Electrolytic hydrogen production system control method, device, equipment and medium

Abstract

The device is mainly used in the technical field of electrolytic hydrogen production. The invention discloses a control method of an electrolytic hydrogen production system, which comprises the following steps of: firstly, acquiring an alternating current power signal by the system, and updating the conversion efficiency between alternating current and direct current in an electrolysis process; and then, according to the alternating current power and the updated conversion efficiency, direct current power required during electrolytic hydrogen production is calculated. In the electrolysis process, the system detects the pile parameters to determine the pile voltage, and calculates the required target current value based on the direct current power and the pile voltage. And finally, a control mode is set according to the target current value, and a control instruction is sent to the electrolytic hydrogen production system so as to control the production amount of hydrogen. According to the technical scheme, the dynamic adjustment capability of the system can be improved, power grid alternating current power changes can be quickly responded, and the utilization rate of renewable energy sources can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electrolytic hydrogen production, and in particular to a control method, device, equipment and medium for an electrolytic hydrogen production system. Background Art

[0002] In the related field, the traditional hydrogen production system control method mainly relies on Faraday's law of electrolysis to obtain the required electricity from the power grid by adjusting the current. However, with the application of renewable energy in the hydrogen production process, its rapidly changing power characteristics have posed new challenges to the traditional hydrogen production system control method. The traditional hydrogen production system control method is difficult to adapt to the rapid changes in power characteristics in terms of absorption rate and response time, resulting in low energy utilization efficiency and waste of resources. Summary of the invention

[0003] The present invention provides a control method, device, equipment and medium for an electrolytic hydrogen production system, which can improve the dynamic regulation capability of the system, quickly respond to changes in power grid AC power, and help improve the utilization rate of renewable energy.

[0004] The present invention provides a control method for an electrolytic hydrogen production system, the method comprising: In response to a control request, acquiring an AC power of an AC signal input to a target hydrogen production system by electrolysis; When the target hydrogen production by electrolysis system produces hydrogen by electrolysis, updating the AC / DC conversion efficiency between AC power and DC power in the target hydrogen production by electrolysis system; Based on the AC power and the updated AC / DC conversion efficiency, determining the DC power of the target hydrogen production system when performing hydrogen production by electrolysis; During the process of the target hydrogen production by electrolysis system, detecting the stack in the target hydrogen production by electrolysis system, and determining the stack voltage according to the detected stack parameters; Determining a target current value required for the target hydrogen production system to produce hydrogen by electrolysis based on the DC power and the stack voltage; determining a control mode based on the target current value; The control instruction corresponding to the control mode is sent to the target electrolytic hydrogen production system to control the target electrolytic hydrogen production system to perform electrolytic hydrogen production and produce the amount of hydrogen corresponding to the target current value.

[0005] Optionally, the stack parameters include stack operating temperature, stack operating time, and ohmic voltage drop of an electrolytic chamber in the stack; During the process of the target hydrogen production system producing hydrogen by electrolysis, detecting the stack in the target hydrogen production system, and determining the stack voltage according to the detected stack parameters, including: During the process of the target hydrogen production system producing hydrogen by electrolysis, detecting the stack in the target hydrogen production system by electrolysis to obtain the stack operating temperature, stack operating time and ohmic voltage drop; Based on the operating temperature of the battery stack, updating the battery stack attenuation coefficient of the battery stack; The stack voltage is determined based on the stack operating temperature, the stack operating time, the ohmic voltage drop, and the updated stack attenuation coefficient.

[0006] Optionally, updating the stack attenuation coefficient of the stack based on the stack operating temperature includes: When the battery stack is at the battery stack operating temperature, detecting the battery stack to obtain an actual voltage of the battery stack; Based on the functional relationship between the stack operating temperature, the stack voltage and the actual voltage of the stack, an updated stack attenuation coefficient is determined.

[0007] Optionally, determining a target current value required for the target hydrogen production system to produce hydrogen by electrolysis based on the DC power and the stack voltage includes: Based on the AC / DC conversion efficiency and the stack attenuation coefficient, generating a data mapping relationship between the first data storage unit and the second data storage unit; When the target electrolytic hydrogen production system produces hydrogen by electrolysis, the AC power and the stack operating temperature value are stored in the first data storage unit; By using the data mapping relationship between the first data storage unit and the second data storage unit, a current measurement value is generated in the second data storage unit, and the current measurement value is used as the target current value.

[0008] Optionally, when the target hydrogen production by electrolysis system produces hydrogen by electrolysis, updating the AC / DC conversion efficiency between AC power and DC power in the target hydrogen production by electrolysis system includes: Acquire a rectifier of the target electrolytic hydrogen production system, and call AC / DC conversion efficiency curve data corresponding to the rectifier; Determining a DC power instruction corresponding to the AC power based on the AC / DC conversion efficiency curve data; Sending the DC power instruction to the target electrolytic hydrogen production system to control the DC current of the target electrolytic hydrogen production system during hydrogen production by electrolysis; Acquiring the actual direct current power of the target electrolytic hydrogen production system when controlling electrolytic hydrogen production, and determining the actual AC-DC conversion efficiency according to the actual direct current power; Based on the actual AC-DC conversion efficiency, the AC-DC conversion efficiency curve data is updated to determine an updated AC-DC conversion efficiency.

