Hydrogen production control method and device based on multi-parameter dynamic adjustment, equipment and medium

Abstract

The application provides a hydrogen production control method and device based on multi-parameter dynamic adjustment, equipment and a medium, and relates to the technical field of equipment operation control. In the application, firstly, it is determined whether a target electrolytic cell is in a low current density state; secondly, when the target electrolytic cell is in the low current density state, concentration detection is performed on electrolyte of the target electrolytic cell to obtain a current concentration value; then, when the current concentration value is greater than a reference concentration value, dilution operation is performed on the electrolyte of the target electrolytic cell along the direction in which the concentration value of the diluted electrolyte approaches the reference concentration value, and the increase operation of the circulation speed of the electrolyte of the target electrolytic cell is performed, so that the dynamic adjustment of the electrolyte in the target electrolytic cell is realized. Based on the above, the problems of energy efficiency reduction, insufficient gas purity and equipment corrosion under low load in the prior art can be improved, and the safety, reliability and service life of the equipment under low load operation can be improved.

Description

Technical Field

[0001] This application relates to the field of equipment operation control technology, and more specifically, to a hydrogen production control method, apparatus, equipment, and medium based on multi-parameter dynamic adjustment. Background Technology

[0002] Against the backdrop of continuously growing global energy demand and increasingly severe environmental problems, energy transition has become a common goal for countries worldwide. Renewable energy sources such as solar, wind, and hydropower, due to their clean and sustainable characteristics, are gradually increasing their share in the energy mix. However, renewable energy is characterized by significant volatility and intermittency, posing a significant challenge to the stable operation of existing power systems. Hydrogen energy, as a clean and efficient secondary energy source, is considered an important component of the future energy system. Water electrolysis hydrogen production technology, by converting electrical energy into chemical energy and decomposing water into hydrogen and oxygen, provides an effective way to absorb and store renewable energy. Combining the fluctuating electricity from renewable energy sources with water electrolysis hydrogen production equipment can not only solve the intermittency problem of renewable energy but also achieve the efficient conversion and storage of clean energy, providing strong support for energy transition.

[0003] However, as more and more projects combine renewable energy with multiple sets of water electrolysis hydrogen production equipment, and as the two are combined and the operating time of multiple sets of equipment is getting longer and longer, it has been found that directly combining renewable energy with multiple sets of water electrolysis hydrogen production equipment to absorb the intermittency and volatility of renewable energy has problems. It is necessary to solve how to ensure that multiple sets of equipment can operate stably for a long time under low load, and the lifespan and reliability of the equipment under low load operation. Moreover, these issues are important factors restricting the development of combining renewable energy with multiple sets of water electrolysis hydrogen production.

[0004] During long-term operation under low load, water electrolysis hydrogen production equipment may encounter safety issues due to substandard hydrogen purity in oxygen. Long-term operation under low current density can also exacerbate electrode passivation in the electrolyzer, thereby affecting the normal lifespan of the equipment and the energy consumption and efficiency of hydrogen production. Summary of the Invention

[0005] In view of this, the purpose of this application is to provide a hydrogen production control method, apparatus, equipment and medium based on multi-parameter dynamic adjustment, so as to improve the problems of reduced energy efficiency, insufficient gas purity and equipment corrosion under low load in the prior art, and to improve the safety, reliability and life of the equipment under low load.

[0006] To achieve the above objectives, this application adopts the following technical solution:

[0007] A hydrogen production control method based on multi-parameter dynamic adjustment includes:

[0008] Determine whether the target electrolyzer is in a low current density state, wherein oxygen and hydrogen are produced by the electrolysis of water in the target electrolyzer;

[0009] When the target electrolytic cell is in a low current density state, the concentration of the electrolyte in the target electrolytic cell is detected to obtain the current concentration value;

[0010] When the current concentration value is greater than a predetermined reference concentration value, the electrolyte in the target electrolytic cell is diluted along the direction in which the concentration value of the diluted electrolyte approaches the reference concentration value, and the circulation speed of the electrolyte in the target electrolytic cell is increased to achieve dynamic adjustment of the electrolyte in the target electrolytic cell.

[0011] In a preferred embodiment of this application, in the aforementioned hydrogen production control method based on multi-parameter dynamic adjustment, the step of diluting the electrolyte in the target electrolyzer along the direction where the concentration of the diluted electrolyte approaches the reference concentration when the current concentration value is greater than a predetermined reference concentration value, and increasing the circulation rate of the electrolyte in the target electrolyzer to achieve dynamic adjustment of the electrolyte in the target electrolyzer, includes:

[0012] When the current concentration value is greater than a predetermined reference concentration value, the electrolyte in the target electrolytic cell is diluted in a direction that brings the concentration value of the diluted electrolyte closer to the reference concentration value, and the circulation speed of the electrolyte in the target electrolytic cell is increased.

[0013] During the dilution and circulation rate enhancement operations, the temperature of the electrolyte in the target electrolyzer and / or the pressure of the oxygen-side separator used for storing oxygen are monitored.

[0014] Based on the results of temperature monitoring and / or pressure monitoring, the dilution operation and the enhanced circulation rate are controlled to achieve dynamic adjustment of the electrolyte in the target electrolyzer and control of the temperature of the electrolyte in the target electrolyzer and / or the pressure of the oxygen-side separator.

[0015] In a preferred embodiment of this application, in the aforementioned hydrogen production control method based on multi-parameter dynamic adjustment, the step of controlling the dilution operation and the enhanced circulation rate operation based on the results of temperature monitoring and / or pressure monitoring to achieve dynamic adjustment of the electrolyte in the target electrolyzer and control of the temperature of the electrolyte in the target electrolyzer and / or the pressure of the oxygen-side separator includes:

[0016] Based on the results of temperature monitoring and / or pressure monitoring, the tuning parameters of the proportional-integral-derivative controller are determined according to the fuzzy control strategy to achieve dynamic determination of the tuning parameters, wherein the tuning parameters include proportional coefficient, integral coefficient and derivative coefficient.

[0017] Based on the determined tuning parameters, the corresponding parameters in the dilution operation and the enhanced circulation rate operation are controlled to achieve dynamic adjustment of the electrolyte in the target electrolyzer and control of the temperature of the electrolyte in the target electrolyzer and / or the pressure of the oxygen-side separator.

[0018] In a preferred embodiment of this application, in the aforementioned hydrogen production control method based on multi-parameter dynamic adjustment, the step of determining whether the target electrolyzer is in a low current density state includes:

[0019] Based on the principles of ensuring that the maximum number of electrolytic cells are in a high current density state and prioritizing that the target electrolytic cell is in a high current density state, multiple electrolytic cells are controlled to determine whether the target electrolytic cell is in a low current density state. The multiple electrolytic cells include the target electrolytic cell. The control results include the operation and / or shutdown of the electrolytic cells. The current density of the electrolytic cells in a high current density state is greater than that of the electrolytic cells in a low current density state, and the control results corresponding to the electrolytic cells in both the high current density state and the low current density state are considered as operation.

