CN118028846B - Off-grid carbon neutralization fuel synthesis system and regulation and control method and device thereof - Google Patents

Abstract

The present invention provides an off-grid carbon-neutral fuel synthesis system and a control method and device thereof, which relates to the field of carbon neutrality technology. The system includes: a carbon capture device for collecting carbon dioxide in the environment; a gas storage tank connected to the carbon capture device for storing carbon dioxide; an electrolyzer connected to the gas storage tank for electrolyzing carbon dioxide to obtain an electrolysis product; an energy storage device for supplying energy to the carbon capture device and the electrolyzer; and a photovoltaic device for generating electricity to supply energy to the carbon capture device, the electrolyzer, and the energy storage device. The present invention can achieve carbon capture and conversion driven by green energy.

Description

Off-grid carbon neutral fuel synthesis system and control method and device thereof

Technical Field

The present invention relates to the field of carbon neutrality technology, and in particular to an off-grid carbon neutral fuel synthesis system and a control method and device thereof.

Background Art

Using carbon dioxide captured from ambient air to electrolyze hydrocarbon fuels can close its carbon cycle and is an important way to achieve sustainable energy. Currently, research on carbon _dioxide capture, utilization, and storage (CCUS) technology mainly focuses on carbon dioxide capture, seeking the best method to improve the efficiency of carbon dioxide capture and reduce its cost.

Green energy can further reduce carbon emissions and improve environmental protection, but there is no technical solution in the existing technology to combine green energy with carbon capture-conversion.

Summary of the invention

The present invention provides an off-grid carbon-neutral fuel synthesis system and a control method and device thereof, so as to solve the defect of the prior art that there is no technical solution combining green energy with carbon capture-conversion, and realize carbon capture-conversion using green energy.

The present invention provides an off-grid carbon neutral fuel synthesis system, comprising:

A carbon capture device, wherein the carbon capture device is used to collect carbon dioxide in the environment;

A gas storage tank, the gas storage tank is connected to the carbon capture device and is used to store carbon dioxide;

An electrolytic cell, the electrolytic cell being connected to the gas storage tank and being used to electrolyze carbon dioxide to obtain an electrolysis product;

An energy storage device, the energy storage device is used to supply energy to the carbon capture device and the electrolyzer;

A photovoltaic device is used to generate electrical energy to supply energy to the carbon capture device, the electrolyzer and the energy storage device.

The off-grid carbon-neutral fuel synthesis system provided according to the present invention also includes a box, the photovoltaic device is arranged on the outer top of the box, and the carbon capture device, the gas storage tank, the electrolyzer and the energy storage device are arranged inside the box.

The present invention also provides a control method based on any of the above-mentioned off-grid carbon-neutral fuel synthesis systems, comprising:

Obtaining performance parameters of the carbon capture device, the gas storage tank, the electrolyzer, the energy storage device, the photovoltaic device, and the solar shortwave irradiance during the regulation period;

Based on the performance parameters and the solar shortwave irradiance, the target optimization function is solved to obtain the control strategy of the system during the regulation period. The control strategy during the regulation period includes the operating parameters of each device in the system during the regulation period, wherein the optimization goal of the target optimization function is to maximize the output of the electrolysis product.

According to a control method provided by the present invention, the target optimization function is solved based on the performance parameter and the solar shortwave irradiance to obtain the control strategy of the system in the control period, including:

Based on the performance parameters and the solar shortwave irradiance, under preset constraints, solving the target optimization function to obtain a control strategy for the system within the regulation period;

The constraint conditions include association constraints of devices in the system and operation constraints of devices in the system;

The associated constraints of the devices in the system are used to constrain the flow of carbon dioxide between the carbon capture device, the gas storage tank and the electrolyzer, and to constrain the electrical energy of the system to come from the energy storage device and the photovoltaic device;

The operation constraints of the devices in the system are used to constrain the operation status of each device in the system.

According to a control method provided by the present invention, there are multiple control time periods; the operating constraints of the devices in the system include a first constraint condition, and the first constraint condition is used to constrain that at the end of the control time period, the total change in energy in the energy storage device and the total change in the amount of carbon dioxide in the gas storage tank are both 0.

