Hybrid electrolysis plant and method thereof, medium and computer program product

Abstract

The present disclosure provides a hybrid electrolysis plant, a method for operating a hybrid electrolysis plant, a computer readable storage medium, and a computer program product. The method for operating the hybrid electrolysis plant includes: in response to satisfying a frequency response condition, determining a frequency response power, where the frequency response condition includes at least one of: receiving a frequency modulation service instruction from a grid control center of a grid; detecting frequency disturbance of the power grid; and distributing the frequency response power to the electrolyzer and the energy storage unit at least partially based on the response characteristic of the electrolyzer, so that the grid-connected active power of the hybrid electrolysis plant is adjusted according to the frequency response power.

Description

Technical Field

[0001] The present disclosure relates to a hybrid electrolysis plant, a method for operating a hybrid electrolysis plant, a computer-readable storage medium, and a computer program product. Background Art

[0002] As an environmentally friendly energy carrier, hydrogen can power a variety of applications, such as long-distance transportation (e.g., via heavy trucks, airplanes, ferries, etc.), steelmaking, and ammonia production. Currently, hydrogen is produced by electrolyzing water in electrolysis plants.

[0003] However, the response speed of the electrolyzers in an electrolysis plant is often too slow to provide grid ancillary services (e.g., frequency response services) as required by the grid operator.

[0004] In the prior art reference "A Novel Multi-Scale Frequency Regulation Method of Hybrid Rectifier and Its Specific Application in Electrolytic Hydrogen Production", an auxiliary converter is provided between the grid connection point and the electrolyzer to compensate for the slower response of the main converter connected between the grid connection point and the electrolyzer. However, this prior art reference ignores the fact that the main reason why the electrolysis plant cannot provide the faster response required by the grid operator is that the response speed of the electrolyzer itself, rather than the main converter, is quite slow. Therefore, even if an auxiliary converter is added as in the above prior art reference, it cannot solve the problem that the electrolysis plant cannot provide the faster response required by the grid operator.

[0005] The methods described in this section are not necessarily methods that have been previously conceived or used. Unless otherwise explicitly stated, it should not be considered that any method described in this section is prior art simply because it is included in this section. Similarly, unless otherwise explicitly stated, the problems mentioned in this section should not be regarded as problems generally recognized in any prior art. Summary of the invention

[0006] The present disclosure provides a hybrid electrolysis plant, a method for operating a hybrid electrolysis plant, a computer-readable storage medium, and a computer program product.

[0007] According to one aspect of the present disclosure, a method for operating a hybrid electrolysis plant is provided, wherein the hybrid electrolysis plant includes an electrolyzer and an energy storage unit, and the hybrid electrolysis plant is coupled to a power grid at a grid connection point, the method comprising: determining a frequency response power in response to satisfying a frequency response condition, wherein the frequency response condition comprises at least one of the following: receiving a frequency regulation service instruction from a grid control center of the power grid; and detecting a frequency disturbance of the power grid; and allocating the frequency response power to the electrolyzer and the energy storage unit based at least in part on a response characteristic of the electrolyzer, so that the grid-connected active power of the hybrid electrolysis plant is adjusted according to the frequency response power. According to some embodiments, the frequency response power corresponding to the frequency response can be allocated to the electrolyzer and the energy storage unit, so that the energy storage unit can compensate for the slower response of the electrolyzer, thereby enabling the grid-connected active power to reach the faster frequency response required by the grid operator.

[0008] According to some embodiments, in response to satisfying the frequency response condition, determining the frequency response power includes: in response to satisfying the frequency response condition at the response start time, determining a response curve of the frequency response power according to at least one of a received frequency regulation service instruction or a frequency of the power grid, wherein the response curve of the frequency response power changes the total committed power within the total ramp time; and determining the frequency response power based on the response curve of the frequency response power and the time elapsed from the response start time. According to some embodiments, different types of power grid frequency regulation services can be implemented according to at least one of the received frequency regulation service instruction and the power grid frequency.

[0009] According to some embodiments, the response characteristic of the electrolyzer includes a rate of change of the active power of the electrolyzer, and allocating the frequency response power to the electrolyzer and the energy storage unit includes: setting a first committed power based at least in part on the total committed power, wherein the first committed power is allocated to the electrolyzer, and a response curve of the active power of the electrolyzer changes the first committed power at the rate of change of the active power of the electrolyzer within the electrolyzer tilting duration; determining a second committed power based on the total committed power and the first committed power, wherein the second committed power is allocated to the energy storage unit; determining a rate of change of grid-connected active power based on the total committed power and the total tilting duration; determining a response curve of the active power of the energy storage unit based on the rate of change of the grid-connected active power, the total tilting duration, the rate of change of the active power of the electrolyzer, the electrolyzer tilting duration, and the second committed power; and setting the active power of the energy storage unit based on the response curve of the active power of the energy storage unit and the time elapsed from the response start moment. According to some embodiments, a response curve of the active power of the energy storage unit may be set to compensate for the slower rate of change of the active power of the electrolyser, which alone cannot meet the requirements of the grid.

[0010] According to some embodiments, at least partially based on the total committed power, setting the first committed power includes at least one of the following: in response to the electricity price of the power grid being greater than the electricity price threshold, setting the first committed power based on the total committed power and the electricity price of the power grid; and in response to the storage capacity of the energy storage unit being less than the storage capacity threshold, setting the first committed power to the total committed power. According to some embodiments, the economic efficiency of the hybrid electrolysis plant and / or the balance of the storage capacity (State of Charge, SOC) of the energy storage unit can be achieved.

[0011] According to some embodiments, based on the change rate of the grid-connected active power, the total tilting duration, the change rate of the active power of the electrolyzer, the tilting duration of the electrolyzer, and the second committed power, determining the response curve of the active power of the energy storage unit includes: determining the first change rate of the active power of the energy storage unit based on the change rate of the active power of the electrolyzer and the change rate of the grid-connected active power, wherein the first change rate is the change rate of the active power of the energy storage unit from the response start time within the total tilting duration; determining the second change rate of the active power of the energy storage unit based on the change rate of the active power of the electrolyzer, wherein the second change rate is the change rate of the active power of the energy storage unit from the response start time, which has passed the total tilting duration but is within the tilting duration of the electrolyzer; and determining the response curve of the active power of the energy storage unit based on the total tilting duration, the tilting duration of the electrolyzer, the first change rate and the second change rate of the active power of the energy storage unit, and the second committed power. According to some embodiments, the change rate of the active power of the energy storage unit can be set to compensate for the slower change rate of the active power of the electrolyzer.