[0009] Optionally, sending the control instruction corresponding to the control mode to the target electrolytic hydrogen production system to control the target electrolytic hydrogen production system to perform electrolytic hydrogen production and produce the amount of hydrogen corresponding to the target current value includes: When the control mode is the first mode, obtaining an actual voltage of the stack in the target electrolytic hydrogen production system during hydrogen production by electrolysis; Comparing the actual voltage with the stack voltage, and adjusting the target current value according to the comparison result until the difference between the actual voltage and the stack voltage is within a preset value range; According to the adjusted target current value, the target electrolysis hydrogen production system is controlled to produce an amount of hydrogen corresponding to the adjusted target current value.

[0010] Optionally, sending the control instruction corresponding to the control mode to the target electrolytic hydrogen production system to control the target electrolytic hydrogen production system to perform electrolytic hydrogen production and produce the amount of hydrogen corresponding to the target current value includes: When the control mode is the second mode, monitoring the change of the AC power of the target hydrogen production system during the hydrogen production process by electrolysis to determine the change amplitude of the AC power; Based on the mapping relationship between the change amplitude of the AC power and the adjustment amplitude of the target current value, determining the adjustment amplitude of the target current value and adjusting the target current value; According to the adjusted target current value, the target electrolysis hydrogen production system is controlled to produce an amount of hydrogen corresponding to the adjusted target current value.

[0011] The present invention also provides a control device for an electrolytic hydrogen production system, the device comprising: An acquisition module, configured to acquire, in response to a control request, an AC power of an AC signal input to a target electrolytic hydrogen production system; A first calculation module is used to update the AC-DC conversion efficiency between AC power and DC power in the target hydrogen production system when the target hydrogen production system is producing hydrogen by electrolysis; A second calculation module is used to determine the DC power of the target hydrogen production system when it performs hydrogen production by electrolysis based on the AC power and the updated AC / DC conversion efficiency; a third measuring module, configured to detect the stack of the target electrolytic hydrogen production system during the process of electrolytic hydrogen production by the target electrolytic hydrogen production system, and determine the stack voltage according to the detected stack parameters; A fourth calculation module is used to determine the target current value required for the target electrolytic hydrogen production system to produce hydrogen by electrolysis based on the DC power and the stack voltage; A selection module, configured to determine a control mode based on the target current value; The output module is used to send the control instruction corresponding to the control mode to the target electrolytic hydrogen production system to control the target electrolytic hydrogen production system to perform electrolytic hydrogen production and produce the amount of hydrogen corresponding to the target current value.

[0012] The present invention also provides an electronic device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the above-mentioned method for controlling the hydrogen production system by electrolysis when executing the computer program.

[0013] The present invention also provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the above-mentioned method for controlling the hydrogen production system by electrolysis is implemented.

[0014] The present invention has at least the following beneficial effects: In the technical solution of the present application, the AC power signal and its conversion efficiency with DC power are continuously monitored and updated. This real-time monitoring and updating capability enables the system to quickly respond to changes in the external power grid or power supply, thereby adapting to rapid changes in power characteristics; during the electrolysis process, the system continuously detects the stack parameters to determine the stack voltage. This monitoring can ensure that the electrolyzer operates at the optimal operating point, further improving the response speed and efficiency of the system; based on the calculated DC power and the determined stack voltage, the required target current value is calculated, and the control mode is set according to this target current value. This control mode setting based on real-time data can ensure that the electrolysis hydrogen production system can quickly adapt to load changes and improve the flexibility and efficiency of the system; finally, the control instructions are sent to the electrolysis hydrogen production system to control the production of hydrogen. This control method can reduce energy waste caused by slow response and improve the system's absorption rate. The technical solution of the present application solves the adaptability problem of traditional methods when power characteristics change rapidly, improves energy utilization efficiency, and reduces resource waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the technical solution of the present invention and do not constitute a limitation on the technical solution of the present invention.

[0016] Figure 1 The invention is a flow chart of steps of a method for controlling a hydrogen production system by electrolysis; Figure 2It is a flowchart of the specific steps of step S104 in the control method of the electrolysis hydrogen production system; Figure 3 A flowchart of specific steps for calculating the attenuation coefficient of a fuel cell stack in a control method for a hydrogen production system by electrolysis according to an embodiment; Figure 4 A flowchart of specific steps for calculating AC / DC conversion efficiency in a control method for an electrolytic hydrogen production system according to an embodiment; Figure 5 It is a structural schematic diagram of a control device for an electrolytic hydrogen production system; Figure 6 It is a structural diagram of an electronic device. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0018] Before describing the embodiments of the technical solution of the present application in detail, it is necessary to explain the technical terms involved in the technical solution of the present application: Electrolysis hydrogen production system products refer to products that use power and water as raw materials and utilize electrochemical principles to produce hydrogen.

[0019] Hydrogen-electricity coupling refers to the application of organically combining the power system and electrolysis to produce hydrogen, and studying the application of products or engineering technologies that match power conversion, electrochemistry, and post-processing processes.

