the standby pump; and determining the starting quantity of the standby pump according to the actual operating conditions of the main pump of the electrolytic water hydrogen production system;

[0029] A DCS control module for determining the control strategy of the main pump and / or standby pump according to the starting quantity of the standby pump, and the control strategy includes a pause strategy and a start strategy.

[0030] Further, the total minimum water flow rate demand of the electrolysis system determined in the flow rate determination module is:

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

[0032] Summing up the minimum water flow rate demands of each electrolysis system to obtain the total minimum water flow rate demand of the electrolysis system.

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

[0034] In the DCS control module, multiple alarm levels are set corresponding to the liquid level data of the water tank. When the actual liquid level data of the water tank is in the first interval, it is a high-high liquid level alarm;

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

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

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

[0038] In a third aspect, the present invention provides an electronic device, comprising a processor, a communication interface, a memory, and a communication bus. Among them, the processor, the communication interface, and the memory complete mutual communication through the communication bus;

[0039] The memory stores a computer program;

[0040] A processor, when executing a program stored in a memory, implements the control method of the electrolytic water hydrogen production system described above.

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

[0042] Advantages of the present invention:

[0043] For the control method of the electrolytic water hydrogen production system proposed by the present invention, first, the total minimum water flow demand and the standby pump flow required by the electrolysis system are accurately calculated, and the number of configured standby pumps is matched accordingly. Subsequently, the starting number of standby pumps is dynamically adjusted according to the actual operating state of the main pump, and then, based on the number of started standby pumps and their flow characteristics, the control strategies for the main pump and the standby pump are flexibly formulated. This method can effectively ensure the sufficiency of the water replenishment flow, avoid the risk of interlock shutdown of the electrolysis system caused by insufficient water flow from the source, and the problem of reduced service life of the electrolysis system that may result. It realizes the reliable, efficient and stable operation of the electrolytic water hydrogen production process.

[0044] Other features and advantages of the present invention will be described in the subsequent specification, and, in part, will become obvious from the specification, or will be understood by implementing the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the structures pointed out in the specification, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0046] Figure 1 Shows a flowchart of a control method for an electrolytic water hydrogen production system proposed in an embodiment of the present invention;

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

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

[0049] Figure 4 Shows a flowchart of a control system for an electrolytic water hydrogen production system proposed in an embodiment of the present invention;

[0050] Figure 5 Shows a schematic diagram of an electronic device proposed by the present invention. Specific embodiments

[0051] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0052] To address the problem of insufficient flow rate that may occur in standby pumps, the present invention improves the process by equipping multiple standby pumps. When the standby pumps supply 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 an electrolytic water hydrogen production system, as Figure 1 shown, which specifically includes the following steps:

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

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

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

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

[0057]

[0058] Assume that the actual selection of the main pump is: the flow rate of the j-th main pump is Q j , and there are a total of m sets of main pumps, then the total flow rate of the main pumps Q mT is calculated as follows:

[0059]

[0060] To meet the normal working requirements of the electrolytic hydrogen production system, it is necessary to ensure that the total flow rate of all main pumps is greater than or equal to the total minimum water flow demand of the electrolysis system, that is:

[0061] Q mT ≥Q set (3)

[0062] If each electrolysis system is equipped with one main pump (i.e., m = r at this time), it is also necessary to ensure 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 selected model of the standby pump is: the flow rate of the kth standby pump is Q k , and there are n sets of standby pumps, and the total flow rate of the standby pumps is Q nT , then:

[0064]

[0065] In the worst case of the electrolytic hydrogen production system, each main pump is damaged. To meet the normal working requirements of the electrolytic hydrogen production system, the standby pumps must at least provide the total minimum water flow rate demand of the electrolytic hydrogen production system. In this case, the total flow rate of the standby pumps should be greater than or equal to the total minimum water flow rate 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, generally, the same model of water pump is selected for the main pumps, and the flow rate of each main pump is Q1; the same model of water pump is also selected for the standby pumps, 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 are the total water flow rate of the main pumps and the total water flow rate of the standby pumps, respectively.

[0071] If multiple manufacturers' electrolysis systems are used in the electrolytic hydrogen production system, the minimum water flow rate requirements of each electrolysis system may be different. Therefore, to meet the normal working requirements of the electrolytic hydrogen production system, the following requirements need to be met:

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

[0073] Q1 ≥ max(Q i )(8)

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

[0075]

[0076] Among them, Q set is the total minimum water flow demand of the electrolysis system, Q2 is the flow rate of each standby pump, n is the number of configured standby pumps, 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 calculation result.

[0077] S3: Determine the start-up quantity of the standby pumps according to the actual operation of the main pumps in the hydrogen production system by electrolyzing water;

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

[0079]

[0080] Among them, s is the number of failed main pumps, 1 ≤ s ≤ r or m, Q i is the minimum water flow demand of the i-th electrolysis system, Q2 is the flow rate of the standby pump, and t is the number of standby pumps to be started.

