Control method and device for off-grid assembled photo-hydrogen storage roof building module

Abstract

The application provides a kind of off-grid assembled light hydrogen storage roof building module control method and device, method includes: judging whether the real-time power generation of photovoltaic power generation system meets first power storage condition;If the real-time power generation of photovoltaic power generation system meets first power storage condition, then judge whether the storable electric quantity of battery energy storage system meets second power storage condition;If the storable electric quantity of battery energy storage system does not meet second power storage condition and the storable quantity of hydrogen storage system meets hydrogen storage condition, then excess power is input into electrolytic water hydrogen production system;If the real-time power generation of photovoltaic power generation system does not meet first power storage condition, then judge whether battery energy storage system has residual power, obtain residual power judgment result;If residual power judgment result is no, then start hydrogen production system to hydrogen fuel cell cogeneration system to supply hydrogen.The application can reduce the occupation of land resources, and can also break through single energy storage bottleneck, realize light hydrogen storage synergistic effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage, in particular to a control method and device of an off-grid assembled light-hydrogen storage roof building module. BACKGROUND

[0002] With the acceleration of low-carbon demand, off-grid building energy systems are increasingly important in remote areas, islands and land resource scarce scenarios. Traditional off-grid building energy systems rely on a single mode of "photovoltaic + battery energy storage", which has the following limitations:

[0003] 1. Insufficient energy storage capacity and reliability: battery energy storage is limited by cycle life and capacity decay, and is prone to power interruption in continuous rainy weather or high load scenarios, requiring backup power sources such as diesel generators, which violates the zero-carbon goal;

[0004] 2. Single energy form: photovoltaic excess electricity is only stored as electrical energy, lacking multi-energy complementary capability, and unable to fully utilize roof space resources and meet building heat and power supply demands;

[0005] 3. Low integration of hydrogen energy systems: existing hydrogen off-grid solutions often separate electrolytic hydrogen production, hydrogen storage and fuel cells, occupying a large amount of land and building space, making it difficult to adapt to small and modular building scenarios;

[0006] Therefore, the existing off-grid building energy system has the problems of insufficient reliability and large land occupation. SUMMARY

[0007] The present application provides a control method and device of an off-grid assembled light-hydrogen storage roof building module, which aims to solve the problem of insufficient reliability and large land occupation of the existing off-grid building energy system.

[0008] In a first aspect, the present application provides a control method of an off-grid assembled light-hydrogen storage roof building module, which is applied to a general control system of a roof building module, the roof building module further comprising a photovoltaic power generation system, an electrolytic water hydrogen production system, a hydrogen storage system, a battery energy storage system and a hydrogen fuel cell heat and power supply system, the general control system being in communication connection with the photovoltaic power generation system, the electrolytic water hydrogen production system, the hydrogen storage system, the battery energy storage system and the hydrogen fuel cell heat and power supply system; the method comprises:

[0009] determining whether the real-time power generation of the photovoltaic power generation system meets a preset first power storage condition;

[0010] If the real-time power generation of the photovoltaic power generation system meets the first power storage condition, determining whether the storable power of the battery energy storage system meets a preset second power storage condition;

[0011] If the storable amount of the battery energy storage system does not meet the second electricity storage condition and the storable amount of the hydrogen storage system meets the preset hydrogen storage condition, the excess electricity is input into the water electrolysis hydrogen production system to make the water electrolysis hydrogen production system produce hydrogen by electrolysis, and the generated hydrogen is stored in the hydrogen storage system;

[0012] If the real-time power generation of the photovoltaic power generation system does not meet the first electricity storage condition, it is determined whether the battery energy storage system has excess electricity, and a residual electricity determination result is obtained.

[0013] If the residual electricity determination result is no, the water electrolysis hydrogen production system is started to supply hydrogen to the hydrogen fuel cell combined heat and power system, so that the hydrogen fuel cell combined heat and power system generates electric energy and heat energy by using hydrogen.

[0014] In a second aspect, the embodiments of the present application also provide a control device of an off-grid assembled light-hydrogen storage roof building module, which is configured in a general control system of the roof building module. The roof building module further comprises a photovoltaic power generation system, a water electrolysis hydrogen production system, a hydrogen storage system, a battery energy storage system and a hydrogen fuel cell combined heat and power system. The general control system is in communication connection with the photovoltaic power generation system, the water electrolysis hydrogen production system, the hydrogen storage system, the battery energy storage system and the hydrogen fuel cell combined heat and power system. The device is applied to a control method of the off-grid assembled light-hydrogen storage roof building module, and the device comprises:

[0015] A power determination unit is configured to determine whether the real-time power generation of the photovoltaic power generation system meets a preset first electricity storage condition.

[0016] A storable electricity determination unit is configured to determine whether the storable electricity of the battery energy storage system meets a preset second electricity storage condition if the real-time power generation of the photovoltaic power generation system meets the first electricity storage condition.

