Power grid regulation and control system and method based on hydrogen energy storage

Abstract

The invention discloses a power grid regulation and control system and method based on hydrogen energy storage. The system comprises an electrolytic hydrogen production device, a photovoltaic power generation device, a hydrogen compression device, a hydrogen storage tank, a hydrogen fuel power generation device, a battery energy storage device and a central controller. The method comprises the following steps of obtaining current power supply power and historical power supply data of a power grid system, calculating corresponding regulation and control parameters, and performing power regulation and control on the power grid system by using energy supply equipment and energy storage equipment according to the current power supply power and the regulation and control parameters; the regulation and control parameters comprise an energy supply power threshold value and an energy storage power threshold value. The problems that the power supply power of an existing power grid system cannot be matched with the power utilization demand of a user in real time, and power grid regulation and control are not accurate and stable enough are solved, the current power supply power and the historical power supply data of the power grid system are obtained, the corresponding regulation and control parameters are calculated, and multi-stage precise regulation and control of the power of the power grid system are achieved; and the high matching between the power supply capability of the power grid and the power demand and the continuous stability of the system are ensured.

Description

Technical Field

[0001] The present invention relates to the field of energy technology, and in particular to a power grid control system and method based on hydrogen energy storage. Background Art

[0002] In order to ensure the normal progress of production and life, power supply engineering is an inevitable and important project. The intensity of electricity consumption in production and life will fluctuate periodically over time, resulting in peak and trough electricity consumption, which leads to a mismatch between users' electricity demand and the power supply capacity of the power grid system at some times. Therefore, certain measures need to be taken to carry out peak control to ensure a stable power supply effect.

[0003] At present, the common method of peak-shaving power supply to the power grid is to integrate additional power sources into the power grid during the peak period of electricity consumption, including wind power, photovoltaic and other power generation devices, and the peak-shaving method of hydrogen energy storage is an important choice due to its green and environmentally friendly characteristics. However, the technical characteristics of hydrogen energy storage are difficult to standardize, and the energy supply mode of the power grid needs to be further developed. Chinese patent publication number CN114976157A, published on May 25, 2022, named "A Hydrogen Energy Storage Power Station System" discloses a power station system using hydrogen energy storage, including a water electrolysis hydrogen production system, a power generation system, a hydrogen production auxiliary system, a heat recovery system, a heat dissipation system, a refrigeration system, a water supply / replenishment system, a control system and a hydrogen storage system. The power input of the electrolysis hydrogen production system is the photovoltaic power generation system and the grid-connected busbar of the city power supply. The water electrolysis hydrogen production system and the fuel cell stack are cooled by a cooling tower to ensure the safety of the power station system. However, the hydrogen energy storage power station system provided by this patent still cannot achieve accurate control of power supply equipment and accurate regulation of grid-connected power supply power. Summary of the invention

[0004] The present invention overcomes the problems of the mismatch between the power supply of the existing power grid system and the power demand of users, and the inaccurate and unstable power grid regulation, and provides a power grid regulation system and method based on hydrogen energy storage. By acquiring the current power supply and historical power supply data of the power grid system and calculating the corresponding regulation parameters, energy storage equipment is used to store electric energy when the user's power demand is low, and when the user's power demand is high, auxiliary energy supply equipment is connected to the power grid system for power supply, thereby realizing multi-level precise regulation of the power of the power grid system, ensuring a high degree of matching between the power supply capacity of the power grid system and the power demand and the continuous stability of the system.

[0005] In order to achieve the above object, the present invention adopts the following scheme: A grid control method based on hydrogen energy storage, wherein the energy supply equipment used includes a photovoltaic power generation device, a battery energy storage device and a hydrogen fuel power generation device, and the energy storage equipment used includes an electrolytic hydrogen production device and a hydrogen storage tank, and the method includes the following steps: Obtain the current power supply power and historical power supply data of the power grid system and calculate the corresponding control parameters, and use the energy supply device and the energy storage device to control the power of the power grid system according to the current power supply power and the control parameters; the historical power supply data includes the average power supply power, peak power and valley power, and the control parameters include the power supply power threshold and the energy storage power threshold; Calculate the power supply threshold , and energy storage power threshold The method is: , , ,in, is the first energy supply threshold, is the preset power fluctuation coefficient of the power grid system, is the peak electrical power, is the average power supply, is the valley power, is the second energy supply threshold, is the energy supply adjustment coefficient, ; According to the current power supply of the power grid system , the way to control the power of the power grid system is: when When the photovoltaic power generation device and the battery energy storage device are connected to the grid system for power supply, if the power in the battery energy storage device drops to the lower limit, the hydrogen fuel power generation device will be used to replace the battery energy storage device for power supply; when When the photovoltaic power generation device, battery energy storage device and hydrogen fuel power generation device are connected to the grid system for power supply; when When the power grid system and the photovoltaic power generation device charge the battery energy storage device, the power grid system and the photovoltaic power generation device supply power to the electrolysis hydrogen production device to generate hydrogen and store it in the hydrogen storage tank.