[0020] The absorption rate refers to the proportion of green electricity resources actually used in hydrogen production equipment, that is, the proportion of AC power consumed by the electrolysis system to the AC power delivered.

[0021] System response refers to the time required from the issuance of a new power dispatch instruction from the EMS upstream to the stabilization of the electrolysis characteristics of the hydrogen production system.

[0022] It should be noted that traditional hydrogen production systems usually use output as the core indicator of load control. Through the input of output signals (current signals), according to Faraday's law of electrolysis, the corresponding power demand is obtained from the power grid. In the terminology of the power industry, this process is called "source follows load", which means actively obtaining the required power resources from the power grid. However, from the perspective of the power industry, the water electrolysis process is essentially a high-energy consumption unit. Ideally, it should be able to achieve energy conversion and utilization just like electric lights, thereby maximizing the conversion of excess electrical energy into hydrogen. This conversion can not only be used as a chemical raw material, but also for energy storage, and then reversely supply power to the power grid through fuel cell technology, or be applied to high-value-added mobile vehicles, electronic gases and other fields to achieve diversified energy utilization.

[0023] Realizing "load follows source", that is, transforming the water electrolysis system into a flexible load-side unit, is a key technical challenge currently faced by the water electrolysis industry. This involves the realization of the concept of hydrogen-electric coupling, the core of which relies on the direct drive technology of AC power. The core of the direct drive technology of AC power is the current conversion algorithm and the multi-unit allocation strategy. The current conversion algorithm is a technology that converts AC power into the DC current signal required by the hydrogen production system through a mathematical iterative method. The algorithm is designed to improve the utilization rate of the hydrogen production system while ensuring the stability and responsiveness of the system operation.

[0024] However, with the application of renewable energy in the hydrogen production process, its rapidly changing power characteristics have posed new challenges to the control methods of traditional hydrogen production systems. Traditional hydrogen production systems have significant limitations when facing the rapid power changes of renewable energy, which are mainly manifested in the following aspects: First, the response speed of traditional hydrogen production system control methods is slow: it cannot respond to changes in AC power in real time, resulting in the inability to adjust the hydrogen production load in time; second, the absorption rate of traditional hydrogen production system control methods is low, resulting in the inability to flexibly adjust the load, the utilization rate of renewable energy is limited, and energy waste is increased; third, in traditional hydrogen production systems, the increase in hydrogen production load is usually step-by-step, lacking flexibility and real-time performance.

[0025] In view of the above problems, the present invention provides a control method, device, equipment and medium for an electrolytic hydrogen production system, the core idea of ​​which is to adjust the hydrogen production load in real time to match the changes in AC power. In this technical solution, the real-time adjustment of the hydrogen production load is achieved through advanced control algorithms to respond to the dynamic changes in AC power; by optimizing the load control strategy, the utilization rate of renewable energy is significantly improved and energy waste is reduced; the method can quickly respond to changes in grid power and improve the dynamic adjustment capability of the system.

[0026] In order to realize the technical solution of the above-mentioned control method, device, equipment and medium of the electrolysis hydrogen production system, the present invention also provides the following embodiments.

[0027] Please refer to Figure 1 , Figure 1 The invention is a flow chart of steps of a method for controlling a hydrogen production system by electrolysis.

[0028] This embodiment provides a method for controlling a hydrogen production system by electrolysis, including: S101 . In response to a control request, acquiring the AC power of an AC signal input to a target hydrogen production system by electrolysis.

[0029] S102. When the target hydrogen production by electrolysis system produces hydrogen by electrolysis, the AC / DC conversion efficiency between AC power and DC power in the target hydrogen production by electrolysis system is updated.

[0030] S103: Based on the AC power and the updated AC / DC conversion efficiency, determine the DC power of the target hydrogen production system when performing hydrogen production by electrolysis.

[0031] S104. During the process of the target hydrogen production system producing hydrogen by electrolysis, the stack in the target hydrogen production system is detected, and the stack voltage is determined according to the detected stack parameters.

[0032] S105. Determine a target current value required for the target hydrogen production system to produce hydrogen by electrolysis based on the DC power and the stack voltage.

[0033] S106 . Determine a control mode based on the target current value.

[0034] S107, sending a control instruction corresponding to the control mode to the target electrolytic hydrogen production system to control the target electrolytic hydrogen production system to perform electrolytic hydrogen production and produce a hydrogen amount corresponding to the target current value.

[0035] It can be understood that the target electrolytic hydrogen production system is controlled by the control instruction to obtain AC power from the power grid, and then the rectifier of the target electrolytic hydrogen production system outputs DC current according to demand, so that the voltage of the electrolyzer of the target electrolytic hydrogen production system passively follows the output DC current. First, according to Faraday's law: Q = n ∙ z ∙ F Under standard conditions (0°C, 101.325 kPa), 1Nm3 / h of H 2 The theoretical power required is:

[0036] The hydrogen production can be calculated based on the current value:

[0037] Among them, the hydrogen production setting mode (hydrogen production is proportional to DC current), q is the hydrogen production, the unit is [Nm3 / h]; I is the DC working current passing through the electrolysis chamber, the unit is [A]; Ncell is the number of electrolysis chambers; η is the current efficiency, η=1-Faradaic Losses, the unit is [%].