[0017] An electrolysis hydrogen production unit is configured to input excess electricity into the water electrolysis hydrogen production system to make the water electrolysis hydrogen production system produce hydrogen by electrolysis and store the generated hydrogen in the hydrogen storage system if the storable electricity of the battery energy storage system does not meet the second electricity storage condition and the storable amount of the hydrogen storage system meets the preset hydrogen storage condition.

[0018] A residual electricity determination unit is configured to determine whether the battery energy storage system has excess electricity and obtain a residual electricity determination result if the real-time power generation of the photovoltaic power generation system does not meet the first electricity storage condition.

[0019] A hydrogen supply unit is configured to start the water electrolysis hydrogen production system to supply hydrogen to the hydrogen fuel cell combined heat and power system if the remaining power determination result is negative, so that the hydrogen fuel cell combined heat and power system generates electric energy and heat energy by using hydrogen.

[0020] In a third aspect, the embodiments of the present application also provide a rooftop building module of off-grid assembled photo-hydrogen storage, which comprises a photovoltaic power generation system, a water electrolysis hydrogen production system, a hydrogen storage system, a battery energy storage system, a hydrogen fuel cell combined heat and power system and the general control system as described in the second aspect above.

[0021] The general control system is in communication connection with the photovoltaic power generation system, the water electrolysis hydrogen production system, the hydrogen storage system, the battery energy storage system and the hydrogen fuel cell combined heat and power system, the photovoltaic power generation system is in electrical connection with the battery energy storage system, the water electrolysis hydrogen production system and the hydrogen fuel cell combined heat and power system, and the water electrolysis hydrogen production system, the hydrogen storage system and the hydrogen fuel cell combined heat and power system are connected in sequence.

[0022] The present invention provides a control method and device for an off-grid assembled solar hydrogen storage rooftop building module. The method is applied to the overall control system of the rooftop building module. The rooftop building module also includes a photovoltaic power generation system, a water electrolysis hydrogen production system, a hydrogen storage system, a battery energy storage system and a hydrogen fuel cell cogeneration system. The overall control system is communicatively connected with the photovoltaic power generation system, the water electrolysis hydrogen production system, the hydrogen storage system, the battery energy storage system and the hydrogen fuel cell cogeneration system. The method includes: determining whether the real-time power generation power of the photovoltaic power generation system meets a preset first power storage condition; if the real-time power generation power of the photovoltaic power generation system meets the first power storage condition, determining whether the storable power of the battery energy storage system meets the first power storage condition. whether the amount of electricity meets a preset second electricity storage condition; if the amount of electricity that can be stored in the battery energy storage system does not meet the second electricity storage condition and the amount of electricity that can be stored in the hydrogen storage system meets the preset hydrogen storage condition, the excess electricity is input into the water electrolysis hydrogen production system, so that the water electrolysis hydrogen production system performs electrolysis hydrogen production, and the generated hydrogen is stored in the hydrogen storage system; if the real-time power generation power of the photovoltaic power generation system does not meet the first electricity storage condition, it is determined whether there is surplus electricity in the battery energy storage system to obtain a remaining electricity judgment result; if the remaining electricity judgment result is no, the water electrolysis hydrogen production system is started to supply hydrogen to the hydrogen fuel cell cogeneration system, so that the hydrogen fuel cell cogeneration system uses hydrogen to generate electricity and heat energy. The present invention has the following beneficial effects: 1. The rooftop building module fully utilizes the roof area and internal space, reduces the occupation of land resources, can be flexibly assembled on the top floor of the building and operated off-grid to provide electricity for daily life, and is particularly suitable for islands and areas with expensive land resources and energy; 2. A "battery-hydrogen" two-stage energy storage system is constructed to break through the bottleneck of single energy storage and achieve synergistic efficiency of light, hydrogen and storage; 3. Through dynamic threshold switching (i.e., battery energy storage system prioritizes charging and discharging, and hydrogen energy is used for long-term backup), both short-term frequency regulation and long-term backup power needs are taken into account. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 A flow chart of a control method for an off-grid assembled solar hydrogen storage rooftop building module provided by an embodiment of the present invention;

[0025] Figure 2 A schematic block diagram of a control device for an off-grid assembled solar hydrogen storage rooftop building module provided by an embodiment of the present invention;

[0026] Figure 3 A schematic view of an off-grid assembled light hydrogen storage roof building module is provided for the embodiments of the present application.

