Hydrogen production system and method using abandoned wind and light

Abstract

The application relates to a hydrogen production system and method using abandoned wind and light, comprising a renewable energy system, an energy storage system, an electrolytic cell system, a hydrogen storage system and an oxygen storage system; the renewable energy system comprises a wind turbine generator set and a photovoltaic power generation array, and the output end of the renewable energy system is connected with the energy storage system and the electrolytic cell system; the energy storage system comprises a plurality of energy storage batteries, and the output end of the energy storage system is connected with the electrolytic cell system; the electrolytic cell system comprises a plurality of electrolytic cells; the hydrogen storage system comprises a plurality of hydrogen storage tanks, and the oxygen storage system comprises a plurality of oxygen storage tanks; the number and rated power of the electrolytic cells are determined according to the historical residual power of the renewable energy system. Compared with the prior art, the configuration of the electrolytic cell system is no longer based on the maximum residual power of the renewable energy system, but is set according to a power ladder, is more suitable for the residual power distribution of the renewable energy system, and avoids long-time non-full-power operation of the electrolytic cell system.

Description

Technical Field

[0001] This invention relates to the field of renewable energy applications, and in particular to a hydrogen production system and method utilizing wind and solar power curtailment. Background Technology

[0002] The efficient use of renewable energy is of great significance for achieving energy structure transformation and addressing sustainable energy and environmental development. However, wind power and photovoltaic power generation have problems such as randomness, volatility, and phased provision of operating power. At present, the complementary use of wind and solar energy for water electrolysis to produce hydrogen is the most promising solution for the efficient use of renewable energy.

[0003] Wind turbines capture wind energy through their blades and drive generators to rotate and perform work, thus converting wind energy into mechanical energy into electrical energy. Photovoltaic arrays generate electricity through the photoelectric effect on the photovoltaic panels, thus converting solar energy into electrical energy. Hydrogen electrolyzers use direct current to electrolyze water at membrane electrodes to produce hydrogen when there is surplus output from wind and photovoltaic power generation. The hydrogen is then stored in a hydrogen storage tank for market sale.

[0004] Chinese patent CN113054889A discloses a system for producing hydrogen using curtailed wind and solar power. The electricity generated from these curtailed wind and solar power is stored in an energy storage battery and then electrolyzed in an aluminum electrolysis cell to convert the electricity into liquid aluminum, releasing oxygen. The liquid aluminum is used to prepare aluminum anode plates or aluminum powder. The aluminum anode plates are used in an aluminum-air battery power generation system to produce direct current (DC) electricity and hydrogen, with alumina as a byproduct. The aluminum powder is hydrolyzed, releasing hydrogen and also producing alumina as a byproduct. The hydrogen can be used in fuel cell power generation systems or in hydrogen-powered vehicles or by customers. The alumina byproduct is returned to the aluminum electrolysis cell to further produce liquid aluminum and release oxygen. The electricity generated by the aluminum-air battery power generation system and the hydrogen-oxygen fuel cell power generation system can be directly used for DC and AC loads, or it can be inverted and directly connected to the national power grid. This patent utilizes curtailed wind and solar power to produce hydrogen, improving the absorption capacity of wind and solar power, and is energy-saving and environmentally friendly.

[0005] However, in current hydrogen production systems, in order to withstand the maximum output power of renewable energy, the rated power of the electrolyzer is generally matched with the maximum power of the wind turbine and photovoltaic power generation array. Although this can ensure the full utilization of renewable energy, due to the randomness and volatility of wind and photovoltaic power generation, the electrolyzer is difficult to operate at full load most of the time, resulting in large initial investment and long investment payback period. Summary of the Invention

[0006] The purpose of this invention is to overcome the defects of the prior art and provide a hydrogen production system and method that utilizes wind and solar power curtailment.

[0007] The objective of this invention can be achieved through the following technical solutions:

[0008] A hydrogen production system utilizing curtailed wind and solar power includes a renewable energy system, an energy storage system, an electrolyzer system, a hydrogen storage system, and an oxygen storage system.

[0009] The renewable energy system includes a wind turbine generator set and a photovoltaic power generation array, and the output end of the renewable energy system is connected to an energy storage system and an electrolyzer system.

[0010] The energy storage system includes multiple energy storage batteries, and the output terminal of the energy storage system is connected to the electrolytic cell system.

