CN114086203A - Intermittent and fluctuating electrolysis hydrogen production control method - Google Patents
Intermittent and fluctuating electrolysis hydrogen production control method Download PDFInfo
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- CN114086203A CN114086203A CN202111399620.3A CN202111399620A CN114086203A CN 114086203 A CN114086203 A CN 114086203A CN 202111399620 A CN202111399620 A CN 202111399620A CN 114086203 A CN114086203 A CN 114086203A
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- 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
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
- C25B9/60—Constructional parts of cells
- C25B9/65—Means for supplying current; Electrode connections; Electric inter-cell connections
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- 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
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- 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
- C25B15/023—Measuring, analysing or testing during electrolytic production
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- 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
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/133—Renewable energy sources, e.g. sunlight
Abstract
The application provides an intermittent and fluctuating electrolytic hydrogen production control method, which comprises the following steps: acquiring the power generation output power of the new energy power generation equipment; comparing the power generation output power with the preset starting power of the electrolytic cell; according to the comparison result of the power generation output power and the preset starting power, the operation state of the electrolytic cell is controlled, and the intermittent and fluctuating electrolytic hydrogen production control method provided by the invention enables an electrolytic hydrogen production system to absorb intermittent and fluctuating wind power generation and photovoltaic power generation, preferentially uses electric energy for hydrogen production under the condition of ensuring the safety of the hydrogen production process, and promotes the absorption and utilization of renewable energy power generation in an off-grid/grid-connected mode.
Description
Technical Field
The application relates to the technical field of hydrogen production, in particular to a control method for intermittent and fluctuating electrolysis hydrogen production.
Background
Under the large background of adjusting energy structures, hydrogen has received unprecedented attention as an energy carrier that can be interconnected with power and heat networks. The traditional direct hydrogen production by fossil fuel can cause a large amount of carbon dioxide emission, which runs counter to the target of carbon emission reduction. The hydrogen production process based on renewable energy avoids carbon dioxide emissions and the hydrogen produced is therefore called "green hydrogen". After the wind power, the photovoltaic and the like can generate electricity by using renewable energy sources, hydrogen is produced by electrolyzing water, and the method is the green hydrogen production mode with the most prospect at present. The planning and development of a ten-million-kilowatt-level large-scale renewable energy power generation base provides a good power supply support for the growth of the green hydrogen production scale.
The traditional water electrolysis hydrogen production equipment mainly operates under a steady state condition and provides high-purity hydrogen for industries such as polysilicon, glass and the like. Because wind power and photovoltaic have fluctuation and intermittence, the water electrolysis hydrogen production equipment needs to change the operation mode to adapt to the characteristics of new energy power generation equipment. The hydrogen production equipment not only needs to adjust the load along with the fluctuation of the generated energy to improve the utilization rate of renewable energy, but also needs to avoid the state of the equipment from deviating from a safety interval through starting and stopping control. Therefore, an intermittent and fluctuating electrolytic hydrogen production control method needs to be developed to ensure that the electrolytic hydrogen production equipment can realize safe and efficient consumption of wind power generation and photovoltaic power generation.
Disclosure of Invention
The present application is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the invention aims to provide an intermittent and fluctuating electrolysis hydrogen production control method, which enables an electrolysis hydrogen production system to absorb intermittent and fluctuating wind power generation and photovoltaic power generation, preferentially uses electric energy for hydrogen production under the condition of ensuring the safety of a hydrogen production process, and promotes the absorption and utilization of renewable energy power generation in an off-grid/grid-connected mode.
In order to achieve the purpose, the intermittent and fluctuating electrolysis hydrogen production control method provided by the application comprises the following steps: acquiring the power generation output power of the new energy power generation equipment; comparing the power generation output power with the preset starting power of the electrolytic cell; and controlling the running state of the electrolytic cell according to the comparison result of the power generation output power and the preset starting power.
Further, according to the comparison result between the power generation output power and the preset starting power, the operation state of the electrolytic cell is controlled, and the method specifically comprises the following steps: when the power generation output power is greater than the preset starting power, starting an electrolytic cell to perform electrolytic hydrogen production; and when the power generation output power is less than the preset starting power, closing the electrolytic cell, wherein the preset starting power is 0-30% of the rated power of the electrolytic cell.
Further, when the power generation output power is smaller than the preset starting power, the method further comprises the following steps after the electrolytic cell is closed: and starting the electricity storage equipment to consume the power generation output power.