According to a control method provided by the present invention, the operation constraint of the device in the system includes a second constraint condition, and the second constraint condition is used to constrain the operation state of the carbon capture device and the electrolyzer;

The second constraint is:

Wherein, B(t _i ) represents the value of parameter B in the i-th granularity period, nh is the control period, Indicates the amount of gas inlet material in the gas tank, represents the amount of carbon dioxide captured by the carbon capture device, u _cc and u _elec are 0, 1 variables, representing the switching status of the carbon capture device and the electrolyzer, P _cc represents the power of the carbon capture device, a _cc represents the carbon capture conversion coefficient of the carbon capture device, P _elec represents the power of the electrolyzer, a _elec represents the electrolysis amount conversion coefficient of the electrolyzer, and a _was represents the loss coefficient of the electrolyzer in processing carbon dioxide.

According to a control method provided by the present invention, the operation constraints of the devices in the system include a third constraint condition, and the third constraint condition is used to constrain the maximum number of continuous operation particle size time periods of the carbon capture device and the electrolyzer within the control period; the third constraint is:

in, and They respectively represent the number of maximum continuous operating particle size periods of the carbon capture device and the electrolyzer within the regulation time range.

The present invention also provides a control device based on any of the above-mentioned off-grid carbon-neutral fuel synthesis systems, comprising:

A parameter acquisition module, used to acquire performance parameters of the carbon capture device, the gas storage tank, the electrolyzer, the energy storage device, the photovoltaic device, and the solar shortwave irradiance during a control period;

A control module is used to solve the target optimization function based on the performance parameters and the solar shortwave irradiance to obtain the control strategy of the system during the control period. The control strategy during the control period includes the operating parameters of each device in the system during the control period, wherein the optimization goal of the target optimization function is to maximize the output of the electrolysis product.

The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements any of the control methods described above when executing the computer program.

The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the control method described in any one of the above is implemented.

The present invention provides an off-grid carbon-neutral fuel synthesis system and a control method and device thereof. The system includes a carbon capture device, a gas tank, an electrolyzer, an energy storage device, and a photovoltaic device. The photovoltaic device supplies energy to the carbon capture device, the gas tank, and the electrolyzer to capture and electrolyze carbon dioxide to obtain an electrolysis product, thereby realizing the synthesis of carbon-neutral fuel. In addition, considering that the output of the photovoltaic device fluctuates greatly within a day, an energy storage device is also provided in the system to cooperate with the photovoltaic device to jointly supply energy, thereby realizing green energy-driven carbon capture and conversion. Furthermore, the present invention also provides a method for controlling the system, which can realize the control of the system and maximize the amount of fuel synthesis.

BRIEF DESCRIPTION OF THE DRAWINGS

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

FIG1 is a schematic diagram of an off-grid carbon-neutral fuel synthesis system provided by the present invention;

FIG2 is a schematic flow diagram of a control method for an off-grid carbon-neutral fuel synthesis system provided by the present invention;

3 is a schematic diagram of the switch state of the carbon capture device in the verification experiment of the control method of the off-grid carbon-neutral fuel synthesis system provided by the present invention;

4 is a schematic diagram of the switch state of the electrolyzer in the verification experiment of the control method of the off-grid carbon-neutral fuel synthesis system provided by the present invention;

FIG5 is a graph showing the operating power variation of a carbon capture device in a verification experiment of a control method for an off-grid carbon-neutral fuel synthesis system provided by the present invention;

6 is a graph showing changes in electrolyzer operating power in a verification experiment of a control method for an off-grid carbon-neutral fuel synthesis system provided by the present invention;

7 is a diagram showing changes in energy storage in a verification experiment of a control method for an off-grid carbon-neutral fuel synthesis system provided by the present invention;

8 is a diagram showing the state change of energy storage power in a verification experiment of the control method of the off-grid carbon-neutral fuel synthesis system provided by the present invention;

FIG9 is a diagram showing changes in gas pressure in a gas storage tank in a verification experiment of a control method for an off-grid carbon-neutral fuel synthesis system provided by the present invention;

FIG10 is a diagram showing the carbon monoxide output in a verification experiment of the control method of the off-grid carbon-neutral fuel synthesis system provided by the present invention;

FIG11 is a diagram showing hydrogen production in a verification experiment of a control method for an off-grid carbon-neutral fuel synthesis system provided by the present invention;

FIG12 is a schematic diagram of a control device for an off-grid carbon-neutral fuel synthesis system provided by the invention;

FIG13 is a schematic structural diagram of an electronic device provided by the invention.

