Sea island off-grid type hydrogen energy comprehensive energy system planning method, equipment and medium

Abstract

The invention relates to an island off-grid hydrogen energy integrated energy system planning method, equipment and a medium. The method comprises the following steps: S1, obtaining a normalized output characteristic curve of wind power and photovoltaic power generation equipment of an integrated energy system within a preset time, and an electrical load and thermal load characteristic curve; and S2, based on the electrical load characteristic curve, determining the installation scale of the wind power and photovoltaic power generation equipment. And S3, determining the scale of the hydrogen fuel cell according to the thermal load characteristic curve. And S4, calculating the capacity of the electrolytic cell by combining the wind power and photovoltaic normalized output characteristic curve, the installation scale and the electrical load characteristic curve. And S5, determining the installation scale and operation characteristics of electrochemical energy storage in the integrated energy system. And S6, judging whether the wind power and photovoltaic installation scale is reasonable or not, if so, executing S7, and otherwise, returning to S2 for adjustment. And S7, determining the scale of the hydrogen storage tank. According to the invention, efficient complementation of different energy forms is realized, and configuration and operation of the comprehensive energy system are optimized.

Description

Technical Field

[0001] The present invention relates to a planning method, device and medium for an island off-grid hydrogen energy integrated energy system, and belongs to the technical field of integrated energy systems. Background Art

[0002] With the continuous growth of global energy demand and the increasing emphasis on environmental protection, the development and utilization of renewable energy have become an important development direction in the energy field. Due to their unique geographical locations and natural conditions, island areas usually face problems such as unstable traditional energy supply, high energy transportation costs, and relatively large environmental impacts. Therefore, it is of great practical significance to develop an integrated energy system that can make full use of rich renewable energy such as wind energy and solar energy in island areas and achieve energy self-sufficiency by combining hydrogen energy technology.

[0003] As a clean and efficient secondary energy, hydrogen energy has characteristics such as high energy density, strong storability, and environmental friendliness, and is considered one of the key technologies for future energy transformation. The island off-grid hydrogen energy integrated energy system can realize the independent energy supply in island areas by integrating renewable energy power generation equipment such as wind power and photovoltaic power, combining technologies such as electrolytic hydrogen production, hydrogen fuel cell power generation, and electrochemical energy storage, while reducing the dependence on traditional fossil energy and carbon emissions, and has broad application prospects.

[0004] Traditional island energy supply mainly relies on diesel generators or fossil fuels transported from the mainland. These energy supply methods are not only costly, but also easily affected by factors such as weather and transportation conditions, resulting in unstable energy supply. Especially under harsh weather conditions, fuel replenishment is difficult, which is likely to cause energy shortage problems. And traditional energy systems usually only focus on the utilization of a single energy source, such as only using wind energy or solar energy for power generation, while ignoring the complementarity and synergy between different energy forms. This single energy utilization method leads to a low comprehensive energy utilization efficiency and cannot fully exploit the rich renewable energy potential in island areas.

[0005] The patent document with the patent number "CN116579115A" discloses a system planning method and device for the coordinated interaction of electricity and hydrogen. This method is for the coordinated planning of a wider range of power and hydrogen energy systems, lacking targeted design for special requirements in off-grid scenarios. It mainly focuses on the overall optimization during the planning period and considers less the flexibility adjustment during the system operation process. The method has a complex model, involving multiple constraint conditions and optimization objectives. Although it is applicable to large-scale system planning, it may require a relatively high technical threshold and computing resources in actual operation. Summary of the Invention

[0006] To solve the problems existing in the above-mentioned prior art, the present invention proposes a method, device and medium for planning an island off-grid hydrogen energy integrated energy system.

