Electricity-hydrogen storage integrated system planning method and system considering SOC (State of Charge) cross-day change

Abstract

The invention discloses an electricity-hydrogen storage integrated system planning method and system considering SOC cross-day change, and relates to the technical field of integration and optimization of renewable energy sources and energy storage systems, and the method comprises the steps: collecting first planning data, and carrying out the power production simulation; determining the working position and scale of the hydrogen production equipment through a first initialization method; and constructing a first objective function, setting a first constraint condition, arranging a working position by adopting an SOC change method, and solving a novel energy storage planning scheme. The method can break through the constraint on SOC intraday balance in a traditional planning method, charge and discharge utilization energy storage and hydrogen energy adjustment capability, configures multi-time scale energy storage and hydrogen energy in a mode of lowest construction operation cost, improves the utilization rate of new energy, supports the construction of a novel electric power system, realizes the cross-day change of the energy storage SOC, can give full play to the adjustment effect, and has a good application prospect. Meanwhile, the method based on 8760-hour power production simulation has engineering practicability.

Description

Technical Field

[0001] The present invention relates to the technical field of integration and optimization of renewable energy and energy storage systems, and specifically relates to a planning method and system for an integrated electricity-hydrogen energy storage system considering the cross-day change of SOC. Background Art

[0002] With the construction and development of a new power system and the large-scale access of new energy, the demand for flexible resources in the system becomes increasingly obvious. Energy storage and hydrogen energy can effectively improve the characteristics of new energy power generation, promote the balance of power sources and loads in the system, provide capacity support for the power system, and improve the safety, economy and flexibility of system operation. They are key technologies to support the construction of a new power system and the grid connection and consumption of a high proportion of new energy.

[0003] Existing technologies mostly consider the intra-day balance of energy storage SOC and lack the consideration of the cross-day change of energy storage SOC, making it difficult to fully play the regulating role of energy storage. In addition, the existing technology models are complex and not conducive to engineering practical applications.

[0004] The invention with the authorized publication number of CN 113078737 B proposes a planning method for a hybrid energy storage system based on a three-dimensional time scale. First, the hybrid energy storage system is divided into three levels according to the time scale characteristics of the hybrid energy storage system, namely seasonal periodic energy storage, weekly periodic, and daily periodic energy storage; considering the operation constraints of the three-level energy storage and the DC power flow security constraints, with the minimum total planning cost of the hybrid energy storage system as the objective function, a three-dimensional time scale mixed-integer linear programming model of the hybrid energy storage system is constructed; then it is directly solved by a commercial solver. Based on 8760-hour power production simulation, the present invention considers the cross-day change of SOC for charging and discharging, constructs a double-layer planning model of energy storage and hydrogen energy with the optimal construction and operation and maintenance cost as the goal, can break through the intra-day balance constraint of energy storage SOC, give full play to the charging and discharging capacity of energy storage, and obtain an optimal configuration plan for the integrated electricity-hydrogen energy storage system under the guarantee of new energy consumption. Summary of the Invention

[0005] In view of the above existing problems, the present invention proposes a planning method for an integrated electricity-hydrogen energy storage system considering the cross-day change of SOC in the scenario of new energy curtailment for hydrogen production. Based on power production simulation, the charging and discharging space of energy storage and the application space of electrolytic hydrogen considering the cross-day change of SOC are quantitatively obtained, and a double-layer planning model of energy storage and hydrogen energy with the optimal construction and operation and maintenance cost as the goal is constructed, and the planning configuration plan of the integrated electricity-hydrogen energy storage system is obtained by solving.

[0006] To solve the above technical problems, a planning method for an integrated electricity-hydrogen energy storage system considering the cross-day change of SOC is proposed, including,

[0007] Collect the first planning data and conduct power production simulation; determine the working location and scale of the hydrogen production equipment through the first initialization method; construct the first objective function, set the first constraint conditions, and arrange the working location using the SOC change method to solve the new energy storage planning scheme.

