Electric hydrogen production device frequency response control method considering electro-thermal flow coupling

Abstract

The invention discloses an electric hydrogen production device frequency response control method considering electro-thermal flow coupling, and belongs to the technical field of hydrogen production, the electric hydrogen production device frequency response control method comprises the following steps: constructing a system dynamic response model containing an electric hydrogen production device based on an electro-thermal flow coupling multi-physical process of dynamic response of the electric hydrogen production device; coupling dynamics of electrical, thermodynamic and hydrodynamic characteristics of an electrolytic cell are considered, the coupling dynamics are simplified and reconstructed to obtain a frequency response control model meeting operation constraints of an electric hydrogen production device, power regulation response is performed under a frequency control time scale, frequency modulation sensitivity and stability of electric hydrogen production can be remarkably improved, and the method is suitable for large-scale popularization and application. And safe and reliable operation of the power system under complex working conditions is ensured.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of hydrogen production, and more particularly relates to a frequency response control method for an electric hydrogen production device considering electric-thermal flow coupling. BACKGROUND

[0002] The increasing proportion of new energy power generation further complicates the dynamic characteristics of the power grid, and the randomness and uncertainty of source and load fluctuations are significantly enhanced, so that the traditional frequency regulation method cannot meet the stable control requirements of the power system. Under the trend of green hydrogen replacement, large-capacity electric hydrogen production devices have the ability to flexibly adjust in addition to hydrogen production, and are important potential frequency regulation resources. Electric hydrogen production technology is a clean energy conversion method that decomposes water into hydrogen and oxygen through electric energy. Its core principle is to use direct current to drive water molecules in the electrolytic cell to undergo an electrochemical reaction: hydrogen is generated at the cathode, and oxygen is released at the anode. This technology can be divided into alkaline electrolysis, proton exchange membrane electrolysis, and solid oxide electrolysis according to the type of electrolyte, and has the advantages of zero carbon emission and high-efficiency energy storage, and is a key supporting technology for renewable energy consumption and hydrogen energy economy.

[0003] The prior art often designs a control strategy based on a single physical characteristic in terms of frequency regulation, such as frequency deviation-current regulation control law for frequency regulation, which leads to inaccurate description of the dynamic response of the device and makes it difficult to achieve precise frequency regulation. At the same time, the neglect of internal characteristic regulation potential leads to increased system energy consumption, affects the stability of the electrolytic cell, and restricts the frequency response performance. In addition, the existing frequency response control model cannot accurately reflect the adjustment capacity of various auxiliary machines in the device under different frequency disturbances, affecting the system's collaborative frequency regulation effect.

[0004] In summary, the prior art has problems such as insufficient adjustment capacity and poor frequency control performance in the frequency response control process of the electric hydrogen production device, and a new solution is urgently needed. SUMMARY

[0005] In view of the above defects or improvement needs of the prior art, the present application provides a frequency response control method for an electric hydrogen production device considering electric-thermal flow coupling, which aims to solve the technical problems of insufficient adjustment capacity and poor frequency control performance in the frequency response control process of the electric hydrogen production device in the prior art.

[0006] To achieve the above-mentioned purpose, according to one aspect of the present application, a frequency response control method for an electric hydrogen production device considering electric-thermal flow coupling is provided, comprising: S1, based on the electric-thermal flow coupling multi-physical process of the dynamic response of the electric hydrogen production device, a system dynamic response model containing the electric hydrogen production device is constructed; the electric-thermal flow coupling multi-physical process includes the bubble dynamic process in the flow channel of the electrolytic cell and the thermodynamic process of the electrolytic cell; S2, linearizing the system dynamic response model containing the electric hydrogen production device to obtain a system linear state space model; S3, reconstruct the system linear state space model into a frequency response control model satisfying the operation constraints of the hydrogen production device, aiming at minimizing the system frequency deviation and the current regulation deviation; S4, solve the frequency response control model to obtain frequency control decision instructions during system frequency fluctuation; and execute the frequency control decision instructions to perform frequency response control of the hydrogen production device.

[0007] Further, the bubble dynamic process in the electrolyzer flow channel is:

[0008]

[0009] wherein, is the equivalent bubble coverage of the electrolyzer flow channel, is the electrolyzer current, is the two empirical parameters reflecting the relationship between the electrolyzer current and the equivalent bubble coverage of the flow channel, is the circulation flow rate of the electrolyte, is the circulating pump power, is the power conversion coefficient, is the density of the electrolyte, is the gravitational constant, represents the circulating pump head.

