Method and system for determining hydrogen storage volume of hydrogen production system and storage medium

Abstract

The invention discloses a method and system for determining the hydrogen storage volume of a hydrogen production system and a storage medium, and relates to the technical field of hydrogen production, hydrogen storage and pipeline hydrogen transportation, and the method comprises the following steps: S1, obtaining the annual hydrogen unit time fluctuation yield of a hydrogen production unit, and setting the hydrogen storage volume; s2, the average hydrogen conveying amount of the hydrogen storage unit in each time period is determined according to the hydrogen unit time fluctuation yield and the hydrogen storage volume; s3, performing analog simulation calculation on the long-distance pipeline unit by taking the average hydrogen conveying amount of each time period as a boundary condition to obtain an analog simulation result; s4, judging whether the analog simulation result can pass pipeline fatigue checking or not; if not, the hydrogen storage volume of the hydrogen storage unit is reset, the steps S2-S4 are repeated till the fatigue checking requirement is met, and the final hydrogen storage volume is determined. Through the content of the invention, the hydrogen storage volume without influencing the service life of the pipeline can be reasonably set, and the effects of reducing the configuration investment and safety cost of the storage tank and guaranteeing the service life of the hydrogen conveying pipeline are achieved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of hydrogen production, storage and transmission, and in particular to a method, system and storage medium for determining the hydrogen storage volume of a hydrogen production system. Background Art

[0002] Hydrogen energy, with its multiple properties as a carrier of renewable energy and a zero-carbon, pollution-free, high-quality raw material and fuel, can play an important role in the transformation of the energy supply and consumption sides.

[0003] In the existing technology, wind and solar energy systems are usually used to generate electricity for electrolytic hydrogen production, and storage tanks are configured to cache hydrogen. The current common wind and solar power generation hydrogen production mode is to achieve continuous output of low-fluctuation electricity with high utilization hours through the synergistic complementarity of wind power generation units and photovoltaic power generation units, and be equipped with necessary power storage units to promote further smooth output of electricity, and to adapt the wide power capacity with the electrolytic hydrogen production unit to reduce the high-frequency and large-scale fluctuation output of the produced hydrogen, so as to minimize the volume of the hydrogen storage spherical tank unit.

[0004] The inherent characteristics of the current mainstream hydrogen production mode, namely the synergistic complementarity of wind and solar power generation and the wide power capacity adaptation to the electrolytic hydrogen production unit, determine that the volatility of hydrogen production can only be reduced as much as possible, but the volatility of hydrogen production cannot be eliminated, which brings about the storage and transportation problems of fluctuating hydrogen production. On the one hand, a large-scale hydrogen storage unit can be configured after the hydrogen production unit to achieve full buffering of fluctuating hydrogen production, thereby achieving smooth transportation of hydrogen. However, the large-scale configuration of hydrogen storage spherical tanks not only brings higher safety risks, but also increases the land investment and equipment investment, and increases the cost of use. On the other hand, it is not necessary to set up a hydrogen storage unit, and rely on the long-distance pipeline unit to absorb the volatility of hydrogen production, but this will bring about large-scale and high-frequency pressure fluctuations of varying degrees throughout the long-distance pipeline unit, which will in turn bring about fatigue problems in the transportation pipeline, affecting the long-term service life of the pipeline. Summary of the invention

[0005] The present disclosure provides a method, system and storage medium for determining the hydrogen storage volume of a hydrogen production system, which reduces the hydrogen storage tank configuration cost and ensures the service life of a long-distance hydrogen transmission pipeline by reasonably setting the hydrogen storage volume without affecting the pipeline life.

[0006] In a first aspect, the present disclosure provides a method for determining the hydrogen storage capacity of a hydrogen production system, wherein the hydrogen production system comprises a hydrogen production unit, a hydrogen storage unit, and a long-distance pipeline unit connected in sequence; the hydrogen storage capacity control method comprises:

[0007] S1. Obtain the hydrogen production per unit time fluctuation of the hydrogen production unit throughout the year, and set the hydrogen storage capacity of the hydrogen storage unit;

[0008] S2. Determine the average hydrogen delivery volume output from the hydrogen storage unit to the long-distance pipeline unit in each time period according to the hydrogen production unit's annual unit time fluctuation production and the set hydrogen storage volume;

[0009] S3, taking the average hydrogen delivery volume in each time period as the boundary condition, simulating and calculating the long-distance pipeline unit to obtain the simulation result;

[0010] S4, judging whether the simulation result can pass the pipeline fatigue check of the long-distance pipeline unit;

[0011] If not, the hydrogen storage capacity of the hydrogen storage unit is reset, and steps S2-S4 are repeated until the fatigue check requirements are met, and the final hydrogen storage capacity is determined.

[0012] In some embodiments, the simulation calculation of the long-distance pipeline unit to obtain the simulation result includes:

[0013] Through simulation calculation, the relationship between the pipeline pressure at the most significant fluctuation position of the long-distance pipeline unit and time is obtained;

[0014] According to the relationship between the pipeline pressure and time, the fluctuation data of the pipeline pressure is determined; the fluctuation data includes at least one of the fluctuation amplitude and the fluctuation frequency.

[0015] In some embodiments, before the step of determining whether the simulation result can pass the pipeline fatigue check of the long-distance pipeline unit, the method further includes:

[0016] Acquiring pipeline attribute information of the long-distance pipeline unit;

[0017] According to the pipeline attribute information of the long-distance pipeline unit, the pipeline fatigue crack propagation behavior is determined, and then the pressure fluctuation threshold of the pipeline fatigue check of the long-distance pipeline unit is determined.

[0018] In some embodiments, determining whether the simulation result can pass the pipeline fatigue check of the long-distance pipeline unit includes:

[0019] Using the simulation results as boundary conditions and combining the pressure fluctuation threshold, the pipeline fatigue check of the long-distance pipeline unit is performed;

[0020] It is determined whether the pressure fluctuation data of the simulation result exceeds the pressure fluctuation threshold of the pipeline fatigue check, and whether the simulation result can pass the pipeline fatigue check of the long-distance pipeline unit is determined based on the judgment result.