[0038] In some embodiments, the stack parameters include stack operating temperature, stack operating time, and ohmic voltage drop of electrolytic cells in the stack.

[0039] In some embodiments, the stack parameters include ohmic voltage drop, activation polarization, concentration polarization, mass transfer polarization, temperature effect, pressure effect, and electrolytic cell structure.

[0040] It can be understood that in this embodiment, the AC power signal and its conversion efficiency with DC power are continuously monitored and updated. This real-time monitoring and updating capability enables the system to quickly respond to changes in the external power grid or power supply, thereby adapting to rapid changes in power characteristics; during the electrolysis process, the system continuously detects the stack parameters to determine the stack voltage. This monitoring can ensure that the electrolyzer operates at the optimal operating point, further improving the response speed and efficiency of the system; based on the calculated DC power and the determined stack voltage, the required target current value is calculated, and the control mode is set according to this target current value. This control mode setting based on real-time data can ensure that the electrolysis hydrogen production system can quickly adapt to load changes and improve the flexibility and efficiency of the system; finally, the control instruction is sent to the electrolysis hydrogen production system to control the production of hydrogen. This control method can reduce energy waste caused by slow response and improve the system's absorption rate. This embodiment solves the adaptability problem of traditional methods when power characteristics change rapidly, improves energy utilization efficiency, and reduces resource waste.

[0041] In some embodiments, based on the DC power and the stack voltage, determining the target current value required for the target electrolytic hydrogen production system to produce hydrogen by electrolysis includes: Based on the AC / DC conversion efficiency and the stack attenuation coefficient, a data mapping relationship is generated between the first data storage unit and the second data storage unit; when the target electrolysis hydrogen production system performs electrolysis hydrogen production, the AC power and the stack operating temperature value are saved in the first data storage unit; using the data mapping relationship between the first data storage unit and the second data storage unit, a current measurement value is generated in the second data storage unit, and the current measurement value is used as the target current value.

[0042] In this embodiment, based on the first conversion of the current of the hydrogen-electric coupling application of the hydrogen production system, a polarization curve and a quadratic function are constructed: Using Faraday's law, it can be obtained that the hydrogen production is proportional to the current passing through the electrolyzer. Considering that the electrochemical polarization curve describes the relationship between current density and electrode potential. Constructing a quadratic function to fit the polarization curve can help calculate the current value of the electrolysis system under a specific AC power.

[0043] Please refer to Figure 2 , Figure 2 The present invention is a flowchart of the specific steps of step S104 in the control method of the electrolysis hydrogen production system.

[0044] In some embodiments, step S104 includes: S201. During the process of electrolyzing hydrogen production in the target hydrogen production system, the stack in the target hydrogen production system is detected to obtain the stack operating temperature, stack operating time and ohmic voltage drop.

[0045] S202. Update the stack attenuation coefficient of the stack based on the stack operating temperature.

[0046] S203, determining the stack voltage based on the stack operating temperature, the stack operating time, the ohmic voltage drop, and the updated stack attenuation coefficient.

[0047] It can be understood that the most important two variables affecting the voltage of the electrolysis chamber of the stack in the target electrolysis hydrogen production system are the current density and the stack operating temperature, from which the function of the electrolysis chamber voltage can be derived as: U cell = (E O (I / S stack ) + E (T stack )+E others )*k+Ta*Degradation Rate Among them, E O (I / S stack ) is the ohmic voltage drop, E(T stack ) is the operating temperature of the electrolytic cell, E others are other influencing factors, k is the electrolytic cell structure, Ta is the stack operating temperature, and Degradation Rate is the stack attenuation coefficient.

[0048] According to the above function, a relationship about the voltage of each electrolytic chamber in the stack can be constructed according to the stack operating temperature, stack operating time, ohmic voltage drop and updated stack attenuation coefficient, so as to further derive the relationship of the stack voltage, and then the stack voltage can be determined based on the stack operating temperature, stack operating time, ohmic voltage drop and updated stack attenuation coefficient.

[0049] From this, it can be deduced that the DC power of a single electrolytic chamber is P cell = U cell *I, the DC power of the entire battery stack is P stack =N stack * P cell , and the AC power of the battery stack is P Stack =P AC *η AC-DC .

[0050] In some embodiments, step S202 includes: When the stack is at the stack operating temperature, the stack is detected to obtain the actual voltage of the stack; based on the functional relationship between the stack operating temperature, the stack voltage and the actual voltage of the stack, an updated stack attenuation coefficient is determined.

[0051] It should be noted that the stack attenuation coefficient, Degradation Rate, is generally based on theoretical values, but the actual stack attenuation is more complicated. It varies with operating conditions, such as the number of starts and stops, operating temperature, and the conductivity of electrolyzed water. Different conditions lead to different aging rates. Therefore, a fixed value is set, and the final value output by the algorithm is different, resulting in low algorithm quality and reduced key technical indicators such as fluctuating load followability and absorptive rate.