[0010] Further, the system dynamic response model containing the hydrogen production device is constructed, comprising:

[0011]

[0012]

[0013]

[0014] wherein, is a nonlinear function, is a state vector, is a control vector, is a disturbance vector, is the electrolyzer temperature, is the ambient temperature, is the equivalent bubble coverage of the electrolyzer flow channel, is the frequency response quantity of the thermal power unit, is the system frequency deviation, is the electrolyzer power, is the electrolyzer current, is the refrigeration power, is the circulating pump power, This represents the system power fluctuation.

[0015] Furthermore, S2 includes: utilizing the small-signal model formula The dynamic response model of the constructed electro-hydrogen production device is linearized to obtain the linear state-space model of the system; A, B, and E are coefficient matrices. For state vectors, For control vectors, This is the interference vector.

[0016] Furthermore, the coefficient matrices A, B, and E are respectively represented as

[0017]

[0018]

[0019] in, The heat dissipation coefficient of the electrolytic cell stack. For the heat capacity of the electrolytic raw materials, For the density of the electrolytic raw materials, To set the flow rate, For the heat capacity of the electrolytic cell, For the heat capacity of the heat exchanger, The heat dissipation coefficient of the electrolytic cell stack. An empirical parameter reflecting the relationship between electrolytic cell current and equivalent bubble coverage in the flow channel. The system load damping coefficient is... For system inertia, These are two empirical parameters reflecting the relationship between electrolytic cell current and equivalent bubble coverage in the flow channel. The frequency regulation time constant of the thermal power unit. This refers to the number of electrolysis chambers. Thermal neutral voltage, For the heat capacity of the heat exchanger, The power conversion factor, To set the fuel cell stack temperature, To set the heat exchanger temperature, To set the bubble coverage rate.

[0020] Furthermore, the objective of minimizing the system frequency deviation and current regulation deviation in S3 includes setting the objective function as follows:

[0021] in, Let be the objective function. This is the cost of controlling the deviation in the current regulation of the electrolytic cell in the system. This refers to the deviation between the electrolysis current and the set value. For system frequency deviation, The cost of controlling system frequency deviation, This represents the discrete sampling time interval.

[0022] Furthermore, the operational constraints of the electro-hydrogen production device include: constraints of the discretized system linear state-space model, constraints of the electrolyzer current, constraints of the equivalent bubble coverage of the electrolyzer flow channel, constraints of the electrolyzer power, constraints of the auxiliary equipment operation of the electro-hydrogen production device, and constraints of the temperature of the electro-hydrogen production device.

[0023] According to another aspect of the present invention, a frequency response control method for an electro-thermal fluid-generating device considering electro-thermal fluid coupling is provided, for executing the frequency response control method for an electro-thermal fluid-generating device considering electro-thermal fluid coupling, comprising: A construction module is used to build a system dynamic response model of an electrohydrogen production device based on the electrothermal-fluid coupled multi-physics process of the dynamic response of the electrohydrogen production device; the electrothermal-fluid coupled multi-physics process includes the bubble dynamic process in the flow channel of the electrolyzer and the thermodynamic process of the electrolyzer. A simplification module is used to linearize the system dynamic response model of the electro-hydrogen production device to obtain a linear state-space model of the system. The reconstruction module is used to reconstruct the linear state-space model of the system into a frequency response control model that satisfies the operating constraints of the electric hydrogen production device, with the goal of minimizing the system frequency deviation and current regulation deviation. The control module is used to solve the frequency response control model to obtain frequency control decision instructions during system frequency fluctuations; and to execute the frequency control decision instructions to perform frequency response control of the electro-hydrogen production device.

[0024] According to another aspect of the present invention, a frequency response control system for an electrohydrogen production device considering electrothermal-fluid coupling is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps of the method.

[0025] According to another aspect of the present invention, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the steps of the frequency response control method for the electro-hydrogen production device.

