Off-grid wind-solar-hydrogen storage system and control method thereof

Abstract

The present application relates to the technical field of electric power energy storage, in particular to an off-grid wind-solar-hydrogen storage system and a control method thereof. An intelligent control center formulates a system operation control strategy according to the power supply state of a hydrogen production power supply system, calculates a target output of an energy storage system according to real-time operation data and wind-solar output prediction data of the system, and determines the number N1 of electrolytic cell tables operating at an optimal power point, the number N of adjustable electrolytic cell tables, and the number N of electrolytic cell tables operating at a non-optimal power point t , wherein the electrolytic cell operating at the optimal power point is determined at least according to the current operating power of the electrolytic cell and the cumulative operating time of the electrolytic cell, the number N of adjustable electrolytic cell tables is determined at least according to the temperature of the electrolytic cell, the critical electrolytic cell temperature for thermal starting, and the working temperature of the electrolytic cell t . In combination with wind-solar output prediction and taking into full consideration of factors such as the operating temperature of the electrolytic cell, the cumulative operating time, and the real-time operating power, the safety and stability of the electrolytic cell in operation, the system performance in the whole life cycle, and the wind-solar consumption capacity are improved.

Description

Technical Field

[0001] The present invention relates to the field of electric energy storage technology, and in particular to an off-grid wind-solar hydrogen storage system and a control method thereof. Background Art

[0002] Hydrogen production from renewable energy is one of the important ways to promote the consumption of wind and solar power and achieve the "dual carbon" goals. Compared with the grid-connected hydrogen production mode, off-grid hydrogen production can improve system efficiency, reduce construction period and dependence on the power grid, and is conducive to building an integrated energy system. It is one of the new energy storage and conversion methods. However, the frequent fluctuations in wind and solar power generation will cause the electrolyzer to start and stop frequently, resulting in reduced hydrogen production and damage to the electrolyzer and power electronic devices. Therefore, it is necessary to configure an energy storage system to ensure the stability of the hydrogen production power supply.

[0003] Numerous experts and scholars have conducted research on these issues. Patent CN 112217227 formulates an operating strategy by determining whether PV output can activate electrolyzer hydrogen production, thereby avoiding frequent electrolyzer starts and stops in low PV conditions. Patent CN 112290581 proposes developing a control strategy for increasing or decreasing electrolyzer capacity based on current wind and solar output power and electrolyzer operating power. However, this strategy only considers the real-time matching of wind and solar output power with electrolyzer operating power, and does not fully consider the impact of wind and solar output fluctuations on electrolyzer performance. Patent CN 112751354 proposes matching hydrogen production power with hydrogen consumption by installing multiple disconnectors in multiple series-connected PV modules, adjusting PV output based on hydrogen production load output. This approach also focuses solely on real-time matching of wind and solar output power with electrolyzer operating power. Consequently, current research focuses primarily on developing wind and solar or electrolyzer operating strategies based on power matching between wind and solar and hydrogen consumption loads.

[0004] However, the random fluctuations in wind and solar power output can affect electrolyzer performance. Specifically, the intermittent nature of wind and solar power output causes some electrolyzers to frequently start and stop, impacting performance; some electrolyzers operate at low load, increasing the hydrogen content in oxygen and posing a safety hazard; and electrolyzer operating power fluctuates frequently, deviating from the optimal operating point. Therefore, it is necessary to research integrated wind, solar, and hydrogen storage systems to fully leverage the role of energy storage systems in improving electrolyzer power stability, enhancing the safe and stable operation of electrolyzers, and improving system performance throughout their lifecycle and the ability to absorb wind and solar power. Summary of the Invention

[0005] The purpose of the present invention is to address the defects of the existing technology and provide an off-grid wind-solar hydrogen storage system. It combines wind-solar output prediction and fully considers factors such as the operating temperature of the electrolyzer, accumulated operating time, and real-time operating power, thereby reducing the risk of frequent start-up and shutdown of the electrolyzer, balancing the working time of the electrolyzer, reducing the fluctuation of the electrolyzer operating power, and avoiding the electrolyzer from being in a low-load operating state, thereby improving the safe and stable operation capability of the electrolyzer, the system performance throughout its life cycle, and the wind-solar absorption capacity.

[0006] The present invention provides an off-grid wind-solar hydrogen storage system, comprising a hydrogen production power supply system, a power transmission and transformation system, a water electrolysis hydrogen production system, hydrogen production station auxiliary equipment, and an intelligent control center. The hydrogen production power supply system comprises an energy storage system power distribution controller, a wind-solar power generation system, and an energy storage system. The water electrolysis hydrogen production system comprises a hydrogen production power distribution controller and an electrolyzer. The hydrogen production power supply system is connected to the water electrolysis hydrogen production system, the hydrogen production station auxiliary equipment, and the intelligent control center via the power transmission and transformation system.

[0007] The intelligent control center is used to formulate a system operation control strategy according to the power supply status of the hydrogen production power system. The system operation control strategy includes calculating the target output of the energy storage system according to the real-time operation data of the system and the wind and solar output forecast data, and determining the number of electrolyzers N1 operating at the optimal power point and the number of adjustable electrolyzers N t , wherein the electrolytic cell operating at the optimal power point is determined at least according to the current operating power of the electrolytic cell and the cumulative operating time of the electrolytic cell, and the number of adjustable electrolytic cells N t The determination is based on at least the current temperature of the electrolytic cell, the hot start critical electrolytic cell temperature, the electrolytic cell operating temperature, and the accumulated operating time of the electrolytic cell;

[0008] The hydrogen production power distribution controller is used to control the selected N1 electrolyzers to operate at the optimal power point and control the selected N t The electrolyzer is operated at least at the minimum power to produce hydrogen;

[0009] The energy storage system power distribution controller is used to formulate an energy storage system target output curve according to the energy storage system target output, and to supply power to the water electrolysis hydrogen production system or hydrogen production station auxiliary equipment according to the energy storage system target output curve.