[0007] The technical solution of the present invention is as follows:

[0008] On the one hand, the present invention provides a method for planning an island off-grid hydrogen energy integrated energy system, including the following steps:

[0009] S1. Obtain the normalized output characteristic curve of the wind power generation equipment and the normalized output characteristic curve of the photovoltaic power generation equipment of the integrated energy system for a preset time, as well as the electrical load characteristic curve and the heat load characteristic curve of the integrated energy system for a preset time;

[0010] S2. Determine the installed capacity of the wind power generation equipment and the photovoltaic power generation equipment of the integrated energy system according to the electrical load characteristic curve;

[0011] S3. Determine the scale of the hydrogen fuel cell according to the heat load characteristic curve;

[0012] S4. Determine the capacity of the electrolyzer according to the normalized output characteristic curve of the wind power generation equipment, the normalized output characteristic curve of the photovoltaic power generation equipment, the installed capacity of the wind power generation equipment and the photovoltaic power generation equipment, and the electrical load characteristic curve;

[0013] S5. Determine the installed capacity and operating characteristics of the electrochemical energy storage of the integrated energy system;

[0014] S6. Judge whether the installed capacity of the wind power generation equipment and the photovoltaic power generation equipment meets the requirement that the power generation output is greater than or equal to the power consumption load. If it meets, execute step S7; if not, execute step S2;

[0015] S7. Determine the scale of the hydrogen storage tank of the integrated energy system.

[0016] As a preferred embodiment, the normalized output characteristic curve of the wind power generation equipment is expressed as:

[0017] ε wind =f wind (t);

[0018] Wherein, ε wind represents the normalized output of the wind power, and f wind (t) represents the variation function of the normalized output of the wind power with the preset time t;

[0019] The normalized output characteristic curve of the photovoltaic power generation equipment is expressed as:

[0020] ε pv =f pv (t);

[0021] Wherein, εpv represents the normalized output of the photovoltaic, f pv (t) represents the function of the normalized output of the photovoltaic varying with the preset time t;

[0022] The electric load characteristic curve is expressed as:

[0023] P electricity = f electricity (t);

[0024] where, P electricity represents the electric load, f electricity (t) represents the function of the electric load varying with the preset time t;

[0025] The heat load characteristic curve is expressed as:

[0026] P heat = f heat (t);

[0027] where, P heat represents the heat load, f heat (t) represents the function of the heat load varying with the preset time t.

[0028] As a preferred embodiment, the constraint conditions for the installed capacities of the wind power generation equipment and the photovoltaic power generation equipment are expressed as:

[0029]

[0030] where, Q wind represents the installed capacity of the wind power generation equipment, Q pv represents the installed capacity of the photovoltaic power generation equipment, max() represents the maximum value function, and h represents the time variable.

[0031] As a preferred embodiment, the constraint conditions for the scale of the hydrogen fuel cell are expressed as:

[0032]

[0033] where, represents the thermal efficiency of the hydrogen fuel cell, represents the electrical efficiency of the hydrogen fuel cell, represents the total efficiency of the hydrogen fuel cell;

[0034] The output power of the hydrogen fuel cell is expressed as:

[0035]

[0036] where, represents the function of the output power of the hydrogen fuel cell varying with the preset time t;

[0037] The scale of the hydrogen fuel cell is expressed as:

[0038]

[0039] Wherein, represents the installed scale of the hydrogen fuel cell expressed in electric power, represents the electrical output power of the hydrogen fuel cell, represents the function of the electrical output power of the hydrogen fuel cell changing with the preset time t.

[0040] As a preferred embodiment, the constraint conditions of the operating characteristics of the electrolyzer are expressed as:

[0041]

[0042] Wherein, P electrolysor represents the load characteristics of the electrolyzer, and η electrolysor represents the electrolyzer efficiency;

[0043] The load characteristics P of the electrolyzer electrolysor are expressed as:

[0044] P electrolysor = f electrolysor (t);

[0045] Wherein, f electrolysor (t) represents the function of the load characteristics of the electrolyzer changing with the preset time t;

[0046] The constraint conditions of the capacity of the electrolyzer are expressed as:

[0047] Q electrolysor ≥ max(P electrolysor );

[0048] Wherein, Q electrolysor represents the capacity of the electrolyzer.

[0049] As a preferred embodiment, the installed scale of the electrochemical energy storage is expressed as:

[0050]

[0051] Wherein, Q store_e represents the installed scale of the electrochemical energy storage;

[0052] The energy storage capacity C of the electrochemical energy storage store_e is expressed as:

[0053] C store_e = 4 × Q store_e ;

[0054] The constraint conditions of the operating characteristics of the electrochemical energy storage are expressed as:

[0055]

[0056] Among them, P store_e represents the change of the charge-discharge power of the electrochemical energy storage over time, and S g(t) represents the value of the area of each block graph enclosed by g(t) and the time axis t, and g(t) represents the absolute value of the change of the charge-discharge power of the electrochemical energy storage over time.