[0008] As a preferred embodiment of the integrated power-hydrogen-energy storage system planning method considering the cross-day change of SOC according to the present invention, wherein: the first planning data includes the first planning data of the planning year within the planning area and the unit efficiency data collected.

[0009] As a preferred embodiment of the integrated power-hydrogen-energy storage system planning method considering the cross-day change of SOC according to the present invention, wherein: the power production simulation includes obtaining the first operation curve and the corresponding power supply planning scheme through the first planning data, conducting power production simulation, and analyzing the new energy abandonment amount and load gap in the planning year.

[0010] As a preferred embodiment of the integrated power-hydrogen-energy storage system planning method considering the cross-day change of SOC according to the present invention, wherein: the first initialization method includes initializing the first planning data using the first initialization method, and determining the working location of the hydrogen production equipment and the scale of the hydrogen production equipment by judging the magnitudes of the first production amount and the first demand amount.

[0011] As a preferred embodiment of the integrated power-hydrogen-energy storage system planning method considering the cross-day change of SOC according to the present invention, wherein: the first objective function includes determining the first objective function:

[0012]

[0013] Wherein, C ES,p and C ES,s respectively represent the unit installed capacity investment cost and the unit capacity investment cost of the energy storage, P ES and S ES respectively represent the planned installed capacity power and energy of the energy storage, d represents the discount rate, y represents the service life of the energy storage, and C MO represents the unit capacity operation and maintenance cost of the energy storage;

[0014] Set the first constraint conditions:

[0015]

[0016] ΔP = 0

[0017] Wherein, E a is the new energy abandonment amount, E nes is the available new energy amount, R is the upper limit of the new energy abandonment rate, and ΔP is the load gap;

[0018] Construct an energy storage planning model based on the first objective function and the first constraint condition.

[0019] As a preferred solution of the integrated power-hydrogen-energy storage system planning method considering the cross-day change of SOC described in the present invention, wherein: the SOC change method includes arranging the working positions of new energy storage considering the cross-day change of SOC, deducting the new energy curtailment for hydrogen production, the new energy curtailment and load gap after deducting the new energy curtailment for hydrogen production, and the adjustable power of conventional power sources, and initializing through the first initialization method, and judging the positive and negative values of the new energy curtailment. When the new energy curtailment is positive, energy storage charging is carried out.

[0020] When the new energy curtailment is negative, energy storage discharging is carried out, and at the same time, it is judged whether the first energy storage energy meets the first requirement.

[0021] As a preferred solution of the integrated power-hydrogen-energy storage system planning method considering the cross-day change of SOC described in the present invention, wherein: the SOC change method further includes calculating the new energy curtailment and load gap when judging whether the first energy storage energy meets the first requirement, solving the energy storage planning model, and obtaining a new energy storage planning scheme.

[0022] Another object of the present invention is to provide an integrated power-hydrogen-energy storage system planning system considering the cross-day change of SOC. The present invention simulates power production, collects and analyzes influencing factors (such as power source planning, load forecasting, and hydrogen demand) to reduce the new energy curtailment phenomenon, realize the effective utilization of curtailment, reduce production costs, increase the hydrogen production, optimize the investment and operation and maintenance costs of power energy storage, ensure the consumption of new energy and the stable supply of power. By considering the cross-day change of SOC (State of Charge), a flexible energy storage scheme is designed to adapt to the power supply fluctuations at different times and alleviate the load gap problem.

[0023] As a preferred solution of the integrated power-hydrogen-energy storage system planning system considering the cross-day change of SOC described in the present invention, it is characterized in that it includes a power production simulation module, a position and scale determination module, and a new energy storage planning module;

[0024] The power production simulation module collects the first planning data and conducts power production simulation;

[0025] The position and scale determination module determines the working position and scale of the hydrogen production equipment through the first initialization method;

[0026] The new energy storage planning module constructs the first objective function, sets the first constraint condition, arranges the working position by using the SOC change method, and solves the new energy storage planning scheme.

[0027] A computer device includes a memory and a processor. The memory stores a computer program. It is characterized in that when the processor executes the computer program, the steps of the method for planning an integrated electricity-hydrogen-storage system considering the cross-day change of SOC are implemented.