[0010] Preferably, the power transmission and transformation system includes a second power transmission and transformation system and a third power transmission and transformation system, the hydrogen production power supply system includes a wind-solar power generation system, an energy storage system power distribution controller and several subsystems, each of the subsystems includes an energy storage system and a first power transmission and transformation system, the wind-solar power generation system is connected to one end of each of the first power transmission and transformation systems through the energy storage system power distribution controller, the other end of the first power transmission and transformation system is connected to the energy storage system, the wind-solar power generation system and the energy storage system power distribution controller are connected to the input end of the water electrolysis hydrogen production system through the second power transmission and transformation system, and the wind-solar power generation system and the energy storage system power distribution controller are connected to the input end of the hydrogen production station auxiliary equipment through the third power transmission and transformation system;

[0011] The water electrolysis hydrogen production system includes a hydrogen production power distribution controller, one or more power conversion systems, and one or more electrolyzers. The power conversion systems are arranged in a one-to-one correspondence with the electrolyzers. The input end of the power conversion system is connected to the output end of the hydrogen production power distribution controller, and the output end of the power conversion system is connected to the input end of the electrolyzer.

[0012] Preferably, the intelligent control center formulates a system operation control strategy according to the power supply status of the hydrogen production power system, including:

[0013] When the available power of the hydrogen production power supply system is sufficient to operate each electrolyzer at an optimal power point, the target output of the energy storage system is calculated, and according to the target output of the energy storage system, the hydrogen production power supply system provides direct current to the electrolyzers of the water electrolysis hydrogen production system and alternating current to the auxiliary equipment of the hydrogen production station. Each electrolyzer operates at an optimal power point, and excess power is stored in the energy storage system.

[0014] When the available power of the hydrogen production power supply system is insufficient to operate each electrolyzer at the optimal power point, the number of electrolyzers N1 and the number of adjustable electrolyzers N1 operating at the optimal power point are determined based on the real-time operation data of the system and the wind and solar output forecast data. t , and select the electrolytic cell with the current operating power close to the optimal power and the shortest cumulative operating time as the electrolytic cell operating at the optimal power point, select the electrolytic cell with the lower electrolytic cell temperature and the shortest cumulative operating time as the adjustable electrolytic cell, and the remaining electrolytic cells do not work.

[0015] More preferably, the method of selecting the electrolytic cell whose current operating power is close to the optimal power and whose cumulative operating time is short as the electrolytic cell operating at the optimal power point is:

[0016] Calculate the characteristic parameters of the i-th electrolytic cell

[0017] The characteristic parameter d iSort by small to large and select the characteristic parameter d i The smallest electrolyzer, N1, serves as the electrolyzer operating at the optimal power point;

[0018] Among them, p di is the current operating power of the i-th electrolytic cell, m1 is the influence weight of the electrolytic cell operating power, h i is the cumulative operating time of the i-th electrolytic cell, P d is the rated power supply of a single electrolytic cell, and η is the ratio of the optimal operating power of the electrolytic cell to the rated power.

[0019] More preferably, the method of selecting an electrolytic cell with a lower electrolytic cell temperature and a shorter cumulative operating time as the adjustable electrolytic cell is:

[0020] Calculate the characteristic parameters of the i-th electrolytic cell

[0021] The characteristic parameter t i Sort by small to large and select characteristic parameter t i Minimum N t The electrolyzer is used as an adjustable electrolyzer;

[0022] Among them, m2 is the influence weight of electrolytic cell temperature, T i is the current temperature of the i-th electrolytic cell, T q is the critical electrolytic cell temperature for hot start, T d is the working temperature of the electrolytic cell, h i is the cumulative operating time of the i-th electrolytic cell.

[0023] Another aspect of the present invention provides a control method for an off-grid wind-solar hydrogen storage system, comprising:

[0024] Collecting the real-time output of wind and solar power, and calculating the available power of the hydrogen production power system based on the real-time output of wind and solar power and the total installed power of the energy storage system;

[0025] If the available power of the hydrogen production power supply system is sufficient to enable each electrolyzer to operate at the optimal power point, the target output of the energy storage system is calculated;

[0026] If the available power of the hydrogen production power supply system is insufficient to operate each electrolyzer at the optimal power point, the number of electrolyzers N1 operating at the optimal power point and the number of adjustable electrolyzers N are determined based on the real-time operation data of the system and the wind and solar output forecast data. t ;

[0027] Select the electrolyzer whose current operating power is close to the optimal power and whose cumulative operating time is short as the electrolyzer operating at the optimal power point;

[0028] Select an electrolytic cell with a lower electrolytic cell temperature and a shorter cumulative operating time as an adjustable electrolytic cell;

[0029] Control the selected N1 electrolyzer to operate at the optimal power point, control the selected N t The electrolyzer is operated at least at the minimum power to produce hydrogen;

[0030] Calculate the target output curve of the energy storage system;

[0031] Analyzing the target output of the energy storage system or the target output curve of the energy storage system, and formulating target output curves of power-type and energy-type energy storage systems;

[0032] Power is supplied to the water electrolysis hydrogen production system or the auxiliary equipment of the hydrogen production station according to the formulated target output curves of the power-type and energy-type energy storage systems.

[0033] More preferably, the number of electrolytic cells N1 and the number of adjustable electrolytic cells N1 operating at the optimal power point are determined based on the real-time operation data of the system and the wind and solar output forecast data. t include:

[0034] Predicting the output of wind and solar power within a prediction period to obtain the total output power of wind and solar power within the prediction period;

[0035] Calculate the total available power of the hydrogen production power system during the forecast period based on the current remaining available power of the energy storage system and the total wind and solar power output during the forecast period;

[0036] Calculate the number of electrolyzers N1 that can be driven by the total available electricity in the forecast period and operate at the optimal power point;

[0037] According to the maximum power of the wind and solar output curve, determine the minimum number of electrolyzers N2 required to absorb the maximum wind and solar output, and determine the adjustable number of electrolyzers N based on N1 and N2. t ;

[0038] Among them, when N1>N2, N t is 0; when N1≤N2, N t =N2-N1.

[0039] More preferably, the method of selecting the electrolytic cell whose current operating power is close to the optimal power and whose cumulative operating time is short as the electrolytic cell operating at the optimal power point is:

[0040] Calculate the characteristic parameters of the i-th electrolytic cell

[0041] The characteristic parameter d i Sort by small to large and select the characteristic parameter d i The smallest electrolyzer, N1, serves as the electrolyzer operating at the optimal power point;

[0042] Among them, p di is the current operating power of the i-th electrolytic cell, m1 is the influence weight of the electrolytic cell operating power, h i is the cumulative operating time of the i-th electrolytic cell, P d is the rated power supply of a single electrolytic cell, and η is the ratio of the optimal operating power of the electrolytic cell to the rated power.

