CN112968477A - Large-scale low-cost hydrogen production system and method by electrolysis - Google Patents
Large-scale low-cost hydrogen production system and method by electrolysis Download PDFInfo
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- CN112968477A CN112968477A CN202110115962.1A CN202110115962A CN112968477A CN 112968477 A CN112968477 A CN 112968477A CN 202110115962 A CN202110115962 A CN 202110115962A CN 112968477 A CN112968477 A CN 112968477A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/466—Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/003—Load forecast, e.g. methods or systems for forecasting future load demand
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
- H02J3/144—Demand-response operation of the power transmission or distribution network
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/40—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation wherein a plurality of decentralised, dispersed or local energy generation technologies are operated simultaneously
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
- Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/133—Renewable energy sources, e.g. sunlight
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
Abstract
The invention relates to a large-scale low-cost electrolytic hydrogen production system and a method, wherein the large-scale low-cost electrolytic hydrogen production system comprises: the power grid dispatching device is connected with a power grid; the electrolysis hydrogen production station is connected with the power grid dispatching device; the waste heat recovery device is connected with the electrolytic hydrogen production station; and the hydrogen storage station is connected with the electrolysis hydrogen production station. The large-scale low-cost hydrogen production method by electrolysis comprises the following steps: the power grid dispatching device receives an electrolysis hydrogen production load curve sent by a power grid dispatching center at fixed time; the electrolytic hydrogen production station operates according to the electrolytic hydrogen production load curve and the load following instruction; hydrogen generated by electrolytic hydrogen production is stored in the hydrogen storage station; the hydrogen storage amount of the hydrogen storage station is set according to the hydrogen demand of the hydrogen user. The technical scheme of the invention has the beneficial effects that: the consumption of large-scale renewable energy sources is promoted, and the electricity abandon rate is reduced; the stability of the power system is improved; a large amount of inexpensive green hydrogen can be obtained.
Description
Technical Field
The invention relates to the field of electrolytic hydrogen production, and mainly relates to a large-scale low-cost electrolytic hydrogen production system and method.
Background
The hydrogen source is wide, the carbon is clean, the energy density is high, the conversion efficiency is high, the hydrogen can be used as an industrial raw material or fuel, and the hydrogen storage device has the advantage of large-scale long-period energy storage.
Under the background, the demand of hydrogen in the fields of traffic, buildings, industry and the like in China is more and more intense. At present, the industrial hydrogen production technology mainly comprises hydrogen production by fossil fuel, hydrogen production by industrial byproducts and hydrogen production by water electrolysis. The hydrogen production method by using fossil fuel is a low-cost hydrogen production method, but a large amount of carbon emission is generated in the hydrogen production process, so that the hydrogen production method can be widely accepted and applied by combining a carbon capture and sequestration technology in the future. The industrial byproduct hydrogen production process is mature, the hydrogen production cost is low, but the regional limitation is obvious. The water electrolysis hydrogen production technology has the advantages of simple flow, no pollution in the process, high product purity and wide development prospect. However, the cost of hydrogen production by water electrolysis is obviously influenced by electric price, and the cost of hydrogen production is higher, which limits the popularization and application of the method in the fields of hydrogen metallurgy, chemical raw materials, heat supply and the like.
Disclosure of Invention
The invention aims to provide a large-scale low-cost electrolytic hydrogen production system and a large-scale low-cost electrolytic hydrogen production method which can greatly reduce the cost of electrolytic hydrogen production.
The large-scale low-cost electrolytic hydrogen production system comprises: the power grid dispatching device is connected with the power grid and used for receiving an electrolytic hydrogen production load curve and a load following instruction sent by the power grid dispatching center and sending the electrolytic hydrogen production load curve and the load following instruction to the electrolytic hydrogen production station; the electrolytic hydrogen production station is respectively connected with the power grid and the power grid dispatching device and operates according to an electrolytic hydrogen production load curve and a load following instruction; the waste heat recovery device is connected with the electrolytic hydrogen production station; and the hydrogen storage station connected with the electrolytic hydrogen production station sets the hydrogen storage amount according to the hydrogen using requirement of a hydrogen user.
The large-scale low-cost electrolytic hydrogen production system of the invention is provided with an oxygen storage station connected with the electrolytic hydrogen production station and used for supplying nearby aerobic users.
The large-scale low-cost electrolytic hydrogen production system comprises an electrolytic hydrogen production station, a hydrogen production station and a hydrogen production system, wherein the electrolytic hydrogen production station is an alkaline electrolytic water hydrogen production device, a proton exchange membrane electrolytic hydrogen production device or a high-temperature solid oxide electrolytic hydrogen production device, or any mixture of the three hydrogen production devices.
