Model selection recommendation method and device for photovoltaic power generation equipment in water electrolysis hydrogen production system

Abstract

The invention provides a photovoltaic power generation equipment type selection recommendation method and device in a water electrolysis hydrogen production system. The method comprises the following steps: acquiring a plurality of candidate equipment type selection combinations of photovoltaic power generation equipment; performing photovoltaic power generation analogue simulation on each type based on the meteorological data information to determine an annual hourly output power value; according to the maximum hydrogen production power and the minimum cut-in power of the water electrolysis hydrogen production system, the annual hourly output power value is corrected, an annual hourly effective hydrogen production power value is obtained, and the annual hydrogen production amount of each combination is calculated by combining the hydrogen production power consumption of the water electrolysis hydrogen production system; based on the construction cost and the annual operation cost of the photovoltaic power station corresponding to each combination, and the project site unit hydrogen price and the annual hydrogen production amount corresponding to the water electrolysis hydrogen production system, determining an evaluation index corresponding to each candidate equipment type selection combination, and selecting a target type selection equipment combination meeting a preset type selection condition, the photovoltaic power generation curve can be matched with the hydrogen production system, and the overall energy efficiency of the photovoltaic hydrogen production system is improved.

Description

Technical Field

[0001] This application relates to the field of hydrogen production, and more specifically, to a method and apparatus for recommending the selection of photovoltaic power generation equipment in a water electrolysis hydrogen production system. Background Technology

[0002] In photovoltaic water electrolysis for hydrogen production, the selection of photovoltaic power generation equipment is necessary to match the power output of the water electrolysis equipment. Currently, the selection of photovoltaic-side equipment typically employs the following two conventional approaches.

[0003] Firstly, there is the simple capacity matching method. This method typically involves configuring a photovoltaic array with a nominal capacity that matches the electrolyzer. For example, a 1MW electrolyzer is paired with a photovoltaic power station with a capacity of approximately 1.2MWp. This method represents a crude capacity matching approach, completely ignoring the characteristics of the photovoltaic power generation curve.

[0004] Secondly, there's the optimal power generation method. This method selects equipment based on maximizing the annual power generation or minimizing the cost per kilowatt-hour of a photovoltaic power plant. However, it prioritizes generating as much total electricity as possible, rather than producing as much hydrogen as possible. A photovoltaic system with the highest power generation capacity may not have the most suitable power generation curve for hydrogen production. Summary of the Invention

[0005] In view of this, the purpose of this application is to provide a method and apparatus for recommending photovoltaic power generation equipment in a water electrolysis hydrogen production system, which can adapt the photovoltaic power generation curve to the hydrogen production system and improve the overall energy efficiency of the photovoltaic hydrogen production system.

[0006] This application provides a method for selecting and recommending photovoltaic power generation equipment in a water electrolysis hydrogen production system, the method comprising: Multiple candidate equipment selection combinations for photovoltaic power generation equipment are obtained; different equipment selection combinations involve different equipment; the equipment in the candidate equipment selection combinations includes: photovoltaic modules, brackets, and inverters; Photovoltaic power generation simulations were performed on each candidate equipment combination based on meteorological data to determine the hourly output power value of each candidate equipment combination throughout the year; the hourly output power value throughout the year includes the power output value of the candidate equipment combination for each hour throughout the year. Based on the maximum hydrogen production power and minimum cut-in power of the water electrolysis hydrogen production system, the annual hourly output power value is corrected to obtain the annual hourly effective hydrogen production power value for each candidate equipment selection combination. Based on the hourly effective hydrogen production power value throughout the year and the hydrogen production power consumption of the water electrolysis hydrogen production system, calculate the annual hydrogen production of each candidate equipment combination. Based on the construction cost and annual operating cost of the photovoltaic power plant corresponding to each candidate equipment selection combination, as well as the unit hydrogen price at the project site and the annual hydrogen production volume corresponding to the water electrolysis hydrogen production system, the evaluation indicators corresponding to each candidate equipment selection combination are determined. Compare the evaluation indicators corresponding to each candidate equipment selection combination, and determine the target equipment selection combination that meets the preset selection conditions from the candidate equipment selection combinations based on the comparison results.

[0007] In some embodiments, the method for recommending photovoltaic power generation equipment in the water electrolysis hydrogen production system includes obtaining multiple candidate equipment selection combinations for photovoltaic power generation equipment, which includes: Obtain the equipment model file suitable for equipment selection in a water electrolysis hydrogen production system; different equipment selections for the same type of equipment correspond to different parameters in the equipment model file. By combining different types of equipment, multiple candidate equipment selection combinations can be obtained.

[0008] In some embodiments, the photovoltaic power generation equipment selection recommendation method in the water electrolysis hydrogen production system includes, as a step, performing photovoltaic power generation simulation on each candidate equipment selection combination based on meteorological data information to determine the hourly output power value of each candidate equipment selection combination throughout the year, comprising: For each candidate equipment selection combination, the equipment combination information and equipment model file of that candidate equipment selection combination are input into the simulation model; the equipment combination information represents the configuration parameters determined by the candidate equipment selection combination; By processing meteorological data, equipment combination information, and equipment model files of the candidate equipment selection combination using the simulation model, the hourly output power value of the candidate equipment selection combination throughout the year is determined.

[0009] In some embodiments, the method for recommending photovoltaic power generation equipment in the water electrolysis hydrogen production system, wherein the step of processing meteorological data, equipment combination information of the candidate equipment combination, and equipment model files through the simulation model to determine the annual hourly output power value of the candidate equipment combination includes: The simulation model processes meteorological data, equipment combination information and equipment model files of the candidate equipment selection combination, as well as the annual hourly array voltage and annual hourly array current corresponding to the candidate equipment selection combination. Based on the annual hourly array voltage and annual hourly array current corresponding to the candidate equipment selection combination, the annual hourly output power value of the candidate equipment selection combination is determined.