[0057] As a preferred embodiment, according to the power generation output of the integrated energy system needs to be greater than or equal to the electrical load, the judgment method is expressed as:

[0058]

[0059] As a preferred embodiment, the constraint condition of the hydrogen storage tank scale is expressed as:

[0060]

[0061] Among them, represents the hydrogen storage tank scale, represents the change function of the electrical output power of the hydrogen fuel cell over the preset time t, h(t) represents the absolute value of the deviation between the hydrogen consumption of the hydrogen fuel cell and the hydrogen production of the electrolyzer, and S h(t) represents the value of the area of each block graph enclosed by h(t) and the time axis t.

[0062] On the other hand, the present invention also provides an electronic device, on which a computer program is stored, and when the computer program is executed by a processor, it implements the island off-grid hydrogen energy integrated energy system planning method as described in any embodiment of the present invention.

[0063] On the other hand, the present invention also provides a computer-readable storage medium for storing one or more programs, and when the one or more programs are executed by the one or more processors, the one or more processors are caused to implement the island off-grid hydrogen energy integrated energy system planning method as described in any embodiment of the present invention.

[0064] The present invention has the following beneficial effects:

[0065] By integrating various renewable energy sources such as wind power and photovoltaic power, and combining hydrogen fuel cells and electrochemical energy storage systems, the present invention realizes the complementarity between different energy forms. For example, when the power generation of wind power and photovoltaic power is insufficient, the power demand can be supplemented by hydrogen fuel cells and electrochemical energy storage systems; while when the power generation of renewable energy is surplus, the surplus power can be used for electrolyzing water to produce hydrogen and storing the hydrogen for subsequent use. This multi-energy complementary mechanism effectively improves the stability of energy supply and reduces the risk of energy shortage caused by weather changes or resource fluctuations. The present invention is particularly suitable for off-grid areas such as islands, enabling energy self-sufficiency and reducing the dependence on traditional fossil energy and external energy supply. This is of great significance for ensuring basic living and production electricity in island areas under adverse weather or limited transportation conditions. By making full use of renewable energy sources such as wind energy and solar energy and combining hydrogen energy technology, the present invention realizes the low-carbon or even zero-carbon operation of the energy system. Compared with traditional diesel generators or fossil fuel transportation, this system hardly generates greenhouse gas emissions during operation, significantly reducing environmental pollution. The present invention provides multiple operation modes and can be flexibly adjusted according to different working conditions. For example, during normal operation, the system can achieve the balance between power generation and power consumption; when the power generation is surplus, the surplus energy can be stored through the energy storage system; when the power generation is insufficient, the energy can be supplemented through the energy storage system and hydrogen fuel cells. This flexible operation mode improves the adaptability and reliability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] Figure 1 It is a flowchart of the method implementation of the present invention.

[0067] Figure 2 It is a connection diagram of the system of the present invention.

[0068] Figure 3 It is a normalized output characteristic curve diagram of the wind power generation equipment of the present invention.

[0069] Figure 4 It is a normalized output characteristic curve diagram of the photovoltaic power generation equipment of the present invention.

[0070] Figure 5 It is an electric load characteristic curve diagram of the present invention.

[0071] Figure 6 It is a heat load characteristic curve diagram of the present invention.

[0072] Figure 7 It is a typical power demand curve diagram of the present invention in January.

[0073] Figure 8 It is a typical power supply curve diagram of the present invention in January.

[0074] Figure 9 It is a typical power demand curve diagram of the present invention in August.

[0075] Figure 10 This is the typical power supply curve graph of the present invention in August. Specific embodiments

[0076] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0077] It should be understood that the step numbers used in the text are only for convenient description and do not limit the order of execution of the steps.

[0078] It should be understood that the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms.

[0079] The terms "comprising" and "including" indicate the presence of the described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their combinations.

