Electrolytic cell cluster control method and device, computer equipment and readable storage medium

Abstract

The application discloses an electrolytic tank cluster control method and device, computer equipment and a readable storage medium. The method comprises the following steps: determining the shift state of each electrolytic tank in the current period to obtain an initial dynamic tank, an initial static tank and an initial start-stop tank; determining the resident power point of the initial dynamic tank and the initial static tank, adjusting the resident power point of the initial dynamic tank and the initial static tank according to a photovoltaic prediction curve and a preset control strategy, and operating according to the adjusted intermediate dynamic tank and the intermediate static tank; updating the aging state of the intermediate dynamic tank and the intermediate static tank, and judging whether the relative relationship of the aging state of the intermediate dynamic tank and the intermediate static tank changes; if the relative relationship changes, updating the shift state of the intermediate dynamic tank and the intermediate static tank to obtain an optimized dynamic tank and an optimized static tank, and then entering the real-time control strategy step again. The application solves the contradiction between the stable operation of the electrolytic tank and the hydrogen production demand under the photovoltaic fluctuation.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic hydrogen production technology, and in particular to a method, apparatus, computer equipment, and readable storage medium for controlling an electrolyzer cluster. Background Technology

[0002] Many untapped photovoltaic (PV) resources are located in areas with low electricity demand. Due to the high cost of constructing power transmission channels, local consumption has become one of the solutions for developing PV resources. Among these, photovoltaic hydrogen production is a sustainable method for local consumption.

[0003] However, due to the significant intermittency and volatility of photovoltaic power, the electrolyzer, as a core intermediate device that adapts to power fluctuations and ensures downstream hydrogen supply, will inevitably incur additional aging costs due to fluctuations and start-ups / shutdowns, while prioritizing hydrogen production. Therefore, how to achieve cluster control of multiple electrolyzers under fluctuating photovoltaic conditions, and minimize equipment aging costs while ensuring downstream production requirements, has become a crucial control issue in photovoltaic hydrogen production systems. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to overcome the shortcomings of the prior art and provide an electrolytic cell cluster control method, apparatus, computer equipment and readable storage medium.

[0005] This invention provides the following technical solution:

[0006] In a first aspect, this disclosure provides a method for controlling an electrolytic cell cluster, the method comprising:

[0007] The rotation status of each electrolytic cell in the current cycle is determined based on the performance parameters of each electrolytic cell, thus obtaining the initial dynamic cell, the initial static cell, and the initial start-stop cell.

[0008] The constant power points of the initial dynamic tank and the initial static tank are determined, the photovoltaic prediction curve is obtained, the constant power points of the initial dynamic tank and the initial static tank are adjusted according to the photovoltaic prediction curve and the preset control strategy, and the intermediate dynamic tank and the intermediate static tank are operated according to the adjusted control strategy.

[0009] Update the aging status of the intermediate dynamic tank and the intermediate static tank, and determine whether the relative relationship between the aging status of the intermediate dynamic tank and the intermediate static tank has changed;

[0010] If any changes occur, the rotation status of the intermediate dynamic slot and the intermediate static slot is updated to obtain the optimized dynamic slot and the optimized static slot. The resident power points of the optimized dynamic slot and the optimized static slot are then adjusted according to the photovoltaic prediction curve and the preset control strategy, and the slots are operated according to the adjusted final dynamic slot and final static slot.

[0011] Further, the step of determining the initial rotation state of each electrolytic cell in the current cycle based on the performance parameters of each electrolytic cell to obtain the initial dynamic cell and the initial static cell includes:

[0012] Obtain the performance parameters of each electrolytic cell, including its health status and expected aging degree;

[0013] The electrolyzer that achieves a first preset threshold in both hydrogen production efficiency and hydrogen production quality under steady-state conditions is defined as the initial static cell.

[0014] The electrolyzer that achieves a second preset threshold for hydrogen production efficiency and quality under dynamic conditions is defined as the initial dynamic cell.

[0015] Further, adjusting the resident power points of the initial dynamic tank and the initial static tank according to the photovoltaic prediction curve and the preset control strategy includes:

[0016] Based on the direction and extent of photovoltaic source fluctuations in the photovoltaic prediction curve, and using a preset control strategy, the resident power points of the initial dynamic grid, the initial static grid, and the initial start-stop grid are adjusted under emergency stop, loading, and unloading scenarios, respectively.

[0017] Furthermore, adjusting the resident power points of the initial dynamic slot, the initial static slot, and the initial start-stop slot under emergency stop, loading, and unloading scenarios respectively includes:

[0018] In an emergency stop scenario, it is determined whether the initial start-stop slot is activated. If the initial start-stop slot is activated, it is determined whether the initial dynamic slot is reduced to the first lower limit power.

[0019] If the initial dynamic slot power decreases to the first lower limit, then determine whether the initial static slot power decreases to the second lower limit.

