CN117051433A - Multi-stack PEM water electrolysis hydrogen production system and control method - Google Patents
Multi-stack PEM water electrolysis hydrogen production system and control method Download PDFInfo
- Publication number
- CN117051433A CN117051433A CN202311161780.3A CN202311161780A CN117051433A CN 117051433 A CN117051433 A CN 117051433A CN 202311161780 A CN202311161780 A CN 202311161780A CN 117051433 A CN117051433 A CN 117051433A
- Authority
- CN
- China
- Prior art keywords
- power
- hydrogen production
- power supply
- electrolytic
- stack
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000001257 hydrogen Substances 0.000 title claims abstract description 105
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 105
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 102
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 94
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000005868 electrolysis reaction Methods 0.000 title claims abstract description 24
- 238000009826 distribution Methods 0.000 claims abstract description 17
- 238000003860 storage Methods 0.000 claims description 17
- 238000010248 power generation Methods 0.000 claims description 16
- 230000008859 change Effects 0.000 claims description 13
- 238000006243 chemical reaction Methods 0.000 claims description 13
- 239000002028 Biomass Substances 0.000 claims description 5
- 239000003792 electrolyte Substances 0.000 claims description 3
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 150000002431 hydrogen Chemical class 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 239000000110 cooling liquid Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B15/00—Operating or servicing cells
- C25B15/02—Process control or regulation
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/02—Hydrogen or oxygen
- C25B1/04—Hydrogen or oxygen by electrolysis of water
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Automation & Control Theory (AREA)
- Inorganic Chemistry (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The application discloses a multi-stack PEM water electrolysis hydrogen production system and a control method. The hydrogen production system comprises an electrolytic hydrogen production device and a power supply device, wherein the power supply device is configured to provide output power with variable size, the electrolytic hydrogen production device comprises a plurality of electrolytic tank units, the hydrogen production system comprises an access allocation device, the access allocation device can connect and connect a plurality of the electrolytic tank units in parallel and/or in series to the power supply device, and the access allocation device is configured to: selecting a plurality of electrolytic tank units for series connection to obtain an optimal series connection mode that the total power consumption of the plurality of electrolytic tanks in a series connection state is most matched with the output power of the power supply device; and in an optimal series mode, selecting one or more electrolytic tank units for parallel connection so that the total power consumption of the electrolytic tank is further matched with the output power of the power supply device. The application can obtain a power distribution scheme with small power loss, and the power adjustment is simple, convenient and rapid.
Description
Technical Field
The application relates to the technical field of water electrolysis hydrogen production, in particular to a multi-stack PEM water electrolysis hydrogen production system and a control method.
Background
The hydrogen energy is used as a clean, pollution-free, renewable and sustainable energy source, and is an ideal energy source. The main source of the hydrogen energy is industrial byproduct hydrogen, the byproduct hydrogen amount is gradually reduced along with the adjustment and transformation of an energy framework, and the current solar energy, wind energy, biomass energy, hydraulic power and other waste electric energy sources are gradually focused, so that the unstable energy sources are converted into hydrogen energy which can be stored and is convenient to transport through electrolyzed water, and the hydrogen energy is a good energy conversion scheme.
However, the use of these unstable energy sources for electrolysis of water has the disadvantage of large fluctuation in conversion efficiency and low overall conversion efficiency. To solve this problem, power optimization allocation schemes for dynamic allocation of power have been developed. The existing power optimization distribution scheme has a chained distribution scheme, namely each stage of electrolytic cells are put into operation step by step, the next stage of electrolytic cells are started after the previous stage of electrolytic cells reach rated input power, and the like. The chain distribution scheme can improve the conversion efficiency to a certain extent, but the distribution mode is still rough, and larger power loss still exists. In the prior art, the optimal power distribution scheme is obtained through a plurality of optimizing algorithm models, but the problems of complex models, large calculated amount, long calculated time and complicated optimizing and adjusting process exist.
Based on this, it is necessary to propose a technical solution to overcome the drawbacks of the prior art.