[0020] In a preferred embodiment of this application, in the aforementioned hydrogen production control method based on multi-parameter dynamic adjustment, the step of controlling multiple electrolyzers based on the principles of ensuring the maximum number of electrolyzers are in a high current density state and prioritizing the target electrolyzer in a high current density state, to determine whether the target electrolyzer is in a low current density state, includes:

[0021] Determine the ratio between the current supply demand for hydrogen and the rated load of multiple electrolyzers;

[0022] Based on the ratio, and in accordance with the principles of ensuring that the maximum number of electrolytic cells are in a high current density state and prioritizing that the target electrolytic cell is in a high current density state, the multiple electrolytic cells are controlled to determine whether the target electrolytic cell is in a low current density state.

[0023] In a preferred embodiment of this application, in the aforementioned hydrogen production control method based on multi-parameter dynamic adjustment, the step of controlling the multiple electrolyzers based on the ratio, according to the principles of ensuring that the maximum number of electrolyzers are in a high current density state and prioritizing that the target electrolyzer is in a high current density state, to determine whether the target electrolyzer is in a low current density state, includes:

[0024] When the ratio is less than a predetermined first threshold, it is determined that the current density of the target electrolytic cell is less than a preset current density, and each of the electrolytic cells is controlled to shut down, and it is determined that the target electrolytic cell is not in a low current density state, wherein the preset current density is equal to the lower limit of the current density range corresponding to the low current density state.

[0025] When the ratio is greater than or equal to the first threshold and less than a predetermined second threshold, it is determined that the current density of the target electrolytic cell is in the current density range corresponding to the low current density state, and each electrolytic cell other than the target electrolytic cell is controlled to be shut down, and the target electrolytic cell is determined to be in the low current density state, wherein the second threshold is greater than the first threshold.

[0026] When the ratio is greater than or equal to the second threshold, control the operation of the target electrolytic cell, control the operation or shutdown of each electrolytic cell other than the target electrolytic cell, and determine that the target electrolytic cell is not in a low current density state.

[0027] In a preferred embodiment of this application, in the aforementioned hydrogen production control method based on multi-parameter dynamic adjustment, the steps of controlling the target electrolyzer to operate and controlling the operation or shutdown of each electrolyzer other than the target electrolyzer when the ratio is greater than or equal to the second threshold, and determining that the target electrolyzer is not in a low current density state, include:

[0028] When the ratio is greater than or equal to the second threshold and less than a predetermined third threshold, the target electrolytic cell is controlled to operate, and each electrolytic cell other than the target electrolytic cell is controlled to shut down. The target electrolytic cell is determined to be in a medium current density state, wherein the third threshold is greater than the second threshold, and the lower limit of the current density range corresponding to the medium current density state is greater than the upper limit of the current density range corresponding to the low current density state.

[0029] When the ratio is greater than or equal to the third threshold and less than a predetermined fourth threshold, the target electrolytic cell is controlled to operate, and each electrolytic cell other than the target electrolytic cell is controlled to shut down. The target electrolytic cell is determined to be in a high current density state, wherein the fourth threshold is greater than the third threshold, and the lower limit of the current density range corresponding to the high current density state is greater than the upper limit of the current density range corresponding to the medium current density state.

[0030] When the ratio is greater than or equal to the fourth threshold, the target electrolytic cell and at least one other electrolytic cell are controlled to operate, and when other electrolytic cells exist, the other electrolytic cells are controlled to shut down. It is also determined that the target electrolytic cell is in a high current density state and the other operating electrolytic cells are in a high current density state or a medium current density state, respectively. The first threshold, the second threshold, the third threshold, and the fourth threshold are determined based at least on the number of the plurality of electrolytic cells.

[0031] This application also provides a hydrogen production control device based on multi-parameter dynamic adjustment, comprising:

[0032] An electrolyzer state determination module is used to determine whether a target electrolyzer is in a low current density state, wherein oxygen and hydrogen are generated through the electrolysis of water in the target electrolyzer.

[0033] An electrolyte concentration detection module is used to detect the concentration of the electrolyte in the target electrolytic cell when the target electrolytic cell is in a low current density state, and obtain the current concentration value.

[0034] The electrolyte adjustment module is used to dilute the electrolyte in the target electrolytic cell along the direction where the concentration of the diluted electrolyte approaches the reference concentration value when the current concentration value is greater than the predetermined reference concentration value, and to increase the circulation speed of the electrolyte in the target electrolytic cell, so as to achieve dynamic adjustment of the electrolyte in the target electrolytic cell.

[0035] Based on the above, this application also provides an electronic device, including:

[0036] Memory, used to store computer programs;

[0037] A processor connected to the memory is used to execute the computer program stored in the memory to implement the above-described hydrogen production control method based on multi-parameter dynamic adjustment.

[0038] Based on the above, this application also provides a computer-readable storage medium storing a computer program that, when executed, performs the various steps of the hydrogen production control method based on multi-parameter dynamic adjustment.

[0039] The hydrogen production control method, apparatus, equipment, and medium based on multi-parameter dynamic adjustment provided in this application first determines whether the target electrolyzer is in a low current density state. Second, when the target electrolyzer is in a low current density state, the concentration of the electrolyte in the target electrolyzer is detected to obtain the current concentration value. Then, when the current concentration value is greater than a reference concentration value, the electrolyte in the target electrolyzer is diluted along the direction where the concentration value of the diluted electrolyte approaches the reference concentration value, and the circulation rate of the electrolyte in the target electrolyzer is increased to achieve dynamic adjustment of the electrolyte in the target electrolyzer. Based on the above, since the electrolyte concentration is too high under low current density conditions, it will increase the solubility of hydrogen and oxygen in the electrolyte. Therefore, by diluting, the solubility of hydrogen and oxygen in the electrolyte can be reduced, maintaining ion migration efficiency, enhancing electrode surface reactivity, and improving hydrogen evolution efficiency. This operation greatly reduces the amount of gas in the solution, reducing the safety risk of excessive hydrogen in the gas-liquid mixture from the source. Furthermore, by increasing the circulation volume of the electrolyte in the electrolytic cell and accelerating the circulation speed, it is possible to prevent bubble retention, reduce the contact time between the gas and the electrode, lower the risk of electrode passivation and corrosion, and increase the electrode life. Based on this, it is possible to improve the problems of reduced energy efficiency under low load, insufficient gas purity, and equipment corrosion in the existing technology, and improve the safety, reliability, and lifespan of the equipment under low load. Attached Figure Description

[0040] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings.

[0041] Figure 1 A structural block diagram of an electronic device provided in an embodiment of this application.

[0042] Figure 2 This is a schematic flowchart of a hydrogen production control method based on multi-parameter dynamic adjustment provided in an embodiment of this application.

[0043] Figure 3 This is a schematic diagram of a system in which multiple electrolyzers share a single gas-liquid separation circulation system, as provided in an embodiment of this application.

[0044] Figure 4 The system control flowchart for multiple electrolytic cells sharing a single gas-liquid separation circulation system provided in the embodiments of this application is shown.

[0045] Figure 5 This is a schematic diagram of multi-parameter adjustment based on fuzzy control provided in an embodiment of this application.

[0046] Figure 6 This is a block diagram of a hydrogen production control device based on multi-parameter dynamic adjustment, provided in an embodiment of this application. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0048] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0049] like Figure 1 As shown in the figure, an embodiment of this application provides an electronic device. The electronic device may include a memory, a processor, and a hydrogen production control device based on multi-parameter dynamic adjustment.