[0010] In some embodiments, the method for recommending photovoltaic power generation equipment in the water electrolysis hydrogen production system, wherein the step of processing meteorological data, equipment combination information of the candidate equipment combination, and equipment model files through the simulation model to determine the annual hourly output power value of the candidate equipment combination includes: Multiple meteorological data information of the project site corresponding to the water electrolysis hydrogen production system are obtained based on multiple meteorological data sources; The simulation model processes various meteorological data, equipment combination information and equipment model files of the candidate equipment selection combination to determine various annual hourly output power reference values ​​for the candidate equipment selection combination. By integrating various annual hourly output power reference values ​​for this candidate equipment selection combination, the annual hourly output power value of this candidate equipment selection combination is determined.

[0011] In some embodiments, the method for recommending photovoltaic power generation equipment in the water electrolysis hydrogen production system includes correcting the hourly output power value throughout the year based on the maximum hydrogen production power and minimum cut-in power of the water electrolysis hydrogen production system, which includes: Correct the data points of the hourly output power value throughout the year that are lower than the minimum cut-in power to zero; Data points in the hourly output power data that are higher than the maximum hydrogen production power are corrected to the maximum hydrogen production power value.

[0012] In some embodiments, the method for recommending photovoltaic power generation equipment in the water electrolysis hydrogen production system includes calculating the annual hydrogen production capacity for each candidate equipment combination based on the annual hourly effective hydrogen production power value and the hydrogen production power consumption of the water electrolysis hydrogen production system. Based on the hourly effective hydrogen production power values ​​throughout the year, calculate the total effective hydrogen production power values ​​for the whole year; The ratio of the total effective hydrogen production power value for the whole year to the hydrogen production power consumption of the water electrolysis hydrogen production system is determined as the annual hydrogen production capacity of the candidate equipment selection combination.

[0013] In some embodiments, in the method for selecting and recommending photovoltaic power generation equipment in the water electrolysis hydrogen production system, the evaluation indicators... ; Among them, the The annual hydrogen production capacity of the i-th candidate equipment combination is represented by P, and P represents the unit hydrogen price at the project site corresponding to the water electrolysis hydrogen production system; The sum of the annual depreciation construction cost and the annual operating cost of the photovoltaic power plant corresponding to the i-th group of candidate equipment selection combinations is described. I Characterization and evaluation indicators.

[0014] In some embodiments, the photovoltaic power generation equipment selection recommendation method in the water electrolysis hydrogen production system includes comparing the evaluation indicators corresponding to each candidate equipment selection combination, and determining the target equipment selection combination that meets the preset selection conditions from the candidate equipment selection combinations based on the comparison results, including: Sort the evaluation indicators from high to low; Select the target equipment combination corresponding to the preset number of evaluation indicators that are ranked first. In some embodiments, a photovoltaic power generation equipment selection recommendation device is also provided in a water electrolysis hydrogen production system, the device comprising: The acquisition module is used to acquire multiple candidate equipment selection combinations for photovoltaic power generation equipment; the equipment selections in different candidate equipment selection combinations are different; the equipment in the candidate equipment selection combinations include: photovoltaic modules, brackets, and inverters; The first determining module is used to perform photovoltaic power generation simulation on each candidate equipment selection combination based on meteorological data information, and determine the annual hourly output power value of each candidate equipment selection combination; the annual hourly output power value includes the power value output by the candidate equipment selection combination every hour. The correction module is used to correct the hourly output power value throughout the year based on the maximum hydrogen production power and the minimum cut-in power of the water electrolysis hydrogen production system, so as to obtain the effective hourly hydrogen production power value throughout the year for each candidate equipment selection combination. The calculation module is used to calculate the annual hydrogen production of each candidate equipment combination based on the annual hourly effective hydrogen production power value and the hydrogen production power consumption of the water electrolysis hydrogen production system. The second determining module is used to determine the evaluation index corresponding to each candidate equipment selection combination based on the construction cost and annual operating cost of the photovoltaic power station corresponding to each candidate equipment selection combination, as well as the unit hydrogen price at the project site and the annual hydrogen production volume corresponding to the water electrolysis hydrogen production system. The third determination module is used to compare the evaluation indicators corresponding to each candidate equipment selection combination, and determine the target selection equipment combination that meets the preset selection conditions from the candidate equipment selection combinations based on the comparison results.