Disclosure of Invention
In order to overcome the defects of the prior art, the application provides a multi-stack PEM water electrolysis hydrogen production system and a control method, a power distribution scheme with extremely low power loss can be obtained, and the power distribution scheme is simple, convenient and rapid to adjust.
The application is realized by the following technical scheme: a multi-stack PEM electrolyzed water hydrogen production system comprising an electrolytic hydrogen production apparatus and a power supply apparatus for providing electrical energy to the electrolytic hydrogen production apparatus, the power supply apparatus configured to provide an output power of varying magnitude, wherein the electrolytic hydrogen production apparatus comprises a plurality of electrolyzer units, the multi-stack PEM electrolyzed water hydrogen production system further comprising an access deployment apparatus configured to enable a plurality of the plurality of electrolyzer units to be connected in parallel and/or in series and to switch on the power supply apparatus, wherein the access deployment apparatus is configured to: selecting a plurality of electrolytic tank units for series connection to obtain an optimal series connection mode that the total power consumption of the plurality of electrolytic tanks in a series connection state is most matched with the output power of the power supply device; and, in an optimal series mode, selecting one or more cells to be connected in parallel so that the total power consumption of the cells is further matched with the output power of the power supply device.
As a further improved technical scheme of the application, the power supply device is one or more of a photovoltaic power generation device, a wind power generation device, a hydroelectric power generation device and a biomass energy power generation device.
As a further improved technical scheme of the application, the multi-stack PEM electrolyzed water hydrogen production system further comprises a statistics device, wherein the statistics device is configured to count the distribution of the output power of the power supply device in a preset time period, and the total number of the electrolyzer units included in the electrolyzed hydrogen production device and the power level of each electrolyzer unit are matched according to the distribution of the output power of the power supply device counted by the statistics device.
As a further improved aspect of the present application, the multi-stack PEM electrolyzed water hydrogen production system further comprises an electrical storage device coupled to the power supply device, the electrical storage device configured to store unconsumed electrical energy generated by the power supply device when the electrolyzed hydrogen production device is not operating and/or the total power consumption of the electrolyzed hydrogen production device is less than the power supply device, the electrical storage device coupled to the electrolyzed hydrogen production device to be adapted to provide electrical energy to the electrolyzed hydrogen production device in conjunction with the power supply device.
As a further improved aspect of the present application, the multi-stack PEM electrolyzed water hydrogen production system includes a water thermal management device for providing an electrolyte having a temperature suitable for an electrolyzed water reaction to the electrolyzed hydrogen production device.
As a further development of the application, at least several of the plurality of electrolytic cell units can be connected to the system by the connection deployment device in a manner switched between parallel and series.
As a further improved technical scheme of the application, the access allocation device comprises a double-throw switch, the double-throw switch is provided with two switchable contacts, and different contacts are switched through the double-throw switch to switch the serial and parallel connection modes of the electrolytic tank units.
The application is also realized by the following technical scheme: a method of controlling a multi-stack PEM electrolyzed water hydrogen production system, wherein the hydrogen production system comprises an electrolytic hydrogen production device configured to provide a varying magnitude of output power to the electrolytic hydrogen production device, a power supply device comprising a plurality of electrolyzer units of different power levels, and an access deployment device configured to enable a plurality of the plurality of electrolyzer units to be connected in parallel and/or in series and to switch on the power supply device; the control method comprises the following steps:
selecting a plurality of electrolytic tank units with proper quantity and power level for series connection to obtain an optimal series connection mode that the total power consumption of the plurality of electrolytic tanks in a series connection state is most matched with the output power of the power supply device;
in an optimal series mode, a plurality of electrolytic tank units of suitable number and power level are selected to be connected in parallel, so that the total power consumption of the electrolytic tank is further matched with the output power of the power supply device.
As a further improved technical scheme of the application, the number of times of parallel adjustment of the electrolytic tank units is more than the number of times of serial adjustment of the electrolytic tank units in a preset time period.