[0080] The term "and / or" refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0081] Embodiment 1:

[0082] Refer to Figure 2 , an off-grid hydrogen energy integrated energy system for islands, including a power supply module, an electrochemical energy storage, a hydrogen storage tank, an electrolyzer, a hydrogen fuel cell, and a hot water module;

[0083] The output end of the power supply module is respectively connected to the input end of the hydrogen production module and the electrochemical energy storage through a power bus;

[0084] The input end of the hydrogen production module is connected to seawater, and the output end of the hydrogen production module is respectively connected to the hydrogen storage tank, the input end of the hydrogen fuel cell, and the input end of the hot water module;

[0085] The hydrogen fuel cell is connected to the hot water module;

[0086] The hot water module is used to heat the fresh water output by the hydrogen production module and cool the hot water generated by the hydrogen fuel cell.

[0087] The power supply module includes a wind power generation device and a photovoltaic power generation device;

[0088] The output ends of the wind power generation device and the photovoltaic power generation device are connected to the power bus.

[0089] The power input end of the electrolyzer is connected to the power bus, the fresh water input end of the electrolyzer is connected to fresh water, the hydrogen output end of the electrolyzer is respectively connected to the hydrogen storage tank, and is connected to the hydrogen input end of the hydrogen fuel cell through a first regulating valve.

[0090] The power output end of the hydrogen fuel cell is connected to the power bus.

[0091] The hot water module includes a heat exchanger, a circulation pump and an air cooler;

[0092] The first input end of the heat exchanger is connected to fresh water, and the first output end of the heat exchanger is connected to the hot water user through a second regulating valve;

[0093] The second input end of the heat exchanger is connected to the hot water output end of the hydrogen fuel cell, and the second output end of the heat exchanger is connected to the cold water input end of the hydrogen fuel cell through a circulation pump and an air cooler.

[0094] The power bus is connected to the electricity user.

[0095] See Figure 1 , the present invention provides a method for planning an island off-grid hydrogen energy integrated energy system, including the following steps:

[0096] S1. Obtain the normalized output characteristic curve of the wind power generation device and the normalized output characteristic curve of the photovoltaic power generation device of the integrated energy system at a preset time, as well as the electric load characteristic curve and the heat load characteristic curve of the integrated energy system at a preset time;

[0097] S2. Determine the installed capacity of the wind power generation device and the photovoltaic power generation device of the integrated energy system according to the electric load characteristic curve;

[0098] S3. Determine the scale of the hydrogen fuel cell according to the heat load characteristic curve;

[0099] S4. Determine the capacity of the electrolyzer according to the normalized output characteristic curve of the wind power generation device, the normalized output characteristic curve of the photovoltaic power generation device, the installed capacity of the wind power generation device and the photovoltaic power generation device, and the electric load characteristic curve;

[0100] S5. Determine the installed capacity and operating characteristics of the electrochemical energy storage of the integrated energy system;

[0101] S6. Judge whether the installed capacity of the wind power generation device and the photovoltaic power generation device meets the requirement that the power generation output is greater than or equal to the power consumption load. If it meets, execute step S7; if not, execute step S2;

[0102] S7. Determine the scale of the hydrogen storage tank in the integrated energy system.

[0103] The normalized output characteristic curves of the wind power generation equipment and the photovoltaic power generation equipment can be obtained from the investigation of wind resources and light resources;

[0104] The annual electricity load characteristic curve and the annual heat load characteristic curve can be obtained through the investigation of the electricity user and heat user demands. The electricity load characteristic curve is the superposition of the electricity load curves of all electricity users, and the heat load characteristic curve is the superposition of the heat load curves of all heat users;

[0105] See Figures 3 - 10 , as a preferred implementation mode, the normalized output characteristic curve of the wind power generation equipment is expressed as:

[0106] ε wind = f wind (t);

[0107] Among them, ε wind represents the normalized output of wind power, and f wind (t) represents the variation function of the normalized output of wind power with the preset time t;

[0108] The normalized output characteristic curve of the photovoltaic power generation equipment is expressed as:

[0109] ε pv = f pv (t);

[0110] Among them, ε pv represents the normalized output of photovoltaic power, and f pv (t) represents the variation function of the normalized output of photovoltaic power with the preset time t;

[0111] The electricity load characteristic curve is expressed as:

[0112] P electricity = f electricity (t);

[0113] Among them, P electricity represents the electricity load, and f electricity (t) represents the variation function of the electricity load with the preset time t;

[0114] The heat load characteristic curve is expressed as:

[0115] P heat = f heat (t);

[0116] Among them, P heat represents the heat load, and f heat (t) represents the variation function of the heat load with the preset time t.