[0021] In some embodiments, the method of determining the average hydrogen delivery volume outputted from the hydrogen storage unit to the long-distance pipeline unit in each time period according to the hydrogen production unit's annual unit time fluctuation production and the set hydrogen storage volume includes:

[0022] According to the hydrogen production unit's annual unit time fluctuation production and the set hydrogen storage volume, a judgment condition is established for judging whether the hydrogen production of the hydrogen production unit in any period can be stably input from the hydrogen storage unit to the long-distance pipeline unit at the average hydrogen production of the period;

[0023] The determination condition is used to divide the hydrogen production per unit time fluctuation of the hydrogen production unit throughout the year into several time periods, so that the hydrogen production fluctuation in each time period can be stably output according to the average hydrogen production in the time period;

[0024] Based on the division results, the average hydrogen delivery volume outputted from the hydrogen storage unit to the long-distance pipeline unit in each time period is determined.

[0025] In some embodiments, the determination condition is used to divide the hydrogen production per unit time fluctuation of the hydrogen production unit throughout the year into several time periods, so that the hydrogen production fluctuation in each time period can be stably output according to the average hydrogen production in the time period, including:

[0026] The hydrogen production of the hydrogen production unit throughout the year is accumulated starting from the first unit time, and the average hydrogen production in the accumulated time period is simultaneously calculated until the average hydrogen production in the accumulated time period does not meet the judgment condition;

[0027] Pick up the time period that meets the judgment conditions before the cumulative calculation stops, as well as the hydrogen fluctuation production and average hydrogen production per unit time in the time period;

[0028] Starting from picking up the next unit time of the time period that meets the judgment conditions, the above steps are repeated until all the hydrogen unit time fluctuation production of the hydrogen production unit throughout the year are traversed to obtain the hydrogen fluctuation production of several time periods.

[0029] In some embodiments, the hydrogen production of the hydrogen production unit throughout the year is accumulated starting from the first unit time, and the average hydrogen production in the accumulated time period is simultaneously calculated until the average hydrogen production in the accumulated time period does not meet the judgment condition, including:

[0030] The hydrogen production of the hydrogen production unit throughout the year is accumulated starting from the first unit time to determine the sum of the hydrogen fluctuation production in the accumulation time period;

[0031] Calculate the average hydrogen production in this period according to the sum of the hydrogen fluctuation production in the accumulated time period;

[0032] Determine whether the average hydrogen production during this period meets the determination conditions;

[0033] If it is in compliance, the cumulative calculation of hydrogen fluctuation production will continue, and the cumulative time period and the average hydrogen production in the time period will be updated;

[0034] If it does not meet the requirements, the accumulation calculation will be stopped.

[0035] In a second aspect, the present disclosure provides a hydrogen production system, comprising a hydrogen production unit, a hydrogen storage unit, a long-distance pipeline unit and a control unit; the hydrogen production unit, the hydrogen storage unit and the long-distance pipeline unit are connected in sequence and are all connected to the control unit; the control unit is used to execute the method described in the above aspects.

[0036] In a third aspect, the present disclosure provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of the method described in the above aspects.

[0037] In a fourth aspect, the present disclosure provides a computer-readable storage medium having a computer program stored thereon, which implements the steps of the method described in the above aspects when executed by a processor.

[0038] In a fifth aspect, the present disclosure provides a computer program product, including a computer program, which implements the steps of the method described in the above aspects when executed by a processor.

[0039] Compared with the prior art, one or more embodiments of the above scheme may have the following advantages or beneficial effects:

[0040] The present disclosure provides a method, system and storage medium for determining the hydrogen storage volume of a hydrogen production system. By adopting a hydrogen storage unit as the starting point for transmission to a long-distance pipeline unit, hydrogen can be stored in combination with the hydrogen storage unit and the long-distance pipeline, taking into account the hydrogen buffering capacity of the hydrogen storage unit and the hydrogen storage capacity of the long-distance pipeline unit itself, thereby reducing the volume requirements of the hydrogen production system for the hydrogen storage unit and reducing the project investment cost; by performing fatigue check of the pipeline through simulation calculation, it is possible to analyze whether the average hydrogen delivery volume output from the hydrogen storage unit to the long-distance pipeline unit in each time period will have an impact on the long-distance pipeline. If an impact is produced, the hydrogen storage volume is adjusted, thereby correspondingly adjusting the average hydrogen delivery volume, so that the final set allowable hydrogen storage volume meets the requirements of the pipeline fatigue check, and the size of the hydrogen storage volume that does not affect the pipeline life is reasonably set, thereby achieving the effect of reducing the configuration cost of the hydrogen storage tank and ensuring the service life of the hydrogen long-distance pipeline.

[0041] By dividing the annual fluctuating hydrogen production of the hydrogen production unit into several time periods that meet the judgment conditions, the hydrogen delivered to the inlet of the long-distance pipeline unit can be output with small amplitude and low frequency fluctuations, reducing the volume requirements of the hydrogen storage unit, so that the hydrogen with fluctuating production produced by the hydrogen production unit can be relatively smoothly transported within the long-distance pipeline unit, thereby improving the stability of the long-distance pipeline operation. Based on the compressibility of hydrogen, the outlet of the long-distance pipeline is controlled by pressure regulation to achieve stable output, thereby improving the stability of hydrogen use at the outlet of the long-distance pipeline and reducing the safety risks and investment costs of large-scale hydrogen storage tank configuration of the hydrogen storage unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The present disclosure will be described in more detail below based on embodiments and with reference to the accompanying drawings:

[0043] Figure 1 A schematic flow chart of a method for determining the hydrogen storage capacity of a hydrogen production system provided in an embodiment of the present disclosure;

[0044] Figure 2 A schematic diagram of the connection relationship between the units of the hydrogen production system provided in the embodiment of the present disclosure;

[0045] Figure 3 The embodiment of the present disclosure corresponds to Figure 1 An exemplary flow chart of step S2 in FIG.

[0046] Figure 4 The embodiment of the present disclosure corresponds to Figure 3 An exemplary flow chart of step S21 in FIG.

[0047] Figure 5 It is a line diagram of an embodiment of the present disclosure for reflecting the supply and demand balance principle of hydrogen filling and degassing of a storage tank and the matching relationship between the volume of a hydrogen storage unit and the gas transmission volume of a long-distance pipeline unit;

[0048] Figure 6 The embodiment of the present disclosure corresponds to Figure 3 An exemplary flow chart of step S22 in FIG.