As a further improved technical solution of the present application, the control method includes: dividing a plurality of power intervals according to the output power of the power supply device;
and detecting the output power of the power supply device, and adjusting the number of the electrolytic tank units connected in series when detecting that the output power of two adjacent times changes across the power interval.
As a further improved technical scheme of the application, when detecting that the output power of two adjacent times changes from a small power interval to a large power interval, the number of the electrolytic tank units connected in series is increased; when the output power of two adjacent times is detected to change from a high power interval to a low power interval, the number of the electrolytic tank units connected in series is reduced.
As a further improved technical solution of the present application, the control method includes dividing a plurality of power subintervals according to the magnitude of the output power in at least one power interval;
detecting the output power of the power supply device, and adjusting the number of parallel connection of the electrolytic tank units when detecting that the output power of two adjacent times changes across the power subinterval;
when detecting that the output power of two adjacent times changes from a small power subinterval to a large power subinterval, increasing the number of parallel connection of the electrolytic cells; and when detecting that the output power of two adjacent times changes from a high-power subinterval to a low-power subinterval, reducing the number of parallel connection of the electrolytic tank units.
According to the multi-stack PEM water electrolysis hydrogen production system and the control method, a plurality of electrolytic tank units are selected to be connected in series, so that an optimal series connection mode that the total power consumption of the plurality of electrolytic tanks in a series connection state is most matched with the output power of the power supply device is obtained; and under the optimal serial connection mode, selecting one or more electrolytic tank units to be connected in parallel, so that the total power consumption of the electrolytic tank is further matched with the output power of the power supply device; the power distribution scheme is simple, convenient and rapid to adjust, can be used for rapidly matching with fluctuating power consumption supply, and is small in power loss.
Drawings
FIG. 1 is a block diagram schematic of an embodiment of a multi-stack PEM water electrolysis hydrogen production system of the present application.
FIG. 2 is a schematic diagram of the connection of one embodiment of a multi-stack PEM water electrolysis hydrogen production system of the present application.
FIG. 3 is a graph of output power variation versus cell unit adjustment for a multi-stack PEM water electrolysis hydrogen production system of the present application.
FIG. 4 is a schematic circuit diagram of a multi-stack PEM water electrolysis hydrogen production system of the present application.
FIG. 5 is another schematic circuit diagram of a multi-stack PEM water electrolysis hydrogen production system of the present application.
FIG. 6 is yet another schematic circuit diagram of a multi-stack PEM water electrolysis hydrogen production system of the present application.
The reference numerals are as follows: 1-a power supply device; 11-an electrical storage device; 2-an electrolytic hydrogen production device; 21-an electrolyzer unit; 3-accessing the allocating device; 4-a gas storage device; 5-a hydrothermal management device.
Detailed Description
For a clearer understanding of technical features, objects, and effects of the present application, a detailed description of embodiments of the present application will be made with reference to the accompanying drawings.
The technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments of the present application are included in the protection scope of the present application.
Referring to fig. 1-3, the present application provides a multi-stack PEM electrolyzed water hydrogen production system and control method suitable for use with fluctuating power output. An embodiment of the multi-stack PEM electrolyzed water hydrogen production system comprises an electrolyzed hydrogen production apparatus 2 and a power supply apparatus 1 for providing electrical energy to the electrolyzed hydrogen production apparatus 2, the power supply apparatus 1 configured to provide an output power of varying magnitude, wherein the electrolyzed hydrogen production apparatus 2 comprises a plurality of electrolyzer units 21, the multi-stack PEM electrolyzed water hydrogen production system further comprising an access deployment apparatus 3, the access deployment apparatus 3 configured to enable a plurality of the plurality of electrolyzer units 21 to be connected in parallel and/or in series and to switch on the power supply apparatus 1. Wherein the access deployment device 3 is configured to: selecting a plurality of electrolytic tank units 21 for series connection to obtain an optimal series connection mode that the total power consumption of the plurality of electrolytic tanks in a series connection state is most matched with the output power of the power supply device 1; and, in an optimal series mode, one or more cells 21 are selected to be connected in parallel so that the total power consumption of the cells is further matched to the output power of the power supply 1.