[0117] As a preferred embodiment, the constraint conditions for the installed capacity of wind power generation equipment and photovoltaic power generation equipment are expressed as:

[0118]

[0119] Among them, Q wind represents the installed capacity of wind power generation equipment, Q pv represents the installed capacity of photovoltaic power generation equipment, max() represents the maximum value function, and h represents the time variable (i.e., when h takes the value of 1, it represents 1 hour).

[0120] As a preferred embodiment, the constraint conditions for the scale of hydrogen fuel cells are expressed as:

[0121]

[0122] Among them, represents the thermal efficiency of the hydrogen fuel cell (preset according to the operator's experience, 30% in this embodiment), represents the electrical efficiency of the hydrogen fuel cell (preset according to the operator's experience, 50% - 60% in this embodiment), represents the total efficiency of the hydrogen fuel cell;

[0123] The output power of the hydrogen fuel cell is expressed as:

[0124]

[0125] Among them, represents the function of the output power of the hydrogen fuel cell changing with the preset time t;

[0126] The scale of the hydrogen fuel cell is expressed as:

[0127]

[0128] Among them, represents the installed capacity of the hydrogen fuel cell expressed in terms of power consumption, represents the electrical output power of the hydrogen fuel cell, represents the function of the electrical output power of the hydrogen fuel cell changing with the preset time t.

[0129] As a preferred embodiment, the constraint conditions for the operating characteristics of the electrolyzer are expressed as:

[0130]

[0131] Among them, P electrolysor represents the load characteristic of the electrolyzer, and η electrolysor represents the electrolyzer efficiency;

[0132] Load characteristic P of the electrolyzer electrolysor It is expressed as:

[0133] P electrolysor = f electrolysor (t);

[0134] Among them, f electrolysor (t) represents the variation function of the load characteristic of the electrolyzer with the preset time t;

[0135] The constraint condition of the capacity of the electrolyzer is expressed as:

[0136] Q electrolysor ≥ max(P electrolysor );

[0137] Among them, Q electrolysor represents the capacity of the electrolyzer.

[0138] As a preferred implementation method, the installed capacity of the electrochemical energy storage is expressed as:

[0139]

[0140] Among them, Q store_e represents the installed capacity of the electrochemical energy storage;

[0141] The electrochemical energy storage is a short-term energy storage method. The energy storage capacity is determined according to 4 hours of energy storage. The energy storage capacity C of the electrochemical energy storage store_e is expressed as:

[0142] C store_e = 4 × Q store_e ;

[0143] The constraint condition of the operating characteristics of the electrochemical energy storage is expressed as:

[0144]

[0145] Among them, P store_e represents the change of the charge and discharge power of the electrochemical energy storage with time (charging is positive and discharging is negative), S g(t) represents the value of the area of each block of the graph enclosed by g(t) and the time axis t. The discrete curve of g(t) will enclose several blocks of graphs with the abscissa. g(t) represents the absolute value of the change of the charge and discharge power of the electrochemical energy storage with time; t is the horizontal axis, and the charge and discharge power of the electrochemical energy storage is the vertical axis. max[S g(t) represents the maximum value of the area values of each block of the graph.

[0146] As a preferred implementation method, according to the power generation output of the integrated energy system needs to be greater than or equal to the electrical load, the judgment method is expressed as:

[0147]

[0148] As a preferred embodiment, the constraint condition of the hydrogen storage tank scale is expressed as:

[0149]

[0150] Wherein, represents the hydrogen storage tank scale, represents the function of the electrical output power of the hydrogen fuel cell varying with the preset time t, h(t) represents the absolute value of the deviation between the hydrogen consumption of the hydrogen fuel cell and the hydrogen production of the electrolyzer, h(t) is a discrete curve, and will enclose several graphs with the abscissa. S h(t) represents the area value of each graph enclosed by h(t) and the time axis t, and max[S h(t) represents the maximum area value among the area values of each graph; the deviation between the hydrogen consumption of the hydrogen fuel cell and the hydrogen production of the electrolyzer is the ordinate.

