Renewable energy source micro-grid system based on electricity-hydrogen coupling cooperation

Abstract

The utility model discloses a renewable energy source micro-grid system based on electricity-hydrogen coupling cooperation. Comprising a wind power generation system, a photovoltaic power generation system, a hydrogen fuel cell power generation system, an electric hydrogen production device, a charging and battery replacing station, an external oxygen utilization system, an electric power collection bus, a power supply line, an electric power connection line, an electric power sending-out line, a hydrogen fuel cell hydrogen storage device, a hydrogen fuel cell oxygen storage device, a hydrogen storage pipeline, an oxygen storage pipeline, a hydrogen supply pipeline, an oxygen supply pipeline and a hydrogen conveying pipeline. The system comprises an external oxygen conveying pipeline, a power monitoring module, a hydrogen consumption monitoring module, an oxygen consumption monitoring module and a master control module. According to the utility model, the monitoring strategies of the power monitoring module, the hydrogen consumption monitoring module and the master control module are utilized to form a renewable energy source combined power generation, power utilization, hydrogen production and hydrogen consumption micro-grid mode consisting of a wind power generation system, a photovoltaic power generation system, a hydrogen fuel cell power generation system, a charging station and a hydrogen refueling station, so that power-hydrogen coupling complementation is realized; and the clean level of electro-hydrogen application is improved.

Description

Technical Field

[0001] This utility model belongs to the field of renewable energy and hydrogen energy, and in particular relates to a renewable energy microgrid system based on electro-hydrogen coupling synergy. Background Technology

[0002] Hydrogen energy is considered the most promising clean energy source in the 21st century. It is a clean and efficient secondary energy source that is being developed and utilized at an accelerated pace. It has the characteristics of high calorific value, high mass energy density, and low volumetric energy density. It can meet the peak shaving demand for a long period of time and can realize the bidirectional circulation and exchange of hydrogen energy and electrical energy.

[0003] Charging and battery swapping stations can serve as unconventional energy storage devices. Through unified scheduling and control by the microgrid's central control module, they can achieve power complementarity within the microgrid system, cooperate with the microgrid system to complete peak shaving and valley filling, and improve the operating efficiency of the microgrid system.

[0004] Currently, strengthening the construction of microgrids is of great significance in advancing the achievement of dual-carbon goals. Utilizing hydrogen energy storage and charging / swapping stations to achieve bidirectional electricity-hydrogen conversion can effectively integrate wind and photovoltaic resources, realizing a coupled and synergistic cycle of electricity and hydrogen, which has advantages such as high efficiency, zero carbon emissions, and renewability.

[0005] Therefore, in order to promote the efficient and sustainable development of renewable energy, improve the utilization efficiency of renewable energy, realize the bidirectional coupling and synergistic development of electricity and hydrogen energy, and give full play to the resource conversion and storage advantages of hydrogen energy under the development of new power systems, it is essential to propose a renewable energy microgrid system based on the coupling and synergy of electricity and hydrogen. Summary of the Invention

[0006] The purpose of this utility model is to disclose a renewable energy microgrid system based on the coupling and synergy of electricity and hydrogen in the microgrid system, which can realize the coupling and synergy of renewable energy power generation and consumption with hydrogen production and consumption, promote the bidirectional synergistic development of electricity and hydrogen cycle, and improve the greening level and operating efficiency of microgrid.

[0007] To achieve the aforementioned objectives, this utility model provides a renewable energy microgrid system based on electro-hydrogen coupling and synergy. Its features include: a wind power generation system, a photovoltaic power generation system, a hydrogen fuel cell power generation system, an electro-hydrogen production device, a charging / swapping station, and a power collection bus. The wind power generation system is connected to the power collection bus via a wind power supply line. A wind power monitoring module is installed on the wind power supply line to obtain the wind power supply power P. W The photovoltaic power generation system is connected to the power collection bus via photovoltaic power supply lines. A photovoltaic power monitoring module is installed on the photovoltaic power supply lines to obtain the photovoltaic power supply P. PThe hydrogen fuel cell power generation system is connected to the power collection bus via a hydrogen fuel cell power supply line. The hydrogen fuel cell power supply line is equipped with a hydrogen fuel cell power monitoring module to obtain the power output P of the hydrogen fuel cell unit. H The electro-hydrogen production equipment is connected to the power collection bus via a power transmission line. The power transmission line is equipped with an electro-hydrogen production power monitoring module to obtain the power consumption P of the electro-hydrogen production system. E The charging and battery swapping station is connected to the power collection bus via a power tie line. A power monitoring module for the charging and battery swapping station is installed on this power tie line to obtain the charging power P of the station. C and the discharge power P of the charging and battery swapping station L .