DETAILED DESCRIPTION

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

The off-grid carbon-neutral fuel synthesis system provided by the present invention is described below in conjunction with Figure 1. As shown in Figure 1, the system includes: a carbon capture device 10, a gas tank 20, an electrolyzer 30, an energy storage device 40, and a photovoltaic device 50. The carbon capture device 10 is connected to the gas tank 20, and the carbon capture device is used to collect carbon dioxide in the environment and transmit it to the gas tank 20 for storage. The electrolyzer 30 is connected to the gas tank 20, and the gas tank 20 transports carbon dioxide to the electrolyzer 30 for electrolysis to obtain an electrolysis product, which is a carbon-neutral fuel (carbon monoxide, hydrogen). The energy storage device 40 and the photovoltaic device 50 jointly supply power to the carbon capture device 10, the gas tank 20, and the electrolyzer 30. The photovoltaic device 50 can generate photoelectricity, but because the photovoltaic output is volatile, therefore, in the system provided by the present invention, the energy storage device 40 is flexibly adjusted to flexibly compensate for the instability of the energy supply of the photovoltaic device 50, thereby ensuring the operation of other devices in the system.

Furthermore, the system may also include a box, which may be a container box. The photovoltaic device 50 is arranged on the outer top of the box to receive solar energy and realize photovoltaic power generation, and other devices in the system may be arranged inside the box.

When the off-grid carbon-neutral fuel synthesis system provided by the present invention is in operation, the carbon dioxide in the ambient air is captured by the carbon capture device 10, and then the photovoltaic device 50 and the energy storage device 40 are used to cooperate with each other to smoothly reduce it to downstream products. This is a new, efficient, low-energy photovoltaic-driven carbon-neutral fuel synthesis method. The system can be completely off-grid during operation, that is, it does not need to be connected to the traditional power grid, but can be independently operated through parallel processing of photovoltaic power generation and energy storage.

Based on the above-mentioned off-grid carbon-neutral fuel synthesis system, the present invention also provides a control method for the system, which selects the operation strategy of the off-grid carbon-neutral fuel synthesis system by optimizing the control method, so that each device in the system can operate based on the operation strategy to achieve system optimization control. As shown in Figure 2, the method includes the steps of:

S210, obtaining the performance parameters of the carbon capture device, gas storage tank, electrolyzer, energy storage device, photovoltaic device, and the solar shortwave irradiance during the control period;

S220. Based on the performance parameters and solar shortwave irradiance, solve the target optimization function to obtain the control strategy of the system during the regulation period. The control strategy during the regulation period includes the operating parameters of each device in the system during the regulation period. The optimization goal of the target optimization function is to maximize the output of electrolytic products.

The performance parameters of the carbon capture device, gas storage tank, electrolyzer, energy storage device and photovoltaic device reflect their respective performances, such as the volume of the gas storage tank, the installed area of the photovoltaic device, the conversion coefficient of the electrolysis amount of the electrolyzer, the conversion coefficient of the carbon capture device, etc. Based on the performance parameters of the photovoltaic device and the solar short-wave irradiance during the regulation period, the output power of the photovoltaic device during the regulation period can be obtained. The solar short-wave irradiance during the regulation period can be the average solar short-wave irradiance at the location of the photovoltaic device, or it can be estimated based on the sunshine duration and sunshine intensity of the weather forecast.

The output power of the photovoltaic device can be determined by the following formula:

Where P _pv is the output power of the photovoltaic device, _HA is the solar shortwave irradiance, P _AZ is the installed capacity of the photovoltaic device, K is the efficiency of the photovoltaic device, is the photovoltaic power density, S is the installed area of the photovoltaic device, and _Ea represents the irradiance under standard conditions.

Before solving the target optimization function, it is also necessary to calculate the pressure in the gas tank The specific calculation can be done using the following formula:

in, represents the amount of carbon dioxide in the gas tank, R is the gas molar constant, T is the temperature, is the volume of the gas tank. The amount parameters of the gas substance are obtained from the gas volume and the ideal gas state equation.

The gas pressure p ^atmos of carbon dioxide captured by the carbon capture device satisfies the following formula:

In the formula Represents the volume of gas inlet and outlet of the gas storage tank, Represents the amount of gas entering and exiting the gas tank.