[0020] If the initial static cell power drops to the second lower limit, it is determined whether the energy storage should start emergency power supply. If the energy storage should start emergency power supply, it is determined whether the emergency power supply duration of the energy storage has ended. If the emergency power supply duration of the energy storage has ended, all the electrolytic cells are shut down.

[0021] Furthermore, the adjustment of the resident power points of the initial dynamic slot, the initial static slot, and the initial start-stop slot under emergency stop, loading, and unloading scenarios respectively also includes:

[0022] In a loading scenario, determine whether the initial static slot is at full power. If the initial static slot is at full power, then determine whether the initial dynamic slot is at full power.

[0023] If the initial dynamic tank is at full power, then determine whether the initial start-stop tank is at full power. If the initial start-stop tank is at full power, then determine whether the energy storage has started leasing and consumption.

[0024] If the energy storage is started for leased consumption, it is determined whether the leased consumption period of the energy storage has ended. If the leased consumption period of the energy storage has ended, each of the electrolytic cells is operated at the current power.

[0025] Furthermore, the adjustment of the resident power points of the initial dynamic slot, the initial static slot, and the initial start-stop slot under emergency stop, loading, and unloading scenarios respectively also includes:

[0026] In a load reduction scenario, it is determined whether the initial dynamic slot has been reduced to the first lower limit power. If the initial dynamic slot has been reduced to the first lower limit power, it is determined whether the initial start-stop slot has been reduced to the third lower limit power.

[0027] If the initial start-stop tank power is reduced to the third lower limit power, it is determined whether the energy storage has started leased power supply. If the energy storage has started leased power supply, it is determined whether the leased power supply duration of the energy storage has ended.

[0028] If the leased power supply period of the energy storage ends, it is determined whether the initial static tank has been reduced to the second lower limit power. If the initial static tank has been reduced to the second lower limit power, it is determined whether the initial start-stop tank has been started.

[0029] If the initial start-stop cell is activated, it is determined whether the current time period is during the sunset period. If the current time period is during the sunset period, each electrolytic cell is gradually shut down.

[0030] Further, updating the aging state of the intermediate dynamic slot and the intermediate static slot includes:

[0031] The ratio of the full-load hydrogen production standard volume to the rated standard volume of each intermediate dynamic tank and each intermediate static tank is monitored, and the ratio is used as the health status of the intermediate dynamic tank and the intermediate static tank, wherein the health status is inversely proportional to the aging state.

[0032] Secondly, this disclosure provides an electrolytic cell cluster control device, the device comprising:

[0033] The determination module is used to determine the rotation status of each electrolytic cell in the current cycle based on the performance parameters of each electrolytic cell, and to obtain the initial dynamic cell, the initial static cell, and the initial start-stop cell;

[0034] The first adjustment module is used to determine the resident power points of the initial dynamic tank and the initial static tank, obtain the photovoltaic prediction curve, adjust the resident power points of the initial dynamic tank and the initial static tank according to the photovoltaic prediction curve and the preset control strategy, and operate according to the adjusted intermediate dynamic tank and intermediate static tank.

[0035] The update module is used to update the aging status of the intermediate dynamic slot and the intermediate static slot, and to determine whether the relative relationship between the aging status of the intermediate dynamic slot and the intermediate static slot has changed.

[0036] The second adjustment module is used to update the rotation state of the intermediate dynamic slot and the intermediate static slot if changes occur, to obtain the optimized dynamic slot and the optimized static slot, and to continue to adjust the resident power points of the optimized dynamic slot and the optimized static slot according to the photovoltaic prediction curve and the preset control strategy, and to operate according to the adjusted final dynamic slot and final static slot.

[0037] Thirdly, this disclosure provides a computer device, which includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the steps of the electrolytic cell cluster control method described in the first aspect.

[0038] Fourthly, this disclosure provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the electrolytic cell cluster control method described in the first aspect.

[0039] The beneficial effects of this application are:

[0040] The electrolytic cell cluster control method provided in this application includes: determining the rotation state of each electrolytic cell in the current cycle based on the performance parameters of each electrolytic cell, obtaining an initial dynamic cell, an initial static cell, and an initial start-stop cell; determining the resident power points of the initial dynamic cell and the initial static cell, obtaining a photovoltaic prediction curve, adjusting the resident power points of the initial dynamic cell and the initial static cell according to the photovoltaic prediction curve and a preset control strategy, and operating according to the adjusted intermediate dynamic cell and intermediate static cell; updating the aging state of the intermediate dynamic cell and the intermediate static cell, and determining whether the relative relationship between the aging states of the intermediate dynamic cell and the intermediate static cell has changed; if it has changed, updating the rotation state of the intermediate dynamic cell and the intermediate static cell to obtain an optimized dynamic cell and an optimized static cell, and continuing to adjust the resident power points of the optimized dynamic cell and the optimized static cell according to the photovoltaic prediction curve and the preset control strategy, and operating according to the adjusted final dynamic cell and final static cell. This application resolves the contradiction between the stable operation of electrolyzers and the demand for hydrogen production under photovoltaic fluctuations, minimizing equipment aging costs while ensuring downstream production requirements.