In an embodiment, the power supply device 1 is one or more of a photovoltaic power generation device, a wind power generation device, a hydro power generation device and a biomass power generation device. The photovoltaic power generation device, the wind power generation device, the hydroelectric power generation device and the biomass energy power generation device are in an energy form with larger power fluctuation, are greatly influenced by natural conditions such as weather, seasons, regions and the like, are often used as power abandoning, and have low utilization rate. The hydrogen production system provided by the application can be suitable for the energy sources, and the utilization efficiency of the energy sources is improved. In an embodiment, the power supply device 1 may also be powered in order to operate with the mains power provided by the grid when the power is not available.
In this embodiment, the total number of the electrolytic tank units 21 included in the electrolytic hydrogen production device 2 and the power level of each electrolytic tank unit 21 are matched according to the distribution of the output power of the power supply device 1 corresponding to the total number of the electrolytic tank units 21, so as to ensure the utilization rate of the electrolytic tank units 21. Taking photovoltaic energy as an example, if the hydrogen production system of the present application is configured in a region with abundant photovoltaic energy, such as a Tibetan region of China, the number of the electrolytic tank units 21 can be relatively large, and the electrolytic tank units 21 are configured with relatively large rated power; if the hydrogen production system of the present application is disposed in a region where the photovoltaic energy is relatively poor, for example, in the Sichuan region of China, the number of the electrolyzer units 21 may be relatively small, and the electrolyzer units 21 may be disposed with a relatively small rated power. That is, in this embodiment, the multi-stack PEM electrolyzed water hydrogen production system further includes a statistics device configured to count the distribution of the output power levels of the power supply device 1 within a preset period of time, and the total number of the electrolyzer units 21 included in the electrolytic hydrogen production device 2 and the power level of each electrolyzer unit 21 are set in a matching manner according to the distribution of the output power levels of the power supply device 1 counted by the statistics device.
Referring to fig. 2, the multi-stack PEM electrolyzed water hydrogen production system further includes an electrical storage device 11 coupled to the power supply device 1, the electrical storage device 11 configured to store unconsumed electrical energy generated by the power supply device 1 when the electrolyzed hydrogen production device 2 is not operating and/or the total power consumption of the electrolyzed hydrogen production device 2 is less than the power supply device 1. Further, the electricity storage device 11 is connected to the electrolytic hydrogen production device 2 so as to be adapted to supply electric energy to the electrolytic hydrogen production device 2 together with the power supply device 1. In an embodiment, the power supply device 1 supplies power to the electrolytic hydrogen production device 2 in a direct coupling manner, that is, the electric energy of the power supply device 1 is not converted and stored, so as to reduce energy loss in the conversion and storage processes. The electric energy generated by the power supply device 1 is converted and stored only when the electrolytic hydrogen production device 2 is not operated and/or the total power consumption of the electrolytic hydrogen production device 2 is smaller than that of the power supply device 1.
With continued reference to FIG. 2, the multi-stack PEM water electrolysis hydrogen production system includes a water thermal management arrangement 5, the water thermal management arrangement 5 being configured to provide electrolyte to the water electrolysis hydrogen production arrangement 2 having a temperature suitable for the reaction of electrolyzed water. In the embodiment, the water and heat are supplied in the same mode, and water with proper temperature is supplied excessively so as to ensure the reaction temperature while meeting the requirement of hydrogen production reaction. Namely, in the electrolytic hydrogen production working process of the PEM electrolytic tank, two water functions exist, namely, the water is used as hydrogen production raw material to carry out 2H 2 O=2H 2 +O 2 And secondly, the cooling liquid which is circularly supplied as the heat management ensures the electrochemical reaction in a proper temperature range. In one embodiment of the application, the water for electrolysis reaction is not separated from the water for heat transfer, and the excessive water is introduced to be used as a reactant and also used as a cooling liquid to directly enter the PEM electrolytic tank, so that the structure is simple. The gas generated by the reaction is stored in the gas storage device 4. The gas storage device 4 includes a high-pressure hydrogen storage tank for storing gaseous hydrogen, a metal hydrogen storage tank for storing solid hydrogen, and an oxygen storage tank for storing generated oxygen.