[0052] In some embodiments, according to the stack attenuation coefficient Degradation Rate=(U DC '-U DC ) / ΔT, where U DC ', ΔT and U DC They all change dynamically with the operating time and operating conditions, so the attenuation coefficient itself is a dynamically changing parameter. Calculating the dynamic attenuation coefficient based on the measured parameters can effectively ensure the load following and absorption capacity of the battery stack and improve the dynamic response characteristics of the system.

[0053] It is understandable that the electrolyzer of the target electrolytic hydrogen production system will age, and the present invention will calculate the cumulative electrolyzer aging based on real-time measurement feedback: by monitoring the performance parameters of the electrolyzer, such as voltage, current, etc., the aging coefficient of the electrolyzer is calculated in real time. The updated stack attenuation coefficient is determined and updated to the storage area in real time for subsequent intelligent algorithm calls.

[0054] Please refer to Figure 3 , Figure 3 The present invention is a flowchart of the specific steps for calculating the attenuation coefficient of the fuel cell stack in the control method of the hydrogen production system by electrolysis according to an embodiment.

[0055] In this embodiment, the figure describes a technical solution for performance monitoring and aging management of a fuel cell stack (usually used in fuel cells or electrolyzers). The specific steps are as follows: (301) Set the initial parameters of the stack, such as open circuit voltage (E0), activation voltage (E A )wait.

[0056] (302) Measure the temperature change (△T) of the fuel cell stack during operation.

[0057] (303) Obtain the actual operating temperature of the fuel cell stack.

[0058] (304) According to the formula: ((E0(I / S stack ) + E(T stack ) + E others ) * k + Ta * DegradationRate) to calculate the theoretical voltage of the fuel cell stack.

[0059] (305) Directly measure the actual voltage U of the battery stack DC .

[0060] (306) Through the formula Deg: = (U Dc ' - U DC ) / △T) to calculate the aging coefficient, where U Dc ' is the calculated voltage, U DC is the actual voltage currently measured and △T is the temperature change.

[0061] This embodiment evaluates the performance change and aging degree of the battery stack by monitoring the voltage and temperature of the battery stack and calculating the battery stack attenuation coefficient. This is crucial for maintaining the stability of the battery stack and extending its service life. In this way, performance degradation can be discovered in time and corresponding maintenance measures can be taken.

[0062] In some embodiments, step S102 includes: Acquire a rectifier of a target hydrogen production electrolysis system, and call AC / DC conversion efficiency curve data corresponding to the rectifier; determine a DC power instruction corresponding to the AC power based on the AC / DC conversion efficiency curve data; send the DC power instruction to the target hydrogen production electrolysis system to control the DC current of the target hydrogen production electrolysis system when producing hydrogen by electrolysis; acquire the actual DC power of the target hydrogen production electrolysis system when controlling hydrogen production by electrolysis, and determine the actual AC / DC conversion efficiency based on the actual DC power; update the AC / DC conversion efficiency curve data based on the actual AC / DC conversion efficiency to determine the updated AC / DC conversion efficiency.

[0063] In this embodiment, the conversion of AC power to DC power required by the electrolysis system involves power factor efficiency, transformer loss, rectifier damage, intermediate cable loss, etc. Setting a fixed conversion efficiency cannot meet the application of hydrogen-electric coupling, and real-time measurement feedback records the power conversion efficiency: monitor the input and output of the power supply, and calculate the power conversion efficiency in real time. The conversion efficiency records of different load points are stored, and updated in real time for the next operation call.

[0064] Please refer to Figure 4 , Figure 4 The present invention is a flowchart of specific steps for calculating AC / DC conversion efficiency in a control method for an electrolytic hydrogen production system according to an embodiment.

[0065] This embodiment involves the conversion of alternating current (AC) to direct current (DC), and includes efficiency calculation and power feedback. The following are the main steps of the technical solution in this embodiment: (401) The target electrolysis hydrogen production system is started and initialized.

[0066] (402) The target electrolysis hydrogen production system is subject to remote control.

[0067] (403) The target electrolysis hydrogen production system reads or sets the AC power command PAC, which is used to control the AC power input to the system.

[0068] (404) In some cases, the target electrolysis hydrogen production system may set the AC power command to 0, which may be for safety reasons or to reset the power command before starting the conversion.

[0069] (405) The target electrolysis hydrogen production system provides the option of using IGBT (insulated gate bipolar transistor) or SCR (silicon controlled rectifier) ​​for rectification, both of which are methods of converting alternating current to direct current.

[0070] (406) The control device of the target electrolysis hydrogen production system updates the efficiency curves related to the transformer and the AC to DC conversion, which helps the system to adjust its efficiency model according to the current operating conditions.

[0071] (407) The control device of the target electrolytic hydrogen production system calculates the DC power (P DC ), usually through AC power (P AC ) multiplied by a conversion factor (n), which may include the rectification efficiency and the transformer ratio.

[0072] (408) The control device of the target electrolytic hydrogen production system obtains the actual conversion efficiency of the target electrolytic hydrogen production system.

