A two-stage planning method and system for a salt cavern integrated energy system

Abstract

The application discloses a kind of salt cave comprehensive energy system two-stage programming method and system, it is related to comprehensive energy system planning technical field, including: the model of comprehensive energy system comprising different hydrogen storage salt cave unit type is constructed, whereby to minimize the total cost of comprehensive energy system, carbon dioxide emissions and salt mine resource occupation as objective function, introduce the cushion gas constraint and exhaust constraint of hydrogen storage salt cave unit, construct two-stage programming model;Month is carried out month planning simulation with time interval, determine the ratio of hydrogen storage amount and maximum expansion capacity of each hydrogen storage salt cave unit at the end of each time period;The ratio is used as new input, and under the hydrogen storage amount constraint based on new input construction, carry out annual planning simulation with time interval for hour, determine the system planning strategy including hydrogen storage salt cave unit combination operation.Improve the utilization of salt cave built under complex geological conditions, give full play to the advantage of hydrogen storage link of salt cave, realize low-carbon economic operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of integrated energy system planning, in particular to a salt cavern integrated energy system two-stage planning method and system. BACKGROUND

[0002] The statements in this section merely provide background information related to the present application and do not necessarily constitute prior art.

[0003] The stable cavity formed by dissolving the underground salt layer is used to store high-pressure hydrogen, which has the advantages of large capacity, good sealing, high pressure resistance and high recycling rate, and has been preliminarily applied.

[0004] The current salt cavern construction method is single, such as only based on single-well single-cavity old-cavity salt cavern or old-cavity salt cavern connected by wells, etc. The abandoned old cavity is modified, or only based on conventional borehole cavity salt cavern, large borehole cavity salt cavern or double-well single-cavity salt cavern, etc. The salt cavern is constructed by artificial new technology. However, this scheme cannot give the optimal construction scheme according to the characteristics of the salt mine conditions in different regions, and in some complex geological conditions, the single salt cavern construction method cannot meet the construction demand, and the local salt mine resources cannot be effectively utilized. Moreover, the existing scheme also has problems such as long time-consuming in the cavity dissolving process, inaccurate shape control, low utilization rate of salt layer, etc., which cannot effectively play the advantages of large scale and economy of salt cavern hydrogen storage.

[0005] In addition, when the integrated energy system containing the hydrogen storage salt cavern unit is running, if the salt cavern is forced to exhaust under insufficient pressure, the wall surface will bear abnormal stress, thereby easily causing problems such as collapse, cracks or gas leakage. At the same time, the salt cavern unit is input or releases hydrogen through the well, and the maximum exhaust capacity per unit time is limited by the wellhead area, gas pressure and other conditions. If this limitation is ignored, it is easy to cause the running result to exceed the physical limit of the hydrogen storage salt cavern unit, causing equipment overload or energy supply interruption and other problems. SUMMARY

[0006] In order to solve the above problems, the present application provides a salt cavern integrated energy system two-stage planning method and system, which determines the optimal system planning strategy including the combined operation of the hydrogen storage salt cavern unit by considering a plurality of hydrogen storage salt cavern units based on different salt cavern construction technologies, improves the utilization of salt cavern construction under complex geological conditions, fully utilizes the advantages of salt cavern hydrogen storage link, and realizes low-carbon economic operation.

[0007] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0008] In a first aspect, the present application provides a salt cavern integrated energy system two-stage planning method, comprising:

[0009] A comprehensive energy system model containing different types of hydrogen storage cavern units is constructed, a two-stage programming model is constructed with the objective function of minimizing the total cost of the comprehensive energy system, carbon dioxide emissions and salt mine resource occupation, and the hydrogen storage constraints, cushion gas constraints and exhaust gas constraints of the hydrogen storage cavern units are introduced as constraint conditions;

[0010] Based on the two-stage programming model, the operation parameters of the comprehensive energy system model and the salt mine resources are input, the monthly planning simulation is carried out at a monthly time interval, and the ratio of the hydrogen storage capacity of each type of hydrogen storage cavern unit to the maximum expansion capacity of the salt cavern at the end of each time period is determined;

[0011] The ratio is taken as a new input, and based on the hydrogen storage constraints constructed based on the new input, the annual planning simulation is carried out at an hourly time interval, and the system planning strategy including the combined operation of the hydrogen storage cavern units is determined.