[0012] According to some embodiments, the method for operating a hybrid hydrogen production plant further includes: in response to satisfying a recovery condition at a recovery start time, determining a frequency response power based on a recovery curve of the frequency response power, wherein the recovery condition includes at least one of the following: detecting that a support duration has passed after the response start time; receiving an end service instruction; and detecting that the frequency of the power grid is within a recovery frequency range, wherein the recovery curve of the frequency response power recovers to the grid-connected active power of the hybrid electrolysis plant at the response start time at a power recovery change rate starting from the recovery start time, and / or recovers to the grid-connected active power of the hybrid electrolysis plant at the response start time within the recovery duration. According to some embodiments, the frequency response service may be terminated, wherein the frequency response power may be determined based on the recovery curve of the frequency response power, thereby satisfying the grid operator's requirement to terminate the frequency response service.

[0013] According to some embodiments, detecting the frequency disturbance of the power grid includes: detecting the frequency disturbance of the power grid based on at least one of the frequency of the power grid, the amount of change in the frequency of the power grid, and the rate of change in the frequency of the power grid. According to some embodiments, the frequency disturbance of the power grid can be accurately detected.

[0014] According to some embodiments, based on at least one of the frequency of the power grid, the amount of change in the frequency of the power grid, and the rate of change in the frequency of the power grid, detecting a frequency disturbance of the power grid includes at least one of the following: detecting that the frequency of the power grid is less than a first frequency threshold; detecting that the frequency of the power grid is greater than a second frequency threshold; detecting that the amount of change in the frequency of the power grid is greater than a change amount threshold; and detecting that the rate of change in the frequency of the power grid is greater than a rate of change threshold. According to some embodiments, frequency disturbances may be detected according to different criteria.

[0015] According to some embodiments, the method for operating a hybrid hydrogen production plant further includes: in response to the hybrid electrolysis plant not meeting the frequency response condition after startup or the frequency response power recovering to the grid-connected active power of the hybrid electrolysis plant at the time of response startup, setting the active power of the energy storage unit according to at least one of the electricity price of the grid, the hydrogen demand of the hybrid electrolysis plant, and the storage capacity of the energy storage unit. According to some embodiments, the hybrid electrolysis plant has operational flexibility, which can optimize the hydrogen production and charging / discharging of the integrated energy storage system according to the available information of the market energy price and / or the energy storage status of the energy storage unit.

[0016] According to some embodiments, the energy storage unit includes a battery and a supercapacitor, and wherein allocating the frequency response power to the electrolyzer and the energy storage unit further includes: in response to the support duration corresponding to the frequency response condition being less than a duration threshold, allocating the active power of the energy storage unit to the supercapacitor; and in response to the support duration corresponding to the frequency response condition being greater than or equal to the duration threshold, allocating the active power of the energy storage unit to the battery. According to some embodiments, the active power of the energy storage unit can be allocated to different types of energy storage units according to the support duration.

[0017] According to some embodiments, the method for operating a hybrid hydrogen production plant further includes: in response to detecting that the voltage at the grid connection point is lower than the low voltage crossing threshold, reducing the active power of the electrolyzer to the lower limit of the active power of the electrolyzer, and setting the active power of the energy storage unit to the active power of the electrolyzer; and setting the grid-connected reactive power of the hybrid electrolysis plant based on the voltage of the grid. According to some embodiments, the energy storage unit provides active power to the electrolyzer, maintains the operation of the electrolyzer, ensures the reliability of the electrolyzer, and avoids an excessively long restart time of the electrolyzer; reduces the active power of the electrolyzer to the lower limit, thereby reducing the energy consumption of the energy storage unit; and the hybrid electrolysis plant provides reactive power to the grid to support the grid.

[0018] According to some embodiments, the method for operating a hybrid hydrogen production plant further includes: in response to detecting that the voltage at the grid connection point is lower than a first voltage threshold or higher than a second voltage threshold, setting the grid-connected reactive power of the hybrid electrolysis plant based on the voltage of the grid, wherein the first voltage threshold is less than the second voltage threshold. According to some embodiments, the hybrid electrolysis plant can provide reactive power services relative to the voltage.

[0019] According to some embodiments, the method for operating a hybrid hydrogen production plant further comprises: in response to detecting that the power factor of the grid connection point is lower than a power factor threshold, setting the grid-connected reactive power of the hybrid electrolysis plant based on the power factor of the grid. According to some embodiments, the hybrid electrolysis plant can provide high power factor operation.

[0020] According to another aspect of the present disclosure, a hybrid electrolysis plant is provided. The hybrid electrolysis plant is coupled to a power grid, and comprises: an electrolyzer; an energy storage unit; and a plant controller, wherein the plant controller is configured to execute any method described in the present disclosure.

[0021] According to another aspect of the present disclosure, a computer-readable storage medium is provided, on which computer-readable instructions are stored. When the computer-readable instructions are executed by a processor, the processor is caused to perform any method described in the present disclosure.

[0022] According to yet another aspect of the present disclosure, a computer program product is provided. The computer program product comprises instructions. When the instructions are executed by a computer, the computer is caused to perform the method as described in the present disclosure.

[0023] The technical effects of the above method can be applied to hybrid electrolysis plants, computer-readable storage media and computer program products, so they will not be described in detail here.

[0024] It should be understood that the content described in this section is not used to identify the key or important features of the embodiments of the present disclosure, nor is it used to limit the scope of the present disclosure. Other features of the present disclosure will be easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings exemplarily illustrate the embodiments and constitute a part of the specification and are used together with the text description of the specification to illustrate exemplary implementations of the embodiments. The illustrated embodiments are for illustrative purposes only and do not limit the scope of the claims. Throughout the drawings, similar reference numerals represent similar but not necessarily identical elements.

[0026] Figure 1 is a schematic diagram illustrating a hybrid electrolysis plant according to some embodiments of the present disclosure;

[0027] Figure 2 is a flow chart illustrating a method for operating a hybrid electrolysis plant according to some embodiments of the present disclosure;

[0028] Figure 3 is a schematic diagram showing a frequency response power response curve according to some embodiments of the present disclosure;

[0029] Figure 4 is a diagram showing some embodiments of the present disclosure Figure 2A flow chart of a process for allocating frequency response power to electrolyzers and energy storage units;

[0030] Figure 5A-5B is a schematic diagram showing the distribution of frequency responsive power to an electrolyzer and an energy storage unit;

[0031] Figure 6A-6B is a schematic diagram showing the distribution of frequency responsive power to an electrolyzer and an energy storage unit;

[0032] Figure 7A-7B is a schematic diagram showing the distribution of frequency responsive power to an electrolyzer and an energy storage unit;

[0033] Figure 8 is a schematic diagram showing a computing device that can be used according to the methods disclosed herein. . DETAILED DESCRIPTION

[0034] The present disclosure will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is understood that the embodiments described herein are only used to explain the relevant disclosure and are not used to limit the present disclosure. It should also be noted that, for ease of description, only the parts related to the relevant disclosure are shown in the accompanying drawings.

[0035] It should be noted that, in the absence of conflict, the embodiments in the present disclosure and the features in the embodiments can be combined with each other. If the number of elements is not specifically defined, there can be one or more elements, unless otherwise clearly stated in the context. In addition, the number of steps or functional modules used in the present disclosure is only used to identify the steps or functional modules, and does not limit the order of executing the steps or the connection relationship between the functional modules. As used in this article, the term "and / or" includes any combination and all combinations of one or more related listed items. The term "based on" should be interpreted as "based at least in part on".

