Coal-electricity coupling hydrogen production system and method in electric power spot market environment

Abstract

The invention relates to a coal-electricity coupling hydrogen production system and method in an electric power spot market environment, and the system is used for determining load output data of a coal-fired generator set according to a market price signal and a scheduling instruction through a coal machine power generation module. And the water electrolysis hydrogen production module is used for receiving the load output provided by the coal machine power generation module and supplying power to the alkaline electrolytic bath and the proton exchange membrane electrolytic bath through power conversion equipment to prepare hydrogen. And the hydrogen storage module is used for receiving the hydrogen of the water electrolysis hydrogen production module, purifying the hydrogen and storing the hydrogen in a hydrogen storage tank area. And the gas turbine hydrogen doping module is used for conveying hydrogen to the gas mixing station and the combustion-steam combined cycle unit through a pipeline according to the hydrogen storage amount of the hydrogen storage module and the load requirement of the gas turbine. The energy utilization efficiency of the coal-electricity coupling hydrogen production system is improved, and the problem that the coal-electricity coupling hydrogen production system is low in resource utilization rate and further low in economic benefit when power is supplied beyond the selling negative electricity price in the related technology is solved.

Description

Technical Field

[0001] This application relates to the technical field of coal-electricity hydrogen production, and particularly to a coal-electricity coupled hydrogen production system and method in the environment of the electricity spot market. Background Technique

[0002] With the advancement of the electricity system reform and the gradual improvement of the electricity trading market, China has cancelled the coal-electricity price linkage mechanism and changed the current benchmark on-grid electricity price mechanism for coal-fired power generation to a market-based price mechanism of "benchmark price + floating up and down". In this context, the role of the electricity spot market becomes increasingly important. A typical operation is that the market operation agency provides the electricity demand forecast for each time period, and the power generation enterprises submit the electricity quantity and their quotations accordingly. Then the market operation agency arranges the power generation of specific units according to the optimal principle, and finally determines the winning enterprises and the corresponding power generation quantity.

[0003] In such an electricity spot market environment, the phenomenon of negative electricity price has become a unique indicator reflecting the supply-demand relationship. When the electricity supply significantly exceeds the demand, some generating units, especially wind power and photovoltaic generating units with off-site subsidies due to their low marginal cost, as well as coal-fired generating units considering the power supply guarantee responsibility or economic interests, may choose to bid at negative electricity prices. This is because new energy power such as wind power and photovoltaic power is difficult to store, and power surplus is likely to occur during low-load and high-generation periods; while coal-fired generating units tend to sell electricity at low prices or even negative electricity prices during the period of supply exceeding demand in order to maintain continuous operation, avoid the impact of frequent start-stop on the equipment life and performance, and ensure normal power generation in subsequent high-price periods, so as to maintain the operation of the units and ensure that the overall economic benefits are not greatly damaged.

[0004] However, when selling electricity at negative prices due to oversupply of electricity, the coal-electricity coupled hydrogen production system has the problem of low resource utilization rate, which in turn leads to low economic benefits. Summary of the Invention

[0005] The embodiments of this application provide a coal-electricity coupled hydrogen production system and method in the environment of the electricity spot market, so as to at least solve the problem in the related technology that when selling electricity at negative prices due to oversupply of electricity, the coal-electricity coupled hydrogen production system has low resource utilization rate, which in turn leads to low economic benefits.

[0006] In the first aspect, the embodiments of this application provide a coal-electricity coupled hydrogen production system in the environment of the electricity spot market. The system includes a coal-fired power generation module, an electrolytic water hydrogen production module, a hydrogen storage module, and a gas turbine hydrogen blending module; wherein,

[0007] The coal-fired power generation module is used to determine the load output data of the coal-fired generating unit according to the market price signal and the dispatching instruction, and monitor the load output data in real time;

[0008] The electrolytic water hydrogen production module is connected to the coal-fired power generation module, receives the load output provided by the coal-fired power generation module, and supplies power to the alkaline electrolyzer and proton exchange membrane electrolyzer through power conversion equipment to produce hydrogen;

[0009] The hydrogen storage module is used to receive the hydrogen from the electrolytic water hydrogen production module, purify the hydrogen and store it in the hydrogen storage tank area;

[0010] The gas turbine hydrogen blending module is used to transport the hydrogen to the gas mixing station through a pipeline according to the hydrogen storage inventory of the hydrogen storage module and the gas turbine load demand, and the combined cycle unit with hydrogen blending generates electricity and supplies heat.

[0011] In one embodiment, the system further includes a power distribution control module, wherein:

[0012] The power distribution control module is connected to the coal-fired power generation module, receives price signals and dispatching instructions from the spot market, and distributes the coal-fired power generation load and the water electrolysis hydrogen production cluster load according to the medium- and long-term contract signed electricity of the coal-fired power generation enterprise, the system marginal price, the nodal marginal price, and the market clearing price factors.

[0013] In one embodiment, the input parameters of the power distribution control module include the medium- and long-term contract signed electricity of the coal-fired power generation enterprise, the system marginal price, the nodal marginal price, the market clearing price, and the declared electricity in the power spot trading system, the power system load dispatching and the power flexible load dispatching, the maximum load, the deep regulation load, the power generation cost and the power supply cost of the coal-fired power generation unit, the power of the hydrogen production cluster system, the hydrogen production volume, the hydrogen temperature, pressure, and effective capacity of the hydrogen storage tank, the load rate of the combined cycle unit with hydrogen blending, the natural gas price, and the natural gas flow rate of the gas mixing station.

[0014] In one embodiment, the output parameters of the power distribution control module include the AGC instruction of the coal-fired power generation unit's automatic generation control system, the power distribution strategy of the water electrolysis hydrogen production cluster, the current regulation parameters of the rectifier cabinet, the hydrogen gas path switching instruction of the hydrogen storage tank area, the hydrogen blending ratio of the gas turbine, and the hydrogen flow rate of the gas mixing station.

[0015] In one embodiment, the system further includes a hydrogen comprehensive energy supply module, wherein:

[0016] The hydrogen comprehensive energy supply module is used to control the hydrogen output path of the hydrogen storage module by the power distribution control module when the gas turbine is in a shutdown state, and apply the hydrogen to the hydrogen refueling station, distributed pure hydrogen gas turbine power generation, and combined cooling, heating and power supply.