[0027] In the drawings, various elements are labeled the same as follows:

[0028] 10, roof building module; 11, general control system; 12, photovoltaic power generation system; 13, hydrogen production system by electrolysis of water; 14, hydrogen storage system; 15, battery energy storage system; 16, hydrogen fuel cell combined heat and power system; 161, hydrogen fuel cell; 162, heat exchange module; 163, heat preservation water tank. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0030] It should be understood that when used in the specification and the appended claims, the terms “comprise” and “include” indicate the presence of described features, integers, steps, operations, elements, and / or components, but do not exclude one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0031] It should also be understood that the terms used in the present application specification are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the present application specification and the appended claims, unless otherwise clearly indicated by the context, the singular forms “a”, “an” and “the” are intended to include the plural forms.

[0032] It should be further understood that the term “and / or” used in the present application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes these combinations. The embodiments of the present application provide a control method and device for an off-grid assembled light hydrogen storage roof building module. The control method for the off-grid assembled light hydrogen storage roof building module is described in detail in the embodiments of the present application. Figure 3 , Figure 3A schematic diagram of an off-grid assembled light hydrogen storage roof building module is provided for the embodiment of the present application. The method is applied to a general control system 11 of a roof building module 10, the roof building module 10 further comprises a photovoltaic power generation system 12, a water electrolysis hydrogen production system 13, a hydrogen storage system 14, a battery energy storage system 15 and a hydrogen fuel cell combined heat and power system 16, and the general control system 11 is in communication connection with the photovoltaic power generation system 12, the water electrolysis hydrogen production system 13, the hydrogen storage system 14, the battery energy storage system 15 and the hydrogen fuel cell combined heat and power system 16.

[0033] Figure 1 A flowchart of a control method of an off-grid assembled light hydrogen storage roof building module is provided for the embodiment of the present application. As shown in Figure 1 the method comprises steps S110-S150.

[0034] S110, judging whether the real-time power generation of the photovoltaic power generation system meets the preset first power storage condition.

[0035] In the embodiment, the roof building module can be a 10x8x3.2m cube or an 8x5x2.5m triangular body, the roof building module supports "plug and play", does not require additional infrastructure, and is suitable for various building roofs, the photovoltaic power generation system is laid on the outer surface of the roof building module to receive sunlight, the photovoltaic power generation system is used to provide daily life power and charge the battery energy storage system, the battery energy storage system can be connected to the power distribution system through a direct current busbar to provide daily power consumption; wherein the total power of the photovoltaic power generation system is 15kW; judging whether the real-time power generation of the photovoltaic power generation system meets the preset first power storage condition, if the real-time power generation of the photovoltaic power generation system is greater than the house power in the first power storage condition, it is determined that the real-time power generation of the photovoltaic power generation system meets the first power storage condition; if the real-time power generation of the photovoltaic power generation system is not greater than the house power in the first power storage condition, it is determined that the real-time power generation of the photovoltaic power generation system does not meet the first power storage condition.

[0036] In an embodiment, before step S110, further comprising: when the heat preservation water tank is in use, judging whether the temperature of the heat preservation water tank meets the second heating condition; if the temperature of the heat preservation water tank meets the second heating condition, the heat preservation water tank is powered and heated by the photovoltaic power generation system.

[0037] In the embodiment, when the heat preservation water tank is in use, it is determined whether the temperature of the heat preservation water tank is less than the second temperature threshold in the second heating condition; the second temperature threshold can be set to 60°C; if the temperature of the heat preservation water tank is less than the second temperature threshold in the second heating condition, it is determined that the temperature of the heat preservation water tank meets the second heating condition; if the temperature of the heat preservation water tank is not less than the second temperature threshold in the second heating condition, it is determined that the temperature of the heat preservation water tank does not meet the second heating condition; if the temperature of the heat preservation water tank meets the second heating condition, the heat preservation water tank is powered and heated by the photovoltaic power generation system; wherein the photovoltaic power generation system uses an electric heating mode to heat the heat preservation water tank; if the temperature of the heat preservation water tank does not meet the second heating condition, it does not need to be heated.

[0038] In the embodiment, if the real-time power generation of the photovoltaic power generation system meets the first power storage condition, it is determined whether the storable power of the battery energy storage system meets a preset second power storage condition.

[0039] In the embodiment, if the real-time power generation of the photovoltaic power generation system meets the first power storage condition, it is determined whether the storable power of the battery energy storage system is greater than a first threshold in the second power storage condition, and the first threshold can be set to 0; if the storable power of the battery energy storage system is greater than the first threshold in the second power storage condition, it is determined that the storable power of the battery energy storage system meets the second power storage condition; if the storable power of the battery energy storage system is not greater than the first threshold in the second power storage condition, it is determined that the storable power of the battery energy storage system does not meet the second power storage condition.

[0040] In an embodiment, after step S120, it further includes: if the storable power of the battery energy storage system meets the second power storage condition, charging the battery energy storage system by the photovoltaic power generation system.