[0049] Figure 7 The embodiment of the present disclosure corresponds to Figure 5 An exemplary flow chart of step S221 in FIG.

[0050] Figure 8 A schematic diagram showing the comparison of hydrogen output fluctuations in each period when the production mode and the tank configuration method of the embodiment of the present disclosure are configured with 10 storage tanks and when no hydrogen storage spherical tank is provided;

[0051] Fig. 9 The embodiment of the present disclosure corresponds to Figure 1 An exemplary flow chart of step S31 in FIG.

[0052] Fig.10 A schematic diagram showing a comparison of pressure fluctuations at the initial end of a long-distance pipeline when 10 hydrogen storage spherical tanks are provided and when no hydrogen storage spherical tanks are provided in an embodiment of the present disclosure;

[0053] Fig.11 The embodiment of the present disclosure corresponds to Figure 1 An exemplary flow chart set before step S4 in FIG.

[0054] Fig.12 The embodiment of the present disclosure corresponds to Figure 1 An exemplary flow chart of step S4 in FIG.

[0055] Fig.13 A schematic diagram of pipeline fatigue verification under pressure fluctuation conditions according to an embodiment of the present disclosure;

[0056] Fig.14 is an exemplary structural schematic diagram of a hydrogen production system in an embodiment of the present disclosure;

[0057] Fig.15 A schematic block diagram of an electronic device provided in an embodiment of the present disclosure;

[0058] Fig.16 A schematic diagram of a readable storage medium provided in an embodiment of the present disclosure.

[0059] In the drawings, the same reference numerals are used for the same components, and the drawings are not drawn to scale.

[0060] In the figure: 1. Wind power generation unit; 2. Photovoltaic power generation unit; 3. Power storage unit; 4. Electrolysis hydrogen production unit; 5. Hydrogen storage unit; 6. Long-distance pipeline unit; 7. Control unit. DETAILED DESCRIPTION

[0061] In order to enable those skilled in the art to better understand the technical solution of the present disclosure, and to fully understand and implement how the present disclosure applies technical means to solve technical problems and achieve the corresponding technical effects, the technical solution in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only embodiments of a part of the present disclosure, not all of the embodiments. The embodiments of the present disclosure and the various features in the embodiments can be combined with each other without conflict, and the technical solutions formed are all within the scope of protection of the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of the present disclosure.

[0062] It should be noted that the terms "first", "second", etc. in the specification and claims of the present disclosure 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 disclosure described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof 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.

[0063] It should be noted that the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and that, although a logical order is shown in the flowcharts, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0064] In the wind-solar synergistic power generation and electrolysis hydrogen production mode, the current common method is to use high-pressure gaseous hydrogen storage tanks to fill and release the volatile hydrogen produced. When the amount of hydrogen produced by electrolysis is greater than the demand for hydrogen utilization, the excess hydrogen will enter the storage tank for buffering. When the amount of hydrogen produced is less than the demand for hydrogen, the previously buffered hydrogen can be released from the storage tank for replenishment. In the case of small wind and solar power generation capacity and hydrogen production scale, the volume demand for storage tanks is not too large, and the constraints on construction investment and safety risks are not very obvious. However, large-scale wind and solar bases and large-scale hydrogen production are the mainstream of my country's current and future hydrogen industry chain development. The demand for hydrogen production is presented in the form of tens of thousands of tons, hundreds of thousands of tons, and even millions of tons. The large-scale and unstable production of hydrogen has created a strong demand for hydrogen storage capacity. For example, the Sinopec Xinjiang Kuche Photovoltaic Power Generation Green Hydrogen Demonstration Project, which has been put into production, has a hydrogen storage capacity of 210,000 standard cubic meters against the background of an annual hydrogen production capacity of 20,000 tons. For this purpose, 10 2,000m 3 Water volume storage tank. The publicly reported 3.5 million kilowatt three-dimensional wind-solar hydrogen sand control and aviation fuel production integrated demonstration project in Ulan Buh, Alxa League, has a planned hydrogen storage capacity of 780,000 standard cubic meters. The centralized arrangement of a large number of hydrogen storage tanks in large-scale hydrogen production bases brings multiple challenges such as safety risks, land investment and equipment investment, which also indirectly restricts the commercial development of the wind-solar power generation and hydrogen production industry chain. On the other hand, it is also possible to rely on long-distance pipeline units to absorb the volatility of hydrogen production without setting up hydrogen storage units, but this will bring about large-scale and high-frequency pressure fluctuations of varying degrees throughout the long-distance pipeline units, which will in turn bring about fatigue problems in the transmission pipelines and affect the long-term service life of the pipelines.

[0065] The disclosed embodiment provides a method for determining the hydrogen storage volume of a hydrogen production system, and the hydrogen storage volume control method comprises: S1, obtaining the hydrogen production per unit time fluctuation of the hydrogen production unit throughout the year, and setting the hydrogen storage volume of the hydrogen storage unit; S2, determining the average hydrogen delivery amount outputted from the hydrogen storage unit to the long-distance pipeline unit in each time period according to the hydrogen production unit's ... By adopting the hydrogen storage unit as the starting point for transmission to the long-distance pipeline unit, hydrogen can be stored in combination with the hydrogen storage unit and the long-distance pipeline, taking into account the hydrogen buffering capacity of the hydrogen storage unit and the hydrogen storage capacity of the long-distance pipeline unit itself, thereby reducing the volume requirements of the hydrogen production system for the hydrogen storage unit and reducing the project investment cost; by performing pipeline fatigue verification through simulation calculations, it is possible to analyze whether the average hydrogen delivery volume output from the hydrogen storage unit to the long-distance pipeline unit in each time period will have an impact on the long-distance pipeline. If an impact is produced, the hydrogen storage volume is adjusted, thereby correspondingly adjusting the average hydrogen delivery volume, so that the final set allowable hydrogen storage volume meets the requirements of pipeline fatigue verification, and the hydrogen storage volume size that does not affect the life of the pipeline is reasonably set, thereby achieving the effect of reducing the configuration cost of the hydrogen storage tank and ensuring the service life of the hydrogen long-distance pipeline.

[0066] Embodiment 1

[0067] Figure 1 A schematic flow chart of a method for determining the hydrogen storage volume of a hydrogen production system provided in an embodiment of the present disclosure.