[0041] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0042] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort. In the various drawings, similar components are numbered similarly.

[0043] Figure 1 A flowchart of an electrolytic cell cluster control method provided in an embodiment of this application is shown;

[0044] Figure 2 A flowchart of another electrolytic cell cluster control method provided in an embodiment of this application is shown;

[0045] Figure 3 The simulated decay paths of each slot are shown in one example provided by an embodiment of this application;

[0046] Figure 4 This application provides an embodiment of a photovoltaic power output curve for cloudy weather.

[0047] Figure 5 This application provides an embodiment of a control result for a single day under cloudy weather conditions.

[0048] Figure 6 This application provides an embodiment of a photovoltaic power output curve for a sunny day.

[0049] Figure 7 This application provides an embodiment of a photovoltaic power output curve for a cloudy day.

[0050] Figure 8 This application provides an embodiment of a curve illustrating the weighted influence of the number of start-stop cycles on the aging curve.

[0051] Figure 9 This application provides an embodiment of a curve illustrating the weighted influence of fluctuation coefficient on an aging curve.

[0052] Figure 10 The equivalent full-load runtime of the three methods provided in the embodiments of this application is shown;

[0053] Figure 11 The equivalent aging costs of the three methods provided in the embodiments of this application are shown;

[0054] Figure 12 A schematic diagram of the structure of an electrolytic cell cluster control device provided in an embodiment of this application is shown. Detailed Implementation

[0055] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0056] It should be noted that when an element is said to be "fixed" to another element, it can be directly on the other element or there may be an intervening element. When an element is said to be "connected" to another element, it can be directly connected to the other element or there may be an intervening element. Conversely, when an element is said to be "directly" on another element, there is no intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0057] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0058] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0059] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the template description is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0060] Example 1

[0061] It should be noted in advance that the electrolytic cell cluster control method of the present invention includes two layers of optimization. The first is the overall optimization objective: to minimize the total equivalent aging cost after long-term operation. In this invention, the total cost includes the aging cost of the electrolytic cells and the leasing cost of energy storage.

[0062] The aging cost of electrolytic cells is related to the equivalent full-load operating time, the number of start-stop cycles, and the volatility. An aging model for electrolytic cells is established, and the aging rate can be calculated based on information such as the equivalent full-load operating time, the number of start-stop cycles, and the degree of volatility. The aging rate is primarily correlated with the equivalent full-load operating time; however, this correlation can be represented by different curves depending on the design and manufacturing methods of different manufacturers. The number of start-stop cycles and the degree of volatility are used as weighting factors to alter the slope of this curve.

[0063] In addition, the use of energy storage is to mitigate the fluctuations experienced by the electrolyzer to a certain extent. In other words, the cost of the electrolyzer's aging due to fluctuations is transferred to the cost of using energy storage. An equivalent rental cost can be considered when the energy storage is leased. That is, for a longer period of insufficient power, the cost is settled based on the borrowed energy storage capacity, and for a short period of power drop causing a shutdown emergency backup, the cost is settled based on the leased energy storage as an emergency power source.

[0064] However, due to the high cost of renting energy storage, the electrolyzer status should be changed first, and then energy storage should be used as a supplement. Considering that the energy storage is provided by a third party, its available installed capacity is assumed to be infinite, meaning that both the amount of electricity / power that can be absorbed and the amount of electricity / power that can be output are considered infinite and readily available.

[0065] like Figure 1 The diagram shown is a flowchart of an electrolytic cell cluster control method according to an embodiment of this application. The electrolytic cell cluster control method provided in this application includes the following steps:

[0066] Step S110: Determine the rotation status of each electrolytic cell in the current cycle based on the performance parameters of each electrolytic cell to obtain the initial dynamic cell, the initial static cell, and the initial start-stop cell.

[0067] Electrolytic cells can be classified into three states: dynamic cells, static cells, and start-stop cells. Dynamic cells refer to cells that dynamically change power within a reasonable range. Static cells refer to cells that operate continuously at a fixed power, typically at full load. Start-stop cells refer to cells that, after a sudden power change, are prioritized to be started or shut down if the dynamic cells cannot meet the demand.

[0068] Specifically, the health status and expected aging degree of each electrolyzer in the current cycle are first obtained. For electrolyzers with severe expected aging, they can be used as initial start-up and shutdown cells, which are mostly in standby mode and do not participate in long-term operation, thus effectively mitigating aging. For electrolyzers that achieve a first preset threshold in hydrogen production efficiency and quality under steady state, they can be used as initial static cells. For electrolyzers that achieve a second preset threshold in hydrogen production efficiency and quality under dynamic conditions, they have excellent dynamic performance and can be used as initial dynamic cells.

