CN111224426B - Photovoltaic off-grid hydrogen generation station and power supply control method thereof - Google Patents
Photovoltaic off-grid hydrogen generation station and power supply control method thereof Download PDFInfo
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- CN111224426B CN111224426B CN202010104215.3A CN202010104215A CN111224426B CN 111224426 B CN111224426 B CN 111224426B CN 202010104215 A CN202010104215 A CN 202010104215A CN 111224426 B CN111224426 B CN 111224426B
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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
- 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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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Abstract
The application discloses a photovoltaic off-grid hydrogen production station and a power supply control method thereof, which are used for realizing safe hydrogen production. The photovoltaic off-grid hydrogen generation station comprises a hydrogen involved system and a non-hydrogen involved system; the hydrogen-involving system is integrated within one or more containers and the non-hydrogen-involving system is integrated within another one or more containers; a certain safety distance is arranged between the container integrating the hydrogen-involved system and the container integrating the non-hydrogen-involved system, the distance between the containers integrating the hydrogen-involved system is smaller than the safety distance, and the distance between the containers integrating the non-hydrogen-involved system is also smaller than the safety distance; the hydrogen-involved system comprises hydrogen production tanks, hydrogen storage tanks and oxygen storage tanks, wherein the hydrogen production tanks and the oxygen storage tanks are arranged outside the containers; the internal components of the non-hydrogen-involved system are devices which are not in direct contact with hydrogen.
Description
Technical Field
The invention relates to the technical field of hydrogen production, in particular to a photovoltaic off-grid hydrogen production station and a power supply control method thereof.
Background
Hydrogen energy is a secondary energy with wide source, green and high efficiency, and occupies an increasingly important position in the field of new energy. The hydrogen production is the primary technical link in the hydrogen energy utilization process, the most widely applied hydrogen production scheme at present is photovoltaic off-grid hydrogen production, and the working principle is that photovoltaic off-grid power generation is supplied to a hydrogen production tank for water electrolysis hydrogen production.
However, hydrogen is one of the most flammable and explosive gases in the world, so the photovoltaic off-grid hydrogen production station must ensure the safety of hydrogen production during design.
Disclosure of Invention
In view of the above, the invention provides a photovoltaic off-grid hydrogen production station and a power supply control method thereof, so as to realize safe hydrogen production.
A photovoltaic off-grid hydrogen generation station comprises a hydrogen involved system and a non-hydrogen involved system; the hydrogen-involving system is integrated within one or more containers and the non-hydrogen-involving system is integrated within another one or more containers;
a certain safety distance is arranged between the container integrating the hydrogen-involved system and the container integrating the non-hydrogen-involved system, the distance between the containers integrating the hydrogen-involved system is smaller than the safety distance, and the distance between the containers integrating the non-hydrogen-involved system is also smaller than the safety distance;
the hydrogen-involved system comprises hydrogen production tanks, hydrogen storage tanks and oxygen storage tanks, wherein the hydrogen production tanks and the oxygen storage tanks are arranged outside the containers;
the internal components of the non-hydrogen-involved system are devices which are not in direct contact with hydrogen.
Optionally, the distance between the containers integrating the hydrogen-related system is smaller than the safety distance, and the method includes: a plurality of containers integrating the hydrogen-involving system are placed side by side next to each other or stacked;
the distance between the containers integrating the non-hydrogen-related system is smaller than the safety distance, and the method comprises the following steps: a plurality of containers integrating the non-hydrogen-involving system are placed side-by-side next to each other or stacked.
Optionally, each container in the photovoltaic off-grid hydrogen generation station is a standard container.