[0006] As a preference, when When the power is on, the following formula is used to calculate and control the power supply: in, is the sum of the power supply of the photovoltaic power generation device and the battery energy storage device. is the average power generation of the photovoltaic power generation device, is the rated output power of the battery energy storage device; when When the power is on, the following formula is used to calculate and control the power supply: in, It is the sum of the power supply of photovoltaic power generation device, battery energy storage device and hydrogen fuel power generation device. is the rated output power of the hydrogen fuel power generation device.

[0007] Preferably, the energy storage device also includes a hydrogen compression device and a low-temperature refrigeration device. The hydrogen compression device is used to compress the hydrogen produced by the electrolysis hydrogen production device and store it in the hydrogen storage tank. The hydrogen storage tank is divided into a low-temperature hydrogen storage tank and a normal temperature hydrogen storage tank. The low-temperature hydrogen storage tank is arranged in the low-temperature refrigeration device.

[0008] Preferably, the hydrogen fuel power generation device includes a main power generation device and a backup power generation device, the main power generation device is used to burn the hydrogen in the low-temperature hydrogen storage tank, and the backup power generation device is used to burn the hydrogen in the normal temperature hydrogen storage tank. When the hydrogen fuel power generation device is used for grid-connected power supply, there are the following modes: If the main generating device operates normally and the required power is not greater than the rated power generation rate of the main generating device, only the main generating device is enabled; If the main generating unit operates normally and the required power is greater than the rated power generation rate of the main generating unit, the main generating unit and the standby generating unit are activated at the same time; If the main power generation unit fails, only the backup power generation unit will be enabled.

[0009] Preferably, the battery energy storage device is divided into a plurality of battery units, and some of the battery units are specifically used to power the low-temperature refrigeration device.

[0010] Preferably, the energy supply equipment further comprises a wind power generation device, and the wind power generation device and the photovoltaic power generation device are combined to form a wind-solar complementary power generation system.

[0011] The present application also provides a power grid control system based on hydrogen energy storage, which includes: An electrolytic hydrogen production device, which is connected to a power grid system and a photovoltaic power generation device for power supply, wherein a hydrogen outlet of the electrolytic hydrogen production device is connected to a hydrogen compression device, and the hydrogen compression device is connected to a hydrogen storage tank; A hydrogen fuel power generation device, which is used to burn the hydrogen in the hydrogen storage tank to generate electricity; A battery energy storage device connected to the photovoltaic power generation device and the hydrogen fuel power generation device; The photovoltaic power generation device, hydrogen fuel power generation device and battery energy storage device are all connected to the power grid system through an inverter; A central controller is provided with a processor, which is used to load and execute a method as described in any one of the above schemes, wherein the central controller obtains the current power supply and historical power supply data of the power grid system and calculates the corresponding control parameters, and controls the operating status of the electrolysis hydrogen production device, photovoltaic power generation device, hydrogen compression device, hydrogen fuel power generation device and battery energy storage device according to the current power supply and control parameters to perform power control on the power grid system.

[0012] Preferably, a low-temperature refrigeration device is further included, and the hydrogen storage tank includes a low-temperature hydrogen storage tank and a normal-temperature hydrogen storage tank, and the low-temperature hydrogen storage tank is arranged in the low-temperature refrigeration device.

[0013] Preferably, the battery energy storage device comprises a plurality of battery units, and the low-temperature refrigeration device is powered by a plurality of the battery units.

[0014] Preferably, the hydrogen fuel power generation device includes a main power generation device and a backup power generation device, the main power generation device is connected to the low-temperature hydrogen storage tank, and the backup power generation device is connected to the normal temperature hydrogen storage tank.