[0026] In summary, compared with the prior art, the above-described technical solutions conceived by this invention can achieve the following beneficial effects: (1) This invention provides a frequency response control method for an electrohydrogen production device that considers electrothermal-fluid coupling. Based on the electrothermal-fluid coupling multi-physical process of the dynamic response of the electrohydrogen production device, a system dynamic response model of the electrohydrogen production device is constructed. It takes into account the coupled dynamics of the electrical, thermodynamic and fluid dynamic characteristics of the electrolyzer, and simplifies and reconstructs it to obtain a frequency response control model that meets the operating constraints of the electrohydrogen production device. The power regulation response is performed under frequency and time, which can significantly improve the frequency regulation sensitivity and stability of the electrohydrogen production device and ensure the safe and reliable operation of the power system under complex operating conditions.

[0027] (2) The dynamic process of bubbles in the electrolytic cell flow channel in this scheme is represented as follows: and This design takes into account the impact of the bubble effect on the dynamic response process of the electrolyzer, enabling accurate control of the dynamic characteristics of the electrolyzer.

[0028] (3) The formula used in this scheme The dynamic response model of the constructed electro-hydrogen production device is linearized. This design takes into account that the dynamic response model of the electro-hydrogen production device system is relatively complex and difficult to be directly incorporated into real-time calculation. The linearized model can be calculated quickly and directly applied to frequency control.

[0029] (4) In this scheme, the objective function is set as: This design takes into account the impact of current deviation on hydrogen production rate and frequency deviation on grid security, and can achieve a balance between the hydrogen production load and the system frequency support capability.

[0030] (5) The operating constraints of the electro-hydrogen production device described in this scheme include: linear state space model constraints of the discretized system, current constraints of the electrolyzer, equivalent bubble coverage constraints of the electrolyzer flow channel, power constraints of the electrolyzer, operating constraints of the auxiliary equipment of the electro-hydrogen production device, and temperature constraints of the electro-hydrogen production device. This design takes into account the physical constraints of the actual operation of the electro-hydrogen production device during the actual response process, and can ensure the safety of the electro-hydrogen production device in the frequency modulation process. Attached Figure Description

[0031] Fig. 1 This is a flowchart of the frequency response control method for an electro-hydrogen production device considering electrothermal-current coupling provided in Embodiment 1 of the present invention; Fig. 2 This is a control system block diagram of the frequency response control method for an electro-hydrogen production device considering electrothermal-fluid coupling provided in Embodiment 1 of the present invention. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0033] Example 1 This embodiment provides a frequency response control method for an electro-hydrogen production device considering electrothermal-current coupling. (See reference...) Figs. 1-2 This document provides a detailed explanation of the frequency response control method for the electro-thermal-current coupling device in this embodiment. (See also...) Fig. 1 The method includes operations S1-S4.

[0034] In this embodiment, to ensure the accuracy of dynamic response modeling of the electro-hydrogen production system, it is necessary to collect and determine equipment parameters and operating characteristic parameters in advance, specifically including: power conversion coefficient. Empirical parameters of the relationship between electrolytic cell current and equivalent bubble coverage in the flow channel Electrolysis chamber number Electrolytic cell heat dissipation coefficient Ambient temperature Electrolytic raw material heat capacity Heat capacity of heat exchanger Electrolytic cell heat dissipation coefficient Reversible voltage under standard conditions Temperature correction factor for reversible voltage ideal gas constant The transfer coefficient of the polarization voltage of the electrolytic cell Faraday constant Equivalent exchange current density of electrolytic cell electrodes Electrolytic cell resistivity Electrolytic cell electrode plate reaction area wait.

[0035] Operation S1: Based on the electrothermal-fluid coupled multi-physical process of the dynamic response of the electro-hydrogen production device, a system dynamic response model of the electro-hydrogen production device is constructed; the electrothermal-fluid coupled multi-physical process includes the dynamic process of bubbles in the flow channel of the electrolyzer and the thermodynamic process of the electrolyzer.

[0036] Specifically, the electrothermal-fluid coupled multi-physics processes of the dynamic response of an electrohydrogen production device include: Dynamic process of bubbles in the flow channel of an electrolytic cell:

[0037]

[0038] in, This refers to the equivalent bubble coverage of the electrolytic cell flow channel. This refers to the current in the electrolytic cell. These are two empirical parameters reflecting the relationship between electrolytic cell current and equivalent bubble coverage in the flow channel. The circulating flow rate of the electrolytic raw materials. For the power of the circulating pump, The power conversion factor, For the density of the electrolytic raw materials, It is the gravitational constant. This indicates the head of the circulating pump.