[0068] The hydrogen storage and transportation method of the hydrogen production system provided in this embodiment can be implemented in the form of software, hardware, firmware or any combination thereof, and loaded and executed by a processor in a device such as a mobile phone, tablet computer, laptop computer, desktop computer, network server, etc., so as to reasonably set the hydrogen storage volume that does not affect the life of the pipeline, thereby reducing the configuration cost of the hydrogen storage tank and ensuring the service life of the long-distance hydrogen transmission pipeline.

[0069] In this embodiment, the power generation unit includes any one or both of the wind power generation unit 1 and the photovoltaic power generation unit 2, depending on the actual resource conditions of the project. Figure 2As shown, the power generation unit adopts the wind power generation unit 1 and the photovoltaic power generation unit 2 in a coordinated and complementary manner to generate electricity, realize the continuous output of low-fluctuation electricity with high utilization rate, and configure the power storage unit 3 to promote the further smooth output of electricity. The wind power generation unit 1, the photovoltaic power generation unit 2 and the power storage unit 3 cooperate with the electrolytic hydrogen production unit 4 to adapt the wide power capacity, so as to reduce the high-frequency and large-scale fluctuation output of the hydrogen produced by the hydrogen production unit, thereby firstly reducing the volume requirement of the hydrogen storage unit as much as possible from the source.

[0070] In this embodiment, after the hydrogen is produced by the hydrogen production unit 4, it is transported to the hydrogen storage unit 5 for buffering and storage, and then transported to the long-distance pipeline unit 6 through the hydrogen storage unit 5, so as to take into account the hydrogen buffering capacity of the hydrogen storage unit 5 and the hydrogen storage capacity of the long-distance pipeline unit 6 itself, and establish a "hydrogen production end storage tank + pipeline hydrogen storage" storage and transportation mode, which can reduce the property parameter requirements of the engineering project for the hydrogen storage unit, reduce the volume requirements of the hydrogen storage unit, and reduce investment costs and safety risks.

[0071] Reference below Figure 1 and Figure 2 As shown, the method for determining the hydrogen storage capacity of the hydrogen production system provided in the embodiment of the present disclosure is described. The method for determining the hydrogen storage capacity of the hydrogen production system includes steps S1 to S4, which are specifically as follows:

[0072] S1. Obtain the hydrogen production per unit time fluctuation of the hydrogen production unit throughout the year, and set the hydrogen storage capacity of the hydrogen storage unit.

[0073] In some embodiments, setting the hydrogen storage capacity of the hydrogen storage unit includes:

[0074] Determine the tank safety risk that the hydrogen production unit can bear based on the annual hydrogen production unit unit time fluctuation production;

[0075] Based on the project investment cost and the tank safety risk that the hydrogen production unit can withstand, the hydrogen storage capacity of the hydrogen storage unit that can participate in hydrogen filling and release is determined.

[0076] In some embodiments, the hydrogen storage unit includes a plurality of storage tanks, and the sum of the volumes of the plurality of storage tanks is the hydrogen storage capacity of the hydrogen storage unit. In the hydrogen production system, when the gas consumption is less than the gas supply, the hydrogen storage unit stores excess hydrogen to fill the shortfall when the gas consumption is greater than the gas supply. The time when the gas consumption is lower than the average hourly gas supply is the period when the gas enters the hydrogen storage unit, and the time when the gas consumption is higher than the average hourly gas supply is the period when the gas enters the long-distance pipeline from the hydrogen storage unit. Therefore, the theoretical volume of the hydrogen storage unit is equal to the difference between the highest and lowest values ​​of the working curve of the hydrogen storage unit.

[0077] S2. Determine the average hydrogen delivery volume output from the hydrogen storage unit to the long-distance pipeline unit in each time period based on the hydrogen production unit's annual unit time fluctuation production and the set hydrogen storage volume.

[0078] In some embodiments, step S2, such as Figure 3 As shown, including S21-S23, specifically:

[0079] S21. Based on the hydrogen production per unit time fluctuation of the hydrogen production unit throughout the year and the set hydrogen storage volume, a judgment condition is established to determine whether the hydrogen production of the hydrogen production unit in any period of time can be stably input from the hydrogen storage unit to the long-distance pipeline unit at the average hydrogen production of the period.

[0080] In some embodiments, step S21, such as Figure 4 As shown, including:

[0081] S211. Based on the supply and demand balance principle of hydrogen filling and degassing in the storage tank, a matching relationship between the set hydrogen storage volume and the hydrogen fluctuating output at the beginning of the input long-distance pipeline unit is established;

[0082] S212, according to the hydrogen production unit's annual unit time fluctuation production of hydrogen and the matching relationship between the hydrogen storage volume and the hydrogen fluctuation delivery at the beginning of the input long-distance pipeline unit, determine the average hydrogen production matched by the hydrogen storage volume in any period of time; the average hydrogen production is used as the hydrogen fluctuation delivery at the beginning of the input long-distance pipeline unit;

[0083] S213, constructing the hydrogen storage volume that matches the average hydrogen production in any time period smaller than the hydrogen storage volume set by the hydrogen storage unit as a determination condition for stable output from the hydrogen storage unit and then entering the long-distance pipeline unit.

[0084] Furthermore, the supply and demand balance principle of hydrogen filling and degassing in the storage tank is that when the gas volume of the long-distance pipeline is less than the gas supply, the storage tank will store excess hydrogen to make up for the shortfall when the gas volume of the long-distance pipeline is greater than the gas supply; the time when the pipeline gas volume is lower than the average hourly gas supply is the period when the gas enters the storage tank, and vice versa, it is the period when the gas enters the long-distance pipeline from the storage tank. Therefore, the theoretical volume of the hydrogen storage unit is the difference between the highest and lowest values ​​of the working curve of the hydrogen storage unit. The supply and demand balance principle of hydrogen filling and degassing in the storage tank is as follows: Figure 5 As shown, when the gas volume change curve is low, the hydrogen storage unit working curve increases, and when the gas volume change curve is high, the hydrogen storage unit working curve decreases, so that the relationship between the hydrogen storage unit working curve and the gas volume change curve of the long-distance pipeline unit can be determined. Figure 5 The matching relationship between the set hydrogen storage volume and the steady hydrogen delivery volume at the beginning of the long-distance pipeline unit during the time period shown.