[0012] As an optional implementation, the mathematical model of the hydrogen storage cavern unit and the hydrogen storage constraint are respectively:

[0013] ;

[0014] ;

[0015] Among them, is the hydrogen storage capacity of the i-th hydrogen storage cavern unit at time t; t is the hydrogen storage capacity of the i-th hydrogen storage cavern unit at time t; i and represent the hydrogen charging power and hydrogen discharging power of the i-th hydrogen storage cavern unit at time t; , t- and represent the hydrogen charging power and hydrogen discharging power of the i-th hydrogen storage cavern unit at time t; i , and represent the hydrogen charging power and hydrogen discharging power of the i-th hydrogen storage cavern unit at time t; , t and represent the hydrogen charging power and hydrogen discharging power of the i-th hydrogen storage cavern unit at time t; i , and represent the hydrogen charging power and hydrogen discharging power of the i-th hydrogen storage cavern unit at time t; , and represent the hydrogen charging power and hydrogen discharging power of the i-th hydrogen storage cavern unit at time t; t , i and represent the hydrogen charging power and hydrogen discharging power of the i-th hydrogen storage cavern unit at time t; , and represent the hydrogen charging power and hydrogen discharging power of the i-th hydrogen storage cavern unit at time t; i , and represent the hydrogen charging power and hydrogen discharging power of the i-th hydrogen storage cavern unit at time t; i ,

[0016] As an optional implementation, the cushion gas constraint of the hydrogen storage cavern unit is:

[0017] ;

[0018] ;

[0019] in, Indicates the first i The required percentage of cushion gas for safe operation of a hydrogen storage salt cavern unit; It is a 0-1 variable; when the hydrogen storage salt cavern unit meets the cushion gas requirements... A value of 1 indicates that the hydrogen storage salt cavern unit can safely release hydrogen at this time. When the hydrogen storage salt cavern unit does not meet the cushion gas requirements... A value of 0 indicates that the hydrogen storage salt cavern unit cannot release hydrogen at this time; express t Time of the first i Hydrogen release power of a hydrogen storage salt cavern unit; yes t Time of the first i Hydrogen storage capacity of a hydrogen storage salt cavern unit; and They are the first i The maximum hydrogen storage capacity and maximum charge / discharge power of the hydrogen storage salt cavern unit.

[0020] As an alternative implementation method, the exhaust constraints for the hydrogen storage salt cavern unit are:

[0021] ;

[0022] ;

[0023] in, It is the maximum gas volume that can pass through the i-th type of hydrogen storage salt cavern unit per unit time under the wellhead restriction; and They represent t Time of the first i Hydrogen charging power and hydrogen discharging power of a hydrogen storage salt cavern unit; and These are the gas pressure and temperature inside the salt cavern of the i-th type of hydrogen storage salt cavern unit; It is the specific heat ratio of hydrogen; It is an exclusion coefficient; It is the specific gravity of the gas air; This is a unit conversion factor; Let be the wellhead area of ​​the i-th type of hydrogen storage salt cavern unit.

[0024] As an alternative implementation method, the salt mine resource occupancy for:

[0025] ;

[0026] in, and These are the conversion coefficient of the economic value of salt mine resources per unit of newly constructed salt caverns and the unit conversion coefficient, respectively. the number of types of hydrogen storage cavern units; the rated installed capacity of the i-th hydrogen storage cavern unit.

[0027] As an alternative embodiment, the hydrogen storage amount constraint is:

[0028]

[0029] wherein, is the ratio of the hydrogen storage amount to the maximum expansion capacity of the salt cavern; t1 refers to the last hour of each month in a year; is the hydrogen storage amount of the i-th hydrogen storage cavern unit at t1; i is the hydrogen storage amount of the i-th hydrogen storage cavern unit at t1; is the maximum hydrogen storage amount of the i-th hydrogen storage cavern unit. i In a second aspect, the present application provides a two-stage planning system for a salt cavern integrated energy system, comprising:

[0030] a model construction module configured to construct an integrated energy system model containing different types of hydrogen storage cavern units, thereby taking the minimization of the total cost of the integrated energy system, carbon dioxide emissions and salt mine resource occupation as the objective function, introducing the hydrogen storage constraint, the cushion gas constraint and the exhaust gas constraint of the hydrogen storage cavern unit as the constraint condition, and constructing a two-stage planning model;

[0031] a first-stage planning module configured to perform monthly planning simulation based on the two-stage planning model, taking the integrated energy system model operation parameters and the salt mine resources as the input, and taking the month as the time interval, to determine the ratio of the hydrogen storage amount to the maximum expansion capacity of each type of hydrogen storage cavern unit at the end of each time period;

[0032] a second-stage planning module configured to take the ratio as a new input, and perform annual planning simulation based on the hydrogen storage amount constraint constructed based on the new input, taking the hour as the time interval, to determine the system planning strategy including the combined operation of the hydrogen storage cavern units.