[0017] In one embodiment, when the coal-fired power generation module determines the load output data of the coal-fired power generation unit according to the market price signal and the dispatching instruction and monitors the load output data in real time, it is used for:

[0018] According to the market price signals and dispatching instructions of the power trading platform, based on the mid- and long-term contracted electricity volume of the coal-fired power generation enterprises, the optimal load output of the coal-fired power generation units is determined, wherein the market price signals include the marginal electricity price, the node marginal electricity price and the market clearing electricity price, and the dispatching instructions include the AGC instructions;

[0019] The load output data of the coal-fired power generation unit is monitored in real time, and the load output data is connected to the power distribution control module for controlling and dynamically adjusting the power generation process.

[0020] In one embodiment, the coal-fired power generation module is used to control and dynamically adjust the power generation process:

[0021] In the case of low or negative electricity prices, the coal-fired power generation module instructs the coal-fired unit to maintain the lowest output state, and at the same time, uses excess electricity to electrolyze water to produce hydrogen;

[0022] When electricity prices are high, the coal-fired power generation module connects electricity to the grid and transmits it to the outside to maximize electricity sales revenue. At the same time, water electrolysis to produce hydrogen maintains the minimum load or hot standby state.

[0023] In one embodiment, the water electrolysis hydrogen production module receives the load output provided by the coal-fired power generation module and supplies power to the alkaline electrolyzer and the proton exchange membrane electrolyzer through the power conversion equipment to prepare hydrogen, and is used to:

[0024] The AC power from the coal-fired power generation module is stepped down and converted into a DC power supply through a rectifier transformer and a rectifier cabinet;

[0025] According to the DC power supply, hydrogen is produced by a mixed networking of an alkaline electrolyzer and a proton exchange membrane electrolyzer, and the power distribution and operation mode of the alkaline electrolyzer and the power distribution and operation mode of the proton exchange membrane electrolyzer are determined by a power distribution control module;

[0026] The working status of the electrolyzer is monitored in real time, and linked with the power distribution control module to dynamically adjust the hydrogen production rate according to the actual power supply situation and market demand.

[0027] In one embodiment, when the hydrogen storage module receives the hydrogen from the water electrolysis hydrogen production module, purifies the hydrogen and stores it in the hydrogen storage tank area, it is used to:

[0028] After receiving the hydrogen from the water electrolysis hydrogen production module, a purification process is performed to remove impurity gases, wherein the purification process includes pressure swing adsorption or membrane separation process; wherein,

[0029] Each of the hydrogen storage tank areas includes a hydrogen compressor, a filling port for long tube trailers, a filling port for solid hydrogen storage and transportation, and a switching port for the external hydrogen transmission pipeline. The hydrogen storage tank area also includes a nitrogen replacement unit, which includes a power distribution control module for accessing parameters such as hydrogen temperature, working pressure, and valve instruments. The power distribution control module will display the hydrogen input, consumption, and inventory in the hydrogen storage tank area in real time.

[0030] In a second aspect, an embodiment of the present application provides a method for coal-electricity coupled hydrogen production in a power spot market environment. The method includes:

[0031] Determine the load output data of the coal-fired power generation unit according to the market price signal and the dispatching instruction, and monitor the load output data in real time;

[0032] Receive the load output of the coal-fired power generation unit, and supply power to the alkaline electrolyzer and the proton exchange membrane electrolyzer through a power conversion device to produce hydrogen.

[0033] In a third aspect, an embodiment of the present application provides a computer device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, it implements a coal-electricity coupled hydrogen production system in a power spot market environment as described in the first aspect above.

[0034] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored. When the program is executed by a processor, it implements a coal-electricity coupled hydrogen production system in a power spot market environment as described in the first aspect above.

[0035] The coal-electricity coupled hydrogen production system and method provided by the embodiments of the present application at least have the following technical effects.

[0036] Through the coal-fired power generation module, which is used to determine the load output data of the coal-fired power generation unit according to the market price signal and the dispatching instruction, and monitor the load output data in real time. The electrolytic water hydrogen production module is connected to the coal-fired power generation module, receives the load output provided by the coal-fired power generation module, and supplies power to the alkaline electrolyzer and the proton exchange membrane electrolyzer through a power conversion device to produce hydrogen. The hydrogen storage module is used to receive the hydrogen from the electrolytic water hydrogen production module, purify the hydrogen, and store it in the hydrogen storage tank area. The gas turbine hydrogen blending module is used to transport the hydrogen to the gas mixing station through a pipeline according to the hydrogen storage inventory in the hydrogen storage module and the gas turbine load demand, and the gas-steam combined cycle unit blends hydrogen for power generation and heating. Improve the energy utilization efficiency of the coal-electricity coupled hydrogen production system, and further improve the economic benefits of the coal-electricity coupled hydrogen production system, and solve the problem that in the related technology, when selling negative electricity prices due to oversupply of electricity, the coal-electricity coupled hydrogen production system has low resource utilization rate and thus low economic benefits.

[0037] Details of one or more embodiments of the present application are set forth in the following drawings and description to make other features, objects, and advantages of the present application more concise and understandable. Description of the Drawings

[0038] The drawings described herein are used to provide a further understanding of the present application and form a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation of the present application. In the drawings:

[0039] Figure 1 is a system structure block diagram of coal-fired power and hydrogen production coupling in a power spot market environment shown according to an exemplary embodiment;

[0040] Figure 2 is a schematic structural diagram of the overall connection of the system shown according to an exemplary embodiment;

[0041] Figure 3 is a flowchart of coal-fired power and hydrogen production coupling in a power spot market environment shown according to an exemplary embodiment;

[0042] Figure 4 is a block diagram of an electronic device shown according to an exemplary embodiment. Detailed Embodiments

[0043] In order to make the purpose, technical solutions, and advantages of the present application clearer and more understandable, the present application will be described and explained below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application. Based on the embodiments provided in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0044] Obviously, the drawings in the following description are only some examples or embodiments of the present application. For those of ordinary skill in the art, without creative efforts, the present application can also be applied to other similar scenarios based on these drawings. In addition, it can also be understood that although the efforts made in such a development process may be complex and lengthy, for those of ordinary skill in the art related to the content disclosed in the present application, some design, manufacturing, or production changes based on the technical content disclosed in the present application are only conventional technical means and should not be understood as insufficient disclosure of the present application.