In the method provided by the present invention, the maximum output of the electrolysis product is used as the optimization target of the target optimization function, which can achieve the maximum output of carbon-neutral fuel. The target optimization function can be expressed as:

Where B(t _i ) represents the value of parameter B in the i-th particle size period, nh is the control period, and n _co represents the amount of carbon monoxide output. represents the carbon monoxide conversion coefficient, n _H2 represents the amount of hydrogen produced, Represents the hydrogen conversion coefficient. The purpose of setting the objective function is to ensure that the maximum output of product carbon monoxide/hydrogen is obtained within the control time range, thereby maximizing the profit.

The result obtained by solving the target optimization function should be able to meet the actual operating conditions. In the method provided by the present invention, in order to ensure the feasibility of the control strategy obtained by solving the target optimization function, constraints are set. When solving the target optimization function, each constraint needs to be satisfied. That is, based on the performance parameters and solar shortwave irradiance, under the preset constraints, the target optimization function is solved to obtain the control strategy of the system during the regulation period.

Specifically, the constraint conditions include association constraints of devices in the system and operation constraints of devices in the system.

The association constraints are used to constrain the flow of carbon dioxide between the carbon capture device, the gas storage tank and the electrolyzer, and to constrain the system's electrical energy to come from the energy storage device and the photovoltaic device. The association constraints of the carbon capture device, the gas storage tank and the electrolyzer can be expressed as:

Represents the amount of carbon dioxide captured by the carbon capture device, Represents the amount of gas entering the gas tank. Represents the amount of gas discharged from the gas tank. Represents the amount of carbon dioxide electrolyzed by the electrolyzer. This two-equation constraint stipulates that the carbon capture device captures carbon dioxide into the gas storage tank, and the gas out of the gas storage tank enters the electrolyzer.

Represents the amount of new gas storage material in the gas tank during each granularity period. Represents the maximum air intake and outlet speed of the gas tank. This constraint stipulates the real-time gas storage capacity of the gas tank.

The associated constraints between the energy storage device and the photovoltaic device can be expressed as:

P _exp (t _i )=P _pv (t _i )+P _ess (t _i )i∈nh;

Among them, P _exp represents the output power of the energy storage device and the photovoltaic device, and P _ess represents the working power of the energy storage device. This constraint specifies the power supply part of the system.

When the system is running, there are multiple control periods. In order to ensure the long-term stable operation of the system, at the end of each control period, there must be enough electric energy in the energy storage device to ensure the photovoltaic output fluctuations in the next control period, and there must be enough other energy in the gas tank to ensure the carbon dioxide treatment in the next control period. Since the goal of the objective optimization function is to maximize the output of electrolysis products, if the energy of the energy storage device and the amount of gas in the gas tank are not constrained, the final solution result will make the amount of gas in the energy storage device and the gas tank as small as possible, or even reach 0 after the end of the control period, which cannot support the operation of the next control period. In order to ensure the long-term stable operation of the system, in the method provided by the present invention, the operation constraints of the devices in the system include a first constraint condition, and the first constraint condition is used to constrain the total change in energy in the energy storage device and the total change in the amount of carbon dioxide in the gas tank to be 0 at the end of the control period. The first constraint can be expressed by the formula:

_Eess ( _tnh )＝ _Eess0

Among them, E _ess represents the energy storage, and E _ess0 represents the initial value of the energy storage at the beginning of the regulation period. The above two formulas constrain that within the regulation period, the total change in energy in the energy storage is 0, and the total change in the amount of carbon dioxide in the gas tank is 0.

Furthermore, the operation constraints of the devices in the system also include a second constraint condition, which is used to constrain the operation state of the carbon capture device and the electrolyzer. The second constraint condition is:

u _cc and u _elec are 0, 1 variables, representing the switch status of the carbon capture device and the electrolyzer, P _cc represents the power of the carbon capture device, a _cc represents the carbon capture conversion coefficient of the carbon capture device, P _elec represents the power of the electrolyzer, a _elec represents the electrolysis conversion coefficient of the electrolyzer, and a _was represents the loss coefficient of the electrolyzer for processing carbon dioxide. The second constraint stipulates the amount of carbon dioxide captured by the carbon capture device and the amount of carbon dioxide electrolyzed by the electrolyzer, and the constraint stipulates the loss return of electrolyzed carbon dioxide, which is more in line with the actual operation of the system.

