CN212114804U - Off-grid wind power hydrogen production system - Google Patents

Off-grid wind power hydrogen production system Download PDF

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Publication number
CN212114804U
CN212114804U CN202021063528.0U CN202021063528U CN212114804U CN 212114804 U CN212114804 U CN 212114804U CN 202021063528 U CN202021063528 U CN 202021063528U CN 212114804 U CN212114804 U CN 212114804U
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hydrogen production
hydrogen
direct current
storage device
wind power
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田江南
周军
涂宏
刘军梅
徐淑姣
张恬
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North China Power Engineering Co Ltd of China Power Engineering Consulting Group
North China Power Engineering Beijing Co Ltd
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North China Power Engineering Co Ltd of China Power Engineering Consulting Group
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30Hydrogen technology
    • Y02E60/36Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/10Process efficiency
    • Y02P20/133Renewable energy sources, e.g. sunlight
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00Climate change mitigation technologies for sector-wide applications
    • Y02P80/20Climate change mitigation technologies for sector-wide applications using renewable energy

Abstract

The utility model relates to an off-grid wind power hydrogen production system, which comprises wind driven generators, rectifiers, direct current buses, a battery energy storage device, an electrolysis hydrogen production device and a hydrogen storage device, wherein the rectifiers are respectively connected to the output ends of the wind driven generators; the direct current bus is connected with the collecting output end of the rectifier, the battery energy storage device is connected to the direct current bus through a direct current branch, the electrolytic hydrogen production device is connected to the direct current bus through a direct current branch, and the hydrogen storage device is connected to the electrolytic hydrogen production device through a hydrogen pipeline. The utility model discloses mainly solved the electric energy instability problem of using wind power generation as hydrogen manufacturing system power, extensive applicability, control are simple, easily realize the industrialization, do benefit to the development that promotes new forms of energy hydrogen manufacturing industry.