[0015] The present invention includes at least the following beneficial effects: (1) the power generated by the photovoltaic power generation device is converted into hydrogen for storage through the electrolytic hydrogen production device, and hydrogen combustion is used to generate electricity to realize grid-connected power supply when needed, thereby avoiding the problem of unstable power when the photovoltaic power generation device directly supplies power; (2) the battery energy storage device, the electrolytic hydrogen production device and the hydrogen storage tank are used to convert and store energy when the power grid system has sufficient power, and a large amount of power support can be provided in time when the power demand is large, thereby realizing real-time power regulation of the power grid system; (3) by calculating the corresponding control parameters, the corresponding energy supply equipment and energy storage equipment are controlled according to the control parameters and the current power supply power, thereby realizing hierarchical and precise control of the power supply power of the power grid system, reducing power supply losses, and making the power supply capacity of the power grid system more stable; (4) by setting a low-temperature hydrogen storage tank, a normal-temperature hydrogen storage tank, a main power generation device and a backup power generation device for coordinated use, the low-temperature hydrogen storage tank improves the storage capacity of the hydrogen storage tank, and the backup power generation device can avoid the impact of the failure of the hydrogen fuel power generation device on the power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic structural diagram of a power grid control system based on hydrogen energy storage provided by the present invention. DETAILED DESCRIPTION

[0017] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0018] The invention provides a method for controlling a power grid based on hydrogen energy storage, such as Figure 1As shown, the energy supply equipment used includes a photovoltaic power generation device, a battery energy storage device and a hydrogen fuel power generation device, the energy storage equipment used includes an electrolytic hydrogen production device and a hydrogen storage tank, and the method includes the following steps: The current power supply and historical power supply data of the power grid system are obtained and the corresponding control parameters are calculated. The power supply device and the energy storage device are used to control the power of the power grid system according to the current power supply and control parameters; the historical power supply data include the average power supply power, peak power and valley power, and the control parameters include the power supply power threshold and the energy storage power threshold. The current power and historical power supply data of the power grid system can be directly obtained in the management platform of the power grid system, and the current power can also be measured and obtained in real time through the power measurement tool set up at the power station, where the peak power is the highest power of the power grid system under stable operation during the peak power consumption period, and the valley power is the lowest power of the power grid system under stable operation during the valley power consumption period. The power supply equipment and energy storage equipment used are all equipped in the same power station, and the battery energy storage device serves as both a power supply device and an energy storage device.

[0019] Calculate the power supply threshold , and energy storage power threshold The method is: , , ,in, is the first energy supply threshold, is the preset power fluctuation coefficient of the power grid system, is the peak electrical power, is the average power supply, is the valley power, is the second energy supply threshold, is the energy supply adjustment coefficient, The power supply of the power grid system has a certain normal fluctuation range, and the power grid system can adapt to the power fluctuation within this range through self-regulation. To characterize the coefficient of this normal fluctuation range, It is a critical value determined according to the power supply capacity of the photovoltaic power generation device and the battery energy storage device, and the grid-connected energy supply mode is changed based on this critical value.

[0020] According to the current power supply of the power grid system , the way to control the power of the power grid system is: when When the power demand is higher than the normal power fluctuation range of the power grid system, a small amount of additional energy is required to maintain the normal operation of the power grid system and alleviate the system burden. The photovoltaic power generation device is used for grid-connected power supply. The output power of the battery energy storage device can be accurately controlled to adapt to the power instability of photovoltaic power generation, so as to achieve a stable power supply effect. If the battery energy storage device is in this state for a long time and the power supply of the battery energy storage device drops to the preset lower limit, the hydrogen fuel power generation device is activated as a substitute.

[0021] when When the photovoltaic power generation device, battery energy storage device and hydrogen fuel power generation device are connected to the grid system at the same time for power supply; at this time, the additional energy supply required by the grid system exceeds the grid-connected power supply power of the photovoltaic power generation device and the battery energy storage device, and the hydrogen fuel power generation device is required to further generate electricity and connect to the grid to maintain the normal operation of the grid system.

