Hydrogen production system and power distribution method, device and system thereof
By calculating the absorbable power and total input power of each electrolyzer in the hydrogen production station, and using a ratio allocation method, the problem of unreasonable power allocation of the electrolyzers was solved, thus realizing the efficient operation of the hydrogen production station and the full utilization of the hydrogen production capacity of each electrolyzer.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- STATE GRID JILIN ELECTRIC POWER COMPANY LIMITED
- Filing Date
- 2024-12-20
- Publication Date
- 2026-06-30
AI Technical Summary
In existing technologies, the power distribution of electrolyzers is unreasonable, resulting in some electrolyzers having excessive power while others have insufficient power, which cannot meet the needs of large-scale hydrogen production.
By determining the absorbable power and total input power of each electrolyzer in the hydrogen production plant, the allocable power is calculated, and the power is allocated according to the ratio of the absorbable power of each target electrolyzer to the sum of absorbable power, ensuring that the power allocation of each electrolyzer is closer to its actual absorbable power.
This ensures full utilization of the allocable power at hydrogen production plants, guaranteeing that the hydrogen production capacity of each electrolyzer is fully utilized, and reducing situations of power surplus and shortage.
Smart Images
Figure CN122303962A_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of hydrogen production technology, and in particular relates to a hydrogen production system and its power distribution method, apparatus and system. Background Technology
[0002] With the increasing prevalence of large-scale hydrogen production applications, making full use of hydrogen production site resources and flexibly controlling hydrogen production units can help reduce the production cost of green hydrogen and ensure the efficient operation of hydrogen production sites.
[0003] The power that an electrolyzer can absorb varies depending on its operating temperature or operating condition. If the power is allocated according to the existing power allocation method, it is easy to cause unreasonable power allocation among the electrolyzers, which makes it difficult to meet the needs of large-scale hydrogen production. Summary of the Invention
[0004] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a hydrogen production system and its power allocation method, apparatus, and system to reduce the situation where some electrolyzers in a hydrogen production plant are allocated excessive power while others are allocated insufficient power, thereby making full use of the allocable power of the hydrogen production plant and maximizing the hydrogen production capacity of each electrolyzer.
[0005] In a first aspect, this application provides a power distribution method for a hydrogen production system, comprising:
[0006] Determine the absorbable power of each electrolyzer in the hydrogen production station and the total input power of the hydrogen production station;
[0007] The allocable power is determined by the difference between the total input power and the allocated power. The allocated power is the sum of the absorbable power of the electrolytic cells whose actual power reaches the corresponding absorbable power.
[0008] Determine the ratio of the absorbable power of the target electrolyzer to the sum of the absorbable power of all target electrolyzers. The target electrolyzer is the electrolyzer in the hydrogen production station whose actual power has not reached the corresponding absorbable power.
[0009] The available power is allocated to each target electrolyzer based on the ratio.
[0010] According to the power allocation method of this application, power is allocated according to the ratio of the absorbable power of each target electrolyzer to the sum of the absorbable power of all target electrolyzers. That is, the greater the absorbable power of the target electrolyzer, the more power is allocated. This reduces the situation where some electrolyzers in the hydrogen production station are allocated excessive power while others are allocated insufficient power, so that the allocable power of the hydrogen production station is fully utilized and the hydrogen production capacity of each electrolyzer is fully utilized.
[0011] According to one embodiment of this application, the absorbable power of the electrolytic cell is determined in the following manner, including:
[0012] When the electrolytic cell is in the start-up or shutdown process, the actual operating power of the electrolytic cell is taken as the corresponding absorbable power.
[0013] According to one embodiment of this application, when the electrolytic cell is in the start-up or shutdown process, the actual operating power of the electrolytic cell is taken as the corresponding absorbable power, including:
[0014] When the electrolytic cell is in the start-up process, the first actual power change rate corresponding to the electrolytic cell is determined, and the product of the first actual power change rate and the current start-up time is taken as the absorbable power of the electrolytic cell.
[0015] When the electrolytic cell is in the shutdown process, the second actual power change rate corresponding to the electrolytic cell is determined, and the difference between the initial power of the electrolytic cell and the product of the second actual power change rate and the current shutdown duration is taken as the absorbable power of the electrolytic cell.
[0016] According to one embodiment of this application, before using the actual operating power of the electrolytic cell as the corresponding absorbable power during the start-up or shutdown process of the electrolytic cell, the method further includes:
[0017] During the period when the hydrogen power supply receives the start-up command and the output power is less than or equal to the first power threshold, the working state of the electrolyzer is determined to be the start-up process.
[0018] During the period when the hydrogen power source receives a shutdown command and its output power is greater than or equal to the second power threshold, the electrolyzer is determined to be in a shutdown process.
[0019] According to one embodiment of this application, the absorbable power of the electrolytic cell is determined in the following manner, including:
[0020] The operating temperature of the electrolytic cell is obtained when the cell is in operation.