[0043] More preferably, the method of selecting an electrolytic cell with a lower electrolytic cell temperature and a shorter cumulative operating time as the adjustable electrolytic cell is:

[0044] Calculate the characteristic parameters of the i-th electrolytic cell

[0045] The characteristic parameter t i Sort by small to large and select characteristic parameter t i Minimum N t The electrolyzer is used as an adjustable electrolyzer;

[0046] Among them, m2 is the influence weight of electrolytic cell temperature, T i is the current temperature of the i-th electrolytic cell, T q is the critical electrolytic cell temperature for hot start, T d is the working temperature of the electrolytic cell, h i is the cumulative operating time of the i-th electrolytic cell.

[0047] Preferably, the method for calculating the target output of the energy storage system includes:

[0048] According to the formula P SE =P E -P Q Calculate the target output P of the energy storage system SE , where P E To provide real-time power for wind and solar power, P Q is the power of the water electrolysis hydrogen production system;

[0049] The method for calculating the target output curve of the energy storage system includes:

[0050] According to the formula P SE =P e -P q Calculate and obtain target output data of multiple energy storage systems;

[0051] Obtaining a target output curve of the energy storage system according to the plurality of target output data of the energy storage system;

[0052] Among them, P e is the wind and solar output curve data within the forecast period, P qis the target power load of the water electrolysis hydrogen production system within the forecast period, P SE Contribute to the energy storage system goals.

[0053] The beneficial effects of the present invention are: combining wind and solar power output prediction and fully considering factors such as the operating temperature of the electrolytic cell, the accumulated operating time, and the real-time operating power, thereby reducing the risk of frequent start-up and shutdown of the electrolytic cell, balancing the working time of the electrolytic cell, reducing the fluctuation of the operating power of the electrolytic cell, and avoiding the electrolytic cell from being in a low-load operating state, thereby improving the safe and stable operation capability of the electrolytic cell, the system performance throughout its life cycle, and the wind and solar absorption capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 This is a connection diagram of an off-grid wind-solar hydrogen storage system of the present invention;

[0055] Figure 2 This is a flow chart of a control method for an off-grid wind-solar hydrogen storage system according to the present invention;

[0056] Figure 3 The figure is a schematic diagram of a wind power output curve in one embodiment of the present invention.

[0057] In the figure: 1-Hydrogen production power supply system, 101-Wind and solar power generation system, 102-Energy storage system, 103-First power transmission and transformation system, 2-Power transmission and transformation system, 201-Second power transmission and transformation system, 202-Third power transmission and transformation system, 3-Water electrolysis hydrogen production system, 301-Hydrogen production power distribution controller, 302-Power transformation system, 303-Electrolyzer, 4-Hydrogen production station auxiliary equipment, 5-Intelligent control center DETAILED DESCRIPTION

[0058] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0059] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0060] 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0061] In the following description, specific details such as specific system structures and technologies are provided for illustration rather than limitation to facilitate a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details.

[0062] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or collections thereof.

[0063] It will also be understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0064] References to "one embodiment" or "some embodiments" in this specification mean that one or more embodiments of the present application include a particular feature, structure, or characteristic described in conjunction with that embodiment. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in other embodiments" appearing in various places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more but not all embodiments," unless otherwise specifically emphasized. The terms "including," "comprising," "having," and variations thereof all mean "including but not limited to," unless otherwise specifically emphasized. "Multiple" means "two or more."

[0065] Example 1

[0066] Figure 1 The following is a structural diagram of an off-grid wind-solar hydrogen storage system provided by a preferred embodiment of the present application. For ease of explanation, only the parts related to this embodiment are shown, which are detailed as follows:

[0067] An off-grid wind-solar hydrogen storage system includes a hydrogen production power supply system 1, a power transmission and transformation system 2, a water electrolysis hydrogen production system 3, hydrogen production station auxiliary equipment 4 and an intelligent control center 5. The hydrogen production power supply system 1 includes an energy storage system power distribution controller 104, a wind-solar power generation system 101 and an energy storage system 102. The water electrolysis hydrogen production system 3 includes a hydrogen production power distribution controller 301 and an electrolyzer 303. The hydrogen production power supply system 1 is connected to the water electrolysis hydrogen production system 3, the hydrogen production station auxiliary equipment 4 and the intelligent control center 5 through the power transmission and transformation system 2;

[0068] The intelligent control center 5 is used to formulate system operation control strategy according to the power supply state of the hydrogen production power supply system 1, and the formulation of the system operation control strategy includes calculating the target output of the energy storage system according to the real-time operation data of the system and the wind and light output prediction data, and determining the number N1 of electrolytic cells running at the optimal power point, the number N t of adjustable electrolytic cells, the number N t of electrolytic cells running at the optimal power point is determined at least according to the current running power of the electrolytic cell, the cumulative running time of the electrolytic cell, and the number N t of adjustable electrolytic cells is determined at least according to the current temperature of the electrolytic cell, the critical electrolytic cell temperature of thermal start, the working temperature of the electrolytic cell, and the cumulative running time of the electrolytic cell.

[0069] The hydrogen production power supply power distribution controller 301 is used to control the selected N1 electrolytic cells to run at the optimal power point, and control the selected N t electrolytic cells to run at least at the minimum hydrogen production power.

[0070] The energy storage system power distribution controller 104 is used to formulate the target output curve of the energy storage system according to the target output of the energy storage system, and supply power to the water electrolysis hydrogen production system 3 or the hydrogen production station auxiliary equipment 4 according to the target output curve of the energy storage system.