[0022] when When the grid system and the photovoltaic power generation device charge the battery energy storage device, the grid system and the photovoltaic power generation device supply power to the electrolytic hydrogen production device to generate hydrogen and store it in the hydrogen storage tank. At this time, the grid system's workload is lower than normal, and part of the electricity is stored in the battery energy storage device or converted into hydrogen for storage. After reaching a certain storage capacity, for example, when the power in the battery energy storage device reaches 60% and the amount of hydrogen in the hydrogen storage tank reaches the amount required for at least one peak power supply cycle, the grid system stops drawing power, and the photovoltaic power generation device is used first to charge the battery energy storage device and drive the electrolytic hydrogen production device.

[0023] This method converts the power generated by the photovoltaic power generation device into hydrogen for storage through an electrolytic hydrogen production device, and uses hydrogen combustion to generate electricity when needed to achieve grid-connected power supply, avoiding the problem of unstable power when the photovoltaic power generation device directly supplies power; uses battery energy storage devices, electrolytic hydrogen production devices and hydrogen storage tanks to convert and store energy when the power grid system has sufficient power, and can provide a large amount of power support in time when the power consumption is large, realizing real-time power regulation of the power grid system; by calculating the corresponding regulation parameters, the corresponding energy supply equipment and energy storage equipment are controlled according to the regulation parameters and the current power supply power, thereby realizing hierarchical and precise regulation of the power supply power of the power grid system, reducing power supply losses, and making the power supply capacity of the power grid system more stable.

[0024] In another technical solution, when When the power is on, the following formula is used to calculate and control the power supply: in, is the sum of the power supply of the photovoltaic power generation device and the battery energy storage device. is the average power generation of the photovoltaic power generation device, is the rated output power of the battery energy storage device; calculated periodically As the best supplementary power at present, combined with the real-time power of the photovoltaic power generation device, the sum of the grid-connected power supply of the two is controlled within 100% by adjusting the output power of the battery energy storage device. If the battery energy storage device is below the lower limit, It is the sum of the power supply of the photovoltaic power generation device and the hydrogen fuel power generation device.

[0025] when When the power is on, the following formula is used to calculate and control the power supply: in, It is the sum of the power supply of photovoltaic power generation device, battery energy storage device and hydrogen fuel power generation device. is the rated output power of the hydrogen fuel power generation device. Periodic calculation As the best supplementary power at present, the battery energy storage device outputs at rated output power, combined with the real-time power of the photovoltaic power generation device, and by adjusting the output power of the hydrogen fuel power generation device, the sum of the grid-connected power supply of the three is controlled within about.

[0026] In another technical solution, the energy storage device further includes a hydrogen compression device and a low-temperature refrigeration device. The hydrogen compression device is used to compress the hydrogen generated by the electrolytic hydrogen production device and store it in the hydrogen storage tank. The hydrogen storage tank is divided into a low-temperature hydrogen storage tank and a normal-temperature hydrogen storage tank, and the low-temperature hydrogen storage tank is arranged in the low-temperature refrigeration device. The low-temperature hydrogen storage tank has the storage characteristics of low temperature and high pressure, and has a more efficient and larger capacity storage effect for hydrogen with a lower liquefaction critical point. The normal-temperature hydrogen storage tank can be easily used in rotation, and the excess hydrogen can be stored in the normal-temperature hydrogen storage tank and provided to hydrogen energy users.

[0027] The hydrogen fuel power generation device includes a main power generation device and a backup power generation device. The main power generation device is used to burn the hydrogen in the low-temperature hydrogen storage tank, and the backup power generation device is used to burn the hydrogen in the normal-temperature hydrogen storage tank. When the hydrogen fuel power generation device is used for grid-connected power supply, there are the following modes: If the main generating device operates normally and the required power is not greater than the rated power generation rate of the main generating device, only the main generating device is enabled; If the main generating unit operates normally and the required power is greater than the rated power generation rate of the main generating unit, the main generating unit and the standby generating unit are activated at the same time; If the main power generation unit fails, only the backup power generation unit will be enabled.

[0028] By setting up a low-temperature hydrogen storage tank, a normal-temperature hydrogen storage tank, a main power generation device and a backup power generation device for coordinated use, the low-temperature hydrogen storage tank increases the storage capacity of the hydrogen storage tank, and the backup power generation device can avoid the impact of failure of the hydrogen fuel power generation device on power supply.