[0045] References to "embodiments" in this application mean that specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive of other embodiments. It is explicitly and implicitly understood by those of ordinary skill in the art that the embodiments described in this application can be combined with other embodiments without conflict.

[0046] Unless otherwise defined, the technical terms or scientific terms involved in this application shall have the ordinary meanings understood by those with ordinary skills in the technical field to which this application belongs. The words such as "a", "an", "one kind", "the" and the like involved in this application do not indicate a limitation in quantity and can represent a singular or plural number. The terms "include", "comprise", "have" and any variations thereof involved in this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or modules (units) is not limited to the listed steps or units, but may further include unlisted steps or units, or may further include other steps or units inherent to these processes, methods, products or devices. The words such as "connect", "be connected", "couple" and the like involved in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The "multiple" involved in this application means two or more. "And / or" describes the association relationship of associated objects and indicates that three relationships may exist. For example, "A and / or B" may represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after. The terms "first", "second", "third", etc. involved in this application are only used to distinguish similar objects and do not represent a specific order for the objects.

[0047] The functional positioning of traditional coal-fired power will gradually shift to mainly serve as emergency backup power, peak shaving power, and power grid supply support power. Flexibility indicators such as the peak shaving range, ramp rate, and start-stop time of thermal power units will become the key factors determining the competitiveness of thermal power, and the peak shaving range will be the main core goal of the flexibility transformation of thermal power. Currently, the flexibility transformation of coal-fired power mainly focuses on modifying the boilers and turbine bodies of the units and adding thermoelectric decoupling devices such as electric boilers and heat storage tanks to improve the peak shaving capacity of the units, but there are problems such as increased coal consumption per unit of electricity, deteriorated combustion stability, and slow response speed.

[0048] Compared with traditional coal-fired power, gas-fired power has the advantages of fast start and stop and strong peak regulation. It has unlimited amplitude in the primary frequency regulation of the power grid, basically does not generate grid-connected harmonics, suppresses subsynchronous oscillations, and has superior performance. However, the fuel cost of gas-fired power is much higher than that of coal-fired power. Therefore, gas-fired power is currently mainly a regulating power source, and its fuel natural gas is still a carbon-containing energy, and still faces the problem of clean substitution.

[0049] As a zero-carbon energy, hydrogen energy has the dual properties of clean fuel and energy storage medium. It can be converted into electric energy to achieve a balance between power generation and electricity consumption in time and space. On the one hand, hydrogen can be produced by using the electricity produced during the period of negative electricity price or valley electricity price of coal-fired power generators. The deep peak-shaving capacity of coal-fired power generators can be improved without changing the unit itself. There will be no problems of increased coal consumption and poor combustion stability at low loads. On the other hand, the produced hydrogen can be sent to gas turbines for power generation during the peak electricity price period, which can reduce both natural gas consumption and carbon emissions of gas-fired power generators.

[0050] However, when electricity is oversupplied and sold at a negative price, the coal-electricity coupled hydrogen production system has a low resource utilization rate, which leads to low economic benefits. Therefore, the present application provides a system and method for coal-electricity coupled hydrogen production in an electricity spot market environment, which has solved the above problems.

[0051] In a first aspect, an embodiment of the present application provides a system for coal-electricity coupled hydrogen production in an electricity spot market environment. Figure 1 It is a block diagram of a coal-electricity coupled hydrogen production system in an electricity spot market environment according to an exemplary embodiment. Figure 2 is a schematic diagram showing the overall connection structure of the system according to an exemplary embodiment. Figure 1 and Figure 2 As shown, the system includes a coal-fired power generation module 110, a water electrolysis hydrogen production module 120, a hydrogen storage module 130 and a gas turbine hydrogen blending module 140; wherein,

[0052] The coal-fired power generation module 110 is used to determine the load output data of the coal-fired power generation unit according to the market price signal and the dispatching instruction, and monitor the load output data in real time;

[0053] The water electrolysis hydrogen production module 120 is connected to the coal-fired power generation module, receives the load output provided by the coal-fired power generation module, and supplies power to the alkaline electrolyzer and the proton exchange membrane electrolyzer through the power conversion equipment to produce hydrogen;

[0054] The hydrogen storage module 130 is used to receive the hydrogen from the water electrolysis hydrogen production module, purify the hydrogen and store it in the hydrogen storage tank area;

[0055] The gas turbine hydrogen blending module 140 is used to transport hydrogen to the gas mixing station through a pipeline according to the hydrogen storage capacity of the hydrogen storage module and the gas turbine load demand, and the gas-steam combined cycle unit blends hydrogen to generate electricity and heat.

[0056] In summary, a coal-fired power and hydrogen production coupling system in a spot power market environment provided by an embodiment of the present application includes a coal-fired power generation module for determining the load output data of a coal-fired power generation unit according to market price signals and dispatching instructions and monitoring the load output data in real time. An electrolytic water hydrogen production module is connected to the coal-fired power generation module, receives the load output provided by the coal-fired power generation module, and supplies power to an alkaline electrolytic cell and a proton exchange membrane electrolytic cell through a power conversion device to produce hydrogen. A hydrogen storage module is used to receive the hydrogen from the electrolytic water hydrogen production module, purify the hydrogen, and store it in a hydrogen storage tank area. A gas turbine hydrogen blending module is used to transport hydrogen to a gas mixing station through a pipeline according to the hydrogen storage inventory of the hydrogen storage module and the gas turbine load demand, and the gas-steam combined cycle unit blends hydrogen for power generation and heating. The energy utilization efficiency of the coal-fired power and hydrogen production coupling system is improved, and further the economic benefits of the coal-fired power and hydrogen production coupling system are improved, solving the problem in related technologies that when selling negative electricity prices due to oversupply of electricity, the coal-fired power and hydrogen production coupling system has low resource utilization rate and thus low economic benefits.