[0050] Specifically, the memory and the processor are electrically connected to enable data transmission or interaction. For example, the memory and the processor can be electrically connected via one or more communication buses or signal lines. The hydrogen production control device based on multi-parameter dynamic adjustment includes at least one software functional module stored in the memory in the form of software or firmware. The processor is used to execute executable computer programs stored in the memory, such as the software functional modules and computer programs included in the hydrogen production control device based on multi-parameter dynamic adjustment, to implement the hydrogen production control method based on multi-parameter dynamic adjustment provided in the embodiments of this application.

[0051] Optionally, the memory may be, but is not limited to, random access memory (RAM), read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), etc.

[0052] Optionally, the processor may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), a system on chip (SoC), etc.; it may also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0053] Understandable. Figure 1 The structure shown is for illustrative purposes only; the electronic device may also include components that are more advanced than those shown. Figure 1 The more or fewer components shown, or having the same Figure 1 The different configurations shown may include, for example, a communication unit for exchanging information with other devices.

[0054] Combination Figure 2 This application also provides a hydrogen production control method based on multi-parameter dynamic adjustment, applicable to the aforementioned electronic device. The method steps defined in the process of the hydrogen production control method based on multi-parameter dynamic adjustment can be implemented by the electronic device. The following will describe... Figure 2 The specific process shown will be explained in detail.

[0055] Step S110: Determine whether the target electrolytic cell is in a low current density state.

[0056] In this embodiment, the electronic device can determine whether the target electrolyzer is in a low current density state, i.e., a relatively small current density. In the target electrolyzer, oxygen and hydrogen are produced through the electrolysis of water.

[0057] Step S120: When the target electrolytic cell is in a low current density state, the concentration of the electrolyte in the target electrolytic cell is detected to obtain the current concentration value.

[0058] In this embodiment, the electronic device can detect the concentration of the electrolyte in the target electrolytic cell when the target electrolytic cell is in a low current density state, and obtain the current concentration value. For example, the electrolyte can be a potassium hydroxide (KOH) solution. The current concentration value is the actual measured value, generally 20%-30%, but can also be other values.

[0059] Step S130: When the current concentration value is greater than a predetermined reference concentration value, the electrolyte in the target electrolytic cell is diluted along the direction in which the concentration value of the diluted electrolyte approaches the reference concentration value, and the circulation speed of the electrolyte in the target electrolytic cell is increased to achieve dynamic adjustment of the electrolyte in the target electrolytic cell.

[0060] In this embodiment of the application, after obtaining the current concentration value, the electronic device can, when the current concentration value is greater than a predetermined reference concentration value, that is, when the electrolyte concentration is high, perform a dilution operation on the electrolyte in the target electrolytic cell along the direction where the concentration value of the diluted electrolyte approaches the reference concentration value, that is, reduce the concentration value of the electrolyte, and increase the circulation speed of the electrolyte in the target electrolytic cell, so as to achieve dynamic adjustment of the electrolyte in the target electrolytic cell, that is, real-time dynamic adjustment according to the current concentration value.

[0061] Based on the above, since excessively high electrolyte concentration under low current density conditions increases the solubility of hydrogen and oxygen in the electrolyte, dilution can reduce their solubility, maintain ion migration efficiency, enhance electrode surface reactivity, and improve hydrogen evolution efficiency. This significantly reduces the amount of gas in the solution, mitigating the safety risks associated with excessive hydrogen in the gas-liquid mixture. Furthermore, increasing the electrolyte circulation rate in the electrolytic cell prevents bubble retention, reduces the contact time between gas and electrodes, lowers the risk of electrode passivation and corrosion, and increases electrode lifespan. Therefore, this technology can address existing issues such as decreased energy efficiency, insufficient gas purity, and equipment corrosion under low load (low current density) conditions, improving the safety, reliability, and lifespan of the equipment under low load conditions.

[0062] Firstly, regarding step S110, it should be noted that the specific method for determining whether the target electrolytic cell is in a low current density state is not limited and can be selected according to actual needs.

[0063] For example, in an alternative implementation, in order to fully ensure the safety and efficiency of the electrolytic cell operation, the above step S110 may include step S111, the specific content of which is as follows.

[0064] Step S111: Based on the principle of ensuring that the maximum number of electrolytic cells are in a high current density state and the principle of prioritizing that the target electrolytic cell is in a high current density state, multiple electrolytic cells are controlled to determine whether the target electrolytic cell is in a low current density state.

[0065] In this embodiment, multiple electrolytic cells can be controlled based on the principles of ensuring the maximum number of electrolytic cells are in a high current density state and prioritizing the target electrolytic cell in a high current density state, to determine whether the target electrolytic cell is in a low current density state. The multiple electrolytic cells include the target electrolytic cell. The control results include the operation and / or shutdown of the electrolytic cells. The current density of an electrolytic cell in a high current density state is greater than that of an electrolytic cell in a low current density state, and the control results for both the high and low current density electrolytic cells are considered as operation. In other words, the target electrolytic cell is preferentially controlled to be in a high current density state, and the target electrolytic cell can be any one of the multiple electrolytic cells. Based on this, through the aforementioned control principles, the demand load can be concentrated on the designated first electrolytic cell (i.e., the target electrolytic cell) to achieve a high current density at its rated current. Then, it is determined whether the demand load can enable the second electrolytic cell to achieve a high current density at its rated current. If so, it is further determined whether the demand load can enable the third electrolytic cell to achieve a high current density at its rated current, and so on. In this way, tiered control of current density can be achieved, solving the problem of electrode passivation and corrosion caused by operation at low current densities, and extending the service life of the electrodes. That is, the electrodes of the operating electrolytic cells are kept in a high current density environment as much as possible. For the electrodes of the electrolytic cells that must operate at low current densities due to insufficient load, the flow rate and concentration of the electrolyte can be dynamically changed through the aforementioned steps S120 and S130, which can also ensure safety and high efficiency under low load conditions.

[0066] It is understood that in step S111 above, the specific method of controlling multiple electrolytic cells is not limited and can be selected according to actual needs. For example, in an alternative implementation, in order to ensure the safety and high efficiency of operation while effectively supplying the demand load through the control of multiple electrolytic cells, step S111 above may further include steps S111a and S111b, the specific contents of each step are as follows.

[0067] Step S111a: Determine the ratio between the current hydrogen supply demand and the rated load of the multiple electrolyzers.

[0068] In this embodiment, the ratio between the current hydrogen supply demand and the rated load of multiple electrolyzers can be determined. The rated load of the multiple electrolyzers refers to the sum of the loads at which the current density of all electrolyzers is at its maximum (under safe operating conditions). Thus, the maximum value of this ratio can be 100%, meaning the current supply demand is the maximum supply demand. The minimum value of this ratio can be 0, meaning the current supply demand is the minimum supply demand, i.e., all electrolyzers are shut down.

[0069] Step S111b: Based on the ratio, and in accordance with the principle of ensuring that the maximum number of electrolytic cells are in a high current density state and the principle of ensuring that the target electrolytic cell is preferentially in a high current density state, the multiple electrolytic cells are controlled to determine whether the target electrolytic cell is in a low current density state.