[0036] Currently, grid operators may require electrolysis plants to provide grid ancillary services, such as frequency response services. Frequency response services require electrolysis plants to provide active power support to the grid to help the grid survive frequency disturbances. However, electrolyzers in electrolysis plants usually respond slowly and cannot meet the fast response requirements of grid operators.

[0037] To solve the above problems, the present disclosure provides a method for operating a hybrid electrolysis plant, wherein the hybrid electrolysis plant includes an electrolyzer and an energy storage unit, and the hybrid electrolysis plant is coupled to a grid at a grid connection point, the method comprising: determining a frequency response power in response to satisfying a frequency response condition, wherein the frequency response condition comprises at least one of the following: receiving a frequency regulation service instruction from a grid control center of the grid; and detecting a frequency disturbance of the grid; and allocating the frequency response power to the electrolyzer and the energy storage unit based at least in part on the response characteristics of the electrolyzer, so that the grid-connected active power of the hybrid electrolysis plant is adjusted according to the frequency response power.

[0038] In addition, the present disclosure also provides a hybrid electrolysis plant, which is coupled to a power grid, and includes: an electrolyzer; an energy storage unit; and a plant controller, and the plant controller is configured to execute any method described in the present disclosure.

[0039] According to some embodiments, frequency response power corresponding to the frequency response may be allocated to the electrolyzer and the energy storage unit, so that the energy storage unit can compensate for the slower response of the electrolyzer, thereby enabling the grid-connected active power to achieve the faster frequency response required by the grid operator.

[0040] Figure 1 is a schematic diagram illustrating a hybrid electrolysis plant 100 according to some embodiments of the present disclosure.

[0041] like Figure 1 As shown, the hybrid electrolysis plant 100 includes an electrolyzer 101, an energy storage unit 102, and a plant controller 103. It should be understood that although Figure 1 Only one electrolyzer 101 and one energy storage unit 102 are shown, but Figure 1 For illustration only, the hybrid electrolysis plant 100 may further include a plurality of electrolyzers 101 and / or energy storage units 102. For example, the hybrid electrolysis plant 100 may include a plurality of electrolyzers 101 and a plurality of energy storage units 102.

[0042] In addition, if Figure 1 As shown, the hybrid electrolysis plant 100 is connected to the grid 110 at the grid connection point 120. According to some embodiments, the plant controller 103 detects electrical parameters (eg, grid frequency, grid voltage) of the grid connection point 120 to perform control over the electrolyzer 101 and the energy storage unit 102.

[0043] According to some embodiments, each of the electrolyzer and the energy storage unit has a sub-controller that receives a control signal, such as an active power control signal, from the plant controller 103 .

[0044] According to some embodiments, the energy storage unit 102 is integrated into the hybrid electrolysis plant 100, that is, the energy storage unit 102 becomes a part of the hybrid electrolyzer plant 100, so the energy storage unit 102 can provide the frequency response power required by the grid operator together with the electrolyzer 101. According to some embodiments, the electrolyzer 101 and the energy storage unit 102 can be coupled to the grid 110 through a transformer and / or a power converter, for example, the electrolyzer 101 and the energy storage unit 102 can be connected to the bus (e.g., a DC bus or an AC bus) through corresponding power converters, and then connected to the grid 110 through a grid-connected transformer and / or a grid-connected converter. According to some embodiments, there may also be multiple buses to improve the reliability and / or capacity of the hybrid electrolysis plant. The present disclosure is not intended to limit the specific connection between the electrolyzer 101 and the energy storage unit 102 in the hybrid electrolysis plant 100 and the specific connection between the hybrid electrolysis plant 100 and the grid 110.

[0045] Figure 2 is a flow chart showing a method 200 for operating a hybrid electrolysis plant according to some embodiments of the present disclosure. According to some embodiments, the method 200 may be used to operate a hybrid electrolysis plant (e.g., Figure 1 A hybrid electrolysis plant 100) is provided, wherein the hybrid electrolysis plant includes an electrolyzer and an energy storage unit and is coupled to a power grid.

[0046] like Figure 2 As shown, the method 200 includes:

[0047] Step S210: determining a frequency response power in response to satisfying a frequency response condition, wherein the frequency response condition includes at least one of the following: receiving a frequency regulation service instruction from a power grid control center of the power grid; and detecting a frequency disturbance of the power grid; and

[0048] Step S220: Based at least in part on the response characteristics of the electrolyzer, the frequency response power is allocated to the electrolyzer and the energy storage unit, so that the grid-connected active power of the hybrid electrolysis plant is adjusted according to the frequency response power.

[0049] In some embodiments, the frequency response service may be initiated based on satisfying a frequency response condition corresponding to a criterion:

[0050] Example 1: When the grid frequency is normal (for example, the grid frequency is within the allowable normal frequency deviation range) or abnormal (for example, the grid frequency exceeds the allowable normal frequency deviation range), the plant controller receives a frequency regulation service instruction issued by the grid control center and activates the indicated frequency response service.

[0051] Example 2: The plant controller detects a grid frequency disturbance based on local measurement results (for example, the change in grid frequency is greater than a change threshold, and / or the rate of change of frequency (RoCoF) is greater than a change rate threshold), and activates a corresponding frequency response service. Since the startup time of the frequency response service is very short (for example, less than 1 second), no service command from the grid control center is required.

[0052] According to some other embodiments, the frequency response service may be initiated based on satisfying frequency response conditions corresponding to multiple criteria. For example, the frequency response service may be initiated when a frequency modulation service instruction is received and a frequency disturbance is detected, thereby avoiding accidental triggering of the frequency response service.

[0053] According to some embodiments, a "frequency response condition" refers to a condition for determining whether to initiate a frequency response service.

[0054] According to some embodiments, an “electrolyzer” refers to a component capable of separating water into hydrogen and oxygen using electrical energy, an “energy storage unit” refers to a component capable of storing energy and outputting its stored energy when necessary, such as a supercapacitor, a battery, etc., and a “grid” refers to a network that provides electricity to electricity users.

[0055] According to some embodiments, the frequency service provided by the hybrid electrolysis plant may be an inertial response, a frequency restoration reserve (Frequency Restoration Reserves, FFRs), a frequency suppression response (Frequency Containment Response, FCR), an automatic frequency restoration reserve (Automatic FRR, aFRR), a balancing energy and balancing capacity (Balancing Energy and Balancing Capacity, mFRR), a reserve restoration or a replacement reserve (Reserve Restoration or Replacement Reserve, RR). According to some embodiments, the frequency service may be initiated based on a frequency regulation service instruction from a grid control center and / or a local frequency measurement of the hybrid electrolysis plant.

[0056] According to some embodiments, a "frequency regulation service instruction" refers to a command issued by a power grid control center indicating that a plant should provide a specific frequency service, and the specific frequency service defines the active power regulation of the plant.