[0008] The electro-hydrogen generator connects to a hydrogen refueling station via a hydrogen pipeline. The pipeline is equipped with a first hydrogen consumption monitoring module to obtain the standard volume V2 of the pipeline. The rated standard volume of the hydrogen storage equipment at the refueling station is V1. The electro-hydrogen generator also connects to an external oxygen supply system via an external oxygen supply pipeline, which is equipped with a first oxygen consumption monitoring module. Furthermore, the electro-hydrogen generator connects to a hydrogen fuel cell storage device via a hydrogen storage pipeline, which is equipped with a second hydrogen consumption monitoring module to obtain the standard volume V4 of the hydrogen fuel cell storage device. The standard hydrogen production volume of the electro-hydrogen generator is V1. H The electric hydrogen generator is connected to the hydrogen fuel cell oxygen storage device via an oxygen storage pipeline. A second oxygen monitoring module is installed on the oxygen storage pipeline to obtain the standard volume V6 of the hydrogen fuel cell oxygen storage device. The standard oxygen production volume of the electric hydrogen generator is V. O The hydrogen fuel cell hydrogen storage device is connected to the hydrogen fuel cell power generation system via a hydrogen supply pipeline. A third hydrogen consumption monitoring module is installed on the hydrogen supply pipeline. The rated standard volume of the hydrogen fuel cell hydrogen storage device is V3. The hydrogen fuel cell oxygen storage device is connected to the hydrogen fuel cell power generation system via an oxygen supply pipeline. A third oxygen consumption monitoring module is installed on the oxygen supply pipeline. The rated standard volume of the hydrogen fuel cell oxygen storage device is V5.

[0009] The system includes a wind power monitoring module, a photovoltaic power monitoring module, a hydrogen fuel cell power monitoring module, a charging / swapping station power monitoring module, an electro-hydrogen production power monitoring module, a primary hydrogen consumption monitoring module, a secondary hydrogen consumption monitoring module, a tertiary hydrogen consumption monitoring module, a primary oxygen consumption monitoring module, a secondary oxygen consumption monitoring module, a tertiary oxygen consumption monitoring module, and an electro-hydrogen production equipment connected to a central control module. The central control module is used to determine the electrical power P of the electro-hydrogen production system reported by the electro-hydrogen production equipment to the central control module. E With wind power supply P W Photovoltaic power supply P P Hydrogen fuel cell power supply P H Charging power P of charging and battery swapping stations C and the discharge power P of the charging and battery swapping station LThe logical relationship and the standard hydrogen production volume V reported by the electric hydrogen generator to the central control module. H The logical relationship between the hydrogen storage equipment at the hydrogen refueling station (rated standard volume V1), the hydrogen pipeline (standard volume V2), the hydrogen fuel cell storage equipment (rated standard volume V3), and the hydrogen fuel cell storage equipment (standard volume V4), and the oxygen production standard volume V reported by the electro-hydrogen production equipment to the central control module. O Establish the logical relationship between the rated standard volume V5 and the standard volume V6 of the hydrogen fuel cell oxygen storage device, and send instructions.

[0010] The central control module is used to determine logical relationships and send instructions, specifically as follows:

[0011] 1) System initial startup phase:

[0012] The main control module sends a command to the electro-hydrogen production equipment to start the equipment, and simultaneously sends a command to the electro-hydrogen production power monitoring module to activate the power transmission line and supply the power collected by the power collection bus to the electro-hydrogen production equipment.

[0013] When P W +P P ≤P E The main control module instructs the first hydrogen consumption monitoring module to open the hydrogen supply pipeline, supplying hydrogen to the hydrogen refueling station. Simultaneously, it instructs the first oxygen consumption monitoring module to open the external oxygen supply pipeline, supplying oxygen to the external oxygen system. When V2 > V1, the main control module instructs the first hydrogen consumption monitoring module to close the hydrogen supply pipeline, stopping the supply of hydrogen to the hydrogen refueling station equipment. It also instructs the first oxygen consumption monitoring module to close the external oxygen supply pipeline. Simultaneously, it instructs the second hydrogen consumption monitoring module and the second oxygen consumption monitoring module to open the hydrogen storage pipeline and the oxygen storage pipeline, supplying hydrogen and oxygen to the hydrogen fuel cell hydrogen storage equipment and the hydrogen fuel cell oxygen storage equipment, respectively. When V4 > V3, the main control module sends a command to the second oxygen monitoring module to close the hydrogen storage pipeline and stop supplying hydrogen to the hydrogen fuel cell storage equipment; when V6 > V5, the main control module sends a command to the second oxygen monitoring module to close the oxygen storage pipeline and stop supplying oxygen to the hydrogen fuel cell storage equipment; the main control module simultaneously sends information to the electro-hydrogen production power monitoring module, the power transmission line is taken out of operation, the power collection bus no longer supplies power to the electro-hydrogen production equipment, and the main control module sends information to the charging and battery swapping station power monitoring module, the power connection line is put into operation, and the power collected by the power collection bus is supplied to the charging and battery swapping station; when P W +P P >P C At this time, the main control module transmits information to the wind power monitoring module and the photovoltaic power monitoring module to reduce the output until P... W +P P ≤P C ;