[0085] Based on the above principle, in the embodiment of the present application, the average hydrogen production of any period in the hydrogen production fluctuation production of the hydrogen production unit throughout the year is used as the input amount of hydrogen transported by the hydrogen storage unit to the long-distance pipeline unit. Therefore, the hydrogen production per unit time fluctuation of the hydrogen production unit throughout the year and the matching relationship between the hydrogen storage volume and the hydrogen fluctuation input volume at the beginning of the long-distance pipeline unit can be used to determine the hydrogen storage volume that matches the average hydrogen production in any period of time, and then compare the hydrogen storage volume that matches the average hydrogen production with the actual maximum hydrogen storage volume of the hydrogen storage unit of the project to determine whether the average hydrogen production in the current period can be stably transported. In this way, the judgment conditions are constructed, which is conducive to the next step of dividing the hydrogen production of the hydrogen production unit throughout the year into several time periods, thereby ensuring that the long-distance pipeline unit has a small amplitude and low-frequency fluctuation output when transporting hydrogen, which is conducive to the stable output of hydrogen.

[0086] S22. Using the determination conditions, the hydrogen production per unit time of the hydrogen production unit throughout the year is divided into a number of time periods, so that the hydrogen production fluctuation in each time period can be stably output according to the average hydrogen production in the time period.

[0087] In some embodiments, step S22, such as Figure 6 As shown, including S221-S223, specifically:

[0088] S221. Accumulate the hydrogen production of the hydrogen production unit throughout the year starting from the first unit time, and simultaneously calculate the average hydrogen production in the accumulated time period until the average hydrogen production in the accumulated time period does not meet the judgment condition.

[0089] In some embodiments, step S221, such as Figure 7 As shown, specifically including:

[0090] S2211, cumulatively calculating the hydrogen production of the hydrogen production unit throughout the year starting from the first unit time, and determining the sum of the hydrogen fluctuation production in the cumulative time period;

[0091] S2212, calculating the average hydrogen production in the period according to the sum of the hydrogen fluctuation production in the accumulated time period;

[0092] S2213, judging whether the average hydrogen production during the period meets the judgment condition;

[0093] If it is in compliance, the cumulative calculation of hydrogen fluctuation production will continue, and the cumulative time period and the average hydrogen production in the time period will be updated;

[0094] If it does not meet the requirements, the accumulation calculation will be stopped.

[0095] Among them, the process of judging whether the average hydrogen production of the time period meets the judgment conditions is as follows: by inputting the average hydrogen production into the judgment conditions, determining the hydrogen storage volume corresponding to the average hydrogen production, and then comparing the hydrogen storage volume corresponding to the average hydrogen production by the volume requirement value set by the hydrogen storage unit of the project in the judgment conditions. When the volume requirement value set by the hydrogen storage unit of the project is greater than or equal to the hydrogen storage volume corresponding to the average hydrogen production, it is determined that the average hydrogen production of the time period meets the judgment conditions, that is, the average hydrogen production of the time period can be stably output; if it is less than, it is determined that it does not meet the judgment conditions and stops the cumulative calculation. In the above manner, the fluctuating hydrogen production originally produced by the hydrogen production unit is combined with the buffering and storage function of the hydrogen storage unit, and the average hydrogen production of the time period is used as the delivery volume of the hydrogen storage unit to the long-distance pipeline unit, so that the input of the pipeline head end of the long-distance pipeline unit is relatively stable, the volume requirement of the hydrogen storage unit is reduced, and the construction investment and safety risks are reduced.

[0096] S222, picking up the time period that meets the determination condition before the cumulative calculation stops, and the hydrogen fluctuation production and average hydrogen production per unit time in the time period;

[0097] S223, starting from picking up the next unit time of the time period that meets the judgment conditions, the above steps are repeated until all the hydrogen unit time fluctuation production of the hydrogen production unit throughout the year are traversed to obtain the hydrogen fluctuation production of several time periods.

[0098] S23. Based on the division result, determine the average hydrogen delivery volume outputted from the hydrogen storage unit to the long-distance pipeline unit in each time period.

[0099] In some embodiments, step S2 is used to traverse all the hydrogen unit time fluctuation production of the hydrogen production unit throughout the year to obtain the hydrogen fluctuation production of several time periods, so that the original hydrogen fluctuation production of the hydrogen production unit can be divided into the average fluctuation production in multiple time periods, so that it can be divided into several long-term small-amplitude fluctuation outputs to the pipeline input end of the long-distance pipeline unit, and stable output is performed within the divided time periods, and small-amplitude fluctuations are formed when entering the next time period, which is conducive to utilizing the long-distance pipeline unit to stably output and store hydrogen, improve the stability of hydrogen transmission, and reduce the volume requirements of the hydrogen storage unit.

[0100] In some specific embodiments, the number of hydrogen storage tanks configured in the hydrogen storage unit set by the method is ten, and the hydrogen fluctuating output produced by the hydrogen production unit for 140 hours is taken as an example. Figure 8As shown, the solid line portion is the fluctuation change line of the hydrogen production input to the starting end of the long-distance pipeline unit when the hydrogen production unit is directly connected to the long-distance pipeline unit for transportation, or the solid line portion is represented as the hydrogen production unit connected to the long-distance pipeline unit through the hydrogen storage unit, and the hydrogen production fluctuation change line of the hydrogen storage unit; and the dotted line portion in the figure is the average hydrogen production under multiple time periods divided by the method provided in the embodiment of the present disclosure as the hydrogen production fluctuation change line input to the starting end of the long-distance pipeline unit by the hydrogen storage unit in each time period. It can be clearly seen that when ten storage tanks are used to configure the hydrogen storage unit and the method provided in this embodiment is used to control the storage and transmission amount of hydrogen by the hydrogen storage unit, the hydrogen input amount of the long-distance pipeline unit remains stable within the divided time period, and after a small fluctuation is formed when entering the next time period, a stable output can still be maintained in the next time period, which is beneficial to improve the stability of long-distance pipeline hydrogen transportation and reduce the volume requirement of the hydrogen storage unit.

[0101] S3. Taking the average hydrogen delivery volume in each time period as the boundary condition, the long-distance pipeline unit is simulated and calculated to obtain the simulation results.

