A load regulation method and device for electrolytic hydrogen production

Abstract

The present invention relates to the technical field of electrolytic hydrogen production, and in particular to a load regulation method and device for electrolytic hydrogen production. The method is applied to a controller of an electrolytic hydrogen production system, wherein the electrolytic hydrogen production system includes a renewable energy power generation device, a power generation measuring device, and a plurality of electrolyzers. The renewable energy power generation device is respectively connected to the power generation measuring device and all electrolyzers, and all electrolyzers and the power generation measuring device are respectively connected to the controller. The method includes: obtaining the operating parameters of each electrolyzer in the current state and the power generation of the renewable energy power generation device in the current state measured by the power generation measuring device; based on the power generation and operating parameters, determining the target regulation power of each electrolyzer, so as to use the target regulation power to regulate the power of each corresponding electrolyzer. Therefore, the above scheme can realize the real-time load regulation of the electrolyzer load following the power generation.

Description

Technical Field

[0001] The present invention relates to the technical field of electrolytic hydrogen production, and in particular to a load regulation method and device for electrolytic hydrogen production. Background Art

[0002] Combining renewable energy power generation with electrolysis to produce hydrogen can realize the conversion of electricity into hydrogen for storage, transportation and utilization. Using hydrogen to replace traditional fuels based on fossil fuels such as coal and oil can achieve deep decarbonization in the fields of transportation, metallurgy, chemical industry, etc.

[0003] In the related art, the electrolytic hydrogen production technology adopts an operation mode in which the electrolyzer is always maintained at full load. However, the above operation mode cannot make the load of the electrolyzer adjust in real time according to the power generation power.

[0004] Therefore, there is an urgent need for a load regulation method and device for hydrogen production by electrolysis to solve this technical problem. Summary of the invention

[0005] The present invention provides a load regulation method and device for hydrogen production by electrolysis, which can achieve real-time load regulation of the electrolytic cell by following the generated power.

[0006] In a first aspect, an embodiment of the present specification provides a load regulation method for hydrogen production by electrolysis, which is applied to a controller of a hydrogen production system by electrolysis, wherein the hydrogen production system by electrolysis includes a renewable energy power generation device, a power generation power measurement device, and a plurality of electrolyzers, wherein the renewable energy power generation device is respectively connected to the power generation power measurement device and all the electrolyzers, and all the electrolyzers and the power generation power measurement device are respectively connected to the controller, and the method includes:

[0007] Acquire the operating parameters of each electrolytic cell in the current state and the power generation power of the renewable energy power generation device in the current state measured by the power generation power measurement device;

[0008] Based on the generated power and the operating parameters, a target regulated power of each electrolytic cell is determined, so that the target regulated power is used to perform power regulation on each corresponding electrolytic cell.

[0009] In the second aspect, the embodiment of this specification provides a load regulation device for hydrogen production by electrolysis, which is applied to a controller of a hydrogen production system by electrolysis, wherein the hydrogen production system by electrolysis includes a renewable energy power generation device, a power generation power measurement device, and a plurality of electrolyzers, wherein the renewable energy power generation device is respectively connected to the power generation power measurement device and all the electrolyzers, and all the electrolyzers and the power generation power measurement device are respectively connected to the controller, and the device includes:

[0010] An acquisition module, used to acquire the operating parameters of each electrolytic cell in the current state and the power generation power of the renewable energy power generation device in the current state measured by the power generation power measurement device;

[0011] A determination module is used to determine the target adjustment power of each electrolytic cell based on the generated power and the operating parameters, so as to use the target adjustment power to adjust the power of each corresponding electrolytic cell.

[0012] The embodiment of this specification provides a load regulation method and device for hydrogen production by electrolysis, firstly obtaining the operating parameters of each electrolyzer in the current state and the power generation of the renewable energy power generation device in the current state measured by the power generation measurement device, then determining the target regulation power of each electrolyzer based on the power generation and the operating parameters, and finally using the target regulation power to regulate the power of each corresponding electrolyzer. Therefore, the above scheme can achieve real-time load regulation of the electrolyzer load following the power generation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 A flow chart of a load regulation method for hydrogen production by electrolysis provided in an embodiment of the present invention;

[0015] Figure 2 It is a structural diagram of a load regulation device for producing hydrogen by electrolysis provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0017] Among the related technologies, most of the large-scale renewable energy hydrogen production projects are still heavily dependent on the regulation function of the large power grid. In order to improve the utilization rate of the hydrogen production equipment, the electrolyzer is always maintained in a full-load operation mode. However, this operation mode does not give full play to the advantages of the hydrogen production unit as a variable load and participate in smoothing the power supply volatility. It does not play a role in assisting the large-scale integration of photovoltaic power sources into the energy system. Instead, it has brought new pressure on the peak-shaving capacity of the power grid, thereby requiring more traditional power generation units such as thermal power to achieve power balance.