Optionally, the non-hydrogen-related system includes a first DC/DC converter, a second DC/DC converter, a DC/AC converter, an energy storage battery, a central controller, and a plurality of non-hydrogen-related AC power devices, where:
the input ends of the first DC/DC converter and the second DC/DC converter are connected to a common direct current bus in parallel, and photovoltaic off-grid power generation is injected to the common direct current bus;
the output end of the first DC/DC converter is connected to the input end of the hydrogen production tank;
the output end of the second DC/DC converter is connected to the input end of the DC/AC converter and the energy storage battery;
the output end of the DC/AC converter is connected with each hydrogen production alternating current electric device, and each hydrogen production alternating current electric device comprises a hydrogen-related alternating current electric device and a plurality of non-hydrogen-related alternating current electric devices, wherein the hydrogen-related alternating current electric devices are arranged in a hydrogen-related system, and the non-hydrogen-related alternating current electric devices are arranged in a non-hydrogen-related system;
and the central controller performs centralized control on the whole photovoltaic off-grid hydrogen generation station.
Optionally, the non-hydrogen-involved alternating current electric equipment comprises a circulating cooling water system, an air compressor and a reverse osmosis device, and the circulating cooling water system, the air compressor and the reverse osmosis device are all connected into the hydrogen-involved system through pipelines.
Optionally, the recirculating cooling water system adopts a combination of a water-air radiator and a water chilling unit, the water-air radiator is arranged at the top of the container, and the rest components in the non-hydrogen-related system and all the components of the hydrogen-related system are integrated inside the container.
Optionally, the central controller is configured to control the water-air radiator to separately provide circulating cooling water for the hydrogen-related system when the ambient temperature is lower than a preset value, and control the water-air radiator and the water chilling unit to simultaneously provide circulating cooling water for the hydrogen-related system when the ambient temperature is not lower than the preset value.
Optionally, the photovoltaic off-grid power generation is output by a photovoltaic array; or the photovoltaic off-grid power generation is one-way output formed by converging multi-way photovoltaic array output through a combiner box.
Optionally, the central controller includes:
the MPPT control unit is used for carrying out MPPT control on the photovoltaic cell panel;
the power detection unit is used for detecting total power P0 converged on the common direct current bus;
the comparison unit is used for comparing the total power P0 converged on the common direct current bus with the starting power P1 of the hydrogen production tank and the rated power P2 of the hydrogen production tank;
the execution unit is used for completely using the total power P0 converged on the common direct current bus to charge the energy storage battery and/or supply power to hydrogen production alternating current electric equipment when the total power P0 on the common direct current bus is less than the starting power P1 of the hydrogen production tank; when the rated power P2 of the hydrogen production cell is more than or equal to the total power P0 converged on the common direct current bus is more than or equal to the starting power P1 of the hydrogen production cell, the total power P0 on the common direct current bus is used for supplying power to the hydrogen production cell, and the energy of the energy storage battery is used for supplying power to the hydrogen production alternating current power equipment; when the total power P0 converged on the common direct current bus is greater than the rated power P2 of the hydrogen production cell, the power P2 is extracted from the total power P0 converged on the common direct current bus to supply power to the hydrogen production cell, and the rest power is used for charging the energy storage battery, charging the energy storage battery and/or supplying power to hydrogen production alternating current electric equipment.
A power supply control method of a photovoltaic off-grid hydrogen generation station is applied to a central controller in any one of the photovoltaic off-grid hydrogen generation stations, and comprises the following steps:
carrying out MPPT control on the photovoltaic cell panel, and detecting total power P0 converged on the common direct current bus;
comparing the total power P0 converged on the common direct current bus with the starting power P1 of the hydrogen production tank and the rated power P2 of the hydrogen production tank;
when the total power P0 on the common direct current bus is less than the starting power P1 of the hydrogen production cell, the total power P0 converged on the common direct current bus is completely used for charging the energy storage battery and/or supplying power to hydrogen production alternating current electric equipment;
when the rated power P2 of the hydrogen production cell is more than or equal to the total power P0 converged on the common direct current bus is more than or equal to the starting power P1 of the hydrogen production cell, the total power P0 on the common direct current bus is used for supplying power to the hydrogen production cell, and the energy of the energy storage battery is used for supplying power to the hydrogen production alternating current power equipment;
when the total power P0 converged on the common direct current bus is greater than the rated power P2 of the hydrogen production cell, the power P2 is extracted from the total power P0 converged on the common direct current bus to supply power to the hydrogen production cell, and the rest power is used for charging an energy storage battery and/or supplying power to hydrogen production alternating current power equipment.