[0014] 2) After supplying power to the charging and battery swapping station:

[0015] When P E <P W +P P ≤P E +P C At the same time, the power collected by the power collection bus simultaneously supplies power to the hydrogen production equipment and the charging and battery swapping station;

[0016] When P W +P P >P E +P C At the same time, the power collected by the power collection bus simultaneously supplies power to the hydrogen production equipment and the charging and battery swapping station. The main control module transmits information to the wind power monitoring module and the photovoltaic power monitoring module to reduce the output until P... W +P P ≤P E +P C ;

[0017] 3) When both the hydrogen storage device and the oxygen storage device of the hydrogen fuel cell are saturated, and the electrogenerated hydrogen device stops supplying hydrogen and oxygen to the hydrogen fuel cell:

[0018] When P C <P W +P P ≤P E +P C At this time, the power collection bus supplies power to the charging and battery swapping station and the electric hydrogen production equipment. The electric hydrogen production equipment delivers hydrogen to the hydrogen refueling station via the hydrogen transmission pipeline and oxygen to the external oxygen supply system via the external oxygen transmission pipeline. When V2 > V1, the main control module sends a command to the first hydrogen consumption monitoring module to close the hydrogen transmission pipeline and stop supplying hydrogen to the hydrogen refueling station equipment. It also sends a command to the first oxygen consumption monitoring module to close the external oxygen supply pipeline. Simultaneously, it transmits information to the wind power monitoring module and the photovoltaic power monitoring module to reduce the output until P... W +P P =P C ;

[0019] When P E ≤P W +P P ≤P E +P CAt this time, the power collection bus supplies power to the charging and battery swapping station and the electric hydrogen production equipment. The electric hydrogen production equipment delivers hydrogen to the hydrogen refueling station via the hydrogen transmission pipeline and oxygen to the external oxygen supply system via the external oxygen transmission pipeline. When V2 > V1, the main control module sends a command to the first hydrogen consumption monitoring module to close the hydrogen transmission pipeline and stop supplying hydrogen to the hydrogen refueling station equipment. It also sends a command to the first oxygen consumption monitoring module to close the external oxygen supply pipeline. Simultaneously, it sends commands to the third hydrogen consumption monitoring module and the third oxygen consumption monitoring module to open the hydrogen supply pipeline and the oxygen supply pipeline, supplying hydrogen and oxygen to the hydrogen fuel cell power generation system, starting the hydrogen fuel cell power generation system, and adjusting P3 of the hydrogen fuel cell power generation system to ensure P W +P P +P H =P C ;

[0020] When P W +P P <P E When the charging and battery swapping station has sufficient power, the main control module sends a command to the power monitoring module of the charging and battery swapping station, causing the station to switch from charging to discharging. The discharged power from the charging and battery swapping station is collected through the power connection line to the power collection bus. The power collection bus collects power from the wind power generation system, the photovoltaic power generation system, and the charging and battery swapping station, and then sends it to the hydrogen production system, ensuring P W +P P +P L ≤P E This will meet the electricity needs of hydrogen refueling stations.

[0021] Furthermore, the wind power generation system includes a wind turbine and a step-up unit connected in sequence; the photovoltaic power generation system includes a photovoltaic matrix and a step-up unit connected in sequence; the hydrogen fuel cell power generation system includes a hydrogen fuel cell stack and a step-up unit connected in sequence; the step-up unit includes a low-voltage busbar of a step-up transformer, a step-up transformer, and a high-voltage busbar of a step-up transformer connected in sequence.

