Method for operating an electrical-hydrogen coupling system and electrical-hydrogen coupling system

Abstract

The application provides an operation control method of an electricity-hydrogen coupling system and the electricity-hydrogen coupling system, and relates to the technical field of new energy power generation. The application obtains predicted related parameters corresponding to power station power and power station power instruction related parameters, aims to be optimal in economy, meets the demand of power grid power interaction restriction, obtains power station power adjustment instructions and electrolytic cell power adjustment instructions corresponding to each moment. The application realizes real-time matching of system dynamic adjustment characteristics through operation control of new energy and hydrogen production modules, so that different power grid power interaction restriction demands are met, and high economy is realized.

Description

Technical Field

[0001] This application relates to the field of new energy power generation technology, and in particular to an operation control method and an electro-hydrogen coupling system. Background Technology

[0002] Currently, with the rapid development of new energy sources, the power system is facing unprecedented challenges. The large-scale integration of new energy sources has placed enormous pressure on the power grid, requiring not only effective regulation of supply and demand balance but also ensuring the safe and stable operation of the grid. To achieve the orderly and healthy development of new energy sources, various regions have introduced supporting policies and management measures.

[0003] In some regions, requirements for new energy development projects are becoming increasingly stringent. For example, one region requires newly developed energy sources to be paired with a hydrogen production system of a certain scale to achieve self-consumption, prohibiting the transmission of excessive electricity to the grid. Specifically, only 20% of the electricity is allowed to be fed into the grid, with the remainder used for hydrogen production or self-consumption. Similarly, some independently developed photovoltaic power plants are also required to achieve complete self-consumption, prohibiting the transmission of electricity to the grid. These restrictive requirements aim to guide new energy projects towards a more sustainable and green direction, while alleviating pressure on the power grid.

[0004] However, current regulations restrict the grid connection and disconnection of electricity generated by electro-hydrogen coupling systems, while lacking effective operation and management strategies. From the perspective of matching and coupling between electricity and hydrogen, a unified dynamic management system has not yet been established, failing to fully utilize the characteristics of new energy sources and hydrogen production systems. Therefore, research and innovation in operation and management strategies for electro-hydrogen coupling systems are imperative. Summary of the Invention

[0005] This disclosure provides an operation control method and an electro-hydrogen coupling system, which aims to at least address the problem that, from the perspective of matching and coupling between hydrogen atoms, a unified dynamic management system has not yet been formed in related technologies.

[0006] The first aspect of this application proposes an operation control method for an electro-hydrogen coupling system, including:

[0007] S1, obtain the prediction-related parameters and power command-related parameters corresponding to the power plant power. The prediction-related parameters include the prediction period T1 and the rolling period T2. The power command-related parameters include the power plant power command transmission delay T3, where T1>T3.

[0008] S2. Based on the measured power of the power plant at time t, the measured power of the electrolyzer at time t, and the power prediction sequence of the power plant in the time period from t to t+T1, with the goal of optimal economic efficiency and at the same time meeting the power grid interaction restriction requirements, obtain the first electrolyzer power setting value sequence and the power plant power setting value sequence in the time period from t to t+T1.

[0009] S3, within the time period t to t+T3, issues power regulation instructions for the power station according to the power station setpoint sequence, and obtains the power station measured value sequence within the time period t to t+T3;

[0010] S4. Based on the power measurement sequence of the power plant during the time period t to t+T3, the power setpoint sequence of the first electrolyzer during the time period t to t+T1, and the power setpoint sequence of the power plant during the time period t to t+T1, determine the power setpoint sequence of the second electrolyzer during the time period t to t+T3.

[0011] S5. Based on the measured power value sequence of the power plant during the time period t to t+T3, the power set value sequence of the second electrolyzer during the time period t to t+T3, and the power set value sequence of the first electrolyzer during the time period t to t+T1, determine the electrolyzer power adjustment command sequence for the time period t to t+T3, and issue the electrolyzer power adjustment command according to the electrolyzer power adjustment command sequence during the time period t to t+T3.

[0012] S6, obtain the sequence of measured electrolytic cell power values ​​within the time period t to t+T3;

[0013] S7, at time t+T3, update the power setpoint sequence of the first electrolyzer in the time period t to t+T1 and the power setpoint sequence of the power plant in the time period t to t+T3 based on the power measured value sequence of the power plant in the time period t to t+T3 and the power measured value sequence of the electrolyzer in the time period t to t+T3.

[0014] S8, take time t+T3 as the new t, repeat the above S3 to S7 until time t+T2, update t, repeat the above S2 to S7 to obtain the power plant power regulation command and electrolyzer power regulation command corresponding to each time.

[0015] According to one embodiment of this application, the prediction-related parameters also include prediction accuracy and prediction value resolution; the power plant power command-related parameters also include the power plant power command transmission cycle, and the command issuance cycle of the electrolyzer power adjustment command is not greater than the power plant power command transmission cycle.

[0016] According to one embodiment of this application, in S2, the revenue function corresponding to the goal of economic optimization is:

[0017] W = Max(R) H2 +R V -C H2 -C b -C dH2 )

[0018] In the above formula, W represents the total revenue, and R... H2 For the hydrogen production revenue of the electrolysis hydrogen production unit, R V C represents the electricity generation revenue of the electro-hydrogen coupling system when it is allowed to connect to the grid, or the penalty cost for connecting to the grid when it is not allowed to do so. H2 For the operation and maintenance costs of the electrolysis hydrogen production unit, C b C represents the grid disconnection cost when grid disconnection is permitted, or the grid disconnection penalty cost when grid disconnection is not permitted, for the electro-hydrogen coupling system. dH2 The power regulation cost of the electrolytic hydrogen production unit is related to the power regulation range.

[0019] According to one embodiment of this application, the calculation formulas for the various parameters involved in the profit function include:

[0020]

[0021]

[0022]

[0023]

[0024]

[0025]

[0026] η dH2 =[η dH2,1 ,…,η dH2,n1 ]

[0027] In the above formula, This is a sequence of power plant setpoints for the time period from t to t+T1. The sequence of power setpoints for the first electrolytic cell during the time period from t to t+T1;

[0028] In the above formula, η H2 It is the hydrogen-to-electric conversion efficiency of the electrolytic hydrogen production unit; The price of hydrogen during the time period from t to t+T1 is determined by market dynamics; T res,1 It is the resolution of the predicted value;

[0029] In the above formula, η E It refers to the efficiency of power transmission from the power plant to the grid, which is related to factors such as line losses; It refers to the feed-in tariff or penalty cost within the time period t to t+T1. The feed-in tariff is determined by market dynamics; the penalty cost is determined by the punitive actions triggered by feed-in.