Referring to fig. 4 to 6, in some embodiments, the access deployment device 3 includes a plurality of switches, through which one or more electrolytic cell units 21 may or may not be connected to the system, and may or may not be connected in series. In one embodiment, as shown in fig. 4, a switch is provided on each parallel branch, for example, K1, K2, K3, and by switching on and off the switches K1, K2, K3, the electrolytic cell units 21 on the corresponding branch can be connected in parallel with the serial branch. For such circuits, the electrolyzer units 21 on the parallel branches can only be connected to the system in parallel or not, and cannot be multiplexed in parallel or in series, so that the utilization rate of the electrolyzer units 21 is not high.
In another embodiment, as shown in fig. 5, at least several of the plurality of electrolyzer units 21 can be connected to the system by the connection deployment device 3 in a manner that they are switched between parallel and serial. Specifically, the three parallel branches are illustrated in fig. 5, and the change-over switch includes switches K11, K21, K31 provided on the main path, switches K13, K23, K33 provided on the parallel branches, and bypass switches K12, K22, K32 provided between the parallel branches and the main path. When the parallel connection is needed, the switches K11, K21 and K31 and the switches K13, K23 and K33 are turned on, and the bypass switches K12, K22 and K32 are turned off; when serial connection is needed, the switches K11, K21 and K31 and the switches K13, K23 and K33 are disconnected, and the bypass switches K12, K22 and K32 are opened; when the system is not needed to be accessed, the switches K11, K21 and K31 are turned on, and the switches K13, K23 and K33 and the bypass switches K12, K22 and K32 are turned off. It can be understood that if only one or two branches are connected, the corresponding switch is controlled to be on or off.
In another embodiment, as shown in fig. 6, the access deployment device 3 comprises a double-throw switch having two contacts that can be switched on, and the different contacts are switched by the double-throw switch to switch the series-parallel connection of the electrolytic cell units 21. In this embodiment, the switches K13, K23, K33 are single-throw switches, and the switches K11, K21, K31 are double-throw switches. The number of the switches can be reduced by arranging the double-throw switches, and meanwhile, the serial and parallel switching can be conveniently and rapidly realized. In this embodiment, when connected in parallel, the switches K13, K23, K33 are turned on, and the double-throw switches K11, K21, K31 turn on the contacts on the main circuit; when connected in series, the switches K13, K23, K33 are turned off, and the double throw switches K11, K21, K31 are turned on the contacts on the bypass branch. In an embodiment, the switching in or out of the series number, the parallel number may be implemented by a relay, i.e. the switch is a relay switch. The relay switch has the advantages of high response speed and easy control. Preferably, contacts on main paths of the double-throw switches K11, K21 and K31 are normally closed contacts, and contacts on bypass paths are normally open contacts, so that the double-throw switch can be suitable for parallel adjustment frequency, actions of relays are reduced, and circuit stability of a system is improved.
The application also provides a control method of a multi-stack PEM electrolytic water hydrogen production system, wherein the hydrogen production system comprises an electrolytic hydrogen production device 2, a power supply device 1 and an access allocation device 3, wherein the power supply device 1 is configured to provide output power with variable size for the electrolytic hydrogen production device 2, the electrolytic hydrogen production device 2 comprises a plurality of electrolytic tank units 21 with different power levels, and the access allocation device 3 is configured to connect a plurality of the electrolytic tank units 21 in parallel and/or in series and connect the power supply device 1; the control method comprises the following steps:
selecting a plurality of electrolytic tank units 21 with proper quantity and power level for series connection to obtain an optimal series connection mode that the total power consumption of the plurality of electrolytic tanks in a series connection state is most matched with the output power of the power supply device 1;
in an optimal series mode, a number of cells 21 of suitable number and power class are selected to be connected in parallel so that the total power consumption of the cells is further matched to the output power of the power supply 1.
