Deep off-peak electricity hydrogen production energy storage system and method
Through the deep-low electric hydrogen energy storage system, electrolyzed water is used to generate hydrogen and store it in the medium-pressure gas pipeline network, which solves the problem of low power energy storage efficiency in the existing technology, and achieves efficient power storage and gas distribution optimization .
Patent Information
- Application Number
- CN202411480584.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-23
- Publication Date
- 2025-01-10
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The existing power energy storage technology is relatively low when utilizing deep trough electricity, especially the efficiency of pumped storage and compressed air energy storage does not exceed 80% and 70%, making it difficult to make full use of power storage.
Design a deep-trough electric hydrogen-generating energy storage system, through electrolyzing water, use the power grid power in the deep-trough period to produce hydrogen, generate hydrogen and store it in the medium-pressure gas pipeline network, and use the energy storage battery pack in the non-deep-trough period Supply power to hydrogen production equipment, and combine solar panels to replenish charging energy to achieve efficient storage and utilization of hydrogen.
It has achieved efficient storage and utilization of deep-low electricity, improved the efficiency of urban gas transmission and distribution, avoided the problem of power abandonment in the case of excessive electricity, and improved the overall utilization rate of electricity.
Smart Images
Figure CN119298174A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of electric energy storage, and in particular relates to a deep valley electricity hydrogen production energy storage system and method. Background Art
[0002] Power storage refers to the storage of electrical energy. In the power system, the production and use of electrical energy are carried out simultaneously and are balanced in quantity, but the power consumption is always fluctuating. At the same time, the possibility of failure of power generation equipment must also be considered. Therefore, the capacity of power generation equipment put into operation in the system is often higher than the power consumption, so that excess electrical energy can be stored and adjusted for use when the reserve power increases.
[0003] The more common existing technologies are pumped storage and compressed air energy storage, but the efficiency does not exceed 80% and 70% respectively. Therefore, how to make full use of deep valley electricity for power storage is a difficult problem that needs to be solved urgently. Summary of the invention
[0004] The purpose of the embodiments of the present invention is to provide a deep valley electricity hydrogen production energy storage system, aiming to solve the problems raised in the above background technology.
[0005] The embodiment of the present invention is implemented as follows: a deep valley electricity hydrogen production energy storage system, the system comprising: A hydrogen production device connected to the medium-pressure gas pipeline network and used for inputting the generated hydrogen into the medium-pressure gas pipeline network; Energy storage battery pack, connected to hydrogen production equipment; The power grid is connected to the hydrogen production equipment and the energy storage battery group. During the deep valley period, the power grid supplies power to the hydrogen production equipment for electrolytic hydrogen production and charges the energy storage battery group at the same time. During the non-deep valley period, the energy storage battery group supplies power to the hydrogen production equipment for electrolytic hydrogen production.
[0006] Preferably, the energy storage battery pack comprises an output mobile power supply and an input mobile power supply, the input mobile power supply is connected to the power grid for storing electric energy, and the output mobile power supply is connected to the hydrogen production equipment for supplying power.
[0007] Preferably, the system further comprises a supplementary electric energy device connected to the hydrogen production device and used for supplying power to the hydrogen production device.
[0008] Preferably, the electric energy supplementation device is a solar panel.
[0009] Preferably, the hydrogen production equipment is one of PEM, ALK and AEM hydrogen production equipment.
[0010] Another object of the embodiment of the present invention is to provide a deep valley electricity hydrogen production energy storage method, using the deep valley electricity hydrogen production energy storage system, including the following steps: S1. A hydrogen production device is connected to a medium-pressure gas pipeline network, equipped with an output mobile power supply and an input mobile power supply, the power grid is connected to the hydrogen production device and the input mobile power supply, and a supplementary solar panel is connected to the hydrogen production device, wherein the hydrogen production device, the output mobile power supply, the input mobile power supply and the solar panel are connected in parallel; S1. During deep valley periods, the grid outputs valley electricity to power the hydrogen production equipment for electrolytic hydrogen production. The hydrogen is collected and input into the medium-pressure gas pipeline network in proportion to be mixed with natural gas. At the same time, the grid charges the input mobile power supply. During non-deep valley periods, the mobile power supply is output to power the hydrogen production equipment, and solar panels can be used to generate electricity for supplementary purposes.