[0070] In this embodiment of the application, after determining the ratio between the supply and demand of the load, the multiple electrolytic cells can be controlled based on the ratio, according to the principle of making the maximum number of electrolytic cells in a high current density state and the principle of making the target electrolytic cell preferentially in a high current density state, so as to determine whether the target electrolytic cell is in a low current density state.

[0071] It is understood that the specific method of controlling the multiple electrolytic cells in step S111b above is not limited. For example, in an alternative embodiment, in order to control the multiple electrolytic cells with high precision, step S111b above may further include steps b1, b2 and b3, the specific contents of each step are as follows.

[0072] Step b1: When the ratio is less than a predetermined first threshold, determine that the current density of the target electrolytic cell is less than a preset current density, and control each electrolytic cell to shut down, and determine that the target electrolytic cell is not in a low current density state.

[0073] In this embodiment, when the ratio is less than a predetermined first threshold, it can be determined that the current density of the target electrolytic cell is less than a preset current density. Furthermore, each electrolytic cell is controlled to shut down, and it is determined that the target electrolytic cell is not in a low current density state. The preset current density is equal to the lower limit of the current density range corresponding to the low current density state. In other words, the current demand load is very small, insufficient to support an electrolytic cell operating in a low current density state. Therefore, considering energy consumption and other issues, each electrolytic cell can be directly shut down. In this way, it can be determined that the target electrolytic cell is not in a low current density state.

[0074] Step b2: When the ratio is greater than or equal to the first threshold and less than a predetermined second threshold, determine that the current density of the target electrolytic cell is in the current density range corresponding to the low current density state, and control each electrolytic cell other than the target electrolytic cell to shut down, and determine that the target electrolytic cell is in the low current density state.

[0075] In this embodiment, when the ratio is greater than or equal to the first threshold and less than a predetermined second threshold, it can be determined that the current density of the target electrolytic cell is in the current density range corresponding to a low current density state. Furthermore, each electrolytic cell other than the target electrolytic cell can be shut down, and the target electrolytic cell can be determined to be in a low current density state. The second threshold is greater than the first threshold. That is, the current demand load is relatively small, which can support one electrolytic cell operating in a low current density state. Therefore, the target electrolytic cell can be controlled to operate and determined to be in a low current density state, and other electrolytic cells can be controlled to shut down.

[0076] Step b3: When the ratio is greater than or equal to the second threshold, control the target electrolytic cell to operate, and control each electrolytic cell other than the target electrolytic cell to operate or shut down, and determine that the target electrolytic cell is not in a low current density state.

[0077] In this embodiment, when the ratio is greater than or equal to the second threshold, the target electrolytic cell can be controlled to operate, and each electrolytic cell other than the target electrolytic cell can be controlled to operate or shut down. It can also be determined that the target electrolytic cell is not in a low current density state. That is, the current demand load is relatively large, which can support one electrolytic cell to operate in a medium current density state or a high current density state, or it can also support at least one other electrolytic cell to operate in a medium current density state or a high current density state. The specific control can be determined based on the ratio.

[0078] It is understood that in step b3 above, the specific method of controlling the target electrolytic cell and other electrolytic cells is not limited. For example, in an alternative embodiment, step b3 above may further include the following:

[0079] When the ratio is greater than or equal to the second threshold and less than a predetermined third threshold, the target electrolytic cell is controlled to operate, and each electrolytic cell other than the target electrolytic cell is controlled to shut down. The target electrolytic cell is determined to be in a medium current density state, wherein the third threshold is greater than the second threshold, and the lower limit of the current density range corresponding to the medium current density state is greater than the upper limit of the current density range corresponding to the low current density state.

[0080] When the ratio is greater than or equal to the third threshold and less than a predetermined fourth threshold, the target electrolytic cell is controlled to operate, and each electrolytic cell other than the target electrolytic cell is controlled to shut down. The target electrolytic cell is determined to be in a high current density state, wherein the fourth threshold is greater than the third threshold, and the lower limit of the current density range corresponding to the high current density state is greater than the upper limit of the current density range corresponding to the medium current density state.

[0081] When the ratio is greater than or equal to the fourth threshold, the target electrolytic cell and at least one other electrolytic cell are controlled to operate. If other electrolytic cells exist, they are controlled to shut down. It is determined that the target electrolytic cell is in a high current density state, and the other operating electrolytic cells are in either a high current density state or a medium current density state. The first threshold, second threshold, third threshold, and fourth threshold are determined at least based on the number of electrolytic cells. For example, in a specific application scenario with four electrolytic cells, the first threshold can be 5%, the second threshold can be 10%, the third threshold can be 15%, and the fourth threshold can be 25%. Furthermore, the current density range corresponding to the low current density state can be (0.1 A / cm², 0.2 A / cm²), the current density range corresponding to the medium current density state can be (0.2 A / cm², 0.3 A / cm²), and the current density range corresponding to the high current density state can be (0.3 A / cm², 0.5 A / cm²).

[0082] Secondly, regarding step S120, it should be noted that the specific method for detecting the concentration of the electrolyte in the target electrolytic cell is not limited. For example, in an alternative embodiment, the concentration of the electrolyte in the target electrolytic cell can be detected by a concentration detection device deployed in the target electrolytic cell and transmitted to the electronic device to obtain the current concentration value.

[0083] Thirdly, regarding step S130, it should be noted that the specific method of dynamically adjusting the electrolyte in the target electrolytic cell is not limited and can be selected according to actual needs.

[0084] For example, in an alternative implementation, in order to ensure the reliability of the dynamic adjustment of the electrolyte in the target electrolyzer, the above step S130 may further include steps S131, S132 and S133, the specific contents of each step are as follows.

[0085] Step S131: When the current concentration value is greater than a predetermined reference concentration value, the electrolyte in the target electrolytic cell is diluted along the direction in which the concentration value of the diluted electrolyte approaches the reference concentration value, and the circulation speed of the electrolyte in the target electrolytic cell is increased.

[0086] In this embodiment of the application, when the current concentration value (e.g., 30%) is greater than a predetermined reference concentration value (e.g., 20%), the electrolyte in the target electrolytic cell can be diluted in a direction that brings the concentration of the diluted electrolyte closer to the reference concentration value, and the circulation speed of the electrolyte in the target electrolytic cell can be increased.

[0087] Step S132: During the dilution operation and the circulation rate enhancement operation, the temperature of the electrolyte in the target electrolyzer and / or the pressure of the oxygen-side separator used for storing oxygen are monitored.

[0088] In this embodiment, during the dilution and circulation rate enhancement operations, the temperature of the electrolyte in the target electrolyzer and / or the pressure of the oxygen-side separator used for storing oxygen can be monitored. For example, in one alternative embodiment, the electrolyte temperature is monitored, but the pressure of the oxygen-side separator is not monitored. As another example, in yet another alternative embodiment, the electrolyte temperature is not monitored, but the pressure of the oxygen-side separator is monitored. Still another example, in yet another alternative embodiment, the electrolyte temperature is monitored, and the pressure of the oxygen-side separator is monitored.

[0089] Step S133: Based on the results of temperature monitoring and / or pressure monitoring, control is exercised over the dilution operation and the enhanced circulation rate operation to achieve dynamic adjustment of the electrolyte in the target electrolyzer and control of the temperature of the electrolyte in the target electrolyzer and / or the pressure of the oxygen-side separator.