[0041] In the embodiment, if the storable power of the battery energy storage system meets the second power storage condition, the battery energy storage system is charged by the photovoltaic power generation system, the battery energy storage system is a lithium iron phosphate battery energy storage system, the battery energy storage system has a storage power of 40 kWh, and the battery energy storage system is used to provide daily life power in the case of being unable to collect solar energy at night or on cloudy days.

[0042] In an embodiment, after step S120, further comprising: if the storable electric quantity of the battery energy storage system does not satisfy the second electric quantity storage condition, determining whether the storable quantity of the hydrogen storage system satisfies a preset hydrogen storage condition; if the storable quantity of the hydrogen storage system does not satisfy the hydrogen storage condition, determining whether the temperature of the heat preservation water tank satisfies a first heating condition; and if the temperature of the heat preservation water tank satisfies the first heating condition, heating the heat preservation water tank by the photovoltaic power generation system.

[0043] In the embodiment, if the storable electric quantity of the battery energy storage system does not satisfy the second electric quantity storage condition, it is determined whether the storable quantity of the hydrogen storage system is greater than a second threshold value in the hydrogen storage condition; if the storable quantity of the hydrogen storage system is greater than the second threshold value in the hydrogen storage condition, it is determined that the storable quantity of the hydrogen storage system satisfies the hydrogen storage condition; if the storable quantity of the hydrogen storage system is not greater than the second threshold value in the hydrogen storage condition, it is determined that the storable quantity of the hydrogen storage system does not satisfy the hydrogen storage condition; wherein the storable quantity can be set to 0; if the storable quantity of the hydrogen storage system does not satisfy the hydrogen storage condition, it is determined whether the temperature of the heat preservation water tank is less than a first temperature threshold value in the first heating condition; wherein the first temperature threshold value can be set to 90°C; if the temperature of the heat preservation water tank is less than the first temperature threshold value in the first heating condition, it is determined that the temperature of the heat preservation water tank satisfies the first heating condition; if the temperature of the heat preservation water tank is not less than the first temperature threshold value in the first heating condition, it is determined that the temperature of the heat preservation water tank does not satisfy the first heating condition; if the temperature of the heat preservation water tank satisfies the first heating condition, the heat preservation water tank is heated by the photovoltaic power generation system; wherein the photovoltaic power generation system uses an electric heating mode to heat the heat preservation water tank; if the temperature of the heat preservation water tank does not satisfy the first heating condition, the photovoltaic power generation system needs to be treated by light abandonment / electricity abandonment.

[0044] S130, if the storable electric quantity of the battery energy storage system does not satisfy the second electric quantity storage condition and the storable quantity of the hydrogen storage system satisfies the preset hydrogen storage condition, the excess electric quantity is input into the water electrolysis hydrogen production system, so that the water electrolysis hydrogen production system produces hydrogen by electrolysis, and the generated hydrogen is stored in the hydrogen storage system.

[0045] In the embodiment, if the storable electric quantity of the battery energy storage system does not satisfy the second electric quantity storage condition and the storable quantity of the hydrogen storage system satisfies the preset hydrogen storage condition (i.e. the storable quantity of the hydrogen storage system is greater than the second threshold value in the hydrogen storage condition), the excess electric quantity is input into the water electrolysis hydrogen production system, so that the water electrolysis hydrogen production system produces hydrogen by electrolysis, and the generated hydrogen is stored in the hydrogen storage system, realizing the synergistic effect of photovoltaic hydrogen storage.

[0046] S140, if the real-time power generation of the photovoltaic power generation system does not satisfy the first power storage condition, determining whether the battery energy storage system has residual power to obtain a residual power determination result.

[0047] In the embodiment, if the real-time power generation of the photovoltaic power generation system does not satisfy the first power storage condition and the real-time power generation of the photovoltaic power generation system is less than the house power consumption, it is determined whether the battery energy storage system has residual power to obtain a residual power determination result.

[0048] In an embodiment, after step S140, further comprising: if the residual power determination result is yes, controlling the battery energy storage system to discharge for power compensation.

[0049] In the embodiment, if the residual power determination result is yes, the battery energy storage system is controlled to discharge for power compensation to ensure normal power consumption of the user.

[0050] S150, if the residual power determination result is no, starting the water electrolysis hydrogen production system to supply hydrogen to the hydrogen fuel cell combined heat and power system, so that the hydrogen fuel cell combined heat and power system generates electric energy and heat energy by using hydrogen.

[0051] In the embodiment, if the residual power determination result is no, the water electrolysis hydrogen production system is started to supply hydrogen to the hydrogen fuel cell combined heat and power system, so that the hydrogen fuel cell combined heat and power system generates electric energy and heat energy by using hydrogen, thereby realizing synergistic effect of photovoltaic-hydrogen storage.