[0151] Figures 3 - 6 In, the abscissa is time, the unit is hour, the ordinate has no unit and represents a normalized quantity, and the maximum value of the ordinate is 1.

[0152] Figures 7 - 10 In, the abscissa is time, the unit is hour, and the value represents a certain period of time in 8760 hours of a year.

[0153] Embodiment 2:

[0154] This embodiment provides an electronic device, on which a computer program is stored, and when the computer program is executed by a processor, it implements the island off-grid hydrogen energy integrated energy system planning method as described in any embodiment of the present invention.

[0155] Embodiment 3:

[0156] This embodiment provides a computer-readable storage medium for storing one or more programs, and when the one or more programs are executed by the one or more processors, the one or more processors are enabled to implement the island off-grid hydrogen energy integrated energy system planning method as described in any embodiment of the present invention.

[0157] Embodiment 4:

[0158] This embodiment provides an operation method for an island off-grid hydrogen energy integrated energy system:

[0159] D1. Under normal operating conditions: the electricity demand of electricity users and electrolyzers is balanced with the power generation of wind power, photovoltaic power, and hydrogen fuel cells.

[0160] D2. When there is surplus power generation from wind power and photovoltaic power: First, the surplus power is stored through electrochemical energy storage. When the capacity of the electrochemical energy storage reaches its maximum, the load of the electrolyzer is increased, and the excess hydrogen produced by the electrolyzer is stored in a hydrogen storage tank, so that the system achieves a balance between power generation and power consumption.

[0161] D3. When the power generation from wind power and photovoltaic power is insufficient: First, the electrochemical energy storage releases power. When the power of the electrochemical energy storage is completely released, the power consumption demand of the system is reduced by reducing the output of the electrolyzer, and the shortage of hydrogen required by the hydrogen fuel cell is supplemented by releasing hydrogen from the hydrogen storage tank, so that the system achieves a balance between power generation and power consumption.

[0162] In the embodiments of the present application, "at least one" means one or more, and "a plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent the situation where A exists alone, A and B exist simultaneously, or B exists alone. Where A and B can be singular or plural. The character " / " generally represents an "or" relationship between the associated objects before and after. "At least one of the following" and its similar expressions refer to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, and c can represent: a, b, c, a and b, a and c, b and c, or a and b and c, where a, b, and c can be single or multiple.

[0163] Those of ordinary skill in the art can realize that the units and algorithm steps described in the embodiments disclosed herein can be implemented by a combination of electronic hardware, computer software, and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present application.

[0164] Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein.

[0165] In several embodiments provided by the present application, if any 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 this understanding, the technical solution of the present application, 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 application. The aforementioned storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories (ROM), random access memories (RAM), magnetic disks, or optical discs.

[0166] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A method for planning an off-grid hydrogen energy integrated energy system for an island, characterized in that: The following steps are involved: S1. Obtaining a normalized output characteristic curve of a wind power generation device and a normalized output characteristic curve of a photovoltaic power generation device at a preset time of the integrated energy system, as well as an electric load characteristic curve and a thermal load characteristic curve at a preset time of the integrated energy system; S2. Determine the installed capacity of wind power generation equipment and photovoltaic power generation equipment of the integrated energy system according to the electric load characteristic curve; S3. Determine the scale of the hydrogen fuel cell according to the heat load characteristic curve; S4. Determine the capacity of the electrolytic cell according to the normalized output characteristic curve of the wind power generation equipment, the normalized output characteristic curve of the photovoltaic power generation equipment, the installed capacity of the wind power generation equipment and the photovoltaic power generation equipment, and the electric load characteristic curve; S5. Determine the installed capacity and operating characteristics of electrochemical energy storage in the integrated energy system; S6, judging whether the installed capacity of the wind power generation equipment and the photovoltaic power generation equipment meets the requirement that the power generation output is greater than or equal to the power load, if so, executing step S7, if not, executing step S2; S7. Determine the scale of hydrogen storage tanks for the integrated energy system.