The large-scale low-cost electrolytic hydrogen production system comprises a hydrogen storage station, a hydrogen storage system and a hydrogen supply system.
The large-scale low-cost electrolytic hydrogen production system comprises a waste heat recovery device, a waste heat recovery device and a waste heat recovery device.
According to the large-scale low-cost electrolytic hydrogen production system, the electrolytic hydrogen production load curve is generated by subtracting the load predicted value from the wind power and photovoltaic power generation predicted value by the power grid dispatching center.
The invention discloses a large-scale low-cost hydrogen production method by electrolysis, which comprises the following steps: the power grid dispatching device receives an electrolysis hydrogen production load curve sent by a power grid dispatching center at fixed time; the electrolytic hydrogen production station operates according to the electrolytic hydrogen production load curve and the load following instruction; hydrogen generated by electrolytic hydrogen production is stored in the hydrogen storage station; the hydrogen storage amount of the hydrogen storage station is set according to the hydrogen demand of the hydrogen user.
The large-scale low-cost hydrogen production method by electrolysis comprises the following steps of: when the load of the power grid is in a peak period, the electrolytic hydrogen-producing station reduces the output to operate according to the power adjustment instruction, and when the load of the power grid is in a low valley period, the electrolytic hydrogen-producing station increases the output until the electrolytic hydrogen-producing station operates at full output.
The large-scale low-cost electrolytic hydrogen production method of the invention, wherein the hydrogen storage amount of the hydrogen storage station is set according to the hydrogen demand of hydrogen users, and comprises the following steps: the amount of hydrogen stored ensures a steady demand for hydrogen users over a period of time when they need a continuous steady demand for hydrogen, including but not limited to a hydrogen refueling station, a hydrogen metallurgy base, a fuel cell cogeneration plant.
The invention relates to a large-scale low-cost electrolytic hydrogen production method, wherein oxygen which is a byproduct of electrolytic hydrogen production is stored in an oxygen storage station and is supplied to nearby aerobic users, and waste heat generated by electrolytic hydrogen production is recycled by a waste heat device and is used for supplying hot water to peripheral areas and heating in winter.
The technical scheme of the invention has the beneficial effects that: the consumption of large-scale renewable energy sources is promoted, and the electricity abandon rate is reduced; the stability of the power system is improved; a large amount of inexpensive green hydrogen can be obtained.
Drawings
FIG. 1 is a schematic diagram of the large-scale low-cost electrolytic hydrogen production system of the present invention.
Detailed Description
As shown in fig. 1, the large-scale low-cost electrolytic hydrogen production system of the present invention comprises: the power grid dispatching device is connected with the power grid and used for receiving an electrolytic hydrogen production load curve and a load following instruction sent by the power grid dispatching center and sending the electrolytic hydrogen production load curve and the load following instruction to the electrolytic hydrogen production station; the electrolytic hydrogen production station is respectively connected with the power grid and the power grid dispatching device and operates according to an electrolytic hydrogen production load curve and a load following instruction; the waste heat recovery device is connected with the electrolytic hydrogen production station; and the hydrogen storage station connected with the electrolytic hydrogen production station sets the hydrogen storage amount according to the hydrogen using requirement of a hydrogen user.
The large-scale low-cost electrolytic hydrogen production system of the invention is provided with an oxygen storage station connected with the electrolytic hydrogen production station and used for supplying nearby aerobic users.
The large-scale low-cost electrolytic hydrogen production system comprises an electrolytic hydrogen production station, a hydrogen production station and a hydrogen production system, wherein the electrolytic hydrogen production station is an alkaline electrolytic water hydrogen production device, a proton exchange membrane electrolytic hydrogen production device or a high-temperature solid oxide electrolytic hydrogen production device, or any mixture of the three hydrogen production devices.
The large-scale low-cost electrolytic hydrogen production system comprises a hydrogen storage station, a hydrogen storage system and a hydrogen supply system.
The large-scale low-cost electrolytic hydrogen production system comprises a waste heat recovery device, a waste heat recovery device and a waste heat recovery device.
According to the large-scale low-cost electrolytic hydrogen production system, the electrolytic hydrogen production load curve is generated by subtracting the load predicted value from the wind power and photovoltaic power generation predicted value by the power grid dispatching center.