[0071] The power transmission and transformation system 2 includes a second power transmission and transformation system 201 and a third power transmission and transformation system 202, the hydrogen production power supply system 1 includes a wind and light power generation system 101, an energy storage system power distribution controller 104 and a plurality of subsystems, each of the subsystems includes an energy storage system 102 and a first power transmission and transformation system 103, the wind and light power generation system 101 is connected with one end of each of the first power transmission and transformation systems 103 through the energy storage system power distribution controller 104, the other end of the first power transmission and transformation system 103 is connected with the energy storage system 102, the wind and light power generation system 101 and the energy storage system power distribution controller 104 are connected with the input end of the water electrolysis hydrogen production system 3 through the second power transmission and transformation system 201, and the wind and light power generation system 101 and the energy storage system power distribution controller 104 are connected with the input end of the hydrogen production station auxiliary equipment 4 through the third power transmission and transformation system 202.

[0072] The water electrolysis hydrogen production system 3 includes a hydrogen production power supply power distribution controller 301, one or more power transformation systems 302, and one or more electrolytic cells 303, the power transformation system 302 is arranged one by one with the electrolytic cell 303, the input end of the power transformation system 302 is connected with the output end of the hydrogen production power supply power distribution controller 301, and the output end of the power transformation system 302 is connected with the input end of the electrolytic cell 303.

[0073] In application, the first to third power transmission and transformation systems 103 to 202 include, but are not limited to, transformers, AC / DC converters, DC / DC converters, and transmission cables for achieving transmission and conversion between different voltages. The wind-solar power generation system 101 can be any one or a combination of a wind power generation system and a photovoltaic power generation system, and is used to provide power to the electrolyzer system, hydrogen station auxiliary equipment, and energy storage system. The energy storage system includes an energy-type energy storage system and a power-type energy storage system. The energy-type energy storage system includes any one or a combination of pumped storage, compressed air energy storage, and electrochemical energy storage. The power-type energy storage system includes any one or a combination of flywheel energy storage, supercapacitors, etc. The electrolyzer can be any one or a combination of an alkaline electrolyzer, a PEM electrolyzer, or a solid oxide electrolyzer.

[0074] When the wind and solar power output is sufficient, part of the electric energy output by the wind and solar system is used to charge the energy storage system through the first power transmission and transformation system 103, and the other part of the electric energy is converged and provided to the electrolytic cell through the second power transmission and transformation system 201, and to the auxiliary equipment through the third power transmission and transformation system 202.

[0075] When the wind and solar power output is insufficient, the energy storage system outputs electric energy through the first transmission and transformation system 103. After merging with the wind and solar power output electric energy, it provides direct current to the electrolytic cell through the second transmission and transformation system 201 and provides alternating current to auxiliary equipment through the third transmission and transformation system 202.

[0076] When there is no wind and solar power output, the energy storage system outputs electric energy through the first power transmission and transformation system 103, and then provides direct current to the electrolyzer through the second power transmission and transformation system 201, and provides alternating current to auxiliary equipment through the third power transmission and transformation system 202.

[0077] Based on real-time data collected from wind and solar power output, energy storage systems, and water electrolysis hydrogen production systems, as well as wind and solar power output forecasts, the intelligent control center determines the operating status of the wind, solar, and hydrogen storage systems. The hydrogen production power distribution controller controls the operating power, running, and shutdown status of each electrolyzer. The energy storage power distribution controller further analyzes the target output of the energy storage system and develops target output curves for power- and energy-based energy storage systems based on the target output frequency. The control method proposed by the present invention is illustrated below through specific examples.

[0078] In one embodiment, the intelligent control center 5 formulates a system operation control strategy according to the power supply status of the hydrogen production power system 1, including:

[0079] When the available power of the hydrogen production power supply system 1 is sufficient to operate each electrolyzer at an optimal power point, the target output of the energy storage system is calculated, and according to the target output of the energy storage system, the hydrogen production power supply system 1 provides direct current to the water electrolysis hydrogen production system 3 and alternating current to the hydrogen production station auxiliary equipment 4. Each electrolyzer operates at an optimal power point, and excess power is stored in the energy storage system 102.

[0080] When the available power of the hydrogen production power system 1 is insufficient to enable each electrolytic cell to operate at the optimal power point, the number N1 of electrolytic cells operating at the optimal power point and the number N of adjustable electrolytic cells are determined according to real-time operation data of the system and wind-solar power output prediction data t , and electrolytic cells with a current operating power close to the optimal power and a short cumulative operating time are selected as the electrolytic cells operating at the optimal power point, and electrolytic cells with a low temperature and a short cumulative operating time are selected as the adjustable electrolytic cells, and the remaining electrolytic cells are not operated.

[0081] Embodiment Two

[0082] As shown in Figure 2 , the embodiment also provides a control method of the off-grid wind-solar hydrogen storage system. First, the total installed power of the energy storage system is set as P C , the electric quantity is set as Q C , the rated power supply power of a single electrolytic cell is set as P d , the total number of electrolytic cells is set as N, the power supply power of the auxiliary system is set as P g , and the ratio of the optimal operating power of the electrolytic cell to the rated power is set as η. The method comprises the following steps:

[0083] Step S1, collecting the real-time wind-solar power P E , calculating the available power P of the hydrogen production power system according to the real-time wind-solar power P E and the total installed power of the energy storage system P E + P C .

[0084] In application, after the available power P of the hydrogen production power system is calculated, the method further comprises the step S101 of comparing the available power P of the hydrogen production power system with N*ηP d + P g , to determine whether the available power of the hydrogen production power system is sufficient to enable each electrolytic cell to operate at the optimal power point.

[0085] Step S2, if the available power of the hydrogen production power system is sufficient to enable each electrolytic cell to operate at the optimal power point, i.e., P > N*ηP d + P g , the target output of the energy storage system is calculated, and the step S8 is jumped to.

[0086] In application, the method of calculating the target output of the energy storage system comprises:

[0087] calculating the target output P SE of the energy storage system according to the formula P E = P Q -P SE , wherein P E is the real-time wind-solar power, and PQ is the power of the water electrolysis hydrogen production system, P Q The power of the hydrogen production system is: N*ηP d +P g .

[0088] Step S3: If the available power of the hydrogen production power system is insufficient to operate each electrolyzer at the optimal power point, that is, P < N*ηP d +P g , the number of electrolyzers N1 operating at the optimal power point and the number of adjustable electrolyzers N are determined based on the real-time system operation data and wind and solar output forecast data. t .