[0018] In order to promote the further development of large-scale renewable energy hydrogen production projects, a more active control strategy must be adopted for the hydrogen production system so that the hydrogen production load can be adjusted in real time with power generation, and the load of the hydrogen production system may increase or decrease significantly within minutes or even shorter time. This poses a challenge to the regulation of the hydrogen production system. Among them, although the electrolyzer has a certain load regulation capability, considering the stable operation of the entire hydrogen production process system, the adjustment speed of the electrolyzer needs to be limited; secondly, for safety reasons, the working load range of the alkaline electrolyzer is generally maintained between 30% and 100%.

[0019] In order to solve the above technical problems, the inventors creatively came up with the idea of ​​using a power generation measurement unit to measure the power of photovoltaic power generation in real time, and then using a controller to collect the power generation power transmitted by the power generation measurement unit and the operating parameter information transmitted by the electrolytic cell. After analysis, a load adjustment strategy for each electrolytic cell is formulated and sent to the electrolytic cell for execution.

[0020] See also Figure 1 An embodiment of the present invention provides a load regulation method for hydrogen production by electrolysis, which is applied to a controller of a hydrogen production system by electrolysis. The hydrogen production system by electrolysis includes a renewable energy power generation device, a power generation power measurement device, and a plurality of electrolyzers. The renewable energy power generation device is respectively connected to the power generation power measurement device and all the electrolyzers. All the electrolyzers and the power generation power measurement device are respectively connected to the controller. The method includes:

[0021] Step 100, obtaining the operating parameters of each electrolytic cell in the current state and the power generation power of the renewable energy power generation device in the current state measured by the power generation power measurement device;

[0022] Step 102: Determine the target adjustment power of each electrolytic cell based on the generated power and the operating parameters, so as to use the target adjustment power to adjust the power of each corresponding electrolytic cell.

[0023] In this embodiment, the operating parameters of each electrolytic cell in the current state and the power generation of the renewable energy power generation device in the current state measured by the power generation measurement device are first obtained, and then the target adjustment power of each electrolytic cell is determined based on the power generation and operating parameters, and finally the target adjustment power is used to adjust the power of each corresponding electrolytic cell. Therefore, the above scheme can achieve real-time load adjustment of the electrolytic cell load following the power generation.

[0024] In one embodiment of the present invention, the operating parameters include operating power, maximum load adjustment range, best energy efficiency power and maximum power.

[0025] In one embodiment of the present invention, step 102 may specifically include:

[0026] Determine the load regulation mode of each electrolytic cell based on the generated power and the operating power;

[0027] Under the determined load regulation mode, the target regulation power of each electrolytic cell is determined based on the maximum load regulation range, at least one of the best energy efficiency power and the maximum power, and the generated power.

[0028] In this embodiment, by utilizing the maximum load regulation amplitude, at least one of the best energy efficiency power and the maximum power and the generated power, the target regulation power of each electrolyzer can be better determined, while at the same time, the advantage of the hydrogen production equipment as a variable load in participating in smoothing power supply fluctuations can be better utilized.

[0029] In one embodiment of the present invention, the step of "determining the load adjustment mode of each electrolytic cell based on the generated power and the operating power" includes:

[0030] Calculate the total power difference between the generated power and the sum of the operating power of each electrolyzer;

[0031] If the total power difference is positive, the load regulation mode of each electrolytic cell is determined to be increasing the load;

[0032] If the total power difference is negative, the load regulation mode of each electrolytic cell is determined to reduce the load.

[0033] In this embodiment, the load regulation mode of each electrolyzer is determined by calculating the total power difference between the generated power and the sum of the operating power of each electrolyzer, so that each electrolyzer can achieve "load follows source", while reducing dependence on the large power grid and improving the utilization rate of the hydrogen production equipment.