[0011] A deep valley electricity hydrogen production energy storage system provided in an embodiment of the present invention utilizes the technical solution of water electrolysis hydrogen production. The hydrogen production equipment is equipped with an energy storage battery group, specifically a large-capacity battery group or a storage battery group, which is divided into two groups, one group for input and one group for output, which are used in turn. In deep valley periods, valley electricity is directly used to produce hydrogen, and the energy storage battery group can also be charged to store low-cost electricity. In non-deep valley periods, the energy storage battery group is used to supply power to the hydrogen production equipment for electrolytic hydrogen production. After the produced hydrogen is collected, it is input into a medium-pressure gas pipeline network in a certain proportion so that it has gas interchangeability after being fully mixed with natural gas, and does not affect the normal use of the end-user burner. Electric energy is converted into hydrogen through water electrolysis, and the hydrogen is quickly mixed into the natural gas, thereby being stored in the medium-pressure pipeline network. The energy storage efficiency is very high, so as to achieve the purpose of utilizing deep valley electricity to produce hydrogen, optimizing urban gas transmission and distribution, and efficiently storing and utilizing electric energy. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 A block diagram of a deep valley electricity-to-hydrogen energy storage system provided in an embodiment of the present invention (the dotted line represents the hydrogen pipeline).
[0013] In the attached figure: 1-hydrogen production equipment; 2-output mobile power supply; 3-input mobile power supply; 4-power grid; 5-solar panel; 6-medium pressure gas pipeline network. DETAILED DESCRIPTION
[0014] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.
[0015] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.
[0016] like Figure 1 As shown, it is a structural diagram of a deep valley electricity hydrogen production energy storage system provided by an embodiment of the present invention, and the system includes: The hydrogen production equipment 1 is connected to the medium-pressure gas pipeline network 6 and is used to input the generated hydrogen into the medium-pressure gas pipeline network 6; An energy storage battery group is connected to the hydrogen production equipment 1; The power grid 4 is connected to the hydrogen production equipment 1 and the energy storage battery group. During the deep valley period, the power grid 4 supplies power to the hydrogen production equipment 1 for electrolytic hydrogen production and charges the energy storage battery group at the same time. During the non-deep valley period, the energy storage battery group supplies power to the hydrogen production equipment 1 for electrolytic hydrogen production; The energy storage battery pack includes an output mobile power supply 2 and an input mobile power supply 3. The input mobile power supply 2 is connected to a power grid 4 for storing electric energy, and the output mobile power supply 2 is connected to a hydrogen production device 1 for supplying power.
[0017] In one embodiment of the present invention, the deep valley electricity hydrogen production energy storage system aims at the problems raised in the prior art, and utilizes the technical solution of water electrolysis hydrogen production. The hydrogen production equipment 1 is equipped with an energy storage battery group, specifically a large-capacity battery group or a storage battery group, which is divided into two groups, one group for input and one group for output, which are used in turn. In the deep valley period, valley electricity is directly used to produce hydrogen, and the energy storage battery group can also be charged to store the low-cost electricity. In the non-deep valley period, the energy storage battery group is used to power the hydrogen production equipment 1 for electrolysis hydrogen production. After the produced hydrogen is collected, it is input into the medium-pressure gas pipeline network 6 in a certain proportion so that it has gas interchangeability after being fully mixed with natural gas, and does not affect the normal use of the end-user burner. Electric energy is converted into hydrogen through water electrolysis, and the hydrogen is quickly mixed into the natural gas, so as to be stored in the medium-pressure pipeline network. The energy storage efficiency is very high, so as to achieve the purpose of utilizing deep valley electricity to produce hydrogen, optimizing urban gas transmission and distribution, and efficiently storing and utilizing electric energy.
[0018] like Figure 1 As shown, as another preferred embodiment of the present invention, the system further includes a supplementary electric energy device connected to the hydrogen production device 1 and used to supply power to the hydrogen production device 1; Specifically, the electric energy supplementing device may be a solar cell panel 5 .
[0019] When the output mobile power source 2 is used to supply power to the equipment during non-deep valley periods, the solar panel 5 is used to generate electricity as a supplement to meet the power demand of the hydrogen production equipment 1.