[0090] In this embodiment of the application, after obtaining the results of temperature monitoring and / or pressure monitoring, the dilution operation and the enhanced circulation rate operation can be controlled based on the results of temperature monitoring and / or pressure monitoring to achieve dynamic adjustment of the electrolyte in the target electrolyzer and control of the temperature of the electrolyte in the target electrolyzer and / or the pressure of the oxygen-side separator, that is, to control the degree of dilution and the degree of enhancement of circulation rate, so that the temperature of the electrolyte and / or the pressure of the oxygen-side separator meet the requirements after control.

[0091] It is understood that the specific method of controlling the dilution operation and the enhanced circulation rate operation in step S133 above is not limited. For example, in an alternative embodiment, in order to achieve precise control of temperature and / or pressure, step S133 above may further include steps S133a and S133b, the specific contents of each step of which are described below.

[0092] Step S133a: Based on the results of temperature monitoring and / or pressure monitoring, the tuning parameters of the proportional-integral-derivative controller are determined according to the fuzzy control strategy to achieve dynamic determination of the tuning parameters.

[0093] In this embodiment, the tuning parameters of the proportional-integral-derivative (PID) controller can be determined based on the results of temperature monitoring and / or pressure monitoring, according to a fuzzy control strategy, to achieve dynamic determination of the tuning parameters. The tuning parameters include the proportional coefficient, integral coefficient, and derivative coefficient. Taking temperature as an example, in fuzzy control, the three parameters (Kp, Ki, Kd, ​​i.e., proportional coefficient, integral coefficient, and derivative coefficient) of the PID controller can be dynamically adjusted based on the current temperature error (i.e., the difference between the current temperature and the set temperature) and the rate of change of the error (i.e., the derivative of the error). The specific steps are as follows:

[0094] (1) Fuzzification of error and rate of change of error

[0095] Error: The difference between the current temperature and the set temperature. Based on the magnitude of the error, it is classified as "negative large", "negative small", "zero", "positive small", "positive large", etc.

[0096] Error change rate: The rate at which the error changes, i.e. the amount of change in the error. Based on its rate of increase or decrease, it is classified as "increasing" or "decreasing".

[0097] (2) Fuzzy rule design

[0098] Based on actual control requirements, fuzzy rules are designed to adjust PID parameters, for example:

[0099] If the error is large and the rate of change is large, a larger proportional gain Kp may be needed for a faster response; if the error is small and the rate of change is small, a smaller proportional gain Kp may be needed to prevent system overshoot; if the error does not change significantly over a long period of time, an integral gain Ki may be needed to eliminate small errors that have accumulated over a long period of time; if the error changes very rapidly, a differential gain Kd may be needed to predict the trend of the error in advance and reduce overshoot.

[0100] (3) Fuzzy reasoning and defuzzification

[0101] These rules are processed using a fuzzy inference engine to obtain the adjusted PID parameters Kp, Ki, and Kd. Finally, through the defuzzification process, specific values ​​are obtained as real-time parameters for the PID controller.

[0102] Among them, the advantages of fuzzy control for dynamic adjustment of PID parameters are:

[0103] By introducing fuzzy control, the parameters Kp, Ki, and Kd of the PID controller can be dynamically adjusted, thereby significantly improving system performance. Specifically: fuzzy control can adjust the PID parameters in a timely manner based on temperature errors and trends, preventing overshoot caused by excessively fast responses; by adjusting the PID parameters in real time, fuzzy control enables the system to respond quickly and recover to the set value when faced with disturbances or changes; fuzzy control can adapt to environmental changes, temperature fluctuations, or external disturbances, avoiding problems caused by the system's inability to cope with changes due to fixed PID parameters; fuzzy control does not rely on precise mathematical models but dynamically adjusts through empirical rules, thus offering greater flexibility in handling nonlinear and uncertain systems.

[0104] Step S133b: Based on the determined tuning parameters, control the corresponding parameters in the dilution operation and the enhanced circulation rate operation to achieve dynamic adjustment of the electrolyte in the target electrolyzer and control the temperature of the electrolyte in the target electrolyzer and / or the pressure of the oxygen-side separator.

[0105] In this embodiment of the application, after the dynamic determination of the tuning parameters is achieved, the corresponding parameters in the dilution operation and the enhanced circulation rate operation can be controlled based on the determined tuning parameters, so as to achieve dynamic adjustment of the electrolyte in the target electrolyzer and control of the temperature of the electrolyte in the target electrolyzer and / or the pressure of the oxygen-side separator.

[0106] It should be noted that the specific working principle of controlling the electrolyte temperature and / or the oxygen-side separator pressure through dynamic adjustment of the electrolyte is as follows:

[0107] When operating under low load, dynamically adjusting the electrolyte concentration can improve safety, reliability, and electrode life. However, adding deionized water (dilution) and increasing the electrolyte circulation in the electrolyzer can lead to a drop in overall temperature, thus affecting efficiency. Therefore, a fuzzy control strategy is needed to comprehensively consider the overall situation. When the temperature is about to drop, measures such as appropriately adjusting the amount of diluted electrolyte entering the electrolyzer (reducing the amount of cold water entering the electrolyzer) and slightly reducing the flow rate can be taken (to reduce the heat carried away by the gas from the electrolyzer). Similarly, to maintain pressure, for example, when the pressure is about to drop, the amount of diluted electrolyte entering the electrolyzer can be reduced (under constant load, an increase in temperature leads to a decrease in electrolysis voltage and an increase in electrolysis current, P (load capacity) = UI, increasing gas production, Q (gas production) = I (current)n (number of chambers)η (efficiency) / 2390, thus increasing pressure). Therefore, such complex and ever-changing situations require the full utilization of a large amount of engineering experience through fuzzy control strategies. By dynamically controlling the concentration and circulation volume of the electrolyte and other parameters through the real-time state values ​​of various parameters, the overall reliability under low-load operation can be enhanced. This is something that traditional PID linear control systems cannot handle.

[0108] Regarding the aforementioned hydrogen production control method based on multi-parameter dynamic adjustment, this application also provides a specific application scenario, such as... Figure 3 This is a system diagram illustrating a single gas-liquid separation circulation system shared by multiple electrolyzers. It details the control strategy for operation under low load using four electrolyzers and one gas-liquid separation circulation system (referred to as a 4-to-1 system), aiming to improve safety, reliability, and lifespan. Figure 3 The names of the devices corresponding to each symbol are shown in the table below.

[0109]

[0110] Combination Figure 4 The specific operation process of the above system is as follows:

[0111] When the power supply of new energy sources (i.e. the demand load) is greater than 100% of the rated load, electrolytic cells 1-4 all operate at full load simultaneously, pumps 1-4 all operate, valves V1-V4, V11-V41, and V12-V42 are all open, T1-T4 measure the temperature of each electrolytic cell, P measures the pressure of the equipment, L1-L4 measure the flow rate of each electrolytic cell, and concentration 1-concentration 4 measure the concentration value of each electrolytic cell.