[0033] In a third aspect, the present application provides an electronic device, comprising a memory and a processor, and computer instructions stored in the memory and running on the processor, when the computer instructions are run by the processor, the method of the first aspect is completed.

[0034] In a fourth aspect, the present application provides a computer readable storage medium for storing computer instructions, when the computer instructions are executed by the processor, the method of the first aspect is completed.

[0035] In a fifth aspect, the present application provides a computer program product comprising a computer program, when the computer program is executed by the processor, the method of the first aspect is completed.

[0036] ​​

[0037] Compared with the prior art, the present application has the following advantages:

[0038] The present application proposes a two-stage planning method and system for a salt cavern comprehensive energy system, from the perspective of transforming existing old caverns and artificially building new salt caverns, considering five salt cavern construction technologies with different applicable geographical conditions and salt cavern unit cost and operation characteristics, including single-well single-cavern old cavern salt, double-well connected old cavern salt, conventional borehole cavern salt, large borehole cavern salt and double-well single-cavern built salt cavern, building a comprehensive energy system model containing different types of hydrogen storage salt cavern units, each hydrogen storage salt cavern unit corresponding to a salt cavern construction technology; then, taking the minimization of the total cost of the comprehensive energy system, carbon dioxide emissions and salt mine resource occupation as the objective function, and incorporating the cushion gas constraint according to the operation characteristics of the hydrogen storage salt cavern unit, and combining the fluid mechanics formula to derive and incorporate the exhaust constraint, a two-stage planning model is constructed, the accuracy and authenticity of the planning results are improved by setting different time scales, the problem of low utilization of salt mine resources caused by the scarcity of high-quality reservoir sites in traditional salt cavern construction technology is solved, the utilization of salt cavern construction under complex geological conditions is improved, the advantages of the hydrogen storage link of the salt cavern are fully utilized, and low-carbon economic operation is realized.

[0039] The method of the present application is aimed at the characteristics of hydrogen storage salt cavern units in cross-season and long-period energy storage, a two-stage planning model is proposed, the monthly and hourly time scales are set in the first and second stages respectively, and part of the operation results of the first stage are used as new input parameters of the second stage for progressive simulation, in the short time scale, the hydrogen storage salt cavern unit can be modeled in detail, and compared with the conventional above-ground hydrogen storage tank model, in addition to considering the conventional hydrogen storage equipment operation constraint, the cushion gas constraint and the maximum exhaust constraint per unit time are also incorporated; in the long time scale, the hydrogen storage salt cavern has the characteristics of seasonality and long periodicity, therefore, by setting different time scales for planning simulation, the authenticity and accuracy of the results are improved, the optimal salt cavern construction technology combination scheme can be given according to the characteristics of the salt mine conditions in different regions, and the salt mine resources can be effectively utilized.

[0040] The advantages of the additional aspects of the present application will be partially given in the following description, partially will become apparent from the following description, or will be known by the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description, obviously, the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of the provided drawings.

[0042] Figure 1A flow chart of a two-stage planning method of a salt cavern comprehensive energy system is provided for the embodiment 1 of the present application.

[0043] Figure 2 A schematic diagram of a comprehensive energy system model framework is provided for the embodiment 1 of the present application. DETAILED DESCRIPTION

[0044] The present application is further described below in conjunction with the accompanying drawings and embodiments.

[0045] It should be noted that the following detailed description is exemplary in nature and is intended to provide further description of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0046] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0047] The embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0048] Embodiment 1

[0049] Currently, salt caverns are mainly constructed through two ways, i.e., through transformation of abandoned old caverns to obtain salt caverns and through artificial new construction to obtain salt caverns.