The operating constraints of the devices in the system also include a third constraint condition, which is used to constrain the maximum number of continuous operation particle size periods of the carbon capture device and the electrolyzer within the control period. The third constraint is expressed by the formula:

in, and They represent the number of maximum continuous operating particle size periods of the carbon capture device and the electrolyzer within the control time range respectively.

Considering that continuous operation of the carbon capture device and the electrolyzer for too long may lead to overload, in the method provided by the present invention, the third constraint condition can be used to constrain the maximum continuous operation time of the carbon capture device and the electrolyzer within the control period to be within a range, thereby preventing losses caused by long-term continuous operation of the device. At the same time, the maximum continuous shutdown time within the control period is constrained to be within the specified number of granularity time periods, thereby preventing additional losses caused by restarting the device after being shut down for a long time.

Furthermore, the operation constraints of the devices in the system also include a system power balance constraint, which is used to specify the power balance of the devices in the system. The constraint can be expressed by the formula:

u _cc (t _i )P _cc +u _elec (t _i )P _elec -u _cc (t _i )P _com =P _ess (t _i )+P _pv (t _i )i∈nh;

P _cc represents the power of the carbon capture device, P _elec represents the power of the electrolyzer, and P _com represents the compression power of CO2 pumped into the gas tank.

Furthermore, the operation constraints of the devices in the system also include gas storage constraints of the gas storage tank, which are used to specify the change of the gas in the gas storage tank. The constraint can be expressed as:

Represents the initial gas storage capacity of the gas tank, Represents the minimum/maximum gas storage capacity of the gas tank. Represents the maximum air pressure in the gas tank.

The operating constraints of the devices in the system also include energy storage efficiency constraints, which are used to specify the efficiency change of energy storage. The constraint can be expressed as:

0≤E _ess ≤E _{ess_max} P _{ess_min} ≤P _ess ≤P _{ess_max} ;

Where b represents the energy storage efficiency, E _{ess_max} represents the maximum energy storage energy, and P _{ess_min/max} represents the upper and lower limits of the energy storage power.

The operating constraints of the devices in the system also include a carbon dioxide compression power constraint, which is used to specify the compression power for compressing carbon dioxide into the gas storage tank. The constraint can be expressed as:

Under all the above constraints, the objective function is solved to obtain the control strategy of the system during the regulation period, which includes the state in which each device in the system should operate during the regulation period.

In order to verify the effectiveness of the control method provided by the present invention, a system sample was constructed and experimental verification was performed. In the experiment, a 20GP standard container was used, and a photovoltaic device was laid on the top of the container. The parameters of the devices in the system are shown in Table 1. According to the device parameters shown in Table 1, the container volume is sufficient to integrate the various devices in the system.

Table 1

parameter value parameter value Photovoltaic panel area S (m ² ) 15 Photovoltaic comprehensive efficiency K 0.85 Photovoltaic power density (KW/m ² ) 0.8 Energy storage density (KWh/kg) 0.15 Gas tank capacity (L) 200 Container (GP) 20

The optimization control is performed with a control time range (nh) of 48h and a granularity of 1 hour. The power and capacity of energy storage will affect the results. When the energy storage efficiency (b) is 0.9, the power limit and capacity of energy storage are changed, and the model is tested to determine the appropriate energy storage capacity and power limit. The energy storage capacity (E _ess/max ) is 20KWh, and the energy storage power limit (P _{ess_min/max} ) is ±5KW.

Figures 3-4 show the switching status of the carbon capture device and the electrolyzer within the control time range. Figures 5-6 show the operating power status of the carbon capture device and the electrolyzer within the control time range. Figures 7-8 show the changes in energy storage energy and energy storage power within the control time. Figure 9 shows the gas pressure status in the gas tank.

Figures 10-11 show the output of carbon monoxide/hydrogen products within the optimized control time range, indicating the optimal solution of the objective function under the target linear programming model of the target method. Under the above example conditions and the control method shown in the running results, the maximum value of the carbon monoxide/hydrogen output of the objective function within the control time range is calculated to be 33.9386mol/111.6144mol.

During the experiment, the system operated stably, proving that the regulation method provided by the present invention can achieve stable and effective control of the system.