[0028] A computer-readable storage medium stores a computer program. It is characterized in that when the computer program is executed by a processor, the steps of the method for planning an integrated electricity-hydrogen-storage system considering the cross-day change of SOC are implemented.

[0029] Advantages of the present invention: The present invention proposes a method for planning an integrated electricity-hydrogen-storage system considering the cross-day change of SOC in the scenario of new energy curtailment for hydrogen production. By applying the method proposed by the present invention for planning the integrated electricity-hydrogen-storage system, it is possible to break through the constraint of SOC intra-day balance in traditional planning methods, make full use of the charging and discharging and hydrogen energy regulation capabilities, configure multi-time-scale energy storage and hydrogen energy in the way with the lowest construction and operation cost, improve the utilization rate of new energy, and support the construction of a new power system. The proposed method realizes the cross-day change of the energy storage SOC, can give full play to its regulation role, and at the same time, the method based on the 8760-hour power production simulation has engineering practicability. Description of the Drawings

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0031] Figure 1 It is the overall flowchart of the method for planning an integrated electricity-hydrogen-storage system considering the cross-day change of SOC provided by an embodiment of the present invention.

[0032] Figure 2 It is a schematic diagram of new energy curtailment, load gap and adjustable power of conventional power sources for the method for planning an integrated electricity-hydrogen-storage system considering the cross-day change of SOC provided by an embodiment of the present invention.

[0033] Figure 3 It is a schematic diagram of new energy curtailment, load gap and adjustable power of conventional power sources after deducting hydrogen production from curtailment for the method for planning an integrated electricity-hydrogen-storage system considering the cross-day change of SOC provided by an embodiment of the present invention.

[0034] Figure 4 It is a system scheme module diagram of the system for planning an integrated electricity-hydrogen-storage system considering the cross-day change of SOC provided by an embodiment of the present invention. Detailed Embodiments

[0035] To make the above objects, features, and advantages of the present invention more apparent and understandable, the following provides a detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings of the specification. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0036] In the following description, many specific details are set forth to facilitate a thorough understanding of the present invention. However, the present invention may be implemented in other ways different from those described herein. Those skilled in the art can make similar generalizations without departing from the spirit of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0037] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation manner of the present invention. The appearances of "in one embodiment" in different places in this specification do not all refer to the same embodiment, nor are they embodiments that are mutually exclusive individually or selectively with other embodiments.

[0038] The present invention is described in detail in conjunction with schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views showing the device structure will be enlarged locally in a non-general proportion, and the schematic diagrams are only examples and should not limit the scope of protection of the present invention herein. In addition, in actual production, three-dimensional spatial dimensions including length, width, and depth should be included.

[0039] At the same time, in the description of the present invention, it should be noted that the orientation or positional relationships indicated by terms such as "upper, lower, inner, and outer" are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first, second, or third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0040] Unless otherwise clearly specified and defined in the present invention, the terms "installed, connected, and coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can also be a mechanical connection, an electrical connection, or a direct connection, or can be indirectly connected through an intermediate medium, or can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] Example 1, referring to Figures 1-3 , which is the first embodiment of the present invention. This embodiment provides a planning method for an integrated electric-hydrogen energy storage system considering the cross-day variation of SOC, including:

[0042] In the scenario of hydrogen production by abandoning electricity in new energy,

[0043] S1: Collect the first planning data and conduct power production simulation.

[0044] Specifically, collect the first planning data and unit efficiency data for the planned year in the planned area.

[0045] Among them, the first planning data includes but is not limited to the power source planning scheme, load forecast data, and green hydrogen demand forecast data for the planned year in the planned area, including the installed capacity and capacity of various power sources, the operation benchmark curves of wind power and photovoltaic power, and the annual electricity consumption, maximum load, load forecast benchmark curve, and green hydrogen demand.

[0046] Furthermore, the unit efficiency data includes obtaining the installed capacity of energy storage units, the investment cost per unit capacity, the operation and maintenance cost per unit capacity, and the charge and discharge efficiency.