[0015] This application provides a method and apparatus for selecting and recommending photovoltaic power generation equipment in a water electrolysis hydrogen production system. The method involves obtaining multiple candidate equipment selection combinations for photovoltaic power generation equipment. Different equipment selection combinations include different equipment components. The equipment in each candidate equipment selection combination includes photovoltaic modules, brackets, and inverters. Photovoltaic power generation simulation is performed on each candidate equipment selection combination based on meteorological data to determine the annual hourly output power value for each combination. The annual hourly output power value includes the power output of that candidate equipment selection combination for each hour throughout the year. The annual hourly output power value is corrected based on the maximum hydrogen production power and minimum cut-in power of the water electrolysis hydrogen production system to obtain the annual hourly effective hydrogen production power value for each candidate equipment selection combination. Based on the annual hourly effective hydrogen production power value and the hydrogen production power consumption of the water electrolysis hydrogen production system, the annual hydrogen production volume of each candidate equipment selection combination is calculated. Finally, based on the corresponding annual hourly effective hydrogen production power value and the annual power consumption of the water electrolysis hydrogen production system, the annual hydrogen production volume of each candidate equipment selection combination is calculated. The construction cost and annual operating cost of the photovoltaic power station, as well as the unit hydrogen price and annual hydrogen production volume at the project site corresponding to the water electrolysis hydrogen production system, are used to determine the evaluation indicators for each candidate equipment selection combination. The evaluation indicators for each candidate equipment selection combination are compared, and based on the comparison results, the target equipment selection combination that meets the preset selection conditions is determined from the candidate equipment selection combinations. The method uses the cut-in power and rated power of the electrolyzer as core constraints to correct the photovoltaic simulation results, accurately calculating the "effective hydrogen production power" and "effective hydrogen production volume," so that the output curve of the photovoltaic system better matches the operating range of the electrolyzer. This significantly reduces energy waste caused by insufficient power preventing startup and forced curtailment due to excessive power, improving the comprehensive utilization efficiency of solar energy and the total annual hydrogen production. The method also selects the equipment combination scheme with the best economic efficiency throughout its entire life cycle, avoiding situations where power generation is high but revenue is low. Thus, the selection scheme combines technological advancement with economic rationality. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A flowchart illustrating the method for selecting and recommending photovoltaic power generation equipment in the water electrolysis hydrogen production system described in this application embodiment is shown. Figure 2 A flowchart illustrating the method for obtaining multiple candidate equipment selection combinations for photovoltaic power generation equipment according to an embodiment of this application is shown. Figure 3A flowchart of the method for determining the hourly output power value of each candidate device selection combination throughout the year, as described in an embodiment of this application, is shown. Figure 4 A flowchart of the method for correcting the hourly output power value throughout the year, as described in an embodiment of this application, is shown. Figure 5 A flowchart illustrating the method for calculating the annual hydrogen production for each candidate equipment combination according to an embodiment of this application is shown. Figure 6 The simulation results of the array voltage and array current of the i-th group of candidate device selection combinations described in the embodiments of this application are shown; Figure 7 This paper shows partial simulation data of the i-th group of candidate equipment selection combinations described in the embodiments of this application; Figure 8 This document shows partial power generation data for the i-th group of candidate equipment combinations described in an embodiment of this application. Figure 9 A schematic diagram of the photovoltaic power generation equipment selection recommendation device in the water electrolysis hydrogen production system described in this application embodiment is shown. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. It should be understood that the accompanying drawings in this application are for illustrative and descriptive purposes only and are not intended to limit the scope of protection of this application. Furthermore, it should be understood that the schematic drawings are not drawn to scale. The flowcharts used in this application illustrate operations implemented according to some embodiments of this application. It should be understood that the operations in the flowcharts may not be implemented in sequence, and steps without logical contextual relationships may be reversed or implemented simultaneously. In addition, those skilled in the art, guided by the content of this application, may add one or more other operations to the flowcharts, or remove one or more operations from the flowcharts.

[0019] Furthermore, the described embodiments are merely some, not all, of the embodiments of this application. The components of the embodiments of this application described and illustrated herein can typically be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0020] It should be noted that the term "comprising" will be used in the embodiments of this application to indicate the presence of the features declared thereafter, but does not exclude the addition of other features.

[0021] In photovoltaic water electrolysis for hydrogen production, the selection of photovoltaic power generation equipment is necessary to match the power output of the water electrolysis equipment. Currently, the selection of photovoltaic-side equipment typically employs the following two conventional approaches.

[0022] Firstly, there is the simple capacity matching method. This method typically involves configuring a photovoltaic array with a nominal capacity that matches the electrolyzer. For example, a 1MW electrolyzer is paired with a photovoltaic power station with a capacity of approximately 1.2MWp. This method represents a crude capacity matching approach, completely ignoring the characteristics of the photovoltaic power generation curve.

[0023] Secondly, there's the optimal power generation method. This method selects equipment based on maximizing the annual power generation or minimizing the cost per kilowatt-hour of a photovoltaic power plant. However, it prioritizes generating as much total electricity as possible, rather than producing as much hydrogen as possible. A photovoltaic system with the highest power generation capacity may not have the most suitable power generation curve for hydrogen production.

[0024] Specifically, the mismatch between the volatility of photovoltaic (PV) power generation curves and hydrogen production systems is as follows: In the early morning, evening, or on cloudy days, the output of the PV system may consistently be lower than the electrolyzer's cut-in power, resulting in complete waste of this electricity and low system utilization. At midday with ample sunshine, the PV output may far exceed the electrolyzer's rated power, leading to peak shaving and wasted electricity, similarly reducing the system's effective energy utilization. Therefore, if a simple capacity matching method or optimal power generation is used for selection, and the low-power output of the PV equipment cannot reach the electrolyzer's start-up threshold, it will contribute nothing to hydrogen production; or if its capacity ratio is designed too high, the midday "curtailment" phenomenon will be more severe, resulting in a large amount of excess electricity that cannot be effectively utilized by the hydrogen production system, instead increasing ineffective investment costs.

[0025] Based on this, this application provides a method and apparatus for recommending photovoltaic power generation equipment in a water electrolysis hydrogen production system, obtaining multiple candidate equipment selection combinations for photovoltaic power generation equipment; different equipment selections are included in different candidate equipment selection combinations; the equipment in the candidate equipment selection combinations includes: photovoltaic modules, brackets, and inverters; photovoltaic power generation simulation is performed on each candidate equipment selection combination based on meteorological data information to determine the annual hourly output power value of each candidate equipment selection combination; the annual hourly output power value includes the power output value of the candidate equipment selection combination for each hour throughout the year; the annual hourly output power value is corrected according to the maximum hydrogen production power and minimum cut-in power of the water electrolysis hydrogen production system to obtain the annual hourly effective hydrogen production power value of each candidate equipment selection combination; based on the annual hourly effective hydrogen production power value and the hydrogen production power consumption of the water electrolysis hydrogen production system, the annual hydrogen production of each candidate equipment selection combination is calculated; based on each candidate equipment selection combination... The method determines the evaluation indicators for each candidate equipment selection combination based on the construction cost and annual operating cost of the corresponding photovoltaic power station, the unit hydrogen price at the project site corresponding to the water electrolysis hydrogen production system, and the annual hydrogen production volume. It compares the evaluation indicators for each candidate equipment selection combination and, based on the comparison results, determines the target equipment selection combination that meets the preset selection conditions from the candidate equipment selection combinations. The method uses the cut-in power and rated power of the electrolyzer as core constraints to correct the photovoltaic simulation results, accurately calculating the "effective hydrogen production power" and "effective hydrogen production volume," so that the output curve of the photovoltaic system better matches the operating range of the electrolyzer. This significantly reduces energy waste caused by insufficient power preventing startup and forced curtailment due to excessive power, improving the comprehensive utilization efficiency of solar energy and the total annual hydrogen production. It also selects the equipment combination scheme with the best economic efficiency throughout its entire life cycle, avoiding situations where power generation is high but returns are low. Thus, the selection scheme combines technological advancement with economic rationality.