[0112] When the power supply from new energy sources is between 50% and 100% of the rated load, it is considered a medium load condition. A control strategy of proportionally reducing the current or shutting down one electrolytic cell can be adopted, as long as the operating electrolytic cells are kept at a high current density, with the overall current density within 0.3 A / cm² to 0.5 A / cm². For example, when the power supply drops from 100% to 60% of the rated load, electrolytic cells 1 through 4 simultaneously reduce their current, with the current density in each cell decreasing from 0.5 A / cm² to 0.3 A / cm², while all pumps and valves remain in normal operating condition. However, when the power supply drops from 60% to 50% of the rated load, to ensure all electrolytic cells operate at a high current density, one electrolytic cell needs to be shut down to maintain the operation of the other three. For example, electrolytic cell 4 can be shut down, pump 4 can be turned off, and valves V4, V41, and V42 can be closed. The other electrolytic cells 1-3 are operating normally, and the corresponding pumps and valves are in normal working condition. At this time, the current density of electrolytic cells 1-3 is between 0.3 A / cm² and 0.4 A / cm².

[0113] In addition to employing a current density stratified control strategy during low-load operation, a multi-parameter dynamic real-time adjustment of electrolyte concentration is also used to ensure the overall safety and reliability of the equipment, ultimately extending its lifespan. Specifically:

[0114] When the power supply from the new energy source is between 25% and 50% of the rated load, equivalent to the rated load of two electrolytic cells, two of the four electrolytic cells shut down due to insufficient load. Then, adhering to the principle of ensuring high current density operation as much as possible, one electrolytic cell is initially controlled at its rated load (equivalent to high current density), while the other electrolytic cell's current density decreases as the overall load decreases. Simultaneously, the electrolyte circulation rate is increased, achieving precise control through a fuzzy control strategy, rather than the conventional linear curve PID control. For example, when the power supply drops from 50% to 25% of the rated load, electrolytic cells 3 and 4 are shut down, along with pumps 3 and 4, and valves V3, V4, V31, V41, V32, and V42. Electrolytic cells 1 and 2 operate normally, with their corresponding pumps and valves functioning normally. When the load decreases from 50% to 40% of the rated load, the current density in electrolytic cell 1 is 0.5 A / cm², and in electrolytic cell 2, the current density decreases from 0.5 A / cm² to 0.3 A / cm² as the load decreases. When the load decreases from 40% to 35% of the rated load, the current density in electrolytic cell 1 is 0.5 A / cm², and in electrolytic cell 2, the current density decreases from 0.3 A / cm² to 0.2 A / cm² as the load decreases. At this point, by changing the operating frequency of pump 2, the circulation rate of the electrolyte in electrolytic cell 2 is increased (through fuzzy control strategy, the flow rate of electrolyte in electrolytic cell 2 can be accurately and quickly increased from 55 m³ / cm²). 3 / h increased to 65m 3 / h), the alkaline solution flow rate of electrolytic cell No. 1 remains unchanged at 55m 3 / h. Increasing the circulation rate of the electrolyte in Electrolytic Cell No. 2 can quickly carry the gas generated in Electrolytic Cell No. 2 (small chamber) out of the electrolytic cell into the gas-liquid separation circulation system. Therefore, the gas can leave the active center of the electrode quickly, reducing the resistance value caused by bubble retention, improving electrolysis efficiency and energy saving. In addition, due to the short bubble residence time, the risk of electrode passivation and corrosion is reduced. After the gas-liquid mixture enters the gas-liquid separation and circulation system, due to the 4-to-1 configuration, the entire system is designed based on the gas production and gas-liquid separation capacity under the rated load of four electrolyzers. Furthermore, the size of the separation tank is designed according to the separation capacity of four electrolyzers under their rated load. Therefore, when the gas-liquid mixture from two electrolyzers is sufficient to meet the requirements of the four-electrolyte gas-liquid separation circulation system, and the residence time of the mixed gas and liquid in the separation tank is long enough to ensure complete separation, there is no risk of incomplete gas-liquid separation leading to the recirculation of hydrogen-oxygen mixtures back to the electrolyzers along with the liquid. Simultaneously, there are no safety issues arising from excessive hydrogen in the oxygen. When the load decreases from 35% of the rated load to 25% of the rated load, the current density in electrolyzer 2 is 0.2 A / cm², and in electrolyzer 1, the current density decreases from 0.5 A / cm² to 0.3 A / cm² as the load decreases.

[0115] When the power supply from the new energy source is between 10% and 25% of the rated load, it is equivalent to the rated load capacity of one electrolytic cell. Therefore, three of the four electrolytic cells will shut down due to insufficient load. Then, the remaining electrolytic cell will be operated according to the current density that the current load can provide. For example, when the power supply drops from 25% of the rated load to 10% of the rated load, electrolytic cells No. 2, No. 3, and No. 4 will be shut down first, and pumps 2, 3, and 4 will be closed, along with valves V2, V3, V4, V21, V31, V41, V22, V32, and V42. Electrolytic cell No. 1 will operate normally, and the corresponding pumps and valves will be in normal working condition. The current density of electrolytic cell No. 1 can be maintained at 0.5 A / cm² at 25% of the rated load, 0.4 A / cm² at 20% of the rated load, 0.3 A / cm² at 15% of the rated load, and 0.2 A / cm² at 10% of the rated load. Similarly, when the current density decreases from 0.3 A / cm² to 0.2 A / cm², or when the load decreases from 15% to 10% of the rated load, the operating frequency of pump 1 is changed. This increases the circulation rate of the electrolyte in electrolytic cell No. 1 (through fuzzy control strategy, the flow rate of the electrolyte in electrolytic cell No. 1 can be accurately and quickly increased from 55 m³ / cm²). 3 / h increased to 65m 3( / h) to improve equipment safety and ensure stable operation, because this is the gas production and gas-liquid separation volume of one electrolytic cell. In the separation circulation system corresponding to four electrolytic cells, the margin is larger, the residence time is longer, and the gas-liquid separation is more thorough.

[0116] When the power supply from new energy sources is between 5% and 10% of the rated load, as the current density decreases from 0.2 A / cm² to 0.1 A / cm², simply increasing the electrolyte circulation rate in the electrolyzer is insufficient to address the safety, reliability, and electrode lifespan issues. A combination of methods, including dynamic real-time adjustment and fuzzy control of multi-parameter electrolyte concentration, and increasing the electrolyte circulation rate, is necessary to ensure the safety and reliability of the equipment under low load conditions and to extend electrode lifespan. When the current density drops below 0.2 A / cm², electrolyzer 1 operates at a low current density. At this point, the electrolyte concentration in electrolyzer 1 is monitored (normal value 30%). If the concentration exceeds 20%, deionized water is injected via a water pump to dilute the electrolyte and bring its concentration back to 20%. Through fuzzy control, the electrolyte concentration can be precisely and quickly controlled at 20%. Because high-concentration electrolytes increase the solubility of hydrogen and oxygen in the solution, diluting the electrolyte with water reduces the solubility of these gases. Furthermore, simultaneously reducing the electrolyte concentration maintains ion migration efficiency, enhances the reactivity of the electrode surface, and improves hydrogen evolution efficiency. This operation significantly reduces the amount of gas in the solution, thereby mitigating the safety risks of excessive hydrogen in the gas-liquid mixture from the source.