According to the technical scheme, the hydrogen production station is designed into a container type, so that the system integration level is improved. In order to meet the requirement of the safety specification of the hydrogen generating station, a certain safety distance must be separated between the hydrogen-involved devices and the non-hydrogen-involved devices, if both the hydrogen-involved devices and the non-hydrogen-involved devices are arranged in each container occupied by the hydrogen generating station, a certain safety distance is separated between the containers, so that the occupied area of the hydrogen generating station is greatly increased.
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 described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a photovoltaic off-grid hydrogen generation station disclosed in an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of another photovoltaic off-grid hydrogen generation station disclosed in the embodiment of the present invention;
FIG. 3 is a schematic structural diagram of another photovoltaic off-grid hydrogen generation station disclosed in the embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a central controller according to an embodiment of the present invention;
fig. 5 is a flowchart of a power supply control method for a photovoltaic off-grid hydrogen generation station according to an embodiment of the present invention.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Referring to fig. 1, an embodiment of the present invention discloses a photovoltaic off-grid hydrogen generation station, including a hydrogen-involved system and a non-hydrogen-involved system, wherein the hydrogen-involved system is integrated in one or more containers, and the non-hydrogen-involved system is integrated in another one or more containers, and the containers are represented by dashed boxes in fig. 1.
The internal components of the hydrogen-involved system are all devices (hereinafter referred to as "hydrogen-involved devices") which are in direct contact with hydrogen in a hydrogen production station, such as a hydrogen production tank, and hydrogen and oxygen produced in the hydrogen production tank are conveyed to a hydrogen/oxygen storage tank outside a container.
The internal components of the non-hydrogen-involved system are devices (hereinafter referred to as "non-hydrogen-involved devices") which are not in direct contact with hydrogen in the hydrogen production station, such as the first DC/DC converter 10 for converting photovoltaic off-grid power generation and supplying the converted power to the hydrogen production tank.
According to the embodiment of the invention, the hydrogen-involved system and the non-hydrogen-involved system are both designed into the container type, so that the system integration level is improved, the civil construction of the hydrogen station is simplified, and the construction period of the hydrogen station is greatly shortened.
In practical application, the number of containers occupied by each of the hydrogen-involved system and the non-hydrogen-involved system is determined by the scale of the system, and fig. 1 only takes the case that one container is occupied by each of the hydrogen-involved system and the non-hydrogen-involved system as an example. The spacing between containers is limited as follows: and a certain safety distance is arranged between the container integrating the hydrogen-involved system and the container integrating the non-hydrogen-involved system, the distance between the containers integrating the hydrogen-involved system is smaller than the safety distance, and the distance between the containers integrating the non-hydrogen-involved system is also smaller than the safety distance.
Specifically, the embodiment of the invention separately places the hydrogen-related devices and the non-hydrogen-related devices in different containers, and limits the distance between the containers according to the requirements, firstly, for safety, and secondly, for saving the floor area of the hydrogen production station. The specific analysis is as follows: the hydrogen is one of the most flammable and explosive gases in the world, and in order to meet the safety specification requirement of a hydrogen production station, a certain safety distance is required between a hydrogen-related device and a non-hydrogen-related device, if the hydrogen-related device and the non-hydrogen-related device are arranged in each container occupied by the hydrogen production station, a certain safety distance is required between all containers occupied by the hydrogen production station, which greatly increases the occupied area of the hydrogen production station, and in the embodiment of the invention, all the hydrogen-related devices are arranged in one or more containers, and all the non-hydrogen-related devices are arranged in another one or more containers, so that only a certain safety distance (the safety distance is equal to the safety distance between the hydrogen-related device and the non-hydrogen-related device specified in the national standard, and is generally between 4 and 5 meters) is required between the containers where the non-hydrogen-related devices are arranged, and the containers where the non-hydrogen-related devices are arranged can be compactly (for example, the containers are arranged side by side or stacked side by side Put), the containers that the hydrogen-related device is located also can compactly place (for example, side by side and side by side or pile up and put), thereby greatly saving the area occupied by the hydrogen station and ensuring the safety of hydrogen production.