[0052] The hydrogen fuel cell combined heat and power system comprises a hydrogen fuel cell, a heat exchange module and a heat preservation water tank; wherein the power of the hydrogen fuel cell is 8kW, and the capacity of the heat preservation water tank is 80L; the water electrolysis hydrogen production system supplies hydrogen to the hydrogen fuel cell, the hydrogen fuel cell uses hydrogen as fuel, and after electrochemical reaction with oxygen, generates electric energy to ensure normal power consumption of the user, and generates heat energy to heat water in the heat preservation water tank through the heat exchange module; wherein the hydrogen fuel cell can be connected to the power distribution system through a direct current busbar to provide daily power consumption in the case of insufficient power.

[0053] In summary, the application has the following advantages: 1. The roof building module fully utilizes the roof area and internal space, reduces the occupation of land resources, can be flexibly assembled on the uppermost layer of the building and operates off-grid to provide daily life power consumption, especially suitable for islands, areas with expensive land resources and energy; 2. The "battery-hydrogen" two-stage energy storage system is constructed to break through the single energy storage bottleneck and realize synergistic effect of photovoltaic-hydrogen storage; 3. The dynamic threshold switching (i.e. battery energy storage system preferentially charges and discharges, and hydrogen energy long-time backup) considers short-term frequency modulation and long-term standby power demand.

[0054] Figure 2 This is a schematic block diagram of a control device for an off-grid assembled solar hydrogen storage rooftop building module provided by an embodiment of the present invention. Figure 2 As shown, corresponding to the control method of the above off-grid assembled solar hydrogen storage rooftop building module, the present invention also provides a control device for an off-grid assembled solar hydrogen storage rooftop building module, the device is configured in the overall control system of the rooftop building module, the rooftop building module also includes a photovoltaic power generation system, a water electrolysis hydrogen production system, a hydrogen storage system, a battery energy storage system and a hydrogen fuel cell cogeneration system, the overall control system is in communication with the photovoltaic power generation system, the water electrolysis hydrogen production system, the hydrogen storage system, the battery energy storage system and the hydrogen fuel cell cogeneration system. Specifically, please refer to Figure 2 The control device 700 of the off-grid assembled solar hydrogen storage rooftop building module includes:

[0055] A power determination unit 701 is configured to determine whether the real-time power generation of the photovoltaic power generation system meets a preset first power storage condition;

[0056] The storable power determination unit 702 is configured to determine whether the storable power of the battery energy storage system meets a preset second power storage condition if the real-time power generation power of the photovoltaic power generation system meets the first power storage condition;

[0057] The electrolysis hydrogen production unit 703 is configured to input excess electricity into the water electrolysis hydrogen production system if the storable electricity of the battery energy storage system does not meet the second electricity storage condition and the storable amount of the hydrogen storage system meets the preset hydrogen storage condition, so that the water electrolysis hydrogen production system performs electrolysis hydrogen production, and store the generated hydrogen into the hydrogen storage system;

[0058] a remaining power determination unit 704 configured to determine whether the battery energy storage system has remaining power if the real-time power generation power of the photovoltaic power generation system does not meet the first power storage condition, and obtain a remaining power determination result;

[0059] The hydrogen supply unit 705 is used to start the water electrolysis hydrogen production system to supply hydrogen to the hydrogen fuel cell cogeneration system if the remaining power judgment result is no, so that the hydrogen fuel cell cogeneration system uses hydrogen to generate electricity and heat energy.

[0060] It should be noted that those skilled in the art can clearly understand that the specific implementation process of the control device and each unit of the above-mentioned off-grid assembled solar hydrogen storage roof building module can refer to the corresponding description in the aforementioned method embodiment. For the convenience and brevity of the description, it will not be repeated here.

[0061] The control device of the off-grid assembled photo-hydrogen storage roof building module can be realized in the form of a computer program, which can run on an electronic device, such as a tablet computer, a notebook computer, a desktop computer, etc.

[0062] Those skilled in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized in electronic hardware, computer software or a combination of both. In order to clearly illustrate the interchangeability of hardware and software, the components and steps of each example have been described in the above description in general terms. Whether the functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. A person skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0063] In several embodiments provided by the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of each unit is only a logical functional division, and actual implementation can have another division manner. For example, a plurality of units or components can be combined or integrated into another system, or some features can be omitted or not executed.

[0064] The steps in the method embodiments of the present application can be adjusted, combined and deleted in sequence according to actual needs. The units in the device embodiments of the present application can be combined, divided and deleted according to actual needs. In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit.

[0065] The integrated unit, if realized in the form of a software functional unit and sold or used as an independent product, can be stored in a storage medium. Based on this understanding, the technical solutions of the present application essentially or say the parts that make contributions to the prior art, or the whole or part of the technical solutions can be embodied in the form of a software product, which is stored in a storage medium and includes a plurality of instructions for causing an electronic device to execute all or part of the steps of the method described in each embodiment of the present application.