[0069] Furthermore, the energy storage cost can be estimated based on the current rotation status of the electrolyzers. Since the dynamic capabilities of each electrolyzer change after rotation, the energy storage support required will vary, resulting in different equivalent energy storage costs.

[0070] It should be noted that the rotation status of the electrolytic cell is updated once at a fixed period (such as once a week, once a month, once a quarter, etc.), or it can be temporarily updated when the current rotation status is deemed no longer suitable while continuously tracking the aging status.

[0071] Step S120: Determine the resident power points of the initial dynamic tank and the initial static tank, obtain the photovoltaic prediction curve, adjust the resident power points of the initial dynamic tank and the initial static tank according to the photovoltaic prediction curve and the preset control strategy, and operate according to the adjusted intermediate dynamic tank and intermediate static tank.

[0072] In this embodiment, based on the monthly hydrogen demand, photovoltaic power output, and electrolyzer installation status, the permanent power points of the initial dynamic and static cells in rotation are determined. Specifically, the permanent power point of the static cells is rationally configured according to the typical output of photovoltaic installations in each season, following the principle of lower power points for start-up / shutdown cells and higher power points for dynamic cells. The configured power point, combined with the static cell power point, can absorb the highest load of the day. If hydrogen production does not require full absorption of photovoltaic power, the plan is determined based on the required hydrogen production output.

[0073] After obtaining the photovoltaic forecast curve for a certain day, based on the direction and degree of photovoltaic source fluctuations in the forecast curve, and using a preset control strategy, the constant power points of the initial dynamic grid, initial static grid, and initial start-stop grid are adjusted under emergency stop, loading, and unloading scenarios, respectively. The specific process is as follows:

[0074] This invention provides a control strategy table (see Table 1 below) to initially determine the action direction of different jogging states of the electrolytic slot under emergency stop, loading, and unloading scenarios. It should be noted that the specific action power values ​​need to be calculated based on the response power after fluctuation and the responsiveness of the electrolytic slot. The symbols are explained as follows:

[0075] (1) Equipment symbols: S: static tank; D: dynamic tank; Q: start-stop tank; E: energy storage;

[0076] (2) Action symbols: —: maintain the status quo or do nothing; ↘: power decreases gradually; ↓: power decreases sharply; ↗: power increases gradually; ↑: power increases sharply; O: start; ×: stop; C: energy storage charging; D: energy storage discharging.

[0077] Table 1

[0078]

[0079] like Figure 2 The diagram shown is a control strategy diagram for photovoltaic fluctuations. As can be seen from the diagram:

[0080] (1) In an emergency stop scenario, determine whether the initial start-stop tank is started. If the initial start-stop tank is not started, then the initial start-stop tank is closed. If the initial start-stop tank is started, determine whether the initial dynamic tank is reduced to the first lower limit power. If the initial dynamic tank is not reduced to the first lower limit power, then the initial dynamic tank is reduced to the first lower limit power. If the initial dynamic tank is reduced to the first lower limit power, determine whether the initial static tank is reduced to the second lower limit power. If the initial static tank is not reduced to the second lower limit power, then the initial static tank is reduced to the second lower limit power. If the initial static tank is reduced to the second lower limit power, then determine whether the energy storage is started for emergency power supply. If the energy storage is started for emergency power supply, then determine whether the emergency power supply duration of the energy storage has ended. If the emergency power supply duration of the energy storage has ended, then all electrolytic cells are shut down.

[0081] (2) In the loading scenario, determine whether the initial static cell is at full power. If the initial static cell is not at full power, increase the initial static cell to full power. If the initial static cell is at full power, determine whether the initial dynamic cell is at full power. If the initial dynamic cell is not at full power, increase the initial dynamic cell to full power. If the initial dynamic cell is at full power, determine whether the initial start-stop cell is at full power. If the initial start-stop cell is not at full power, increase the initial start-stop cell to full power. If the initial start-stop cell is at full power, determine whether the energy storage has started leasing for consumption. If the energy storage has started leasing for consumption, determine whether the energy storage leasing consumption period has ended. If the energy storage leasing consumption period has not ended, the photovoltaic fluctuation ends. If the energy storage leasing consumption period has ended, each electrolytic cell operates according to the current power.