[0030] In the above formula, η C,H2 It is the variable cost of hydrogen production by electrolysis; The fixed cost per unit time for hydrogen production by electrolysis is related to the depreciation rate; This is the rated hydrogen production power of the electrolytic hydrogen production unit;

[0031] In the above formula, It refers to the off-grid electricity price or penalty cost within the time period t to t+T1. The off-grid electricity price is determined by market dynamics, and the penalty cost is determined by the penalty actions caused by the off-grid operation.

[0032] In the above formula, η dH2 It is the cost of each adjustment during the electrolytic hydrogen production process from t to t+T1, and it is related to the power change during each adjustment.

[0033] According to one embodiment of this application, in S2, to achieve optimal economic efficiency while simultaneously meeting the grid power interaction restriction requirements, when obtaining the first electrolyzer power setpoint sequence within the time period t to t+T1 and the power plant power setpoint sequence within the time period t to t+T1, the following constraints must be met:

[0034] Each power setting value of the first electrolytic cell in the first electrolytic cell power setting value sequence is within a preset power range;

[0035] The power adjustment speed corresponding to each power setting value of the first electrolytic cell in the power setting value sequence is less than or equal to the maximum adjustment speed;

[0036] The electro-hydrogen coupling system is not allowed to meet the offline power and offline electricity limits when connecting to the network, or it is not allowed to meet the offline power and offline electricity limits when disconnecting from the network.

[0037] The prediction accuracy of each power station power setpoint in the power station power setpoint sequence meets the accuracy error range.

[0038] According to one embodiment of this application, each value in the power plant setpoint sequence within the time period t to t+T1 is less than or equal to the corresponding value in the power plant predicted value sequence within the time period t to t+T1.

[0039] According to one embodiment of this application, based on the measured power value sequence of the power plant during the time period t to t+T3, the power setpoint sequence of the second electrolyzer during the time period t to t+T3, and the power setpoint sequence of the first electrolyzer during the time period t to t+T1, a power adjustment command sequence for the electrolyzer during the time period t to t+T3 is determined, including:

[0040] Based on the power setting value sequence of the second electrolytic cell within the time period t to t+T3 and the power setting value sequence of the first electrolytic cell within the time period t to t+T1, determine the power adjustment instruction of each electrolytic cell in the power adjustment instruction subsequence of the first electrolytic cell;

[0041] Based on each electrolytic cell power adjustment instruction in the first electrolytic cell power adjustment instruction subsequence, the power plant measured value sequence within the time period t to t+T3, and the power set value sequence of the first electrolytic cell within the time period t to t+T1, determine each electrolytic cell power adjustment instruction in the second electrolytic cell power adjustment instruction subsequence;

[0042] The electrolytic cell power adjustment command subsequence is composed of the first electrolytic cell power adjustment command subsequence and the second electrolytic cell power adjustment command subsequence for the time period t to t+T3.

[0043] According to one embodiment of this application, based on the power setpoint sequence of the second electrolytic cell within the time period t to t+T3 and the power setpoint sequence of the first electrolytic cell within the time period t to t+T1, each electrolytic cell power adjustment instruction in the first electrolytic cell power adjustment instruction sub-sequence is determined, including:

[0044] Obtain multiple first moments corresponding to the sequence of power setpoints of the first electrolytic cell within the time period t to t+T1;

[0045] Obtain multiple second time points corresponding to the power setpoint sequence of the second electrolytic cell within the time period t to t+T3;

[0046] For each second moment, if there is no first moment that overlaps with the second moment, then the second electrolytic cell power setting value corresponding to the second moment is taken as the target adjustment power of the electrolytic cell corresponding to the second moment.

[0047] For each second moment, if there is a first moment that overlaps with the second moment, the average of the first electrolytic cell power setting value and the second electrolytic cell power setting value corresponding to the time overlap is obtained as the target adjustment power of the electrolytic cell corresponding to the time overlap.

[0048] Based on the first electrolyzer power setpoint sequence, prediction resolution and power command transmission cycle of the power plant within the time period t to t+T1, the target power adjustment speed of the electrolyzer at each second time point is calculated.

[0049] Based on the target adjustment power and target power adjustment speed of the electrolyzer corresponding to each second time point, generate each electrolyzer power adjustment instruction in the first electrolyzer power adjustment instruction subsequence.

[0050] A second aspect of this application provides an electro-hydrogen coupling system, comprising: an energy management module, a new energy power generation module, and an electrolysis hydrogen production module, wherein:

[0051] The energy management module includes an electro-hydrogen coupling control unit, a power plant power prediction unit, a power plant control unit, and an electrolysis hydrogen production control unit;

[0052] The electro-hydrogen coupling control unit is used to generate power regulation commands for the power plant and power regulation commands for the electrolyzer.

[0053] The power plant power prediction unit is used to predict the power of the power plant during the prediction period.

[0054] The power plant control unit is used to receive the power plant power regulation command sent by the electro-hydrogen coupling control unit and realize the control of the power plant power and real-time power transmission.

[0055] The electrolysis hydrogen production unit is used to receive the electrolyzer power adjustment command sent by the electro-hydrogen coupling control unit and to control the power of the electrolysis hydrogen production unit.

[0056] A third aspect of this application provides an electronic device, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor to implement the operation control method of the electro-hydrogen coupling system as described in the first aspect of this application.

[0057] A fourth aspect of this application provides a non-transitory computer-readable storage medium storing computer instructions, wherein the computer instructions are used to implement the operation control method of the electro-hydrogen coupling system as described in the first aspect of this application.

[0058] The fifth aspect of this application provides a computer program product, including a computer program that, when executed by a processor, implements the operation control method for the electro-hydrogen coupling system as described in the first aspect of this application.

[0059] The technical solutions provided by the embodiments of this disclosure bring at least the following beneficial effects: The embodiments of this application enable the real-time matching of the dynamic adjustment characteristics of the system through the operation and management of the new energy and hydrogen production modules in the system, thereby meeting the different power grid power interaction restriction requirements and achieving high economic efficiency.

[0060] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0061] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0062] Figure 1 This is a schematic diagram illustrating an exemplary implementation of an operation control method for an electro-hydrogen coupling system, as shown in one embodiment of this application.

[0063] Figure 2 This is a schematic diagram of an electro-hydrogen coupling system shown in one embodiment of this application.

[0064] Figure 3 This is a schematic diagram of an electronic device according to one embodiment of this application. Detailed Implementation

[0065] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0066] Figure 1 This is a schematic diagram of an exemplary embodiment of an operation control method for an electro-hydrogen coupling system shown in this application, as follows: Figure 1 As shown, the operation control method of this electro-hydrogen coupling system includes the following steps:

[0067] S1. Obtain the prediction-related parameters and power command-related parameters corresponding to the power plant power. The prediction-related parameters include the prediction period T1 and the rolling period T2. The power command-related parameters include the power plant power command transmission delay T3, where T1>T3.