[0081] S4: Determine the control strategy of the main pumps and / or standby pumps according to the start-up quantity of the standby pumps, and the control strategy includes a pause strategy and a start-up strategy.

[0082] Determining the control strategy of the main pumps and / or standby pumps according to the start-up quantity of the standby pumps includes the following steps:

[0083] When some main pumps in the hydrogen production system by electrolysis fail, execute the start-up strategy for each standby pump according to the start-up quantity of the standby pumps;

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

[0085] Exemplarily, preferentially starting pumps with higher energy efficiency includes the following steps:

[0086] Conduct energy efficiency assessments on all pumps, including key parameters such as the energy efficiency grade, power factor, and efficiency curve of each pump;

[0087] According to the evaluation results, classify the pumps into two categories: high-efficiency pumps and low-efficiency pumps;

[0088] On the premise of meeting the system flow requirements, give priority to starting pumps with higher energy efficiency. Specifically, this can be achieved by setting the start 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 requirements and adjusting the operating state of the pumps in advance includes the following steps:

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

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

[0092] According to the prediction results, adjust the operating state of the pumps in advance, such as starting or stopping additional pumps to meet future flow requirements.

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

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

[0095] The pause strategy is specifically as follows: 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 the main pump and standby pump running idly. The reason is that when stopping, if the power is cut off first, once the outlet valve fails, it will cause the pump to reverse, and the high-pressure liquid will rush back rapidly through the outlet valve, and the impeller will reverse; once the impeller reverses, the impeller cap is likely to fall off, and the impeller will also fall off if the cap falls off. It may also cause the bending of the pump shaft and the damage of the seal. However, it is allowed to run with the outlet valve closed for a short time. Therefore, the pause strategy should first close the outlet valve and then control the power-off to protect the pump.

[0096] Specifically, flow meters can be installed at the outlets of each standby pump and the main pump respectively, and the flow meters are interlocked with the DCS. When the flow rate of the operating 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, check valves (not shown in the figure) can also be installed at the outlets of the main pump and the standby pump to prevent the above problems from occurring even when the operator stops the pump without closing the outlet valve. In other embodiments of the present invention, an alarm device can also be set to give an alarm preview when the flow rate of the main pump and / or standby pump is not within the preset flow rate range.

[0097] In an exemplary embodiment of the present invention, the configuration of the main and standby pumps of the electrolytic hydrogen production system is as Figure 2 shown. In this electrolytic hydrogen production system, there are m sets of electrolysis systems, and each set of electrolysis systems is correspondingly provided with a main pump, and n standby pumps are provided. At the outlet of each main pump and standby pump, a flow meter is installed 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 an inlet branch pipe, the other end of the inlet branch pipe is connected to the make-up water main pipeline, a butterfly valve is arranged on the make-up water main pipeline, the other end of the make-up water pipeline is connected to a water tank, a liquid level meter is arranged on the water tank to detect the liquid level in the water tank, and a make-up water solenoid valve is arranged on the inlet pipeline of the water tank to control the entry of make-up water.

[0098] It should be noted that the installation position of the flow meter generally follows a 10-fold pipe diameter straight pipe section at the front end of the flow meter and a 5-fold pipe diameter straight pipe section 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, the flow meters at the outlets of the main pump and the standby pump can be combined into one, that is, only one flow meter is installed at the inlet of each electrolysis system (as Figure 3 shown).

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

[0101] A flow rate determination module for determining the total minimum water flow rate demand of the electrolysis system in the electrolytic water hydrogen production system and the flow rate of the standby pump;

[0102] In the flow rate determination module, the total minimum water flow rate demand of the electrolysis system is determined as:

[0103] Determine the minimum water flow rate demand of each set of electrolysis systems in the electrolytic water hydrogen production system;

[0104] Sum up the minimum water flow rate demands of each set of electrolysis systems to obtain the total minimum water flow rate demand of the electrolysis system.

[0105] Configuration module, configured to determine the configured quantity of standby pumps according to the total minimum water flow demand of the electrolysis system and the flow rate of the standby pumps; and determine the starting quantity of the standby pumps according to the actual operating conditions of the main pumps of the water electrolysis hydrogen production system.

[0106] DCS control module, configured to determine the control strategies for the main pumps and / or standby pumps according to the starting quantity of the standby pumps, where the control strategies include 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, both the CPU module (central processing unit module) and the IO module (input / output module) in the DCS control module are redundantly configured, so as to quickly switch to the redundant CPU module or redundant IO module in case of failure of one of the CPU modules or IO modules, so that the entire system can operate normally for a long time. The DCS control module is also configured to collect the liquid level signal in the water tank, and set 4 protection alarm levels 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 equipment such as pipelines, water tanks, liquid level gauges, and water replenishment solenoid valves.