The control device provided by the present invention is described below. The control device described below and the control method described above can be referred to each other. As shown in FIG12 , the control device provided by the present invention includes:

The parameter acquisition module 1210 is used to obtain the performance parameters of the carbon capture device, the gas storage tank, the electrolyzer, the energy storage device, the photovoltaic device, and the solar shortwave irradiance during the control period;

The control module 1220 is used to solve the target optimization function based on the performance parameters and the solar shortwave irradiance to obtain the control strategy of the system during the control period. The control strategy during the control period includes the operating parameters of each device in the system during the control period. The optimization goal of the target optimization function is to maximize the output of the electrolytic product.

FIG13 illustrates a schematic diagram of the physical structure of an electronic device. As shown in FIG13 , the electronic device may include: a processor 1310, a communication interface 1320, a memory 1330 and a communication bus 1340, wherein the processor 1310, the communication interface 1320 and the memory 1330 communicate with each other through the communication bus 1340. The processor 1310 may call the logic instructions in the memory 1330 to execute the control method of the off-grid carbon neutral fuel synthesis system, the method comprising: obtaining the performance parameters of the carbon capture device, the gas storage tank, the electrolyzer, the energy storage device, the photovoltaic device, and the solar shortwave irradiance during the control period; based on the performance parameters and the solar shortwave irradiance, solving the target optimization function, and obtaining the control strategy of the system during the control period, the control strategy during the control period includes the operating parameters of each device in the system during the control period, wherein the optimization target of the target optimization function is to maximize the output of the electrolysis product.

In addition, the logic instructions in the above-mentioned memory 1330 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or the 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 for 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 invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to execute the control method of an off-grid carbon-neutral fuel synthesis system provided by the above-mentioned methods, the method comprising: obtaining performance parameters of a carbon capture device, a gas storage tank, an electrolyzer, an energy storage device, a photovoltaic device, and the solar shortwave irradiance during a control period; based on the performance parameters and the solar shortwave irradiance, solving a target optimization function to obtain a control strategy for the system during the control period, the control strategy during the control period including the operating parameters of each device in the system during the control period, wherein the optimization target of the target optimization function is to maximize the output of electrolysis products.

The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Those of ordinary skill in the art may understand and implement it without creative effort.

Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM/RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (4)