Description

Off-grid wind power hydrogen production system
Technical Field
The utility model belongs to the technical field of new forms of energy electricity generation hydrogen manufacturing, a wind-powered electricity generation hydrogen manufacturing system is related to, especially relate to the wind-powered electricity generation hydrogen manufacturing system who uses hydrogen manufacturing as the operation of main purpose off-grid.
Background
Hydrogen energy is of great interest due to its characteristics of being renewable, diverse in source, clean, efficient, high in calorific value and the like, and has recently become a major hotspot in the energy field. At present, most hydrogen energy in the market comes from coal gasification hydrogen production, and a small part of hydrogen energy comes from water electrolysis hydrogen production. The development of hydrogen production technology tends to be mature, wherein the raw material for hydrogen production by water electrolysis is water, and only a small amount of alkali liquor wastewater is generated in the production process, so that the technology is relatively environment-friendly hydrogen production technology.
On the other hand, in recent years, the total installed capacity of wind power in China is rapidly increased, but a large amount of wind abandon phenomenon occurs due to the fact that wind power is limited to be on line. The installed capacity of wind power in China is mainly concentrated in the three north area and the east coastal area, wind power facilities are generally constructed in a large-scale centralized manner, and the wind power available network capacity of the areas is far greater than the acceptable capacity of a power grid. In addition, wind power has the characteristics of intermittence, randomness and volatility, and a power grid has higher requirements on the quality of grid-connected wind power. Therefore, the areas with concentrated wind resources often have a large amount of wind abandon phenomena.
The development of the wind power hydrogen production technology is beneficial to solving the problem of local consumption of wind power, and the large-scale and multi-way efficient utilization of the distributed wind power generation technology can be realized. The wind power and hydrogen production technology are coupled, so that hydrogen can be used as clean fuel gas to supply gas to users, the complementary conversion from electric power to fuel gas is realized, and hydrogen energy can be directly utilized in the fields of electric power, chemical industry, automobiles and the like.
However, the wind power system has two characteristics of intermittence and randomness, and the two characteristics can cause adverse effects on the safety, the reliability and the hydrogen production efficiency of the electrolytic hydrogen production system. And because the wind power is fluctuant, the output power of the wind power is also changed, so that the matching between the capacity of the fan and the output power of the electrolytic hydrogen production system has certain difficulty.
CN 202444308U discloses a non-grid-connected wind power hydrogen production system, which comprises a fan, a control device, a hydrogen production device, an energy balance device, a storage battery and other main devices. The operation mode is as follows: when the output voltage of the fan is greater than the voltage of the storage battery, the fan charges the storage battery and supplies power to the hydrogen production device; when the output voltage of the fan is lower than the voltage of the storage battery, the storage battery and the wind power generation supply power to the hydrogen production device at the same time; and when the output voltage of the fan is greater than the upper limit of the hydrogen production device or less than the lower limit of the hydrogen production device, stopping the hydrogen production device. The stable operation of the hydrogen production device can be ensured when the output voltage of the fan is in a certain range, but the problem of wind power wide power caused by the change of the wind speed is still not solved, and the hydrogen production device faces the threat of frequent shutdown.
CN 110190629a discloses an islanding integrated energy system of hydrogen fuel cell. The power generation unit comprises photovoltaic power generation, wave power generation, wind power generation and tidal power generation; the energy storage unit comprises a lithium battery energy storage battery pack, a hydrogen energy storage unit and compressed air energy storage. The system solves the problem of wide power fluctuation of wind power by using a multi-energy complementation and multi-mode energy storage method, but has the defects of high equipment cost and large matching difficulty of the capacity of each unit due to numerous units required by the system, and is not favorable for realizing the landing of a project.
Therefore, it is necessary to improve the stability of the off-grid wind power hydrogen production system and the adaptability of wind power to the electrolytic hydrogen production system, and a main device and a capacity matching method based on the off-grid wind power hydrogen production system are provided urgently.
SUMMERY OF THE UTILITY MODEL
The utility model provides a technical problem lie in providing an off-grid wind-powered electricity generation hydrogen manufacturing system promptly, realize the coupling of the wind-powered electricity generation energy and hydrogen manufacturing technique to hydrogen manufacturing is the off-grid operating system of purpose, and the principal equipment is exerted oneself and can be carried out appropriate allotment according to the hydrogen energy demand in local market.
The technical means adopted by the utility model are as follows.
The utility model provides an off-grid wind-powered electricity generation hydrogen manufacturing system, it includes: the wind power generator comprises N wind power generators and N rectifiers which are respectively and correspondingly connected to the output end of each wind power generator, wherein N is more than or equal to 1; the system comprises a direct current bus, a battery energy storage device, an electrolytic hydrogen production device and a hydrogen storage device. The direct current bus is connected with the collecting output ends of the N rectifiers, the battery energy storage device is connected to the direct current bus through a direct current branch, and the electrolytic hydrogen production device is connected to the direct current bus through a direct current branch; the electrolytic hydrogen production device comprises M electrolytic hydrogen production devices, wherein M is more than or equal to 1, and when M is more than 1, the M electrolytic hydrogen production devices are arranged in parallel; the hydrogen storage device is connected with the hydrogen output end of the electrolytic hydrogen production device through a hydrogen pipeline.
The off-grid wind power hydrogen production system further comprises an oxygen storage device which is connected to the oxygen output end of the electrolytic hydrogen production device.
The off-grid wind power hydrogen production system can also comprise a fuel cell system, wherein the fuel cell system is connected with the hydrogen storage device through a hydrogen pipeline and is connected with a direct current bus through a direct current branch.
Wherein, the fuel cell system is directly connected with the electrolytic hydrogen production device through an oxygen pipeline, or the fuel cell system and the electrolytic hydrogen production device are connected through an additional oxygen storage device.
The hydrogen storage device can be connected with a hydrogen user side, and the battery energy storage device can be connected with a charging pile end of the electric automobile.
The capacity matching method based on the off-grid wind power hydrogen production system comprises the following steps:
step A, determining local hydrogen demand through market research;
b, determining the number M of electrolytic hydrogen production equipment contained in the electrolytic hydrogen production device according to 1.1-1.5 times of the hydrogen demand and the rated output of a single electrolytic hydrogen production equipment;
c, determining the energy consumption required by the electrolytic hydrogen production device according to the number M of the electrolytic hydrogen production devices and the energy consumption of a single electrolytic hydrogen production device;
d, determining the number N of the wind driven generators and the rectifiers according to the energy consumption required by the electrolytic hydrogen production device and the rated output power of the single wind driven generator;
and E, determining 5% -50% of the total power output by the N wind driven generators as the capacity of the battery energy storage device.
Wherein the rated output of the single electrolytic hydrogen production device is 100m3/h~1000m3And h, the rated output power of the wind driven generator is 1-10 MW.
The utility model discloses produced beneficial effect as follows.