Optionally, the containers in the embodiments of the present invention all use standard containers, such as international standard containers or national standard containers, which are favorable for transportation. The international standard container is an international standard container which is constructed and used according to an international standard defined by the technical commission of the international organization for standardization (ISO) 104. The national standard container is a standard container which is generally used by the country and is made by referring to international standards by governments of various countries and considering the specific situation of the country.
Next, an internal structure design of the non-hydrogen-related system is provided in the embodiment of the present invention, and is specifically described as follows.
Still referring to fig. 1, the non-hydrogen-involving system internal components include: the system comprises a first DC/DC converter 1, a second DC/DC converter 2, a DC/AC converter 3, an energy storage battery 4, a central controller 5 and a plurality of non-hydrogen-related alternating current electric devices, wherein:
the input ends of the first DC/DC converter 1 and the second DC/DC converter 2 are connected in parallel to a common direct current bus, and photovoltaic off-grid power generation is injected to the common direct current bus;
the output end of the first DC/DC converter 1 is connected to the input end of the hydrogen production tank;
the output end of the second DC/DC converter 2 is connected with the input end of the DC/AC converter 3 and the energy storage battery 4;
the output end of the DC/AC converter 3 is connected with each hydrogen production alternating current electric device, and the hydrogen production alternating current electric devices comprise hydrogen-related alternating current electric devices and a plurality of non-hydrogen-related alternating current electric devices, wherein the hydrogen-related alternating current electric devices are arranged in a hydrogen-related system, and the non-hydrogen-related alternating current electric devices are arranged in a non-hydrogen-related system;
the central controller 5 centrally controls the entire photovoltaic off-grid hydrogen generation station (fig. 1 shows only the connections between the central controller 5 and the first DC/DC converter 1, the second DC/DC converter 2, and the DC/AC converter 3).
Optionally, in any of the above-disclosed photovoltaic off-grid hydrogen generation stations, the photovoltaic off-grid power generation may be output by one photovoltaic array; alternatively, the photovoltaic off-grid power generation may be one-way output formed by converging multiple photovoltaic array outputs through a combiner box, as shown in fig. 1, the power levels of the photovoltaic outputs may be equal or different, and are not limited.
Optionally, in any one of the photovoltaic off-grid hydrogen generation stations disclosed above, referring to fig. 2, the non-hydrogen-related ac power equipment includes a circulating cooling water system 6, an air compressor 7 and a reverse osmosis device 8, and the circulating cooling water system 6, the air compressor 7 and the reverse osmosis device 8 are all connected to the hydrogen-related system through pipelines.
The hydrogen production system comprises a hydrogen production tank, the hydrogen production tank utilizes direct current to carry out water electrolysis, the water electrolysis raw material is demineralized water, the water supply amount is different according to the size of the hydrogen production scale, and the hydrogen production reaction formula is adopted
It is known that 1mol of demineralized water is required to generate 1mol of hydrogen. And the reverse osmosis device 8 is used for desalting seawater or preparing the desalted water. The air compressor 7 is used for providing an instrument air source for the hydrogen-related system. As the water electrolysis process is a heat release process, in order to ensure the stable working temperature of the hydrogen production tank, a circulating cooling water system 6 needs to be arranged for the hydrogen production tank, and the circulating cooling water system 6 provides circulating cooling water for the hydrogen production tank. In addition, a hydrogen purification device is usually included in the hydrogen-related system, and the hydrogen purification device also needs to circulate cooling water to reduce the product temperature, and the hydrogen purification device is usually a PSA (Pressure Swing Adsorption) purification device.