Further, when the power generation output power is smaller than the preset starting power, the method further comprises the following steps after the electrolytic cell is closed: and when the shutdown time of the electrolytic cell is longer than the preset time, performing nitrogen replacement on the hydrogen production system, wherein the preset time is 3-12 h.
Further, when the power generation output power is greater than the preset starting power, starting the electrolytic cell to perform electrolytic hydrogen production specifically comprises: and comparing the power generation output power with a preset limit load power of the electrolytic cell, and controlling the input power of the electrolytic cell according to the comparison result of the power generation output power and the preset limit load power, wherein the preset limit load power is 120-200% of the rated power of the electrolytic cell.
Further, according to the comparison result between the power generation output power and the preset limit load power, controlling the input power of the electrolytic cell specifically comprises: when the power generation output power is larger than the preset limit load power, controlling the input power of the electrolytic cell to be equal to the preset limit load power; and when the power generation output power is less than the preset limit load power, controlling the input power of the electrolytic cell to be equal to the power generation output power.
Further, when the power generation output power is greater than the preset limit load power, controlling the input power of the electrolytic cell to be equal to the preset limit load power further comprises: and starting the power storage equipment to consume the residual power generation output power.
Additional aspects and advantages of the present 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 the present application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic flow diagram of a batch, fluctuating electrolysis hydrogen production control method according to an embodiment of the present application.
Detailed Description
Reference will now be made in detail to the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application. On the contrary, the embodiments of the application include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.
FIG. 1 is a schematic flow chart of a batch and fluctuation electrolysis hydrogen production control method provided by an embodiment of the application.
Referring to fig. 1, a control method for intermittent and fluctuating electrolysis hydrogen production comprises the following steps:
acquiring the power generation output power of the new energy power generation equipment;
the new energy power generation equipment can be photovoltaic units or wind power generation equipment and the like which utilize renewable energy to generate power, and is suitable for being installed in areas with rich solar energy and wind power resources. The generated electric quantity can be grid-connected, and after transmission, the generated electric quantity can provide domestic electricity and production electricity for illumination, communication and the like, and can also be used as a power supply to supply power for loads in an off-grid mode. The wind power generation equipment consists of a propeller, a generator speed regulation device, an empennage, a tower, a controller and the like. The photovoltaic unit consists of a photovoltaic panel, a bracket, a controller and other parts. Wind power and photovoltaic have fluctuation and intermittence, so that the wind power and the photovoltaic need to be converted into chemical energy storage for utilization.
Comparing the power generation output power with the preset starting power of the electrolytic cell;
in the embodiment, the preset starting power of the electrolytic cell is 0-30% of the rated power of the electrolytic cell, and preferably, the preset starting power is 20% of the rated power of the electrolytic cell, so that as much renewable energy source power generation as possible can be used for hydrogen production, and the utilization rate of the electrolytic cell is improved; meanwhile, safety risk caused by too low running power of the electrolytic cell is avoided.
And controlling the running state of the electrolytic cell according to the comparison result of the power generation output power and the preset starting power.
In the embodiment, the operation state of the electrolytic hydrogen production system is adjusted in time according to the power supply condition of the power generation equipment, so that dynamic hydrogen production is realized.
Controlling the running state of the electrolytic cell according to the comparison result of the power generation output power and the preset starting power, and specifically comprises the following steps: when the power generation output power is greater than the preset starting power, starting an electrolytic cell to perform electrolytic hydrogen production; and when the power generation output power is smaller than the preset starting power, closing the electrolytic cell.
In this embodiment, the start-up and shut-down of the electrolytic cell is controlled by comparing the power output of the power generation equipment with the preset start-up power. When the power generation output power is greater than the preset starting power, it is indicated that redundant electric energy is generated, hydrogen production and energy storage can be performed by using the electrolytic cell, when the power generation output power is less than the preset starting power, it is indicated that the power generation electric energy of the power generation equipment is less at the moment, the electrolytic cell does not need to be opened or closed at the moment, low-power operation of the electrolytic cell is avoided, and when the electrolytic cell is in low-power operation, due to the characteristics of materials in the electrolytic cell, the risk that hydrogen and oxygen are mutually connected in series to exceed the explosion limit exists, and the control process effectively avoids the risk and ensures the operation safety of the hydrogen production system.
When the power generation output power is smaller than the preset starting power, the method further comprises the following steps after the electrolytic cell is closed: and starting the electricity storage equipment to consume the power generation output power.
In this embodiment, the power storage device specifically includes other energy storage devices such as load electrochemical energy storage or pumped storage, and can flexibly store the generated electric energy of the power generation device.