[0022] Advantages of this utility model:

[0023] (1) By establishing a renewable energy microgrid system based on the synergy of electricity and hydrogen coupling, the internal coupling and complementarity of wind and solar renewable energy power generation, electricity consumption and hydrogen production and consumption can be realized, thereby improving the cleanliness of electricity and hydrogen applications;

[0024] (2) By monitoring the discharge power of wind power generation system, photovoltaic power generation system, hydrogen fuel cell power generation system and charging and swapping station, the electricity generated by renewable energy is used for hydrogen production, and the combination of various power sources is reasonably adjusted and optimized to achieve zero-emission clean green electricity hydrogen production in the whole process;

[0025] (3) Hydrogen is supplied to the hydrogen fuel cell unit by the hydrogen supply pipeline, hydrogen storage pipeline and hydrogen transportation pipeline, and hydrogen is supplied to the hydrogen refueling station by the hydrogen power generation equipment and the hydrogen fuel cell storage equipment, thereby improving the greenness of hydrogen use in the microgrid.

[0026] (4) By implementing a joint monitoring strategy for power supply lines, power connection lines, power transmission lines, electric hydrogen production equipment, hydrogen fuel cell storage equipment, hydrogen refueling stations, charging and swapping stations, hydrogen supply pipelines, hydrogen storage pipelines, and hydrogen transportation pipelines through the main control module, power monitoring modules and hydrogen consumption monitoring modules, the comprehensive utilization level of renewable energy can be improved, and the synergistic utilization of electric and hydrogen coupling can be realized. Attached Figure Description

[0027] Figure 1 This invention relates to a renewable energy microgrid system based on electro-hydrogen coupling and synergy. Detailed Implementation

[0028] To better understand the purpose, structure, and function of this utility model, the following detailed description of a renewable energy microgrid system based on electro-hydrogen coupling and synergy is provided in conjunction with the accompanying drawings.

[0029] Reference Figure 1 A renewable energy microgrid system based on electro-hydrogen coupling and synergy includes: a wind power generation system, a photovoltaic power generation system, a hydrogen fuel cell power generation system, an electro-hydrogen production device, a charging and battery swapping station, and a power collection bus. The wind power generation system is connected to the power collection bus via wind power supply lines. Wind power supply lines are equipped with wind power monitoring modules to obtain the wind power supply power P. W The photovoltaic power generation system is connected to the power collection bus via photovoltaic power supply lines. A photovoltaic power monitoring module is installed on the photovoltaic power supply lines to obtain the photovoltaic power supply P. P The hydrogen fuel cell power generation system is connected to the power collection bus via a hydrogen fuel cell power supply line. A hydrogen fuel cell power monitoring module is installed on the power supply line to obtain the power output P of the hydrogen fuel cell unit. H The electro-hydrogen production equipment is connected to the power collection bus via a power transmission line. The power transmission line is equipped with an electro-hydrogen production power monitoring module to obtain the power consumption P of the electro-hydrogen production system. E The charging and battery swapping station is connected to the power collection bus via a power interconnection line. A power monitoring module for the charging and battery swapping station is installed on this power interconnection line to obtain the charging power P of the station. C and the discharge power P of the charging and battery swapping station L .

[0030] The wind power generation system sends electricity to the power collection bus via wind power supply lines, the photovoltaic power generation system sends electricity to the power collection bus via photovoltaic power supply lines, the hydrogen fuel cell power generation system sends electricity to the power collection bus via hydrogen fuel cell power supply lines, the power collection bus sends electricity to the hydrogen production equipment via power transmission lines, and the power collection bus exchanges power with the charging and battery swapping station via power interconnection lines.

[0031] The electric hydrogen production equipment is connected to the hydrogen refueling station through a hydrogen transmission pipeline. The hydrogen transmission pipeline is equipped with a first hydrogen consumption monitoring module to obtain the standard volume V2 of the hydrogen transmission pipeline. The rated standard volume of the hydrogen storage equipment at the hydrogen refueling station is V1.

[0032] The electric hydrogen production equipment is connected to an external oxygen supply system via an external oxygen supply pipeline, and the external oxygen supply pipeline is equipped with a first oxygen supply monitoring module.

[0033] The electro-hydrogen generator is connected to the hydrogen fuel cell storage device via a hydrogen storage pipeline. A second hydrogen consumption monitoring module is installed on the storage pipeline to obtain the standard volume V4 of the hydrogen fuel cell storage device. The standard volume of hydrogen produced by the electro-hydrogen generator is V. H .

[0034] The electric hydrogen generator is connected to the hydrogen fuel cell oxygen storage device via an oxygen storage pipeline. A second oxygen monitoring module is installed on the oxygen storage pipeline to obtain the standard volume V6 of the hydrogen fuel cell oxygen storage device. The standard oxygen production volume of the electric hydrogen generator is V. O .

[0035] The hydrogen fuel cell storage device is connected to the hydrogen fuel cell power generation system through a hydrogen supply pipeline. A third hydrogen consumption monitoring module is installed on the hydrogen supply pipeline. The rated standard volume of the hydrogen fuel cell storage device is V3.