(1) The utility model discloses utilize the direct electrolysis water hydrogen manufacturing of wind-powered electricity generation energy, can promote wind-powered electricity generation in time to be absorbed nearby, improve the utilization ratio of the local wind energy, the impact that can avoid bringing for the electric wire netting because of wind-powered electricity generation's volatility is moved from the net simultaneously.
(2) The output of the main equipment can be matched according to the hydrogen energy demand of the local market, and the hydrogen storage device or the battery energy storage device is used for adjusting, so that the off-grid operation system mainly aiming at hydrogen production can ensure the safe and stable operation of the hydrogen production system.
(3) The utility model mainly solves the problem of instability of electric energy by taking wind power generation as a power supply of a hydrogen production system, and has wide applicability, simple control and easy realization of industrialization; meanwhile, hydrogen production by electrolyzing water through renewable energy is a low-carbon clean road for sustainable development, and is beneficial to promoting the development of the hydrogen production industry of new energy.
Drawings
Fig. 1 is a schematic structural diagram of a planting embodiment of the off-grid wind power hydrogen production system of the present invention.
Fig. 2 is a schematic structural diagram of another embodiment of the off-grid wind power hydrogen production system of the present invention.
Detailed Description
As shown in fig. 1, it is a schematic structural diagram of an embodiment of the off-grid wind power hydrogen production system of the present invention, and the system mainly includes a wind power generator 1, a rectifier 2, a dc bus 3, a battery energy storage device 4, an electrolytic hydrogen production device 5 and a hydrogen storage device 6. The wind driven generators 1 and the rectifiers 2 are N, the output end of each wind driven generator 1 is correspondingly connected with 1 rectifier 2, and N is larger than or equal to 1; the direct current bus 3 is connected with the collecting output ends of the N rectifiers 2, the battery energy storage device 4 is connected to the direct current bus 3 through a direct current branch, and the electrolytic hydrogen production device 5 is also connected to the direct current bus 3 through a direct current branch; the electrolytic hydrogen production device 5 also comprises M electrolytic hydrogen production devices, wherein M is more than or equal to 1, and when M is more than 1, the M electrolytic hydrogen production devices are arranged in parallel; the hydrogen storage device 6 is connected with the hydrogen output end of the electrolytic hydrogen production device 5 through a hydrogen pipeline.
As shown in the figure, the system in this embodiment further includes a fuel cell system 7 connected to the hydrogen storage device 6 through a hydrogen pipeline, and the fuel cell system 7 is connected to the dc bus 3 through a dc branch.
Wherein, the fuel cell system 7 can also be directly connected with the oxygen output end of the electrolytic hydrogen production device 5 through an oxygen pipeline, and the byproduct-oxygen in the hydrogen production process is reused. Or as shown in fig. 2, the structure schematic diagram of another embodiment of the off-grid wind power hydrogen production system of the present invention is that an oxygen storage device 10 is directly disposed at the oxygen output end of the electrolytic hydrogen production device 5 for storing oxygen in the hydrogen production process for standby use, and meanwhile, the oxygen storage device 10 can also be connected to the fuel cell system 7 for oxygen delivery.
The utility model discloses off-grid wind-powered electricity generation hydrogen manufacturing system's operation principle: the N rectifiers 2 respectively convert the alternating current output by the corresponding N wind power generators 1 into direct current, and the direct current bus 3 converges the direct current output by the N rectifiers 2 into one path; the direct current bus 3 can transmit the electric energy to the battery energy storage device 4, the electrolytic hydrogen production device 5 and the fuel cell system 7, wherein the battery energy storage device 4 stores part of the electric energy for later use, and M electrolytic hydrogen production devices contained in the electrolytic hydrogen production device 5 can electrolyze H under the action of direct current to produce H2Conversion of O to H2And O2The hydrogen storage device 6 and the oxygen storage device 10 are respectively used for storing hydrogen and oxygen and respectively delivering the hydrogen and oxygen to the fuel cell system 7; fuel cellThe system 7 generates water through the reaction (combustion) of the catalytic material catalytic hydrogen and oxygen to discharge, and then transmits the electric energy to the direct current bus 3 and further to the battery energy storage device 4 to be stored. Of course, when the oxygen storage device 10 is not provided in the system or when the oxygen generated by the electrolytic hydrogen production device 5 is insufficient, air may be used instead of oxygen to supply the fuel cell system 7.
The battery energy storage device can store energy by a lithium ion battery or a large-scale sodium ion battery, or store energy by a super capacitor, preferably by the lithium ion battery. As mentioned above, when the wind driven generator is fully used, the battery energy storage device is used for storing partial energy under the condition of ensuring the stable operation of the electrolytic hydrogen production device; when the wind speed is unstable or too low and the hydrogen production capacity needs to be ensured, the battery energy storage device can release part of energy to stabilize the fluctuation of the electric energy or transmit the energy to the electrolytic hydrogen production device for hydrogen production.
In addition, the electrolytic hydrogen production mode of the electrolytic hydrogen production equipment can be as follows: alkaline water electrolysis, proton exchange membrane water electrolysis or solid oxide water electrolysis, preferably alkaline water electrolysis.
As shown in fig. 1-2, the hydrogen storage device 6 can be directly connected to a hydrogen client 8 for sale. Meanwhile, the battery energy storage device 4 can also be externally connected with the charging pile end 9 of the electric automobile, when the demand of hydrogen users for hydrogen is reduced, and the hydrogen storage capacity of the hydrogen storage device and the electric storage capacity of the battery energy storage device are respectively greater than 90% of the rated value of the hydrogen storage device, the battery energy storage device can supply power for the charging pile of the electric automobile.
To sum up, the energy storage mode of the off-grid wind power hydrogen production system of the utility model comprises the following two modes.
(1) When the demand of the market or the user for hydrogen becomes low, the hydrogen storage device can be used for storage.
(2) And converting the stored hydrogen energy into electric energy again by using the fuel cell system and storing the electric energy in the energy storage device.
Based on the capacity matching method of the off-grid wind power hydrogen production system, the capacity matching method comprises the following steps:
step A, determining local hydrogen demand through market research;
b, determining the number M of electrolytic hydrogen production equipment contained in the electrolytic hydrogen production device 5 according to 1.1-1.5 times of the hydrogen demand and the rated output of a single electrolytic hydrogen production equipment;
c, determining the energy consumption required by the electrolytic hydrogen production device 5 according to the number M of the electrolytic hydrogen production devices and the energy consumption of a single electrolytic hydrogen production device;
d, determining the number N of the wind driven generators 1 and the number N of the rectifiers 2 according to the energy consumption required by the electrolytic hydrogen production device 5 and the rated output power of the single wind driven generator 1;
and step E, determining 5% -50% of the total output power of the N wind driven generators 1 as the capacity of the battery energy storage device 4, for example, 5%, 10%, 20%, 30%, 40% and 50%, preferably 30%.
Wherein the rated output selectable range of the single electrolytic hydrogen production device is 100m3/h~1000m3H, for example, may be 100m3/h、500m3/h、1000m3H, preferably 500m3/h。
The rated output power (single unit capacity) of the wind driven generator is 1-10 MW, for example, 1MW, 1.5MW, 2MW, 2.5MW, 3MW, 10MW, etc., preferably 2.5 MW; the hub height of the wind driven generator is determined according to local wind resource conditions, and is generally 30-120m, for example, 30m, 40m, 50m and the like, and preferably 100 m; the annual hours of the wind driven generator is more than 3000h, such as 3100h, 3500h, 4000h, and preferably 4000 h.