[0068] Among them, the prediction-related parameters for power plant power include the prediction period T1 and the rolling period T2. In addition, the prediction-related parameters also include the prediction accuracy A and the prediction value resolution T. res，1 In this application, the prediction accuracy of the power plant's output is required to be no less than A. For example, A = 85-95%, T1 = 4h, T2 = 5min, T... res，1 =1s.

[0069] Among them, the power station power command related parameters include the power station power command transmission delay T3, that is, the implementation of the power station power regulation command has a delay of T3; in addition, the power station power command related parameters also include the power station power command transmission period T. res，2 Its characteristic is that T res，2 Not greater than T res，1 For example, T3 = 1~10s, T res，2 =1s.

[0070] In this application, the command issuance cycle of the electrolytic cell power adjustment command must not exceed the power plant power command transmission cycle T. res，2 In other words, the electrolysis hydrogen production control unit can operate at the same frequency as the power plant's real-time power transmission signal.

[0071] S2. Based on the measured power value of the power plant at time t, the measured power value of the electrolyzer at time t, and the power prediction value sequence of the power plant in the time period from t to t+T1, with the goal of optimal economic efficiency and at the same time meeting the power grid power interaction restriction requirements, obtain the power setting value sequence of the first electrolyzer in the time period from t to t+T1 and the power setting value sequence of the power plant in the time period from t to t+T1.

[0072] Obtain the measured power value P of the power plant at time t. V，t .

[0073] Obtain the measured value P of the electrolytic cell power at time t. H2,t .

[0074] Obtain the power prediction sequence of the power plant within the time period t to t+T1, where the number of power prediction values ​​n1 in the power prediction sequence within the time period t to t+T1 is n1 = T1 / T. res，1 .

[0075] Power sequence of the power plant at time t: in Measured power output of the power plant at any given time P V，t , These are predicted values.

[0076] Based on the measured power values ​​of the power plant at time t, the measured power values ​​of the electrolyzer at time t, and the predicted power value sequence of the power plant during the time period from t to t+T1, with the aim of optimal economic efficiency and simultaneously meeting the power grid power interaction constraint requirements, the sequence of the first electrolyzer power setpoint value during the time period from t to t+T1 is obtained. and the sequence of power plant setpoints during the time period t to t+T1

[0077] In this application, based on the principle of optimal system economy within the time period t to t+T1, the power of the electrolytic cell and the power plant are determined, while simultaneously meeting the constraints on electrolytic cell power regulation. Specifically, the following problem is solved:

[0078] The payoff function corresponding to the objective of economic optimization is:

[0079] W = Max(R) H2 +R V -C H2 -C b -CdH2 )

[0080] In the above formula, W represents the total revenue, and R... H2 For the hydrogen production revenue of the electrolysis hydrogen production unit, R V C represents the electricity generation revenue of the electro-hydrogen coupling system when it is allowed to connect to the grid, or the penalty cost for connecting to the grid when it is not allowed to do so. H2 For the operation and maintenance costs of the electrolysis hydrogen production unit, C b C represents the grid disconnection cost when grid disconnection is permitted, or the grid disconnection penalty cost when grid disconnection is not permitted, for the electro-hydrogen coupling system. dH2 The power regulation cost of the electrolytic hydrogen production unit is related to the power regulation range.

[0081] The optimization problem above is to find the maximum value of the above formula.

[0082] In this application, the calculation formulas for each parameter involved in the profit function include:

[0083]

[0084]

[0085]

[0086]

[0087]

[0088]

[0089] η dH2 =[η dH2,1 ,…,η dH2,n1 ]

[0090] In the above formula, This is a sequence of power plant setpoints for the time period from t to t+T1. This is the sequence of power setpoints for the first electrolytic cell during the time period from t to t+T1.

[0091] In the above formula, η H2 It is the hydrogen-to-electricity conversion efficiency of the electrolytic hydrogen production unit, generally η. H2 = 0.2 Nm3 / kWh; The price of hydrogen during the period from t to t+T1 is determined by market dynamics and is generally between 1.5 and 5 yuan / Nm3; T res,1 It is the resolution of the predicted value.

[0092] In the above formula, η E It is the efficiency of power transmission from the power plant to the grid, which is related to factors such as line losses, and is generally between 95-99%. It refers to the feed-in tariff or penalty cost within the time period t to t+T1. The feed-in tariff is determined by market dynamics and is generally 0.2-0.6 yuan / kWh. The penalty cost is determined by the penalty actions caused by feed-in, such as fines or tripping costs due to anti-reverse current devices.

[0093] In the above formula, η C,H2 The variable cost of hydrogen production via electrolysis is typically 0.01-0.02 yuan / kWh. The fixed cost per unit time for hydrogen production by electrolysis is related to the depreciation rate, which is generally 4% per year. This is the rated hydrogen production power of the electrolysis hydrogen production unit.

[0094] In the above formula, It refers to the off-grid electricity price or penalty cost during the time period from t to t+T1. The off-grid electricity price is determined by market dynamics and is generally 0.3-1.0 yuan / kWh. The penalty cost is determined by the penalty actions caused by off-grid disconnection, such as fines or the cost of tripping due to anti-reverse flow devices.

[0095] In the above formula, η dH2 This refers to the cost of each adjustment during the electrolytic hydrogen production process within the time period t to t+T1, which is related to the power change during each adjustment. Specifically:

[0096] η dH2 = c1×△w+c2×△Lv+c3×△Q+c4×△Q W +c5×△v

[0097] Where, η dH2 The cost of each adjustment is shown in Figure 1. Here, c1 is a coefficient considering the safety risks of gas post-treatment and gas mixing, and Δw represents the change in gas purity. c2 is a coefficient considering the increased safety risks due to liquid level differences, and ΔLv represents the change in liquid level differences. c3 is the cost coefficient for adjusting the alkali solution flow rate, and ΔQ represents the change in alkali solution flow rate. c4 is the cost coefficient for adjusting the cooling medium flow rate, and ΔQ represents the change in cooling medium flow rate. W The value represents the change in cooling medium flow rate, c5 is a coefficient considering valve operation costs, and Δv is the change in gas valve opening.

[0098] In the above formula, △w, △Lv, △Q, and △v are The function is used to optimize the relevant control parameters (pressure and valve opening and alkali flow rate) of the water electrolysis hydrogen production unit based on the control cost function at each adjustment (to achieve the lowest cost), and obtain the adjustment value of the relevant control parameters of the water electrolysis hydrogen production unit under the condition of maximizing the net benefit function value, and thus calculate the result.