[0036] The oxygen storage device for hydrogen fuel cells is connected to the hydrogen fuel cell power generation system through an oxygen supply pipeline. A third oxygen monitoring module is installed on the oxygen supply pipeline. The rated standard volume of the oxygen storage device for hydrogen fuel cells is V5.

[0037] Wind power monitoring module, photovoltaic power monitoring module, hydrogen fuel cell power monitoring module, charging and swapping station power monitoring module, electric hydrogen production power monitoring module, first hydrogen consumption monitoring module, second hydrogen consumption monitoring module, third hydrogen consumption monitoring module, first oxygen consumption monitoring module, second oxygen consumption monitoring module, third oxygen consumption monitoring module and electric hydrogen production equipment connection master control module.

[0038] The central control module comprehensively manages and monitors the wind power monitoring module, photovoltaic power monitoring module, hydrogen fuel cell power monitoring module, charging and swapping station power monitoring module, and electric hydrogen production power monitoring module to realize the power exchange power monitoring strategy and provide support for the hydrogen storage and transportation status monitoring module.

[0039] The central control module implements a monitoring strategy for hydrogen storage, transportation, and application by comprehensively managing and monitoring the first hydrogen consumption monitoring module, the second hydrogen consumption monitoring module, the third hydrogen consumption monitoring module, the first oxygen consumption monitoring module, the second oxygen consumption monitoring module, and the third oxygen consumption monitoring module.

[0040] The central control module manages and monitors the electro-hydrogen production equipment comprehensively, enabling the implementation of start-up and shutdown monitoring strategies for the equipment.

[0041] A wind power generation system consists of a wind turbine and a step-up unit connected in sequence.

[0042] A photovoltaic power generation system consists of a photovoltaic matrix and a boost unit connected in sequence.

[0043] The hydrogen fuel cell power generation system includes a hydrogen fuel cell stack and a booster unit connected in sequence.

[0044] The step-up unit includes a step-up transformer low-voltage busbar, a step-up transformer, and a step-up transformer high-voltage busbar connected in sequence.

[0045] In this embodiment, the power supply consists of a wind power generation system, a photovoltaic power generation system, a hydrogen fuel cell power generation system, and a charging and battery swapping station. The wind power generation system and the photovoltaic power generation system are the main power supply, while the hydrogen fuel cell power generation system and the charging and battery swapping station are auxiliary peak-shaving power supply.

[0046] In this embodiment, the hydrogen peak-shaving measures consist of an electric hydrogen production device, a hydrogen fuel cell storage device, a hydrogen supply pipeline, and a hydrogen transportation pipeline. When the main power supply capacity is insufficient, hydrogen is delivered to the hydrogen fuel cell unit using the electric hydrogen production device and the hydrogen supply pipeline to start the hydrogen fuel cell unit and meet the power demand of the charging and battery swapping station. When the main power supply capacity is surplus, the surplus hydrogen is transported to the hydrogen refueling station using the hydrogen transportation pipeline to meet the hydrogen needs of the hydrogen refueling station. If necessary, the surplus hydrogen is stored in the hydrogen fuel cell storage device using the electric hydrogen production device and the hydrogen fuel cell storage device.

[0047] The central control module is used to determine the power consumption P of the hydrogen production system reported by the electro-hydrogen production equipment to the central control module. E With wind power supply P W Photovoltaic power supply P P Hydrogen fuel cell power supply P H Charging power P of charging and battery swapping stations C and the discharge power P of the charging and battery swapping station L The logical relationship and the standard hydrogen production volume V reported by the electric hydrogen generator to the central control module. HThe logical relationship between the hydrogen storage equipment at the hydrogen refueling station (rated standard volume V1), the hydrogen pipeline (standard volume V2), the hydrogen fuel cell storage equipment (rated standard volume V3), and the hydrogen fuel cell storage equipment (standard volume V4), and the oxygen production standard volume V reported by the electro-hydrogen production equipment to the central control module. O Establish the logical relationship between the rated standard volume V5 and the standard volume V6 of the hydrogen fuel cell oxygen storage device, and send instructions:

[0048] System initial startup phase:

[0049] The main control module sends a command to the electro-hydrogen production equipment to start the equipment, and simultaneously sends a command to the electro-hydrogen production power monitoring module to activate the power transmission line and supply the power collected by the power collection bus to the electro-hydrogen production equipment.