When the power generation output power is smaller than the preset starting power, the method further comprises the following steps after the electrolytic cell is closed: and when the shutdown time of the electrolytic cell is longer than the preset time, performing nitrogen replacement on the hydrogen production system. The problem of potential safety hazard caused by the fact that the purity of residual gas inside the hydrogen production system is poor after the hydrogen production system is shut down is solved through the arrangement of the shut-down limit time of the electrolytic cell, and the safety of the hydrogen production process is improved.
The preset time is 3-12 h. Within this time range, the safety state of the electrolytic cell can be sufficiently secured, and preferably, the preset time may be set to 4 hours.
When the power generation output power is greater than the preset starting power, starting the electrolytic cell to perform electrolytic hydrogen production specifically comprises: and comparing the power generation output power with the preset limit load power of the electrolytic cell, and controlling the input power of the electrolytic cell according to the comparison result of the power generation output power and the preset limit load power.
In the embodiment, the preset limit load power is 120-200% of the rated power of the electrolytic cell, and the power of the electrolytic cell can exceed the rated power for a short time when the electrolytic cell works, so that the configuration capacity of the electrolytic cell can be reduced by utilizing the characteristic. Preferably, the preset limit load power is set to be 120% of the rated power of the electrolytic cell, so that the electrolytic cell is prevented from running at an excessively high load, and the safe and stable running of the electrolytic cell is further ensured.
Controlling the input power of the electrolytic cell according to the comparison result of the power generation output power and the preset limit load power specifically comprises the following steps: when the power generation output power is larger than the preset limit load power, controlling the input power of the electrolytic cell to be equal to the preset limit load power; and when the power generation output power is less than the preset limit load power, controlling the input power of the electrolytic cell to be equal to the power generation output power.
In this embodiment, the preset limit load power is used as a reference, the generated output power is compared with the preset limit load power to control the working power of the electrolytic cell, when the generated output power of the power generation equipment is greater than the preset limit load power, it indicates that the generated electric energy of the power generation equipment is higher, at this time, the electrolytic cell runs at a high position with the preset limit load power, the generated electric energy is fully stored, efficient utilization of renewable energy is realized, when the generated output power of the power generation equipment is less than the preset limit load power, at this time, the electrolytic cell only runs with the output power of the power generation equipment, and the generated electric energy of the power generation equipment is converted and stored in real time.
When the power generation output power is larger than the preset limit load power, the step of controlling the input power of the electrolytic cell to be equal to the preset limit load power further comprises the following steps: and starting the power storage equipment to consume the residual power generation output power.
When the power generation output power of the power generation equipment is larger than the preset limit load power, the electrolytic bath is used for carrying out high-order operation on the power generation electric energy of the power generation equipment with the preset limit load power to absorb the power generation electric energy of the power generation equipment, surplus electric energy is also provided, in order to completely utilize the power generation electric energy of the power generation equipment, other power storage equipment can be used for temporarily storing the surplus power generation electric energy, and various power storage equipment are matched with each other to realize the efficient utilization of renewable energy.
It should be noted that, in the description of the present application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present application, the meaning of "a plurality" is two or more unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present application have been shown and described above, it will be understood that the above embodiments are exemplary and should not be construed as limiting the present application and that changes, modifications, substitutions and alterations in the above embodiments may be made by those of ordinary skill in the art within the scope of the present application.
Claims (7)
1. A control method for intermittent and fluctuating electrolysis hydrogen production is characterized by comprising the following steps:
acquiring the power generation output power of the new energy power generation equipment;
comparing the power generation output power with the preset starting power of the electrolytic cell;
and controlling the running state of the electrolytic cell according to the comparison result of the power generation output power and the preset starting power.
2. The intermittent and fluctuating electrolytic hydrogen production control method according to claim 1, wherein the controlling the operation state of the electrolytic cell according to the comparison result of the power generation output power and the preset starting power specifically comprises: when the power generation output power is greater than the preset starting power, starting an electrolytic cell to perform electrolytic hydrogen production; and when the power generation output power is less than the preset starting power, closing the electrolytic cell, wherein the preset starting power is 0-30% of the rated power of the electrolytic cell.
3. The intermittent and fluctuating electrolytic hydrogen production control method of claim 2, when the power generation output power is less than the preset starting power, further comprising, after shutting down the electrolytic cell: and starting the electricity storage equipment to consume the power generation output power.