[0099] △Lv=(kRT×v×(△t 11 ) 2 +V g,a (p-p0))(1 / Vg,a -2 / V g,c ) / ρg

[0100] in, N is the number of chambers in the electrolytic hydrogen production system, F is the Faraday constant, U is the chamber voltage (here, U is taken as a constant due to its low variation range, U = 1.6-2.0V), ρ is the electrolyte density, g is the acceleration due to gravity, and V is the total mass of the hydrogen produced. g,c V is the volume of the hydrogen-side gas in the system. g,a is the oxygen-side gas volume of the system, R is the ideal gas constant, T is the temperature, p is the pressure setpoint at the moment the power change occurs, p0 is the initial pressure value, and v is the maximum adjustment rate of hydrogen production power.

[0101] Wherein, △t 11 = (P-P0) / v. P-P0 is Δt. 11 The power change before and after.

[0102] The mapping relationship between the allowable variation in gas purity Δw and the maximum adjustment rate v of hydrogen production power is expressed as:

[0103] △w=f2(v,P,p,Q,τ p )

[0104] f2 represents the changes in gas purity (hydrogen in oxygen) during the power change process, the maximum adjustment rate v, the final power change value P (amplitude), the pressure setpoint p at the moment the power change occurs, the alkali flow rate setpoint Q, and the alkali pump delay τ. p The relationship between them can be obtained through experiments or empirical formulas.

[0105] To achieve optimal economic efficiency while simultaneously meeting the power grid interaction constraints, the following five constraints must be satisfied when obtaining the power setpoint sequence of the first electrolyzer within the time period t to t+T1 and the power setpoint sequence of the power plant within the time period t to t+T1:

[0106] 1. Each power setting value of the first electrolytic cell in the power setting value sequence is located within a preset power range.

[0107] The preset power range for the electrolytic cell power setting is [P] min P max ], that is,

[0108] Each power setting value of the first electrolytic cell in the sequence of power setting values ​​satisfies the following:

[0109] 2. The power adjustment speed corresponding to each power setting value of the first electrolytic cell in the power setting value sequence is less than or equal to the maximum adjustment speed.

[0110] That is, the range of power adjustment speed change corresponding to each power setting value of the first electrolytic cell in the power setting value sequence:

[0111] 3. The power and electricity consumption of the electro-hydrogen coupling system during the online phase must not meet the online phase limit, or the power and electricity consumption of the online phase during the offline phase must not meet the online phase limit.

[0112] Specifically, when internet access is not allowed, for

[0113] Corresponding power limits for offline operation:

[0114]

[0115] Offline power limit:

[0116]

[0117] Specifically, when disconnection is not permitted: For

[0118] Corresponding internet power limits:

[0119]

[0120] Internet battery limit:

[0121]

[0122] In the above formula, P set,1 W set 1. P set,2 W set,2 All of these are corresponding preset thresholds.

[0123] 4. The prediction accuracy of each power setpoint in the power setpoint sequence meets the accuracy error range.

[0124] At time t+k, considering the issue of power prediction accuracy, the power of the electrolytic hydrogen production system... The change that can be achieved in the next moment must cover the error range of the predicted power generation value:

[0125] when hour,

[0126] when hour,

[0127] 5. Each value in the power setpoint sequence of the power plant within the time period t to t+T1 is less than or equal to the corresponding value in the power prediction sequence of the power plant within the time period t to t+T1.

[0128] That is, it must satisfy:

[0129]

[0130]

[0131]

[0132] S3, within the time period t to t+T3, issues power regulation commands to the power station according to the power station setpoint sequence, and obtains the power station measured value sequence within the time period t to t+T3.

[0133] During the time period from t to t+T3, power regulation commands are issued based on the power setpoint sequence, and the measured power value sequence of the power station during the time period from t to t+T3 is obtained.

[0134] S4. Based on the measured power value sequence of the power plant during the time period t to t+T3, the power setpoint sequence of the first electrolyzer during the time period t to t+T1, and the power setpoint sequence of the power plant during the time period t to t+T1, determine the power setpoint sequence of the second electrolyzer during the time period t to t+T3.

[0135] Based on the above-determined sequence of power setpoints for the first electrolytic cell within the time period t to t+T1 and the sequence of power plant setpoints during the time period t to t+T1 and the sequence of measured power values ​​of the power plant during the time period from t to t+T3 Determine the sequence of power setpoints for the second electrolyzer during the time period from t to t+T3. (P H2,0 ,…,P H2,n3 ).

[0136] S5. Based on the measured power value sequence of the power plant during the time period t to t+T3, the power setpoint sequence of the second electrolyzer during the time period t to t+T3, and the power setpoint sequence of the first electrolyzer during the time period t to t+T1, determine the electrolyzer power adjustment command sequence for the time period t to t+T3, and issue the electrolyzer power adjustment command according to the electrolyzer power adjustment command sequence during the time period t to t+T3.

[0137] As one feasible approach, based on the power setpoint sequence of the second electrolyzer within the time period t to t+T3 and the power setpoint sequence of the first electrolyzer within the time period t to t+T1, the power adjustment command for each electrolyzer in the power adjustment command subsequence of the first electrolyzer is determined; based on each power adjustment command in the power adjustment command subsequence of the first electrolyzer, the measured power value sequence of the power plant within the time period t to t+T3, and the power setpoint sequence of the first electrolyzer within the time period t to t+T1, the power adjustment command for each electrolyzer in the power adjustment command subsequence of the second electrolyzer is determined; and based on the power adjustment command subsequence of the first electrolyzer and the power adjustment command subsequence of the second electrolyzer, the power adjustment command subsequence of the electrolyzer for the time period t to t+T3 is formed.

[0138] The determination of each electrolytic cell power adjustment instruction in the first electrolytic cell power adjustment instruction subsequence, based on the second electrolytic cell power setting value sequence within the time period t to t+T3 and the first electrolytic cell power setting value sequence within the time period t to t+T1, includes the following steps: obtaining multiple first moments corresponding to the first electrolytic cell power setting value sequence within the time period t to t+T1; obtaining multiple second moments corresponding to the second electrolytic cell power setting value sequence within the time period t to t+T3; for each second moment, if there are no overlapping first moments, then the second electrolytic cell power setting value corresponding to that second moment is taken as the target adjustment of the electrolytic cell for that second moment. Power; For each second moment, if there is a first moment that overlaps with the second moment, the average of the first electrolyzer power setpoint and the second electrolyzer power setpoint corresponding to the overlapping moment is obtained as the target regulating power of the electrolyzer corresponding to the overlapping moment; Based on the sequence of the first electrolyzer power setpoint, the prediction resolution, and the power plant power command transmission cycle within the time period t to t+T1, the target regulating speed of the electrolyzer corresponding to each second moment is calculated; According to the target regulating power and the target regulating speed of the electrolyzer corresponding to each second moment, the power regulating command of each electrolyzer in the first electrolyzer power regulating command subsequence is generated.