[0011] The electrolytic cell system includes multiple electrolytic cells;

[0012] The hydrogen storage system includes multiple hydrogen storage tanks, and the oxygen storage system includes multiple oxygen storage tanks.

[0013] The number and rated power of the electrolyzers are determined by the historical surplus output of the renewable energy system, as follows:

[0014] Obtain historical surplus power output data of renewable energy systems, sort each data point in the historical surplus power output data according to the power value, remove outliers, and divide the power ladder according to the sorting results;

[0015] Sort the power steps according to the number of data for each power step, and initialize an empty ideal electrolytic cell scheme;

[0016] Select the power step with the most data, generate a virtual electrolytic cell array based on the ideal electrolytic cell scheme and the power value range of the power step, merge the virtual electrolytic cell array into the ideal electrolytic cell scheme, ignore the power steps of the generated virtual electrolytic cell array, repeat this step to obtain the final ideal electrolytic cell scheme.

[0017] Furthermore, the hydrogen output terminal of the electrolyzer system is connected to a hydrogen main pipe, and each hydrogen storage tank is connected to the hydrogen main pipe via a hydrogen branch pipe. A solenoid valve is installed on the hydrogen branch pipe, and a pressure sensor and a controller are installed on each hydrogen storage tank. The pressure sensor is used to detect the pressure of the hydrogen storage tank, and the controller is connected to the solenoid valve to control its opening and closing. Similarly, the oxygen output terminal of the electrolyzer system is connected to an oxygen main pipe, and each hydrogen storage tank is connected to the oxygen main pipe via an oxygen branch pipe. A solenoid valve is installed on the oxygen branch pipe, and a pressure sensor and a controller are installed on each hydrogen storage tank. The pressure sensor is used to detect the pressure of the hydrogen storage tank, and the controller is connected to the solenoid valve to control its opening and closing.

[0018] Furthermore, outlier removal specifically involves:

[0019] Calculate the mean of the historical remaining power output data, calculate the difference between each data point and the mean, and cluster all data according to the difference to obtain the clustering result. If a data point does not belong to a cluster, or the distance between a data point and the nearest cluster is greater than a preset range threshold, or the cluster to which the data point belongs is a sparse cluster, then the data point is an outlier.

[0020] Furthermore, the power ladder is divided according to the ranking results as follows:

[0021] Based on the clustering results, multiple data points in the same cluster are treated as a power ladder, and the number of data points in the power ladder and the power value of each data point in the power ladder are determined.

[0022] Furthermore, the generation of the virtual electrolytic cell array specifically involves:

[0023] Obtain the ideal electrolytic cell scheme, determine the rated power of each electrolytic cell in the ideal electrolytic cell scheme, and calculate the maximum power requirement of the ideal electrolytic cell scheme;

[0024] Obtain the power value range of the power step. If the maximum power requirement of the ideal electrolytic cell scheme is greater than the power value range, the generated virtual electrolytic cell array is empty. Otherwise, generate the virtual electrolytic cell array based on the difference between the power value range and the maximum power requirement of the ideal electrolytic cell scheme.

[0025] Furthermore, the power value range of the power ladder is the mode of the power values ​​of multiple data points in the power ladder.

[0026] Furthermore, before incorporating the virtual electrolyzer array into the ideal electrolyzer scheme, the following steps are also included:

[0027] The newly generated virtual electrolytic cell array is merged into the ideal electrolytic cell scheme to obtain the assumed electrolytic cell scheme. The cost-benefit value of the assumed electrolytic cell scheme is calculated based on the historical remaining power output data. If the cost-benefit value of the assumed electrolytic cell scheme does not meet the preset investment constraints, the virtual electrolytic cell array is not merged.

[0028] Furthermore, after obtaining the final ideal electrolytic cell design, the following are also included:

[0029] The capacity of the energy storage system is calculated based on the maximum power requirement of the final ideal electrolyzer scheme and historical remaining power output data.

[0030] A method for producing hydrogen using wind and solar power curtailment, based on the aforementioned hydrogen production system, includes the following steps:

[0031] Obtain the remaining power value of the renewable energy system, obtain the power ladder corresponding to the remaining power value, obtain the electrolyzer scheduling scheme of the power ladder, and execute the scheduling.