[0034] In one embodiment of the present invention, when the load adjustment method is to increase the load, the step of "determining the target adjustment power of each electrolyzer based on the maximum load adjustment range, at least one of the best energy efficiency power and the maximum power and the generated power" includes:

[0035] Screen out target electrolyzers whose operating power is less than the optimal energy efficiency power;

[0036] Sort the difference between the optimal energy efficiency power and the operating power of each target electrolyzer in descending order to obtain a first allocation set;

[0037] Allocate the total power difference to each target electrolyzer in turn according to the order of the first allocation set and the preset first allocation principle, so that each target electrolyzer operates according to the allocated power; wherein the first allocation principle satisfies the following two conditions at the same time: the allocated power of each target electrolyzer is not greater than the optimal energy efficiency power, and the difference between the allocated power of each target electrolyzer and the power before allocation is not greater than the maximum load adjustment range;

[0038] If the total power difference has been completely allocated in the first allocation set, the allocated power of each target electrolytic cell is determined as the target adjustment power;

[0039] If the total power difference is not fully allocated in the first allocation set, execute:

[0040] Sort the current operating powers of all electrolytic cells in ascending order to obtain a second allocation set;

[0041] The remaining total power difference that has not been fully allocated in the first allocation set is allocated to each electrolytic cell in turn according to the order of the second allocation set and the preset second allocation principle; wherein the second allocation principle satisfies the following two conditions at the same time: the power allocated to each electrolytic cell is not greater than the maximum power, and the difference between the power of each electrolytic cell after the final allocation and the power before the first allocation is not greater than the maximum load adjustment range;

[0042] The final allocated power of each electrolytic cell is determined as the target regulated power.

[0043] In this embodiment, through the above method, each electrolyzer can adjust its workload in real time, and at the same time control each electrolyzer to operate at the optimal energy efficiency power, thereby improving the operating stability of the hydrogen production equipment.

[0044] In some implementations, it is easy to obtain a method for reducing the load by referring to the above method, which will not be described in detail here.

[0045] Therefore, according to the method proposed in this embodiment, it is ensured that the adjustment instructions do not exceed the adjustment capacity of the electrolyzer hardware equipment, and the adjustment rate is limited within the allowable range. Secondly, the "load follows source" of the hydrogen production system is realized, and the used electric power is kept consistent with the generated power. Under the above premise, the target adjustment power of each electrolyzer can also dynamically approach its own optimal energy efficiency power to maximize the hydrogen production.

[0046] like Figure 2 As shown, one embodiment of the present invention provides a load regulation device for electrolytic hydrogen production, which is applied to a controller of an electrolytic hydrogen production system. The electrolytic hydrogen production system includes a renewable energy power generation device, a power generation power measurement device, and a plurality of electrolyzers. The renewable energy power generation device is respectively connected to the power generation power measurement device and all electrolyzers. All electrolyzers and the power generation power measurement device are respectively connected to the controller. The device includes:

[0047] An acquisition module 200 is used to acquire the operating parameters of each electrolytic cell in the current state and the power generation of the renewable energy power generation device in the current state measured by the power generation measurement device;

[0048] The determination module 202 is used to determine the target adjustment power of each electrolytic cell based on the generated power and the operating parameters, so as to use the target adjustment power to adjust the power of each corresponding electrolytic cell.

[0049] In the embodiment of the present specification, the acquisition module 200 may be used to execute step 100 in the above method embodiment, and the determination module 202 may be used to execute step 102 in the above method embodiment.

[0050] In one embodiment of the present invention, the operating parameters include operating power, maximum load adjustment range, best energy efficiency power and maximum power.

[0051] In one embodiment of the present invention, the determination module 202 may be used to perform the following operations:

[0052] Determine the load regulation mode of each electrolytic cell based on the generated power and the operating power;

[0053] Under the determined load regulation mode, the target regulation power of each electrolytic cell is determined based on the maximum load regulation range, at least one of the best energy efficiency power and the maximum power, and the generated power.

[0054] In one embodiment of the present invention, when determining the load adjustment mode of each electrolytic cell based on the generated power and the operating power, the determination module 202 is used to perform the following operations:

[0055] Calculate the total power difference between the generated power and the sum of the operating power of each electrolyzer;

[0056] If the total power difference is positive, the load regulation mode of each electrolytic cell is determined to be increasing the load;

[0057] If the total power difference is negative, the load regulation mode of each electrolytic cell is determined to reduce the load.

[0058] In one embodiment of the present invention, when the load adjustment mode is to increase the load, the determination module 202 is used to perform the following operations when determining the target adjustment power of each electrolytic cell based on the maximum load adjustment range, at least one of the best energy efficiency power and the maximum power and the generated power:

[0059] Screen out target electrolyzers whose operating power is less than the optimal energy efficiency power;

[0060] Sort the difference between the optimal energy efficiency power and the operating power of each target electrolyzer in descending order to obtain a first allocation set;

[0061] Allocate the total power difference to each target electrolyzer in turn according to the order of the first allocation set and the preset first allocation principle, so that each target electrolyzer operates according to the allocated power; wherein the first allocation principle satisfies the following two conditions at the same time: the allocated power of each target electrolyzer is not greater than the optimal energy efficiency power, and the difference between the allocated power of each target electrolyzer and the power before allocation is not greater than the maximum load adjustment range;