[0026] Please refer to Figure 1 , Figure 1 A flowchart illustrating the method for selecting and recommending photovoltaic power generation equipment in the water electrolysis hydrogen production system described in this application embodiment is shown; as follows: Figure 1 As shown, the method includes the following steps S101-S106: S101. Obtain multiple candidate equipment selection combinations for photovoltaic power generation equipment; the equipment selections differ in different candidate equipment selection combinations; the equipment in the candidate equipment selection combinations includes: photovoltaic modules, brackets, and inverters; S102. Based on meteorological data, perform photovoltaic power generation simulation for each candidate equipment combination to determine the annual hourly output power value of each candidate equipment combination; the annual hourly output power value includes the power output value of the candidate equipment combination for each hour throughout the year; S103. Based on the maximum hydrogen production power and minimum cut-in power of the water electrolysis hydrogen production system, the annual hourly output power value is corrected to obtain the annual hourly effective hydrogen production power value for each candidate equipment selection combination. S104. Based on the effective hydrogen production power value per hour throughout the year and the hydrogen production power consumption of the water electrolysis hydrogen production system, calculate the annual hydrogen production of each candidate equipment combination. S105. Based on the construction cost and annual operating cost of the photovoltaic power station corresponding to each candidate equipment selection combination, as well as the unit hydrogen price at the project site and the annual hydrogen production volume corresponding to the water electrolysis hydrogen production system, determine the evaluation index corresponding to each candidate equipment selection combination. S106. Compare the evaluation indicators corresponding to each candidate equipment selection combination, and determine the target equipment selection combination that meets the preset selection conditions from the candidate equipment selection combinations based on the comparison results.

[0027] In step S101, multiple candidate equipment selection combinations for photovoltaic power generation equipment are obtained, and the equipment selections in different candidate equipment selection combinations are different; the equipment in the candidate equipment selection combinations include: photovoltaic modules, brackets, and inverters.

[0028] In other words, each candidate equipment selection combination includes photovoltaic modules, mounting brackets, and inverters; however, in different candidate equipment selection combinations, at least one type of equipment is selected differently.

[0029] It should be noted that, in some embodiments, the candidate device selection combination may include other devices that affect the photovoltaic characteristic curve.

[0030] Please refer to Figure 2 The process of obtaining multiple candidate equipment combinations for photovoltaic power generation includes the following steps S201-S202: S201. Obtain the equipment model file suitable for the equipment selection of the water electrolysis hydrogen production system; the parameters of the equipment model file corresponding to different equipment selections of the same equipment are different. S202. Combine the equipment selections of different types of equipment to obtain multiple candidate equipment selection combinations.

[0031] The device model files include PAN, OND, and other files.

[0032] Specifically, by communicating with major equipment manufacturers such as photovoltaic modules, brackets, and inverters, we collect PAN, OND, and other documents applicable to photovoltaic module selection for the project, which can then be used in subsequent simulation models.

[0033] The simulation model can be PVSyst.

[0034] For example, for photovoltaic modules: PAN files for two models of monocrystalline silicon modules from two major manufacturers were obtained; Option A and Option B; for inverters: Option C and Option D; for brackets: although no specific model file was available, two options and their key parameters were determined; Option E: fixed adjustable bracket with an optimal tilt angle of 25 degrees; flat single-axis tracking bracket with a tracking angle range of ±45 degrees.

[0035] The following are examples of several candidate equipment selection combinations. In practical applications, more candidate equipment selection combinations can be generated by iterating through the combinations.

[0036] Combination Option 1: Option A + Option C + Option E (Fixed Bracket); Combination Option 2: Selection A + Selection C + Selection F (tracking bracket); Combination Scheme 3: Selection B + Selection D + Selection E (fixed bracket); Combination Scheme 4: Selection B + Selection D + Selection F (tracking bracket).

[0037] In step S102, photovoltaic power generation simulation is performed on each candidate equipment selection combination based on meteorological data information to determine the annual hourly output power value of each candidate equipment selection combination; the annual hourly output power value includes the power output value of the candidate equipment selection combination for each hour throughout the year.

[0038] Here, the meteorological data specifically refers to the meteorological data of the project site corresponding to the water electrolysis hydrogen production system.

[0039] Please refer to Figure 3 The step of performing photovoltaic power generation simulation on each candidate equipment selection combination based on meteorological data information to determine the hourly output power value of each candidate equipment selection combination throughout the year includes the following steps S301-S302: S301. For each candidate equipment selection combination, input the equipment combination information and equipment model file of that candidate equipment selection combination into the simulation model; the equipment combination information represents the configuration parameters determined by the candidate equipment selection combination; S302. By processing meteorological data, equipment combination information and equipment model files of the candidate equipment selection combination through the simulation model, the hourly output power value of the candidate equipment selection combination throughout the year is determined.

[0040] The equipment combination information represents the system configuration parameters of the candidate equipment selection combination. For example, it mainly includes: the model and quantity of photovoltaic modules, the model and quantity of inverters, and the installation tilt angle and azimuth angle of the photovoltaic bracket, etc. The equipment combination information defines the structure of the photovoltaic array.

[0041] The equipment model files mainly refer to the PAN file (which describes the current-voltage characteristic curves of photovoltaic modules under different light and temperature conditions) and the OND file (which describes the efficiency curves, maximum power point tracking range, and other parameters of the inverter).

[0042] The meteorological data refers to data from the project site, including key meteorological parameters such as total horizontal irradiance, diffuse irradiance, ambient temperature, and wind speed per hour.