[0102] In some embodiments, a simulation calculation is performed on a long-distance pipeline unit to obtain a simulation result, such as Fig. 9 As shown, including:

[0103] S31, obtaining the relationship between the pipeline pressure at the position where the long-distance pipeline unit fluctuates most significantly and time through simulation calculation;

[0104] S32. Determine fluctuation data of the pipeline pressure according to the relationship between the change of the pipeline pressure and time; the fluctuation data includes at least one of fluctuation amplitude and fluctuation frequency.

[0105] Among them, during the simulation calculation, the average hydrogen delivery volume in each time period is used as the boundary condition, and the pressure change of the long-distance pipeline caused by the average hydrogen delivery volume in each time period is simulated and calculated, so as to obtain the relationship between the pipeline pressure at the most significant fluctuation position of the long-distance pipeline unit and time, and extract the characteristic parameters such as the fluctuation amplitude and fluctuation frequency of the pipeline pressure, so as to verify whether the average hydrogen delivery volume will cause fatigue damage to the pipeline.

[0106] In some specific embodiments, Fig.10As shown, a schematic diagram of a specific case obtained under the production mode and tank configuration method, wherein the hydrogen storage capacity of the hydrogen storage unit set after step S1 is a schematic diagram comparing the pressure fluctuations at the initial end of the long-distance pipeline with and without 10 hydrogen storage spherical tanks. As can be seen from the schematic diagram, the frequency and amplitude of the pressure fluctuations at the typical position of 10 hydrogen storage spherical tanks have been significantly reduced. It can be seen from the figure that the pressure fluctuation data when the hydrogen storage capacity of the hydrogen storage unit is 10 hydrogen storage spherical tanks.

[0107] In some embodiments, before performing step S4, Fig.11 As shown, the method also includes:

[0108] S041. Obtaining pipeline attribute information of the long-distance pipeline unit;

[0109] S402: Determine the pipeline fatigue crack propagation behavior according to the pipeline attribute information of the long-distance pipeline unit, and then determine the pressure fluctuation threshold of the pipeline fatigue check of the long-distance pipeline unit.

[0110] Among them, the pipeline attribute information described in step S041 includes the process attribute information of the pipeline material and the process attribute information of the weld material at the pipeline welding point. The pipeline attribute information is combined with the different pipeline fatigue load information set in the laboratory to determine the stress intensity factor that affects the crack growth rate of the long-distance pipeline unit. This is one of the current mainstream pipeline fatigue crack growth behavior research and analysis methods.

[0111] Step S042 specifically includes obtaining the stress intensity factor that affects the crack growth rate according to the pipeline attribute information of the long-distance pipeline unit and the different pipeline fatigue load information set in the laboratory, and then further determining the pressure fluctuation threshold of the long-distance pipeline unit that satisfies the pipeline fatigue check, so as to facilitate judging whether the simulation results can pass the pipeline fatigue check through step S4.

[0112] S4. Determine whether the simulation result can pass the pipeline fatigue check of the long-distance pipeline unit.

[0113] If so, it means that the initial hydrogen storage capacity of the hydrogen storage unit is set reasonably, so that the average hydrogen production in several time periods is used as the input amount of the hydrogen storage unit to the starting end of the long-distance pipeline unit in each time period for transportation, and then combined with the pressure regulation control at the outlet end of the long-distance pipeline unit, the stable transportation of long-distance pipeline hydrogen can be achieved.

[0114] If not, the hydrogen storage capacity of the hydrogen storage unit is reset, and steps S2-S4 are repeated until the fatigue check requirements are met, and the final hydrogen storage capacity is determined.

[0115] In some embodiments, step S4, such as Fig.12As shown, including:

[0116] S401, using the simulation result as a boundary condition and combining it with the pressure fluctuation threshold, checking the pipeline fatigue of the long-distance pipeline unit;

[0117] S402, judging whether the pressure fluctuation data of the simulation result exceeds the pressure fluctuation threshold of the pipeline fatigue check, and determining whether the simulation result can pass the pipeline fatigue check of the long-distance pipeline unit based on the judgment result.

[0118] Among them, when the pressure fluctuation data exceeds the pressure fluctuation threshold of the pipeline fatigue check, it is judged that the simulation result cannot pass the pipeline fatigue check of the long-distance pipeline unit; when the pressure fluctuation data does not exceed the pressure fluctuation threshold of the pipeline fatigue check, it is judged that the simulation result can pass the pipeline fatigue check of the long-distance pipeline unit.

[0119] Through this step, it is only necessary to compare the pressure fluctuation data in the simulation results with the pressure fluctuation threshold to analyze whether the pressure fluctuation data will cause damage to the pipeline.

[0120] In some specific embodiments, Fig.13 The schematic diagram of one of the pipeline fatigue verification analysis methods under pressure fluctuation conditions is shown in the figure. The fatigue crack growth behavior analysis of a hydrogen transmission pipe is carried out, and it is pointed out that under fatigue load, the influence of hydrogen on the crack growth rate of the pipeline material has a threshold value, and the stress intensity factor is 12MP*m 1 / 2 When the stress intensity factor is greater than 12MP*m, hydrogen has almost no effect on the crack growth rate. 1 / 2 After that, hydrogen causes the crack growth rate to increase by an order of magnitude. It can be seen that the pressure fluctuation threshold of the crack growth data of the pipeline material is 12MP*m 1 / 2， , and according to the above Figure 8 and Fig.10 As shown, by setting the pressure fluctuation data of the hydrogen storage capacity of the hydrogen storage unit to 10 hydrogen storage spherical tanks with a fluctuation range of 3.0-5.0MPa, and comparing it with the pressure fluctuation threshold of the crack extension data of the pipeline material, it can be determined that the pressure fluctuation data of the hydrogen storage unit with the hydrogen storage capacity to 10 hydrogen storage spherical tanks can meet the requirements, that is, the average hydrogen delivery amount output to the long-distance pipeline unit in each time period determined under the tank capacity of 10 hydrogen storage spherical tanks can be used as the input amount of the hydrogen storage unit to the starting end of the long-distance pipeline unit in each time period for delivery, and then combined with the pressure regulation control at the outlet of the long-distance pipeline unit, the stable delivery of long-distance pipeline hydrogen can be achieved.

[0121] Therefore, it is only necessary to compare the simulation results with the pressure fluctuation threshold under the threshold value of the stress intensity factor of the pipeline to analyze whether it has an impact on the pipeline life.