[0039] Thermodynamic processes of an electrolytic cell:

[0040]

[0041] in, For the heat capacity of the electrolytic cell, The temperature of the electrolytic cell. This refers to the number of electrolysis chambers. Thermal neutral voltage, The heat dissipation coefficient of the electrolytic cell stack. For ambient temperature, For the heat capacity of the electrolytic raw materials, For heat exchanger temperature, For the heat capacity of the heat exchanger, The heat dissipation coefficient of the electrolytic cell stack. This refers to the cooling capacity.

[0042] The power formula for an electrolytic cell is:

[0043]

[0044] in, The reversible voltage under standard conditions. This is the temperature correction factor for the reversible voltage. Let be the ideal gas constant. The transfer coefficient of the polarization voltage of the electrolytic cell. It is Faraday's constant. This refers to the current in the electrolytic cell. This represents the equivalent exchange current density of the electrolytic cell electrodes. The resistivity of the electrolytic cell. This represents the reaction area of ​​the electrode plates in the electrolytic cell.

[0045] The system dynamic response process of an electro-hydrogen production unit is as follows:

[0046]

[0047]

[0048] in, For system inertia, For system frequency deviation, This refers to the system power fluctuation. This refers to the frequency response of the thermal power unit. This refers to the frequency response of an electro-hydrogen production device. This refers to the frequency response of the electrolytic cell. This refers to the frequency response of the auxiliary cooling unit. This is the frequency response of the circulating pump. The system load damping coefficient is... The frequency regulation time constant of the thermal power unit. This is the power frequency characteristic coefficient of the thermal power unit.

[0049] The state-space expression of the system's dynamic response can then be represented as:

[0050]

[0051]

[0052]

[0053] in, It is a nonlinear function. For state vectors, For control vectors, For the interference vector, This is the interference vector.

[0054] Operation S2 linearizes the system dynamic response model of the electro-hydrogen production device to obtain a linear state-space model. Further, based on small-signal modeling at a set operating point, the system dynamic response model of the electro-hydrogen production device is linearized into a linear state-space model.

[0055] In this embodiment, to achieve small signal modeling based on a set operating point, it is necessary to collect and determine the set operating point information in advance, including: setting the flow rate. Set the fuel cell stack temperature Set the heat exchanger temperature Set bubble coverage and setting the electrolytic cell current .

[0056] Specifically, the linear state-space model based on the small signal modeling at the set operating point is as follows:

[0057]

[0058]

[0059]

[0060]

[0061]

[0062]

[0063] in, To set the flow rate, To set the fuel cell stack temperature, To set the heat exchanger temperature, To set the bubble coverage rate.

[0064] Operation S3 aims to minimize the system frequency deviation and current regulation deviation, and reconstructs the linear state-space model of the system into a frequency response control model that satisfies the operating constraints of the electro-hydrogen production device.

[0065] Specifically, the optimization objective of the frequency response control model is:

[0066] in, Let be the objective function. This is the cost of controlling the deviation in the current regulation of the electrolytic cell in the system. The cost of controlling system frequency deviation, This represents the discrete sampling time interval.

[0067] The operational constraints of the electro-hydrogen production unit and system equipment include: constraints of the discretized system linear state-space model, constraints of the electrolyzer current, constraints of the equivalent bubble coverage of the electrolyzer flow channel, constraints of the electrolyzer power, constraints of the auxiliary equipment operation of the electro-hydrogen production unit, and constraints of the temperature of the electro-hydrogen production unit.

[0068] The constraints of the linear state-space model of the discretized system are:

[0069] in, It is an identity matrix.

[0070] The current constraint of the electrolytic cell is:

[0071] in, , These are the upper and lower limits of the electrolytic cell current, respectively.

[0072] The equivalent bubble coverage constraint for the electrolytic cell flow channel is:

[0073] in, , These represent the upper and lower limits of the equivalent bubble coverage rate of the electrolytic cell flow channel, respectively.

[0074] The power constraint of the electrolytic cell is:

[0075]

[0076] in, , These are the upper and lower limits of the electrolytic cell power, respectively.

[0077] The auxiliary cooling power constraint of the electric hydrogen production unit is:

[0078] in, , These are the upper and lower limits of cooling capacity, respectively.

[0079] The power constraint of the auxiliary circulating pump in the electric hydrogen production unit is:

[0080] in, , These represent the upper and lower limits of the circulating pump power, respectively.