[0029] The battery energy storage device is divided into a plurality of battery units, and some of the battery units are used to supply power to the low-temperature refrigeration device. Some battery units provide stable power supply to the low-temperature refrigeration device to ensure its continuous normal operation, and the remaining battery units can be used for grid-connected power supply.

[0030] In another technical solution, the energy supply device further includes a wind power generation device, and the wind power generation device and the photovoltaic power generation device are combined to form a wind-solar complementary power generation system. Through wind-solar complementary power generation, the influence of insufficient light energy on power supply is avoided, and the power generation efficiency is improved.

[0031] like Figure 1 As shown, the present application also provides a grid control system based on hydrogen energy storage, which includes: An electrolytic hydrogen production device, which is connected to a power grid system and a photovoltaic power generation device for power supply, wherein a hydrogen outlet of the electrolytic hydrogen production device is connected to a hydrogen compression device, and the hydrogen compression device is connected to a hydrogen storage tank; A hydrogen fuel power generation device, which is used to burn the hydrogen in the hydrogen storage tank to generate electricity; A battery energy storage device connected to the photovoltaic power generation device and the hydrogen fuel power generation device; The photovoltaic power generation device, hydrogen fuel power generation device and battery energy storage device are all connected to the power grid system through an inverter; A central controller is provided with a processor, the processor is used to load and execute the method as described in any one of the above schemes, the central controller obtains the current power supply and historical power supply data of the power grid system and calculates the corresponding control parameters, and controls the operating status of the electrolytic hydrogen production device, photovoltaic power generation device, hydrogen compression device, hydrogen fuel power generation device and battery energy storage device according to the current power supply and control parameters to perform power control on the power grid system. When executing the methods provided by different schemes, the central controller adapts to the use conditions of the corresponding methods and adds corresponding equipment configurations, and thus the beneficial effects of the system are equivalent to the beneficial effects of the corresponding methods.

[0032] In another technical solution, the grid control system based on hydrogen energy storage also includes a low-temperature refrigeration device, the hydrogen storage tank includes a low-temperature hydrogen storage tank and a normal temperature hydrogen storage tank, and the low-temperature hydrogen storage tank is arranged in the low-temperature refrigeration device.

[0033] The battery energy storage device includes a plurality of battery units, and the low-temperature refrigeration device is powered by a plurality of the battery units.

[0034] The hydrogen fuel power generation device includes a main power generation device and a backup power generation device. The main power generation device is connected to the low-temperature hydrogen storage tank, and the backup power generation device is connected to the normal-temperature hydrogen storage tank.

[0035] It should be noted that, although the above describes the various steps in a specific order, it does not mean that the various steps must be performed in the above specific order. In fact, some of these steps can be performed concurrently or even in a different order, as long as the required functions can be achieved. The number of devices and processing scales described here are used to simplify the description of the present invention, and the application, modification and variation of the present invention are obvious to those skilled in the art.

[0036] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A grid control method based on hydrogen energy storage, characterized in that: The energy supply equipment used includes a photovoltaic power generation device, a battery energy storage device and a hydrogen fuel power generation device, the energy storage equipment used includes an electrolytic hydrogen production device and a hydrogen storage tank, and the method includes the following steps: Obtain the current power supply power and historical power supply data of the power grid system and calculate the corresponding control parameters, and use the energy supply device and the energy storage device to control the power of the power grid system according to the current power supply power and the control parameters; the historical power supply data includes the average power supply power, peak power and valley power, and the control parameters include the power supply power threshold and the energy storage power threshold; Calculate the power supply threshold , and energy storage power threshold The method is: , , ,in, is the first energy supply threshold, is the preset power fluctuation coefficient of the power grid system, is the peak electrical power, is the average power supply, is the valley power, is the second energy supply threshold, is the energy supply adjustment coefficient, ; According to the current power supply of the power grid system , the way to control the power of the power grid system is: when When the photovoltaic power generation device and the battery energy storage device are connected to the grid system for power supply, if the power in the battery energy storage device drops to the lower limit, the hydrogen fuel power generation device will be used to replace the battery energy storage device for power supply; when When the photovoltaic power generation device, battery energy storage device and hydrogen fuel power generation device are connected to the grid system for power supply; when When the power grid system and the photovoltaic power generation device charge the battery energy storage device, the power grid system and the photovoltaic power generation device supply power to the electrolysis hydrogen production device to generate hydrogen and store it in the hydrogen storage tank.