[0032] Furthermore, it also includes obtaining the power of the energy storage system; if the power of the energy storage system is higher than a preset power threshold, the energy storage system is merged with the renewable energy system to obtain the remaining power value; the power ladder corresponding to the remaining power value is obtained; and the electrolyzer scheduling scheme of the power ladder is obtained and the scheduling is executed.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] (1) The configuration of the electrolytic cell system is no longer based on the maximum remaining power of the renewable energy system, but is set according to the division of power steps, which is more in line with the distribution of the remaining power of the renewable energy system and avoids the electrolytic cell system from not being able to operate at full power for a long time.

[0035] (2) Introducing cost-benefit value and investment constraints into the design of the electrolytic cell scheme ensures that the initial investment and investment return period of the electrolytic cell system meet the requirements. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of a hydrogen production system. Detailed Implementation

[0037] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. These embodiments are based on the technical solution of the present invention and provide detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments.

[0038] Example 1:

[0039] A hydrogen production system that utilizes wind and solar power curtailment, such as Figure 1 As shown, it includes a renewable energy system, an energy storage system, an electrolyzer system, a hydrogen storage system, and an oxygen storage system. The renewable energy system includes wind turbine generators and photovoltaic power generation arrays, and the output of the renewable energy system is connected to the energy storage system and the electrolyzer system. The energy storage system includes multiple energy storage batteries, and the output of the energy storage system is connected to the electrolyzer system. The electrolyzer system includes multiple electrolyzers. The hydrogen storage system includes multiple hydrogen storage tanks, and the oxygen storage system includes multiple oxygen storage tanks.

[0040] The renewable energy system utilizes electricity generated from curtailed wind and solar power. This electricity can be stored in an energy storage system or directly fed into an electrolyzer system, connected to the electrodes or electrical equipment (such as air compressors) of the electrolyzer. The energy storage system mitigates the volatility of the renewable energy system by storing excess energy and directly supplying power to the electrolyzer system, connected to its electrodes or electrical equipment (such as air compressors). The hydrogen and oxygen storage systems store the hydrogen and oxygen produced by the electrolyzer system. Additionally, there are converters for DC / AC conversion, transformers for voltage conversion, and electrical equipment for hydrogen and oxygen filtration and drying, which will not be elaborated upon here; those skilled in the art can understand their configuration based on conventional methods.

[0041] The hydrogen output of the electrolyzer system is connected to the hydrogen main pipe. Each hydrogen storage tank is connected to the hydrogen main pipe via a hydrogen branch pipe, which is equipped with a solenoid valve. Each hydrogen storage tank is equipped with a pressure sensor and a controller. The pressure sensor detects the pressure in the storage tank, and the controller is connected to the solenoid valve to control its opening and closing, facilitating hydrogen storage. Similarly, the oxygen output of the electrolyzer system is connected to the oxygen main pipe. Each hydrogen storage tank is connected to the oxygen main pipe via an oxygen branch pipe, which is equipped with a solenoid valve. Each hydrogen storage tank is equipped with a pressure sensor and a controller. The pressure sensor detects the pressure in the storage tank, and the controller is connected to the solenoid valve to control its opening and closing, facilitating oxygen storage.

[0042] When setting up an electrolytic cell system, if the system is matched to the maximum output power of the renewable energy system, it is obvious that the system will struggle to operate at full capacity in most cases, thus increasing investment costs and extending the payback period. Therefore, this application adjusts the setup of the electrolytic cell system as follows:

[0043] (1) Obtain historical surplus power output data of renewable energy systems, sort each data in the historical surplus power output data according to the power value, remove outliers, and divide the power ladder according to the sorting results;

[0044] Historical surplus power output data of renewable energy systems represents the electricity generated by renewable energy systems using curtailed wind and solar power over a period of time. On the one hand, daily historical surplus power output data is affected by wind speed and irradiance; on the other hand, daily historical surplus power output data is also affected by the demand-side load of the power grid. Therefore, it is necessary to obtain historical surplus power output data of a region in order to analyze the trend and numerical distribution of its renewable energy system's use of curtailed wind and solar power. For example, the daily surplus power value of the region under study over the past two years can be obtained.

[0045] After obtaining the historical residual power output data, in order to analyze the residual power values in the area to be studied, first sort each data in the historical residual power output data according to the power value, and then eliminate the outliers.