[0073] (409) The control device of the target electrolytic hydrogen production system outputs a DC power instruction to the target electrolytic hydrogen production system based on the calculated DC power and efficiency.

[0074] (410) The target electrolysis hydrogen production system outputs direct current after rectification by controlling the IGBT or SCR rectifier.

[0075] This embodiment provides an automated power conversion and control process to ensure that the system can effectively convert AC power to DC power according to the set power command and the selected rectification technology, and provide real-time feedback and adjustments to optimize efficiency and power output. Such a system may be used in power supply, power transmission, electric vehicle charging stations, or other applications requiring precise power control.

[0076] In some embodiments, step S107 includes: When the control mode is the first mode, the actual voltage of the fuel cell stack in the target electrolytic hydrogen production system during hydrogen production by electrolysis is obtained; the actual voltage is compared with the fuel cell stack voltage, and the target current value is adjusted according to the comparison result until the difference between the actual voltage and the fuel cell stack voltage is within a preset value range; according to the adjusted target current value, the target electrolytic hydrogen production system is controlled to produce an amount of hydrogen corresponding to the adjusted target current value.

[0077] In some embodiments, if the actual voltage is less than the stack voltage, the target current value is decreased until the difference between the actual voltage and the stack voltage is within a first preset value range; if the actual voltage is greater than the stack voltage, the target current value is increased until the difference between the actual voltage and the stack voltage is within a second preset value range.

[0078] Optionally, in order to allow for a certain iteration error, the dead zone is set to 0.5% (rated voltage), and the specific implementation is as follows: When Ucell > U’cell, the current (I) is decreased until the difference between Ucell and U’cell is less than plus or minus 0.5%. The system will operate stably at this iterative current.

[0079] When Ucell < U’cell, the current (I) is increased until the difference between Ucell and U’cell is less than plus or minus 0.5%. The system will operate stably at this iterative current.

[0080] It can be understood that in this embodiment, the ideal voltage of the stack is calculated according to the formula U cell = (E O (I / S stack ) + E(T stack ) + E others ) * k + Ta * Degradation Rate, and compared with the actually measured voltage. Then, through iterative approximation, the actual voltage is made to approach the calculated stack voltage as much as possible, so as to obtain better conversion efficiency and reduce power consumption. This embodiment can dynamically adjust the operating point of the electrolyzer to adapt to the fluctuations of the AC power supply.

[0081] In some embodiments, step S107 includes: When the control mode is the second mode, monitor the change in the AC power during the electrolytic hydrogen production process of the target electrolytic hydrogen production system to determine the change range of the AC power; based on the mapping relationship between the change range of the AC power and the adjustment range of the target current value, determine the adjustment range of the target current value and adjust the target current value; according to the adjusted target current value, control the target electrolytic hydrogen production system to produce the hydrogen volume corresponding to the adjusted target current value.

[0082] In some embodiments, according to the change range of the AC power being ΔP AC ‘ / P AC , ΔP AC ‘ / P ACIndicates the power change ratio. According to the mapping relationship between the change range of the AC power and the adjustment range of the target current value, the adjustment range of the target current value is determined and the target current value is adjusted. For example, if the change range of the AC power is 1%, the target current value increases by 500*εA; if the change range of the AC power is -0.5%, the target current value decreases by 250*εA.

[0083] It is understood that in this embodiment, when the target electrolytic hydrogen production system is in the operation stage, the operating state of the target electrolytic hydrogen production system is adjusted according to the change of the AC power input to the target electrolytic hydrogen production system. First, the power increase or decrease is achieved by quickly adjusting the current, and then the system is stabilized by voltage approximation. This embodiment maximizes hydrogen production and efficiency by dynamically adjusting the operating state of the electrolyzer.

[0084] Please refer to Figure 5 , Figure 5 The present invention is a structural schematic diagram of a control device for an electrolytic hydrogen production system.

[0085] This embodiment provides a control device for an electrolytic hydrogen production system, comprising: The acquisition module 501 is used to acquire the AC power of the AC signal input to the target hydrogen production system by electrolysis in response to a control request.

[0086] The first calculation module 502 is used to update the AC-DC conversion efficiency between AC power and DC power in the target hydrogen production system when the target hydrogen production system is producing hydrogen by electrolysis.

[0087] The second calculation module 503 is used to determine the DC power of the target hydrogen production system when it produces hydrogen by electrolysis based on the AC power and the updated AC-DC conversion efficiency.

[0088] The third measurement module 504 is used to detect the stack in the target hydrogen production system during the process of hydrogen production by electrolysis in the target hydrogen production system, and determine the stack voltage according to the detected stack parameters.

[0089] The fourth calculation module 505 is used to determine the target current value required for the target electrolytic hydrogen production system to produce hydrogen by electrolysis based on the DC power and the stack voltage.

[0090] The selection module 506 is configured to determine a control mode based on the target current value.

[0091] The output module 507 is used to send the control instruction corresponding to the control mode to the target electrolytic hydrogen production system to control the target electrolytic hydrogen production system to perform electrolytic hydrogen production and produce the amount of hydrogen corresponding to the target current value.