[0021] The absorbable power of the electrolytic cell is determined based on the temperature-power curve and operating temperature of the electrolytic cell.
[0022] According to one embodiment of this application, allocating distributable power to each target electrolyzer based on a ratio includes:
[0023] The product of the allocable power and the ratio is used as the estimated allocable power of the target electrolyzer.
[0024] When the estimated allocated power is less than or equal to the absorbable power of the target electrolytic cell, the allocated power of the target electrolytic cell is determined as the estimated allocated power, and the estimated allocated power is allocated to the corresponding target electrolytic cell.
[0025] When the estimated allocated power is greater than the absorbable power of the target electrolytic cell, the allocated power of the target electrolytic cell is determined as the absorbable power of the target electrolytic cell, and the absorbable power of the target electrolytic cell is allocated to the corresponding target electrolytic cell.
[0026] Secondly, this application provides a hydrogen production system, which includes: multiple hydrogen production power sources, multiple electrolyzers, and a controller. The electrolyzers are connected to the hydrogen production power sources in a one-to-one correspondence, and the controller is connected to each hydrogen production power source and electrolyzer. The controller is configured to execute the aforementioned power distribution method.
[0027] According to the hydrogen production system of this application, power is allocated according to the ratio of the absorbable power of each target electrolyzer to the sum of the absorbable power of all target electrolyzers. That is, the greater the absorbable power of the target electrolyzer, the more power is allocated. This reduces the situation where some electrolyzers in the hydrogen production station are allocated excessive power while others are allocated insufficient power, so that the allocable power of the hydrogen production station is fully utilized and the hydrogen production capacity of each electrolyzer is fully utilized.
[0028] Thirdly, this application provides a power distribution device, which includes:
[0029] The first determining module is used to determine the absorbable power of each electrolyzer in the hydrogen production station and the allocable power of the hydrogen production station.
[0030] The second determining module is used to determine the ratio of the absorbable power of each target electrolytic cell to the sum of the absorbable power of each target electrolytic cell;
[0031] The control module is used to distribute the available power to each target electrolyzer according to the ratio.
[0032] According to the power distribution device of this application, power is distributed according to the ratio of the absorbable power of each target electrolyzer to the sum of the absorbable power of each target electrolyzer. That is, the greater the absorbable power of the target electrolyzer, the more power is allocated. This reduces the situation where some electrolyzers in the hydrogen production station are allocated excessive power while others are allocated insufficient power, so that the allocable power of the hydrogen production station is fully utilized and the hydrogen production capacity of each electrolyzer is fully utilized.
[0033] Fourthly, this application provides a power distribution system, which includes one or more processors and a memory, the memory storing a computer program, which, when executed by the processor, implements the aforementioned power distribution method.
[0034] According to the power allocation system of this application, power is allocated according to the ratio of the absorbable power of each target electrolyzer to the sum of the absorbable power of all target electrolyzers. That is, the greater the absorbable power of the target electrolyzer, the more power is allocated. This reduces the situation where some electrolyzers in the hydrogen production station are allocated excessive power while others are allocated insufficient power, so that the allocable power of the hydrogen production station is fully utilized and the hydrogen production capacity of each electrolyzer is fully utilized.
[0035] Fifthly, this application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the aforementioned power allocation method.
[0036] According to the computer-readable storage medium of this application, when the computer program stored thereon is executed, power is allocated according to the ratio of the absorbable power of each target electrolyzer to the sum of the absorbable power of each target electrolyzer. That is, the greater the absorbable power of the target electrolyzer, the more power is allocated. This reduces the situation where some electrolyzers in the hydrogen production plant are allocated excessive power while others are allocated insufficient power, so that the allocable power of the hydrogen production plant is fully utilized and the hydrogen production capacity of each electrolyzer is fully utilized.
[0037] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description
[0038] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:
[0039] Figure 1 This is a schematic diagram of the hydrogen production system provided in the embodiments of this application;
[0040] Figure 2 This is one of the flowcharts of the power distribution method for the hydrogen production system provided in the embodiments of this application;
[0041] Figure 3 This is the second flowchart of the power distribution method for the hydrogen production system provided in the embodiments of this application;
[0042] Figure 4 This is the third flowchart of the power distribution method for the hydrogen production system provided in the embodiments of this application;
[0043] Figure 5 This is the fourth flowchart of the power distribution method for the hydrogen production system provided in the embodiments of this application;
[0044] Figure 6 This is a structural block diagram of the power distribution device provided in the embodiments of this application;
[0045] Figure 7 This is a structural block diagram of the power distribution system provided in the embodiments of this application.
[0046] Figure label:
[0047] Controller 10, hydrogen production power supply 20, electrolyzer 30, power distribution device 100, first determination module 110, second determination module 120, control module 130, power distribution system 200, processor 210, memory 220. Detailed Implementation
[0048] The embodiments of this application 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 this application, and should not be construed as limiting this application.