[0046] In this embodiment, the specific method for eliminating outliers is as follows: calculate the mean value of the historical residual power output data, calculate the difference between each data and the mean value, and cluster all the data according to the difference to obtain a clustering result. If a data does not belong to a cluster, or the distance between a data and the nearest cluster is greater than a preset range threshold, or the cluster to which the data belongs is a sparse cluster, then this data is an outlier. In other embodiments, outliers can also be eliminated manually, or other statistical-based methods can be used to eliminate outliers.

[0047] After the operation of eliminating outliers, power generation scenarios with fewer occurrences can be removed. For example, if there is an outlier with a very large value in the historical residual power output data, after analysis, it is found that the reason is that the power grid failed on this date in history, resulting in the renewable energy system not being connected to the grid, so the residual power value generated is relatively large. Another example is that if there is an outlier with a very small value in the historical residual power output data, after analysis, it is found that the reason is that the system was repaired on this date in history, and the wind turbines and photovoltaic arrays were overhauled, resulting in less power generation.

[0048] After eliminating outliers, the distribution trend of the remaining data can be analyzed. For example, by observing the sorting result, it is found that the residual power values of N1 data fall in the interval P1 - P2, the residual power values of N2 data fall in the interval P2 - P3, the residual power values of N3 data fall in the interval P3 - P4... P1 < P2 < P3 < P4... In this way, the N1 data falling in the interval P1 - P2 can be divided into a power step, the N2 data falling in the interval P2 - P3 can be divided into a power step, the N3 data falling in the interval P3 - P4 can be divided into a power step... Thus, the division of power steps is completed.

[0049] In this embodiment, the power steps are divided by borrowing the clustering result obtained from the operation of eliminating outliers. Specifically, according to the clustering result, multiple data in the same cluster are used as a power step, and the number of data in the power step and the power values of each data in the power step are determined.

[0050] (2) Sort the power steps according to the number of data in each power step, and initialize an ideal electrolyzer scheme that is empty; select the power step with the largest number of data, generate a virtual electrolyzer array based on the ideal electrolyzer scheme and the power value interval of this power step, and merge the virtual electrolyzer array into the ideal electrolyzer scheme. Ignore the power steps for which the virtual electrolyzer arrays have been generated, and repeat this step to obtain the final ideal electrolyzer scheme.

[0051] Taking the three power steps in the above text as an example, after analysis, it is found that N2 > N1 > N3. Therefore, the occurrence probability and distribution range of the power step in the P2 - P3 interval are the largest. So, a virtual electrolytic cell array in the P2 - P3 interval of the power step is generated first.

[0052] Here, the mode of the power values of multiple data in the power step can be used as the power value interval of the power step because the mode appears the most times and can better represent multiple data in the power step. Of course, according to needs, the mean, maximum value, minimum value, etc. of the power values of multiple data in the power step can also be used as the power value interval of the power step.

[0053] After determining the value of the power value interval of the power step, since the ideal electrolytic cell scheme is empty at this time, a virtual electrolytic cell array can be generated according to the existing electrolytic cell planning scheme, so that the number and rated power of the electrolytic cells in the virtual electrolytic cell array match the power value interval, that is, the power required when the virtual electrolytic cell array operates at full power is the power value interval. Then the generated virtual electrolytic cell array is merged into the ideal electrolytic cell scheme to complete one update of the ideal electrolytic cell scheme.

[0054] Continuing the analysis, for the power step in the P1 - P2 interval, since P1 < P2 < P3 < P4, the virtual electrolytic cell array that can satisfy the power step in the P2 - P3 interval must be able to satisfy the power step in the P1 - P2 interval. Therefore, the generated virtual electrolytic cell array is empty.

[0055] Continuing the analysis, for the power step in the P3 - P4 interval, the existing ideal electrolytic cell scheme cannot satisfy it. So, a virtual electrolytic cell array needs to be generated continuously. Therefore, a virtual electrolytic cell array is generated according to the difference between the power value interval and the maximum power demand of the ideal electrolytic cell scheme. Then the generated virtual electrolytic cell array is merged into the ideal electrolytic cell scheme to complete one update of the ideal electrolytic cell scheme.

[0056] After sequential analysis, the final ideal electrolytic cell scheme is obtained.

[0057] In this application, the configuration of the electrolytic cell system is no longer based on the maximum surplus power of the renewable energy system, but is set according to the divided power steps, which is more in line with the distribution of the surplus power of the renewable energy system.