[0020] like Figure 1 As shown, as a preferred embodiment of the present invention, the hydrogen production equipment 1 is one of PEM, ALK, and AEM hydrogen production equipment.
[0021] The use of PEM, ALK, AEM and other hydrogen production equipment has a wide adaptability to power sources.
[0022] Another embodiment of the present invention further provides a deep valley electricity hydrogen production energy storage method, using the deep valley electricity hydrogen production energy storage system, comprising the following steps: S1. The hydrogen production equipment 1 is connected to the medium-pressure gas pipeline network 6. The existing medium-pressure gas pipeline network 6 is used as an energy storage carrier, which is more efficient and economical. The output mobile power supply 2 and the input mobile power supply 3 are equipped. The power grid 4 is connected to the hydrogen production equipment 1 and the input mobile power supply 3. The supplementary solar panel 5 is connected to the hydrogen production equipment 1. The hydrogen production equipment 1, the output mobile power supply 2, the input mobile power supply 3 and the solar panel 5 are connected in parallel. Different power supply modes are used according to the peak and valley fluctuations of electricity prices to achieve the best economic benefits and solve the problem of abandoned light and electricity. S1. During deep valley periods, the power grid 4 outputs valley electricity to supply power to the hydrogen production equipment 1 for electrolytic hydrogen production. After the hydrogen is collected, it is input into the medium-pressure gas pipeline network 6 in proportion and mixed with natural gas. At the same time, the power grid 4 charges the input mobile power supply 3. During non-deep valley periods, the mobile power supply 2 is output to supply power to the hydrogen production equipment 1, and the solar panel 5 can be used to generate electricity for supplement.
[0023] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A deep valley electricity hydrogen production energy storage system, characterized in that: The system comprises: A hydrogen production device (1) is connected to the medium-pressure gas pipeline network (6) and is used to input the generated hydrogen into the medium-pressure gas pipeline network (6); An energy storage battery group connected to the hydrogen production equipment (1); The power grid (4) is connected to the hydrogen production equipment (1) and the energy storage battery group. During the deep valley period, the power grid (4) supplies power to the hydrogen production equipment (1) to produce hydrogen by electrolysis, and charges the energy storage battery group at the same time. During the non-deep valley period, the energy storage battery group supplies power to the hydrogen production equipment (1) to produce hydrogen by electrolysis.
2. The deep valley electricity hydrogen production energy storage system according to claim 1 is characterized in that: The energy storage battery pack comprises an output mobile power source (2) and an input mobile power source (3), wherein the input mobile power source (3) is connected to a power grid (4) for storing electric energy, and the output mobile power source (2) is connected to a hydrogen production device (1) for supplying power.
3. The deep valley electricity hydrogen production energy storage system according to claim 1 is characterized in that: The system further comprises an electric energy supplement device connected to the hydrogen production device (1) and used for supplying power to the hydrogen production device (1).
4. The deep valley electricity hydrogen production energy storage system according to claim 3 is characterized in that: The electric energy supplementation device is a solar cell panel (5).
5. The deep valley electricity hydrogen production energy storage system according to claim 1 is characterized in that: The hydrogen production equipment (1) is one of PEM, ALK and AEM hydrogen production equipment.
6. A deep valley electricity hydrogen production and energy storage method, characterized in that: The deep valley electricity hydrogen production energy storage system as claimed in any one of claims 1 to 5 comprises the following steps: S1, a hydrogen production device (1) is connected to a medium-pressure gas pipeline network (6), and is equipped with an output mobile power supply (2) and an input mobile power supply (3), a power grid (4) is connected to the hydrogen production device (1) and the input mobile power supply (3), and a supplementary solar cell panel (5) is connected to the hydrogen production device (1), wherein the hydrogen production device (1), the output mobile power supply (2), the input mobile power supply (3) and the solar cell panel (5) are connected in parallel; S1. During deep valley periods, the power grid (4) outputs valley electricity to supply power to the hydrogen production equipment (1) for electrolytic hydrogen production. The hydrogen is collected and input into the medium-pressure gas pipeline network (6) in proportion to be mixed with natural gas. At the same time, the power grid (4) charges the input mobile power supply (3). During non-deep valley periods, the output mobile power supply (2) supplies power to the hydrogen production equipment (1), and the solar panel (5) generates electricity for supplementary purposes.