[0081] The temperature constraints for the fuel cell stack and heat exchanger in the electric hydrogen production unit are as follows:

[0082]

[0083] in, , These are the upper and lower limits of temperature, respectively.

[0084] Operation S4: Solve the frequency response control model during system frequency fluctuations to obtain frequency control decision instructions; execute the frequency control decision instructions to perform frequency response control of the electro-hydrogen production device.

[0085] By solving the frequency response control model for electro-hydrogen production online, executable frequency control decisions are obtained. In this embodiment, online decision-making is performed based on power system load fluctuation information, enabling the decision scheme to achieve a balance between frequency regulation performance and hydrogen production economics.

[0086] To further illustrate the frequency response control method for an electro-thermal-current coupled hydrogen production device provided in this embodiment, Fig. 2 The system shown is used as an example to illustrate the control flow of this method. Under the influence of external load fluctuations and system frequency input, it works in conjunction with external conventional units to achieve system frequency support. The real-time running model predictive controller solves the frequency control optimization model and outputs control decision quantities for execution.

[0087] Example 2 This embodiment provides a frequency response control method for an electro-thermal-current coupled hydrogen production device, used to execute the frequency response control method for an electro-thermal-current coupled hydrogen production device of Embodiment 1, including: A construction module is used to build a system dynamic response model of an electrohydrogen production device based on the electrothermal-fluid coupled multi-physics process of the dynamic response of the electrohydrogen production device; the electrothermal-fluid coupled multi-physics process includes the bubble dynamic process in the flow channel of the electrolyzer and the thermodynamic process of the electrolyzer. A simplification module is used to linearize the system dynamic response model of the electro-hydrogen production device to obtain a linear state-space model of the system. The reconstruction module is used to reconstruct the linear state-space model of the system into a frequency response control model that satisfies the operating constraints of the electric hydrogen production device, with the goal of minimizing the system frequency deviation and current regulation deviation. The control module is used to solve the frequency response control model to obtain frequency control decision instructions during system frequency fluctuations; and to execute the frequency control decision instructions to perform frequency response control of the electro-hydrogen production device.

[0088] Example 3 The present invention also relates to an electronic device, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps of the above-described method.

[0089] The electronic device can be a desktop computer, laptop, handheld computer, or cloud server, etc. The processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The memory can be used to store computer programs and / or modules. The processor implements various functions of the electronic device by running or executing the computer programs and / or modules stored in the memory, and by accessing data stored in the memory.

[0090] Example 4 The present invention also relates to a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the above-described method.

[0091] Specifically, the memory may include high-speed random access memory, as well as non-volatile memory, such as hard disks, RAM, plug-in hard disks, smart media cards (SMC), secure digital (SD) cards, flash cards, at least one disk storage device, flash memory device, or other volatile solid-state storage devices.

[0092] Example 5 This invention provides a computer program product or computer program that includes computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the steps of the method described in the above embodiments of this invention.

[0093] The technical features of the embodiments described above can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification. It should be noted that the terms "in one embodiment," "for example," and "again" in this invention are intended to illustrate the invention and are not intended to limit the invention.

[0094] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A frequency response control method for an electrohydrogen production device considering electrothermal-fluid coupling, characterized in that, include: S1. Based on the electrothermal-fluid coupled multi-physics process of dynamic response of electric hydrogen production device, a system dynamic response model of electric hydrogen production device is constructed. The electrothermal-fluid coupled multi-physics process includes the dynamic process of bubbles in the electrolytic cell channel and the thermodynamic process of the electrolytic cell. S2, Linearize the system dynamic response model of the electro-hydrogen production device to obtain the system linear state-space model; S3, with the goal of minimizing the system frequency deviation and current regulation deviation, the linear state-space model of the system is reconstructed into a frequency response control model that satisfies the operating constraints of the electric hydrogen production device; S4, during the system frequency fluctuation process, solve the frequency response control model to obtain the frequency control decision command; execute the frequency control decision command to perform frequency response control of the electro-hydrogen production device.

2. The frequency response control method for an electrohydrogen production device considering electrothermal-current coupling as described in claim 1, characterized in that, Dynamic process of bubbles in the flow channel of the electrolytic cell: in, This refers to the equivalent bubble coverage of the electrolytic cell flow channel. This refers to the current in the electrolytic cell. These are two empirical parameters reflecting the relationship between electrolytic cell current and equivalent bubble coverage in the flow channel. The circulating flow rate of the electrolytic raw materials. For the power of the circulating pump, The power conversion factor, For the density of the electrolytic raw materials, It is the gravitational constant. This indicates the head of the circulating pump.