[0058] Furthermore, before merging the virtual electrolytic cell array into the ideal electrolytic cell scheme, it further includes:

[0059] The newly generated virtual electrolytic cell array is merged into the ideal electrolytic cell scheme to obtain the assumed electrolytic cell scheme. The cost-benefit value of the assumed electrolytic cell scheme is calculated based on the historical remaining power output data. If the cost-benefit value of the assumed electrolytic cell scheme does not meet the preset investment constraints, the virtual electrolytic cell array is not merged.

[0060] The cost-benefit ratio can take into account the equipment cost, maintenance cost, and operating cost of the electrolyzer, as well as the equipment recovery revenue, hydrogen revenue, oxygen revenue, and waste electricity revenue. Investment constraints can include the maximum limit of total investment and the investment payback period. This part consists of commonly used calculation and evaluation indicators for power plants, such as Chinese patent CN115001150A, which will not be elaborated here, as those skilled in the art will understand.

[0061] Considering cost-benefit analysis and investment constraints, virtual electrolyzer arrays with limited data sets and wide power value ranges may not be included in the ideal electrolyzer scheme. For example, for the power step range P4 to P5, the data set N4 is relatively small. Therefore, after generating the virtual electrolyzer array and calculating the cost-benefit analysis using historical remaining power output data, it was found that the investment payback period is long and does not meet the investment constraints. Therefore, this virtual electrolyzer array is discarded. The analysis continues for the next power step.

[0062] Of course, when the surplus power of the renewable energy system is large, if the final ideal electrolyzer scheme cannot meet the requirements, an energy storage system is needed to store the electrical energy. Therefore, obtaining the final ideal electrolyzer scheme also includes: calculating the capacity of the energy storage system based on the maximum power requirement of the final ideal electrolyzer scheme and historical surplus power output data.

[0063] This application also provides a method for producing hydrogen using wind and solar power curtailment, comprising the following steps:

[0064] The remaining power value of the renewable energy system is obtained, the corresponding power tier is obtained, and the electrolyzer scheduling scheme for the power tier is obtained and executed. Here, the electrolyzer scheduling scheme can be pre-set for each power tier, or the virtual electrolyzer array generated for each power tier during electrolyzer configuration can be used as the basis to obtain the electrolyzer scheduling scheme. For example, for the power tier in the P2 to P3 range, its electrolyzer scheduling scheme is the generated virtual electrolyzer array. For the power tier in the P1 to P2 range, its generated virtual electrolyzer array is empty, so a satisfactory electrolyzer scheduling scheme is generated according to the ideal electrolyzer scheme. For the power tier in the P3 to P4 range, its generated virtual electrolyzer array is obtained based on the difference between the power value range and the maximum power demand of the ideal electrolyzer scheme. Therefore, its electrolyzer scheduling scheme is obtained based on the ideal electrolyzer scheme + virtual electrolyzer array.

[0065] In addition, in order to ensure that the energy storage system can dissipate the electrical energy other than that produced by electrolysis hydrogen, it is necessary to keep the capacity of the energy storage system from being too high. Therefore, it is also necessary to obtain the power of the energy storage system. If the power of the energy storage system is higher than the preset power threshold, the energy storage system is merged with the renewable energy system to obtain the remaining power value, obtain the power ladder corresponding to the remaining power value, obtain the electrolyzer scheduling scheme of the power ladder and execute the scheduling, thereby keeping the power of the energy storage system from being too high.

[0066] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A hydrogen production system utilizing wind and solar power curtailment, characterized in that, This includes renewable energy systems, energy storage systems, electrolyzer systems, hydrogen storage systems, and oxygen storage systems; The renewable energy system includes a wind turbine generator set and a photovoltaic power generation array, and the output end of the renewable energy system is connected to an energy storage system and an electrolyzer system. The energy storage system includes multiple energy storage batteries, and the output terminal of the energy storage system is connected to the electrolytic cell system. The electrolytic cell system includes multiple electrolytic cells; The hydrogen storage system includes multiple hydrogen storage tanks, and the oxygen storage system includes multiple oxygen storage tanks. The number and rated power of the electrolyzers are determined by the historical surplus output of the renewable energy system, as follows: Obtain historical surplus power output data of renewable energy systems, sort each data point in the historical surplus power output data according to the power value, remove outliers, and divide the power ladder according to the sorting results; Sort the power steps according to the number of data for each power step, and initialize an empty ideal electrolytic cell scheme; Select the power step with the most data, generate a virtual electrolytic cell array based on the ideal electrolytic cell scheme and the power value range of the power step, merge the virtual electrolytic cell array into the ideal electrolytic cell scheme, ignore the power steps of the generated virtual electrolytic cell array, repeat this step to obtain the final ideal electrolytic cell scheme.