[0092] It will be appreciated by those skilled in the art that all or some of the steps and devices in the methods disclosed above may be implemented as software, firmware, hardware, and appropriate combinations thereof. Some or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as an application-specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or non-transitory medium) and a communication medium (or transient medium). As known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and can be accessed by a computer. It is well known to those skilled in the art that communication media generally contain computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transmission mechanism, and may include any information delivery media. It can be understood that the contents of the above method embodiments are all applicable to the present device embodiments, the functions specifically implemented by the present device embodiments are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0093] An embodiment of the present application also provides an electronic device, which includes a memory and a processor. The memory stores a computer program, and when the processor executes the computer program, any of the above methods for controlling a hydrogen production system by electrolysis is implemented.

[0094] refer to Figure 6 , Figure 6 The hardware structure of an electronic device of another embodiment is illustrated, and the electronic device includes: The processor 601 may be implemented by a general-purpose CPU (Central Processing Unit), a microprocessor, an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of the present application; The memory 602 can be implemented in the form of a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory 602 can store operating devices and other applications. When the technical solution provided in the embodiment of this specification is implemented by software or firmware, the relevant program code is stored in the memory 602, and the processor 601 is called to execute the electrolysis hydrogen production system control method of the embodiment of this application; Input / output interface 603, used to implement information input and output; Communication interface 604, used to realize communication interaction between the device and other devices, which can be realized through wired mode (such as USB, network cable, etc.) or wireless mode (such as mobile network, WIFI, Bluetooth, etc.); A bus 605 that transmits information between various components of the device (e.g., processor 601, memory 602, input / output interface 603, and communication interface 604); The processor 601 , the memory 602 , the input / output interface 603 and the communication interface 604 are connected to each other in communication within the device via a bus 605 .

[0095] It can be understood that the contents of the above method embodiments are all applicable to the electronic device embodiment, the functions specifically implemented by the electronic device embodiment are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0096] An embodiment of the present application also provides a computer-readable storage medium, which stores a program executable by a processor. When the program executable by the processor is executed by the processor, it is used to implement the control method of the hydrogen production system by electrolysis as described in any one of the above specific embodiments.

[0097] An embodiment of the present application also discloses a computer program product, including a computer program or computer instructions, wherein the computer program or computer instructions are stored in a computer-readable storage medium, a processor of a computer device reads the computer program or computer instructions from the computer-readable storage medium, and the processor executes the computer program or computer instructions, so that the computer device executes the method for controlling the hydrogen production system by electrolysis as described in any of the previous embodiments.

[0098] It can be understood that the contents of the above method embodiments are all applicable to the present storage medium embodiments, the functions specifically implemented by the present storage medium embodiments are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0099] The terms "first", "second", "third", "fourth", etc. (if any) in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0100] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0101] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0102] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0103] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, referred to as ROM), random access memory (Random Access Memory, referred to as RAM), disk or optical disk and other media that can store program codes.

[0104] Although the description of the present application has been quite detailed and specifically describes several described embodiments, it is not intended to be limited to any of these details or embodiments or any particular embodiment, but should be regarded as providing a broad possible interpretation of these claims by reference to the attached claims, taking into account the prior art, so as to effectively cover the intended scope of the present application. In addition, the above description of the present application is based on the embodiments foreseeable by the inventor, and its purpose is to provide a useful description, and those non-substantial changes to the present application that have not yet been foreseen may still represent equivalent changes to the present application.

Claims

1. A method for controlling a hydrogen production system by electrolysis, characterized in that: The method comprises: In response to a control request, acquiring an AC power of an AC signal input to a target hydrogen production system by electrolysis; When the target hydrogen production by electrolysis system produces hydrogen by electrolysis, updating the AC / DC conversion efficiency between AC power and DC power in the target hydrogen production by electrolysis system; Based on the AC power and the updated AC / DC conversion efficiency, determining the DC power of the target hydrogen production system when performing hydrogen production by electrolysis; During the process of the target hydrogen production by electrolysis system, detecting the stack in the target hydrogen production by electrolysis system, and determining the stack voltage according to the detected stack parameters; Determining a target current value required for the target hydrogen production system to produce hydrogen by electrolysis based on the DC power and the stack voltage; determining a control mode based on the target current value; The control instruction corresponding to the control mode is sent to the target electrolytic hydrogen production system to control the target electrolytic hydrogen production system to perform electrolytic hydrogen production and produce the amount of hydrogen corresponding to the target current value.

2. A method for controlling a hydrogen production system by electrolysis according to claim 1, characterized in that: The stack parameters include stack operating temperature, stack operating time, and ohmic voltage drop of an electrolytic cell in the stack; During the process of the target hydrogen production system producing hydrogen by electrolysis, detecting the stack in the target hydrogen production system, and determining the stack voltage according to the detected stack parameters, including: During the process of the target hydrogen production system producing hydrogen by electrolysis, detecting the stack in the target hydrogen production system by electrolysis to obtain the stack operating temperature, stack operating time and ohmic voltage drop; Based on the operating temperature of the battery stack, updating the battery stack attenuation coefficient of the battery stack; The stack voltage is determined based on the stack operating temperature, the stack operating time, the ohmic voltage drop, and the updated stack attenuation coefficient.