The invention discloses a large-scale low-cost hydrogen production method by electrolysis, which comprises the following steps: the power grid dispatching device receives an electrolysis hydrogen production load curve sent by a power grid dispatching center at fixed time; the electrolytic hydrogen production station operates according to the electrolytic hydrogen production load curve and the load following instruction; hydrogen generated by electrolytic hydrogen production is stored in the hydrogen storage station; the hydrogen storage amount of the hydrogen storage station is set according to the hydrogen demand of the hydrogen user.
The large-scale low-cost hydrogen production method by electrolysis comprises the following steps of: when the load of the power grid is in a peak period, the electrolytic hydrogen-producing station reduces the output to operate according to the power adjustment instruction, and when the load of the power grid is in a low valley period, the electrolytic hydrogen-producing station increases the output until the electrolytic hydrogen-producing station operates at full output.
The large-scale low-cost electrolytic hydrogen production method of the invention, wherein the hydrogen storage amount of the hydrogen storage station is set according to the hydrogen demand of hydrogen users, and comprises the following steps: the amount of hydrogen stored ensures a steady demand for hydrogen users over a period of time when they need a continuous steady demand for hydrogen, including but not limited to a hydrogen refueling station, a hydrogen metallurgy base, a fuel cell cogeneration plant.
The invention relates to a large-scale low-cost electrolytic hydrogen production method, wherein oxygen which is a byproduct of electrolytic hydrogen production is stored in an oxygen storage station and is supplied to nearby aerobic users, and waste heat generated by electrolytic hydrogen production is recycled by a waste heat device and is used for supplying hot water to peripheral areas and heating in winter.
The electrolysis hydrogen production station is an alkaline electrolysis water hydrogen production device, a proton exchange membrane electrolysis hydrogen production device or a high-temperature solid oxide electrolysis hydrogen production device, or any mixture of the three devices; the hydrogen storage station is used for ultrahigh pressure gas hydrogen storage or liquid hydrogen storage; the oxygen storage station is used for storing high-pressure gaseous oxygen or liquid oxygen; the waste heat recovery device is a water-water heat exchanger or a heat pump.
The large-scale low-cost electrolytic hydrogen production method of the invention comprises the following steps: when the system works, the power grid dispatching device receives an electrolysis hydrogen production load curve sent by the power grid dispatching center at fixed time (the load curve is generated by subtracting a load predicted value from a wind power and photovoltaic power generation predicted value by the power grid dispatching center, so that the electricity abandonment rate of the wind power and the photovoltaic power generation is reduced), and the large-capacity electrolysis hydrogen production station is used as a flexible regulation load to operate according to the load curve. Meanwhile, the power grid dispatching device receives a load following instruction sent by the power grid dispatching center in real time, when the power grid load is in a peak period, the electrolytic hydrogen-producing station lowers the output to operate according to the power adjusting instruction, and when the power grid load is in a valley period, the electrolytic hydrogen-producing station increases the output until the output is operated. Hydrogen generated by electrolytic hydrogen production is stored in a hydrogen storage station, the hydrogen storage amount of the hydrogen storage station is set according to the hydrogen utilization requirement of hydrogen users (when the hydrogen users need continuous and stable hydrogen utilization requirement, the hydrogen storage amount needs to guarantee the stable requirement of the hydrogen users for a period of time), and the hydrogen users comprise but are not limited to a hydrogenation station, a hydrogen metallurgy base, fuel cell cogeneration, natural gas hydrogen mixing, building heat supply, industrial heat supply, hydrogen power generation, synthetic chemical raw materials and the like. The oxygen generated by the electrolytic hydrogen production is stored in the oxygen storage station and is supplied to nearby aerobic users, including but not limited to oxygen-enriched combustion of a thermal power generating unit, a hydrogen metallurgy base, a synthetic chemical raw material and the like. In addition, the waste heat generated by the electrolytic hydrogen production (the alkaline water electrolysis and proton exchange membrane electrolysis device generates hot water with the temperature of 70-80 ℃) is recovered by a waste heat device for supplying hot water in the peripheral area and heating in winter.