3. The frequency response control method for an electrohydrogen production device considering electrothermal-current coupling as described in claim 2, characterized in that, The system dynamic response model for constructing an electro-hydrogen production device includes: in, It is a nonlinear function. For state vectors, For control vectors, For interference vectors, The temperature of the electrolytic cell. For ambient temperature, This refers to the equivalent bubble coverage of the electrolytic cell flow channel. This refers to the frequency response of the thermal power unit. For system frequency deviation, For the power of the electrolytic cell, This refers to the current in the electrolytic cell. For cooling capacity, For the power of the circulating pump, This represents the system power fluctuation.

4. The frequency response control method for an electrohydrogen production device considering electrothermal-current coupling as described in claim 1, characterized in that, S2 includes: utilizing the small-signal model formula The dynamic response model of the constructed electro-hydrogen production device is linearized to obtain the linear state-space model of the system; A, B, and E are coefficient matrices. For state vectors, For control vectors, This is the interference vector.

5. The frequency response control method for an electrohydrogen production device considering electrothermal-current coupling as described in claim 4, characterized in that, The coefficient matrices A, B, and E are respectively represented as... in, The heat dissipation coefficient of the electrolytic cell stack. For the heat capacity of the electrolytic raw materials, For the density of the electrolytic raw materials, To set the flow rate, For the heat capacity of the electrolytic cell, For the heat capacity of the heat exchanger, The heat dissipation coefficient of the electrolytic cell stack. An empirical parameter reflecting the relationship between electrolytic cell current and equivalent bubble coverage in the flow channel. The system load damping coefficient is... For system inertia, These are two empirical parameters reflecting the relationship between electrolytic cell current and equivalent bubble coverage in the flow channel. The frequency regulation time constant of the thermal power unit. This refers to the number of electrolysis chambers. Thermal neutral voltage, For the heat capacity of the heat exchanger, The power conversion factor, To set the fuel cell stack temperature, To set the heat exchanger temperature, To set the bubble coverage rate.

6. The frequency response control method for an electrohydrogen production device considering electrothermal-current coupling as described in claim 1, characterized in that, The objective in S3, which aims to minimize system frequency deviation and current regulation deviation, includes setting the objective function as follows: in, Let be the objective function. This is the cost of controlling the deviation in the current regulation of the electrolytic cell in the system. This refers to the deviation between the electrolysis current and the set value. For system frequency deviation, The cost of controlling system frequency deviation, This represents the discrete sampling time interval.

7. The frequency response control method for an electrohydrogen production device considering electrothermal-current coupling as described in claim 6, characterized in that, The operational constraints of the electro-hydrogen production unit include: constraints of the discretized system linear state-space model, constraints of the electrolyzer current, constraints of the equivalent bubble coverage of the electrolyzer flow channel, constraints of the electrolyzer power, constraints of the auxiliary equipment operation of the electro-hydrogen production unit, and constraints of the temperature of the electro-hydrogen production unit.

8. A frequency response control method for an electrohydrogen production device considering electrothermal-current coupling, characterized in that, The frequency response control method for an electrothermal hydrogen production device considering electrothermal-current coupling as described in any one of claims 1-7 includes: A construction module is used to build a system dynamic response model of an electrohydrogen production device based on the electrothermal-fluid coupled multi-physics process of the dynamic response of the electrohydrogen production device; the electrothermal-fluid coupled multi-physics process includes the bubble dynamic process in the flow channel of the electrolyzer and the thermodynamic process of the electrolyzer. A simplification module is used to linearize the system dynamic response model of the electro-hydrogen production device to obtain a linear state-space model of the system. The reconstruction module is used to reconstruct the linear state-space model of the system into a frequency response control model that satisfies the operating constraints of the electric hydrogen production unit, with the goal of minimizing the system frequency deviation and current regulation deviation. The control module is used to solve the frequency response control model to obtain frequency control decision instructions during system frequency fluctuations; and to execute the frequency control decision instructions to perform frequency response control of the electro-hydrogen production device.

9. A frequency response control system for an electrohydrogen production device considering electrothermal-current coupling, comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 7.

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