[0057] According to some embodiments, a "grid control center" refers to a control center of a power grid that controls the flow of power in the grid.

[0058] According to some embodiments, "frequency response power" refers to the power that the hybrid electrolysis plant needs to adjust when the frequency response conditions are met, thereby providing frequency regulation services.

[0059] According to some embodiments, a "response characteristic" of an electrolyzer refers to a characteristic that reflects the rate of change of the active power of the electrolyzer when the active power of the electrolyzer changes from one value to another.

[0060] According to some embodiments, "grid-connected active power" refers to the active power at the grid connection point, wherein the grid-connected active power is positive when the active power flows from the grid to the hybrid electrolysis plant, and the grid-connected active power is negative when the active power flows from the hybrid electrolysis plant to the grid.

[0061] According to some embodiments, "active power of the electrolyzer" refers to the active power consumed by the electrolyzer.

[0062] According to some embodiments, “active power of the energy storage unit” refers to the active power of the energy storage unit when it is charged or discharged, wherein when the energy storage unit is discharged, the active power of the energy storage unit is positive, and when the energy storage unit is charged, the active power of the energy storage unit is negative.

[0063] According to some embodiments, detecting the frequency disturbance of the power grid includes: detecting the frequency disturbance of the power grid based on at least one of the frequency of the power grid, the amount of change in the frequency of the power grid, and the rate of change in the frequency of the power grid. According to some embodiments of the present disclosure, the frequency disturbance of the power grid can be accurately detected.

[0064] According to some embodiments, the change in the frequency of the power grid is calculated based on the measured frequency of the power grid and the reference frequency of the power grid, that is, the difference between the measured frequency of the power grid and the reference frequency of the power grid. According to some embodiments, the rate of change of the frequency of the power grid can be calculated as the time derivative of the power system frequency, that is, RoCoF.

[0065] According to some embodiments, based on at least one of the frequency of the power grid, the amount of change in the frequency of the power grid, and the rate of change in the frequency of the power grid, detecting a frequency disturbance of the power grid includes at least one of the following: detecting that the frequency of the power grid is lower than a first frequency threshold; detecting that the frequency of the power grid is higher than a second frequency threshold; detecting that the amount of change in the frequency of the power grid is greater than a change amount threshold; and detecting that the rate of change in the frequency of the power grid is greater than a rate of change threshold. According to some embodiments, frequency disturbances may be detected according to different criteria.

[0066] According to some embodiments, in response to satisfying the frequency response condition, determining the frequency response power includes: in response to satisfying the frequency response condition at the response start time, determining a response curve of the frequency response power according to at least one of a received frequency regulation service instruction or a frequency of the power grid, wherein the response curve of the frequency response power changes the total committed power within the total ramp time; and determining the frequency response power based on the response curve of the frequency response power and the time elapsed from the response start time. According to some embodiments, different types of power grid frequency regulation services can be implemented according to at least one of the received frequency regulation service instruction and the power grid frequency.

[0067] According to some embodiments, the grid frequency regulation service provided by the hybrid electrolysis plant may be of different time scales.

[0068] According to some embodiments, "response start time" refers to the time when the frequency response starts, that is, the time when the frequency response condition is satisfied.

[0069] According to some embodiments, "total committed power" refers to the power that a hybrid electrolysis plant is committed to adjust according to the contract.

[0070] According to some embodiments, the “total ramp duration” refers to the duration over which the active power of the hybrid electrolysis plant changes the total committed power.

[0071] Figure 3 is a schematic diagram showing a response curve 301 of frequency response power.

[0072] At time t0, the hybrid electrolysis plant is in a normal working mode, and the active power of the hybrid electrolysis plant is Pnor.

[0073] At time t1, the frequency response service starts and the active power of the hybrid electrolyzer starts to change from Pnor.

[0074] At time t2, the active power of the hybrid electrolysis plant is reduced by the total committed power Pcom after a total ramp time d1 after time t1.

[0075] According to some embodiments, the response characteristic of the electrolyzer includes the rate of change of the active power of the electrolyzer. It should be understood that the response characteristic of the electrolyzer may include other similar parameters that can reflect the response speed of the active power of the electrolyzer, for example, the time it takes for the output power of the electrolyzer to change from one value to another.

[0076] Figure 4 is a diagram showing some embodiments of the present disclosure Figure 2 The process of allocating frequency-responsive power to electrolyzers and storage units in Figure 2 According to some embodiments, step 220 includes:

[0077] S401: Setting a first committed power based at least in part on the total committed power, wherein the first committed power is allocated to the electrolyzer, and a response curve of the active power of the electrolyzer changes the first committed power at a rate of change of the active power of the electrolyzer during the electrolyzer tilting time.

[0078] According to some embodiments, the total committed power can be allocated to the electrolyzer, thereby simplifying the control mechanism. According to some embodiments, the total committed power can be allocated between the electrolyzer and the energy storage unit, wherein the first committed power is allocated to the electrolyzer and the second committed power is allocated to the energy storage unit.

[0079] According to some embodiments, the allocation of the total committed power can be performed based on the electricity price of the power grid and / or the energy storage capacity (State of Charge, SOC) of the energy storage unit. According to some embodiments, setting the first committed power based at least in part on the total committed power includes at least one of the following: in response to the electricity price of the power grid being greater than an electricity price threshold, setting the first committed power based on the total committed power and the electricity price of the power grid; and in response to the energy storage capacity of the energy storage unit being less than the energy storage threshold, setting the first committed power to the total committed power. According to some embodiments of the present disclosure, the economic efficiency of the hybrid electrolysis plant and / or the balance of the SOC of the energy storage unit can be achieved.

[0080] S402: Determine a second committed power based on the total committed power and the first committed power, wherein the second committed power is allocated to the energy storage unit.

[0081] According to some embodiments, the second committed power is set to the difference between the total committed power and the first committed power. According to other embodiments, the second committed power may be set to be greater than the difference between the total committed power and the first committed power, thereby ensuring that the hybrid electrolysis plant meets the frequency response requirements while taking into account measurement deviations and control deviations.

[0082] S403: Determine the change rate of the grid-connected active power based on the total committed power and the total tilt duration.

[0083] The rate of change of the grid-connected active power is the slope of the grid-connected active power within the total ramping duration (for example, the duration from time t1 to time t2).

[0084] S404: Determine a response curve of the active power of the energy storage unit based on the change rate of the grid-connected active power, the total tilt duration, the change rate of the active power of the electrolyzer, the tilt duration of the electrolyzer and the second committed power.

[0085] As mentioned above, the rate of change of the active power of the electrolyzer is smaller than the rate of change of the frequency response power. Therefore, the electrolyzer tilting duration, that is, the duration of the active power of the electrolyzer changing the first committed power, is usually longer than the total tilting duration. Therefore, the demand for energy storage units may be different in the following three stages of the frequency response service: 1) The first stage from the moment of response start to the moment when the grid-connected active power changes the total committed power; 2) The second stage from the moment when the grid-connected active power changes the total committed power to the moment when the active power of the electrolyzer changes the first committed power; 3) The third stage from the moment when the active power of the electrolyzer changes the first committed power to the moment when the frequency response service ends.