[0082] (3) In the load reduction scenario, determine whether the initial dynamic grid has been reduced to the first lower limit power. If the initial dynamic grid has not been reduced to the first lower limit power, reduce the initial dynamic grid to the first lower limit power and determine whether it responds to photovoltaic fluctuations. If it does not respond, jump to the case where the initial dynamic grid has been reduced to the first lower limit power. If the initial dynamic grid has been reduced to the first lower limit power, determine whether the initial start-stop grid has been reduced to the third lower limit power. If the initial start-stop grid has not been reduced to the third lower limit power, reduce the initial start-stop grid to the third lower limit power and determine whether it responds to photovoltaic fluctuations. If it does not respond, jump to the case where the initial start-stop grid has been reduced to the third lower limit power. If the initial start-stop grid has been reduced to the third lower limit power, determine whether the energy storage has been started for leasing to supply power. If the energy storage has been started... If the energy storage is leased for power supply, the system checks whether the leased power supply period has ended. If the leased power supply period has not ended, the photovoltaic fluctuation ends. If the leased power supply period has ended, the system checks whether the initial static cell has been reduced to the second lower limit power. If the initial static cell has not been reduced to the second lower limit power, it is reduced to the second lower limit power. If the initial static cell has been reduced to the second lower limit power, the system checks whether the initial start-stop cell has been started. If the initial start-stop cell has not been started, it is shut down. If the initial start-stop cell has been started, the system checks whether the current time period is during sunset. If the current time period is during sunset, each electrolytic cell is gradually shut down. If the current time period is not during sunset, the energy storage starts emergency power supply. When the emergency power supply period ends, each electrolytic cell is gradually shut down.

[0083] In general, if the static grid does not require power increase, prioritize adjusting the power of the dynamic grid to its upper / lower limits. Secondly, if the start-stop grid can operate, add or remove loads to it. If adjusting the power of the dynamic and start-stop grids is insufficient, unless the photovoltaic output naturally disappears in the evening, allow the static grid to adjust its power appropriately, supplemented by energy storage output. If this is still insufficient, turn the start-stop grid on or off. Finally, if the fluctuations persist after using emergency energy storage for the required duration, gradually shut down the dynamic and static grids.

[0084] Step S130: Update the aging status of the intermediate dynamic tank and the intermediate static tank, and determine whether the relative relationship between the aging status of the intermediate dynamic tank and the intermediate static tank has changed.

[0085] Furthermore, the aging status of the intermediate dynamic tank and the intermediate static tank is updated daily. Specifically, it is necessary to monitor the ratio of the full-load hydrogen production standard volume to the rated standard volume of each intermediate dynamic tank and each intermediate static tank. The ratio is used as the health status of the intermediate dynamic tank and the intermediate static tank, wherein the health status is inversely proportional to the aging status.

[0086] It should be noted that the relationship between the aging curve and the full-load running time is provided by the manufacturer, as is the weighting relationship between volatility and the number of start-stop cycles on the aging rate.

[0087] In step S140, if a change occurs, the rotation status of the intermediate dynamic slot and the intermediate static slot is updated to obtain the optimized dynamic slot and the optimized static slot. The resident power points of the optimized dynamic slot and the optimized static slot are then adjusted according to the photovoltaic prediction curve and the preset control strategy, and the slots are operated according to the adjusted final dynamic slot and final static slot.

[0088] If the relative relationship of aging states changes, or if the set cycle range is reached after continuous monitoring, the rotation status of intermediate dynamic and intermediate static tanks is updated based on the aging cost and energy storage rental cost of the next cycle predicted by historical data, thus obtaining optimized dynamic and optimized static tanks.

[0089] After updating the rotation status to obtain the optimized dynamic and optimized static slots, the real-time control strategy step is entered again. That is, the resident power points of the optimized dynamic and optimized static slots are adjusted according to the photovoltaic prediction curve and the preset control strategy, and the slots are operated according to the adjusted final dynamic and final static slots.

[0090] In one optional implementation, the electrolytic cell cluster control method of this application will be specifically described below with reference to an embodiment. Embodiment scenario:

[0091] Assume the photovoltaic hydrogen production system includes three electrolyzers, each from a different manufacturer, with different aging curves, response speeds, and recommended load ranges. Initially, cell A is set as a static cell, cell B as a dynamic cell, and cell C as a start-up / shutdown cell. The main parameters of each cell are shown in Table 2.

[0092] Table 2

[0093]

[0094]

[0095] Among them, the aging curve, that is, the simulated degradation path of each tank in the case, is as follows: Figure 3 As shown, the daily photovoltaic curve for a cloudy day is as follows: Figure 4 As shown, it includes various scenarios such as gradual increase in power at sunrise, sudden stop, loading, load reduction, and gradual decrease in power at sunset, which are used to illustrate the application of control strategies for fluctuations within a single day.