The change in the number of cells 21 in series has a slower effect on the change in power consumption, making it difficult for the total power consumption of the cells to follow the change in the output power of the power supply 1. Thus, the adjustment of the number of series is first effected so that the total power of the electrolytic cells involved in the reaction is initially brought close to the output power of the power supply device 1 as a whole. For finer power fluctuations, a fast, precise adjustment is achieved by adjusting the number of parallel cell units 21 so that the total power of the cells participating in the reaction can be further fitted to the output power variation. The scheme can reduce the number of times of series adjustment, reduce the impact on a series circuit, and ensure better circuit reliability of the electrolytic hydrogen production device 2.
Referring to fig. 3, the number of times the parallel adjustment of the electrolytic cell units 21 is performed is greater than the number of times the series adjustment of the electrolytic cell units 21 is performed within a preset time period t. Fig. 3 is a graph illustrating the change of photovoltaic energy over time in one day, for example, from morning to evening, the change of output power achieved by the photovoltaic energy is shown as a change curve of increasing and then decreasing, and the change of the number of electrolytic tank units 21 connected into the multi-stack PEM water electrolysis hydrogen production system provided by the application is shown as a series number change line and a parallel number change line in the figure.
Further, the control method includes: dividing a plurality of power intervals according to the output power of the power supply device 1, such as dividing three power intervals by two dotted lines L1 in FIG. 3; the output power of the power supply device 1 is detected, and when a change in the output power of two adjacent times across the power section is detected, the number of series connection of the electrolytic cell units 21 is adjusted. That is, when the power variation is large such that the number of the present electrolytic cell units 21 connected in series is insufficient to match the output power, the number of electrolytic cell units 21 connected in series is adjusted. Specifically, when it is detected that the output power of the adjacent two times is changed from the small power section to the large power section, the number of the series connection of the electrolytic cell units 21 is increased; when it is detected that the output power of the adjacent two times changes from the high power section to the low power section, the number of the series connection of the electrolytic cell units 21 is reduced.
Further, the control method includes dividing a plurality of power subintervals according to the magnitude of the output power within at least one power interval, such as four short dashed lines between two dashed lines L1 in fig. 3, dividing the power interval between two dashed lines L1 into five power subintervals; detecting the output power of the power supply device 1, and adjusting the parallel number of the electrolytic tank units 21 when detecting that the output power of two adjacent times changes across the power subinterval; wherein the number of parallel connections of the electrolytic cell units 21 is increased when it is detected that the output power of the adjacent two times is changed from the small power subinterval to the large power subinterval; when it is detected that the output power of the adjacent two times is changed from the high power subinterval to the low power subinterval, the number of parallel connection of the electrolytic cell units 21 is reduced.
As can be seen from the above description of the specific embodiments, the multi-stack PEM electrolyzed water hydrogen production system and the control method provided by the present application select a plurality of electrolyzer units 21 to be connected in series, so as to obtain an optimal series connection mode in which the total power consumption of the plurality of electrolyzers in the series state is most matched with the output power of the power supply device; and in an optimal series mode, selecting one or more cells 21 to be connected in parallel so that the total power consumption of the cells is further matched with the output power of the power supply means; the power distribution scheme is simple, convenient and rapid to adjust, can be used for rapidly matching with fluctuating power consumption supply, and is small in power loss.
While the application has been described with reference to several particular embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the application. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the application without departing from the essential scope thereof. Therefore, it is intended that the application not be limited to the particular embodiment disclosed, but that the application will include all embodiments falling within the scope of the appended claims.