[0066] The present application also provides an off-grid assembled photo-hydrogen storage roof building module 10, as shown in Figure 3As shown, the roof building module 10 comprises a photovoltaic power generation system 12, a water electrolysis hydrogen production system 13, a hydrogen storage system 14, a battery energy storage system 15, a hydrogen fuel cell combined heat and power system 16 and a general control system 11; the general control system 11 is in communication connection with the photovoltaic power generation system 12, the water electrolysis hydrogen production system 13, the hydrogen storage system 14, the battery energy storage system 15 and the hydrogen fuel cell combined heat and power system 16, the photovoltaic power generation system 12 is in electrical connection with the battery energy storage system 15, the water electrolysis hydrogen production system 13 and the hydrogen fuel cell combined heat and power system 16, and the water electrolysis hydrogen production system 13, the hydrogen storage system 14 and the hydrogen fuel cell combined heat and power system 16 are connected in sequence.

[0067] In the embodiment, the total power of the photovoltaic power generation system 12 is 15 kW; the water electrolysis hydrogen production system 13 is a PEM hydrogen production system with a rated hydrogen production amount of 2 Nm 3 / h, the hydrogen produced by the water electrolysis hydrogen production system 13 has a purity of >99.99%, a dew point temperature of <-40℃ and an outlet gas pressure of 3.0 MPa; the hydrogen storage system 14 is a titanium-based solid-state hydrogen storage bottle group with a maximum hydrogen storage amount of 10 kg, and the hydrogen produced by the water electrolysis hydrogen production system 13 can be directly stored in the hydrogen storage system 14 without the need for pressurization; the battery energy storage system 15 is a lithium iron phosphate battery energy storage system, and the battery energy storage system has a storage capacity of 40 kWh.

[0068] The overall control system 11 judges whether the real-time power generation of the photovoltaic power generation system 12 meets the preset first power storage condition; if the real-time power generation of the photovoltaic power generation system 12 meets the first power storage condition, the overall control system 11 judges whether the storable power of the battery energy storage system 15 meets the preset second power storage condition; if the storable power of the battery energy storage system 15 does not meet the second power storage condition, the overall control system 11 controls the photovoltaic power generation system 12 to input the excess power into the water electrolysis hydrogen production system 13, so that the water electrolysis hydrogen production system 13 produces hydrogen by electrolysis, and the generated hydrogen is stored in the hydrogen storage system 14; if the real-time power generation of the photovoltaic power generation system 12 does not meet the first power storage condition, the overall control system 11 judges whether the battery energy storage system 15 has excess power, and obtains a residual power judgment result; if the residual power judgment result is no, the water electrolysis hydrogen production system 13 is started to supply hydrogen to the hydrogen fuel cell combined heat and power system 16, so that the hydrogen fuel cell combined heat and power system 16 generates electric energy and heat energy by using hydrogen.

[0069] In an embodiment, as shown in Figure 3 The hydrogen fuel cell combined heat and power system 16 includes a hydrogen fuel cell 161, a heat exchange module 162 and a heat preservation water tank 163, the hydrogen fuel cell 161 transmits heat to the water in the heat preservation water tank 163 through the heat exchange module 162; the photovoltaic power generation system 12 is electrically connected with the heat preservation water tank 163.

[0070] In this embodiment, if the real-time power generation of the photovoltaic power generation system 12 is less than the house power consumption and the battery energy storage system 15 has no excess power, the water electrolysis hydrogen production system 13 is started to supply hydrogen to the hydrogen fuel cell 161, the hydrogen fuel cell 161 uses hydrogen as fuel, and generates electric energy by electrochemical reaction with oxygen to ensure normal power consumption of users, and generates heat energy to heat the water in the heat preservation water tank 163 through the heat exchange module 162; wherein the hydrogen fuel cell 161 can be connected with the power distribution system through a direct current busbar to provide daily power consumption in the case of insufficient power.

[0071] In an embodiment, as shown in Figure 3As shown, the roof style of the roof building module 10 is a triangular or cubic.

[0072] In this embodiment, the roof style of the roof building module 10 is a triangular or cubic, which can be flexibly assembled on the uppermost layer of a building and then operate off-grid; preferably, the roof building module can be customized according to the local housing and processed, and is a prefabricated steel structure building module.

[0073] In one embodiment, as shown, Figure 3 The photovoltaic power generation system 12 is laid on the outer surface of the roof building module 10.

[0074] In this embodiment, the photovoltaic power generation system 12 is laid on the outer surface of the roof building module 10 and receives sunlight, and the photovoltaic power generation system is used to provide daily life power and charge the battery energy storage system.