[0043] The hourly output power value throughout the year refers to the collection of DC or AC power (unit: kW) output by the photovoltaic power station every hour throughout the year.

[0044] In some embodiments, the step of processing meteorological data, equipment combination information of the candidate equipment selection combination, and equipment model files through the simulation model to determine the hourly output power value of the candidate equipment selection combination throughout the year includes: The simulation model processes meteorological data, equipment combination information and equipment model files of the candidate equipment selection combination, as well as the annual hourly array voltage and annual hourly array current corresponding to the candidate equipment selection combination. Based on the annual hourly array voltage and annual hourly array current corresponding to the candidate equipment selection combination, the annual hourly output power value of the candidate equipment selection combination is determined.

[0045] In other words, the candidate photovoltaic modules, inverters, brackets and other equipment are combined to form N groups of proposed combinations; the equipment combination information and equipment model files of the i-th (1≤i≤N) group are input into the PVSyst simulation software, and the meteorological data information provided by the simulation software is used to carry out simulation, and the array voltage and array current data for the whole year are output hourly, and then the hourly output power value of the i-th group of equipment combination is calculated.

[0046] Specifically, the simulation software reads meteorological data hourly, calculates the total irradiance received by the array plane at that moment based on the bracket type (tracking bracket) in the candidate equipment selection combination, and calculates the DC output current and voltage of each string at that moment using the model in the PAN file, combined with the ambient temperature; sums up the DC power of all strings and deducts the DC line loss; then inputs the summed DC power into the inverter model, and calculates the AC output power of the inverter by combining the efficiency curve in the OND file; finally, it summarizes the hourly AC output power values ​​for the whole year.

[0047] In some embodiments, the step of processing meteorological data, equipment combination information of the candidate equipment selection combination, and equipment model files through the simulation model to determine the hourly output power value of the candidate equipment selection combination throughout the year includes: Multiple meteorological data information of the project site corresponding to the water electrolysis hydrogen production system are obtained based on multiple meteorological data sources; The simulation model processes various meteorological data, equipment combination information and equipment model files of the candidate equipment selection combination to determine various annual hourly output power reference values ​​for the candidate equipment selection combination. By integrating various annual hourly output power reference values ​​for this candidate equipment selection combination, the annual hourly output power value of this candidate equipment selection combination is determined.

[0048] By integrating multiple annual hourly output power reference values ​​from this candidate equipment selection combination, specifically, a weighted average or other fusion method can be used to reduce the uncertainty of a single meteorological data source and obtain a set of annual hourly output power values ​​that better reflect the long-term real climate characteristics of the project site and have higher reliability.

[0049] In step S103, the hourly output power value throughout the year is corrected based on the maximum hydrogen production power and minimum cut-in power of the water electrolysis hydrogen production system to obtain the effective hourly hydrogen production power value throughout the year for each candidate equipment selection combination.

[0050] Please refer to Figure 4 The step of correcting the hourly output power value throughout the year based on the maximum hydrogen production power and minimum cut-in power of the water electrolysis hydrogen production system includes the following steps S401-S402: S401. Correct the data points of the hourly output power value throughout the year that are lower than the minimum cut-in power to zero; S402, Correct the data points in the annual hourly output power value that are higher than the maximum hydrogen production power to the maximum hydrogen production power value.

[0051] Based on the selection parameters of the electrolyzer, the minimum cut-in power and maximum hydrogen production power of the hydrogen production system are determined. Among the hourly output power values ​​of the i-th group throughout the year, the power values ​​lower than the minimum cut-in power of the hydrogen production system are set to zero, and the values ​​higher than the maximum hydrogen production power are set to the maximum hydrogen production power, so as to obtain the effective hydrogen production power value of the i-th group of equipment combinations throughout the year.

[0052] Assuming the minimum cut-in power of the electrolyzer system is 1200 kW (1.2 MW) and the rated power (maximum hydrogen production power) is 8000 kW (8.0 MW), at 6:00 AM on a certain day, the simulated photovoltaic output power is 850 kW. Since 850 kW < 1200 kW, the 850 kWh of electricity generated by the photovoltaic system during this period cannot be used for hydrogen production. At noon on a certain day, with abundant sunshine, the simulated photovoltaic output power is 9500 kW. Since 9500 kW > 8000 kW, 9500 - 8000 = 1500 kW of power is wasted during this period. When the simulated photovoltaic output power is between 850 kW and 8000 kW, the photovoltaic output is entirely within the high-efficiency operating range of the electrolyzer, and all the electricity can be effectively utilized for hydrogen production.

[0053] Based on this, the hourly output power values ​​obtained throughout the year are corrected by using the minimum cut-in power and maximum hydrogen production power constraints to better match the hydrogen production characteristics.

[0054] In step S104, based on the effective hydrogen production power value per hour throughout the year and the hydrogen production power consumption of the water electrolysis hydrogen production system, the annual hydrogen production capacity of each candidate equipment selection combination is calculated.

[0055] The annual hydrogen production volume, or total annual hydrogen production, refers to the total amount of hydrogen actually produced by the photovoltaic hydrogen production system within a complete year.

[0056] Please refer to Figure 5 The calculation of the annual hydrogen production capacity for each candidate equipment combination, based on the hourly effective hydrogen production power value throughout the year and the hydrogen production power consumption of the water electrolysis hydrogen production system, includes: S501. Based on the hourly effective hydrogen production power values ​​throughout the year, calculate the total effective hydrogen production power values ​​for the whole year; S502. The ratio of the total effective hydrogen production power value for the whole year to the hydrogen production power consumption of the water electrolysis hydrogen production system is determined as the annual hydrogen production of the candidate equipment selection combination.

[0057] The annual hydrogen production figure obtained here already takes into account the energy loss caused by the mismatch between the characteristics of the electrolyzer and the photovoltaic characteristic curves, making it more accurate.

[0058] In step S105, the evaluation index corresponding to each candidate equipment selection combination is determined based on the construction cost and annual operating cost of the photovoltaic power station corresponding to each candidate equipment selection combination, as well as the unit hydrogen price at the project site and the annual hydrogen production volume corresponding to the water electrolysis hydrogen production system.