[0050] Through secondary transformation of abandoned old caverns, the time for obtaining salt caverns can be reduced, and the construction cost of salt caverns can also be reduced to a certain extent. The old caverns in common salt cavern transformation cases are mostly single-well single-cavern types, and such old cavern transformation has the advantages of mature technology, short transformation period and strong independence during operation. However, the old cavern transformation technology has high requirements, such as: in terms of geological conditions, a good cap rock, less development of adjacent faults and fractures, small scale, etc. are required; in terms of cavern conditions, a certain cavern volume is required to meet the economic requirements, the adjacent caverns meet the safety pillar requirements, and there is no stringing between the caverns, a certain thickness of the roof is required; in terms of ground conditions, the wellhead and surrounding buildings meet the safety distance requirements.

[0051] And the single-well single-cavity type of old cavity is less, most of the salt mines use the single-well single-cavity type in the early stage, and then generally convert to the use of the pair of wells. Therefore, for the type of abandoned old cavity, the method of transforming the pair of wells can be used to upgrade it to a salt cave. Compared with the single-well single-cavity old salt cave, the salt cave has the advantages of abundant resources and high transformation efficiency.

[0052] Therefore, the salt cave transformed from the abandoned old cavity considered in the embodiment includes the single-well single-cavity old salt cave and the pair of wells connected old salt cave.

[0053] In addition to transforming the abandoned old cavity, in the area where the old cavity resource is less, the method of artificially building a reservoir can be used to obtain a salt cave to use the salt cave hydrogen storage technology. In the aspect of artificial new salt cave technology, the commonly used technology at present is the conventional borehole cavity building technology. The borehole diameter of the conventional borehole reservoir building technology is generally 508mm+339.7mm+244.5mm, the borehole diameter is small, so the water injection displacement during the cavity building stage is small, the cavity building speed is slow, and the cycle is long, which cannot meet the construction needs of the underground gas storage reservoir.

[0054] In addition, using the current conventional reservoir building method in the deeper salt layer will face the technical problems of high injection and production completion well risk caused by the increase of depth and complex geological conditions. Scholars have proved that the large borehole reservoir building scheme and the double-well reservoir building scheme have great advantages in improving the above technical problems. Among them, the large borehole reservoir building technology generally adopts the well structure of 762mm+508mm+339.7mm, the borehole diameter is large, which can meet the needs of large displacement and fast cavity building and large displacement injection and production of gas, and the double-well single-cavity reservoir building technology usually corresponds to one cavity with two conventional boreholes. When building a cavity, one injection and one production can be realized, which can also meet the demand of fast cavity building.

[0055] Therefore, the salt cave obtained by the artificial new construction technology considered in the embodiment includes the conventional borehole cavity building salt cave, the large borehole cavity building salt cave and the double-well single-cavity reservoir building salt cave.

[0056] Based on the above analysis, the embodiment provides a two-stage planning method for a salt cave comprehensive energy system, as shown in Figure 1 The method comprises the following steps:

[0057] A comprehensive energy system model containing different types of hydrogen storage salt cave units is constructed, so as to minimize the total cost of the comprehensive energy system, the carbon dioxide emission and the salt mine resource occupation as the objective function, introduce the hydrogen storage constraint, the cushion gas constraint and the exhaust gas constraint of the hydrogen storage salt cave unit as the constraint condition, and construct a two-stage planning model;

[0058] Based on the two-stage planning model, the running parameters of the comprehensive energy system model and the salt mine resources are input, the monthly planning simulation is carried out at a monthly time interval, and the ratio of the hydrogen storage capacity of each type of hydrogen storage salt cave unit to the maximum expansion capacity of the salt cave at the end of each time period is determined.

[0059] The ratio is taken as a new input, and the system planning strategy including the operation of the hydrogen storage cavern unit is determined by simulating the whole year at an hourly interval under the hydrogen storage capacity constraint based on the new input.

[0060] As shown in Figure 2 The comprehensive energy system model containing different types of hydrogen storage cavern units is shown, which specifically includes: renewable energy units, conventional thermal power units, electric energy storage units, combined heat and power units, electrolysis units, fuel cell units, hydrogen storage cavern units and heat storage tank units.