[0096] Figure 5 The control results for this typical daytime event are described as follows: At point A, load shedding occurred before reaching the recommended load of the static grid. Point A' was temporarily using leased energy storage, but load shedding continued after 15 minutes. The leased energy storage period ended, and the static grid began load shedding. Load shedding occurred at point B. The dynamic grid, with the assistance of the energy storage at point B', actively reduced its operating level to the lower limit. Load shedding continued thereafter, with the static grid also participating in the load shedding. In area C, the start-stop grid started after the dynamic grid reached its saturation point, but subsequent load shedding prioritized the dynamic grid's power reduction. An emergency shutdown occurred at the end of area C. The start-stop grid shut down first, followed by the dynamic grid. The static grid relied on the energy storage at point D' to maintain its offline power. After the emergency shutdown, the static grid shut down. The energy storage at point D was used to absorb renewable energy. Subsequently, the photovoltaic system recovered quickly. At this point, the static grid, not yet cooled, could quickly catch up with the power output. After reaching full load, the dynamic grid started. However, the dynamic grid's prolonged shutdown prevented it from absorbing all the photovoltaic power. The photovoltaic power at point E was absorbed by the energy storage. After 4 PM, the photovoltaic system gradually and naturally reduced its load, and the dynamic and static grids were gradually shut down. After point F, the temperature has dropped below the safe operating range, and the static tank has actually been closed.

[0097] The case study sets up a 5-year simulation scenario, with typical days including cloudy, sunny, and overcast weather, and the number of days occurring according to the ratio of the three weather types: 2:7:1. Sunny and overcast days, for example... Figure 6 and Figure 7 As shown.

[0098] The volatility of photovoltaic power is defined as the difference between the fitted curve of the region's historical full-power output for that month and the curve of the current day, after normalization. The variance of this difference curve is then calculated. The variance obtained by subtracting zero from the original curve is used as a reference, and its ratio is the volatility coefficient.

[0099] The impact of the number of start-stop cycles on the weighting of the aging curve ω1 is as follows. Figure 8 As shown, the influence of the fluctuation coefficient on the weighting of the aging curve ω2 is as follows: Figure 9 As shown, considering the photovoltaic situation and hydrogen demand in the current season, the static tank operates at full load, the dynamic tank operates at 60% load, and the start-stop tank maintains 20% operation if it is started.

[0100] Understandably, each tank has some insulation measures, but the temperature will gradually decrease after shutdown. If the shutdown time is short, the alkali solution will still be at a relatively high temperature when restarting, allowing for rapid startup and power increase to the recommended load range. To ensure minimal downtime for cooling, energy storage will be leased for short periods in unavoidable shutdowns, but the emergency leasing time will not exceed 15 minutes; if this time is exceeded, shutdown is mandatory.

[0101] For example, the price for a single emergency energy storage operation is 12 yuan / kW / operation, the price per kilowatt-hour for the consumed electricity is 1.5 yuan / kWh, and the price per kilowatt-hour for the released electricity is 3.5 yuan / kWh.

[0102] To illustrate the advantages of this implementation method (rotation method), the following comparison scheme is set up:

[0103] (1) Traditional Method 1 (One-by-One Method): Fluctuation Coordination Method: Coordinate fluctuations sequentially; Start-up Method: Start the machine sequentially to reach a certain load, and then start the next one;

[0104] (2) Traditional Method 2 (Equal Distribution Method): Fluctuation Coordination Method: All slots equalize the fluctuation; Start-up Method: Start up synchronously with equal distribution of power.

[0105] As can be seen from the above, regarding the rotation status, in the initial stage of operation, Tank A, due to its large installed capacity and high efficiency, is used as a static tank; Tank B, with its good dynamic performance, is used as a dynamic tank; and Tank C, with its rapid initial degradation rate, is used as a start-up / shutdown tank to reduce operating time. Subsequently, Tank A enters a period of rapid degradation, while Tank C degrades less, and the two are replaced. Simultaneously, Tank B increases its power occupancy point to meet hydrogen production demands. In the later stages, Tank B's degradation indicates it is being used as a start-up / shutdown tank, and Tank A is replaced back as a static tank.

[0106] See Figure 10 , which is the equivalent full-load running time of the three methods. Since the recommended load range accounts for a large proportion of the operation, the efficiency difference of various tanks in this range is not large. Therefore, this time is positively correlated with the hydrogen production power consumption and hydrogen production. Here, the time is used to indirectly reflect the hydrogen production.

[0107] See Figure 11 The figure represents the equivalent aging cost (in ten thousand yuan) for the three methods. The rotation method, in addition to incurring equipment aging costs of 2.831 million yuan, also includes energy storage leasing costs of 1.132 million yuan, which are also included in the equivalent aging cost. It is evident that the proposed technology significantly reduces the equivalent aging cost while extending the service life.

[0108] In another alternative implementation, the same type of tanks from the same batch can be rotated among static tanks, dynamic tanks, and start-stop tanks to avoid a single tank being constantly under harsh operating conditions and being prematurely eliminated.