[0059] In some embodiments, the evaluation metrics ; Among them, the The annual hydrogen production capacity of the i-th candidate equipment combination is represented by P, and P represents the unit hydrogen price at the project site corresponding to the water electrolysis hydrogen production system; The sum of the annual depreciation construction cost and the annual operating cost of the photovoltaic power plant corresponding to the i-th group of candidate equipment selection combinations is described. I Characterization and evaluation indicators.

[0060] The construction cost of a photovoltaic power plant refers to all one-time expenses incurred during the initial construction phase of the photovoltaic power plant and hydrogen production system. This mainly includes: equipment procurement costs (modules, inverters, brackets, etc.), land costs, construction costs, and installation costs. As can be seen, the construction costs differ depending on the combination of candidate equipment.

[0061] The construction cost of a photovoltaic power station can be deducted to an annual rate to obtain the annual depreciation construction cost; for example, if the expected lifespan is 10 years, then the construction cost of the photovoltaic power station / 10 = the annual depreciation construction cost.

[0062] Annual operating costs refer to the ongoing expenses incurred by the photovoltaic hydrogen production system during its annual operation and maintenance. These mainly include: regular equipment maintenance fees, insurance premiums, personnel salaries, and water costs (for hydrogen production).

[0063] For N sets of selected equipment combinations, the evaluation index corresponding to each set of selected equipment combinations is calculated repeatedly. I Then, based on step S106, the evaluation indicators corresponding to each candidate equipment selection combination are compared, and the target selection equipment combination that meets the preset selection conditions is determined from the candidate equipment selection combinations based on the comparison results.

[0064] In some embodiments, the evaluation indicators corresponding to each candidate equipment selection combination are compared, and a target equipment selection combination that meets the preset selection conditions is determined from the candidate equipment selection combinations based on the comparison results, including: Sort the evaluation indicators from high to low; Select the target equipment combination corresponding to the preset number of evaluation indicators that are ranked first.

[0065] For example, select an optimal combination of target equipment; or select three combinations of target equipment and then conduct a three-way comparison based on other dimensions.

[0066] Based on this, this application not only considers the total annual hydrogen production as an optimization target, but also further considers construction and operating costs, constructs economic evaluation indicators, and combines one-time construction costs with long-term operating costs and hydrogen production revenue to make selection decisions. This can directly screen out the equipment combination scheme with the best economic performance and the highest return on investment throughout the entire life cycle, avoiding the situation of high power generation but low revenue.

[0067] The following is a simulation diagram of the i-th group of candidate equipment selection combinations.

[0068] Please refer to Figure 6 , Figure 6 The simulation results of the array voltage and array current of the i-th group of candidate device selection combinations described in the embodiments of this application are shown; please refer to Figure 7 , Figure 7 Partial simulation data of the i-th group of candidate equipment selection combinations is shown; please refer to... Figure 8 , Figure 8 Partial power generation data of the i-th group of candidate equipment selection combinations are shown.

[0069] Based on the same inventive concept, this application also provides a photovoltaic power generation equipment selection recommendation device in a water electrolysis hydrogen production system, which corresponds to the photovoltaic power generation equipment selection recommendation method in the water electrolysis hydrogen production system. Since the principle of the device in this application embodiment is similar to the photovoltaic power generation equipment selection recommendation in the water electrolysis hydrogen production system described above, the implementation of the device can refer to the implementation of the method, and the repeated parts will not be described again.

[0070] Please refer to Figure 9 , Figure 9 This invention illustrates a schematic diagram of a photovoltaic power generation equipment selection recommendation device in a water electrolysis hydrogen production system according to an embodiment of this application. The device includes: The acquisition module 901 is used to acquire multiple candidate equipment selection combinations for photovoltaic power generation equipment; the equipment selections in different candidate equipment selection combinations are different; the equipment in the candidate equipment selection combinations include: photovoltaic modules, brackets, and inverters; The first determining module 902 is used to perform photovoltaic power generation simulation on each candidate equipment selection combination based on meteorological data information, and determine the annual hourly output power value of each candidate equipment selection combination; the annual hourly output power value includes the power value output by the candidate equipment selection combination every hour. The correction module 903 is used to correct the annual hourly output power value based on the maximum hydrogen production power and minimum cut-in power of the water electrolysis hydrogen production system, so as to obtain the annual hourly effective hydrogen production power value for each candidate equipment selection combination. The calculation module 904 is used to calculate the annual hydrogen production of each candidate equipment combination based on the annual hourly effective hydrogen production power value and the hydrogen production power consumption of the water electrolysis hydrogen production system. The second determining module 905 is used to determine the evaluation index corresponding to each candidate equipment selection combination based on the construction cost and annual operating cost of the photovoltaic power station corresponding to each candidate equipment selection combination, as well as the unit hydrogen price at the project site and the annual hydrogen production volume corresponding to the water electrolysis hydrogen production system. The third determining module 906 is used to compare the evaluation indicators corresponding to each candidate equipment selection combination, and determine the target selection equipment combination that meets the preset selection conditions from the candidate equipment selection combinations based on the comparison results.

[0071] In some embodiments, in the photovoltaic power generation equipment selection recommendation device of the water electrolysis hydrogen production system, the acquisition module, when acquiring multiple candidate equipment selection combinations of photovoltaic power generation equipment, is specifically used for: Obtain the equipment model file suitable for equipment selection in a water electrolysis hydrogen production system; different equipment selections for the same type of equipment correspond to different parameters in the equipment model file. By combining different types of equipment, multiple candidate equipment selection combinations can be obtained.