[0086] According to some embodiments, determining a response curve of the active power of the energy storage unit based on the change rate of the grid-connected active power, the total tilt duration, the change rate of the active power of the electrolyzer, the electrolyzer tilt duration, and the second committed power includes:

[0087] Determine a first change rate of the active power of the energy storage unit based on the change rate of the active power of the electrolyzer and the change rate of the grid-connected active power, wherein the first change rate is the change rate of the active power of the energy storage unit starting from the response start time within the total tilt duration;

[0088] Determine a second change rate of the active power of the energy storage unit based on the change rate of the active power of the electrolyzer, wherein the second change rate is the change rate of the active power of the energy storage unit starting from the response start time and after the total tilting time but within the electrolyzer tilting time; and

[0089] A response curve of the active power of the energy storage unit is determined based on the total tilting time, the electrolyzer tilting time, the first change rate and the second change rate of the active power of the energy storage unit, and the second committed power.

[0090] According to some embodiments, the first change rate of the active power of the energy storage unit is the change rate of the first stage of the above-mentioned frequency response service, wherein the first change rate can be set to the difference between the change rate of the grid-connected active power and the change rate of the active power of the electrolyzer, or can be set to be greater than the difference between the change rate of the grid-connected active power and the change rate of the active power of the electrolyzer, so that the hybrid electrolysis plant can provide a faster frequency response.

[0091] According to some embodiments, the second change rate of the active power of the energy storage unit is the change rate of the second stage of the above-mentioned frequency response service, wherein the second change rate can be set to the negative value of the change rate of the active power of the electrolyzer, or can be set to a negative value less than the change rate of the active power of the electrolyzer, thereby ensuring that the hybrid electrolysis plant meets the frequency response requirements while taking into account the measurement deviation and the control deviation.

[0092] S405: Setting the active power of the energy storage unit based on the response curve of the active power of the energy storage unit and the time elapsed from the response start time.

[0093] According to some embodiments, when determining the response curve of the active power of the energy storage unit, the functional relationship between the active power of the energy storage unit and the time elapsed from the response start time may also be determined.

[0094] Figure 5A-5B is a schematic diagram showing the distribution of frequency response power to the electrolyzer and the energy storage unit. Figure 5A-5B In the figure, curve 301 is the response curve of the frequency response power, curve 302 is the response curve of the active power of the electrolyzer, curve 303 is the response curve of the active power of the energy storage unit, d1 is the total tilting time, d2 is the tilting time of the electrolyzer, Pnom is the grid-connected active power in the normal operating mode, and Pcom is the total committed power.

[0095] Figure 5A It shows the case where the total committed power is equal to the first committed power (for example, when the storage amount of the energy storage unit is lower than the storage threshold), so curve 301 (i.e., the response curve of the frequency response power) and curve 302 (i.e., the response curve of the active power of the energy storage unit) overlap each other in a stable state (i.e., after time t3).

[0096] Among them, at time t0, the hybrid electrolysis plant is in normal working mode, the active power of the hybrid electrolysis plant is Pnor, and the active power of the energy storage unit is zero. It should be understood that the active power of the energy storage unit can be a non-zero value. For example, when the electricity price at time t0 is greater than the electricity price threshold, the energy storage unit can be discharged at the active power Pen at time t0, and the active power of the energy storage unit during the frequency response service can be adjusted based on this non-zero value.

[0097] At time t1, the frequency response service is started, and the active power of the hybrid electrolysis plant starts to change from Pnor, wherein the first change rate of the energy storage unit can be calculated based on the change rate of the grid-connected active power and the change rate of the electrolyzer active power, so that the energy storage unit increases its output power to meet the requirements of the frequency response service.

[0098] At time t2, the active power of the hybrid electrolysis plant is reduced by the total committed power Pcom after the total tilt time d1 after time t1, but the reduction in the active power of the electrolyzer has not yet reached the total committed power Pcom, wherein the second change rate of the energy storage unit can be calculated based on the change rate of the active power of the electrolyzer, so that the energy storage unit continues to compensate for the difference between the change in the active power of the electrolyzer and the total committed power.

[0099] At time t3, the reduction in active power of the hybrid electrolysis plant and the reduction in active power of the electrolyzer have both reached the total committed power, and the active power of the energy storage unit is restored to zero.

[0100] At time t4, the reduction in active power of the hybrid electrolysis plant and the reduction in active power of the electrolyzer both maintain the total committed power, and the active power of the energy storage unit remains zero.

[0101] Figure 5B It shows the case where the total committed power is not equal to the first committed power (for example, when the grid electricity price is greater than the price threshold), therefore, curve 301 (i.e., the response curve of the frequency response power) and curve 302 (i.e., the response curve of the active power of the energy storage unit) do not overlap each other in a stable state (i.e., after time t3).

[0102] Among them, at time t0, the hybrid electrolysis plant is in normal working mode, the active power of the hybrid electrolysis plant is Pnor, and the active power of the energy storage unit is zero. It should be understood that the active power of the energy storage unit can be a non-zero value. For example, when the electricity price at time t0 is greater than the electricity price threshold, the energy storage unit can be discharged at the active power Pen at time t0, and the active power of the energy storage unit during the frequency response service can be adjusted based on this non-zero value.

[0103] At time t1, the frequency response service is started, and the active power of the hybrid electrolysis plant begins to change from Pnor, wherein the first change rate of the energy storage unit can be calculated according to the change rate of the grid-connected active power and the change rate of the electrolyzer active power, so that the energy storage unit increases its output power to meet the requirements of the frequency response service.

[0104] At time t2, the active power of the hybrid electrolysis plant changes the total committed power Pcom after the total ramp time d1 after time t1, but the reduction in the active power of the electrolyzer has not yet reached the first committed power Pcom1, wherein the second change rate of the energy storage unit can be calculated based on the change rate of the active power of the electrolyzer, so that the energy storage unit continues to compensate for the difference between the active power of the electrolyzer and the frequency response power.

[0105] At time t3, the reduction in active power of the hybrid electrolysis plant maintains the total committed power Pcom, the reduction in active power of the electrolyzer reaches the first committed power Pcom1, and the active power of the capacitor is reduced to the second committed power Pcom2.

[0106] At time t4, the reduction in active power of the hybrid electrolysis plant maintains the total committed power Pcom, the reduction in active power of the electrolyzer maintains the first committed power Pcom1, and the reduction in active power of the energy storage unit maintains the second committed power Pcom2.

[0107] According to some embodiments, the frequency response service ends when the frequency disturbance ends and / or the grid control center requires the hybrid electrolysis plant to stop the frequency response service.