Claims (12)
1. A multi-stack PEM electrolyzed water hydrogen production system comprising an electrolytic hydrogen production apparatus and a power supply apparatus for providing electrical energy to the electrolytic hydrogen production apparatus, the power supply apparatus configured to provide a variable-sized output power, characterized in that the electrolytic hydrogen production apparatus comprises a plurality of electrolyzer units, the multi-stack PEM electrolyzed water hydrogen production system further comprising an access deployment apparatus configured to enable a plurality of the plurality of electrolyzer units to be connected in parallel and/or in series and to switch on the power supply apparatus, wherein the access deployment apparatus is configured to: selecting a plurality of electrolytic tank units for series connection to obtain an optimal series connection mode that the total power consumption of the plurality of electrolytic tanks in a series connection state is most matched with the output power of the power supply device; and, in an optimal series mode, selecting one or more cells to be connected in parallel so that the total power consumption of the cells is further matched with the output power of the power supply device.
2. The multi-stack PEM electrolyzed water hydrogen production system of claim 1 wherein the power supply is one or more of a photovoltaic power generation device, a wind power generation device, a hydro power generation device, and a biomass power generation device.
3. The multi-stack PEM water electrolysis hydrogen production system of claim 2, further comprising a statistics device configured to count a distribution of power levels of the power supplies over a predetermined period of time, the total number of electrolyzer units included in the hydrogen electrolysis device and the power level of each electrolyzer unit being matched in accordance with the distribution of power levels of the power supplies counted by the statistics device.
4. The multi-stack PEM electrolyzed water hydrogen production system of claim 1 further comprising an electrical storage device coupled to the power supply, the electrical storage device configured to store unconsumed electrical energy generated by the power supply when the electrolyzed hydrogen production device is not operating and/or the total power consumption of the electrolyzed hydrogen production device is less than the power supply, the electrical storage device coupled to the electrolyzed hydrogen production device adapted to provide electrical energy to the electrolyzed hydrogen production device in conjunction with the power supply.
5. The multi-stack PEM electrolyzed water hydrogen production system of claim 1 comprising a water thermal management device for providing electrolyte having a temperature suitable for an electrolyzed water reaction to the electrolyzed hydrogen production device.
6. A multi-stack PEM electrolyzed water hydrogen production system according to any of claims 1 to 5 wherein at least some of said plurality of electrolyzer units are capable of being accessed into the system by said access deployment means in a manner that is switched between parallel and series.
7. The multi-stack PEM electrolyzed water hydrogen production system of claim 6 wherein said access deployment means comprises a double throw switch having two contacts switchably on, different contacts being switched by the double throw switch to switch the series-parallel arrangement of the electrolyzer units.
8. A control method of a multi-stack PEM electrolyzed water hydrogen production system, characterized in that the hydrogen production system comprises an electrolytic hydrogen production device, a power supply device and an access deployment device, wherein the power supply device is configured to provide output power with variable magnitude for the electrolytic hydrogen production device, the electrolytic hydrogen production device comprises a plurality of electrolytic tank units with different power levels, and the access deployment device is configured to connect a plurality of the electrolytic tank units in parallel and/or series and switch on the power supply device; the control method comprises the following steps:
selecting a plurality of electrolytic tank units with proper quantity and power level for series connection to obtain an optimal series connection mode that the total power consumption of the plurality of electrolytic tanks in a series connection state is most matched with the output power of the power supply device;
in an optimal series mode, a plurality of electrolytic tank units of suitable number and power level are selected to be connected in parallel, so that the total power consumption of the electrolytic tank is further matched with the output power of the power supply device.
9. The method of controlling a multi-stack PEM water electrolysis hydrogen production system of claim 8, wherein the number of parallel adjustments made to the electrolyzer units is greater than the number of series adjustments made to the electrolyzer units within a predetermined period of time.
10. The method of controlling a multi-stack PEM water electrolysis hydrogen production system of claim 8, wherein said control method comprises: dividing a plurality of power intervals according to the output power of the power supply device;
and detecting the output power of the power supply device, and adjusting the number of the electrolytic tank units connected in series when detecting that the output power of two adjacent times changes across the power interval.
11. The method of controlling a multi-stack PEM water electrolysis hydrogen production system of claim 10, wherein the number of series connections of said electrolyzer units is increased when a change in output power from a small power interval to a large power interval is detected for two adjacent times; when the output power of two adjacent times is detected to change from a high power interval to a low power interval, the number of the electrolytic tank units connected in series is reduced.