[0057] In one embodiment, when the coal-fired power generation module determines the load output data of the coal-fired power generation unit according to market price signals and dispatching instructions and monitors the load output data in real time, it is used for:

[0058] Optionally, receive market price signals and dispatching instructions. The market price signals include system marginal price, nodal marginal price, and market clearing price. The dispatching instructions include automatic generation control (AGC) instructions, etc., issued by the grid dispatching center. Comprehensively analyze and determine the optimal load output. According to the received market price signals and dispatching instructions, combined with the medium- and long-term contract signed electricity of the coal-fired power generation enterprise, the coal-fired power generation module conducts comprehensive analysis to determine the optimal load output of the coal-fired power generation unit. The following factors are considered in this process:

[0059] Market price signals: Evaluate the supply and demand situation and price level in the current power market to decide whether to increase or decrease power generation.

[0060] Dispatching instructions: Follow the AGC instructions to adjust the output power of the generator set, ensure the stability of the grid frequency, and enable the generator set to quickly respond to load changes.

[0061] Medium- and long-term contract signed electricity: Based on the contract electricity signed with the power purchaser, ensure to meet the basic power supply obligation.

[0062] Monitor the load output data in real time. The coal-fired power generation module monitors the load output data of the coal-fired power generation unit in real time and transmits this data to the power distribution control module. The power distribution control module dynamically adjusts the power generation strategy according to the real-time data to ensure the precise control and flexibility of the power generation process.

[0063] In one embodiment, when the coal-fired power generation module controls and dynamically adjusts the power generation process, it is used for:

[0064] In the case of low electricity prices or negative electricity prices, the coal-fired power generation module instructs the coal-fired power unit to maintain the minimum output state. At the same time, the excess power is used for electrolytic water hydrogen production;

[0065] In the case of high electricity price periods, the coal-fired power generation module sends the power to the grid for external transmission to maximize the electricity sales revenue. At the same time, the electrolytic water hydrogen production maintains the minimum load or the hot standby state.

[0066] Optionally, to control and dynamically adjust the power generation process: The power distribution control module uses the received load output data to control and dynamically adjust the power generation process to ensure the response speed and accuracy. In the case of low electricity prices or negative electricity prices, the coal-fired power unit maintains the minimum output state, and the excess power is used to drive the electrolytic water hydrogen production system; during high electricity price periods, the coal-fired power unit gives priority to generating electricity and sending it to the grid for external transmission, and the hydrogen production system maintains the minimum load or enters the hot standby state.

[0067] It should be noted that the coal-fired power generation module also includes the function of adjusting the operating parameters of the boiler and steam turbine to adapt to different market conditions and dispatching instruction requirements, ensuring that the unit can operate safely and efficiently under various conditions.

[0068] The coal-fired power generation module determines the optimal load output by comprehensively analyzing the market price signal and dispatching instructions, avoiding unnecessary power waste and equipment losses, and improving the resource utilization rate. The coal-fired power generation module flexibly adjusts the power generation and hydrogen production strategies under different electricity price conditions to maximize the electricity sales revenue, reduce the operating cost, and improve the overall economic benefit. Using the excess power for hydrogen production during low electricity price or negative electricity price periods reduces the phenomenon of abandoned electricity, promotes the development of clean energy, and helps to achieve the low-carbon transformation of the energy structure. The real-time monitoring and dynamic adjustment mechanism enables the system to respond to market changes in a short time, maintain the flexibility and stability of operation, and adapt to the complex environment of the electricity spot market.

[0069] In one embodiment, when the electrolytic water hydrogen production module receives the load output provided by the coal-fired power generation module and supplies power to the alkaline electrolyzer and proton exchange membrane electrolyzer through the power conversion equipment to produce hydrogen, it is used for:

[0070] Step down and convert the AC power from the coal-fired power generation module into DC power through the rectifier transformer and rectifier cabinet;

[0071] According to the DC power, adopt the method of hybrid networking of alkaline electrolyzers and proton exchange membrane electrolyzers for hydrogen production, and determine the power distribution and operating mode of the alkaline electrolyzer and the power distribution and operating mode of the proton exchange membrane electrolyzer through the power distribution control module;

[0072] Monitor the working status of the electrolyzer in real time and work in conjunction with the power distribution control module to dynamically adjust the hydrogen production rate based on actual power supply conditions and market demand.

[0073] Optionally, the rectifier transformer steps down the AC power from the coal-fired power generation module. The rectifier cabinet converts the stepped-down AC power into a DC power supply to ensure stable and high-quality power supply to the electrolyzer. Hydrogen production is carried out by a hybrid networking of alkaline electrolyzer (ALK) and proton exchange membrane electrolyzer (PEM). The power distribution control module automatically determines the power distribution and operation mode of the two electrolyzers according to the actual power supply and market demand. The alkaline electrolyzer (ALK) is suitable for large-scale and stable hydrogen production needs and has a low initial investment cost. The proton exchange membrane electrolyzer (PEM) has the advantages of rapid load increase and decrease, and can quickly respond to fluctuations in the power market, and is particularly suitable for flexible hydrogen production needs in the power spot market environment. Real-time monitoring of the working status of the electrolyzer (such as current density, temperature and other parameters) and linkage with the power distribution control module. Dynamic adjustment, automatically adjust the hydrogen production rate according to real-time data to ensure the efficiency and flexibility of the hydrogen production process. Especially in the power spot market environment, when the electricity price changes sharply, it can switch to the most economical hydrogen production mode in time to maximize resource utilization efficiency. Optimize the operating mode. The power distribution control module dynamically adjusts the operating modes of the two electrolyzers according to the actual power supply situation and market demand, ensuring that the system can achieve the best hydrogen production efficiency and economic benefits under different operating conditions.

[0074] The water electrolysis hydrogen production module ensures efficient conversion from AC to DC through rectifier transformers and rectifier cabinets, improves electrolysis efficiency and hydrogen production, and reduces energy loss. The hybrid networking of alkaline electrolyzer (ALK) and proton exchange membrane electrolyzer (PEM) fully utilizes the technical advantages of the two electrolyzers, enhances the adaptability and flexibility of the system, and is particularly suitable for coping with the volatility of the electricity spot market. The power distribution control module intelligently adjusts the power distribution and operation mode of the two electrolyzers to ensure the optimal hydrogen production efficiency under different working conditions, maximize economic benefits and reduce operating costs.