[0139] Specifically:

[0140] For any l = 0 to n³, at time t, i.e. when l = 0:

[0141]

[0142]

[0143]

[0144] For any g = 1 to T3 × T res,2 / T res,1 ,for At t+l*Tres,2 time:

[0145]

[0146]

[0147] That is, at the point where the power setting value sequence of the second electrolytic cell in the time period t to t+T3 coincides with the power setting value sequence of the first electrolytic cell in the time period t to t+T1, the power of the electrolytic cell is taken as the average of the two; the change in the power of the electrolytic cell is taken as the average of the power change determined by the power setting value sequence of the first electrolytic cell in the time period t to t+T1 over time.

[0148] for At t+l*T res,2 At any time, according to get The specific calculations are as follows:

[0149]

[0150] For situations where power generation and grid connection are not permitted:

[0151] like The anti-reverse current device is triggered, and the power generation system is disconnected from the grid.

[0152] like

[0153] (like );

[0154] or (like )

[0155] That is, the electrolysis hydrogen production power adjustment command is corrected according to the real-time power generation, and the difference between the hydrogen production power determined at the predicted time point in the first electrolyzer power setpoint sequence within the time period t to t+T1 and the current real-time power generation is evenly distributed over the remaining time.

[0156] For situations where power outages are not permitted:

[0157] like The anti-reverse current device is triggered, and the power generation system is disconnected from the grid.

[0158] like

[0159] (like );

[0160] or (like )

[0161] S6, obtain the sequence of measured electrolytic cell power values ​​within the time period from t to t+T3.

[0162] S7, at time t+T3, based on the sequence of measured power values ​​of the power plant during the time period from t to t+T3. The sequence of measured electrolytic cell power values ​​over the time period t to t+T3 The sequence of power setpoints for the first electrolytic cell during the time period t to t+T1 and the sequence of power plant setpoints during the time period t to t+T1 Update.

[0163] After the S7 update is complete, according to the new... Update again using the method in S2. Give power regulation command to the power plant The power plant power command is the power plant power obtained according to S2. The value of the corresponding sequence number is used as the power command of the power plant executed at time t+T3, and is used in S3. The value of .

[0164] S8, take time t+T3 as the new t, repeat the above S3 to S7 until time t+T2, update t, repeat the above S2 to S7 to obtain the power plant power regulation command and electrolyzer power regulation command corresponding to each time.

[0165] This application embodiment enables the real-time matching of the system's dynamic adjustment characteristics through the operation and management of the new energy and hydrogen production modules in the system, thereby meeting different grid power interaction restriction requirements and achieving high economic efficiency.

[0166] Furthermore, in this application, the method for obtaining the maximum and minimum power within the preset power range of the electrolytic cell power is as follows:

[0167] The power limit refers to the maximum power that the system can stably output. This parameter represents the highest power level the system can achieve under normal operating conditions. The power limit is usually expressed in watts (W). Exceeding this power limit may lead to system overload, damage, or other adverse consequences. In this application, the power limit is denoted as P. max .

[0168] The power lower limit refers to the minimum power value that the system can stably output. This parameter represents the lowest power level that the system can achieve under normal operating conditions. The power lower limit is usually expressed in watts (W). Falling below this power lower limit may cause the system to malfunction, experience performance degradation, or other problems. In this application, the power lower limit is denoted as P. min .

[0169] The maximum regulation rate refers to the rate at which the system power value changes over time. It represents the amount of power increase per unit time, usually expressed in watts per second (W / s) or percentage per second. In this application, the maximum regulation rate is denoted as v.

[0170] The methods for determining each of them are described in detail below.

[0171] 1. Lower power limit P min The determination method includes: obtaining the minimum allowable operating pressure of the water electrolysis hydrogen production system at the current moment; obtaining the minimum allowable alkaline flow rate of the water electrolysis hydrogen production system at the current moment; and determining the lower limit of power based on the minimum operating pressure and the minimum alkaline flow rate.

[0172] Specifically, the minimum permissible operating pressure p of the water electrolysis hydrogen production system at the current moment. min It is determined by the following formula:

[0173] p min =max{p l ,p(v m ,i),p(L)}

[0174] Where, p l The minimum permissible operating pressure for the system design is provided by the manufacturer; p(v m i) is the sum of the pressure drop generated by the gas flowing through the valve and the gas downstream pressure when operating at the lower power limit and the gas valve opening is at its maximum. (In this application, both the oxygen side and the hydrogen side of the system need to be considered, that is, at each moment p(v) m , i) has two values. ); p(L) is the pressure determined by the liquid level in the electrolytic hydrogen production gas-liquid separator.

[0175] Where p(v) m i) Determined by valve characteristics: p(v m i)=dp(v)+p exit .

[0176] v is the velocity of the gas passing through the valve when operating at the lower power limit, i is the operating current at the lower power limit, and dp(v) is the valve pressure drop at that velocity. (ρ is the gas density through the valve, and ζ is the valve characteristic coefficient, provided by the supplier); p exit This represents the gas outlet pressure.

[0177] Where p(L) = wgL + p0.

[0178] w is the density of the alkaline solution in the electrolytic cell system (determined by the density of the gas-liquid mixture), L is the difference between the liquid level in the gas-liquid separator and the reference height (such as the liquid level in the alkaline solution storage tank), p0 is the reference pressure (such as the surface pressure of the alkaline solution storage tank), and g is the acceleration due to gravity.

[0179] Because the formula requires the operating current i, p at the power lower limit. min The method for determining this requires iterative trial and error. Specifically: based on p... min =max{p l ,p(L)} determines p min Initial value; using this initial value, determine the lower power limit and the current i under this lower power limit through subsequent steps; verify p(v m i) and p min The magnitude of the initial value, if two p(v) m i) are all less than or equal to p min The lower power limit uses an initial value; if there exists any p(v m ,i)>p min The p(v) obtained by calculation m i) as p min And repeat the trial calculation process.

[0180] Specifically, the minimum allowable alkaline solution flow rate Q of the water electrolysis hydrogen production system at the current moment. min It is determined by the following formula:

[0181] Q min =max{q0,Q(n)}

[0182] Where q0 is the minimum operating flow rate of the alkali pump; n is the minimum number of alkali replacements per hour, Q(n) = V e *n, V e It is the effective liquid volume of the system, V = V c +V a n should not be too small, as a small n will lead to uneven heat distribution and the accumulation of impurities in the system. Preferably, n min Take 5-10. V c For the system hydrogen-side liquid volume, V a This represents the volume of the liquid on the oxygen side of the system.