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

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

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

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

[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 are 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. As Figure 5 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 a computer program;

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

[0116] Optionally, the communication interface may be the interface of a communication module, such as the interface of a GSM module; the processor may be a processor CPU, or a 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 high-speed RAM memory and may also include non-volatile memory, such as at least one disk memory. Among them, 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, an embodiment of the present application further provides a computer-readable storage medium storing a computer program, which when run, implements some or all of the above method embodiments. Optionally, the storage medium may be a non-transitory computer-readable storage medium. For example, the non-transitory computer-readable storage medium may be ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device, etc.

[0118] Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A control method for an electrolytic water hydrogen production system, characterized in that, It includes the following steps: Determine the total minimum water flow demand of the electrolysis system in the water electrolysis hydrogen production system and the flow rate of the standby pump; Determine the number of configured standby pumps according to the total minimum water flow demand of the electrolysis system and the flow rate of the standby pump. The number of configured standby pumps is determined according to the following function: Among them, Q set is the total minimum water flow demand of the electrolysis system, Q2 is the flow rate 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 calculation result; Determine the start-up number of the standby pump according to the actual operation of the main pump in the water electrolysis hydrogen production system; If s main pumps in the water electrolysis hydrogen production system fail, the start-up number of the standby pump is calculated using the following formula: where s is the number of main pumps with faults, Q i is the minimum water flow demand of the i-th electrolysis system, t is the number of standby pumps to be started, and the ceil function returns the smallest integer greater than or equal to the calculation result; Determine the control strategy of the main pump and / or standby pump according to the start-up number of the standby pump. The control strategy includes a pause strategy and a start-up strategy.

2. The control method of the electrolytic water 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. One main pump is correspondingly set for each electrolysis system, 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 electrolytic water hydrogen production system according to claim 1, characterized in that, The number of configured standby pumps should meet the requirement that the total flow rate of all standby pumps is greater than or equal to the total minimum water flow demand of all electrolysis systems in the water electrolysis hydrogen production system.

4. The control method of the electrolytic water hydrogen production system according to claim 1, wherein, The step of determining the control strategy of the main pump and / or standby pump according to the start-up number of the standby pump. The control strategy includes a pause strategy and a start-up strategy includes the following steps: When some main pumps in the water electrolysis hydrogen production system fail, execute the start-up strategy for each standby pump according to the start-up number of the standby pump; Respectively set the flow rate preset range of the standby pump and the main pump, and respectively collect the flow rate of the started main pump and / or standby pump; When the flow rate of the started main pump and / or standby pump is not within the flow rate preset range, execute the pause strategy for the main pump and / or standby pump whose flow rate is not within the flow rate preset range.

5. The control method of the electrolytic water hydrogen production system according to claim 4, characterized in that The start-up 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 pause strategy includes: 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.

6. A control system for an electrolytic water hydrogen production system, characterized in that, It includes: A flow rate determination module for determining the total minimum water flow demand of the electrolysis system in the water electrolysis hydrogen production system and the flow rate of the standby pump; A configuration module for determining the number of configured standby pumps according to the total minimum water flow demand of the electrolysis system and the flow rate of the standby pump. The number of configured standby pumps is determined according to the following function: Among them, Q set is the total minimum water flow demand of the electrolysis system, Q2 is the flow rate 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 calculation result; Determine the start-up number of the standby pump according to the actual operation of the main pump in the water electrolysis hydrogen production system; If s main pumps in the water electrolysis hydrogen production system fail, the start-up number of the standby pump is calculated using the following formula: where s is the number of main pumps with faults, Q i is the minimum water flow requirement of the i-th electrolysis system, t is the number of standby pumps to be started, and the ceil function returns the smallest integer greater than or equal to the calculation result; A DCS control module for determining the control strategy of the main pump and / or standby pump according to the start-up number of the standby pump. The control strategy includes a pause strategy and a start-up strategy.

7. The control system of the electrolytic water hydrogen production system according to claim 6, characterized in that, The total minimum water flow demand of the electrolysis system determined in the flow rate determination module is: Obtain the minimum water flow demand of each electrolysis system in the water electrolysis hydrogen production system; Sum up the minimum water flow demand of each electrolysis system to obtain the total minimum water flow demand of the electrolysis system.

8. The control system of the electrolytic water hydrogen production system according to claim 6, characterized in that, The DCS control module adopts a redundant design; Multiple alarm levels are correspondingly set in the DCS control module 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, it is a high-high liquid level alarm; When the actual liquid level data of the water tank is in the second interval, it is a high liquid level alarm; When the actual liquid level data of the water tank is in the third interval, it is a low liquid level alarm; When the actual liquid level data of the water tank is in the fourth interval, it is a very low liquid level alarm.

9. An electronic device, characterized in that, It includes a processor, a communication interface, a memory, and a communication bus. Among them, the processor, the communication interface, and the memory complete mutual communication through the communication bus; The memory stores a computer program; The processor is used to implement the control method of the electrolytic water hydrogen production system according to any one of claims 1-5 when executing the program stored in the memory.

10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is run, it executes the control method of the electrolytic water hydrogen production system according to any one of claims 1-5.

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