[0062] If the total power difference has been completely allocated in the first allocation set, the allocated power of each target electrolytic cell is determined as the target adjustment power;

[0063] If the total power difference is not fully allocated in the first allocation set, execute:

[0064] Sort the current operating powers of all electrolytic cells in ascending order to obtain a second allocation set;

[0065] The remaining total power difference that has not been fully allocated in the first allocation set is allocated to each electrolytic cell in turn according to the order of the second allocation set and the preset second allocation principle; wherein the second allocation principle satisfies the following two conditions at the same time: the power allocated to each electrolytic cell is not greater than the maximum power, and the difference between the power of each electrolytic cell after the final allocation and the power before the first allocation is not greater than the maximum load adjustment range;

[0066] The final allocated power of each electrolytic cell is determined as the target regulated power.

[0067] Since the information interaction, execution process and other contents between the modules in the above-mentioned device are based on the same concept as the method embodiments of this specification, the specific contents can be found in the description of the method embodiments of this specification and will not be repeated here.

[0068] An embodiment of the present specification also provides an electronic device, including a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, a load regulation method for hydrogen production by electrolysis in any embodiment of the present specification is implemented.

[0069] The embodiments of the present specification also provide a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the processor executes a load regulation method for hydrogen production by electrolysis in any embodiment of the present specification.

[0070] Specifically, a system or device equipped with a storage medium can be provided, on which software program code that implements the functions of any of the above-mentioned embodiments is stored, and a computer (or CPU or MPU) of the system or device can be enabled to read and execute the program code stored in the storage medium.

[0071] In this case, the program code itself read from the storage medium can realize the function of any one of the above-mentioned embodiments, and thus the program code and the storage medium storing the program code constitute a part of the present invention.

[0072] The storage medium embodiments for providing the program code include a floppy disk, a hard disk, a magneto-optical disk, an optical disk (such as CD-ROM, CD-R, CD-RW, DVD-ROM, DVD-RAM, DVD-RW, DVD+RW), a magnetic tape, a non-volatile memory card, and a ROM. Alternatively, the program code can be downloaded from a server computer by a communication network.

[0073] In addition, it should be clear that the functions of any of the above embodiments can be implemented not only by executing the program code read by the computer, but also by enabling an operating system operating on the computer to complete part or all of the actual operations based on instructions from the program code.

[0074] In addition, it can be understood that the program code read from the storage medium is written to a memory provided in an expansion board inserted into the computer or to a memory provided in an expansion module connected to the computer, and then based on the instructions of the program code, a CPU installed on the expansion board or expansion module is enabled to perform part or all of the actual operations, thereby realizing the functions of any of the above-mentioned embodiments.

[0075] It should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0076] A person of ordinary skill in the art can understand that all or part of the steps of implementing the above method embodiments can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it executes the steps of the above method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk, etc., various media that can store program codes.

[0077] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A load regulation method for hydrogen production by electrolysis, characterized in that: A controller applied to an electrolytic hydrogen production system, the electrolytic hydrogen production system comprising a renewable energy power generation device, a power generation measuring device and a plurality of electrolyzers, the renewable energy power generation device being respectively connected to the power generation measuring device and all the electrolyzers, all the electrolyzers and the power generation measuring device being respectively connected to the controller, the method comprising: Acquire the operating parameters of each electrolytic cell in the current state and the power generation power of the renewable energy power generation device in the current state measured by the power generation power measurement device; Based on the generated power and the operating parameters, determine the target regulated power of each electrolytic cell, so as to use the target regulated power to regulate the power of each corresponding electrolytic cell; The operating parameters include operating power, maximum load adjustment range, best energy efficiency power and maximum power; The step of determining the target adjustment power of each electrolytic cell based on the generated power and the operating parameters comprises: Determining a load adjustment mode of each of the electrolytic cells based on the generated power and the operating power; Under the determined load regulation mode, based on the maximum load regulation amplitude, at least one of the best energy efficiency power and the maximum power, and the generated power, determine the target regulation power of each electrolytic cell; The step of determining a load adjustment mode of each electrolytic cell based on the generated power and the operating power comprises: Calculating the total power difference between the generated power and the sum of the operating power of each of the electrolytic cells; If the total power difference is positive, the load adjustment mode of each electrolytic cell is determined to be increasing the load; If the total power difference is negative, the load adjustment mode of each electrolytic cell is determined to be load reduction; When the load regulation mode is to increase the load, determining the target regulation power of each electrolytic cell based on the maximum load regulation amplitude, at least one of the best energy efficiency power and the maximum power, and the generated power includes: Screening out the target electrolytic cell whose operating power is less than the optimal energy efficiency power; Sort the difference between the optimal energy efficiency power and the operating power of each target electrolytic cell in descending order to obtain a first allocation set; Allocate the total power difference to each of the target electrolyzers in sequence according to the order of the first allocation set and the preset first allocation principle, so that each of the target electrolyzers operates according to the allocated power; wherein the first allocation principle satisfies the following two conditions at the same time: the allocated power of each of the target electrolyzers is not greater than the optimal energy efficiency power, and the difference between the allocated power of each of the target electrolyzers and the power before allocation is not greater than the maximum load adjustment range; If the total power difference has been completely allocated in the first allocation set, the allocated power of each target electrolytic cell is determined as the target adjustment power; If the total power difference is not completely allocated in the first allocation set, executing: Sorting the current operating powers of all the electrolytic cells in ascending order to obtain a second allocation set; Allocate the remaining total power difference that has not been fully allocated in the first allocation set to each of the electrolytic cells in turn according to the order of the second allocation set and a preset second allocation principle; wherein the second allocation principle satisfies the following two conditions at the same time: the power allocated to each of the electrolytic cells is not greater than the maximum power, and the difference between the power of each of the electrolytic cells after final allocation and the power before the first allocation is not greater than the maximum load adjustment range; The power finally allocated to each of the electrolytic cells is determined as the target regulated power.