[0050] When P W +P P ≤P E The main control module instructs the first hydrogen consumption monitoring module to open the hydrogen supply pipeline, supplying hydrogen to the hydrogen refueling station. Simultaneously, it instructs the first oxygen consumption monitoring module to open the external oxygen supply pipeline, supplying oxygen to the external oxygen system. When V2 > V1, the main control module instructs the first hydrogen consumption monitoring module to close the hydrogen supply pipeline, stopping the supply of hydrogen to the hydrogen refueling station equipment. It also instructs the first oxygen consumption monitoring module to close the external oxygen supply pipeline. Simultaneously, it instructs the second hydrogen consumption monitoring module and the second oxygen consumption monitoring module to open the hydrogen storage pipeline and the oxygen storage pipeline, supplying hydrogen and oxygen to the hydrogen fuel cell hydrogen storage equipment and the hydrogen fuel cell oxygen storage equipment, respectively. When V4 > V3, the main control module sends a command to the second oxygen monitoring module to close the hydrogen storage pipeline and stop supplying hydrogen to the hydrogen fuel cell storage equipment; when V6 > V5, the main control module sends a command to the second oxygen monitoring module to close the oxygen storage pipeline and stop supplying oxygen to the hydrogen fuel cell storage equipment; the main control module simultaneously sends information to the electro-hydrogen production power monitoring module, the power transmission line is taken out of operation, the power collection bus no longer supplies power to the electro-hydrogen production equipment, and the main control module sends information to the charging and battery swapping station power monitoring module, the power connection line is put into operation, and the power collected by the power collection bus is supplied to the charging and battery swapping station; when P W +P P >P C At this time, the main control module transmits information to the wind power monitoring module and the photovoltaic power monitoring module to reduce the output until P... W +P P ≤P C ;

[0051] After supplying power to the charging and battery swapping station:

[0052] When P E <P W +P P ≤PE +P C At the same time, the power collected by the power collection bus simultaneously supplies power to the hydrogen production equipment and the charging and battery swapping station;

[0053] When P W +P P >P E +P C At the same time, the power collected by the power collection bus simultaneously supplies power to the hydrogen production equipment and the charging and battery swapping station. The main control module transmits information to the wind power monitoring module and the photovoltaic power monitoring module to reduce the output until P... W +P P ≤P E +P C ;

[0054] When both the hydrogen storage device and the oxygen storage device of the hydrogen fuel cell are saturated, and the electrogeneration device stops supplying hydrogen and oxygen to the hydrogen fuel cell:

[0055] When P C <P W +P P ≤P E +P C At this time, the power collection bus supplies power to the charging and battery swapping station and the electric hydrogen production equipment. The electric hydrogen production equipment delivers hydrogen to the hydrogen refueling station via the hydrogen transmission pipeline and oxygen to the external oxygen supply system via the external oxygen transmission pipeline. When V2 > V1, the main control module sends a command to the first hydrogen consumption monitoring module to close the hydrogen transmission pipeline and stop supplying hydrogen to the hydrogen refueling station equipment. It also sends a command to the first oxygen consumption monitoring module to close the external oxygen supply pipeline. Simultaneously, it transmits information to the wind power monitoring module and the photovoltaic power monitoring module to reduce the output until P... W +P P =P C ;

[0056] When P E ≤P W +P P ≤P E +P C At this time, the power collection bus supplies power to the charging and battery swapping station and the electric hydrogen production equipment. The electric hydrogen production equipment delivers hydrogen to the hydrogen refueling station via the hydrogen transmission pipeline and oxygen to the external oxygen supply system via the external oxygen transmission pipeline. When V2 > V1, the main control module sends a command to the first hydrogen consumption monitoring module to close the hydrogen transmission pipeline and stop supplying hydrogen to the hydrogen refueling station equipment. It also sends a command to the first oxygen consumption monitoring module to close the external oxygen supply pipeline. Simultaneously, it sends commands to the third hydrogen consumption monitoring module and the third oxygen consumption monitoring module to open the hydrogen supply pipeline and the oxygen supply pipeline, supplying hydrogen and oxygen to the hydrogen fuel cell power generation system, starting the hydrogen fuel cell power generation system, and adjusting P3 of the hydrogen fuel cell power generation system to ensure P W +P P +P H=P C ;

[0057] When P W +P P <P E When the charging and battery swapping station has sufficient power, the main control module sends a command to the power monitoring module of the charging and battery swapping station, causing the station to switch from charging to discharging. The discharged power from the charging and battery swapping station is collected through the power connection line to the power collection bus. The power collection bus collects power from the wind power generation system, the photovoltaic power generation system, and the charging and battery swapping station, and then sends it to the hydrogen production system, ensuring P W +P P +P L ≤P E This will meet the electricity needs of hydrogen refueling stations.