[0109] The electrolyzer cluster control method provided in this application determines the rotation state of each electrolyzer in the current cycle based on its performance parameters, obtaining initial dynamic cells, initial static cells, and initial start-stop cells. It then determines the resident power points of the initial dynamic and initial static cells, obtains photovoltaic prediction curves, adjusts the resident power points of the initial dynamic and initial static cells according to the photovoltaic prediction curves and a preset control strategy, and operates according to the adjusted intermediate dynamic and intermediate static cells. The aging state of the intermediate dynamic and intermediate static cells is updated, and it is determined whether the relative relationship between their aging states has changed. If it has changed, the rotation state of the intermediate dynamic and intermediate static cells is updated to obtain optimized dynamic and optimized static cells. The resident power points of the optimized dynamic and optimized static cells are then adjusted again according to the photovoltaic prediction curves and the preset control strategy, and the cells operate according to the adjusted final dynamic and final static cells. This application solves the contradiction between stable operation of electrolyzers and hydrogen production demand under photovoltaic fluctuations, minimizing equipment aging costs while ensuring downstream production requirements.

[0110] Example 2

[0111] like Figure 12 The diagram shown is a structural schematic of an electrolytic cell cluster control device 1200 according to an embodiment of this application. The device includes:

[0112] The determination module 1210 is used to determine the rotation status of each electrolytic cell in the current cycle based on the performance parameters of each electrolytic cell, and to obtain the initial dynamic cell, the initial static cell, and the initial start-stop cell;

[0113] The first adjustment module 1220 is used to determine the resident power points of the initial dynamic tank and the initial static tank, obtain the photovoltaic prediction curve, adjust the resident power points of the initial dynamic tank and the initial static tank according to the photovoltaic prediction curve and the preset control strategy, and operate according to the adjusted intermediate dynamic tank and intermediate static tank.

[0114] The update module 1230 is used to update the aging state of the intermediate dynamic slot and the intermediate static slot, and to determine whether the relative relationship between the aging states of the intermediate dynamic slot and the intermediate static slot has changed.

[0115] The second adjustment module 1240 is used to update the rotation state of the intermediate dynamic slot and the intermediate static slot if changes occur, to obtain the optimized dynamic slot and the optimized static slot, and to continue to adjust the resident power points of the optimized dynamic slot and the optimized static slot according to the photovoltaic prediction curve and the preset control strategy, and to operate according to the adjusted final dynamic slot and the final static slot.

[0116] The electrolyzer cluster control device provided in this application embodiment solves the contradiction between the stable operation of the electrolyzer and the demand for hydrogen production under photovoltaic fluctuations, minimizing the aging cost of the equipment while ensuring downstream production requirements.

[0117] This disclosure also provides a computer device, which includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the steps of the electrolytic cell cluster control method described in Embodiment 1, which will not be repeated here.

[0118] This disclosure also provides a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, it implements the steps of the electrolytic cell cluster control method described in Embodiment 1, which will not be repeated here.

[0119] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can also be implemented in other ways. The apparatus embodiments described above are merely illustrative; for example, the flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods, and computer program products according to various embodiments of the present invention. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that, as an alternative implementation, the functions marked in the blocks may occur in a different order than those marked in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagram and / or flowchart, and combinations of blocks in the block diagram and / or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

[0120] In addition, the functional modules or units in the various embodiments of the present invention can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0121] If the aforementioned functions are implemented as software functional modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, 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 smartphone, personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this invention. The aforementioned storage medium can be a non-volatile storage medium or a volatile storage medium. For example, the storage medium can be a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, or any other medium capable of storing program code.

[0122] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for controlling an electrolytic cell cluster, characterized in that, The method includes: The rotation status of each electrolytic cell in the current cycle is determined based on the performance parameters of each electrolytic cell, thus obtaining the initial dynamic cell, the initial static cell, and the initial start-stop cell. The constant power points of the initial dynamic tank and the initial static tank are determined, the photovoltaic prediction curve is obtained, the constant power points of the initial dynamic tank and the initial static tank are adjusted according to the photovoltaic prediction curve and the preset control strategy, and the intermediate dynamic tank and the intermediate static tank are operated according to the adjusted control strategy. Update the aging status of the intermediate dynamic tank and the intermediate static tank, and determine whether the relative relationship between the aging status of the intermediate dynamic tank and the intermediate static tank has changed; If any changes occur, the rotation status of the intermediate dynamic slot and the intermediate static slot is updated to obtain the optimized dynamic slot and the optimized static slot. The resident power points of the optimized dynamic slot and the optimized static slot are then adjusted according to the photovoltaic prediction curve and the preset control strategy, and the slots are operated according to the adjusted final dynamic slot and final static slot.

2. The electrolytic cell cluster control method according to claim 1, characterized in that, The step of determining the initial rotation state of each electrolytic cell in the current cycle based on the performance parameters of each electrolytic cell, and obtaining the initial dynamic cell and the initial static cell, includes: Obtain the performance parameters of each electrolytic cell, including its health status and expected aging degree; The electrolyzer that achieves a first preset threshold in both hydrogen production efficiency and hydrogen production quality under steady-state conditions is defined as the initial static cell. The electrolyzer that achieves a second preset threshold for hydrogen production efficiency and quality under dynamic conditions is defined as the initial dynamic cell.