[0108] According to some embodiments, the method for operating a hybrid electrolysis plant further includes: in response to satisfying a restoration condition at a restoration start time, determining a frequency response power based on a restoration curve of the frequency response power, wherein the restoration condition includes at least one of the following: detecting that a support duration has passed after the response start time; receiving an end service instruction; and detecting that the frequency of the power grid is within a restoration frequency range, wherein the restoration curve of the frequency response power is restored to the grid-connected active power of the hybrid electrolysis field at the response start time at a power restoration change rate starting from the restoration start time, and / or, is restored to the grid-connected active power of the hybrid electrolysis field at the response start time within the restoration duration. According to some embodiments of the present disclosure, the termination of the frequency response service may be performed, wherein the frequency response power may be determined based on the restoration curve of the frequency response power, thereby satisfying the requirements of the power grid operator for termination of the frequency response service.

[0109] According to some embodiments, a "restore condition" is a condition that determines whether to restore from frequency response service to a normal operating mode.

[0110] According to some embodiments, the "recovery start time" refers to the time elapsed from when the hybrid electrolysis plant starts to recover from the frequency response (ie, the time when the recovery conditions are met).

[0111] According to some embodiments, after the frequency response power is determined according to a recovery curve of the frequency response power, the frequency response power is distributed to the electrolyzer and the energy storage unit, thereby adjusting the grid-connected active power of the hybrid electrolysis plant according to the frequency response power.

[0112] Figure 6A-6B is a schematic diagram showing the distribution of frequency response power to the electrolyzer and the energy storage unit. Figure 5A-5B Similar, in Figure 6A-6B In the figure, curve 301 is the response curve of the frequency response power, curve 302 is the response curve of the electrolyzer active power, curve 303 is the response curve of the energy storage unit active power, d1 is the total tilting time, d2 is the electrolyzer tilting time, Pnom is the grid-connected active power in the normal operating mode, and Pcom is the total committed power.

[0113] When the total committed power is equal to the first committed power, the frequency response power is allocated to the electrolyzer, so that the active power of the electrolyzer is equal to the frequency response power. Fig. 6A It shows a case where the frequency response power is distributed to the electrolyzer and the energy storage unit when the total committed power is equal to the first committed power.

[0114] Fig. 6A and Figure 5A The difference is that the hybrid electrolysis plant resumes from frequency response service from time t4.

[0115] From time t4 to time t5, curves 301 and 302 overlap each other, that is, the active power of the electrolyzer is equal to the frequency response power, and curve 303 remains zero, that is, the active power of the energy storage unit remains zero.

[0116] At time t5, the active power of the electrolyzer and the active power of the hybrid electrolysis plant have been restored to Pnom, and the hybrid electrolysis plant has recovered from the frequency response service.

[0117] If the total committed power is not equal to the first committed power, the frequency response power is allocated between the electrolyzer and the energy storage unit. Figure 6B It is shown that the frequency response power is distributed to the electrolyzer and the energy storage unit when the total committed power is not equal to the first committed power.

[0118] Figure 6B and Figure 5B The difference is that the hybrid electrolysis plant resumes from frequency response service from time t4.

[0119] From time t4 to time t5, curves 301 and 302 do not overlap, that is, the active power of the electrolyzer is not equal to the frequency response power, and curve 303 tilts from Pcom2 to zero, that is, the active power of the energy storage unit tilts from Pcom2 to zero.

[0120] At t5, the active power of the electrolyzer and the active power of the hybrid electrolysis plant have been restored to Pnom, the active power of the energy storage unit has been restored to zero, and the hybrid electrolysis plant has been restored from the frequency response service.

[0121] According to some embodiments, Figure 5A-5B and Figure 6A-6B The frequency response of the hybrid electrolysis plant shown in should be considered as the minimum required performance and the actual frequency response of the hybrid electrolysis plant with integrated energy storage can reach the promised frequency response power and the ramp duration is better than Figure 5A-5B and Figure 6A-6B The one shown in is shorter.

[0122] According to some embodiments, the hybrid electrolysis plant can provide frequency response services to the grid through an Automatic Generation Control (AGC) system, which is a control function of the grid control center for adjusting the power output of generators and flexible loads so that an acceptable grid frequency can be maintained under normal or abnormal grid frequency conditions to cope with fluctuations in loads and variable energy sources. According to some embodiments, the hybrid electrolysis plant can accurately track the AGC control signal and optimize the response of the electrolyzer and energy storage unit based on the grid's electricity price and hydrogen production requirements and other constraints.

[0123] As an illustrative example, Figure 7A-7B is a schematic diagram showing the frequency responsive power distribution to the electrolyzer and the energy storage unit.

[0124] At time t0, the active power of the hybrid electrolysis plant is Pact0, the active power of the electrolyzer is Pact0, and the active power of the energy storage unit is zero, which means that no power compensation of the energy storage unit is required at time t0.

[0125] At time t1 , in response to the active power of the hybrid electrolysis plant decreasing to Pact1 , the active power of the electrolyzer is also decreased to Pact1 , while the active power of the energy storage unit remains zero.

[0126] At time t2, in response to the active power of the hybrid electrolysis plant being reduced to Pact2, the active power of the electrolyzer remains unchanged, while the energy storage unit is discharged at Psto, which is equivalent to reducing the active power of the hybrid electrolysis plant.

[0127] At time t3, in response to the active power of the hybrid electrolysis plant increasing to Pact3, the active power of the energy storage unit becomes zero, which means that the energy storage unit stops discharging to compensate for the active power of the hybrid electrolysis plant, and the active power of the electrolyzer becomes the active power Pact3 of the hybrid electrolysis plant.

[0128] According to some embodiments, the method for operating a hybrid electrolysis plant further includes: in response to the frequency response condition not being met after the hybrid electrolysis plant is started or the frequency response power is restored to the grid-connected active power of the hybrid electrolysis plant at the time of response start, setting the active power of the energy storage unit according to at least one of the electricity price of the grid, the hydrogen demand of the hybrid electrolysis plant, and the storage capacity of the energy storage unit. According to some embodiments, the hybrid electrolysis plant has operational flexibility and can optimize the hydrogen production and charging / discharging of the integrated energy storage system according to available information on market energy prices and / or energy storage status of the energy storage unit.

[0129] For example, during periods of low electricity prices and low hydrogen demand, the planned demand can be maintained by charging the energy storage unit. Similarly, during periods of high electricity prices and high hydrogen demand, the planned demand can be maintained by releasing the energy storage unit.

[0130] According to some embodiments, the energy storage unit includes a battery and a supercapacitor. According to some embodiments, allocating the frequency response power to the electrolyzer and the energy storage unit further includes: in response to the support duration corresponding to the frequency response condition being less than a duration threshold, allocating the active power of the energy storage unit to the supercapacitor; and in response to the support duration corresponding to the frequency response condition being greater than or equal to the duration threshold, allocating the active power of the energy storage unit to the battery.

[0131] According to some embodiments, "support duration" refers to the duration of the frequency response service, e.g. Figure 6A-6B The duration from time t1 to time t5.