[0072] In some embodiments, in the photovoltaic power generation equipment selection recommendation device of the water electrolysis hydrogen production system, the first determining module, when performing photovoltaic power generation simulation based on meteorological data information to determine the annual hourly output power value of each candidate equipment selection combination, is specifically used for: For each candidate equipment selection combination, the equipment combination information and equipment model file of that candidate equipment selection combination are input into the simulation model; the equipment combination information represents the configuration parameters determined by the candidate equipment selection combination; By processing meteorological data, equipment combination information, and equipment model files of the candidate equipment selection combination using the simulation model, the hourly output power value of the candidate equipment selection combination throughout the year is determined.

[0073] In some embodiments, in the photovoltaic power generation equipment selection recommendation device of the water electrolysis hydrogen production system, the first determining module, when processing meteorological data information, equipment combination information of the candidate equipment selection combination, and equipment model file through the simulation model to determine the annual hourly output power value of the candidate equipment selection combination, is specifically used for: The simulation model processes meteorological data, equipment combination information and equipment model files of the candidate equipment selection combination, as well as the annual hourly array voltage and annual hourly array current corresponding to the candidate equipment selection combination. Based on the annual hourly array voltage and annual hourly array current corresponding to the candidate equipment selection combination, the annual hourly output power value of the candidate equipment selection combination is determined.

[0074] In some embodiments, in the photovoltaic power generation equipment selection recommendation device of the water electrolysis hydrogen production system, the first determining module, when processing meteorological data information, equipment combination information of the candidate equipment selection combination, and equipment model file through the simulation model to determine the annual hourly output power value of the candidate equipment selection combination, is specifically used for: Multiple meteorological data information of the project site corresponding to the water electrolysis hydrogen production system are obtained based on multiple meteorological data sources; The simulation model processes various meteorological data, equipment combination information and equipment model files of the candidate equipment selection combination to determine various annual hourly output power reference values ​​for the candidate equipment selection combination. By integrating various annual hourly output power reference values ​​for this candidate equipment selection combination, the annual hourly output power value of this candidate equipment selection combination is determined.

[0075] In some embodiments, in the photovoltaic power generation equipment selection recommendation device of the water electrolysis hydrogen production system, the correction module, when correcting the hourly output power value throughout the year based on the maximum hydrogen production power and minimum cut-in power of the water electrolysis hydrogen production system, is specifically used for: Correct the data points of the hourly output power value throughout the year that are lower than the minimum cut-in power to zero; Data points in the hourly output power data that are higher than the maximum hydrogen production power are corrected to the maximum hydrogen production power value.

[0076] In some embodiments, in the photovoltaic power generation equipment selection recommendation device of the water electrolysis hydrogen production system, the calculation module, when calculating the annual hydrogen production of each candidate equipment selection combination based on the annual hourly effective hydrogen production power value and the hydrogen production power consumption of the water electrolysis hydrogen production system, is specifically used for: Based on the hourly effective hydrogen production power values ​​throughout the year, calculate the total effective hydrogen production power values ​​for the whole year; The ratio of the total effective hydrogen production power value for the whole year to the hydrogen production power consumption of the water electrolysis hydrogen production system is determined as the annual hydrogen production capacity of the candidate equipment selection combination.

[0077] In some embodiments, in the photovoltaic power generation equipment selection and recommendation device of the water electrolysis hydrogen production system, the evaluation index ; Among them, the The annual hydrogen production capacity of the i-th candidate equipment combination is represented by P, and P represents the unit hydrogen price at the project site corresponding to the water electrolysis hydrogen production system; The sum of the annual depreciation construction cost and the annual operating cost of the photovoltaic power plant corresponding to the i-th group of candidate equipment selection combinations is described. I Characterization and evaluation indicators.

[0078] In some embodiments, in the photovoltaic power generation equipment selection recommendation device of the water electrolysis hydrogen production system, the third determining module, when comparing the evaluation indicators corresponding to each candidate equipment selection combination and determining the target equipment selection combination that meets the preset selection conditions from the candidate equipment selection combinations based on the comparison results, is specifically used for: Sort the evaluation indicators from high to low; Select the target equipment combination corresponding to the preset number of evaluation indicators that are ranked first. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems and devices described above can be referred to the corresponding processes in the method embodiments, and will not be repeated here. In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed mutual coupling or direct coupling or communication connection can be through some communication interfaces; the indirect coupling or communication connection of devices or modules can be electrical, mechanical, or other forms.

[0079] The modules described as separate components may or may not be physically separate. The components shown as modules may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0080] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0081] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a processor-executable, non-volatile, computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, a platform server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, ROM, RAM, magnetic disks, or optical disks.

[0082] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for selecting and recommending photovoltaic power generation equipment in a water electrolysis hydrogen production system, characterized in that, The method includes: Multiple candidate equipment selection combinations for photovoltaic power generation equipment are obtained; different equipment selection combinations involve different equipment; the equipment in the candidate equipment selection combinations includes: photovoltaic modules, brackets, and inverters; Photovoltaic power generation simulations were performed on each candidate equipment combination based on meteorological data to determine the hourly output power value of each candidate equipment combination throughout the year; the hourly output power value throughout the year includes the power output value of the candidate equipment combination for each hour throughout the year. Based on the maximum hydrogen production power and minimum cut-in power of the water electrolysis hydrogen production system, the annual hourly output power value is corrected to obtain the annual hourly effective hydrogen production power value for each candidate equipment selection combination. Based on the hourly effective hydrogen production power value throughout the year and the hydrogen production power consumption of the water electrolysis hydrogen production system, calculate the annual hydrogen production of each candidate equipment combination. Based on the construction cost and annual operating cost of the photovoltaic power plant corresponding to each candidate equipment selection combination, as well as the unit hydrogen price at the project site and the annual hydrogen production volume corresponding to the water electrolysis hydrogen production system, the evaluation indicators corresponding to each candidate equipment selection combination are determined. Compare the evaluation indicators corresponding to each candidate equipment selection combination, and determine the target equipment selection combination that meets the preset selection conditions from the candidate equipment selection combinations based on the comparison results.