[0183] Based on the above steps, the minimum allowable operating pressure and minimum alkali flow rate of the water electrolysis hydrogen production system at the current moment have been obtained. The next step is to determine the lower limit of power based on the minimum operating pressure and minimum alkali flow rate.

[0184] As one feasible approach, when determining the power lower limit based on the minimum operating pressure and minimum alkali flow rate, the mapping relationship between the hydrogen content in oxygen (which can be expressed as HTO, referring to the hydrogen content mixed in the gas-oxygen mixture at the outlet of the gas-liquid separator on the anode side (oxygen side) of the water electrolysis hydrogen production system) and the minimum operating pressure, minimum alkali flow rate, temperature, and current value is obtained. Based on the minimum operating pressure and minimum alkali flow rate, and combined with the mapping relationship, the current value I1 of the water electrolysis hydrogen production system is determined when the hydrogen content in oxygen is less than a preset content threshold (preferably 2%) at the current temperature. The number of cells N and the cell voltage U1 of the electrolyzer corresponding to the water electrolysis hydrogen production system are obtained. The power lower limit P is calculated based on the number of cells, cell voltage, and current value. min , where P min =N*U1*I1.

[0185] For example, one form of the mapping relationship between the hydrogen content in oxygen and the minimum operating pressure, minimum alkali flow rate, temperature, and current value in a water electrolysis hydrogen production system is as follows:

[0186]

[0187] The parameters a1-a5 are determined by the structure of the electrolytic hydrogen production system and the physicochemical properties of the electrolyte and gas. Specifically:

[0188] a1 = DSAN / d

[0189] a2 = S / 4

[0190]

[0191] a4=V s,an V l,a S O2 V g,a / R

[0192]

[0193] Where: D is the effective diffusion coefficient of hydrogen through the membrane of the electrolytic hydrogen production system, S is the solubility of hydrogen in alkaline solution, d is the membrane thickness of the electrolytic hydrogen production system, A is the effective area of ​​the electrolytic hydrogen production chamber, N is the number of chambers in the electrolytic hydrogen production system, K is the permeability coefficient of the membrane of the electrolytic hydrogen production system, ζ is the dynamic viscosity of the electrolyte, F is the Faraday constant, and V s,an V is the total liquid volume on the anode side of the electrolytic hydrogen production system, R is the ideal gas constant, and V is the total liquid volume on the anode side. g,a V is the sum of the volume of the container above the liquid surface in the oxygen-side (anode-side) gas-liquid separator and the volume between the separator's gas outlet pipe and the gas valve. l,a It is the liquid volume (S) inside the oxygen-side (anode-side) gas-liquid separator. O2It is the solubility of oxygen in alkaline solution.

[0194] Optionally, the lower limit of system power can also be determined experimentally. The specific method is as follows: Adjust the system to operate stably under rated conditions; reduce the system power, and simultaneously reduce the system pressure and flow rate; obtain the lower limit of power when the purity approaches the safety limit of 2%.

[0195] 2. Maximum power P max The methods for determining this include:

[0196] Obtain the maximum allowable voltage U2 of the electrode catalyst layer material in the water electrolysis hydrogen production system. Based on the maximum voltage U2, look up the voltage and current curve corresponding to the water electrolysis hydrogen production system (the working curve of the electrolysis hydrogen production cell, provided by the electrolyzer manufacturer or obtained experimentally) to determine the maximum current value I2 corresponding to the water electrolysis hydrogen production system. Calculate the first power upper limit P1 based on the number of cells N, the cell voltage U2, and the maximum current value I2, where P1 = N × U2 × I2.

[0197] The maximum allowable operating temperature of the membrane material in the water electrolysis hydrogen production system is obtained, and the power value corresponding to the maximum allowable flow rate of the cooling medium in the water electrolysis hydrogen production system at the maximum temperature is obtained as the second power upper limit P2.

[0198] Among them, the heat dissipation Q of the water electrolysis hydrogen production system is equal to the maximum heat exchange of the cooling equipment.

[0199] Q = N(U² - U) rev )×I2=c×q m ×△T

[0200] In the above formula, c is the specific heat capacity of the cooling medium; q m U represents the maximum flow rate of the cooling medium; ΔT represents the temperature difference of the cooling medium; U rev The neutral voltage of the electrolytic cell is 1.48V, and N is the number of cells.

[0201] The maximum operating temperature is determined based on the temperature tolerance of the diaphragm material and is provided by the diaphragm material manufacturer; for example, the Zirfon membrane commonly used in alkaline electrolyzers can withstand a maximum long-term operating temperature of 100 degrees Celsius. The cooling medium flow rate limit is determined based on the economic operating range of the heat exchange equipment and is provided by the equipment manufacturer.

[0202] After determining the first and second power limits based on different approaches, the minimum of the first and second power limits is taken as the power limit. That is, P max =min{P1,P2}.

[0203] Optionally, the upper limit of system power can also be determined experimentally. The specific method is as follows: Adjust the system to operate stably under rated conditions, and adjust the pressure to the minimum allowable pressure; increase the system current and record the voltage / temperature; when the voltage / temperature approaches the maximum allowable voltage / temperature, the upper limit of power is obtained.

[0204] 3. Methods for determining the maximum adjustment speed v include:

[0205] The difference between the maximum liquid level difference of the system and the initial liquid level difference of the water electrolysis hydrogen production system at the current moment is obtained as the allowable change value of the liquid level difference ΔLv. Combined with the mapping relationship between the allowable change value of the liquid level difference ΔLv and the maximum regulating speed, the first power-rate v of the water electrolysis hydrogen production system during the power increase process at the current moment is obtained. + P,1 .

[0206] For example, the mapping relationship between the allowable change in liquid level difference ΔLv and the first power velocity is expressed as:

[0207] △Lv=f1(v + P,1 ,P)

[0208] f1 represents the relationship between the change in liquid level difference between the hydrogen separator and the oxygen separator, the maximum rate of power change, the final value of power change P (amplitude), and the pressure setpoint at the moment of power change during the power change process. It can be obtained experimentally or through empirical formulas. For example, one form is as follows:

[0209] △Lv=(kRT×v + P,1 ×(△t 11 ) 2 +V g,a (p-p0))(1 / V g,a -2 / V g,c ) / ρg

[0210] in, N is the number of chambers in the electrolytic hydrogen production system, F is the Faraday constant, U is the chamber voltage (here, U is taken as a constant due to its low variation range, U = 1.6-2.0V), ρ is the electrolyte density, g is the acceleration due to gravity, and V is the total mass of the hydrogen produced. g,c V is the volume of the hydrogen-side gas in the system. g,a is the oxygen-side gas volume of the system, R is the ideal gas constant, T is the temperature, p is the pressure setpoint at the moment the power change occurs, and p0 is the initial pressure value.