[0049] In the following description, a "circuit" refers to a conductive loop consisting of at least one element or sub-circuit connected by an electrical or electromagnetic link. When an element or circuit is said to be "coupled to" or "connected to" another element, or when an element / circuit is said to be "coupled at" or "connected at" two nodes, it can be directly coupled to or connected to the other element, or there may be intermediate elements. The connection between elements can be physical, logical, or a combination thereof. Conversely, when an element is said to be "directly coupled to" or "directly connected to" another element, it means that there are no intermediate elements between them.
[0050] In the description, the terms "first," "second," etc., are used to distinguish similar objects, not to describe a specific order or sequence. It should be understood that such numerical descriptors can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class, not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.
[0051] Furthermore, the use of terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicates that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0052] With the increasing prevalence of large-scale hydrogen production applications, making full use of hydrogen production site resources and flexibly controlling hydrogen production units can help reduce the production cost of green hydrogen and ensure the efficient operation of hydrogen production sites.
[0053] During hydrogen production, the temperature of the online electrolyzer varies depending on its operating time and initial state. Before reaching the rated temperature, the lower the electrolyzer temperature, the lower the power it can absorb. Furthermore, after receiving the start-up command, the electrolyzer's absorbable power gradually increases from zero over a period of time.
[0054] In related technologies, the total input power of a hydrogen production station is typically allocated on an average basis. For example, a hydrogen production station includes three operational electrolyzers with capacities of 20kW, 30kW, and 50kW respectively. The total input power of the station is 120kW. If allocated equally, each electrolyzer receives 40kW, resulting in the first and second electrolyzers receiving more power than their capacities. This excess power is fed into the grid, increasing the power consumption at the grid connection point. Conversely, the third electrolyzer receives less power than its capacities, wasting hydrogen production capacity and failing to fully utilize the station's total input power.
[0055] Reference Figure 1 , Figure 1 The structure of a hydrogen production system is shown. To more clearly illustrate the control process of the power distribution method in this application, an embodiment of this application proposes a hydrogen production system. In this embodiment, the hydrogen production system includes multiple hydrogen production power sources 20, multiple electrolyzers 30, and a controller 10. Each electrolyzer 30 is connected to a hydrogen production power source 20 in a one-to-one correspondence, and the controller 10 is connected to each hydrogen production power source 20 and each electrolyzer 30. During the hydrogen production process, the controller 10 is mainly used to distribute the total input power of the hydrogen production station to the hydrogen production power source 20 corresponding to each operational electrolyzer 30, so that the electrolyzers 30 can perform water electrolysis to produce hydrogen.
[0056] Reference Figure 2 , Figure 2 The flowchart illustrates a power allocation method for a hydrogen production system provided in an embodiment of this application. One embodiment of this application proposes a power allocation method for a hydrogen production system, including steps 10, 20, 30, and 40.
[0057] Step 10: Determine the absorbable power of each electrolyzer 30 in the hydrogen production station and the total input power of the hydrogen production station;
[0058] Step 20: Determine the allocable power based on the difference between the total input power and the allocated power. The allocated power is the sum of the absorbable power of the electrolytic cell 30 when the actual power reaches the corresponding absorbable power.
[0059] Step 30: Determine the ratio of the absorbable power of the target electrolyzer to the sum of the absorbable power of all target electrolyzers. The target electrolyzer is the electrolyzer 30 in the hydrogen production station whose actual power has not reached the corresponding absorbable power.
[0060] Step 40: Distribute the available power to each target electrolytic cell according to the ratio.
[0061] The power allocation method for the hydrogen production system provided in this application can be executed by the controller 10 in the aforementioned hydrogen production system, or by a functional module or entity within the controller 10 capable of implementing the power allocation method. The power allocation method provided in this application will be described below using the controller 10 as an example.
[0062] The absorbable power of the electrolyzer 30 refers to the maximum power that the electrolyzer 30 can stably and efficiently consume and convert into useful chemical energy or thermal energy under specific conditions. The absorbable power of the electrolyzer 30 is affected by factors such as its own structure, materials, and design, as well as by external environmental conditions such as electrolyte concentration, temperature, and electrode materials.
[0063] The total input power of a hydrogen production station can come from the electrical energy converted from the heat energy generated by burning coal, or from the conversion of solar energy into electrical energy by photovoltaic cells.
[0064] During operation, some electrolyzers 30 within a hydrogen production plant will operate at their absorbable power. The sum of the absorbable power of all electrolyzers 30 operating at absorbable power is the allocated power. Allocated power refers to the difference between the total input power of the hydrogen production plant and the allocated power. In other words, the power allocation method for the hydrogen production system provided in this application embodiment is mainly used to allocate power to electrolyzers 30 that have not reached their absorbable power.
[0065] The target electrolyzer is the electrolyzer within the hydrogen production plant whose actual power output has not reached the corresponding absorbable power. The ratio of the absorbable power of the target electrolyzer to the sum of the absorbable power of all target electrolyzers is calculated, primarily to determine the proportion of allocated power to the total available power for each target electrolyzer.