[0061] Among them, renewable energy units, conventional thermal power units, fuel cell units, electric energy storage units and combined heat and power units provide electric load, and the excess power of each type of power supply unit is stored by the electric energy storage unit; renewable energy units provide hydrogen load and heat load through electrolysis units, fuel cell units, combined heat and power units and heat storage tank units provide heat load, and hydrogen storage cavern units store hydrogen energy, which can meet the hydrogen load demand across time scales; hydrogen energy will also be input to fuel cell units and hydrogen storage cavern units for storage, and heat energy will also be input to heat storage tank units for storage.

[0062] Among them, each type of hydrogen storage cavern unit corresponds to a type of salt cavern construction technology, specifically 5 types of salt cavern construction technology: single-well single-cavity old-cavity salt cavern, double-well connected old-cavity salt cavern, conventional borehole cavity salt cavern, large borehole cavity salt cavern and double-well single-cavity salt cavern.

[0063] In this embodiment, the comprehensive energy system model containing different types of hydrogen storage cavern units is based on the conventional power system, and also considers electrolysis units (EL) and fuel cell units (FC), and is equipped with hydrogen storage cavern units to perfect the hydrogen energy link and the electric-hydrogen coupling part.

[0064] Specifically includes the following contents.

[0065] 1. Electrolysis units can produce hydrogen by electrolyzing water, convert the surplus green power generated by renewable energy units in the power system into hydrogen energy, and promote the consumption of renewable energy in the power system. The hydrogen energy produced through this link can be directly used for hydrogen load supply, or stored in hydrogen storage equipment.

[0066] According to different classification of electrolyte, common electrolysis units are mainly divided into alkaline electrolysis unit, solid oxide electrolysis unit and proton exchange membrane electrolysis unit, different types of electrolysis units have different costs and operating parameters.

[0067] The mathematical formula representing the energy conversion of the electrolysis unit and the related constraints are as follows:

[0068] (1)

[0069] (2);

[0070] in, , and They represent t Time of the first i The power consumption of the electrolytic cell unit, the rated power connected to the grid, and the power output of hydrogen; and They represent the first i The maximum installed capacity of the electrolyzer unit and the conversion efficiency from electrical energy to hydrogen energy; It has a low calorific value, taken as 33.3 kWh / kg.

[0071] Furthermore, it is essential to ensure that the electricity supplied to the electrolyzer is green electricity, meaning that the relevant electricity is generated from renewable energy units. The relevant constraints are expressed as follows:

[0072] (3);

[0073] in, and They are t The actual transmission power of wind turbines and photovoltaic units at any given time; This refers to the number of types of electrolytic cell units.

[0074] The operation of electrolytic cell units should also meet flexibility constraints, introducing continuous variables. and They represent t Time of the first i The grid-connected and off-grid capacities of various electrolytic cell units are determined, and the following constraints are met:

[0075] (4);

[0076] (5);

[0077] in, express t- 1st moment i The rated power of the electrolytic cell unit connected to the grid.

[0078] Flexibility constraints include output constraints, ramping constraints, and minimum start-stop time constraints.

[0079] The output constraint is as follows:

[0080] (6);

[0081] In the formula, and The firsti Minimum and maximum output coefficients of the electrolytic cell unit under its rated capacity.

[0082] The climbing constraint is:

[0083] (7);

[0084] (8);

[0085] In the formula, and They represent the first i The upward and downward slopes per unit capacity of the electrolytic cell-like unit; and They represent the first i The start-up ramp-up limit and shutdown ramp-up limit of the electrolytic cell-like unit can be set to... ; express t+ 1st moment i Off-grid capacity of electrolytic cell units; express t- 1st moment i The power consumption of a type of electrolytic cell unit.

[0086] The minimum start-stop time constraint is:

[0087] (9);

[0088] (10);

[0089] In the formula, and Representing the first i Minimum start-up and minimum shutdown times for electrolytic cell-like units; express t+ 1st moment i Grid-connected capacity of various electrolytic cell units; express Time of the first i The grid-connected capacity of the electrolytic cell unit; T is the total time.

[0090] 2. Fuel cell units can convert excess hydrogen energy in a hydrogen energy system into electrical energy to supply electrical loads, thereby improving energy utilization and providing flexibility to the power system.

[0091] The mathematical formula characterizing the energy conversion of a fuel cell unit is as follows:

[0092] (11);

[0093] (12);

[0094] in, , and They represent t Time of the first i The power of the fuel cell unit in generating electricity, its rated grid-connected power, and its power consumption of hydrogen. and They represent the first i The maximum installed capacity of the fuel cell unit and the conversion efficiency from hydrogen energy to electricity.