[0211] Wherein, △t 11 =(P-P0) / v + P,1 P-P0 is Δt 11The change in power before and after.

[0212] The difference between the maximum gas purity and the initial gas purity of the water electrolysis hydrogen production system at the current moment is obtained as the allowable change value Δw for gas purity. Combined with the mapping relationship between the allowable change value Δw and the power increase rate, the second power increase rate v of the water electrolysis hydrogen production system during the power increase process at the current moment is obtained. + P,2 .

[0213] For example, the mapping relationship between the permissible variation value Δw of gas purity and the rate of increase of the second power is expressed as follows:

[0214] △w=f2(v + P,2 ,P,p,Q,τ p )

[0215] F2 represents the changes in gas purity (hydrogen in oxygen) and the maximum rate of power change during the power change process, the final value of power change P (amplitude), the pressure setpoint p at the moment the power change occurs, the alkali solution flow rate setpoint Q, and the alkali solution pump delay τ. p The relationship between them can be obtained through experiments or empirical formulas.

[0216] For example, one form is as follows:

[0217] △w=max{f(P1,p1,Q1),f(P2,p2,Q2),f(P3,p3,Q3)}

[0218] The form of f can be seen in the above text:

[0219]

[0220] Where P1, p1, Q1 represent τ respectively p ,△t 21 Δt2, power, pressure, alkali flow rate, τ p ,△t 21 △t2 represents three time intervals in which p and Q change, where 0-τ p During the time period, due to the control delay, the flow rate of the alkali pump changes from Q0 to Q, at τ p The pressure changes to Q at time 0 and remains there. During the period from 0 to Δt2, after setting the pressure value to p, the pressure slowly changes from p0 to p. This change is influenced by the gas volume and power (i.e., the amount of gas produced) on the anode side. The pressure changes at time Δt2 become p. Pressure changes often lag behind power changes; therefore, Δt2 > Δt. 21 ,△t 21 =(P-P0) / v + P,2 , which is the time required for the power change to occur.

[0221] in:

[0222] P1 = P0 + v + P,2 ×(τ e From this, the corresponding current can be obtained (based on the voltage and current curve of the water electrolysis hydrogen production system (the working curve of the electrolysis hydrogen production electrolyzer, provided by the electrolyzer manufacturer or obtained experimentally), the corresponding point on the curve where the product of voltage and current equals P1 is obtained), and the current value is substituted into f for calculation.

[0223] p1 = kRT × v + P,2 ×(τ e ) 2 / 2V g,a +p0;

[0224] Q1 = Q

[0225] P2 = P;

[0226] p2 = kRT × v + P,2 ×(△t 21 ) 2 / 2V g,a +p0, where △t 21 =(P-P0) / v + P,2 ;

[0227] Q2 = Q

[0228] P3 = P;

[0229] p3 = p;

[0230] Q3 = Q

[0231] Furthermore, the first power increase rate v + P,1 With the second power rise rate v + P,2 The minimum value is taken as the maximum adjustment speed v. This is expressed as v = min{v...} + P,1 ,v + P,2}

[0232] Figure 2 This is a schematic diagram of an electro-hydrogen coupling system shown in this application, such as... Figure 2 As shown, the electro-hydrogen coupling system includes an energy management module, a new energy power generation module, and an electrolysis hydrogen production module, wherein:

[0233] The energy management module includes an electro-hydrogen coupling control unit, a power plant power prediction unit, a power plant control unit, and an electrolysis hydrogen production control unit.

[0234] The electro-hydrogen coupling control unit is used to generate power regulation commands for the power plant and power regulation commands for the electrolyzer.

[0235] The power plant power prediction unit is used to predict the power of the power plant during the prediction period.

[0236] The power plant control unit is used to receive power regulation commands from the electro-hydrogen coupling control unit and to control the power of the power plant and transmit power in real time.

[0237] The electrolysis hydrogen production unit system is used to receive the electrolyzer power adjustment command sent by the electro-hydrogen coupling control unit and to control the power of the electrolysis hydrogen production unit.

[0238] To implement the above embodiments, this application also proposes an electronic device 300, such as... Figure 3 As shown, the electronic device 300 includes a processor 301 and a memory 302 communicatively connected to the processor. The memory 302 stores instructions that can be executed by at least one processor. The instructions are executed by at least one processor 301 to implement the operation control method of the electro-hydrogen coupling system as shown in the above embodiment.

[0239] To implement the above embodiments, this application also proposes a non-transitory computer-readable storage medium storing computer instructions, wherein the computer instructions are used to enable a computer to implement the operation control method of the electro-hydrogen coupling system as shown in the above embodiments.

[0240] To implement the above embodiments, this application also proposes a computer program product, including a computer program that, when executed by a processor, implements the operation control method of the electro-hydrogen coupling system as shown in the above embodiments.

[0241] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0242] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0243] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0244] It should be noted that in the embodiments of this application, certain software, components, models and other existing solutions in the industry may be mentioned. These should be regarded as exemplary and are only intended to illustrate the feasibility of implementing the technical solution of this application. However, it does not mean that the applicant has used or necessarily used the solution.

[0245] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A method for controlling the operation of an electro-hydrogen coupling system, characterized in that, include: S1, obtain the prediction-related parameters and power command-related parameters corresponding to the power plant power. The prediction-related parameters include the prediction period T1 and the rolling period T2. The power command-related parameters include the power plant power command transmission delay T3, where T1>T3. S2. Based on the measured power of the power plant at time t, the measured power of the electrolyzer at time t, and the power prediction sequence of the power plant in the time period t~t+T1, with the goal of optimal economic efficiency and at the same time meeting the power grid power interaction restriction requirements, obtain the first electrolyzer power setting value sequence and the power plant power setting value sequence in the time period t~t+T1. S3, within the time period t~t+T3, issue a power adjustment command for the power station according to the power station setpoint sequence, and obtain the power station measured value sequence within the time period t~t+T3; S4. Based on the power measurement sequence of the power plant in the time period t~t+T3, the power setpoint sequence of the first electrolyzer in the time period t~t+T1, and the power setpoint sequence of the power plant in the time period t~t+T1, determine the power setpoint sequence of the second electrolyzer in the time period t~t+T3. S5. Based on the measured power value sequence of the power plant during the time period t~t+T3, the power set value sequence of the second electrolyzer during the time period t~t+T3, and the power set value sequence of the first electrolyzer during the time period t~t+T1, determine the electrolyzer power adjustment command sequence for the time period t~t+T3, and issue the electrolyzer power adjustment command according to the electrolyzer power adjustment command sequence during the time period t~t+T3. S6, obtain the sequence of measured electrolytic cell power values ​​within the time period t~t+T3; S7, at time t+T3, update the first electrolytic cell power setpoint sequence and the power plant power setpoint sequence in the time period t~t+T1 based on the power plant power measured value sequence in the time period t~t+T3 and the electrolyzer power measured value sequence in the time period t~t+T3; S8, take time t+T3 as the new t, repeat the above S3~S7 until time t+T2, update t, repeat the above S2~S7 to obtain the power plant power regulation command and electrolyzer power regulation command corresponding to each time.