[0075] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A control method of an off-grid assembled photo-hydrogen storage roof building module, characterized in that, The method is applied to the overall control system of a roof building module, the roof building module further comprises a photovoltaic power generation system, a water electrolysis hydrogen production system, a hydrogen storage system, a battery energy storage system and a hydrogen fuel cell combined heat and power system, the overall control system is in communication connection with the photovoltaic power generation system, the water electrolysis hydrogen production system, the hydrogen storage system, the battery energy storage system and the hydrogen fuel cell combined heat and power system; the roof building module is a cube or a triangular body, the total power of the photovoltaic power generation system is 15 kW; the water electrolysis hydrogen production system is a PEM hydrogen production system with a rated hydrogen production amount of 2 Nm 3 / h, the water electrolysis hydrogen production system outputs hydrogen with a purity of >99.99%, a dew point temperature of <-40 DEG C and an outlet gas pressure of 3.0 MPa; the hydrogen storage system is a titanium-based solid-state hydrogen storage bottle group with a maximum hydrogen storage capacity of 10 kg, the hydrogen produced by the water electrolysis hydrogen production system can be directly stored in the hydrogen storage system without pressurization; the battery energy storage system is a lithium iron phosphate battery energy storage system, the battery energy storage system has a power storage capacity of 40 kWh, and the method comprises: determining whether the real-time power generation of the photovoltaic power generation system meets a preset first power storage condition; if the real-time power generation of the photovoltaic power generation system meets the first power storage condition, determining whether the storable power of the battery energy storage system meets a preset second power storage condition; if the storable power of the battery energy storage system does not meet the second power storage condition and the storable amount of the hydrogen storage system meets a preset hydrogen storage condition, inputting excess power into the water electrolysis hydrogen production system to make the water electrolysis hydrogen production system produce hydrogen by electrolysis and store the produced hydrogen in the hydrogen storage system; if the real-time power generation of the photovoltaic power generation system does not meet the first power storage condition, determining whether the battery energy storage system has residual power to obtain a residual power determination result; if the residual power determination result is no, starting the water electrolysis hydrogen production system to supply hydrogen to the hydrogen fuel cell combined heat and power system to make the hydrogen fuel cell combined heat and power system produce electric energy and heat energy by using hydrogen; the hydrogen fuel cell combined heat and power system comprises a hydrogen fuel cell, a heat exchange module and a heat preservation water tank; the power of the hydrogen fuel cell is 8 kW and the capacity of the heat preservation water tank is 80 L; the water electrolysis hydrogen production system supplies hydrogen to the hydrogen fuel cell, the hydrogen fuel cell uses hydrogen as fuel to produce electric energy by electrochemical reaction with oxygen to ensure normal power consumption of users and produces heat energy to heat water in the heat preservation water tank through the heat exchange module; the hydrogen fuel cell is connected with a power distribution system through a direct current busbar to provide daily power consumption in the case of insufficient power; after the determination of whether the storable power of the battery energy storage system meets the preset second power storage condition, the method further comprises: if the storable power of the battery energy storage system does not meet the second power storage condition, determining whether the storable amount of the hydrogen storage system meets a preset hydrogen storage condition; if the storable amount of the hydrogen storage system does not meet the hydrogen storage condition, determining whether the temperature of the heat preservation water tank meets a first heating condition; if the temperature of the heat preservation water tank meets the first heating condition, heating the heat preservation water tank by the photovoltaic power generation system; before the determination of whether the real-time power generation of the photovoltaic power generation system meets the preset first power storage condition, the method further comprises: when the heat preservation water tank is in use, determining whether the temperature of the heat preservation water tank meets a second heating condition; if the temperature of the heat preservation water tank meets the second heating condition, heating the heat preservation water tank by the photovoltaic power generation system.

2. The control method of the off-grid fabricated photohydrologetic roof building module according to claim 1, characterized in that, after the determination of whether the storable power of the battery energy storage system meets the preset second power storage condition, the method further comprises: if the storable power of the battery energy storage system meets the second power storage condition, charging the battery energy storage system by the photovoltaic power generation system.

3. The control method of the off-grid fabricated photo-hydrogen storage roof building module according to claim 1, wherein, after the determination of whether the battery energy storage system has residual power to obtain a residual power determination result, the method further comprises: if the residual power determination result is yes, controlling the battery energy storage system to discharge to supplement power.