[0075] In one embodiment, when the hydrogen storage module receives hydrogen from the water electrolysis hydrogen production module, purifies the hydrogen and stores it in the hydrogen storage tank area, it is used to:

[0076] After receiving the hydrogen from the water electrolysis hydrogen production module, a purification process is performed to remove impurity gases, wherein the purification process includes pressure swing adsorption or membrane separation process; wherein,

[0077] Each hydrogen storage tank area includes a hydrogen compressor, a filling port for tube trailers, a filling port for solid-state hydrogen storage and transportation, and a switching port for the external hydrogen pipeline. The hydrogen storage tank area also includes a nitrogen replacement unit, which includes a power distribution control module for accessing parameters such as hydrogen temperature, working pressure, and valve instrumentation. The power distribution control module will display the hydrogen input, consumption, and inventory in the hydrogen storage tank area in real time.

[0078] Optionally, the hydrogen storage module receives the generated hydrogen from the electrolytic water hydrogen production module through a pipeline. The newly received hydrogen is preliminarily filtered to remove large particle impurities and moisture to ensure the safety and efficiency of subsequent processing. High-efficiency purification technologies, such as pressure swing adsorption (PSA) or membrane separation technology, are used to remove trace impurity gases (such as oxygen, nitrogen, and other possible impurities) in the hydrogen to ensure that the purity of the output hydrogen reaches industrial standards or higher requirements. According to actual needs, a multi-stage purification device can be set up to further improve the purity of hydrogen to meet the requirements of different application scenarios. The hydrogen storage tank area is equipped with multiple hydrogen storage tanks, and each hydrogen storage tank is provided with an independent safety monitoring unit, including temperature and pressure sensors and an emergency pressure relief device, to ensure the safety of hydrogen storage. It supports multiple storage methods, such as high-pressure gaseous storage, cryogenic liquid storage, and solid hydrogen storage material storage, to adapt to different application scenarios and transportation needs. Key parameters such as the hydrogen temperature, working pressure, and valve status in the hydrogen storage tank area are connected to the power distribution control module to achieve real-time monitoring and management. Adjust the hydrogen storage volume according to the demand to ensure the safe operation and efficient utilization of the hydrogen storage tank area. It can display the hydrogen input, consumption, and inventory in the hydrogen storage tank area in real time, and issue early warnings or adjustment instructions as needed to prevent potential safety hazards. The hydrogen storage tank area is equipped with a filling port for tube trailers, a filling port for solid-state hydrogen storage and transportation, and a switching port for the external hydrogen pipeline, ensuring that hydrogen can be flexibly transported to downstream application links through multiple channels, such as the hydrogen-doped module of the gas turbine, hydrogen supply for hydrogen refueling stations, and distributed power generation. Nitrogen is used for replacement before and after hydrogen filling to prevent air from entering the hydrogen storage tank, ensure the purity and safety of the hydrogen storage environment, and avoid potential explosion risks.

[0079] The hydrogen storage module of the hydrogen storage tank area is equipped with a perfect safety monitoring and protection mechanism, including temperature and pressure sensors and an emergency pressure relief device, ensuring the safety and reliability of hydrogen storage and preventing accidents. It supports multiple storage methods, enhancing the flexibility and application scope of the system, adapting to different application scenarios and transportation needs, and improving resource utilization efficiency. Multiple transportation channels enable hydrogen to be flexibly transported to different application terminals, enhancing the adaptability and economic benefits of the system and supporting diversified hydrogen energy applications.

[0080] In one embodiment, the hydrogen-doped module of the gas turbine is used to transport hydrogen through a pipeline to the gas mixing station according to the hydrogen storage inventory of the hydrogen storage module and the load demand of the gas turbine, for hydrogen-doped power generation and heat supply of the combined cycle unit of gas and steam.

[0081] Optionally, the hydrogen blending module of the gas turbine receives the hydrogen storage inventory data from the hydrogen storage module in real time. Combining the current power grid dispatching instructions, market electricity price signals, and the actual operating status of the gas turbine, it evaluates the load demand of the gas turbine. The power distribution control module calculates the optimal hydrogen blending ratio through an intelligent algorithm based on the hydrogen storage inventory and the gas turbine load demand. Considering the natural gas price and the natural gas flow rate at the gas mixing station comprehensively, it dynamically optimizes the hydrogen blending ratio to achieve the economically optimal hydrogen blending power generation strategy, reduce the fuel cost, and reduce carbon emissions. The hydrogen in the hydrogen storage module is transported to the gas mixing station through a dedicated pipeline to ensure the safe transportation of hydrogen. The mixed hydrogen-natural gas is sent into the combined cycle unit for hydrogen blending combustion, which is used for power generation and heat supply. The combined cycle unit can efficiently convert chemical energy into electrical energy and heat energy, improve the overall efficiency of the system, enhance the power grid peak shaving capacity, and achieve flexible power supply and heat energy utilization.

[0082] The hydrogen blending module of the gas turbine ensures the best hydrogen blending power generation strategy under different operating conditions by calculating the optimal hydrogen blending ratio, improving the resource utilization rate and reducing the operating cost. By combining the natural gas price and the natural gas flow rate at the gas mixing station, it dynamically optimizes the hydrogen blending ratio, reduces the natural gas consumption, lowers the fuel cost, and at the same time reduces carbon emissions and improves the energy utilization rate.

[0083] In one embodiment, the system further includes a power distribution control module, where:

[0084] The power distribution control module is connected to the coal-fired power generation module, receives the price signals and dispatching instructions from the spot market, and distributes the coal-fired power generation load and the load of the water electrolysis hydrogen production cluster according to the medium- and long-term contract signed electricity of the coal-fired power generation enterprise, the system marginal electricity price, the nodal marginal electricity price, and the market clearing electricity price factors.

[0085] The input parameters of the power distribution control module include the medium- and long-term contract signed electricity of the coal-fired power generation enterprise, the system marginal electricity price, the nodal marginal electricity price, the market clearing electricity price, the declared electricity volume in the power spot trading system, the power system load dispatching and the flexible power load dispatching, the maximum load, the deep regulation load, the power generation cost and the power supply cost of the coal-fired power generation unit, the power of the hydrogen production cluster system, the hydrogen production volume, the hydrogen temperature, pressure, and effective capacity of the hydrogen storage tank, the load rate of the combined cycle unit, the natural gas price, and the natural gas flow rate at the gas mixing station.

[0086] The output parameters of the power distribution control module include the automatic generation control (AGC) instruction of the coal-fired power generation unit, the power distribution strategy of the water electrolysis hydrogen production cluster, the current regulation parameters of the rectifier cabinet, the hydrogen gas path switching instruction of the hydrogen storage tank area, the hydrogen blending ratio of the gas turbine, and the hydrogen flow rate at the gas mixing station.