Alternatively, as shown in fig. 3, the embodiment of the present invention recommends that the recirculating cooling water system 6 adopts a combination of a water-wind radiator 10 and a water chilling unit 9, the water-wind radiator 10 is arranged on the top of the container, and the rest of the components in the hydrogen-involved system and the non-hydrogen-involved system are all integrated inside the container.
Wherein, through adopting the mode of water wind radiator 10 and the 9 combinations of cooling water set to provide recirculated cooling water for wading the hydrogen system, it is specific: under the control of the central controller 5, when the ambient temperature is lower than a preset value, only the water-air radiator 10 is adopted to provide circulating cooling water for the hydrogen-involved system, and when the ambient temperature is not lower than the preset value, the water-air radiator 10 and the water chilling unit 9 are simultaneously adopted to provide circulating cooling water for the hydrogen-involved system. For example, when the environmental temperature is low, only the water-air radiator 10 is used for providing circulating cooling water for the hydrogen production tank and the hydrogen purification device, when the environmental temperature is high, the water chilling unit 9 is used for providing circulating cooling water for the hydrogen purification device in the hydrogen-related system, the water-air radiator 10 is used for providing circulating cooling water for the hydrogen production tank and the water chilling unit 9, so that the working requirement of the hydrogen purification device can be met, the water chilling unit 9 only provides circulating cooling water for the hydrogen purification device, the unit capacity does not need to be large, and the overall energy consumption and investment cost of the circulating cooling water system 6 can be greatly reduced on the premise of ensuring the stable operation of the hydrogen production system.
Optionally, in any of the photovoltaic off-grid hydrogen generation stations disclosed above, when the number of hydrogen generation AC electric devices is large, one AC power distribution cabinet may be configured between the DC/AC converter 3 and each hydrogen generation AC electric device.
Optionally, in any of the above-disclosed photovoltaic off-grid hydrogen generation stations, the hydrogen generation tank may be a lye electrolyzer, a PEM (Proton Exchange Membrane) electrolyzer or a solid oxide electrolyzer, but is not limited thereto.
Optionally, in order to realize energy optimization management of any one of the photovoltaic off-grid hydrogen generation stations disclosed above, as shown in fig. 4, the central controller 5 specifically includes:
an MPPT control unit 100 configured to perform MPPT control on the photovoltaic panel;
a power detection unit 200, configured to detect a total power P0 imported onto the common dc bus;
the comparison unit 300 is used for comparing the total power P0 converged on the common direct current bus with the starting power P1 of the hydrogen production tank and the rated power P2 of the hydrogen production tank;
the execution unit 400 is used for completely using the total power P0 converged on the common direct-current bus to charge the energy storage battery and/or supply power to hydrogen-production alternating-current power equipment when the total power P0 on the common direct-current bus is less than the starting power P1 of the hydrogen production cell; when the rated power P2 of the hydrogen production cell is more than or equal to the total power P0 converged on the common direct current bus is more than or equal to the starting power P1 of the hydrogen production cell, the total power P0 on the common direct current bus is used for supplying power to the hydrogen production cell, and the energy of the energy storage battery is used for supplying power to the hydrogen production alternating current power equipment; when the total power P0 converged on the common direct current bus is greater than the rated power P2 of the hydrogen production cell, the power P2 is extracted from the total power P0 converged on the common direct current bus to supply power to the hydrogen production cell, and the rest power is used for charging an energy storage battery and/or supplying power to hydrogen production alternating current power equipment.
Corresponding to the technical scheme shown in fig. 4, the embodiment of the invention also discloses a power supply control method for the photovoltaic off-grid hydrogen generation station, which is applied to the central controller 5, and as shown in fig. 5, the power supply control method comprises the following steps:
step S01: MPPT (Maximum Power Point Tracking) control is carried out on the photovoltaic cell panel, and the total Power P0 converged on the common direct current bus is detected.