[0058] The renewable energy microgrid system based on electro-hydrogen coupling synergy proposed in this utility model has the following technical effects:

[0059] By establishing a renewable energy microgrid system based on the synergistic coupling of electricity and hydrogen, the internal coupling and complementarity of various renewable energy generation, electricity consumption and hydrogen production, and hydrogen consumption can be achieved, thereby improving the cleanliness of electricity and hydrogen applications.

[0060] By monitoring the discharge power of wind power generation systems, photovoltaic power generation systems, hydrogen fuel cell power generation systems, and charging and swapping stations, the electricity generated by renewable energy is used for hydrogen production. By rationally adjusting and optimizing the combination of various power sources, clean and green electricity hydrogen production with zero emissions can be achieved throughout the entire process.

[0061] Hydrogen is supplied to hydrogen fuel cell units by hydrogen supply pipelines, hydrogen storage pipelines, and hydrogen transportation pipelines, and hydrogen is supplied to hydrogen refueling stations by electric hydrogen production equipment and hydrogen fuel cell storage equipment, thereby improving the greenness of hydrogen use in microgrids.

[0062] By implementing a joint monitoring strategy for power supply lines, power connection lines, power transmission lines, electric hydrogen production equipment, hydrogen fuel cell storage equipment, hydrogen refueling stations, charging and battery swapping stations, as well as hydrogen supply pipelines, hydrogen storage pipelines, and hydrogen transportation pipelines through the central control module, power monitoring modules, and hydrogen consumption monitoring modules, the comprehensive utilization level of renewable energy can be improved, and the synergistic utilization of electricity and hydrogen can be achieved.

[0063] Based on the above embodiments, and taking into account factors such as renewable resource availability, hydrogen demand at hydrogen refueling stations, discharge demand at charging and battery swapping stations, and power output, this utility model proposes a renewable energy microgrid system based on electro-hydrogen coupling and coordination. This system optimizes, adjusts, and combines wind power generation systems, photovoltaic power generation systems, hydrogen fuel cell power generation systems, power supply lines, power interconnection lines, power transmission lines, electro-hydrogen production equipment, hydrogen fuel cell storage equipment, hydrogen storage pipelines, hydrogen supply pipelines, hydrogen transmission pipelines, charging and battery swapping stations, hydrogen refueling stations, power monitoring modules, and hydrogen consumption monitoring modules to achieve coordinated and bidirectional circulation between renewable energy power generation and hydrogen production and consumption.

[0064] Based on the functional limitations provided by this utility model, those skilled in the art will clearly understand the structural features of the master control module. It is a physical structure that can be directly used in the market and by those skilled in the art. There is no improvement to the logic of the master control module. The logical relationship of the master control module is a built-in function of the master control module, and there is no improvement to the computer software of the master control module.

Claims

1. A renewable energy microgrid system based on electro-hydrogen coupling synergy, characterized in that: This includes wind power generation systems, photovoltaic power generation systems, hydrogen fuel cell power generation systems, electric hydrogen production equipment, charging and battery swapping stations, external oxygen supply systems, power collection busbars, power supply lines, power interconnection lines, power transmission lines, hydrogen fuel cell storage equipment, hydrogen fuel cell oxygen storage equipment, hydrogen storage pipelines, oxygen storage pipelines, hydrogen supply pipelines, oxygen supply pipelines, hydrogen transportation pipelines, external oxygen transportation pipelines, power monitoring modules, hydrogen consumption monitoring modules, oxygen consumption monitoring modules, and central control modules. The wind power generation system is connected to the power collection bus via wind power supply lines; The photovoltaic power generation system is connected to the power collection bus via a photovoltaic power supply line; The hydrogen fuel cell power generation system is connected to the power collection bus via a hydrogen fuel cell power supply line. The aforementioned electro-hydrogen production equipment is connected to a power collection bus via a power transmission line; The charging and battery swapping station is connected to the power collection bus via a power interconnection line; The aforementioned electro-hydrogen production equipment is connected to a hydrogen refueling station via a hydrogen transmission pipeline; The aforementioned electro-hydrogen production equipment is connected to an external oxygen supply system via an external oxygen pipeline; The aforementioned electric hydrogen production equipment is connected to a hydrogen fuel cell storage device via a hydrogen storage pipeline; The aforementioned hydrogen production equipment is connected to the oxygen storage equipment of the hydrogen fuel cell via an oxygen storage pipeline; The hydrogen fuel cell storage device is connected to the hydrogen fuel cell power generation system via a hydrogen supply pipeline. The oxygen storage device for the hydrogen fuel cell is connected to the hydrogen fuel cell power generation system via an oxygen supply pipeline.