[0095] The flexibility constraints of fuel cell units are as follows:

[0096] (13);

[0097] (14);

[0098] (15);

[0099] (16);

[0100] (17);

[0101] (18);

[0102] (19);

[0103] In the formula, and They represent t Time of the first i The grid-connected and off-grid capacities of various fuel cell units; and The first i Minimum and maximum output coefficients of fuel cell generator units per unit rated capacity; and They represent the first i Upslope and downslope of unit capacity for fuel cell-like units; and These represent the start-up ramp-up limit and shutdown ramp-up limit for the i-th type of fuel cell unit, respectively, and can be set to... ; and These represent the minimum start-up time and minimum shutdown time of the i-th type of fuel cell unit, respectively. express t- 1st moment i The rated power of a fuel cell unit connected to the grid; They represent t+ 1st moment i Off-grid capacity of fuel cell units; express t- 1st moment i The power of electrical energy generated by a fuel cell unit; express t+ 1st moment i Grid-connected capacity of fuel cell units; express Time of the first i The grid-connected capacity of various fuel cell units.

[0104] 3. Hydrogen storage salt cavern units store excess hydrogen in the hydrogen energy system and release hydrogen when needed, achieving peak shaving and valley filling across time.

[0105] Traditional hydrogen storage salt cavern units involve integer variables, namely:

[0106] (20);

[0107] (twenty one);

[0108] in, yes t Time of the first i Hydrogen storage capacity of a hydrogen storage salt cavern unit; yes t- 1st moment i Hydrogen storage capacity of a hydrogen storage salt cavern unit; and Represent t Time of the first i Hydrogen charging power and hydrogen discharging power of a hydrogen storage salt cavern unit; , and They represent t Time of the first i Hydrogen charging conversion efficiency, hydrogen degassing conversion efficiency, and self-loss efficiency of a hydrogen storage salt cavern unit; and They are the first i The maximum hydrogen storage capacity and maximum charging / discharging power of the hydrogen storage salt cavern unit; It is a 0-1 variable. A value of 1 indicates that the hydrogen storage salt cavern unit is in a hydrogen charging state. A value of 0 indicates that the hydrogen storage salt cavern unit is in a hydrogen release state.

[0109] This embodiment incorporates the operating cost of the hydrogen storage salt cavern unit into the objective function, which enables the transformation of the hydrogen storage salt cavern unit model from a mixed-integer linear programming model to a linear programming model, thereby reducing the complexity of the mathematical model and improving the model solution speed.

[0110] Furthermore, there are currently two common methods for obtaining salt caverns: one is by modifying abandoned old cavities, and the other is by artificially constructing new salt caverns. For obtaining salt caverns by modifying abandoned old cavities, single-well, single-cavity modification technology is typically used; for artificially constructing new salt caverns, conventional well drilling technology is typically used. However, both methods have certain shortcomings and require high-quality salt deposits. The salt layer thickness and depth in the target study area have limited reserves that meet the corresponding technical requirements, thus limiting the use of salt caverns for hydrogen storage. This embodiment proposes a system that considers multiple salt cavern acquisition technologies and plans the combination of these technologies. This expands the range of usable salt deposits (different technologies have different salt deposit requirements; considering more technologies increases the amount of salt deposits that meet the requirements), alleviating the limitation on hydrogen storage caused by a shortage of suitable salt deposits. Simultaneously, since the new capacity of the salt cavern unit is limited by the volume of the old cavities suitable for reservoir construction or the salt deposit reserves in the study area, an inequality constraint is added to the maximum hydrogen storage capacity of the hydrogen storage salt cavern unit. Therefore, the linearized mathematical model of the hydrogen storage salt cavern unit is:

[0111] (twenty two);

[0112] (twenty three);

[0113] in, It is the first i The upper limit of the installed capacity of the hydrogen storage salt cavern unit is determined by the volume of the old cavity or the salt mine reserves in the study area that are suitable for this type of salt cavern acquisition method.

[0114] In addition, this embodiment adds cushion gas constraint and exhaust constraint to the traditional hydrogen storage salt cavern unit model.