12. The control method of a multi-stack PEM water electrolysis hydrogen production system of claim 10, wherein said control method comprises dividing a plurality of power subintervals according to the magnitude of said output power within at least one power interval;
detecting the output power of the power supply device, and adjusting the number of parallel connection of the electrolytic tank units when detecting that the output power of two adjacent times changes across the power subinterval;
when detecting that the output power of two adjacent times changes from a small power subinterval to a large power subinterval, increasing the number of parallel connection of the electrolytic tank units; and when detecting that the output power of two adjacent times changes from a high-power subinterval to a low-power subinterval, reducing the number of parallel connection of the electrolytic tank units.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311161780.3A CN117051433A (en) | 2023-09-11 | 2023-09-11 | Multi-stack PEM water electrolysis hydrogen production system and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311161780.3A CN117051433A (en) | 2023-09-11 | 2023-09-11 | Multi-stack PEM water electrolysis hydrogen production system and control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117051433A true CN117051433A (en) | 2023-11-14 |
Family
ID=88655404
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311161780.3A Pending CN117051433A (en) | 2023-09-11 | 2023-09-11 | Multi-stack PEM water electrolysis hydrogen production system and control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117051433A (en) |
-
2023
- 2023-09-11 CN CN202311161780.3A patent/CN117051433A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Hosseini et al. | Multi-input DC boost converter for grid connected hybrid PV/FC/battery power system | |
| KR101926008B1 (en) | A control and operating method of power converter for power supply of hydrogen electrolytic device using solar energy | |
| CN112725832A (en) | Water electrolysis hydrogen production control method, system and controller | |
| CN101565832A (en) | Water electrolysis hydrogen production system for solar battery | |
| CN112290581A (en) | New energy off-grid hydrogen production system | |
| US20230043491A1 (en) | Off-grid electrolysis control method and device thereof independent of grid | |
| CN114374220A (en) | Electrochemical cell-water electrolysis hydrogen production-hydrogen storage-hydrogen fuel cell coupling energy storage system and control method | |
| CN114908365B (en) | Off-grid photovoltaic hydrogen production system control method | |
| CN114447968A (en) | Large-scale photovoltaic electrolyzed water hydrogen production system and method utilizing hybrid energy storage device | |
| CN115882515A (en) | Micro-grid system for cooperating multi-type electrolytic hydrogen production and energy storage battery and operation method | |
| Vivas et al. | Battery-based storage systems in high voltage-DC bus microgrids. A real-time charging algorithm to improve the microgrid performance | |
| CN116505560A (en) | High-efficiency circulating system for discarding electricity, storing energy and recycling | |
| CN205489554U (en) | Millet power supply system is filled out in peak clipping based on methanol -water reformation hydrogen manufacturing power generation system | |
| CN105811443A (en) | Peak shaving and load shifting power supply system and method based on methanol water reforming hydrogen generation power generation system | |
| CN111962092A (en) | Off-grid independent electrolytic cell structure and electrode control method | |
| CN111030148A (en) | Zero-pollution electric power micro-grid system composed of multiple green energy sources | |
| CN117051433A (en) | Multi-stack PEM water electrolysis hydrogen production system and control method | |
| CN206692745U (en) | Electrolysis unit | |
| CN115637447A (en) | Renewable energy source coupled step hydrogen production system and hydrogen production method | |
| CN113846340A (en) | Hydrogen energy management system | |
| Aggad et al. | Modeling, design and energy management of a residential standalone photovoltaic-fuel cell power system | |
| CN112647088A (en) | Off-grid electrolysis control structure and mode | |
| CN117411087B (en) | Collaborative optimization control method and system for wind-solar hydrogen storage combined power generation system | |
| CN115882497B (en) | Green electricity hydrogen production system, method, device and medium thereof | |
| CN218385296U (en) | Hydrogen energy storage system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |