CN114507864A - Water electrolysis hydrogen production system and method based on direct current energy supply system - Google Patents
Water electrolysis hydrogen production system and method based on direct current energy supply system Download PDFInfo
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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
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
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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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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
- H02J1/102—Parallel operation of dc sources being switching converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J5/00—Circuit arrangements for transfer of electric power between ac networks and dc networks
Abstract
The invention discloses a water electrolysis hydrogen production system and method based on a direct current energy supply system, and belongs to the technical field of water hydrogen production. The system comprises a high-voltage switch, an isolation transformer, an AC/DC converter, an electrolytic bath and a plurality of DC/DC direct-current transformers; the high-voltage switch, the isolation transformer and the AC/DC converter are sequentially connected in series; the input ends of the plurality of DC/DC direct current transformers are connected with the output end of the AC/DC converter in parallel; the output end of each DC/DC direct current transformer is respectively connected with an independent electrolytic cell to provide electric energy for the electrolytic cell. The technical scheme disclosed by the invention does not need to additionally configure a reactive power compensation device, and has the advantages of high power regulation response speed, stronger adaptability of grid voltage and frequency fluctuation, better adaptability to new energy access and the like; the direct current energy supply system can combine a new energy source and an electrolytic water system to form a flexible and controllable new energy source electrolytic water hydrogen production system.
Description
Technical Field
The invention belongs to the technical field of hydrogen production from water, and particularly relates to a system and a method for producing hydrogen by electrolyzing water based on a direct-current energy supply system.
Background
The hydrogen energy is a secondary energy source which has wide source, cleanness, flexibility and rich application scenes. Hydrogen energy and electric energy which belong to secondary energy can exist in all links of energy production, storage, transportation and consumption; can be applied in the fields of traffic and electric power, and has energy source property. However, hydrogen energy also has properties of raw materials and fuels which cannot be replaced by electric energy, and can be applied to the fields of chemical industry and metallurgy, that is, the hydrogen energy and the electric energy are the most different from the secondary energy with material form. Therefore, hydrogen energy can be used as powerful supplement of clean power in a future high-proportion new energy system, and unique advantages can be played in the energy field.
The existing water electrolysis hydrogen production system is mainly based on a traditional alternating current energy supply and thyristor rectification system and has the defects of poor electric energy quality, weak reactive power supporting capability, long power regulation response time, poor power grid fluctuation adaptability and the like. In order to solve the problems, the patent provides a water electrolysis hydrogen production system based on a direct current energy supply and a direct current transformer, a reactive power compensation device does not need to be additionally configured, and the system has the advantages of high power regulation response speed, stronger power grid voltage and frequency fluctuation adaptability, better adaptation to new energy access and the like.
Disclosure of Invention
In order to solve the problems, the invention provides a system and a method for producing hydrogen by electrolyzing water based on a direct current energy supply system.
The invention provides a water electrolysis hydrogen production system based on a direct current energy supply system, which comprises a high-voltage switch, an isolation transformer, an AC/DC converter, at least one new energy system, an electrolytic bath and a plurality of DC/DC direct current transformers;
the high-voltage switch, the isolation transformer and the AC/DC converter are sequentially connected in series;
the output end of the AC/DC converter is connected with the input ends of the plurality of DC/DC direct current transformers in parallel;
each new energy system output end is connected with a plurality of DC/DC direct current transformer input ends in parallel through a DC/DC direct current transformer; the new energy system comprises a photovoltaic power generation system, a wind power generation system and an energy storage system;
and the output end of each DC/DC direct current transformer in the plurality of DC/DC direct current transformers is respectively connected with an independent electrolytic cell to provide electric energy for the electrolytic cell.
The system also comprises a high-voltage power supply, and the high-voltage power supply is connected with the input end of the high-voltage switch and provides electric energy for the system.
The output end of the AC/DC converter is connected with a plurality of DC/DC direct-current transformers through a medium-voltage direct-current bus;
and the output end of each new energy system is connected with a medium-voltage direct-current bus through a DC/DC direct-current transformer and a plurality of DC/DC direct-current transformers through the medium-voltage direct-current bus.
The DC/DC transformer is a high-power IGBT full-control device; or, the DC/DC transformer is an IGCT full-control device.
The medium-voltage direct-current bus is a +/-10 kV medium-voltage direct-current bus.
The invention also provides a method for producing hydrogen by electrolyzing water based on a direct current energy supply system, which is applied to the system and comprises the following steps:
providing electric energy to the electrolytic cell through at least one new energy system to produce hydrogen from water;
and when the electric energy output by the new energy system cannot meet the voltage requirement of the electrolytic cell, the electrolytic cell gets electricity through a power grid.
The at least one new energy system providing electrical energy to the electrolysis cell comprises:
at least one new energy system is connected with the plurality of DC/DC direct current transformers in parallel through the DC/DC direct current transformers to output electric energy; the output end of each DC/DC direct current transformer in the plurality of DC/DC direct current transformers is respectively connected with an independent electrolytic cell to provide electric energy for the electrolytic cell; the new energy system comprises a photovoltaic power generation system, a wind power generation system and an energy storage system.
The electrolytic cell gets electricity through the electric wire netting and includes:
converting the high-voltage electric energy into low-voltage electric energy through an isolation transformer, and transmitting the low-voltage electric energy to an AC/DC converter;
after the alternating current is converted into the direct current through the AC/DC converter, the alternating current is connected with a plurality of DC/DC direct current transformers in parallel;
the output end of each DC/DC direct current transformer is respectively connected with an independent electrolytic cell to provide electric energy for the electrolytic cell.
The output end of the AC/DC converter is connected with a plurality of DC/DC direct current transformers through a medium-voltage direct current bus;
and the output end of each new energy system is connected with a medium-voltage direct-current bus through a DC/DC direct-current transformer and a plurality of DC/DC direct-current transformers through the medium-voltage direct-current bus.
The medium-voltage direct-current bus is a +/-10 kV medium-voltage direct-current bus.
Compared with the prior art, the technical scheme of the invention has the following advantages:
according to the technical scheme, additional equipment for eliminating resonance and improving the power factor, such as an SCG/SVC auxiliary power supply or an on-load tap changer, is not required to be configured, so that the initial investment cost and the later operation and maintenance cost are reduced; meanwhile, the influence on the grid connection of the new energy power station is reduced; the local reactive compensation is realized, a 35kV side reactive compensation device can be replaced, and the requirement of a power grid on the reactive scheduling of a new energy hydrogen generation station in the future can be met; furthermore, the power fluctuation characteristics of new energy are quickly matched, electricity is prevented from being taken from a power grid, 100% of green hydrogen is ensured, and the hydrogen production cost is reduced; meanwhile, the power grid voltage and frequency fluctuation adaptability is stronger, and the risk caused by uncontrolled output voltage due to power grid fluctuation (particularly in a weak power grid environment) is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a topology structure diagram of a hydrogen production system by electrolyzing water in the prior art.
FIG. 2 is a topological structure diagram of a first water electrolysis hydrogen production system based on a direct current energy supply system in the embodiment of the invention.
FIG. 3 is a topological structure diagram of a second water electrolysis hydrogen production system based on a DC power supply system in the embodiment of the invention.
Fig. 4 is a flow chart of a method for producing hydrogen by electrolyzing water according to an embodiment of the present invention.
Detailed Description
In order to make the objects, 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 with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: the relative arrangement of the components, units, lines and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
The existing water electrolysis hydrogen production system is mainly based on a traditional alternating current energy supply and thyristor rectification system, the topological structure of the system is shown in figure 1, and the system comprises a 10kv or 35kv power supply, a high-voltage switch cabinet, an SVG auxiliary power supply, a rectifier transformer, an on-load tap changer, an alternating current cable, a thyristor rectifier, a cooling water device and an electrolytic bath. Wherein power supply and SVG auxiliary power source are connected with high tension switchgear's input, high tension switchgear's output and rectifier transformer and on-load tap changer are connected, rectifier transformer and on-load tap changer's output is connected with the thyristor rectifier through the interchange cable, the thyristor provides the electric energy and gives the electrolysis trough with hydrogen manufacturing, the cooling water device is passed through the water route and is dispelled the heat for the thyristor rectifier. As can be seen from fig. 1, the overall efficiency of the overall system is 95.57%, the total loss is 237.3kw,
in the traditional water electrolysis hydrogen production system, because the voltage level of an electrolytic cell is generally not higher than 500V, the voltage of 10kV or 35kV needs to be reduced to about 400V low-voltage alternating current through a primary step-down transformer, and then rectification is performed. The capacity of the rectifier is limited to be improved (generally within 5 MW), and in view of the level of the existing power electronic device, a thyristor device with relatively high power level is generally adopted, so that the problems of poor electric energy quality, weak power grid fluctuation adaptability and the like are caused; and because the voltage ratio is lower, the current ratio of the rectifier is larger, and higher loss is brought.
The embodiment of the invention provides a water electrolysis hydrogen production system based on a direct current energy supply system. The topology of the system is shown in FIG. 2, the system comprises a high-voltage switch, an isolation transformer, an AC/DC converter, an electrolytic bath and a plurality of DC/DC direct current transformers; the high-voltage switch, the isolation transformer and the AC/DC converter are sequentially connected in series; the input ends of the plurality of DC/DC direct current transformers are connected with the output end of the AC/DC converter in parallel; the output end of each DC/DC direct current transformer is respectively connected with an independent electrolytic cell to provide electric energy for the electrolytic cell.
The system also comprises a high-voltage power supply, and the high-voltage power supply is connected with the input end of the high-voltage switch and provides electric energy for the system.
And the output end of the AC/DC converter is connected with a plurality of DC/DC direct current transformers through a medium-voltage direct current bus. The DC/DC transformer is a high-power IGBT full-control device; or, the DC/DC transformer is an IGCT full-control device.
As can be seen from FIG. 2, the 10kV or 35kV high-voltage power supply passes through the high-voltage switch cabinet and then is transmitted to the isolation transformer, then is transmitted to the AC/DC converter after being transformed by the isolation transformer, and then outputs a direct current of +10kV and/or-10 kV after being transformed by the AC/DC converter, and then is supplied to the electrolytic cell through the DC/DC direct-current transformer. The supply voltage of the electrolytic cell in the prior art is generally not higher than 500V. In one case, the cell energy requirement is 5 MW. A medium-voltage direct-current bus is constructed after the AC/DC converter outputs, the defect of a rectifier caused by low direct-current voltage of the electrolytic cell is overcome, and electric energy can be provided for the electrolytic cell through the DC/DC direct-current transformer. The system described in fig. 2 reduces the loss in power and facilitates capacity expansion compared to the prior art.
It can be seen that, in order to avoid the disadvantage of rectifier brought by lower direct voltage of the electrolytic cell, the invention firstly constructs a +/-10 kV medium-voltage direct current bus based on an AC/DC converter, so that the electrolytic cell can supply energy through a DC/DC direct current transformer with an input-series output-parallel structure, the DC/DC direct current transformer can be realized by adopting high-power IGBT and IGCT full-control devices, and the invention not only can provide a reactive compensation function, but also has the advantages of high power regulation response speed, strong power grid voltage and frequency fluctuation adaptability and the like; and can realize the supply of 10 MW-level electrolytic energy, and can greatly improve the capacity of the electrolytic cell.
The patent embodiment of the invention provides a second water electrolysis hydrogen production system based on a direct current energy supply system. The topology of the system is shown in fig. 3, the system comprises a high-voltage switch, an isolation transformer, an AC/DC converter, at least one new energy system, an electrolysis cell and a plurality of DC/DC direct current transformers; the high-voltage switch, the isolation transformer and the AC/DC converter are sequentially connected in series; the output end of the AC/DC converter is connected with the input ends of the plurality of DC/DC direct current transformers in parallel; the output end of each new energy system is connected with the input ends of the plurality of DC/DC direct current transformers in parallel through the DC/DC direct current transformers; the new energy system comprises a photovoltaic power generation system, a wind power generation system and an energy storage system; and the output end of each DC/DC direct current transformer in the plurality of DC/DC direct current transformers is respectively connected with an independent electrolytic cell to provide electric energy for the electrolytic cell.
The system also comprises a high-voltage power supply, and the high-voltage power supply is connected with the input end of the high-voltage switch and provides electric energy for the system. The output end of the AC/DC converter is connected with a plurality of DC/DC direct current transformers through a medium-voltage direct current bus; and the output end of each new energy system is connected with the medium-voltage direct-current bus through the DC/DC direct-current transformer and is connected with the plurality of DC/DC direct-current transformers through the medium-voltage direct-current bus. The DC/DC transformer is a high-power IGBT full-control device; or, the DC/DC transformer is an IGCT full-control device.
The medium-voltage direct-current bus is a +/-10 kV medium-voltage direct-current bus. The supply voltage of the electrolytic cell in the prior art is generally not higher than 500V. In one case, the cell energy requirement is 5 MW.
As can be seen from FIG. 3, a 10kV or 35kV high-voltage power supply passes through the high-voltage switch cabinet and then is transmitted to the isolation transformer, then is transmitted to the AC/DC converter after being transformed by the isolation transformer, and then is output to form a +10kV and/or-10 kV medium-voltage direct-current bus after being transformed by the AC/DC converter, and then is supplied to the electrolytic cell through the DC/DC direct-current transformer.
The photovoltaic power generation system is connected with the DC/DC direct current transformers and then is connected with the plurality of DC/DC direct current transformers in parallel through the medium-voltage direct current bus; each of the plurality of DC/DC direct current transformers is connected with an electrolytic bath; therefore, the photovoltaic power generation system can provide electric energy for the electrolytic cell by combining the medium-voltage direct-current bus with the DC/DC direct-current transformer, and green electrolysis water hydrogen production is realized.
The wind power generation system is connected with the DC/DC direct current transformers and then is connected with the plurality of DC/DC direct current transformers in parallel through the medium-voltage direct current bus; each of the plurality of DC/DC direct current transformers is connected with an electrolytic bath; therefore, the wind power generation system can provide electric energy for the electrolytic cell by combining the medium-voltage direct-current bus with the DC/DC direct-current transformer, and green electrolysis water hydrogen production is realized.
The energy storage system is connected with the DC/DC direct current transformers and then connected with the plurality of DC/DC direct current transformers in parallel through the medium-voltage direct current bus; each of the plurality of DC/DC direct current transformers is connected with an electrolytic bath; thus, the energy storage system can provide electric energy for the electrolytic cell by combining the medium-voltage direct-current bus with the DC/DC direct-current transformer.
It can be seen that, on the basis of the water electrolysis hydrogen production system shown in fig. 2, the water electrolysis hydrogen production system shown in fig. 3 can be more efficiently and flexibly connected to the wind power generation system, the photovoltaic power generation system and the energy storage system, and an efficient and flexible energy supply way is provided for new energy water electrolysis hydrogen production. The direct-current energy supply system can combine a new energy source and an electrolytic water system to form a flexible and controllable new energy source electrolytic water hydrogen production system.
Further, compared with the system of "dc power supply + dc transformer" provided in the embodiment of the present invention, the difference points and advantages of the system of "dc power supply + dc transformer" are shown in the following table:
the comparison analysis is carried out on the four aspects of the electric energy quality, the reactive power supporting capability, the power regulation response time and the power grid fluctuation adaptive capability in the table above, and it can be seen that the harmonic wave, the power factor, the reactive power supporting capability, the power regulation response time and the voltage and frequency fluctuation adaptive time are obviously improved.
The embodiment of the invention also provides a method for producing hydrogen by electrolyzing water based on a direct current energy supply system, which is applied to the system, and as shown in the flow chart of fig. 4, the method comprises the following steps: providing electric energy to the electrolytic cell through at least one new energy system to produce hydrogen from water; and when the electric energy output by the new energy system cannot meet the voltage requirement of the electrolytic cell, the electrolytic cell gets electricity through a power grid.
The at least one new energy system providing electrical energy to the electrolysis cell comprises: at least one new energy system is connected with the plurality of DC/DC direct-current transformers in parallel through the DC/DC direct-current transformers to output electric energy; the output end of each DC/DC direct current transformer in the plurality of DC/DC direct current transformers is respectively connected with an independent electrolytic cell to provide electric energy for the electrolytic cell; the new energy system comprises a photovoltaic power generation system, a wind power generation system and an energy storage system.
The electrolytic cell gets electricity through the electric wire netting and includes: converting the high-voltage electric energy into low-voltage electric energy through an isolation transformer, and transmitting the low-voltage electric energy to an AC/DC converter; after the alternating current is converted into the direct current through the AC/DC converter, the alternating current is connected with a plurality of DC/DC direct current transformers in parallel; the output end of each DC/DC direct current transformer is respectively connected with an independent electrolytic cell to provide electric energy for the electrolytic cell.
The output end of the AC/DC converter is connected with a plurality of DC/DC direct current transformers through a medium-voltage direct current bus; and the output end of each new energy system is connected with the medium-voltage direct-current bus through the DC/DC direct-current transformer and is connected with the plurality of DC/DC direct-current transformers through the medium-voltage direct-current bus.
The medium-voltage direct-current bus is a +/-10 kV medium-voltage direct-current bus. The supply voltage of the electrolytic cell in the prior art is generally not higher than 500V. In one case, the cell energy requirement is 5 MW.
In one case, the output end of the AC/DC converter outputs +10kV and/or-10 kV direct current, and is connected with a plurality of DC/DC direct current transformers in parallel through a medium-voltage direct current bus. And the output end of each DC/DC direct current transformer supplies power to the independent electrolytic cell.
The new energy system provided by the embodiment of the invention is used as a main energy supply system of the electrolytic cell, and when the electric energy provided by the new energy system cannot meet the electric energy demand of the electrolytic cell, the electrolytic cell can take electricity through a power grid. The voltage requirements of prior art electrolyzers are typically less than or equal to 500V. In one case, the energy demand of the electrolyzer is 5MW, but if the new energy system supplies too little energy to the electrolyzer, for example, the energy is reduced by 20% to 4MW, the electrolyzer is obviously not sufficiently supplied, and it is necessary to take electricity from the grid as a supplement or to switch from the new energy system to the grid independent supply directly. The energy requirements of the cells will vary with advances in technology or system, and in other cases the cells may reach 10MW, and will not be described further.
The method for producing hydrogen from water provided by the embodiment of the invention has the advantages that the loss is reduced, the efficiency is improved, meanwhile, a new energy power supply system is further added, the wind power generation system, the photovoltaic power generation system and the energy storage system are flexibly connected, and an efficient and flexible energy supply way is provided for the new energy hydrogen production from water electrolysis.
Although some specific embodiments of the present invention have been described in detail by way of illustration, it should be understood by those skilled in the art that the above illustration is only for the purpose of illustration and is not intended to limit the scope of the invention. It will be understood by those skilled in the art that various changes may be made in the above embodiments and equivalents may be substituted for elements thereof without departing from the scope and spirit of the invention.
Claims (10)
1. The system for producing hydrogen by electrolyzing water based on a direct-current energy supply system is characterized by comprising a high-voltage switch, an isolation transformer, an AC/DC converter, at least one new energy system, an electrolytic cell and a plurality of DC/DC direct-current transformers;
the high-voltage switch, the isolation transformer and the AC/DC converter are sequentially connected in series;
the output end of the AC/DC converter is connected with the input ends of the plurality of DC/DC direct current transformers in parallel;
each new energy system output end is connected with a plurality of DC/DC direct current transformer input ends in parallel through a DC/DC direct current transformer; the new energy system comprises a photovoltaic power generation system, a wind power generation system and an energy storage system;
and the output end of each DC/DC direct current transformer in the plurality of DC/DC direct current transformers is respectively connected with an independent electrolytic cell to provide electric energy for the electrolytic cell.
2. The system of claim 1, further comprising a high voltage power supply connected to the input of the high voltage switch for providing power to the system.
3. The system of claim 1, wherein the AC/DC converter outputs are connected to a plurality of DC/DC transformers via a medium voltage DC bus;
and the output end of each new energy system is connected with a medium-voltage direct-current bus through a DC/DC direct-current transformer and then connected with a plurality of DC/DC direct-current transformers through the medium-voltage direct-current bus.
4. The system of claim 1, wherein the DC/DC transformer is a high power IGBT fully controlled device; or, the DC/DC transformer is an IGCT full-control device.
5. The system of claim 3, wherein:
the medium-voltage direct-current bus is a +/-10 kV medium-voltage direct-current bus.
6. A method for producing hydrogen by electrolyzing water based on a direct current energy supply system, which is applied to the system of any one of claims 1-5, and comprises the following steps:
providing electric energy to the electrolytic cell through at least one new energy system to produce hydrogen from water;
and when the electric energy output by the new energy system cannot meet the voltage requirement of the electrolytic cell, the electrolytic cell gets electricity through a power grid.
7. The method of claim 6, wherein the at least one new energy system providing electrical energy to the electrolyzer comprises:
at least one new energy system is connected with the plurality of DC/DC direct current transformers in parallel through the DC/DC direct current transformers to output electric energy; the output end of each DC/DC direct current transformer in the plurality of DC/DC direct current transformers is respectively connected with an independent electrolytic cell to provide electric energy for the electrolytic cell; the new energy system comprises a photovoltaic power generation system, a wind power generation system and an energy storage system.
8. The method of claim 7, wherein the drawing electricity from the electrolyzer from the power grid comprises:
converting the high-voltage electric energy into low-voltage electric energy through an isolation transformer, and transmitting the low-voltage electric energy to an AC/DC converter;
after the alternating current is converted into the direct current through the AC/DC converter, the alternating current is connected with a plurality of DC/DC direct current transformers in parallel;
the output end of each DC/DC direct current transformer is respectively connected with an independent electrolytic cell to provide electric energy for the electrolytic cell.
9. The method of claim 8, wherein the AC/DC converter outputs are connected to a plurality of DC/DC transformers via a medium voltage DC bus;
and the output end of each new energy system is connected with a medium-voltage direct-current bus through a DC/DC direct-current transformer and then connected with a plurality of DC/DC direct-current transformers through the medium-voltage direct-current bus.
10. The method of claim 9, wherein the medium voltage dc bus is a ± 10kV medium voltage dc bus.
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| WO2024041711A1 (en) * | 2022-08-24 | 2024-02-29 | Vestas Wind Systems A/S | Improved power-to-x network architecture |
| CN115642619A (en) * | 2022-10-12 | 2023-01-24 | 无锡隆基氢能科技有限公司 | Renewable energy hydrogen production system, control method thereof and storage medium |
| CN115642619B (en) * | 2022-10-12 | 2024-04-05 | 无锡隆基氢能科技有限公司 | Renewable energy hydrogen production system, control method thereof and storage medium |
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