The technical scheme of the invention has the following beneficial effects:
1. promote the consumption of large-scale renewable energy sources, reduce the power abandon rate: in the past, when the power generation output is larger than the power load demand and the power grid cannot be adjusted normally, electricity generated by renewable energy sources can only be abandoned (wind, light and water abandonment is abandoned), and a large amount of energy is wasted. Meanwhile, when the power generation ratio of renewable energy sources is getting heavier and heavier in the future, the electricity abandoning phenomenon is more serious. The large-scale electrolytic hydrogen production station is used for flexibly adjusting the load, can adjust the running power according to the output of renewable energy sources and the real-time change of the load demand side, plays the role of buffers at the supply side and the demand side, and obviously reduces the electricity abandonment phenomenon;
2. the stability of the power system is improved: the electrolytic hydrogen production device has high power regulation speed and wide range (the power regulation range of the alkaline water electrolysis device is 20-100%, the power regulation range of the proton exchange membrane electrolysis device is 0-100%, and the power regulation range of the high-temperature solid oxide electrolysis device is-100%), and can maintain the stability of power and frequency of a power grid through quick output regulation;
3. a large amount of inexpensive green hydrogen is available: the electrolysis hydrogen-making station mainly utilizes electricity from off-peak electricity or abandoned electricity, so that the electricity price cost is very low, the prepared hydrogen cost can be ensured to have enough competitiveness, the electrolysis hydrogen-making station can be applied to industries such as hydrogen metallurgy and chemical industry which have large demands on cheap hydrogen on a large scale, and the clean replacement process of China is powerfully promoted.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A large-scale, low-cost electrolytic hydrogen production system, comprising: the power grid dispatching device is connected with the power grid and used for receiving an electrolytic hydrogen production load curve and a load following instruction sent by the power grid dispatching center and sending the electrolytic hydrogen production load curve and the load following instruction to the electrolytic hydrogen production station; the electrolytic hydrogen production station is respectively connected with the power grid and the power grid dispatching device and operates according to an electrolytic hydrogen production load curve and a load following instruction; the waste heat recovery device is connected with the electrolytic hydrogen production station; and the hydrogen storage station connected with the electrolytic hydrogen production station sets the hydrogen storage amount according to the hydrogen using requirement of a hydrogen user.
2. The large scale, low cost electrolytic hydrogen production system of claim 1, wherein an oxygen storage station is connected to the electrolytic hydrogen production station for supplying nearby aerobic users.
3. The large-scale low-cost electrolytic hydrogen production system according to claim 2, wherein the electrolytic hydrogen production station is an alkaline electrolytic water hydrogen production device, a proton exchange membrane electrolytic hydrogen production device or a high-temperature solid oxide electrolytic hydrogen production device, or any mixture of the three hydrogen production devices.
4. The large scale, low cost electrolytic hydrogen production system of claim 3, where the hydrogen storage station is an ultra-high pressure gaseous hydrogen storage station or a liquid hydrogen storage station.
5. The large-scale low-cost electrolytic hydrogen production system according to claim 4, wherein the waste heat recovery device is a water-water heat exchanger or a heat pump.
6. The large-scale low-cost electrolytic hydrogen production system according to claim 5, wherein the electrolytic hydrogen production load curve is generated by the power grid dispatching center according to the predicted value of wind power and photovoltaic power generation amount minus the predicted value of load.
7. A large-scale low-cost hydrogen production method by electrolysis is characterized by comprising the following steps: the power grid dispatching device receives an electrolysis hydrogen production load curve sent by a power grid dispatching center at fixed time; the electrolytic hydrogen production station operates according to the electrolytic hydrogen production load curve and the load following instruction; hydrogen generated by electrolytic hydrogen production is stored in the hydrogen storage station; the hydrogen storage amount of the hydrogen storage station is set according to the hydrogen demand of the hydrogen user.
8. The large-scale low-cost electrolytic hydrogen production method according to claim 7, wherein the operation of the electrolytic hydrogen production station according to the electrolytic hydrogen production load curve and the load following instruction comprises: when the load of the power grid is in a peak period, the electrolytic hydrogen-producing station reduces the output to operate according to the power adjustment instruction, and when the load of the power grid is in a low valley period, the electrolytic hydrogen-producing station increases the output until the electrolytic hydrogen-producing station operates at full output.
9. The large-scale low-cost hydrogen production by electrolysis according to claim 8, wherein the setting of the hydrogen storage amount of the hydrogen storage station according to the hydrogen demand of the hydrogen user comprises: the amount of hydrogen stored ensures a steady demand for hydrogen users over a period of time when they need a continuous steady demand for hydrogen, including but not limited to a hydrogen refueling station, a hydrogen metallurgy base, a fuel cell cogeneration plant.
10. The large-scale low-cost hydrogen production by electrolysis method according to claim 9, wherein the oxygen as a byproduct of hydrogen production by electrolysis is stored in an oxygen storage station and supplied to nearby aerobic users, and the waste heat generated by hydrogen production by electrolysis is recovered by a waste heat device for supplying hot water to surrounding areas and heating in winter.
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