[0066] As an example, the hydrogen production station includes five electrolyzers 30 in operation, with each electrolyzer 30 having a power capacity of 20KW, 20KW, 30KW, 30KW, and 50KW respectively. The total input power of the hydrogen production station is 140KW. The actual operating power of the first and second electrolyzers 30 reaches their power capacity, while the actual operating power of the third, fourth, and fifth electrolyzers 30 does not reach their power capacity. The allocable power of the hydrogen production station is 140KW - 20KW - 20KW = 100KW. The third, fourth, and fifth electrolyzers are the target electrolyzers, and the sum of the power that each target electrolyzer can absorb is 30KW + 30KW + 50KW = 110KW. Therefore, the proportion of the allocable power of the third electrolyzer 30 to the total allocable power is 3 / 11, the proportion of the allocable power of the fourth electrolyzer 30 to the total allocable power is 3 / 11, and the proportion of the allocable power of the fifth electrolyzer 30 to the total allocable power is 5 / 11.
[0067] The available power is allocated to each target electrolyzer based on the ratio. That is, the greater the power that the target electrolyzer can absorb, the more power is allocated. This can realize the on-demand allocation of available power, so that the available power of the hydrogen production plant can be fully utilized.
[0068] According to the power allocation method of this application, power is allocated according to the ratio of the absorbable power of each target electrolyzer to the sum of the absorbable power of each target electrolyzer. That is, the greater the absorbable power of the target electrolyzer, the more power is allocated. This reduces the situation where some electrolyzers 30 in the hydrogen production station are allocated excessive power while others are allocated insufficient power, so that the allocable power of the hydrogen production station is fully utilized and the hydrogen production capacity of each electrolyzer 30 is fully utilized.
[0069] In some embodiments, the absorbable power of the electrolytic cell 30 is determined in the following manner, including: when the electrolytic cell 30 is in the start-up process or the shutdown process, the actual operating power of the electrolytic cell 30 is taken as the corresponding absorbable power.
[0070] During the start-up process, the actual operating power of the electrolyzer 30 gradually increases from zero. Each electrolyzer 30 can be equipped with a corresponding hydrogen production power source 20. The start-up process of the electrolyzer 30 refers to the stage from when the hydrogen production power source 20 receives the start-up command to when the actual operating power of the electrolyzer 30 reaches the first power threshold. The specific value of the first power threshold can be determined according to the actual application scenario and is not limited here.
[0071] When electrolyzer 30 is in the shutdown process, its actual operating power gradually decreases from the operating power at the time the shutdown command is received. The shutdown process of electrolyzer 30 refers to the period from when the hydrogen production power source 20 receives the shutdown command until the actual operating power of electrolyzer 30 decreases to a second power threshold. The second power threshold can be zero.
[0072] When the electrolytic cell 30 is in the start-up or shutdown process, taking the actual operating power of the electrolytic cell 30 as the corresponding absorbable power can make the power allocated to each electrolytic cell 30 closer to its actual absorbable power.
[0073] In some embodiments, when the electrolytic cell 30 is in the start-up or shutdown process, the actual operating power of the electrolytic cell 30 is taken as the corresponding absorbable power, including: when the electrolytic cell 30 is in the start-up process, determining the first actual power change rate corresponding to the electrolytic cell 30; and taking the product of the first actual power change rate and the current start-up duration as the absorbable power of the electrolytic cell 30.
[0074] The first actual power change rate refers to the slope of the power change curve of electrolytic cell 30 over time during startup.
[0075] When the hydrogen production power source 20 receives the start-up command, the actual operating power of the electrolyzer 30 is zero. During the start-up process, the absorbable power of the electrolyzer 30 can be calculated as the product of the first actual power change rate and the current operating time. The current operating time refers to the time elapsed from when the hydrogen production power source 20 receives the start-up command to when the absorbable power is calculated.
[0076] As an example, when the electrolyzer 30 is in the start-up process, the first actual power change rate of the electrolyzer 30 is 2KW / s. The absorbable power of the electrolyzer 30 is calculated 5 seconds after the hydrogen power supply 20 receives the start-up command. That is, the absorbable power of the electrolyzer 30 in the 5th second is 2KW / s*5s=10KW.
[0077] In other embodiments, the absorbable power of the electrolytic cell 30 at a reference time is known. The absorbable power of the electrolytic cell 30 can be calculated by the sum of the product of the first actual power change rate and the first reference start-up duration and the first reference absorbable power of the electrolytic cell 30. The first reference start-up duration refers to the time elapsed from the reference time to the time from which the absorbable power is calculated.
[0078] As an example, when the electrolyzer 30 is in the start-up process, the first actual power change rate of the electrolyzer 30 is 2KW / s. After receiving the start-up command, the first reference absorbable power of the electrolyzer 30 in the 5th second is 10KW. Then, the absorbable power of the electrolyzer 30 in the 6th second after the hydrogen power source 20 receives the start-up command is 10KW + 2KW / s * (6s - 5s) = 12KW.