Step S02: comparing the total power P0 converged on the common direct current bus with the starting power P1 of the hydrogen production tank and the rated power P2 of the hydrogen production tank; when the total power P0 on the common direct current bus is less than the starting power P1 of the hydrogen making cell, the step S03 is carried out; when the rated power P2 of the hydrogen production cell is more than or equal to the total power P0 converged on the common direct current bus is more than or equal to the starting power P1 of the hydrogen production cell, the step S04 is carried out; and when the total power P0 imported to the common direct current bus is larger than the rated power P2 of the hydrogen production cell, the step S05 is carried out.
Step S03: the total power P0 converged on the common direct current bus is used for charging an energy storage battery and/or supplying power to hydrogen production alternating current electric equipment; thereafter, the process returns to step S01.
Step S04: the total power P0 on the common direct current bus is used for supplying power to the hydrogen production cell, and the energy of the energy storage battery is used for supplying power to the hydrogen production alternating current power equipment; thereafter, the process returns to step S01.
Step S05: and extracting P2 power from the total power P0 converged into the common direct current bus to supply power to the hydrogen production cell, so that the hydrogen production cell works in a rated power state, the rest power is used for charging the energy storage battery and/or supplying power to hydrogen production alternating current electric equipment, and then returning to the step S01.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the method disclosed by the embodiment, the method corresponds to the product disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the product part for description.
In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the use of the verb "comprise a" to define an element does not exclude the presence of another, identical element in a process, method, article, or apparatus that comprises the element.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the embodiments. Thus, the present embodiments are not intended to be limited to the embodiments shown herein but are to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A photovoltaic off-grid hydrogen generation station is characterized by comprising a hydrogen involved system and a non-hydrogen involved system; the hydrogen-involving system is integrated within one or more containers and the non-hydrogen-involving system is integrated within another one or more containers;
a certain safety distance is arranged between the container integrating the hydrogen-involved system and the container integrating the non-hydrogen-involved system, the distance between the containers integrating the hydrogen-involved system is smaller than the safety distance, and the distance between the containers integrating the non-hydrogen-involved system is also smaller than the safety distance;
the hydrogen-involved system comprises hydrogen production tanks, hydrogen storage tanks and oxygen storage tanks, wherein the hydrogen production tanks and the oxygen storage tanks are arranged outside the containers;
the internal components of the non-hydrogen-involved system are devices which are not in direct contact with hydrogen.
2. The photovoltaic off-grid hydrogen generation station of claim 1, wherein the spacing between the containers integrating the hydrogen-related system is less than the safety distance, comprising: a plurality of containers integrating the hydrogen-involving system are placed side by side next to each other or stacked;
the distance between the containers integrating the non-hydrogen-related system is smaller than the safety distance, and the method comprises the following steps: a plurality of containers integrating the non-hydrogen-involving system are placed side-by-side next to each other or stacked.
3. The photovoltaic off-grid hydrogen generation station of claim 1, wherein each container in the photovoltaic off-grid hydrogen generation station is a standard container.
4. The photovoltaic off-grid hydrogen generation station of claim 1, wherein the non-hydrogen-related system comprises a first DC/DC converter, a second DC/DC converter, a DC/AC converter, an energy storage battery, a central controller, and a number of non-hydrogen-related AC electrical devices, wherein:
the input ends of the first DC/DC converter and the second DC/DC converter are connected to a common direct current bus in parallel, and photovoltaic off-grid power generation is injected to the common direct current bus;
the output end of the first DC/DC converter is connected to the input end of the hydrogen production tank;
the output end of the second DC/DC converter is connected to the input end of the DC/AC converter and the energy storage battery;
the output end of the DC/AC converter is connected with each hydrogen production alternating current electric device, and each hydrogen production alternating current electric device comprises a hydrogen-related alternating current electric device and a plurality of non-hydrogen-related alternating current electric devices, wherein the hydrogen-related alternating current electric devices are arranged in a hydrogen-related system, and the non-hydrogen-related alternating current electric devices are arranged in a non-hydrogen-related system;
and the central controller performs centralized control on the whole photovoltaic off-grid hydrogen generation station.