2. The method according to claim 1, characterized in that, The prediction-related parameters also include prediction accuracy and prediction value resolution; the power plant power command-related parameters also include the power plant power command transmission cycle, and the command issuance cycle of the electrolytic cell power adjustment command is not greater than the power plant power command transmission cycle.

3. The method according to claim 2, characterized in that, In S2, the payoff function corresponding to the goal of economic optimization is: W=Max( + - - - ) In the above formula, W represents the total revenue. For the hydrogen production revenue of the electrolysis hydrogen production unit, The revenue generated by the electricity-hydrogen coupling system when it is allowed to connect to the grid, or the penalty cost for connecting to the grid when it is not allowed to do so. To cover the operation and maintenance costs of the electrolysis hydrogen production unit, The cost of disconnecting the electro-hydrogen coupling system from the grid when disconnection is permitted, or the penalty cost of disconnection when disconnection is not permitted. The power regulation cost of the electrolytic hydrogen production unit is related to the power regulation range.

4. The method according to claim 3, characterized in that, The calculation formulas for each parameter involved in the profit function include: - ,..., - ] In the above formula, This is the sequence of power plant setpoints within the time period t to t+T1; The sequence of power setpoints for the first electrolytic cell within the time period t~t+T1; In the above formula, It is the hydrogen-to-electric conversion efficiency of the electrolytic hydrogen production unit; The price of hydrogen during the time period t~t+T1 is determined by market dynamics. It is the resolution of the predicted value; In the above formula, It refers to the efficiency of power transmission from the power plant to the grid, which is related to factors such as line losses; It refers to the feed-in tariff or penalty cost within the time period t~t+T1. The feed-in tariff is determined by market dynamics; the penalty cost is determined by the punitive actions triggered by feed-in. In the above formula, It is the variable cost of hydrogen production by electrolysis; The fixed cost per unit time for hydrogen production by electrolysis is related to the depreciation rate; This is the rated hydrogen production power of the electrolytic hydrogen production unit; In the above formula, It refers to the off-grid electricity price or penalty cost within the time period t~t+T1. The off-grid electricity price is determined by market dynamics, and the penalty cost is determined by the penalty actions caused by the off-grid operation. In the above formula, It is the cost of each adjustment during the time period t~t+T1 of electrolytic hydrogen production, which is related to the power change of each adjustment.

5. The method according to claim 4, characterized in that, In S2, to achieve optimal economic efficiency while simultaneously meeting the grid power interaction constraint requirements, the following constraints must be met when obtaining the power setpoint sequence of the first electrolyzer within the time period t~t+T1 and the power setpoint sequence of the power plant within the time period t~t+T1: Each power setting value of the first electrolytic cell in the first electrolytic cell power setting value sequence is within a preset power range; The power adjustment speed corresponding to each power setting value of the first electrolytic cell in the power setting value sequence is less than or equal to the maximum adjustment speed; The electro-hydrogen coupling system is not allowed to meet the offline power and offline electricity limits when connecting to the network, or it is not allowed to meet the offline power and offline electricity limits when disconnecting from the network. The prediction accuracy of each power station power setpoint in the power station power setpoint sequence meets the accuracy error range.

6. The method according to claim 5, characterized in that, In the method, each value in the power plant power setpoint sequence within the time period t~t+T1 is less than or equal to the corresponding value in the power plant power prediction sequence within the time period t~t+T1.

7. The method according to claim 6, characterized in that, In step S5, based on the measured power value sequence of the power plant during the time period t~t+T3, the power setpoint sequence of the second electrolyzer during the time period t~t+T3, and the power setpoint sequence of the first electrolyzer during the time period t~t+T1, the electrolyzer power adjustment command sequence for the time period t~t+T3 is determined, including: Based on the power setting value sequence of the second electrolytic cell within the time period t~t+T3 and the power setting value sequence of the first electrolytic cell within the time period t~t+T1, determine the power adjustment instruction of each electrolytic cell in the power adjustment instruction subsequence of the first electrolytic cell; Based on each electrolytic cell power adjustment instruction in the first electrolytic cell power adjustment instruction subsequence, the power plant measured value sequence within the time period t~t+T3, and the power set value sequence of the first electrolytic cell within the time period t~t+T1, each electrolytic cell power adjustment instruction in the second electrolytic cell power adjustment instruction subsequence is determined. The electrolytic cell power adjustment command subsequence is composed of the first electrolytic cell power adjustment command subsequence and the second electrolytic cell power adjustment command subsequence for the time period t~t+T3.

8. The method according to claim 7, characterized in that, The method for determining each electrolytic cell power adjustment command in the first electrolytic cell power adjustment command subsequence based on the second electrolytic cell power setpoint sequence within the time period t~t+T3 and the first electrolytic cell power setpoint sequence within the time period t~t+T1 includes: Obtain multiple first moments corresponding to the sequence of power setpoints of the first electrolyzer within the time period t~t+T1; Obtain multiple second time points corresponding to the power setpoint sequence of the second electrolyzer within the time period t~t+T3; For each second moment, if there is no first moment that overlaps with the second moment, then the second electrolytic cell power setting value corresponding to the second moment is taken as the target adjustment power of the electrolytic cell corresponding to the second moment. For each second moment, if there is a first moment that overlaps with the second moment, the average of the first electrolytic cell power setting value and the second electrolytic cell power setting value corresponding to the time overlap is obtained as the target adjustment power of the electrolytic cell corresponding to the time overlap. Based on the first electrolyzer power setpoint sequence, prediction resolution and power command transmission cycle of the power plant within the time period t~t+T1, calculate the target power adjustment speed of the electrolyzer at each second time point; Based on the target adjustment power and target power adjustment speed of the electrolyzer corresponding to each second time moment, generate each electrolyzer power adjustment instruction in the first electrolyzer power adjustment instruction subsequence.

9. An electronic device, comprising: At least one processor; as well as A memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor to enable the at least one processor to perform the method of any one of claims 1-8.

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