2. The method for selecting and recommending photovoltaic power generation equipment in the water electrolysis hydrogen production system according to claim 1, characterized in that, The acquisition of multiple candidate equipment selection combinations for photovoltaic power generation equipment includes: Obtain the equipment model file suitable for equipment selection in a water electrolysis hydrogen production system; different equipment selections for the same type of equipment correspond to different parameters in the equipment model file. By combining different types of equipment, multiple candidate equipment selection combinations can be obtained.

3. The method for selecting and recommending photovoltaic power generation equipment in the water electrolysis hydrogen production system according to claim 2, characterized in that, The photovoltaic power generation simulation based on meteorological data is used to determine the hourly output power value of each candidate equipment combination throughout the year, including: For each candidate equipment selection combination, the equipment combination information and equipment model file of that candidate equipment selection combination are input into the simulation model; the equipment combination information represents the configuration parameters determined by the candidate equipment selection combination; By processing meteorological data, equipment combination information, and equipment model files of the candidate equipment selection combination using the simulation model, the hourly output power value of the candidate equipment selection combination throughout the year is determined.

4. The method for selecting and recommending photovoltaic power generation equipment in the water electrolysis hydrogen production system according to claim 3, characterized in that, The process of processing meteorological data, equipment combination information, and equipment model files of the candidate equipment selection combination through the simulation model to determine the hourly output power value of the candidate equipment selection combination throughout the year includes: The simulation model processes meteorological data, equipment combination information and equipment model files of the candidate equipment selection combination, as well as the annual hourly array voltage and annual hourly array current corresponding to the candidate equipment selection combination. Based on the annual hourly array voltage and annual hourly array current corresponding to this candidate equipment selection combination, the annual hourly output power value of this candidate equipment selection combination is determined.

5. The method for selecting and recommending photovoltaic power generation equipment in the water electrolysis hydrogen production system according to claim 3, characterized in that, The process of processing meteorological data, equipment combination information, and equipment model files of the candidate equipment selection combination through the simulation model to determine the hourly output power value of the candidate equipment selection combination throughout the year includes: Multiple meteorological data information of the project site corresponding to the water electrolysis hydrogen production system are obtained based on multiple meteorological data sources; The simulation model processes various meteorological data, equipment combination information and equipment model files of the candidate equipment selection combination to determine various annual hourly output power reference values ​​for the candidate equipment selection combination. By integrating various annual hourly output power reference values ​​for this candidate equipment selection combination, the annual hourly output power value of this candidate equipment selection combination is determined.

6. The method for selecting and recommending photovoltaic power generation equipment in the water electrolysis hydrogen production system according to claim 1, characterized in that, The step of correcting the hourly output power value throughout the year based on the maximum hydrogen production power and minimum cut-in power of the water electrolysis hydrogen production system includes: Correct the data points of the hourly output power value throughout the year that are lower than the minimum cut-in power to zero; Data points in the hourly output power data that are higher than the maximum hydrogen production power are corrected to the maximum hydrogen production power value.

7. The method for selecting and recommending photovoltaic power generation equipment in the water electrolysis hydrogen production system according to claim 1, characterized in that, The calculation of the annual hydrogen production capacity for each candidate equipment combination, based on the hourly effective hydrogen production power value throughout the year and the hydrogen production power consumption of the water electrolysis hydrogen production system, includes: Based on the hourly effective hydrogen production power values ​​throughout the year, calculate the total effective hydrogen production power values ​​for the whole year; The ratio of the total effective hydrogen production power value for the whole year to the hydrogen production power consumption of the water electrolysis hydrogen production system is determined as the annual hydrogen production capacity of the candidate equipment selection combination.

8. The method for selecting and recommending photovoltaic power generation equipment in the water electrolysis hydrogen production system according to claim 1, characterized in that, The evaluation indicators ; Among them, the The annual hydrogen production capacity of the i-th candidate equipment combination is represented by P, and P represents the unit hydrogen price at the project site corresponding to the water electrolysis hydrogen production system; The sum of the annual depreciation construction cost and the annual operating cost of the photovoltaic power plant corresponding to the i-th group of candidate equipment selection combinations is described. I Characterization and evaluation indicators.

9. The method for selecting and recommending photovoltaic power generation equipment in the water electrolysis hydrogen production system according to claim 8, characterized in that, Compare the evaluation indicators corresponding to each candidate equipment selection combination, and based on the comparison results, determine the target equipment selection combination that meets the preset selection conditions from the candidate equipment selection combinations, including: Sort the evaluation indicators from high to low; Select the target equipment combination corresponding to the preset number of evaluation indicators that are ranked first.

10. A device for recommending photovoltaic power generation equipment in a water electrolysis hydrogen production system, characterized in that, The device includes: The acquisition module is used to acquire multiple candidate equipment selection combinations for photovoltaic power generation equipment; the equipment selections in different candidate equipment selection combinations are different; the equipment in the candidate equipment selection combinations include: photovoltaic modules, brackets, and inverters; The first determining module is used to perform photovoltaic power generation simulation on each candidate equipment selection combination based on meteorological data information, and determine the annual hourly output power value of each candidate equipment selection combination; the annual hourly output power value includes the power value output by the candidate equipment selection combination every hour. The correction module is used to correct the hourly output power value throughout the year based on the maximum hydrogen production power and the minimum cut-in power of the water electrolysis hydrogen production system, so as to obtain the effective hourly hydrogen production power value throughout the year for each candidate equipment selection combination. The calculation module is used to calculate the annual hydrogen production of each candidate equipment combination based on the annual hourly effective hydrogen production power value and the hydrogen production power consumption of the water electrolysis hydrogen production system. The second determining module is used to determine the evaluation index corresponding to each candidate equipment selection combination based on the construction cost and annual operating cost of the photovoltaic power station corresponding to each candidate equipment selection combination, as well as the unit hydrogen price at the project site and the annual hydrogen production volume corresponding to the water electrolysis hydrogen production system. The third determination module is used to compare the evaluation indicators corresponding to each candidate equipment selection combination, and determine the target selection equipment combination that meets the preset selection conditions from the candidate equipment selection combinations based on the comparison results.

Images