2. A renewable energy microgrid system based on electro-hydrogen coupling synergy according to claim 1, characterized in that: The power monitoring modules include a wind power monitoring module, a photovoltaic power monitoring module, a hydrogen fuel cell power monitoring module, an electric hydrogen production power monitoring module, and a charging and battery swapping station power monitoring module. The hydrogen consumption monitoring module includes a first hydrogen consumption monitoring module, a second hydrogen consumption monitoring module, and a third hydrogen consumption monitoring module; The oxygen monitoring module includes a first oxygen monitoring module, a second oxygen monitoring module, and a third oxygen monitoring module; The wind power supply line is equipped with a wind power monitoring module; The photovoltaic power supply line is equipped with a photovoltaic power monitoring module; The hydrogen fuel cell power supply line is equipped with a hydrogen fuel cell power monitoring module; The power transmission line is equipped with an electric hydrogen production power monitoring module; The power connection line is equipped with a power monitoring module for charging and battery swapping stations; The hydrogen pipeline is equipped with a first hydrogen consumption monitoring module; The aforementioned external oxygen supply pipeline is equipped with a first oxygen consumption monitoring module; The hydrogen storage pipeline is equipped with a second hydrogen consumption monitoring module; The hydrogen storage pipeline is equipped with a second hydrogen consumption monitoring module; The hydrogen supply pipeline is equipped with a third hydrogen consumption monitoring module; The oxygen supply pipeline is equipped with a third oxygen monitoring module.

3. A renewable energy microgrid system based on electro-hydrogen coupling synergy according to claim 2, characterized in that: The aforementioned wind power monitoring module, photovoltaic power monitoring module, hydrogen fuel cell power monitoring module, charging and swapping station power monitoring module, electric hydrogen production power monitoring module, first hydrogen consumption monitoring module, second hydrogen consumption monitoring module, third hydrogen consumption monitoring module, first oxygen consumption monitoring module, second oxygen consumption monitoring module, third oxygen consumption monitoring module, and electric hydrogen production equipment connection control module; The wind power monitoring module is used to obtain the wind power supply P. W ; The photovoltaic power monitoring module is used to obtain the photovoltaic power supply P. P ; The hydrogen fuel cell power monitoring module is used to obtain the power supply P of the hydrogen fuel cell unit. H ; The aforementioned electro-hydrogen production power monitoring module is used to obtain the electrical power P consumed by the electro-hydrogen production system. E ; The power monitoring module of the charging and swapping station is used to obtain the charging power P of the charging and swapping station. C and the discharge power P of the charging and battery swapping station L ; The first hydrogen monitoring module is used to obtain the standard volume V2 of the hydrogen transmission pipeline and the rated standard volume V1 of the hydrogen storage equipment at the hydrogen refueling station. The second hydrogen monitoring module is used to obtain the standard volume V4 of the hydrogen storage device for the hydrogen fuel cell and the standard volume V of the hydrogen production device for the electro-hydrogen production device. H ; The second oxygen monitoring module is used to obtain the standard volume V6 of the hydrogen fuel cell oxygen storage device and the standard volume V of the electric hydrogen production device. O ; The third hydrogen monitoring module is used to obtain the rated standard volume of the hydrogen fuel cell storage device as V3; The third oxygen monitoring module is used to obtain the rated standard volume of the hydrogen fuel cell oxygen storage device as V5; The central control module is used to determine the power consumption P of the hydrogen production system reported by the hydrogen production equipment to the central control module. E With wind power supply P W Photovoltaic power supply P P Hydrogen fuel cell power supply P H Charging power P of charging and battery swapping stations C and the discharge power P of the charging and battery swapping station L The logical relationship and the standard hydrogen production volume V reported by the electric hydrogen generator to the central control module. H The logical relationship between the hydrogen storage equipment at the hydrogen refueling station (rated standard volume V1), the hydrogen pipeline (standard volume V2), the hydrogen fuel cell storage equipment (rated standard volume V3), and the hydrogen fuel cell storage equipment (standard volume V4), and the oxygen production standard volume V reported by the electro-hydrogen production equipment to the central control module. O Establish the logical relationship between the rated standard volume V5 and the standard volume V6 of the hydrogen fuel cell oxygen storage device, and send instructions.

4. A renewable energy microgrid system based on electro-hydrogen coupling synergy according to claim 1, characterized in that, The wind power generation system includes a wind turbine and a step-up unit connected in sequence; the photovoltaic power generation system includes a photovoltaic matrix and a step-up unit connected in sequence; the hydrogen fuel cell power generation system includes a hydrogen fuel cell stack and a step-up unit connected in sequence; the step-up unit includes a step-up transformer low-voltage busbar, a step-up transformer, and a step-up transformer high-voltage busbar connected in sequence.

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