Claims (6)

1. An off-grid wind power hydrogen production system is characterized by comprising:
the wind power generator comprises N wind power generators (1) and N rectifiers (2) which are respectively connected to the output end of each wind power generator (1) correspondingly, wherein N is more than or equal to 1;
the direct current bus (3), the said direct current bus (3) links with summarizing the carry-out terminal of the said N rectifiers (2);
the battery energy storage device (4), the battery energy storage device (4) is connected to the direct current bus (3) through a direct current branch;
the electrolytic hydrogen production device (5), the electrolytic hydrogen production device (5) is connected to the direct current bus (3) through a direct current branch; the electrolytic hydrogen production device (5) comprises M electrolytic hydrogen production devices, wherein M is more than or equal to 1, and when M is more than 1, the M electrolytic hydrogen production devices are arranged in parallel;
the hydrogen storage device (6) is connected to the hydrogen output end of the electrolytic hydrogen production device (5) through a hydrogen pipeline.
2. The off-grid wind power hydrogen production system according to claim 1, further comprising an oxygen storage device (10) connected to an oxygen output end of the electrolytic hydrogen production device (5).
3. The off-grid wind power hydrogen production system according to claim 1, further comprising a fuel cell system (7), wherein the fuel cell system (7) is connected to the hydrogen storage device (6) through a hydrogen pipeline, and the fuel cell system (7) is connected to the direct current bus (3) through a direct current branch.
4. The off-grid wind power hydrogen production system according to claim 3, wherein the fuel cell system (7) is directly connected with the oxygen output end of the electrolytic hydrogen production device (5) through an oxygen pipeline, or is connected with the oxygen output end of the electrolytic hydrogen production device through an additional oxygen storage device (10).
5. The off-grid wind power hydrogen production system according to any one of claims 1 to 4, wherein the hydrogen storage device (6) is connected to a hydrogen user side (8).
6. The off-grid wind power hydrogen production system according to any one of claims 1 to 4, wherein the battery energy storage device (4) is connected with a charging pile end (9) of an electric vehicle.
CN202021063528.0U 2020-06-10 2020-06-10 Off-grid wind power hydrogen production system Active CN212114804U (en)

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Application Number Priority Date Filing Date Title
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