[0047] It should also be noted that in the embodiment of the present application, the steps of conducting power production simulation are as follows:

[0048] Obtain the first operation curve and the corresponding power source planning scheme through the first planning data;

[0049] The first operation curve includes the operation curves of wind power, photovoltaic power, and load;

[0050] Based on the operation curves of wind power, photovoltaic power, and load and the corresponding power source planning scheme, conduct power production simulation to obtain the new energy abandoned electricity, load gap, and adjustable electricity of conventional power sources for each hour of the planned year, as Figure 2 shown, t c,i is the continuous abandonment duration of new energy for the i-th segment, t d,i is the continuous duration of the load gap and adjustable electricity of conventional power sources for the i-th segment, m is the number of continuous new energy abandoned electricity periods, and n is the number of continuous periods of the load gap and adjustable electricity of conventional power sources.

[0051] S2: Determine the working position and scale of the hydrogen production equipment through the first initialization method.

[0052] Furthermore, use the first initialization method to initialize the first planning data, and judge the size of the first output and the first demand to determine the working position of the hydrogen production equipment and the scale of the hydrogen production equipment.

[0053] The first initialization method can be a method of gradually covering the abandoned electricity of new energy, or a linear interpolation algorithm, or other methods that can determine the working position and scale of the hydrogen production equipment based on the abandoned electricity of new energy.

[0054] The first output includes the green hydrogen output, and the first demand includes the annual green hydrogen demand.

[0055] It should be noted that in the embodiment of the present application, the first initialization method determines the working position and scale of the hydrogen production equipment by gradually covering the amount of abandoned new - energy power. The specific steps are as follows:

[0056] S2.1: Initialize the green - hydrogen production volume Hc = 0, the annual green - hydrogen demand H, and the number of new - energy hydrogen - production time periods i = 0;

[0057] S2.2: From the longest continuous new - energy power - abandonment duration t c,max The corresponding new - energy abandoned power E c,max is used for hydrogen production, Hc = Hc + E c,max , i = i + 1. Remove the corresponding new - energy abandoned - power histogram, and record the new - energy abandoned power per hour in the set P; Figure 2 in the

[0058] S2.3: Judge the magnitude relationship between Hc and H. If Hc < H, go to step S2.4; otherwise, go to step S2.5;

[0059] S2.4: Judge the magnitude relationship between i and m. If i < m, return to step S2.2; otherwise, go to step S2.5;

[0060] S2.5: Take the maximum power P in the set P max as the scale of the hydrogen - production equipment.

[0061] S3: Construct the first objective function, set the first constraint condition, and arrange the working position by using the SOC change method to solve the new - type energy - storage planning scheme.

[0062] Specifically, construct an energy - storage planning model according to the first objective function and the first constraint condition.

[0063] The first objective function can be the objective of minimizing the energy - storage investment and operation - maintenance cost, or the objective of maximizing the charge - discharge efficiency of the system.

[0064] The first constraint condition can be the constraint method for new - energy consumption and power supply guarantee, or the constraint method that the energy storage capacity of the energy - storage device cannot exceed its maximum capacity, or the constraint method considering efficiency loss in the charge - discharge process of the energy storage, or the constraint method for matching the new - energy abandoned power and the load gap.

[0065] Furthermore, in the embodiment of the present application, taking the minimum energy - storage investment and operation - maintenance cost as the first objective function and the first constraint condition of new - energy consumption and power supply guarantee, construct an energy - storage planning model. The specific steps are as follows:

[0066] In this step, the planning model is expressed as follows.

[0067] Taking the minimum investment and operation - maintenance cost as the objective function is expressed as:

[0068]

[0069] Among them, C ES,p and C ES,s respectively represent the unit installed capacity investment cost and the unit capacity investment cost of energy storage, P ES and S ES respectively represent the planned installed power and energy of energy storage, d represents the discount rate, y represents the service life of energy storage, and C MO represents the unit capacity operation and maintenance cost of energy storage;

[0070] Taking the new energy curtailment rate and the power gap satisfaction condition as constraints, it is expressed as:

[0071]

[0072] ΔP = 0

[0073] Among them, E a is the new energy curtailment amount, E nes is the available new energy power, R is the upper limit of the new energy curtailment rate, and ΔP is the load gap.