4. A control device for an off-grid, prefabricated, photo-hydro storage roof building module, characterized in that, The device is configured in the overall control system of the roof building module, the roof building module further comprises a photovoltaic power generation system, a water electrolysis hydrogen production system, a hydrogen storage system, a battery energy storage system and a hydrogen fuel cell combined heat and power system, the overall control system is in communication connection with the photovoltaic power generation system, the water electrolysis hydrogen production system, the hydrogen storage system, the battery energy storage system and the hydrogen fuel cell combined heat and power system; the roof building module is a cube or a triangular body, the total power of the photovoltaic power generation system is 15 kW; the water electrolysis hydrogen production system is a PEM hydrogen production system with a rated hydrogen production amount of 2 Nm 3 / h, the water electrolysis hydrogen production system outputs hydrogen with a purity of >99.99%, a dew point temperature of <-40 DEG C and an outlet gas pressure of 3.0 MPa; the hydrogen storage system is a titanium-based solid-state hydrogen storage bottle group with a maximum hydrogen storage capacity of 10 kg, the hydrogen produced by the water electrolysis hydrogen production system can be directly stored in the hydrogen storage system without pressurization; the battery energy storage system is a lithium iron phosphate battery energy storage system, the battery energy storage system has a storage capacity of 40 kWh, the device is applied to the control method of the off-grid assembled light hydrogen storage roof building module as claimed in any one of claims 1-3, and the device comprises: a power judging unit configured to judge whether real-time power generation of the photovoltaic power generation system meets a preset first electricity storage condition; a storable electricity judging unit configured to, if the real-time power generation of the photovoltaic power generation system meets the first electricity storage condition, judge whether storable electricity of the battery energy storage system meets a preset second electricity storage condition; an electrolytic hydrogen production unit configured to, if the storable electricity of the battery energy storage system does not meet the second electricity storage condition and the storable amount of the hydrogen storage system meets a preset hydrogen storage condition, input excess electricity into the electrolytic water hydrogen production system, so that the electrolytic water hydrogen production system produces hydrogen by electrolysis, and the produced hydrogen is stored in the hydrogen storage system; a residual electricity judging unit configured to, if the real-time power generation of the photovoltaic power generation system does not meet the first electricity storage condition, judge whether the battery energy storage system has residual electricity, to obtain a residual electricity judging result; a hydrogen supply unit configured to, if the residual electricity judging result is no, start the electrolytic water hydrogen production system to supply hydrogen to the hydrogen fuel cell combined heat and power system, so that the hydrogen fuel cell combined heat and power system generates electric energy and heat energy by using hydrogen; the hydrogen fuel cell combined heat and power system comprises a hydrogen fuel cell, a heat exchange module and a heat preservation water tank; the power of the hydrogen fuel cell is 8 kW, and the capacity of the heat preservation water tank is 80 L; the electrolytic water hydrogen production system supplies hydrogen to the hydrogen fuel cell, the hydrogen fuel cell uses hydrogen as fuel, and generates electric energy by electrochemical reaction with oxygen to ensure normal electricity use of users, and generates heat energy to heat water in the heat preservation water tank through the heat exchange module; the hydrogen fuel cell is connected to a power distribution system through a direct current busbar to provide daily electricity use in the case of insufficient electricity; the storable electricity judging unit is further configured to, if the storable electricity of the battery energy storage system does not meet the second electricity storage condition, judge whether the storable amount of the hydrogen storage system meets a preset hydrogen storage condition; if the storable amount of the hydrogen storage system does not meet the hydrogen storage condition, judge whether the temperature of the heat preservation water tank meets a first heating condition; if the temperature of the heat preservation water tank meets the first heating condition, the heat preservation water tank is heated by power supply of the photovoltaic power generation system; the power judging unit is further configured to, when the heat preservation water tank is in a use state, judge whether the temperature of the heat preservation water tank meets a second heating condition; if the temperature of the heat preservation water tank meets the second heating condition, the heat preservation water tank is heated by power supply of the photovoltaic power generation system.

5. An off-grid, fabricated, photo-hydrogen storage, roof building module, characterized in that, the roof building module comprises a photovoltaic power generation system, an electrolytic water hydrogen production system, a hydrogen storage system, a battery energy storage system, a hydrogen fuel cell combined heat and power system and the control device of the off-grid assembled photovoltaic-hydrogen storage roof building module according to claim 4. The total control system is in communication connection with the photovoltaic power generation system, the water electrolysis hydrogen production system, the hydrogen storage system, the battery energy storage system and the hydrogen fuel cell combined heat and power system, the photovoltaic power generation system is in electrical connection with the battery energy storage system, the water electrolysis hydrogen production system and the hydrogen fuel cell combined heat and power system, and the water electrolysis hydrogen production system, the hydrogen storage system and the hydrogen fuel cell combined heat and power system are sequentially connected.

6. The off-grid, fabricated, photo-hydrogen storage, rooftop building module of claim 5, wherein, The hydrogen fuel cell combined heat and power system comprises a hydrogen fuel cell, a heat exchange module and a heat preservation water tank, and the hydrogen fuel cell transmits heat to water in the heat preservation water tank through the heat exchange module. The photovoltaic power generation system is in electrical connection with the heat preservation water tank.

7. The off-grid, fabricated, photo-hydrogen storage, rooftop building module of claim 5, wherein, The photovoltaic power generation system is laid on the outer surface of the roof building module.

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