2. A hydrogen production system utilizing wind and solar power curtailment according to claim 1, characterized in that, The hydrogen output terminal of the electrolyzer system is connected to a hydrogen main pipe. Each hydrogen storage tank is connected to the hydrogen main pipe via a hydrogen branch pipe, which is equipped with a solenoid valve. Each hydrogen storage tank is equipped with a pressure sensor and a controller. The pressure sensor is used to detect the pressure in the hydrogen storage tank, and the controller is connected to the solenoid valve to control its opening and closing. The oxygen output terminal of the electrolyzer system is connected to an oxygen main pipe. Each hydrogen storage tank is connected to the oxygen main pipe via an oxygen branch pipe, which is equipped with a solenoid valve. Each hydrogen storage tank is equipped with a pressure sensor and a controller. The pressure sensor is used to detect the pressure in the hydrogen storage tank, and the controller is connected to the solenoid valve to control its opening and closing.

3. A hydrogen production system utilizing wind and solar power curtailment as described in claim 1, characterized in that, The specific steps for removing outliers are: Calculate the mean of the historical remaining power output data, calculate the difference between each data point and the mean, and cluster all data according to the difference to obtain the clustering result. If a data point does not belong to a cluster, or the distance between a data point and the nearest cluster is greater than a preset range threshold, or the cluster to which the data point belongs is a sparse cluster, then the data point is an outlier.

4. A hydrogen production system utilizing wind and solar power curtailment according to claim 3, characterized in that, The power ladder is divided according to the sorting results as follows: Based on the clustering results, multiple data points in the same cluster are treated as a power ladder, and the number of data points in the power ladder and the power value of each data point in the power ladder are determined.

5. A hydrogen production system utilizing wind and solar power curtailment according to claim 4, characterized in that, The specific steps for generating a virtual electrolytic cell array are as follows: Obtain the ideal electrolytic cell scheme, determine the rated power of each electrolytic cell in the ideal electrolytic cell scheme, and calculate the maximum power requirement of the ideal electrolytic cell scheme; Obtain the power value range of the power step. If the maximum power requirement of the ideal electrolytic cell scheme is greater than the power value range, the generated virtual electrolytic cell array is empty. Otherwise, generate the virtual electrolytic cell array based on the difference between the power value range and the maximum power requirement of the ideal electrolytic cell scheme.

6. A hydrogen production system utilizing wind and solar power curtailment according to claim 5, characterized in that, The power value range of the power ladder is the mode of the power values ​​of multiple data points in the power ladder.

7. A hydrogen production system utilizing wind and solar power curtailment according to claim 5, characterized in that, Before incorporating the virtual electrolyzer array into the ideal electrolyzer scheme, the following steps are also included: The newly generated virtual electrolytic cell array is merged into the ideal electrolytic cell scheme to obtain the assumed electrolytic cell scheme. The cost-benefit value of the assumed electrolytic cell scheme is calculated based on the historical remaining power output data. If the cost-benefit value of the assumed electrolytic cell scheme does not meet the preset investment constraints, the virtual electrolytic cell array is not merged.

8. A hydrogen production system utilizing wind and solar power curtailment according to claim 5, characterized in that, After obtaining the final ideal electrolyzer design, the following steps are also included: The capacity of the energy storage system is calculated based on the maximum power requirement of the final ideal electrolyzer scheme and historical remaining power output data.

9. A method for producing hydrogen using wind and solar power curtailment, characterized in that, Based on the hydrogen production system according to any one of claims 1-8, the system includes the following steps: Obtain the remaining power value of the renewable energy system, obtain the power ladder corresponding to the remaining power value, obtain the electrolyzer scheduling scheme of the power ladder, and execute the scheduling.

10. A method for producing hydrogen using wind and solar power curtailment according to claim 9, characterized in that, It also includes obtaining the power of the energy storage system; if the power of the energy storage system is higher than a preset power threshold, the energy storage system is merged with the renewable energy system to obtain the remaining power value; the power ladder corresponding to the remaining power value is obtained; and the electrolyzer scheduling scheme of the power ladder is obtained and the scheduling is executed.

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