5. The photovoltaic off-grid hydrogen generation station of claim 4, wherein the non-hydrogen-related AC electrical equipment comprises a recirculating cooling water system, an air compressor and a reverse osmosis device, and the recirculating cooling water system, the air compressor and the reverse osmosis device are all connected into the hydrogen-related system through pipelines.
6. The photovoltaic off-grid hydrogen generation station of claim 5, wherein the recirculating cooling water system employs a combination of a water-wind radiator and a water chilling unit, the water-wind radiator is disposed on top of the container, and the rest of the non-hydrogen-involved system and all components of the hydrogen-involved system are integrated inside the container.
7. The photovoltaic off-grid hydrogen generation station of claim 6, wherein the central controller is configured to control the water-air radiator to provide circulating cooling water for the hydrogen-related system independently when an ambient temperature is lower than a preset value, and control the water-air radiator and the water chiller to provide circulating cooling water for the hydrogen-related system simultaneously when the ambient temperature is not lower than the preset value.
8. The photovoltaic off-grid hydrogen generation station of any of claims 4-7, wherein the central controller comprises:
the MPPT control unit is used for carrying out MPPT control on the photovoltaic cell panel;
the power detection unit is used for detecting total power P0 converged on the common direct current bus;
the comparison unit is used for comparing the total power P0 converged on the common direct current bus with the starting power P1 of the hydrogen production tank and the rated power P2 of the hydrogen production tank;
the execution unit is used for completely using the total power P0 converged on the common direct current bus to charge the energy storage battery and/or supply power to hydrogen production alternating current electric equipment when the total power P0 on the common direct current bus is less than the starting power P1 of the hydrogen production tank; when the rated power P2 of the hydrogen production cell is more than or equal to the total power P0 converged on the common direct current bus is more than or equal to the starting power P1 of the hydrogen production cell, the total power P0 on the common direct current bus is used for supplying power to the hydrogen production cell, and the energy of the energy storage battery is used for supplying power to the hydrogen production alternating current power equipment; when the total power P0 converged on the common direct current bus is greater than the rated power P2 of the hydrogen production cell, the power P2 is extracted from the total power P0 converged on the common direct current bus to supply power to the hydrogen production cell, and the rest power is used for charging an energy storage battery and/or supplying power to hydrogen production alternating current power equipment.
9. The photovoltaic off-grid hydrogen generation station of claim 1, wherein the photovoltaic off-grid power generation is a one-way photovoltaic array output; or the photovoltaic off-grid power generation is one-way output formed by converging multi-way photovoltaic array output through a combiner box.
10. A power supply control method of a photovoltaic off-grid hydrogen generation station is applied to a central controller in the photovoltaic off-grid hydrogen generation station as claimed in any one of claims 4 to 7, and comprises the following steps:
carrying out MPPT control on the photovoltaic cell panel, and detecting total power P0 converged on the common direct current bus;
comparing the total power P0 converged on the common direct current bus with the starting power P1 of the hydrogen production tank and the rated power P2 of the hydrogen production tank;
when the total power P0 on the common direct current bus is less than the starting power P1 of the hydrogen production cell, the total power P0 converged on the common direct current bus is completely used for charging the energy storage battery and/or supplying power to hydrogen production alternating current electric equipment;
when the rated power P2 of the hydrogen production cell is more than or equal to the total power P0 converged on the common direct current bus is more than or equal to the starting power P1 of the hydrogen production cell, the total power P0 on the common direct current bus is used for supplying power to the hydrogen production cell, and the energy of the energy storage battery is used for supplying power to the hydrogen production alternating current power equipment;
when the total power P0 converged on the common direct current bus is greater than the rated power P2 of the hydrogen production cell, the power P2 is extracted from the total power P0 converged on the common direct current bus to supply power to the hydrogen production cell, and the rest power is used for charging an energy storage battery and/or supplying power to hydrogen production alternating current power equipment.
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| CN113162022B (en) * | 2021-02-26 | 2023-06-06 | 河北建投新能源有限公司 | Power configuration method and device for photovoltaic hydrogen production station |
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