[0117] In addition, increasing the circulation rate of the electrolyte in the electrolytic cell during the overall dilution process can accelerate the circulation speed, prevent air bubbles from accumulating, reduce the contact time between the gas and the electrode, lower the risk of electrode passivation and corrosion, and increase the electrode life.

[0118] However, it's important to note that dynamically adjusting the electrolyte concentration requires the coordinated adjustment of multiple parameters. For example, during normal low-load operation, it's crucial to maintain stable temperature and pressure. Temperature determines system efficiency, while pressure determines the usability of subsequent gas processing steps. Therefore, while focusing solely on improving safety, reliability, and electrode lifespan through dynamic electrolyte concentration adjustment under low-load conditions, the addition of deionized water and increased electrolyte circulation in the electrolyzer can lead to a drop in overall system temperature, impacting overall equipment efficiency. Therefore, a comprehensive approach using fuzzy control strategies is necessary, combining... Figure 5When the temperature needs to decrease, measures such as reducing the amount of diluted electrolyte entering the electrolytic cell and appropriately reducing the flow rate can be taken (to reduce the amount of heat carried away by the gas from the electrolytic cell). Additionally, when the pressure needs to decrease, the amount of diluted electrolyte entering the cell can also be reduced (under constant load, an increase in temperature can lower the electrolysis voltage, increase the electrolysis current, increase the gas production, and increase the pressure).

[0119] When the power supply from new energy sources is less than 5% of the rated load, and the current density is less than 0.1 A / cm², the operation of all electrolytic cells can be stopped.

[0120] In addition, to facilitate understanding the relationship between load and current density in the above system, please refer to the following table:

[0121]

[0122] Based on this, the above method has the following advantages compared to existing technologies:

[0123]

[0124] In other words, based on the above method, by introducing a multi-parameter dynamic electrolyte concentration adjustment mechanism, it breaks through the traditional single-parameter adjustment or fixed concentration mode, filling the gap in equipment safety and energy consumption optimization under lower loads. Furthermore, the adoption of a current density hierarchical control strategy can avoid the electrode corrosion problems that affect equipment lifespan under low load operation, as is common in existing technologies. In addition, the use of fuzzy control strategy, nonlinear system, and parameter self-tuning not only improves equipment control accuracy but also enhances the reliability of equipment operation under low loads.

[0125] Combination Figure 6 This application also provides a hydrogen production control device based on multi-parameter dynamic adjustment, applicable to the aforementioned electronic equipment. The multi-parameter dynamic adjustment hydrogen production control device may include an electrolyzer state determination module, an electrolyte concentration detection module, and an electrolyte adjustment module.

[0126] The electrolyzer state determination module is used to determine whether the target electrolyzer is in a low current density state, wherein oxygen and hydrogen are generated in the target electrolyzer through the electrolysis of water. In this embodiment of the application, the electrolyzer state determination module can be used to perform... Figure 2 The relevant content regarding the electrolytic cell state determination module in step S110 can be found in the previous description of step S110.

[0127] The electrolyte concentration detection module is used to detect the concentration of the electrolyte in the target electrolytic cell when the target electrolytic cell is in a low current density state, and obtain the current concentration value. In this embodiment of the application, the electrolyte concentration detection module can be used to perform... Figure 2 The relevant content regarding the electrolyte concentration detection module in step S120 shown can be found in the previous description of step S120.

[0128] The electrolyte adjustment module is used to dilute the electrolyte in the target electrolytic cell along a direction where the concentration of the diluted electrolyte approaches the reference concentration when the current concentration value is greater than a predetermined reference concentration value, and to increase the circulation speed of the electrolyte in the target electrolytic cell, thereby achieving dynamic adjustment of the electrolyte in the target electrolytic cell. In this embodiment, the electrolyte adjustment module can be used to perform... Figure 2 The relevant content regarding the electrolyte adjustment module in step S130 shown can be found in the previous description of step S130.

[0129] In this embodiment of the application, corresponding to the above-described hydrogen production control method based on multi-parameter dynamic adjustment applied to the electronic device, a computer-readable storage medium is also provided, which stores a computer program that executes the various steps of the hydrogen production control method based on multi-parameter dynamic adjustment when the computer program is run.

[0130] The steps executed by the aforementioned computer program during runtime will not be described in detail here, but can be found in the explanation of the hydrogen production control method based on multi-parameter dynamic adjustment mentioned above.

[0131] In summary, the hydrogen production control method, apparatus, equipment, and medium based on multi-parameter dynamic adjustment provided in this application firstly determines whether the target electrolyzer is in a low current density state; secondly, when the target electrolyzer is in a low current density state, the concentration of the electrolyte in the target electrolyzer is detected to obtain the current concentration value; then, when the current concentration value is greater than the reference concentration value, the electrolyte in the target electrolyzer is diluted along the direction where the concentration value of the diluted electrolyte approaches the reference concentration value, and the circulation speed of the electrolyte in the target electrolyzer is increased to achieve dynamic adjustment of the electrolyte in the target electrolyzer. Based on the above, since the electrolyte concentration is too high under low current density conditions, it will increase the solubility of hydrogen and oxygen in the electrolyte. Therefore, by diluting, the solubility of hydrogen and oxygen in the electrolyte can be reduced, maintaining ion migration efficiency, enhancing the electrode surface reactivity, and improving hydrogen evolution efficiency. This operation greatly reduces the amount of gas in the solution, thereby reducing the safety risk of excessive hydrogen in the gas-liquid mixture from the source. Furthermore, by increasing the circulation volume of the electrolyte in the electrolytic cell and accelerating the circulation speed, it is possible to prevent bubble retention, reduce the contact time between the gas and the electrode, lower the risk of electrode passivation and corrosion, and increase the electrode life. Based on this, it is possible to improve the problems of reduced energy efficiency under low load, insufficient gas purity, and equipment corrosion in the existing technology, and improve the safety, reliability, and lifespan of the equipment under low load.

[0132] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can also be implemented in other ways. The apparatus and method embodiments described above are merely illustrative. For example, the flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than those marked in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram and / or flowchart, and combinations of blocks in block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

[0133] In addition, the functional modules in the various embodiments of this application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0134] If the aforementioned functions are implemented as software functional modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, electronic device, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks. It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. In the absence of further restrictions, an element defined by the phrase "comprising a..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0135] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A hydrogen production control method based on multi-parameter dynamic adjustment, characterized in that, include: Determine whether the target electrolyzer is in a low current density state, wherein oxygen and hydrogen are produced by the electrolysis of water in the target electrolyzer; When the target electrolytic cell is in a low current density state, the concentration of the electrolyte in the target electrolytic cell is detected to obtain the current concentration value; When the current concentration value is greater than a predetermined reference concentration value, the electrolyte in the target electrolytic cell is diluted along the direction in which the concentration value of the diluted electrolyte approaches the reference concentration value, and the circulation rate of the electrolyte in the target electrolytic cell is increased. During the dilution and circulation rate increase operations, the temperature of the electrolyte in the target electrolytic cell and / or the pressure of the oxygen-side separator used for storing oxygen are monitored. Based on the results of the temperature and / or pressure monitoring, the dilution and circulation rate increase operations are controlled to achieve dynamic adjustment of the electrolyte in the target electrolytic cell and control of the temperature of the electrolyte in the target electrolytic cell and / or the pressure of the oxygen-side separator. The step of determining whether the target electrolytic cell is in a low current density state includes: Based on the principles of ensuring that the maximum number of electrolytic cells are in a high current density state and prioritizing that the target electrolytic cell is in a high current density state, multiple electrolytic cells are controlled to determine whether the target electrolytic cell is in a low current density state. The multiple electrolytic cells include the target electrolytic cell. The control results include the operation and / or shutdown of the electrolytic cells. The current density of the electrolytic cells in a high current density state is greater than that of the electrolytic cells in a low current density state, and the control results corresponding to the electrolytic cells in both the high current density state and the low current density state are considered as operation.