2. The method for planning an off-grid hydrogen energy integrated energy system for an island according to claim 1, characterized in that: The normalized output characteristic curve of the wind power generation equipment is expressed as: e Wind =f wind (t); Among them, ε wind represents the normalized output of wind power, f wind (t) represents the function of the normalized wind power output changing with the preset time t; The normalized output characteristic curve of photovoltaic power generation equipment is expressed as: e pv =f pv (t); Among them, ε pv represents the normalized output of photovoltaic power, f pv (t) represents the function of the normalized photovoltaic output changing with the preset time t; The electric load characteristic curve is expressed as: P electricity =f electricity (t); Among them, P electricity represents the electrical load, f electricity (t) represents the function of the change of electric load with the preset time t; The heat load characteristic curve is expressed as: P heat =f heat (t); Among them, P heat represents the heat load, f heat (t) represents the function of heat load changing with the preset time t.

3. The method for planning an off-grid hydrogen energy integrated energy system for an island according to claim 2, characterized in that: The constraints on the installed capacity of wind power generation equipment and photovoltaic power generation equipment are expressed as follows: Among them, Q wind represents the installed capacity of wind power generation equipment, Q pv represents the installed capacity of photovoltaic power generation equipment, max() represents the maximum value function, and h represents the time variable.

4. The method for planning an off-grid hydrogen energy integrated energy system for an island according to claim 2, characterized in that: The scale constraints of hydrogen fuel cells are expressed as: in, represents the thermal efficiency of hydrogen fuel cells, represents the electrical efficiency of hydrogen fuel cells, Represents the overall efficiency of hydrogen fuel cells; Hydrogen fuel cell output power It is expressed as: in, Represents the function of the output power of the hydrogen fuel cell changing with the preset time t; The scale of a hydrogen fuel cell is expressed as: in, Indicates the installed capacity of hydrogen fuel cells expressed in electrical power, represents the electrical output power of the hydrogen fuel cell, It represents the function of the electrical output power of the hydrogen fuel cell changing with the preset time t.

5. The method for planning an off-grid hydrogen energy integrated energy system for an island according to claim 3 or 4, characterized in that: The constraints on the operating characteristics of the electrolyzer are expressed as: Among them, P electrolysor Represents the load characteristics of the electrolytic cell, η electrolysor represents the electrolyzer efficiency; Load characteristics of electrolytic cell P electrolysor It is expressed as: P electrolysor =f electrolysor (t); Among them, f electrolysor (t) represents the load characteristic of the electrolytic cell as a function of the preset time t; The capacity constraint of the electrolytic cell is expressed as: Q electrolysor ≥max(P electrolysor ); Among them, Q electrolysor Indicates the capacity of the electrolytic cell.

6. The method for planning an off-grid hydrogen energy integrated energy system for an island according to claim 5, characterized in that: The installed capacity of electrochemical energy storage is expressed as: Among them, Q store_e Indicates the installed capacity of electrochemical energy storage; Energy storage capacity of electrochemical energy storage C store_e It is expressed as: C store_e =4×Q store_e ; The constraints on the operating characteristics of electrochemical energy storage are expressed as: Among them, P store_e Represents the change of electrochemical energy storage charging and discharging power over time, S g(t) It represents the area of ​​each block of graphics enclosed by g(t) and the time coordinate axis t. g(t) represents the absolute value of the change of electrochemical energy storage charging and discharging power over time.

7. The method for planning an off-grid hydrogen energy integrated energy system for an island according to claim 6, characterized in that: According to the requirement that the power generation output of the integrated energy system is greater than or equal to the power load, the judgment method is expressed as follows:

8. The method for planning an off-grid hydrogen energy integrated energy system for an island according to claim 7, characterized in that: The constraints on the size of the hydrogen storage tank are expressed as: in, Indicates the size of the hydrogen storage tank, represents the function of the electric output power of the hydrogen fuel cell changing with the preset time t, h(t) represents the absolute value of the deviation between the hydrogen consumption of the hydrogen fuel cell and the hydrogen production of the electrolyzer, S h(t) Represents the value of the area of ​​each block of the graph enclosed by h(t) and the time coordinate axis t.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, it implements the island off-grid hydrogen energy integrated energy system planning method as described in any one of claims 1 to 8.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, it implements the island off-grid hydrogen energy integrated energy system planning method as described in any one of claims 1 to 8.

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