[0089] In one embodiment, step S3 specifically includes steps S301 to S307:

[0090] In step S301, the intelligent control center collects wind and solar power output data, predicts the wind and solar power output within a prediction time period (such as n hours), and obtains the total wind and solar power output within the prediction time period.

[0091] In the application, the predicted number of hours of wind and solar power output, n, can be comprehensively determined by the historical wind and solar power output curve, the installed time of the energy storage system, and the temperature change of the electrolyzer.

[0092] Step S302: Based on the current available power Q of the energy storage system soc And the total wind and solar power output Q during the forecast period E Calculate the total available power Q of the hydrogen power system during the forecast period = Q E +Q soc .

[0093] Step S303 , calculating the number N1 of electrolytic cells operating at the optimal power point that can be driven by the total available power within the predicted time period.

[0094] In application, N1=(Qn*P g ) / n / (ηP d ).

[0095] Step S304: Determine the minimum number of electrolytic cells N2 required to absorb the maximum wind and solar power output according to the maximum power of the wind and solar power output curve.

[0096] In the application, the formula N2 = (maximum wind and solar power output - energy storage charging power - P g ) / P d Calculate N2.

[0097] Step S305: Determine the size of N1 and N2.

[0098] Step S306, if N1 <N2,则N tis 0.

[0099] Step S307: If N1≤N2, then N t =N2-N1.

[0100] Step S4: Select the electrolytic cell whose current operating power is close to the optimal power and whose cumulative operating time is short as the electrolytic cell operating at the optimal power point.

[0101] In one embodiment, the method for selecting N1 electrolytic cells in step S4 is as follows:

[0102] Calculate the characteristic parameters of the i-th electrolytic cell

[0103] The characteristic parameter d i Sort by small to large and select the characteristic parameter d i The smallest electrolyzer, N1, serves as the electrolyzer operating at the optimal power point;

[0104] Among them, p di is the current operating power of the i-th electrolytic cell, m1 is the influence weight of the electrolytic cell operating power, h i is the cumulative operating time of the i-th electrolytic cell, P d is the rated power supply of a single electrolytic cell, and η is the ratio of the optimal operating power of the electrolytic cell to the rated power.

[0105] Step S5: Select an electrolytic cell with a lower electrolytic cell temperature and a shorter cumulative operating time as the adjustable electrolytic cell.

[0106] In one embodiment, in step S5, N t The selection method of electrolyzer is as follows:

[0107] Calculate the characteristic parameters of the i-th electrolytic cell

[0108] The characteristic parameter t i Sort by small to large and select characteristic parameter t i Minimum N t The electrolyzer is used as an adjustable electrolyzer;

[0109] Among them, m2 is the influence weight of electrolytic cell temperature, T i is the current temperature of the i-th electrolytic cell, T q is the critical electrolytic cell temperature for hot start, T d is the working temperature of the electrolytic cell, h i is the cumulative operating time of the i-th electrolytic cell.

[0110] Step S6, control the selected N1 electrolytic cells to operate at the optimal power point, control the selected N tThe electrolytic tanks are operated at the minimum power for hydrogen production to absorb the excess wind and solar output, and the remaining electrolytic tanks are not operated. N1+N t The operating power of the electrolytic tanks in Taiwan is not less than the minimum power for hydrogen production to maintain the safe and stable operation of the electrolytic tanks.

[0111] Step S7, calculate the target output curve of the energy storage system.

[0112] In application, the method of the target output curve of the energy storage system includes:

[0113] According to the formula P SE = P e -P q A plurality of target output data of the energy storage system is calculated;

[0114] The target output curve of the energy storage system is obtained according to the plurality of target output data of the energy storage system, which can be drawn by data fitting at the same time;

[0115] Wherein, P e is the wind and solar output curve data in the prediction period, P q is the target power load of the water electrolysis hydrogen production system in the prediction period, and P SE is the target output of the energy storage system.

[0116] Step S8, analyze the target output of the energy storage system or the target output curve of the energy storage system, and develop the target output curve of the power type and energy type energy storage system.

[0117] Step S9, power the water electrolysis hydrogen production system or hydrogen production station auxiliary equipment according to the developed target output curve of the power type and energy type energy storage system.

[0118] The method is based on real-time operation data and wind and solar output prediction data of the wind and solar hydrogen storage system. Firstly, the number of operating electrolytic tanks N1 and N2 is determined by taking the wind and solar power generation capacity and the maximum wind and solar output in the prediction period as the target. Then, the number of electrolytic tanks operating near the best operating point, adjustable and shutdown is determined. Secondly, the cumulative operating time of the electrolytic tank, the current operating power and the electrolytic tank temperature are fully considered to select the electrolytic tank operating near the best operating point, adjustable and shutdown. Thirdly, the target output curve of the energy storage system is developed according to the wind and solar output prediction and the predicted operating power of the electrolytic tank. Finally, the electrolytic tank and auxiliary equipment are powered by the real-time wind and solar and energy storage system.

[0119] In summary, this embodiment considers the wind, solar, and energy storage power generation within the predicted absorption period, as well as the maximum absorbed wind and solar output, to determine the number of electrolyzers operating near the optimal operating point, adjustable, and shut down. This ensures wind and solar absorption capacity while avoiding power fluctuations and low-load conditions for some electrolyzers due to insufficient wind and solar output, thereby improving the safety of the hydrogen production system and reducing the number of electrolyzer starts and stops, thereby enhancing system performance throughout its lifecycle. By selecting electrolyzers operating near the optimal operating point based on electrolyzer operating power and accumulated operating time, electrolyzer operating hours can be balanced, ensuring that some electrolyzers operate at their optimal operating points as much as possible, maintaining high performance. By selecting adjustable electrolyzers based on electrolyzer temperature and accumulated operating time, frequent starts and stops caused by cold starts after prolonged inactivity can be avoided, thereby improving electrolyzer performance. By setting the target output of the energy storage system based on the predicted wind and solar output and the electrolyzer operating power, the energy storage system can fully leverage its peak load shaving and valley filling capabilities, improving the stability of the electrolyzer power supply.