[0074] It should also be noted that in an alternative embodiment, the SOC change method is used to solve the new energy storage planning scheme. The specific steps are as follows:

[0075] Consider the SOC cross-day change to arrange the working position of the new energy storage, deduct the new energy curtailment and the load gap and the adjustable power of the conventional power source after the new energy curtailment is used for hydrogen production, and initialize through the first initialization method to judge the positive and negative values of the new energy curtailment amount:

[0076] (1) Deduct the new energy curtailment and the load gap and the adjustable power of the conventional power source after the new energy curtailment is used for hydrogen production. As Figure 3 shown, initialize the new energy storage scale P ES , duration t ES and capacity E ES , charge and discharge efficiency r, and the cycle time t = 1 through the first initialization method.

[0077] (2) Record the charge and discharge space of the new energy storage at each moment, where the new energy curtailment amount is recorded as a positive value.

[0078] Pt = P a t

[0079] Among them, P a t is the new energy curtailment power at time t.

[0080] The load gap and the adjustable power of the conventional power source are recorded as negative values.

[0081] Pt = Pl t + P s t

[0082] where P l t is the load gap, and P s t is the adjustable power of conventional power sources.

[0083] When there is no moment of new - energy curtailment, load gap, and adjustable power of conventional power sources, P_t is 0.

[0084] (3) Initialize the real - time energy E of the new - type energy storage ES 0 = 0.5E ES ;

[0085] (4) Judge the sign of P_t. If P_t > 0, the energy storage is charged, E ES t = E ES t - 1+P_t×r, P_t = 0. If P_t < 0, the energy storage is discharged, E ES t = E ES t - 1+P_t / r, P_t = 0. If P_t = 0, E ES t = E ES t - 1.

[0086] (5) In an alternative embodiment, judge whether the first - energy storage energy, i.e., the new - type energy - storage capacity, meets the first requirement, which is the capacity - boundary requirement. If E ES t > E ES , P_t = E ES t - E ES , E ES t = E ES . If E ES t < 0, judge the magnitude relationship between E ES t and P s t. If E ES t > P s t, let P l t = 0, E ES t = 0. Otherwise, P l t = P_t - E ES t, E ES t = 0.

[0087] (6) t = t + 1. If t > 8760, go to step (7); otherwise, return to step (4);

[0088] (7) Calculate the new - energy curtailment:

[0089]

[0090] (8) Calculate the load gap:

[0091] ΔP = min{P l t}

[0092] (9) Solve the energy storage planning model to obtain a new energy storage planning solution.

[0093] Example 2, the second example of the present invention, which is different from the previous two examples in that:

[0094] If the described function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes: USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs, etc., which can store program codes.

[0095] The logic and / or steps represented in the flowchart or described in other ways herein, for example, can be considered as a definite sequence list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processor, or other systems that can fetch and execute instructions from the instruction execution system, apparatus, or device), or in combination with these instruction execution systems, apparatus, or devices. For the purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.

[0096] More specific examples (non-exhaustive list) of computer-readable media include the following: an electrical connection part with one or more wirings (electronic device), a portable computer disk cartridge (magnetic device), random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium can even be paper or other suitable media on which the program can be printed, because the program can be obtained electronically, for example, by optically scanning the paper or other media, then editing, interpreting, or processing it in other suitable ways as necessary, and then storing it in a computer memory.

[0097] It should be understood that each part of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, any one or a combination of the following techniques well known in the art can be used: discrete logic circuits with logic gate circuits for implementing logical functions on data signals, application specific integrated circuits with suitable combinational logic gate circuits, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), etc.