3. A method for controlling a hydrogen production system by electrolysis according to claim 2, characterized in that: The updating of the stack attenuation coefficient of the stack based on the stack operating temperature includes: When the battery stack is at the battery stack operating temperature, detecting the battery stack to obtain an actual voltage of the battery stack; Based on the functional relationship between the stack operating temperature, the stack voltage and the actual voltage of the stack, an updated stack attenuation coefficient is determined.

4. A method for controlling a hydrogen production system by electrolysis according to claim 2, characterized in that: The step of determining a target current value required for the target hydrogen production system to produce hydrogen by electrolysis based on the DC power and the stack voltage includes: Based on the AC / DC conversion efficiency and the stack attenuation coefficient, generating a data mapping relationship between the first data storage unit and the second data storage unit; When the target electrolytic hydrogen production system produces hydrogen by electrolysis, the AC power and the stack operating temperature value are stored in the first data storage unit; By using the data mapping relationship between the first data storage unit and the second data storage unit, a current measurement value is generated in the second data storage unit, and the current measurement value is used as the target current value.

5. The method for controlling a hydrogen production system by electrolysis according to claim 1, characterized in that: When the target electrolytic hydrogen production system produces hydrogen by electrolysis, updating the AC / DC conversion efficiency between AC power and DC power in the target electrolytic hydrogen production system includes: Acquire a rectifier of the target electrolytic hydrogen production system, and call AC / DC conversion efficiency curve data corresponding to the rectifier; Determining a DC power instruction corresponding to the AC power based on the AC-DC conversion efficiency curve data; Sending the DC power instruction to the target electrolytic hydrogen production system to control the DC current of the target electrolytic hydrogen production system during hydrogen production by electrolysis; Acquiring the actual direct current power of the target electrolytic hydrogen production system when controlling electrolytic hydrogen production, and determining the actual AC-DC conversion efficiency according to the actual direct current power; Based on the actual AC-DC conversion efficiency, the AC-DC conversion efficiency curve data is updated to determine an updated AC-DC conversion efficiency.

6. A method for controlling a hydrogen production system by electrolysis according to claim 1, characterized in that: The step of sending the control instruction corresponding to the control mode to the target electrolytic hydrogen production system to control the target electrolytic hydrogen production system to perform electrolytic hydrogen production and produce the amount of hydrogen corresponding to the target current value includes: When the control mode is the first mode, obtaining the actual voltage of the stack in the target electrolytic hydrogen production system during hydrogen production; Comparing the actual voltage with the stack voltage, and adjusting the target current value according to the comparison result until the difference between the actual voltage and the stack voltage is within a preset value range; According to the adjusted target current value, the target electrolysis hydrogen production system is controlled to produce an amount of hydrogen corresponding to the adjusted target current value.

7. A method for controlling a hydrogen production system by electrolysis according to claim 1, characterized in that: The step of sending the control instruction corresponding to the control mode to the target electrolytic hydrogen production system to control the target electrolytic hydrogen production system to perform electrolytic hydrogen production and produce the amount of hydrogen corresponding to the target current value includes: When the control mode is the second mode, monitoring the change of the AC power of the target hydrogen production system during the hydrogen production process by electrolysis to determine the change amplitude of the AC power; Based on the mapping relationship between the change amplitude of the AC power and the adjustment amplitude of the target current value, determining the adjustment amplitude of the target current value and adjusting the target current value; According to the adjusted target current value, the target electrolysis hydrogen production system is controlled to produce an amount of hydrogen corresponding to the adjusted target current value.

8. A control device for an electrolytic hydrogen production system, characterized in that: The device comprises: An acquisition module, configured to acquire, in response to a control request, an AC power of an AC signal input to a target electrolytic hydrogen production system; A first calculation module is used to update the AC-DC conversion efficiency between AC power and DC power in the target hydrogen production system when the target hydrogen production system is producing hydrogen by electrolysis; A second calculation module is used to determine the DC power of the target hydrogen production system when it performs hydrogen production by electrolysis based on the AC power and the updated AC-DC conversion efficiency; a third measuring module, configured to detect the stack of the target electrolytic hydrogen production system during the process of electrolytic hydrogen production by the target electrolytic hydrogen production system, and determine the stack voltage according to the detected stack parameters; A fourth calculation module is used to determine a target current value required for the target electrolytic hydrogen production system to produce hydrogen by electrolysis based on the DC power and the stack voltage; A selection module, configured to determine a control mode based on the target current value; The output module is used to send the control instruction corresponding to the control mode to the target electrolytic hydrogen production system to control the target electrolytic hydrogen production system to perform electrolytic hydrogen production and produce the amount of hydrogen corresponding to the target current value.

9. An electronic device, characterized in that: The electronic device includes a memory and a processor, the memory stores a computer program, and the processor implements the control method of the hydrogen production system by electrolysis as claimed in any one of claims 1 to 7 when executing the computer program.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the method for controlling a hydrogen production system by electrolysis according to any one of claims 1 to 7 is implemented.

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