[0087] Through multi-factor comprehensive analysis and intelligent algorithm optimization, the power distribution control module ensures the optimal load distribution of coal-fired power generation units and water electrolysis hydrogen production clusters, improves resource utilization efficiency, and reduces operating costs. By integrating market price signals and dispatching instructions, it dynamically adjusts power generation and hydrogen production strategies to maximize electricity sales revenue, reduce fuel consumption and carbon emissions, and enhance overall economic benefits.

[0088] In one embodiment, the system further includes a hydrogen comprehensive energy supply module, where:

[0089] The hydrogen comprehensive energy supply module is used to control the hydrogen output path of the hydrogen storage module when the gas turbine is in a shutdown state, and apply hydrogen to hydrogen refueling stations, distributed pure hydrogen gas turbine power generation, and combined cooling, heat, and power supply.

[0090] Optionally, the hydrogen comprehensive energy supply module monitors the working state of the gas turbine in real time. When it detects that the gas turbine is in a shutdown state, it immediately notifies the power distribution control module. The power distribution control module automatically issues instructions to adjust the hydrogen output path of the hydrogen storage module according to the current market demand and hydrogen storage situation. Hydrogen is transported from the hydrogen storage tank area to the hydrogen refueling station through a dedicated pipeline to ensure the safe transportation and efficient supply of hydrogen. The hydrogen refueling station is equipped with an intelligent management system to monitor the hydrogen flow rate and pressure in real time, ensuring the safety and reliability of the hydrogen refueling process and meeting the needs of transportation vehicles such as fuel cell vehicles. Hydrogen is transported from the hydrogen storage tank area to the distributed pure hydrogen gas turbine for on-site power generation. The distributed pure hydrogen gas turbine adopts efficient combustion technology to convert hydrogen into electrical energy and provide stable power supply, which is especially suitable for remote areas or emergency power supply needs. Hydrogen is transported from the hydrogen storage tank area to the combined cooling, heat, and power supply system to recover waste heat while generating electricity and provide hot water or refrigeration services. The combined cooling, heat, and power supply system integrates an intelligent control system to optimize the hydrogen utilization efficiency, maximize the energy utilization efficiency, support zero-carbon construction, achieve combined cooling, heat, and power supply, and improve the overall energy efficiency. The hydrogen comprehensive energy supply module monitors the key parameters (such as hydrogen flow rate, temperature, pressure, etc.) of each application link in real time and is linked with the power distribution control module to ensure the stable operation of the system. It automatically adjusts the hydrogen output path according to real-time data to respond to market changes and load fluctuations in a timely manner, preventing economic losses or equipment damage caused by supply-demand imbalance.

[0091] The multiple application ways of the hydrogen comprehensive energy supply module not only increase the added value of hydrogen energy, but also reduce resource waste and enhance overall economic benefits. By efficiently utilizing hydrogen energy, the use of traditional fossil fuels is reduced, carbon emissions are lowered, green energy transformation is supported, and it helps to achieve the low-carbon transformation of the energy structure. When the gas turbine is shut down, hydrogen can be fully utilized through multiple ways, including hydrogen supply to hydrogen refueling stations, distributed pure hydrogen gas turbine power generation, and combined cooling, heat, and power supply, expanding the application scenarios of hydrogen energy and improving energy utilization efficiency.

[0092] In one embodiment, in a coal-electricity coupled hydrogen production system, the coal-fired power generation module determines the load output of the coal-fired power generation unit according to the market price signal and the dispatching instruction, and monitors the load data in real time, and these data are transmitted to the power distribution control module. The power distribution control module receives the price signal and the dispatching instruction from the spot market, combines various input parameters (such as the electricity quantity signed in the medium- and long-term contract, the marginal electricity price, etc.), and intelligently distributes the coal-fired power generation load and the water electrolysis hydrogen production cluster load. The water electrolysis hydrogen production module receives the power provided by the coal-fired power generation module, and supplies power to the alkaline electrolyzer and the proton exchange membrane electrolyzer through the power conversion equipment for efficient hydrogen production. The generated hydrogen is transported to the hydrogen storage module, which purifies and stores the hydrogen, and adjusts the hydrogen output path according to the demand at the same time. The gas turbine hydrogen blending module transports the hydrogen to the gas mixing station through the pipeline according to the hydrogen storage inventory in the hydrogen storage module and the gas turbine load demand, for hydrogen blending power generation and heat supply of the combined cycle unit. Finally, when the gas turbine shuts down, the hydrogen comprehensive energy supply module, under the command of the power distribution control module, applies the hydrogen in the hydrogen storage module to various ways such as hydrogen supply for the hydrogen refueling station, distributed pure hydrogen gas turbine power generation, and combined cooling, heat and power supply, to ensure the effective utilization of hydrogen energy.

[0093] In summary, a coal-electricity coupled hydrogen production system in an electricity spot market environment provided by the embodiment of the present application can balance the operating pressure brought by electricity spot market transactions to traditional coal-electricity enterprises under the current situation, meet the frequent, fast, and deep peak shaving requirements of the power grid for thermal power enterprises in the future, carry out coal-electricity power for hydrogen production during the negative electricity price time or valley electricity period in the electricity spot trading market, use the produced hydrogen for gas turbine hydrogen blending power generation or sell it to the hydrogen refueling station, strengthen the coordinated interaction among all links of the source, grid, load, and storage, fully tap the flexibility regulation ability of the system and the demand-side resources, so as to solve the problems of the deep peak shaving demand of the power grid for coal-fired power units and the limited application scenarios of hydrogen energy, increase the local power support, mobilize the load response ability, and realize the flexible, strong and local development of traditional coal-fired power enterprises.