[0122] In some embodiments, the hydrogen storage and transportation method also includes: obtaining the property parameters of the long-distance pipeline unit; determining the hydrogen transmission pressure range in the long-distance pipeline unit based on the property parameters of the long-distance pipeline unit and the compression performance of hydrogen, thereby regulating the pressure of the long-distance pipeline unit and ultimately converting it into a stable output at the outlet end of the long-distance hydrogen pipeline.

[0123] The embodiment of the present disclosure provides a method for determining the hydrogen storage capacity of a hydrogen production system. The method determines the average hydrogen delivery volume in each time period as the output volume of the hydrogen storage unit by combining the initial hydrogen storage volume initially set with the hydrogen production unit's annual unit time fluctuation production. Then, the long-distance pipeline is simulated and calculated using the average hydrogen delivery volume in each time period. The pressure change curve of the long-distance pipeline under the hydrogen transportation mode can be obtained, and then it is analyzed and judged whether it can pass the pipeline fatigue check to determine whether to adjust the hydrogen storage volume. By continuously simulating and emulating and checking until the final applicable hydrogen storage volume is obtained, the safety risk and investment cost of large-scale hydrogen storage tank configuration of the hydrogen storage unit can be reduced. At the same time, the long-distance pipeline output is carried out with the average hydrogen delivery volume in each time period, so as to achieve small amplitude and low-frequency fluctuations in the pressure of the long-distance pipeline, suppress pipeline fatigue damage, and ensure the service life of the hydrogen pipeline.

[0124] Embodiment 2

[0125] Based on the above embodiments, this embodiment provides a hydrogen production system, such as Fig.13 As shown, it includes: a hydrogen production unit 4, a hydrogen storage unit 5, a long-distance pipeline unit 6 and a control unit 7; the hydrogen production unit 4, the hydrogen storage unit 5 and the long-distance pipeline unit 6 are connected in sequence, and are connected to the control unit 7; the control unit 7 is used to execute the steps of the method described in the above embodiment.

[0126] Further, such as Figure 2 As shown, the hydrogen production system also includes a power generation unit connected to the hydrogen production unit 4 and a power storage unit 3 connected to the power generation unit; the power generation unit includes any one or both of a wind power generation unit 1 and a photovoltaic power generation unit 2; the wind power generation unit 1, the photovoltaic power generation unit 2 and the power storage unit 3 cooperate with the hydrogen production unit 4 to perform wide power capacity adaptation. Specifically, as Figure 2As shown, the power generation unit adopts the wind power generation unit 1 and the photovoltaic power generation unit 2 in a coordinated and complementary manner to generate electricity, realize the continuous output of low-fluctuation electricity with high utilization rate, and configure the power storage unit 3 to promote the further smooth output of electricity. The wind power generation unit 1, the photovoltaic power generation unit 2 and the power storage unit 3 cooperate with the electrolytic hydrogen production unit 4 to adapt the wide power capacity, so as to reduce the random, disordered, high-frequency and large-scale fluctuation output of the hydrogen produced by the hydrogen production unit 4, thereby firstly reducing the volume requirement of the hydrogen storage unit 5 as much as possible from the source.

[0127] In this embodiment, the control unit can be implemented in the form of software, hardware, firmware or any combination thereof, and loaded and executed by a processor in a device such as a mobile phone, a tablet computer, a laptop computer, a desktop computer, a network server, etc. In this embodiment, the control unit is applied to the process of setting the hydrogen storage volume size of the hydrogen storage unit in the hydrogen production system, so as to reasonably set the hydrogen storage volume size that does not affect the life of the pipeline, thereby achieving the effect of reducing the use cost and increasing the service life of the long-distance pipeline.

[0128] Embodiment 3

[0129] Based on the above embodiments, this embodiment provides an electronic device, such as Fig.14 As shown, it includes a memory 21, a processor 22 and a computer program stored in the memory 21, and the processor 22 executes the computer program to implement the steps of the method described in the above embodiment.

[0130] In some implementations of this embodiment, a computer readable storage medium is provided, such as Fig.15 As shown, a computer program 31 is stored thereon, and when the computer program 31 is executed by a processor, the steps of the method described in the above embodiment are implemented.

[0131] In some implementations of this embodiment, a computer program product is provided, including a computer program, which implements the steps of the method described in the above embodiment when executed by a processor.

[0132] The processor may include, but is not limited to, one or more processors or microprocessors. Each processor may be an application specific integrated circuit (ASIC), a digital signal processor (DSP), a digital signal processing device (DSPD), a programmable logic device (PLD), a field programmable gate array (FPGA), a controller, a microcontroller, a microprocessor or other electronic components to execute the method in the above embodiments.

[0133] The computer-readable storage medium may be implemented by any type of volatile or non-volatile storage device or a combination thereof, and the computer-readable storage medium may include but is not limited to, for example, random access memory (RAM), read-only memory (ROM), flash memory, EPROM memory, EEPROM memory, registers, computer storage media (e.g., hard disk, floppy disk, solid-state drive, removable disk, CD-ROM, DVD-ROM, Blu-ray disc, etc.).

[0134] The computer-readable storage medium may also store at least one computer executable program / instruction, which may be, for example, a computer-readable instruction. The computer-readable storage medium includes, but is not limited to, for example, a volatile memory and / or a non-volatile memory. The volatile memory may include, for example, a random access memory (RAM) and / or a cache memory (cache), etc. The computer-readable storage medium may include, for example, a read-only memory (ROM), a hard disk, a flash memory, etc. For example, a non-transitory computer-readable storage medium may be connected to a computing device such as a computer, and then, when the computing device runs the computer-readable instructions stored on the computer-readable storage medium, the various methods described above may be performed.

[0135] In addition, the electronic device may also include (but not limited to) a data bus, an input / output (I / O) bus, a display, and input / output devices (eg, keyboard, mouse, speaker, etc.), etc.

[0136] The processor may communicate with external devices via an I / O bus via a wired or wireless network.

[0137] In one embodiment, the at least one computer executable instruction may also be compiled into or constitute a software product / computer program product, wherein one or more computer executable instructions are executed by a processor to perform the various functions and / or method steps in the embodiments described in the present technology.