4. The intermittent and fluctuating electrolytic hydrogen production control method of claim 2, when the power generation output power is less than the preset starting power, further comprising, after shutting down the electrolytic cell: when the shutdown time of the electrolytic cell is longer than the preset time, performing nitrogen replacement on the hydrogen production system; the preset time is 3-12 h.
5. The intermittent and fluctuating electrolytic hydrogen production control method according to claim 2, wherein when the power generation output power is greater than the preset starting power, starting the electrolytic cell to perform electrolytic hydrogen production specifically comprises: and comparing the power generation output power with a preset limit load power of the electrolytic cell, and controlling the input power of the electrolytic cell according to the comparison result of the power generation output power and the preset limit load power, wherein the preset limit load power is 120-200% of the rated power of the electrolytic cell.
6. The intermittent and fluctuating electrolytic hydrogen production control method according to claim 5, wherein controlling the input power of the electrolytic cell according to the comparison result of the power generation output power and the preset limit load power specifically comprises: when the power generation output power is larger than the preset limit load power, controlling the input power of the electrolytic cell to be equal to the preset limit load power; and when the power generation output power is less than the preset limit load power, controlling the input power of the electrolytic cell to be equal to the power generation output power.
7. The intermittent and fluctuating electrolytic hydrogen production control method according to claim 6, wherein when the power generation output power is greater than a preset limit load power, controlling the input power of the electrolytic cell to be equal to the preset limit load power further comprises: and starting the power storage equipment to consume the residual power generation output power.
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| CN202111399620.3A CN114086203A (en) | 2021-11-19 | 2021-11-19 | Intermittent and fluctuating electrolysis hydrogen production control method |
| PCT/CN2022/099163 WO2023087689A1 (en) | 2021-11-19 | 2022-06-16 | Method for controlling intermittent and fluctuating electrolytic hydrogen production |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023087689A1 (en) * | 2021-11-19 | 2023-05-25 | 中国华能集团清洁能源技术研究院有限公司 | Method for controlling intermittent and fluctuating electrolytic hydrogen production |
| WO2023207201A1 (en) * | 2022-04-29 | 2023-11-02 | 阳光氢能科技有限公司 | New energy hydrogen production system and control method therefor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116646993B (en) * | 2023-07-27 | 2023-10-03 | 国网能源研究院有限公司 | Method, system, device and storage medium for measuring and calculating collaboration degree of electric hydrogen coupling system |
| CN116720789B (en) * | 2023-08-08 | 2023-11-07 | 国网能源研究院有限公司 | Hydrogen production electrolytic tank capacity configuration evaluation method, device and equipment |
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| CN108517533A (en) * | 2018-03-26 | 2018-09-11 | 全球能源互联网研究院有限公司 | A kind of electrolytic hydrogen production control method and device |
| CN113249738A (en) * | 2021-05-28 | 2021-08-13 | 全球能源互联网研究院有限公司 | Novel water electrolysis hydrogen production system and operation method thereof |
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| JP4251928B2 (en) * | 2003-06-30 | 2009-04-08 | 株式会社 セテック | Wind power generation water electrolysis hydrogen production system |
| CN112803472A (en) * | 2019-10-28 | 2021-05-14 | 阳光电源股份有限公司 | Direct-current coupling hydrogen production system and control method thereof |
| CN113373477B (en) * | 2021-06-17 | 2023-06-30 | 中国华能集团清洁能源技术研究院有限公司 | Method and system for controlling flow and pressure of electrolyte of dynamic hydrogen production electrolytic tank |
| CN113659632B (en) * | 2021-08-10 | 2024-01-23 | 中国华能集团清洁能源技术研究院有限公司 | Electrolytic hydrogen production system capable of realizing large-scale fluctuation energy consumption and operation method |
| CN114086203A (en) * | 2021-11-19 | 2022-02-25 | 中国华能集团清洁能源技术研究院有限公司 | Intermittent and fluctuating electrolysis hydrogen production control method |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108517533A (en) * | 2018-03-26 | 2018-09-11 | 全球能源互联网研究院有限公司 | A kind of electrolytic hydrogen production control method and device |
| CN113249738A (en) * | 2021-05-28 | 2021-08-13 | 全球能源互联网研究院有限公司 | Novel water electrolysis hydrogen production system and operation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023087689A1 (en) * | 2021-11-19 | 2023-05-25 | 中国华能集团清洁能源技术研究院有限公司 | Method for controlling intermittent and fluctuating electrolytic hydrogen production |
| WO2023207201A1 (en) * | 2022-04-29 | 2023-11-02 | 阳光氢能科技有限公司 | New energy hydrogen production system and control method therefor |
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