[0079] In some embodiments, when the electrolytic cell 30 is in the start-up or shutdown process, the actual operating power of the electrolytic cell 30 is taken as the corresponding absorbable power, including: when the electrolytic cell 30 is in the shutdown process, determining the second actual power change rate corresponding to the electrolytic cell 30; and taking the difference between the initial power of the electrolytic cell 30 and the product of the second actual power change rate and the current shutdown duration as the absorbable power of the electrolytic cell 30.
[0080] The second actual power change rate refers to the slope of the power change curve of electrolytic cell 30 over time during the shutdown process.
[0081] After the hydrogen production power source 20 receives the shutdown command, the actual operating power of the electrolyzer 30 gradually decreases, and the corresponding absorbable power also gradually decreases. When the electrolyzer 30 is in the shutdown process, the absorbable power of the electrolyzer 30 can be the difference between the initial power and the product of the second actual power change rate and the current shutdown duration. The current shutdown duration refers to the time elapsed from when the hydrogen production power source 20 receives the shutdown command to when the absorbable power is calculated.
[0082] As an example, when the electrolyzer 30 is in the shutdown process, the second actual power change rate of the electrolyzer 30 is 3KW / s. When the shutdown command is received, the absorbable power of the electrolyzer 30 is 20KW. Then, the absorbable power of the electrolyzer 30 5s after the hydrogen power source 20 receives the shutdown command is 10KW-3KW / s*5s=5KW.
[0083] In some embodiments, before taking the actual operating power of the electrolyzer 30 as the corresponding absorbable power when the electrolyzer 30 is in the start-up or shutdown process, the method further includes: determining the working state of the electrolyzer 30 as the start-up process during the stage when the hydrogen power supply 20 receives the start-up command and the output power is less than or equal to a first power threshold; and determining the working state of the electrolyzer 30 as the shutdown process during the stage when the hydrogen power supply 20 receives the shutdown command and the output power is greater than or equal to a second power threshold.
[0084] When the allocated power of each electrolytic cell 30 calculated according to the aforementioned allocation method is greater than or equal to the absorbable power of the electrolytic cell 30, the first power threshold is the absorbable power of the electrolytic cell 30; if the calculated allocated power is less than the absorbable power of the electrolytic cell 30, the first power threshold is the calculated allocated power.
[0085] In some embodiments, the absorbable power of the electrolytic cell 30 is determined by the following method: when the electrolytic cell 30 is in operation, the operating temperature of the electrolytic cell 30 is obtained; and the absorbable power of the electrolytic cell 30 is determined based on the temperature-power curve corresponding to the electrolytic cell 30 and the operating temperature.
[0086] The temperature-power curve of the electrolytic cell 30 refers to the relationship between the absorbable power of the electrolytic cell 30 and the temperature during normal operation.
[0087] A temperature sensor may be installed inside the electrolytic cell 30. The temperature sensor measures the temperature of the electrolytic cell 30 in real time and transmits the detected temperature to the controller 10. The controller 10 stores the temperature-power curve of the electrolytic cell 30. When the electrolytic cell 30 is in operation, the controller 10 can determine the absorbable power of the electrolytic cell 30 based on the acquired temperature of the electrolytic cell 30.
[0088] The corresponding absorbable power is determined based on the temperature of the electrolyzer 30 in operation, and power is allocated according to the determined absorbable power. Electrolyzers 30 with higher temperatures usually have higher absorbable power, thus allowing for the allocation of more power. This enables on-demand allocation of input power to the hydrogen production station, reducing situations where some electrolyzers 30 receive excessive power while others receive insufficient power. This ensures that the allocable power of the hydrogen production station is fully utilized, and that the hydrogen production capacity of each electrolyzer 30 is fully realized.
[0089] Reference Figure 3 , Figure 3 The flowchart illustrates a power allocation method for a hydrogen production system provided in an embodiment of this application. In some embodiments, the available power is allocated to each target electrolyzer according to a ratio, including steps 41, 42, and 43.
[0090] Step 41: The product of the allocable power and the ratio is used as the estimated allocable power of the target electrolyzer;
[0091] Step 42: When the estimated allocated power is less than or equal to the absorbable power of the target electrolytic cell, the allocated power of the target electrolytic cell is determined as the estimated allocated power.
[0092] Step 43: Allocate the estimated power to the corresponding target electrolytic cell.
[0093] The ratio refers to the ratio of the absorbable power of the target electrolyzer to the sum of the absorbable power of all target electrolyzers. The estimated allocated power refers to the power value calculated based on the allocated power and the ratio. When the estimated allocated power is less than or equal to the absorbable power of the target electrolyzer, the allocated power of the target electrolyzer is determined as the estimated allocated power. In this case, although the allocated power does not reach the absorbable power of the corresponding electrolyzer 30, allocating the allocated power of the hydrogen production station as needed ensures that the allocated power of the hydrogen production station is fully utilized.
[0094] As an example, a hydrogen production station includes three electrolyzers 30 that are in operation but have not yet reached their maximum absorbable power. The absorbable power of each electrolyzer 30 is 20KW, 30KW, and 50KW, respectively, and the station's total allocable power is 90KW. The ratio of the absorbable power of the third electrolyzer 30 to the sum of the absorbable power of all target electrolyzers is 50 / (20+30+50) = 1 / 2. Therefore, the estimated allocated power of the third electrolyzer 30 is 90KW * 1 / 2 = 45KW. Since the estimated allocated power of the third electrolyzer 30 is less than its absorbable power, 45KW of power will be allocated to the third electrolyzer 30.
[0095] Reference Figure 4 , Figure 4 The flowchart illustrates a power allocation method for a hydrogen production system provided in an embodiment of this application. In some embodiments, after multiplying the allocable power by the ratio as the estimated allocated power of the target electrolyzer, steps 44 and 45 are further included.
[0096] Step 44: When the estimated allocated power is greater than the absorbable power of the target electrolytic cell, determine the allocated power of the target electrolytic cell as the absorbable power of the target electrolytic cell.
[0097] Step 45: Distribute the absorbable power of the target electrolytic cell to the corresponding target electrolytic cell.
[0098] When the estimated allocated power is greater than the absorbable power of the target electrolyzer, the allocated power of the target electrolyzer is determined to be the absorbable power of the target electrolyzer. This ensures that the power allocated to the electrolyzer 30 does not exceed its absorbable power, reducing the possibility of the electrolyzer 30 uploading excess power to the power grid.
[0099] As an example, a hydrogen production station includes three electrolyzers 30 that are in operation but have not yet reached their maximum absorbable power. The absorbable power of each electrolyzer 30 is 20KW, 30KW, and 50KW, respectively, and the station's total allocable power is 120KW. The ratio of the absorbable power of the third electrolyzer 30 to the sum of the absorbable power of all target electrolyzers is 50 / (20+30+50) = 1 / 2. Therefore, the estimated allocated power of the third electrolyzer 30 is 120KW * 1 / 2 = 60KW. Since the estimated allocated power of the third electrolyzer 30 is less than its absorbable power, 50KW of power will be allocated to the third electrolyzer 30.
[0100] Reference Figure 5 , Figure 5 The flowchart of the power allocation method for a hydrogen production system provided in this application embodiment is shown. The power allocation method of this application can be summarized as follows: obtain the absorbable power Pcom of each target electrolyzer and the allocatable power Pin of the hydrogen production station. The power allocated to the i-th target electrolyzer is P[i], and the absorbable power of the i-th target electrolyzer is Pcom[i]. Then the absorbable power of the target electrolyzer is: Pcom[1] + Pcom[2] + ... + Pcom[N]. Then the estimated allocated power of the i-th target electrolyzer is: P[i] = Pin * Pcom[i] / Pcom[1] + Pcom[2] + ... + Pcom[N]. When the estimated allocated power is greater than the absorbable power of the target electrolyzer, the absorbable power of the target electrolyzer is allocated to the corresponding target electrolyzer; when the estimated allocated power is greater than the absorbable power of the target electrolyzer, the absorbable power of the target electrolyzer is allocated to the corresponding target electrolyzer. After allocating the available power to the i-th target electrolytic cell according to the above calculation results, the available power is reduced by the power allocated to the i-th target electrolytic cell, and then the remaining target electrolytic cells are allocated in the same manner.
[0101] Reference Figure 6 , Figure 6 The structure of a power distribution device 100 provided in an embodiment of this application is shown. One embodiment of this application proposes a power distribution device 100, which includes: a first determining module 110, a second determining module 120, and a control module 130. The first determining module 110 is used to determine the absorbable power of each electrolyzer 30 in the hydrogen production station and the distributable power of the hydrogen production station; the second determining module 120 is used to determine the ratio of the absorbable power of each target electrolyzer to the sum of the absorbable power of all target electrolyzers; the control module 130 is used to distribute the distributable power to each target electrolyzer according to the ratio.
[0102] The first determining module 110 is mainly used to determine the absorbable power of each electrolyzer 30 in the hydrogen production station and the allocable power of the hydrogen production station. Among them, for electrolyzers 30 that are in the start-up or shutdown state, their absorbable power is the actual operating power; for electrolyzers 30 that are in the operating state, their absorbable power can be determined according to the temperature-power curve.
[0103] The second determining module 120 is mainly used to determine the ratio of the absorbable power of each target electrolyzer to the sum of the absorbable power of each target electrolyzer, so as to facilitate the allocation of the distributable power according to the ratio, realize the on-demand allocation of the distributable power, and make full use of the distributable power of the hydrogen production station.
[0104] The control module 130 can calculate the estimated power allocation for each target electrolytic cell based on the ratio and the available power. When the estimated power allocation is less than or equal to the absorbable power of the target electrolytic cell, the estimated power allocation is allocated to the corresponding target electrolytic cell. When the estimated power allocation is greater than the absorbable power of the target electrolytic cell, the absorbable power of the target electrolytic cell is allocated to the corresponding target electrolytic cell.
[0105] It should be noted that the explanation of the power distribution method in the foregoing embodiments also applies to the power distribution device 100 of the embodiments of this application, and will not be elaborated here.
[0106] According to the power distribution device 100 of this application, power is distributed according to the ratio of the absorbable power of each target electrolyzer to the sum of the absorbable power of each target electrolyzer. That is, the greater the absorbable power of the target electrolyzer, the more power is allocated. This reduces the situation where some electrolyzers 30 in the hydrogen production station are allocated excessive power while others are allocated insufficient power, so that the allocable power of the hydrogen production station is fully utilized and the hydrogen production capacity of each electrolyzer 30 is fully utilized.
[0107] Reference Figure 7 , Figure 7 The structure of a power distribution system 200 provided in an embodiment of this application is shown. One embodiment of this application proposes a power distribution system 200, which includes one or more processors 210 and a memory 220. The memory 220 stores a computer program, which, when executed by the processor 210, implements the aforementioned power distribution method.
[0108] For example, when a computer program is executed by processor 210, the following power allocation method is implemented:
[0109] Step 10: Determine the absorbable power of each electrolyzer 30 in the hydrogen production station and the total input power of the hydrogen production station;
[0110] Step 20: Determine the allocable power based on the difference between the total input power and the allocated power. The allocated power is the sum of the absorbable power of the electrolytic cell 30 when the actual power reaches the corresponding absorbable power.
[0111] Step 30: Determine the ratio of the absorbable power of the target electrolyzer to the sum of the absorbable power of all target electrolyzers. The target electrolyzer is the electrolyzer 30 in the hydrogen production station whose actual power has not reached the corresponding absorbable power.
[0112] Step 40: Distribute the available power to each target electrolytic cell according to the ratio.
[0113] For example, when a computer program is executed by processor 210, the following power allocation method is implemented:
[0114] Step 41: The product of the allocable power and the ratio is used as the estimated allocable power of the target electrolyzer;
[0115] Step 42: When the estimated allocated power is less than or equal to the absorbable power of the target electrolytic cell, the allocated power of the target electrolytic cell is determined as the estimated allocated power.
[0116] Step 43: Allocate the estimated power to the corresponding target electrolytic cell.
[0117] For example, when a computer program is executed by processor 210, the following power allocation method is implemented:
[0118] Step 44: When the estimated allocated power is greater than the absorbable power of the target electrolytic cell, determine the allocated power of the target electrolytic cell as the absorbable power of the target electrolytic cell.
[0119] Step 45: Distribute the absorbable power of the target electrolytic cell to the corresponding target electrolytic cell.
[0120] It should be noted that the explanation of the power distribution method in the foregoing embodiments also applies to the power distribution system 200 of the embodiments of this application, and will not be elaborated here.
[0121] According to the power distribution system 200 of this application, power is distributed according to the ratio of the absorbable power of each target electrolyzer to the sum of the absorbable power of each target electrolyzer. That is, the greater the absorbable power of the target electrolyzer, the more power is allocated. This reduces the situation where some electrolyzers 30 in the hydrogen production station are allocated excessive power while others are allocated insufficient power, so that the allocable power of the hydrogen production station is fully utilized and the hydrogen production capacity of each electrolyzer 30 is fully utilized.
[0122] One embodiment of this application proposes a computer-readable storage medium storing a computer program that, when executed by a processor, implements the aforementioned power allocation method.
[0123] For example, when a computer program is executed by a processor, the following insulation detection method can be implemented:
[0124] Step 10: Obtain the voltage dataset of the insulated bridge arm circuit in multiple stages within a single-sided detection cycle;
[0125] Step 20: Determine the confidence level corresponding to each voltage dataset;
[0126] Step 30: Determine the target voltage dataset that meets the confidence criteria based on the confidence level and the voltage dataset;
[0127] Step 40: Calculate the insulation resistance value based on the target voltage dataset.
[0128] For example, when a computer program is executed by a processor, the following power allocation method is implemented:
[0129] Step 41: The product of the allocable power and the ratio is used as the estimated allocable power of the target electrolyzer;
[0130] Step 42: When the estimated allocated power is less than or equal to the absorbable power of the target electrolytic cell, the allocated power of the target electrolytic cell is determined as the estimated allocated power.
[0131] Step 43: Allocate the estimated power to the corresponding target electrolytic cell.
[0132] For example, when a computer program is executed by a processor, the following power allocation method is implemented:
[0133] Step 44: When the estimated allocated power is greater than the absorbable power of the target electrolytic cell, determine the allocated power of the target electrolytic cell as the absorbable power of the target electrolytic cell.