2. The method for controlling a power grid based on hydrogen energy storage according to claim 1, characterized in that: At that time, the following formula was used to calculate and control the power supply: in, is the sum of the power supply of the photovoltaic power generation device and the battery energy storage device. is the average power generation of the photovoltaic power generation device, is the rated output power of the battery energy storage device; when When the power is on, the following formula is used to calculate and control the power supply: in, It is the sum of the power supply of photovoltaic power generation device, battery energy storage device and hydrogen fuel power generation device. is the rated output power of the hydrogen fuel power generation device.

3. The method for controlling a power grid based on hydrogen energy storage according to claim 1, characterized in that: The energy storage device also includes a hydrogen compression device and a low-temperature refrigeration device. The hydrogen compression device is used to compress the hydrogen generated by the electrolytic hydrogen production device and store it in the hydrogen storage tank. The hydrogen storage tank is divided into a low-temperature hydrogen storage tank and a normal-temperature hydrogen storage tank. The low-temperature hydrogen storage tank is arranged in the low-temperature refrigeration device.

4. The method for controlling a power grid based on hydrogen energy storage according to claim 3, characterized in that: The hydrogen fuel power generation device includes a main power generation device and a backup power generation device. The main power generation device is used to burn the hydrogen in the low-temperature hydrogen storage tank, and the backup power generation device is used to burn the hydrogen in the normal-temperature hydrogen storage tank. When the hydrogen fuel power generation device is used for grid-connected power supply, there are the following modes: If the main generating device operates normally and the required power is not greater than the rated power generation rate of the main generating device, only the main generating device is enabled; If the main generating unit operates normally and the required power is greater than the rated power generation rate of the main generating unit, the main generating unit and the standby generating unit are activated at the same time; If the main power generation unit fails, only the backup power generation unit will be enabled.

5. The method for controlling a power grid based on hydrogen energy storage according to claim 3, characterized in that: The battery energy storage device is divided into a plurality of battery units, and some of the battery units are specifically used to supply power to the low-temperature refrigeration device.

6. The method for controlling a power grid based on hydrogen energy storage according to claim 1, characterized in that: The energy supply equipment also includes a wind power generation device, and the wind power generation device and the photovoltaic power generation device are combined to form a wind-solar complementary power generation system.

7. A power grid control system based on hydrogen energy storage, characterized in that: include: An electrolytic hydrogen production device, which is connected to a power grid system and a photovoltaic power generation device for power supply, wherein a hydrogen outlet of the electrolytic hydrogen production device is connected to a hydrogen compression device, and the hydrogen compression device is connected to a hydrogen storage tank; A hydrogen fuel power generation device, which is used to burn the hydrogen in the hydrogen storage tank to generate electricity; A battery energy storage device connected to the photovoltaic power generation device and the hydrogen fuel power generation device; The photovoltaic power generation device, hydrogen fuel power generation device and battery energy storage device are all connected to the power grid system through an inverter; A central controller is provided with a processor, wherein the processor is used to load and execute the method as described in any one of claims 1-2, wherein the central controller obtains the current power supply and historical power supply data of the power grid system and calculates the corresponding control parameters, and controls the operating status of the electrolysis hydrogen production device, photovoltaic power generation device, hydrogen compression device, hydrogen fuel power generation device and battery energy storage device according to the current power supply and control parameters to perform power control on the power grid system.

8. The power grid control system based on hydrogen energy storage according to claim 7 is characterized in that: It also includes a low-temperature refrigeration device, the hydrogen storage tank includes a low-temperature hydrogen storage tank and a normal-temperature hydrogen storage tank, and the low-temperature hydrogen storage tank is arranged in the low-temperature refrigeration device.

9. The power grid control system based on hydrogen energy storage according to claim 8, characterized in that: The battery energy storage device includes a plurality of battery units, and the low-temperature refrigeration device is powered by a plurality of the battery units.

10. The power grid control system based on hydrogen energy storage according to claim 8, characterized in that: The hydrogen fuel power generation device includes a main power generation device and a backup power generation device. The main power generation device is connected to the low-temperature hydrogen storage tank, and the backup power generation device is connected to the normal-temperature hydrogen storage tank.

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