1. A control method based on an off-grid carbon-neutral fuel synthesis system, characterized in that the off-grid carbon-neutral fuel synthesis system comprises: A carbon capture device, wherein the carbon capture device is used to collect carbon dioxide in the environment; A gas storage tank, the gas storage tank is connected to the carbon capture device and is used to store carbon dioxide; An electrolytic cell, the electrolytic cell being connected to the gas storage tank and being used to electrolyze carbon dioxide to obtain an electrolysis product; An energy storage device, the energy storage device is used to supply energy to the carbon capture device and the electrolyzer; A photovoltaic device, the photovoltaic device is used to generate electrical energy to supply energy to the carbon capture device, the electrolyzer and the energy storage device; The method comprises: Obtaining performance parameters of the carbon capture device, the gas storage tank, the electrolyzer, the energy storage device, the photovoltaic device, and the solar shortwave irradiance during the regulation period; Based on the performance parameters and the solar shortwave irradiance, solving the target optimization function, obtaining the control strategy of the system in the regulation period, wherein the control strategy in the regulation period includes the operating parameters of each device in the system in the regulation period, wherein the optimization target of the target optimization function is to maximize the output of the electrolysis product; The method of solving the target optimization function based on the performance parameter and the solar shortwave irradiance to obtain the control strategy of the system within the regulation period includes: Based on the performance parameters and the solar shortwave irradiance, under preset constraints, solving the target optimization function to obtain a control strategy for the system within the regulation period; The constraint conditions include association constraints of devices in the system and operation constraints of devices in the system; The associated constraints of the devices in the system are used to constrain the flow of carbon dioxide between the carbon capture device, the gas storage tank and the electrolyzer, and to constrain the electrical energy of the system to come from the energy storage device and the photovoltaic device; The operation constraints of the devices in the system are used to constrain the operation status of each device in the system; There are multiple control periods; the operation constraints of the devices in the system include a first constraint condition, which is used to constrain that at the end of the control period, the total change in energy in the energy storage device and the total change in carbon dioxide in the gas storage tank are both 0; The operation constraints of the devices in the system include a second constraint condition, wherein the second constraint condition is used to constrain the operation states of the carbon capture device and the electrolyzer; The second constraint is: Wherein, B(t _i ) represents the value of parameter B in the i-th granularity period, nh is the control period, Indicates the amount of gas inlet material in the gas tank, represents the amount of carbon dioxide captured by the carbon capture device, u _cc and u _elec are 0, 1 variables, representing the switch status of the carbon capture device and the electrolyzer, P _cc represents the power of the carbon capture device, a _cc represents the carbon capture conversion coefficient of the carbon capture device, P _elec represents the power of the electrolyzer, a _elec represents the electrolysis conversion coefficient of the electrolyzer, and a _was represents the loss coefficient of the electrolyzer in processing carbon dioxide; The operation constraints of the devices in the system include a third constraint condition, which is used to constrain the maximum number of continuous operation particle size time periods of the carbon capture device and the electrolyzer within the control period; the third constraint condition is: in, and They respectively represent the number of maximum continuous operation particle size periods of the carbon capture device and the electrolyzer within the regulation time range. 2. A control device based on an off-grid carbon-neutral fuel synthesis system, characterized in that the off-grid carbon-neutral fuel synthesis system comprises: A carbon capture device, wherein the carbon capture device is used to collect carbon dioxide in the environment; A gas storage tank, the gas storage tank is connected to the carbon capture device and is used to store carbon dioxide; An electrolytic cell, the electrolytic cell being connected to the gas storage tank and being used to electrolyze carbon dioxide to obtain an electrolysis product; An energy storage device, the energy storage device is used to supply energy to the carbon capture device and the electrolyzer; A photovoltaic device, the photovoltaic device is used to generate electrical energy to supply energy to the carbon capture device, the electrolyzer and the energy storage device; The control device comprises: A parameter acquisition module, used to acquire performance parameters of the carbon capture device, the gas storage tank, the electrolyzer, the energy storage device, the photovoltaic device, and the solar shortwave irradiance during a control period; A control module, used to solve the target optimization function based on the performance parameters and the solar shortwave irradiance, and obtain the control strategy of the system in the control period, wherein the control strategy in the control period includes the operating parameters of each device in the system in the control period, wherein the optimization target of the target optimization function is to maximize the output of the electrolysis product; The method of solving the target optimization function based on the performance parameter and the solar shortwave irradiance to obtain the control strategy of the system within the regulation period includes: Based on the performance parameters and the solar shortwave irradiance, under preset constraints, solving the target optimization function to obtain a control strategy for the system within the regulation period; The constraint conditions include association constraints of devices in the system and operation constraints of devices in the system; The associated constraints of the devices in the system are used to constrain the flow of carbon dioxide between the carbon capture device, the gas storage tank and the electrolyzer, and to constrain the electrical energy of the system to come from the energy storage device and the photovoltaic device; The operation constraints of the devices in the system are used to constrain the operation status of each device in the system; There are multiple control periods; the operation constraints of the devices in the system include a first constraint condition, which is used to constrain that at the end of the control period, the total change in energy in the energy storage device and the total change in carbon dioxide in the gas storage tank are both 0; The operation constraints of the devices in the system include a second constraint condition, wherein the second constraint condition is used to constrain the operation states of the carbon capture device and the electrolyzer; The second constraint is: Wherein, B(t _i ) represents the value of parameter B in the i-th granularity period, nh is the control period, Indicates the amount of gas inlet material in the gas tank, represents the amount of carbon dioxide captured by the carbon capture device, u _cc and u _elec are 0, 1 variables, representing the switch status of the carbon capture device and the electrolyzer, P _cc represents the power of the carbon capture device, a _cc represents the carbon capture conversion coefficient of the carbon capture device, P _e ^l _ec represents the power of the electrolyzer, a _elec represents the electrolysis amount conversion coefficient of the electrolyzer, and a _was represents the loss coefficient of the electrolyzer in processing carbon dioxide; The operation constraints of the devices in the system include a third constraint condition, which is used to constrain the maximum number of continuous operation particle size time periods of the carbon capture device and the electrolyzer within the control period; the third constraint condition is: in, and They respectively represent the number of maximum continuous operation particle size periods of the carbon capture device and the electrolyzer within the regulation time range. 3. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the control method as claimed in claim 1 when executing the computer program. 4. A non-transitory computer-readable storage medium having a computer program stored thereon, wherein the computer program implements the control method as claimed in claim 1 when executed by a processor.