[0094] A coal-fired power generation module is used to determine the load output data of the coal-fired power generation unit according to the market price signal and the dispatching instruction, and monitor the load output data in real time. A water electrolysis hydrogen production module is connected to the coal-fired power generation module, receives the load output provided by the coal-fired power generation module, and supplies power to the alkaline electrolyzer and the proton exchange membrane electrolyzer through the power conversion equipment to prepare hydrogen. A hydrogen storage module is used to receive the hydrogen from the water electrolysis hydrogen production module, purify and store the hydrogen in the hydrogen storage tank area. A gas turbine hydrogen blending module is used to transport the hydrogen to the gas mixing station through the pipeline according to the hydrogen storage inventory in the hydrogen storage module and the gas turbine load demand, for hydrogen blending power generation and heat supply of the combined cycle unit. The energy utilization efficiency of the coal-electricity coupled hydrogen production system is improved, and further the economic benefit of the coal-electricity coupled hydrogen production system is improved, and the problem that in the related technology, when selling negative electricity prices during the oversupply of electricity, the coal-electricity coupled hydrogen production system has low resource utilization rate and thus low economic benefit is solved.

[0095] In a second aspect, an embodiment of the present application provides a method for coal-electricity coupled hydrogen production in an electricity spot market environment. Figure 3 It is a flowchart of coal-electricity coupled hydrogen production in an electricity spot market environment, as Figure 3 shown, applied to the above-mentioned coal-electricity coupled hydrogen production system in an electricity spot market environment. A method for coal-electricity coupled hydrogen production in an electricity spot market environment includes:

[0096] Step S101: Determine the load output data of the coal-fired power generation unit according to the market price signal and the dispatching instruction, and monitor the load output data in real time.

[0097] Step S102: Receive the load output of the coal-fired power generation unit, and supply power to the alkaline electrolyzer and the proton exchange membrane electrolyzer through the power conversion device to produce hydrogen.

[0098] In summary, the method for coal-electricity coupled hydrogen production in an electricity spot market environment provided by the present application. By determining the load output data of the coal-fired power generation unit according to the market price signal and the dispatching instruction, and monitoring the load output data in real time. Receive the load output of the coal-fired power generation unit, and supply power to the alkaline electrolyzer and the proton exchange membrane electrolyzer through the power conversion device to produce hydrogen. Solve the problem that in the related technology, when selling negative electricity prices due to oversupply of electricity, the coal-electricity coupled hydrogen production system has low resource utilization rate, which in turn leads to low economic benefits.

[0099] It should be noted that the coal-electricity coupled hydrogen production system in an electricity spot market environment provided in this embodiment is used to implement the above-mentioned implementation manners, and those that have been described will not be repeated. As used above, terms such as "module", "unit", "sub-unit", etc. can be a combination of software and / or hardware that can achieve a predetermined function. Although the devices described in the above embodiments are preferably implemented in software, implementation in hardware, or a combination of software and hardware is also possible and contemplated.

[0100] In a third aspect, an embodiment of the present application provides an electronic device. Figure 4 It is a block diagram of an electronic device shown according to an exemplary embodiment. As Figure 4 shown, the electronic device may include a processor 41 and a memory 42 storing computer program instructions.

[0101] Specifically, the above-mentioned processor 41 may include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application.

[0102] Among them, the memory 42 may include a mass memory for data or instructions. By way of example and not limitation, the memory 42 may include a hard disk drive (HDD), a floppy disk drive, a solid state drive (SSD), a flash memory, an optical disc, a magneto-optical disc, a magnetic tape, or a universal serial bus (USB) drive, or a combination of two or more of these. In a suitable case, the memory 42 may include a removable or non-removable (or fixed) medium. In a suitable case, the memory 42 may be inside or outside the data processing device. In a specific embodiment, the memory 42 is a non-volatile memory. In a specific embodiment, the memory 42 includes a read-only memory (ROM) and a random access memory (RAM). In a suitable case, the ROM may be a mask-programmed ROM, a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), an electrically alterable ROM (EAROM), or a flash memory (FLASH), or a combination of two or more of these. In a suitable case, the RAM may be a static random access memory (SRAM) or a dynamic random access memory (DRAM), where the DRAM may be a fast page mode dynamic random access memory (FPMDRAM), an extended date out dynamic random access memory (EDODRAM), a synchronous dynamic random access memory (SDRAM), etc.

[0103] The memory 42 can be used to store or cache various data files required for processing and / or communication, as well as possible computer program instructions executed by the processor 41.

[0104] By reading and executing the computer program instructions stored in the memory 42, the processor 41 implements any one of the coal-electricity coupled hydrogen production methods in the electricity spot market environment in the above embodiments.

[0105] In one embodiment, a device for coal-electricity coupled hydrogen production in an electricity spot market environment may further include a communication interface 44 and a bus 40. Among them, as Figure 4 shown, the processor 41, the memory 42, and the communication interface 44 are connected through the bus 40 to complete communication with each other.

[0106] The communication interface 44 is used to implement communication between the various modules, devices, units, and / or devices in the embodiments of the present application. The communication port 44 can also implement data communication with other components such as external devices, image / data acquisition devices, databases, external storage, and image / data processing workstations.

[0107] The bus 40 includes hardware, software, or both, and couples components of a device for coal-electricity coupled hydrogen production in a spot electricity market environment to each other. The bus 40 includes, but is not limited to, at least one of the following: Data Bus, Address Bus, Control Bus, Expansion Bus, Local Bus. By way of example and not limitation, the bus 40 may include an Accelerated Graphics Port (AGP) or other graphics bus, an Extended Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), a HyperTransport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an InfiniBand interconnect, a Low Pin Count (LPC) bus, a memory bus, a Micro Channel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a Video Electronics Standards Association Local Bus (VLB) bus, or other suitable buses, or a combination of two or more of these. Where appropriate, the bus 40 may include one or more buses. Although the embodiments of the present application describe and illustrate specific buses, the present application contemplates any suitable bus or interconnect.

[0108] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which a program is stored, and when the program is executed by a processor, it implements a method for coal-electricity coupled hydrogen production in a spot electricity market environment provided in the first aspect.

[0109] Among them, the more specific forms that the readable storage medium may adopt may include, but are not limited to: portable disks, hard disks, random access memories, read-only memories, erasable programmable read-only memories, optical storage devices, magnetic storage devices, or any suitable combination of the above.

[0110] In a possible implementation manner, the present invention can also be implemented in the form of a program product, which includes program code. When the program product runs on a terminal device, the program code is used to cause the terminal device to execute the steps of implementing a method for coupling coal power and hydrogen production in a spot power market environment provided in the first aspect.

[0111] Among them, the program code for executing the present invention can be written in any combination of one or more programming languages. The program code can be executed entirely on the user device, partially on the user device, executed as an independent software package, partially on the user device and partially on a remote device, or entirely on a remote device.