[0138] In the embodiments provided in the present disclosure, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely schematic. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architecture, functions and operations of the devices, methods and computer program products according to multiple embodiments of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of a code, and the above-mentioned module, program segment or a part of the code contains one or more executable instructions for implementing the specified logical functions. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, and the combination of boxes in the block diagram and / or flowchart can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0139] It should be noted that in the present disclosure, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element limited by the sentence "includes a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0140] Although the embodiments disclosed in the present disclosure are as above, the above contents are only embodiments adopted for facilitating the understanding of the present disclosure and are not intended to limit the present disclosure. Any technician in the technical field to which the present disclosure belongs can make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed in the present disclosure, but the scope of patent protection of the present disclosure shall still be subject to the scope defined in the attached claims.

Claims

1. A method for determining the hydrogen storage capacity of a hydrogen production system, characterized in that: The hydrogen production system comprises a hydrogen production unit, a hydrogen storage unit and a long-distance pipeline unit connected in sequence; the hydrogen storage volume control method comprises: S1. Obtain the hydrogen production per unit time fluctuation of the hydrogen production unit throughout the year, and set the hydrogen storage capacity of the hydrogen storage unit; S2. Determine the average hydrogen delivery volume output from the hydrogen storage unit to the long-distance pipeline unit in each time period according to the hydrogen production unit's annual unit time fluctuation production and the set hydrogen storage volume; S3, taking the average hydrogen delivery volume in each time period as the boundary condition, simulating and calculating the long-distance pipeline unit to obtain the simulation result; S4, judging whether the simulation result can pass the pipeline fatigue check of the long-distance pipeline unit; If not, the hydrogen storage capacity of the hydrogen storage unit is reset, and steps S2-S4 are repeated until the fatigue check requirements are met, and the final hydrogen storage capacity is determined.

2. A method for determining the hydrogen storage capacity of a hydrogen production system according to claim 1, characterized in that: The simulation calculation of the long-distance pipeline unit to obtain the simulation results includes: Through simulation calculation, the relationship between the pipeline pressure at the most significant fluctuation position of the long-distance pipeline unit and time is obtained; According to the relationship between the pipeline pressure and time, the fluctuation data of the pipeline pressure is determined; the fluctuation data includes at least one of the fluctuation amplitude and the fluctuation frequency.

3. A method for determining the hydrogen storage capacity of a hydrogen production system according to claim 1, characterized in that: Before the step of judging whether the simulation result can pass the pipeline fatigue check of the long-distance pipeline unit, the method further includes: Acquiring pipeline attribute information of the long-distance pipeline unit; According to the pipeline attribute information of the long-distance pipeline unit, the pipeline fatigue crack growth behavior is determined, and then the pressure fluctuation threshold of the pipeline fatigue check of the long-distance pipeline unit is determined.

4. A method for determining the hydrogen storage capacity of a hydrogen production system according to claim 3, characterized in that: The determining whether the simulation result can pass the pipeline fatigue check of the long-distance pipeline unit includes: Using the simulation results as boundary conditions and combining the pressure fluctuation threshold, the pipeline fatigue check of the long-distance pipeline unit is performed; It is determined whether the pressure fluctuation data of the simulation result exceeds the pressure fluctuation threshold of the pipeline fatigue check, and whether the simulation result can pass the pipeline fatigue check of the long-distance pipeline unit is determined based on the judgment result.

5. A method for determining the hydrogen storage capacity of a hydrogen production system according to claim 1, characterized in that: The method of determining the average hydrogen delivery volume outputted from the hydrogen storage unit to the long-distance pipeline unit in each time period according to the hydrogen production unit's annual unit time fluctuation production and the set hydrogen storage volume includes: According to the hydrogen production unit's annual unit time fluctuation production and the set hydrogen storage volume, a judgment condition is established for judging whether the hydrogen production of the hydrogen production unit in any period can be stably input from the hydrogen storage unit to the long-distance pipeline unit at the average hydrogen production of the period; The determination condition is used to divide the hydrogen production per unit time fluctuation of the hydrogen production unit throughout the year into several time periods, so that the hydrogen production fluctuation in each time period can be stably output according to the average hydrogen production in the time period; Based on the division results, the average hydrogen delivery volume outputted from the hydrogen storage unit to the long-distance pipeline unit in each time period is determined.

6. A method for determining the hydrogen storage capacity of a hydrogen production system according to claim 5, characterized in that: The method of using the determination conditions to divide the annual hydrogen production per unit time into a number of time periods, so that the hydrogen production fluctuation in each time period can be stably output according to the average hydrogen production in the time period, includes: The hydrogen production of the hydrogen production unit throughout the year is accumulated starting from the first unit time, and the average hydrogen production in the accumulated time period is simultaneously calculated until the average hydrogen production in the accumulated time period does not meet the judgment condition; Pick up the time period that meets the judgment conditions before the cumulative calculation stops, as well as the hydrogen fluctuation production and average hydrogen production per unit time in the time period; Starting from picking up the next unit time of the time period that meets the judgment conditions, the above steps are repeated until all the hydrogen unit time fluctuation production of the hydrogen production unit throughout the year are traversed to obtain the hydrogen fluctuation production of several time periods.

7. A method for determining the hydrogen storage capacity of a hydrogen production system according to claim 6, characterized in that: The hydrogen production of the hydrogen production unit throughout the year is accumulated starting from the first unit time, and the average hydrogen production in the accumulated time period is simultaneously calculated until the average hydrogen production in the accumulated time period does not meet the judgment condition, including: The hydrogen production of the hydrogen production unit throughout the year is accumulated starting from the first unit time to determine the sum of the hydrogen fluctuation production in the accumulation time period; Calculate the average hydrogen production in this period according to the sum of the hydrogen fluctuation production in the accumulated time period; Determine whether the average hydrogen production during this period meets the determination conditions; If it is in compliance, the cumulative calculation of hydrogen fluctuation production will continue, and the cumulative time period and the average hydrogen production in the time period will be updated; If it does not meet the requirements, the accumulation calculation will be stopped.

8. A hydrogen production system, characterized in that: It comprises a hydrogen production unit, a hydrogen storage unit, a long-distance pipeline unit and a control unit; the hydrogen production unit, the hydrogen storage unit and the long-distance pipeline unit are connected in sequence and are all connected to the control unit; the control unit is used to execute the method described in any one of claims 1-7.

9. An electronic device comprising a memory, a processor and a computer program stored in the memory, characterized in that: The processor executes the computer program to implement 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, the steps of the method according to any one of claims 1 to 7 are implemented.

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