[0120] Example 3

[0121] This example analyzes a 100MW wind and solar power station with a total installed capacity of 100MW and a storage system with a total installed capacity of 100MW. C 20MW, Q C 80MWh, 1000Nm 3 Rated power of electrolytic cell P d The optimal working point corresponds to 80% load rate, corresponding to a power of 4.4MW. The lowest hydrogen production load state is 30% load, corresponding to a power of 3.8MW. The power required by the public auxiliary system is P g The power required by the utility system is about 3MW. When the electrolyzer is shut down, the power required by the utility system changes little, so its power needs to be considered as a whole. The number of electrolyzers N is 10. The output curve of the wind and solar power generation system analyzed is as follows: Figure 3 shown.

[0122] Step S1: Collect the real-time wind and solar power output P E , according to the wind and solar real-time output P E The available power of the hydrogen production power system is calculated by the total installed power of the energy storage system P = P E +P C .

[0123] Select time a1 for analysis, at which time the wind power output is P E The available output of the hydrogen power system is P = P E +P C =6+20=26MW.

[0124] Step S101: The available power P of the hydrogen production power system is calculated by N*ηP. d +P gThe comparison is used to determine whether the available power of the hydrogen production power supply system is sufficient to enable each electrolyzer to operate at the optimal power point.

[0125] Since N*η*P d +P g =47MW, that is, P<N*η*P d +P g , execute step S3 (i.e. steps S301 to S307).

[0126] In step S301, the intelligent control center collects wind and solar power output data, predicts the wind and solar power output within a prediction time period (such as n hours), and obtains the total wind and solar power output within the prediction time period.

[0127] In practice, the predicted wind and solar output hours, n, can be determined by combining historical wind and solar output curves, the installed life of the energy storage system, and changes in electrolyzer temperature. In this example, the energy storage system life is 4 hours, and the prediction time is selected as 4 hours. In actual implementation, this number can be adjusted based on the specific project.

[0128] Step S302: Based on the current available power Q of the energy storage system soc And the total wind and solar power output Q during the forecast period E Calculate the total available power Q of the hydrogen power system during the forecast period = Q E +Q soc .

[0129] In this embodiment, the total wind and solar power output Q for 4 hours between a1 and a2 is E The remaining power of the energy storage system at this moment is Q soc If the total available power of the hydrogen production system is 40MWh, then the total available power of the hydrogen production system in 4 hours is Q = Q E +Q soc =55.4+40=95.34MWh.

[0130] Step S303 , calculating the number N1 of electrolytic cells operating at the optimal power point that can be driven by the total available power within the predicted time period.

[0131] In application, N1=(Qn*P g ) / n / (ηP d ).

[0132] From step S302, it can be seen that the total available power Q of the hydrogen production power system a2 to a3 for 4 hours is 95.34MWh. Based on this, the total available power in the predicted time period to support the number of electrolyzers running at the optimal operating point N1 is calculated as (Qn*P g ) / n / (ηP d )=(95.34-12) / 4 / 4.4≈5.

[0133] Step S304: Determine the minimum number of electrolytic cells N2 required to absorb the maximum wind and solar power output according to the maximum power of the wind and solar power output curve.

[0134] In the application, the formula N2 = (maximum wind and solar power output - energy storage charging power - P g ) / P d Calculate N2.

[0135] In this embodiment, N2 = (maximum wind and solar power output - energy storage charging power - P g ) / P d =(59.04-20-3) / 4.7=8.

[0136] Step S305: Determine the size of N1 and N2.

[0137] Step S307: If N1≤N2, then N t =N2-N1.

[0138] In this embodiment, N1=5, N2=8, and thus N can be calculated. t =8-5=3.

[0139] Step S4: Select the electrolytic cell with the current operating power close to the optimal power and the shortest cumulative operating time as the electrolytic cell operating at the optimal power point. The method for selecting N1 electrolytic cells is as follows:

[0140] Calculate the characteristic parameters of the i-th electrolytic cell

[0141] The characteristic parameter d i Sort by small to large and select the characteristic parameter d i The smallest electrolyzer, N1, serves as the electrolyzer operating at the optimal power point;

[0142] Among them, p di is the current operating power of the i-th electrolytic cell, m1 is the influence weight of the electrolytic cell operating power, h i is the cumulative operating time of the i-th electrolytic cell, P d is the rated power supply of a single electrolytic cell, and η is the ratio of the optimal operating power of the electrolytic cell to the rated power.

[0143] Step S5: Select an electrolytic cell with a lower electrolytic cell temperature and a shorter cumulative operating time as the adjustable electrolytic cell. t The selection method of electrolyzer is as follows:

[0144] Calculate the characteristic parameters of the i-th electrolytic cell

[0145] The characteristic parameter t iSort by small to large and select characteristic parameter t i Minimum N t The electrolyzer is used as an adjustable electrolyzer;

[0146] Among them, m2 is the influence weight of electrolytic cell temperature, T i is the temperature of the i-th electrolytic cell, T q is the critical electrolytic cell temperature for hot start, T d is the working temperature of the electrolytic cell, h i is the cumulative operating time of the i-th electrolytic cell.

[0147] The weights m1 and m2 can be analyzed by subjective, objective or a combination of subjective and objective weight analysis. In this embodiment, subjective weight analysis is adopted, and both m1 and m2 are 0.5. d Generally, it is 90℃, the critical electrolytic cell temperature for hot start is selected as 50℃, and i is 1, 2, ..., 10;

[0148] The calculation example is as follows. In this embodiment, there are 10 electrolytic cells, with a maximum operating time of 120 hours and a minimum operating time of 30 hours. The operating power of the i-th electrolytic cell is 4MW, the operating time is 50 hours, and the current temperature is 90°C. The operating power of the i+1-th electrolytic cell is 0MW, the operating time is 35 hours, and the current operating temperature is 60°C. According to the above calculation method, the following is obtained:

[0149]

[0150]

[0151]

[0152]

[0153] Analysis shows that, based on the selection priority, the i-th electrolyzer is preferentially selected to operate near the optimal operating point, and the i+1-th electrolyzer is preferentially selected as an adjustable electrolyzer. This selection strategy effectively reduces electrolyzer power fluctuations. Selecting the i-th electrolyzer reduces fluctuations by 91% compared to selecting the i+1-th electrolyzer to adjust to the optimal operating point. Furthermore, by using a low-temperature electrolyzer, prolonged electrolyzer downtime is avoided, and the temperature drops to the cold start range, increasing the number of electrolyzer starts and stops.