2. A load regulating device for hydrogen production by electrolysis, characterized in that: A controller applied to an electrolytic hydrogen production system, the electrolytic hydrogen production system comprising a renewable energy power generation device, a power generation power measurement device and a plurality of electrolyzers, the renewable energy power generation device is respectively connected to the power generation power measurement device and all the electrolyzers, all the electrolyzers and the power generation power measurement device are respectively connected to the controller, the device comprising: An acquisition module, used to acquire the operating parameters of each electrolytic cell in the current state and the power generation power of the renewable energy power generation device in the current state measured by the power generation power measurement device; A determination module, configured to determine a target adjustment power of each of the electrolytic cells based on the generated power and the operating parameters, so as to use the target adjustment power to perform power adjustment on each corresponding electrolytic cell; The operating parameters include operating power, maximum load adjustment range, best energy efficiency power and maximum power; The determining module is used to perform the following operations: Determining a load adjustment mode of each of the electrolytic cells based on the generated power and the operating power; Under the determined load regulation mode, based on the maximum load regulation amplitude, at least one of the best energy efficiency power and the maximum power, and the generated power, determine the target regulation power of each electrolytic cell; When the determination module determines the load adjustment mode of each electrolytic cell based on the generated power and the operating power, the determination module is used to perform the following operations: Calculating the total power difference between the generated power and the sum of the operating power of each of the electrolytic cells; If the total power difference is positive, the load adjustment mode of each electrolytic cell is determined to be increasing the load; If the total power difference is negative, the load adjustment mode of each electrolytic cell is determined to be load reduction; When the load regulation mode is to increase the load, the determination module is used to perform the following operations when determining the target regulation power of each electrolytic cell based on the maximum load regulation amplitude, at least one of the best energy efficiency power and the maximum power and the generated power: Screening out the target electrolytic cell whose operating power is less than the optimal energy efficiency power; Sort the difference between the optimal energy efficiency power and the operating power of each target electrolytic cell in descending order to obtain a first allocation set; Allocate the total power difference to each of the target electrolyzers in sequence according to the order of the first allocation set and the preset first allocation principle, so that each of the target electrolyzers operates according to the allocated power; wherein the first allocation principle satisfies the following two conditions at the same time: the allocated power of each of the target electrolyzers is not greater than the optimal energy efficiency power, and the difference between the allocated power of each of the target electrolyzers and the power before allocation is not greater than the maximum load adjustment range; If the total power difference has been completely allocated in the first allocation set, the allocated power of each target electrolytic cell is determined as the target adjustment power; If the total power difference is not completely allocated in the first allocation set, executing: Sorting the current operating powers of all the electrolytic cells in ascending order to obtain a second allocation set; Allocate the remaining total power difference that has not been fully allocated in the first allocation set to each of the electrolytic cells in turn according to the order of the second allocation set and a preset second allocation principle; wherein the second allocation principle satisfies the following two conditions at the same time: the power allocated to each of the electrolytic cells is not greater than the maximum power, and the difference between the power of each of the electrolytic cells after final allocation and the power before the first allocation is not greater than the maximum load adjustment range; The power finally allocated to each of the electrolytic cells is determined as the target regulated power.

Images