3. The electrolytic cell cluster control method according to claim 1, characterized in that, The step of adjusting the resident power points of the initial dynamic tank and the initial static tank according to the photovoltaic prediction curve and the preset control strategy includes: Based on the direction and extent of photovoltaic source fluctuations in the photovoltaic prediction curve, and using a preset control strategy, the resident power points of the initial dynamic grid, the initial static grid, and the initial start-stop grid are adjusted under emergency stop, loading, and unloading scenarios, respectively.

4. The electrolytic cell cluster control method according to claim 3, characterized in that, The adjustment of the resident power points of the initial dynamic slot, the initial static slot, and the initial start-stop slot under emergency stop, loading, and unloading scenarios includes: In an emergency stop scenario, it is determined whether the initial start-stop slot is activated. If the initial start-stop slot is activated, it is determined whether the initial dynamic slot is reduced to the first lower limit power. If the initial dynamic slot power decreases to the first lower limit, then determine whether the initial static slot power decreases to the second lower limit. If the initial static cell power drops to the second lower limit, it is determined whether the energy storage should start emergency power supply. If the energy storage should start emergency power supply, it is determined whether the emergency power supply duration of the energy storage has ended. If the emergency power supply duration of the energy storage has ended, all the electrolytic cells are shut down.

5. The electrolytic cell cluster control method according to claim 4, characterized in that, The adjustment of the resident power points of the initial dynamic slot, the initial static slot, and the initial start-stop slot under emergency stop, loading, and unloading scenarios, respectively, also includes: In a loading scenario, determine whether the initial static slot is at full power. If the initial static slot is at full power, then determine whether the initial dynamic slot is at full power. If the initial dynamic tank is at full power, then determine whether the initial start-stop tank is at full power. If the initial start-stop tank is at full power, then determine whether the energy storage has started leasing and consumption. If the energy storage is started for leased consumption, it is determined whether the leased consumption period of the energy storage has ended. If the leased consumption period of the energy storage has ended, each of the electrolytic cells is operated at the current power.

6. The electrolytic cell cluster control method according to claim 5, characterized in that, The adjustment of the resident power points of the initial dynamic slot, the initial static slot, and the initial start-stop slot under emergency stop, loading, and unloading scenarios, respectively, also includes: In a load reduction scenario, it is determined whether the initial dynamic slot has been reduced to the first lower limit power. If the initial dynamic slot has been reduced to the first lower limit power, it is determined whether the initial start-stop slot has been reduced to the third lower limit power. If the initial start-stop tank power is reduced to the third lower limit power, it is determined whether the energy storage has started leased power supply. If the energy storage has started leased power supply, it is determined whether the leased power supply duration of the energy storage has ended. If the leased power supply period of the energy storage ends, it is determined whether the initial static tank has been reduced to the second lower limit power. If the initial static tank has been reduced to the second lower limit power, it is determined whether the initial start-stop tank has been started. If the initial start-stop cell is activated, it is determined whether the current time period is during the sunset period. If the current time period is during the sunset period, each electrolytic cell is gradually shut down.

7. The electrolytic cell cluster control method according to claim 1, characterized in that, The updating of the aging state of the intermediate dynamic slot and the intermediate static slot includes: The ratio of the full-load hydrogen production standard volume to the rated standard volume of each intermediate dynamic tank and each intermediate static tank is monitored, and the ratio is used as the health status of the intermediate dynamic tank and the intermediate static tank, wherein the health status is inversely proportional to the aging state.

8. A cluster control device for electrolytic cells, characterized in that, The device includes: The determination module is used to determine the rotation status of each electrolytic cell in the current cycle based on the performance parameters of each electrolytic cell, and to obtain the initial dynamic cell, the initial static cell, and the initial start-stop cell; The first adjustment module is used to determine the resident power points of the initial dynamic tank and the initial static tank, obtain the photovoltaic prediction curve, adjust the resident power points of the initial dynamic tank and the initial static tank according to the photovoltaic prediction curve and the preset control strategy, and operate according to the adjusted intermediate dynamic tank and intermediate static tank. The update module is used to update the aging status of the intermediate dynamic slot and the intermediate static slot, and to determine whether the relative relationship between the aging status of the intermediate dynamic slot and the intermediate static slot has changed. The second adjustment module is used to update the rotation state of the intermediate dynamic slot and the intermediate static slot if changes occur, to obtain the optimized dynamic slot and the optimized static slot, and to continue to adjust the resident power points of the optimized dynamic slot and the optimized static slot according to the photovoltaic prediction curve and the preset control strategy, and to operate according to the adjusted final dynamic slot and final static slot.

9. A computer device, characterized in that, The method includes a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps of the electrolytic cell cluster control method according to any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the steps of the electrolytic cell cluster control method according to any one of claims 1-7.

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