[0098] Embodiment 3, referring to Figure 4 , which is the third embodiment of the present invention. This embodiment provides an integrated power-hydrogen-energy storage system planning system considering the cross-day change of SOC, including a power production simulation module, a location and scale determination module, and a new energy storage planning module;

[0099] The power production simulation module collects the first planning data and conducts power production simulation;

[0100] The location and scale determination module determines the working location and scale of the hydrogen production equipment through the first initialization method;

[0101] The new energy storage planning module constructs the first objective function, sets the first constraint conditions, arranges the working location using the SOC change method, and solves the new energy storage planning scheme.

[0102] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A method for planning an integrated power-to-hydrogen-and-energy-storage system considering the cross-day variation of the SOC, characterized in that: including collecting first planning data and performing power production simulation determining the working position and scale of the hydrogen production equipment through the first initialization method constructing a first objective function, setting first constraint conditions, arranging the working position by using the SOC change method, and solving the new energy storage planning scheme 2. The integrated power-to-hydrogen-and-storage system planning method considering the cross-day variation of SOC according to claim 1, wherein: The first planning data includes collecting the first planning data and unit efficiency data of the planning year within the planning area 3. The method for planning an integrated electricity-hydrogen energy storage system considering the cross-day variation of SOC according to claim 2, wherein: The power production simulation includes obtaining the first operation curve and the corresponding power source planning scheme through the first planning data, performing power production simulation, and analyzing the new energy abandonment amount and load gap in the planning year 4. The integrated power-to-hydrogen-and-storage system planning method considering the cross-day variation of SOC according to claim 3, characterized in that: The first initialization method includes initializing the first planning data by using the first initialization method, and judging the magnitude of the first output and the first demand to determine the working position of the hydrogen production equipment and the scale of the hydrogen production equipment 5. The integrated power-to-hydrogen storage system planning method considering the cross-day variation of SOC according to claim 4, characterized in that: The first objective function includes determining the first objective function Among them, C ES,p and C ES,s represent the unit installed capacity investment cost and the unit capacity investment cost of energy storage respectively, P ES and S ES represent the planned installed power and energy of energy storage respectively, d represents the discount rate, y represents the service life of energy storage, and C MO represents the unit capacity operation and maintenance cost of energy storage; Setting the first constraint condition ΔP = 0 Among them, E a is the amount of abandoned new energy power, E nes is the available amount of new energy power, R is the upper limit of the new energy power abandonment rate, and ΔP is the load gap; and constructing an energy storage planning model according to the first objective function and the first constraint condition 6. The integrated power-to-hydrogen storage system planning method considering the cross-day variation of SOC according to claim 5, characterized in that: The SOC change method includes arranging the working position of the new energy storage considering the cross-day change of SOC, deducting the new energy abandonment and load gap and the adjustable power of the conventional power source after hydrogen production from the new energy abandonment, and initializing through the first initialization method, judging the positive and negative values of the new energy abandonment amount. When the new energy abandonment amount is positive, energy storage charging is performed When the new energy abandonment amount is negative, energy storage discharging is performed, and at the same time, it is judged whether the first energy storage energy meets the first requirement 7. The method for planning an integrated power-to-hydrogen storage system considering the cross-day variation of SOC according to claim 6, characterized in that: The SOC change method further includes calculating the new energy abandonment amount and load gap when the first energy storage energy meets the first requirement, solving the energy storage planning model, and obtaining the new energy storage planning scheme 8. A system adopting the method for planning an integrated power-to-hydrogen-and-storage system considering the cross-day variation of SOC as described in any one of claims 1 to 7, characterized in that: including a power production simulation module, a position and scale determination module, and a new energy storage planning module The power production simulation module collects the first planning data and performs power production simulation The position and scale determination module determines the working position and scale of the hydrogen production equipment through the first initialization method The new energy storage planning module constructs a first objective function, sets first constraint conditions, arranges the working position by using the SOC change method, and solves the new energy storage planning scheme 9. A computer device, comprising a memory and a processor, the memory storing a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the integrated power-hydrogen-energy storage system planning method considering the cross-day change of SOC according to any one of claims 1 to 7 10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steps of the integrated power-hydrogen-energy storage system planning method considering the cross-day change of SOC according to any one of claims 1 to 7

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