[0154] Step S6, control the selected N1 electrolytic cells to operate at the optimal power point, control the selected N t The electrolyzer is operated at the lowest power that can produce hydrogen to absorb the excess wind and solar power, and the other electrolyzers are not working. t The operating power of each electrolyzer must be no less than the minimum power for hydrogen production to maintain safe and stable operation of the electrolyzer.

[0155] In this embodiment, five electrolyzers are operated at the optimal operating point, i.e., 80% load, and the power required for each electrolyzer is approximately 4.4MW. Three electrolyzers are operated at the minimum operating point for hydrogen production, i.e., 30% load, and the power required is approximately 3.8MW. The total power required is 5*4.4+3*3.8=33.4MW. When the same hydrogen production is evenly distributed among 10 electrolyzers, the operating load of each electrolyzer is approximately 51.5%, and the power required for each electrolyzer is approximately 4.12MW. At this time, the total power required is 41.2MW. The control strategy of the present invention can reduce energy consumption by approximately 19%.

[0156] Step S7: Calculate the target output curve of the energy storage system.

[0157] In application, the target output curve of the energy storage system includes:

[0158] According to the formula P SE =P e -P q Calculate and obtain target output data of multiple energy storage systems;

[0159] Obtaining a target output curve of the energy storage system according to the target output data of the plurality of energy storage systems, wherein the curve can be obtained by simultaneously drawing the target output data of the plurality of energy storage systems by using data fitting or the like;

[0160] Among them, P e is the wind and solar output curve data within the forecast period, P q To predict the power load of the water electrolysis hydrogen production system within the time period, P SE Contribute to the energy storage system goals.

[0161] Step S8: Analyze the target output of the energy storage system or the target output curve of the energy storage system, and formulate target output curves of the power type and energy type energy storage system.

[0162] Step S9: supplying power to the water electrolysis hydrogen production system or auxiliary equipment of the hydrogen production station according to the formulated target output curves of the power-type and energy-type energy storage systems.

[0163] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. An off-grid wind-solar hydrogen storage system, characterized by: The invention comprises a hydrogen production power supply system (1), a power transmission and transformation system (2), a water electrolysis hydrogen production system (3), hydrogen production station auxiliary equipment (4) and an intelligent control center (5), wherein the hydrogen production power supply system (1) comprises an energy storage system power distribution controller (104), a wind and solar power generation system (101) and an energy storage system (102), the water electrolysis hydrogen production system (3) comprises a hydrogen production power distribution controller (301) and an electrolyzer (303), and the hydrogen production power supply system (1) is connected to the water electrolysis hydrogen production system (3), the hydrogen production station auxiliary equipment (4) and the intelligent control center (5) through the power transmission and transformation system (2); The intelligent control center (5) is used to formulate a system operation control strategy according to the power supply status of the hydrogen production power supply system (1), wherein the system operation control strategy comprises calculating the target output of the energy storage system according to the real-time operation data of the system and the wind and solar output forecast data, and determining the number of electrolyzers N1 operating at the optimal power point, the number of adjustable electrolyzers N t , wherein the electrolytic cell operating at the optimal power point is determined at least according to the current operating power of the electrolytic cell and the cumulative operating time of the electrolytic cell, and the number of adjustable electrolytic cells N t The determination is based on at least the current temperature of the electrolytic cell, the hot start critical electrolytic cell temperature, the electrolytic cell operating temperature, and the accumulated operating time of the electrolytic cell; The hydrogen production power distribution controller (301) is used to control the selected N1 electrolyzers to operate at the optimal power point, and to control the selected N t The electrolyzer is operated at least at the minimum power to produce hydrogen; The energy storage system power distribution controller (104) is used to formulate an energy storage system target output curve according to the energy storage system target output, and to supply power to the water electrolysis hydrogen production system (3) or the hydrogen production station auxiliary equipment (4) according to the energy storage system target output curve; When the available power of the hydrogen production power supply system (1) is insufficient to operate each electrolyzer at the optimal power point, the number of electrolyzers N1 operating at the optimal power point and the number of adjustable electrolyzers N are determined based on the real-time operation data of the system and the wind and solar output forecast data. t , and select the electrolytic cell with the current operating power close to the optimal power and the shortest cumulative operating time as the electrolytic cell operating at the optimal power point, select the electrolytic cell with the lower electrolytic cell temperature and the shortest cumulative operating time as the adjustable electrolytic cell, and the remaining electrolytic cells are not working; The method for selecting an electrolyzer whose current operating power is close to the optimal power and whose cumulative operating time is short as the electrolyzer operating at the optimal power point is: Calculate the characteristic parameters of the i-th electrolytic cell The characteristic parameter d i Sort by small to large and select the characteristic parameter d i The smallest electrolyzer, N1, serves as the electrolyzer operating at the optimal power point; Among them, p di is the current operating power of the i-th electrolytic cell, m1 is the influence weight of the electrolytic cell operating power, h i is the cumulative operating time of the i-th electrolytic cell, P d is the rated power of a single electrolytic cell, and η is the ratio of the optimal operating power of the electrolytic cell to the rated power; The method of selecting an electrolytic cell with a lower electrolytic cell temperature and a shorter cumulative operating time as the adjustable electrolytic cell is: Calculate the characteristic parameters of the i-th electrolytic cell The characteristic parameter t i Sort by small to large and select characteristic parameter t i Minimum N t The electrolyzer is used as an adjustable electrolyzer; Among them, m2 is the influence weight of electrolytic cell temperature, T i is the current temperature of the i-th electrolytic cell, T q is the critical electrolytic cell temperature for hot start, T d is the working temperature of the electrolytic cell, h i is the cumulative operating time of the i-th electrolytic cell.