[0134] Step 45: Distribute the absorbable power of the target electrolytic cell to the corresponding target electrolytic cell.
[0135] It should be noted that the explanation of the power allocation method in the foregoing embodiments also applies to the computer-readable storage medium of the embodiments of this application, and will not be elaborated here.
[0136] According to the computer-readable storage medium of this application, when the computer program stored thereon is executed, power is allocated according to the ratio of the absorbable power of each target electrolyzer to the sum of the absorbable power of each target electrolyzer. That is, the greater the absorbable power of the target electrolyzer, the more power is allocated. This reduces the situation where some electrolyzers 30 in the hydrogen production station are allocated excessive power while others are allocated insufficient power, so that the allocable power of the hydrogen production station is fully utilized and the hydrogen production capacity of each electrolyzer 30 is fully utilized.
[0137] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.
Claims
1. A power distribution method for a hydrogen production system, characterized in that, include: Determine the absorbable power of each electrolyzer in the hydrogen production station and the total input power of the hydrogen production station; The allocable power is determined based on the difference between the total input power and the allocated power, wherein the allocated power is the sum of the absorbable power of the electrolytic cells whose actual power reaches the corresponding absorbable power. Determine the ratio of the absorbable power of the target electrolyzer to the sum of the absorbable power of each target electrolyzer, wherein the target electrolyzer is the electrolyzer in the hydrogen production station whose actual power has not reached the corresponding absorbable power; The available power is allocated to each of the target electrolytic cells according to the ratio.
2. The power distribution method of claim 1, wherein, The absorbable power of the electrolytic cell is determined according to the following methods, including: When the electrolytic cell is in the start-up or shutdown process, the actual operating power of the electrolytic cell is taken as the corresponding absorbable power.
3. The power distribution method according to claim 2, characterized in that, The step of using the actual operating power of the electrolytic cell as the corresponding absorbable power during the start-up or shutdown process includes: When the electrolytic cell is in the start-up process, the first actual power change rate corresponding to the electrolytic cell is determined and the product of the first actual power change rate and the current start-up time is taken as the absorbable power of the electrolytic cell. When the electrolytic cell is in the shutdown process, the second actual power change rate corresponding to the electrolytic cell is determined, and the difference between the initial power of the electrolytic cell and the product of the second actual power change rate and the current shutdown duration is taken as the absorbable power of the electrolytic cell.
4. The power distribution method according to claim 2, characterized in that, Before using the actual operating power of the electrolytic cell as the corresponding absorbable power during the start-up or shutdown process of the electrolytic cell, the method further includes: During the period when the hydrogen power supply receives the start-up command and the output power is less than or equal to the first power threshold, the working state of the electrolyzer is determined to be the start-up process; During the period when the hydrogen power source receives a shutdown command and its output power is greater than or equal to the second power threshold, the working state of the electrolyzer is determined to be the shutdown process.
5. The power distribution method according to claim 1, characterized in that, The absorbable power of the electrolytic cell is determined according to the following methods, including: When the electrolytic cell is in operation, the operating temperature of the electrolytic cell is obtained; The absorbable power of the electrolytic cell is determined based on the temperature-power curve corresponding to the electrolytic cell and the operating temperature.
6. The power allocation method according to any one of claims 1-5, wherein allocating the allocatable power to each of the target electrolytic cells according to the ratio comprises: The product of the allocable power and the ratio is taken as the estimated allocable power of the target electrolytic cell; When the estimated allocated power is less than or equal to the absorbable power of the target electrolytic cell, the allocated power of the target electrolytic cell is determined to be the estimated allocated power, and the estimated allocated power is allocated to the corresponding target electrolytic cell. When the estimated allocated power is greater than the absorbable power of the target electrolytic cell, the allocated power of the target electrolytic cell is determined to be the absorbable power of the target electrolytic cell; The absorbable power of the target electrolytic cell is allocated to the corresponding target electrolytic cell.
7. A hydrogen production system, characterized in that, include: The system includes multiple hydrogen production power sources, multiple electrolyzers, and a controller. Each electrolyzer is connected to a hydrogen production power source in a one-to-one correspondence. The controller is connected to each hydrogen production power source and each electrolyzer. The controller is configured to execute the power distribution method according to any one of claims 1-6.
8. A power distribution device, characterized in that, include: The first determining module is used to determine the absorbable power of each electrolyzer in the hydrogen production station and the distributable power of the hydrogen production station. The second determining module is used to determine the ratio of the absorbable power of each target electrolytic cell to the sum of the absorbable power of each target electrolytic cell; A control module is used to distribute the distributable power to each of the target electrolytic cells according to the ratio.
9. A power distribution system, characterized in that, include: It includes one or more processors and a memory, the memory storing a computer program that, when executed by the processor, implements the power distribution method according to any one of claims 1-6.
10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the power allocation method according to any one of claims 1-6.