[0112] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0113] The above embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A coal-electricity coupled hydrogen production system in an electricity spot market environment, characterized in that: The system includes a coal-fired power generation module, a water electrolysis hydrogen production module, a hydrogen storage module and a gas turbine hydrogen blending module; wherein, The coal-fired power generation module is used to determine the load output data of the coal-fired power generation unit according to the market price signal and the dispatching instruction, and monitor the load output data in real time; The water electrolysis hydrogen production module is connected to the coal-fired power generation module, receives the load output provided by the coal-fired power generation module, and supplies power to the alkaline electrolyzer and the proton exchange membrane electrolyzer through the power conversion equipment to prepare hydrogen; The hydrogen storage module is used to receive the hydrogen from the water electrolysis hydrogen production module, purify the hydrogen and store it in the hydrogen storage tank area; The gas turbine hydrogen blending module is used to transport the hydrogen to the gas mixing station through a pipeline according to the hydrogen storage capacity of the hydrogen storage module and the gas turbine load demand, and the gas-steam combined cycle unit blends hydrogen to generate electricity and heat.

2. The system according to claim 1, characterized in that The coal-fired power generation module determines the load output data of the coal-fired power generation unit according to the market price signal and the dispatching instruction, and monitors the load output data in real time, and is used to: According to the market price signals and dispatching instructions of the power trading platform, based on the mid- and long-term contracted electricity volume of the coal-fired power generation enterprises, the optimal load output of the coal-fired power generation units is determined, wherein the market price signals include the marginal electricity price, the node marginal electricity price and the market clearing electricity price, and the dispatching instructions include the AGC instructions; The load output data of the coal-fired power generation unit is monitored in real time, and the load output data is connected to the power distribution control module for controlling and dynamically adjusting the power generation process.

3. The system according to claim 2, characterized in that The coal-fired power generation module is used to control and dynamically adjust the power generation process: In the case of low or negative electricity prices, the coal-fired power generation module instructs the coal-fired unit to maintain the lowest output state, and at the same time, uses excess electricity to electrolyze water to produce hydrogen; When electricity prices are high, the coal-fired power generation module connects electricity to the grid and transmits it to the outside to maximize electricity sales revenue. At the same time, water electrolysis to produce hydrogen maintains the minimum load or hot standby state.

4. The system according to claim 1, characterized in that The water electrolysis hydrogen production module receives the load output provided by the coal-fired power generation module and supplies power to the alkaline electrolyzer and the proton exchange membrane electrolyzer through the power conversion equipment to prepare hydrogen, and is used to: The AC power from the coal-fired power generation module is stepped down and converted into a DC power supply through a rectifier transformer and a rectifier cabinet; According to the DC power supply, hydrogen is produced by a mixed networking of an alkaline electrolyzer and a proton exchange membrane electrolyzer, and the power distribution and operation mode of the alkaline electrolyzer and the power distribution and operation mode of the proton exchange membrane electrolyzer are determined by a power distribution control module; The working status of the electrolyzer is monitored in real time, and linked with the power distribution control module to dynamically adjust the hydrogen production rate according to the actual power supply situation and market demand.

5. The system according to claim 1, characterized in that When the hydrogen storage module receives the hydrogen from the water electrolysis hydrogen production module, purifies the hydrogen and stores it in the hydrogen storage tank area, it is used to: After receiving the hydrogen from the water electrolysis hydrogen production module, a purification process is performed to remove impurity gases, wherein the purification process includes pressure swing adsorption or membrane separation process; wherein, Each of the hydrogen storage tank areas includes a hydrogen compressor, a long tube trailer filling port, a solid-state hydrogen storage and transportation filling port, and a switching port for external hydrogen transmission pipelines. The hydrogen storage tank area also includes a nitrogen replacement unit, including hydrogen temperature, working pressure, and valve instrument parameters connected to the power distribution control module. The power distribution control module will display the hydrogen intake and consumption inventory of the hydrogen storage tank area in real time.

6. The system according to claim 1, characterized in that The system also includes a power distribution control module, wherein: The power allocation control module is connected to the coal-fired power generation module, receives price signals and dispatch instructions from the spot market, and allocates coal-fired power generation load and water electrolysis hydrogen production cluster load based on the medium- and long-term contracted electricity volume of coal-fired power generation enterprises, system marginal electricity prices, node marginal electricity prices, and market clearing electricity price factors.

7. The system according to claim 6, characterized in that The input parameters of the power distribution control module include the power volume signed under medium- and long-term contracts of coal-fired power generation enterprises, the system marginal electricity price, node marginal electricity price, market clearing electricity price, declared power volume in the electricity spot trading system, power system load dispatching and power flexible load dispatching, maximum load, deep adjustment load, power generation cost and power supply cost of coal-fired power generating units, power and hydrogen production of hydrogen production cluster system, hydrogen temperature, pressure and effective capacity of hydrogen storage tanks, load rate of combined cycle units, natural gas price and natural gas flow rate of mixing stations.

8. The system according to claim 7, characterized in that The output parameters of the power distribution control module include the AGC instructions of the automatic power generation control system of the coal-fired generator set, the power distribution strategy of the water electrolysis hydrogen production cluster, the current adjustment parameters of the rectifier cabinet, the hydrogen gas line switching instructions of the hydrogen storage tank area, the hydrogen blending ratio of the gas turbine, and the hydrogen flow rate of the mixing station.

9. The system according to claim 6, characterized in that The system also includes a hydrogen comprehensive energy supply module, wherein: The hydrogen comprehensive energy supply module is used when the gas engine is in a shutdown state. The power distribution control module controls the hydrogen output path of the hydrogen storage module, and applies the hydrogen to hydrogen refueling stations, distributed pure hydrogen gas engine power generation and combined heat and power supply.

10. A coal-electricity coupled hydrogen production method in an electricity spot market environment, characterized in that: The method is applied to the system according to any one of claims 1 to 9, and the method comprises: Determine the load output data of the coal-fired power generation unit according to market price signals and dispatch instructions, and monitor the load output data in real time; The load output of the coal-fired power generation unit is received, and power is supplied to the alkaline electrolyzer and the proton exchange membrane electrolyzer through the power conversion equipment to prepare hydrogen.

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