2. The off-grid wind-solar hydrogen storage system according to claim 1 is characterized in that: The power transmission and transformation system (2) includes a second power transmission and transformation system (201) and a third power transmission and transformation system (202); the hydrogen production power supply system (1) includes a wind-solar power generation system (101), an energy storage system power distribution controller (104), and a plurality of subsystems, each of which includes an energy storage system (102) and a first power transmission and transformation system (103); the wind-solar power generation system (101) is connected to each of the first power transmission and transformation systems (103) via the energy storage system power distribution controller (104); 3), the other end of the first power transmission and transformation system (103) is connected to the energy storage system (102), the wind-solar power generation system (101) and the energy storage system power distribution controller (104) are connected to the input end of the water electrolysis hydrogen production system (3) through the second power transmission and transformation system (201), and the wind-solar power generation system (101) and the energy storage system power distribution controller (104) are connected to the input end of the hydrogen production station auxiliary equipment (4) through the third power transmission and transformation system (202); The water electrolysis hydrogen production system (3) includes a hydrogen production power distribution controller (301), one or more power conversion systems (302), and one or more electrolyzers (303). The power conversion systems (302) and the electrolyzers (303) are arranged in a one-to-one correspondence. The input end of the power conversion system (302) is connected to the output end of the hydrogen production power distribution controller (301), and the output end of the power conversion system (302) is connected to the input end of the electrolyzer (303).

3. The off-grid wind-solar hydrogen storage system according to claim 1, characterized in that: The intelligent control center (5) formulates a system operation control strategy according to the power supply status of the hydrogen production power supply system (1), including: When the available power of the hydrogen production power supply system (1) is sufficient to enable each electrolyzer to operate at an optimal power point, the target output of the energy storage system is calculated, and according to the target output of the energy storage system, the hydrogen production power supply system (1) provides direct current to the electrolyzer of the water electrolysis hydrogen production system and provides alternating current to the auxiliary equipment (4) of the hydrogen production station. Each electrolyzer operates at an optimal power point, and excess electricity is stored in the energy storage system (102).

4. A control method for an off-grid wind-solar hydrogen storage system according to any one of claims 1 to 3, characterized in that: include: Collecting the real-time output of wind and solar power, and calculating the available power of the hydrogen production power system based on the real-time output of wind and solar power and the total installed power of the energy storage system; If the available power of the hydrogen production power supply system is sufficient to enable each electrolyzer to operate at the optimal power point, the target output of the energy storage system is calculated; If the available power of the hydrogen production power supply system is insufficient to operate each electrolyzer at the optimal power point, the number of electrolyzers N1 operating at the optimal power point and the number of adjustable electrolyzers N are determined based on the real-time operation data of the system and the wind and solar output forecast data. t ; Select the electrolyzer whose current operating power is close to the optimal power and whose cumulative operating time is short as the electrolyzer operating at the optimal power point; Select an electrolytic cell with a lower electrolytic cell temperature and a shorter cumulative operating time as an adjustable electrolytic cell; Control the selected N1 electrolyzer to operate at the optimal power point, control the selected N t The electrolyzer is operated at least at the minimum power to produce hydrogen; Calculate the target output curve of the energy storage system; Analyzing the target output of the energy storage system or the target output curve of the energy storage system, and formulating target output curves of power-type and energy-type energy storage systems; Power is supplied to the water electrolysis hydrogen production system or the auxiliary equipment of the hydrogen production station according to the formulated target output curves of the power-type and energy-type energy storage systems.

5. The control method of the off-grid wind-solar hydrogen storage system according to claim 4, characterized in that: The number of electrolytic cells N1 and the number of adjustable electrolytic cells N1 operating at the optimal power point are determined based on the real-time operation data of the system and the wind and solar output forecast data. t include: Predicting the output of wind and solar power within a prediction period to obtain the total output power of wind and solar power within the prediction period; Calculate the total available power of the hydrogen production power system during the forecast period based on the current remaining available power of the energy storage system and the total wind and solar power output during the forecast period; Calculate the number of electrolyzers N1 that can be driven by the total available electricity in the forecast period and operate at the optimal power point; According to the maximum power of the wind and solar output curve, determine the minimum number of electrolyzers N2 required to absorb the maximum wind and solar output, and determine the adjustable number of electrolyzers N based on N1 and N2. t ; Among them, when N1>N2, N t is 0; when N1≤N2, N t =N2-N1.

6. The control method of the off-grid wind-solar hydrogen storage system according to claim 4, characterized in that: The method for selecting an electrolyzer whose current operating power is close to the optimal power and whose cumulative operating time is short as the electrolyzer operating at the optimal power point is: Calculate the characteristic parameters of the i-th electrolytic cell The characteristic parameter d i Sort by small to large and select the characteristic parameter d i The smallest electrolyzer, N1, serves as the electrolyzer operating at the optimal power point; Among them, p di is the current operating power of the i-th electrolytic cell, m1 is the influence weight of the electrolytic cell operating power, h i is the cumulative operating time of the i-th electrolytic cell, P d is the rated power supply of a single electrolytic cell, and η is the ratio of the optimal operating power of the electrolytic cell to the rated power.

7. The control method of the off-grid wind-solar hydrogen storage system according to claim 4, characterized in that: The method of selecting an electrolytic cell with a lower electrolytic cell temperature and a shorter cumulative operating time as the adjustable electrolytic cell is: Calculate the characteristic parameters of the i-th electrolytic cell The characteristic parameter t i Sort by small to large and select characteristic parameter t i Minimum N t The electrolyzer is used as an adjustable electrolyzer; Among them, m2 is the influence weight of electrolytic cell temperature, T i is the current temperature of the i-th electrolytic cell, T q is the critical electrolytic cell temperature for hot start, T d is the working temperature of the electrolytic cell, h i is the cumulative operating time of the i-th electrolytic cell.

8. The control method of the off-grid wind-solar hydrogen storage system according to claim 4, characterized in that: The method for calculating the target output of the energy storage system includes: According to the formula P SE =P E -P Q Calculate the target output P of the energy storage system SE , where P E To provide real-time power for wind and solar power, P Q is the power of the water electrolysis hydrogen production system; The method for calculating the target output curve of the energy storage system includes: According to the formula P SE =P e -P q Calculate and obtain target output data of multiple energy storage systems; Obtaining a target output curve of the energy storage system according to the plurality of target output data of the energy storage system; Among them, P e is the wind and solar output curve data within the forecast period, P q is the target power load of the water electrolysis hydrogen production system within the forecast period, P SE Contribute to the energy storage system goals.

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