2. The hydrogen production control method based on multi-parameter dynamic adjustment according to claim 1, characterized in that, The steps of controlling the dilution operation and the enhanced circulation rate based on temperature monitoring results and / or pressure monitoring results to achieve dynamic adjustment of the electrolyte in the target electrolyzer and control of the temperature of the electrolyte in the target electrolyzer and / or the pressure of the oxygen-side separator include: Based on the results of temperature monitoring and / or pressure monitoring, the tuning parameters of the proportional-integral-derivative controller are determined according to the fuzzy control strategy to achieve dynamic determination of the tuning parameters, wherein the tuning parameters include proportional coefficient, integral coefficient and derivative coefficient. Based on the determined tuning parameters, the corresponding parameters in the dilution operation and the enhanced circulation rate operation are controlled to achieve dynamic adjustment of the electrolyte in the target electrolyzer and control of the temperature of the electrolyte in the target electrolyzer and / or the pressure of the oxygen-side separator.

3. The hydrogen production control method based on multi-parameter dynamic adjustment according to claim 1, characterized in that, The step of controlling multiple electrolytic cells based on the principles of ensuring the maximum number of electrolytic cells are in a high current density state and prioritizing the target electrolytic cell in a high current density state, to determine whether the target electrolytic cell is in a low current density state, includes: Determine the ratio between the current supply demand for hydrogen and the rated load of multiple electrolyzers; Based on the ratio, and in accordance with the principles of ensuring that the maximum number of electrolytic cells are in a high current density state and prioritizing that the target electrolytic cell is in a high current density state, the multiple electrolytic cells are controlled to determine whether the target electrolytic cell is in a low current density state.

4. The hydrogen production control method based on multi-parameter dynamic adjustment according to claim 3, characterized in that, The step of controlling the multiple electrolytic cells based on the ratio, according to the principles of ensuring that the maximum number of electrolytic cells are in a high current density state and prioritizing that the target electrolytic cell is in a high current density state, to determine whether the target electrolytic cell is in a low current density state, includes: When the ratio is less than a predetermined first threshold, it is determined that the current density of the target electrolytic cell is less than a preset current density, and each of the electrolytic cells is controlled to shut down, and it is determined that the target electrolytic cell is not in a low current density state, wherein the preset current density is equal to the lower limit of the current density range corresponding to the low current density state. When the ratio is greater than or equal to the first threshold and less than a predetermined second threshold, it is determined that the current density of the target electrolytic cell is in the current density range corresponding to the low current density state, and each electrolytic cell other than the target electrolytic cell is controlled to be shut down, and the target electrolytic cell is determined to be in the low current density state, wherein the second threshold is greater than the first threshold. When the ratio is greater than or equal to the second threshold, control the operation of the target electrolytic cell, control the operation or shutdown of each electrolytic cell other than the target electrolytic cell, and determine that the target electrolytic cell is not in a low current density state.

5. The hydrogen production control method based on multi-parameter dynamic adjustment according to claim 4, characterized in that, The steps of controlling the target electrolytic cell to operate and controlling the operation or shutdown of each electrolytic cell other than the target electrolytic cell when the ratio is greater than or equal to the second threshold, and determining that the target electrolytic cell is not in a low current density state, include: When the ratio is greater than or equal to the second threshold and less than a predetermined third threshold, the target electrolytic cell is controlled to operate, and each electrolytic cell other than the target electrolytic cell is controlled to shut down. The target electrolytic cell is determined to be in a medium current density state, wherein the third threshold is greater than the second threshold, and the lower limit of the current density range corresponding to the medium current density state is greater than the upper limit of the current density range corresponding to the low current density state. When the ratio is greater than or equal to the third threshold and less than a predetermined fourth threshold, the target electrolytic cell is controlled to operate, and each electrolytic cell other than the target electrolytic cell is controlled to shut down. The target electrolytic cell is determined to be in a high current density state, wherein the fourth threshold is greater than the third threshold, and the lower limit of the current density range corresponding to the high current density state is greater than the upper limit of the current density range corresponding to the medium current density state. When the ratio is greater than or equal to the fourth threshold, the target electrolytic cell and at least one other electrolytic cell are controlled to operate, and when other electrolytic cells exist, the other electrolytic cells are controlled to shut down. It is also determined that the target electrolytic cell is in a high current density state and the other operating electrolytic cells are in a high current density state or a medium current density state, respectively. The first threshold, the second threshold, the third threshold, and the fourth threshold are determined based at least on the number of the plurality of electrolytic cells.

6. A hydrogen production control device based on multi-parameter dynamic adjustment, characterized in that, include: An electrolyzer state determination module is used to determine whether a target electrolyzer is in a low current density state, wherein oxygen and hydrogen are generated through the electrolysis of water in the target electrolyzer. An electrolyte concentration detection module is used to detect the concentration of the electrolyte in the target electrolytic cell when the target electrolytic cell is in a low current density state, and obtain the current concentration value. An electrolyte adjustment module is used to dilute the electrolyte in the target electrolytic cell along a direction where the concentration of the diluted electrolyte approaches the reference concentration value when the current concentration value is greater than a predetermined reference concentration value, and to increase the circulation speed of the electrolyte in the target electrolytic cell. During the dilution and circulation speed enhancement operations, the module monitors the temperature of the electrolyte in the target electrolytic cell and / or the pressure of the oxygen-side separator used for storing oxygen. Based on the results of the temperature and / or pressure monitoring, the module controls the dilution and circulation speed enhancement operations to achieve dynamic adjustment of the electrolyte in the target electrolytic cell and control of the temperature of the electrolyte in the target electrolytic cell and / or the pressure of the oxygen-side separator. The step of determining whether the target electrolytic cell is in a low current density state includes: Based on the principles of ensuring that the maximum number of electrolytic cells are in a high current density state and prioritizing that the target electrolytic cell is in a high current density state, multiple electrolytic cells are controlled to determine whether the target electrolytic cell is in a low current density state. The multiple electrolytic cells include the target electrolytic cell. The control results include the operation and / or shutdown of the electrolytic cells. The current density of the electrolytic cells in a high current density state is greater than that of the electrolytic cells in a low current density state, and the control results corresponding to the electrolytic cells in both the high current density state and the low current density state are considered as operation.

7. An electronic device, characterized in that, include: Memory, used to store computer programs; A processor connected to the memory is used to execute the computer program stored in the memory to implement the hydrogen production control method based on multi-parameter dynamic adjustment as described in any one of claims 1-5.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium contains a computer program that, when executed, performs the hydrogen production control method based on multi-parameter dynamic adjustment as described in any one of claims 1-5.

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