[0132] According to some embodiments, the active power of the energy storage unit may be allocated to different types of energy storage units according to the support duration.

[0133] Currently, it is expected that the hybrid electrolysis plant maintains hydrogen production during periods of low grid voltage caused by grid faults. The hybrid electrolysis plant exhibits low voltage ride through (LVRT) with the support of an energy storage unit. According to some embodiments, the method for operating a hybrid hydrogen production plant further includes: in response to detecting that the voltage at the grid connection point is lower than the LVRT threshold, reducing the active power of the electrolyzer to the lower limit of the active power of the electrolyzer, and setting the active power of the energy storage unit to the active power of the electrolyzer; and setting the grid-connected reactive power of the hybrid electrolysis plant based on the voltage of the grid.

[0134] According to some embodiments, the energy storage unit provides active power to the electrolyzer, maintains the operation of the electrolyzer, ensures the reliability of the electrolyzer, and avoids an excessively long restart time of the electrolyzer; reduces the active power of the electrolyzer to a lower limit, thereby reducing the energy consumption of the energy storage unit; and the hybrid electrolysis plant provides reactive power to the power grid to support the power grid.

[0135] According to some embodiments, the method for operating a hybrid hydrogen production plant further includes: in response to detecting that the voltage at the grid connection point is lower than a first voltage threshold or higher than a second voltage threshold, setting the grid-connected reactive power of the hybrid electrolysis plant based on the voltage of the grid, wherein the first voltage threshold is less than the second voltage threshold. According to some embodiments of the present disclosure, the hybrid electrolysis plant can provide reactive power services relative to the voltage.

[0136] According to some embodiments, the method for operating a hybrid hydrogen production plant further includes: in response to detecting that the power factor at the grid connection point is lower than a power factor threshold, setting the grid-connected reactive power of the hybrid electrolysis plant to compensate for the power factor at the grid connection point. According to some embodiments of the present disclosure, the hybrid electrolysis plant can provide high power factor operation.

[0137] According to yet another aspect of the present disclosure, a computer-readable storage medium is provided, on which computer-readable instructions are stored. When the computer-readable instructions are executed by a processor, the processor is caused to perform any method for operating a hybrid electrolysis plant as described in the present disclosure.

[0138] According to yet another aspect of the present disclosure, a computer program product is provided. The computer program product comprises instructions, which, when executed by a computer, cause the computer to perform the method for operating a hybrid electrolysis plant as described in the present disclosure.

[0139] Reference now Figure 8 , shows a high-level diagram of an exemplary computing device 800 that can be used according to the systems and methods disclosed herein. The computing device 800 includes at least one processor 802 that executes instructions stored in a memory 804. For example, the instructions can be instructions for implementing the functions described as being performed by one or more components described above or instructions for implementing one or more methods described above. The processor 802 can access the memory 804 through a system bus 806.

[0140] The computing device 800 also includes a data storage device 808 that can be accessed by the processor 802 through the system bus 806. The data storage device 808 can include executable instructions, log data, etc. The computing device 800 also includes an input interface 810 that allows external devices to communicate with the computing device 800. For example, the input interface 810 can be used to receive instructions from an external computer device, from a user, etc. The computing device 800 also includes an output interface 812 that interfaces the computing device 800 with one or more external devices. For example, the computing device 800 can display text, images, etc. through the output interface 812.

[0141] It is contemplated that external devices that communicate with the computing device 800 via the input interface 810 and the output interface 812 may be included in an environment that provides substantially any type of user interface with which a user can interact. Examples of user interface types include graphical user interfaces, natural user interfaces, and the like. For example, a graphical user interface may accept input from a user using (multiple) input devices such as a keyboard, a mouse, a remote control, and provide output on an output device such as a display. In addition, a natural user interface may enable a user to interact with the computing device 800 in a manner that is not constrained by input devices such as a keyboard, a mouse, a remote control, and the like. In contrast, a natural user interface may rely on speech recognition, touch and stylus recognition, gesture recognition on and near the screen, air gestures, head and eye tracking, voice and sound, vision, touch, gestures, machine intelligence, and the like.

[0142] In addition, although shown as a single system, it should be understood that the computing device 800 can be a distributed system. Thus, for example, several devices can communicate via a network connection and can jointly perform the tasks described as being performed by the computing device 800.

[0143] The various functions described herein can be implemented with hardware, software or any combination thereof. If implemented with software, the function can be stored or transmitted as one or more instructions or codes on a computer-readable medium. Computer-readable media include computer-readable storage media. Computer-readable storage media can be any available storage medium that can be accessed by a computer. As an example and not limitation, such computer-readable storage media can include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, disk storage or other magnetic storage devices, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer. The disks and optical disks used here include compact disks (CDs), laser disks, optical disks, digital versatile disks (DVDs), floppy disks and blue optical disks (BDs), wherein disks usually reproduce data magnetically, and optical disks usually reproduce data optically with lasers. In addition, propagation signals are not included in the scope of computer-readable storage media. Computer-readable media also include communication media, which include any media that facilitates the transmission of computer programs from one place to another. For example, the connection can be a communication medium. For example, if the software is transmitted from a website, server or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio and microwave, the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio and microwave are included in the definition of communication media. Combinations of the above should also be included within the scope of computer-readable media. It should be understood that the computer program product can be stored on a non-transitory computer-readable storage medium and can also be downloaded via a communication medium.

[0144] The flow charts and block diagrams in the accompanying drawings illustrate the possible structures, functions and operations of the systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flow chart or block diagram may represent a part of a module, a program segment or a code, and a part of the module, a program segment or a code includes one or more executable instructions for implementing a logical function. It should also be noted that in some alternative embodiments, the functions marked in the blocks may also appear in an order different from the order marked in the accompanying drawings. For example, depending on the functions involved, two blocks displayed continuously may actually be executed substantially in parallel, or they may sometimes be executed in reverse order. It should also be noted that each block in the block diagram and / or flow chart and the combination of the blocks in the block diagram and / or flow chart may be implemented by a dedicated hardware-based system that performs a function or operation, or may be implemented by a combination of dedicated hardware and computer instructions.

[0145] The above description is only an explanation of the preferred embodiments of the present disclosure and the technical principles applied. Those skilled in the art should understand that, without departing from the aforementioned inventive concept, the scope of the present disclosure involved in the embodiments of the present disclosure is not limited to the technical solution formed by the combination of the aforementioned technical features, and should also cover other technical solutions formed by any combination of the aforementioned technical features or their equivalent features. For example, a technical solution formed by replacing the above features with technical features having similar functions to the technical features disclosed in the embodiments of the present disclosure (but not limited thereto) also falls within the scope of the present disclosure.

Claims

1. A method (200) for operating a hybrid electrolysis plant (100), wherein: The hybrid electrolysis plant (100) comprises an electrolyser (101) and an energy storage unit (102), and the hybrid electrolysis plant (100) is coupled to a grid (110) at a grid connection point (120), and the method comprises: In response to satisfying a frequency response condition, determining (S210) a frequency response power, wherein the frequency response condition includes at least one of the following: receiving a frequency regulation service instruction from a power grid control center of the power grid; and detecting a frequency disturbance in the power grid; and Based at least in part on the response characteristics of the electrolyzer, the frequency response power is allocated (S220) to the electrolyzer and the energy storage unit so that the grid-connected active power of the hybrid electrolysis plant is adjusted according to the frequency response power.

2. The method according to claim 1, wherein: In response to satisfying the frequency response condition, determining (S210) the frequency response power comprises: In response to the frequency response condition being met at a response start time, determining a response curve of the frequency response power according to at least one of the received frequency regulation service instruction or the frequency of the power grid, wherein the response curve of the frequency response power changes a total committed power within a total tilting time; and The frequency response power is determined based on a response curve of the frequency response power and a time elapsed from a moment when the response is initiated.

3. The method according to claim 2, wherein: The response characteristic of the electrolyzer includes the rate of change of the active power of the electrolyzer, and The allocating (S220) the frequency response power to the electrolyzer and the energy storage unit includes: setting a first committed power based at least in part on the total committed power, wherein the first committed power is allocated to the electrolyzer and a response curve of the active power of the electrolyzer changes the first committed power at a rate of change of the active power of the electrolyzer during an electrolyzer ramp duration; Based on the total committed power and the first committed power, determining (S402) a second committed power, wherein the second committed power is allocated to the energy storage unit; Based on the total committed power and the total tilt duration, determining (S403) a rate of change of the grid-connected active power; Determining (S404) a response curve of the active power of the energy storage unit based on the change rate of the grid-connected active power, the total tilt duration, the change rate of the active power of the electrolyzer, the electrolyzer tilt duration, and the second committed power; and Based on the response curve of the active power of the energy storage unit and the time elapsed from the response start time, the active power of the energy storage unit is set (S405).

4. The method according to claim 3, wherein: The setting (S401) of the first committed power based at least in part on the total committed power comprises at least one of the following: In response to the electricity price of the power grid being greater than an electricity price threshold, setting the first committed power based on the total committed power and the electricity price of the power grid; and In response to the energy storage amount of the energy storage unit being lower than an energy storage threshold, the first committed power is set to the total committed power.

5. The method according to claim 3, wherein: The step of determining (S404) a response curve of the active power of the energy storage unit based on the change rate of the grid-connected active power, the total tilt duration, the change rate of the active power of the electrolyzer, the electrolyzer tilt duration, and the second committed power includes: Determine a first change rate of the active power of the energy storage unit based on the change rate of the active power of the electrolyzer and the change rate of the grid-connected active power, wherein the first change rate is the change rate of the active power of the energy storage unit starting from the response start time within the total tilt duration; Determine a second change rate of the active power of the energy storage unit based on the change rate of the active power of the electrolyzer, wherein the second change rate is the change rate of the active power of the energy storage unit starting from the response start time and having passed the total tilting time but within the electrolyzer tilting time; and A response curve of the active power of the energy storage unit is determined based on the total tilting time, the electrolyzer tilting time, the first change rate and the second change rate of the active power of the energy storage unit, and the second committed power.

6. The method according to any one of claims 2 to 5, further comprising: In response to a recovery condition being met at a recovery start time, the frequency response power is determined based on a recovery curve of the frequency response power, wherein the recovery condition includes at least one of the following: Detecting that a support duration has elapsed after the response initiation moment; Receiving an end-of-service instruction; and It is detected that the frequency of the power grid is within the recovery frequency range, Among them, the recovery curve of the frequency response power recovers to the grid-connected active power of the hybrid electrolysis plant at the response start time at the power recovery change rate starting from the recovery start time, and / or recovers to the grid-connected active power of the hybrid electrolysis plant at the response start time within the recovery time.

7. The method according to any one of claims 1 to 6, wherein: The detecting of the frequency disturbance of the power grid comprises: A frequency disturbance of the power grid is detected based on at least one of a frequency of the power grid, an amount of change in the frequency of the power grid, and a rate of change in the frequency of the power grid.

8. The method according to claim 7, wherein: The detecting the frequency disturbance of the power grid based on at least one of the frequency of the power grid, the amount of change of the frequency of the power grid, and the rate of change of the frequency of the power grid comprises at least one of the following: detecting that the frequency of the power grid is lower than a first frequency threshold; detecting that the frequency of the power grid is higher than a second frequency threshold; It is detected that the change in the frequency of the power grid is greater than a change threshold; as well as It is detected that a rate of change of the frequency of the power grid is greater than a rate of change threshold.

9. The method according to claim 6, further comprising: In response to the frequency response condition not being met after the hybrid electrolysis plant is started or the frequency response power is restored to the grid-connected active power of the hybrid electrolysis plant at the response start-up time, the active power of the energy storage unit is set according to at least one of the electricity price of the grid, the hydrogen demand of the hybrid electrolysis plant and the storage capacity of the energy storage unit.

10. The method according to claim 3, wherein: The energy storage unit includes a battery and a supercapacitor, and wherein the allocating the frequency response power to the electrolyzer and the energy storage unit further includes: In response to a support duration corresponding to the frequency response condition being less than a duration threshold, allocating active power of the energy storage unit to the supercapacitor; and In response to the support duration corresponding to the frequency response condition being greater than or equal to the duration threshold, the active power of the energy storage unit is allocated to the battery.

11. The method according to any one of claims 1 to 10, further comprising: In response to detecting that the voltage at the grid connection point is lower than a low voltage ride-through threshold, reducing the active power of the electrolyzer to a lower active power limit of the electrolyzer, and setting the active power of the energy storage unit to the active power of the electrolyzer; as well as Based on the voltage of the power grid, the grid-connected reactive power of the hybrid electrolysis plant is set.

12. The method according to any one of claims 1 to 11, further comprising: In response to detecting that the voltage of the grid connection point is lower than a first voltage threshold or higher than a second voltage threshold, the grid-connected reactive power of the hybrid electrolysis plant is set based on the voltage of the grid, wherein the first voltage threshold is lower than the second voltage threshold.

13. The method according to any one of claims 1 to 11, further comprising: In response to detecting that the power factor of the grid connection point is lower than a power factor threshold, the grid-connected reactive power of the hybrid electrolysis plant is set based on the power factor of the grid.

14. A hybrid electrolysis plant, the hybrid electrolysis plant being coupled to a power grid, the hybrid electrolysis plant comprising: Electrolyzer; Energy storage unit; as well as A plant controller, the plant controller being configured to execute the method according to any one of claims 1-13.

15. A computer-readable storage medium having computer-readable instructions stored thereon, which, when executed by a processor, cause the processor to perform the method according to any one of claims 1-13.

16. A computer program product comprising instructions which, when executed by a computer, cause the computer to perform the method according to any one of claims 1 to 13.

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