[0115] Specifically:

[0116] When a salt cavern is forcibly vented under insufficient pressure, its walls will experience abnormal stress, leading to problems such as collapse, cracks, or gas leakage. Cushion gas can provide pressure support when gas is released from the salt cavern, which is crucial for maintaining the minimum pressure threshold within the cavern. This ensures the stability and sealing of the salt cavern structure, preventing the aforementioned problems.

[0117] Therefore, this embodiment introduces cushion gas constraint for salt cavern hydrogen storage units:

[0118] (twenty four);

[0119] (25);

[0120] in, Indicates the first i The required percentage of cushion gas for safe operation of a hydrogen storage salt cavern unit; It is a 0-1 variable; when the hydrogen storage salt cavern unit meets the cushion gas requirements... A value of 1 indicates that the hydrogen storage salt cavern unit can safely release hydrogen at this time. When the hydrogen storage salt cavern unit does not meet the cushion gas requirements... A value of 0 indicates that the hydrogen storage salt cavern unit cannot release hydrogen at this time.

[0121] Furthermore, the maximum discharge rate per unit time of the hydrogen storage cavern unit, which inputs or releases hydrogen through a well, is limited by factors such as wellhead area and gas pressure. To prevent the system's operating results from exceeding the physical limits of the hydrogen storage cavern unit's intake and exhaust, thus causing equipment overload or energy supply interruption, this embodiment combines parameters such as wellhead area and gas pressure, and uses fluid dynamics formulas to calculate its upper limit for exhaust, thereby restricting relevant operating variables. The resulting exhaust constraint is as follows:

[0122] (26);

[0123] (27);

[0124] in, It is the maximum gas volume that can pass through the i-th type of hydrogen storage salt cavern unit per unit time under the wellhead restriction; and These are the gas pressure and temperature inside the salt cavern of the i-th type of hydrogen storage salt cavern unit; It is the specific heat ratio of hydrogen; This is the exclusion coefficient, which is usually taken as 0.85-0.95; The density is the specific gravity of air. In this embodiment, the hydrogen stored in the hydrogen storage salt cavern unit is at this point. The value is 0.069; This is a unit conversion factor; Let be the wellhead area of ​​the i-th type of hydrogen storage salt cavern unit.

[0125] In this embodiment, in addition to the hydrogen energy-related aspects mentioned above, waste heat recovery from electrolyzers and fuel cell units, combined heat and power units, and thermal storage tanks are also considered to improve the hydrogen-thermal coupling and electric-thermal coupling aspects.

[0126] Specifically, it includes the following:

[0127] 1. Combined heat and power (CHP) units can generate electricity and heat simultaneously. The heat can be used for heating, industrial steam, or hot water, thereby improving energy efficiency.

[0128] In the thermal energy system section, combined heat and power (CHP) units should meet the following requirements:

[0129] (28);

[0130] In the formula, and They are t Time of the first i The heat production capacity and power transmission capacity of a combined heat and power unit; It is the first i The conversion coefficient of heat energy generated by a combined heat and power unit.

[0131] 2. Waste heat recovery process.

[0132] In an electrolyzer unit, in addition to converting electrical energy into hydrogen energy during operation, a portion of the energy is also converted into heat energy. This allows for the recovery of some waste heat to meet heat load requirements.

[0133] The waste heat recovery process of the electrolytic cell unit is represented as follows:

[0134] (29);

[0135] In the formula, yes t Time of the first i The heat output of the electrolytic cell unit; It is the first i The conversion efficiency of waste heat recovery in electrolytic cell units; Indicates the first i The conversion efficiency of an electrolyzer unit from electrical energy to hydrogen energy; Indicates the first i The power consumption of a type of electrolytic cell unit.

[0136] The waste heat recovery process of a fuel cell unit is represented as follows:

[0137] (30);

[0138] In the formula, yes t Time of the first i The heat output of this type of fuel cell unit; It is the first i The conversion efficiency of waste heat recovery in fuel cell units; Indicates the first i The conversion efficiency of a fuel cell unit from hydrogen energy to electrical energy; Indicates the first i The power of the electrolyzer unit to output hydrogen; It has a low calorific value, taken as 33.3 kWh / kg; It has a low calorific value, taken as 33.3 kWh / kg.

[0139] 3. Similar to conventional hydrogen storage equipment, the mathematical model of the thermal storage tank unit is as follows:

[0140] (31);

[0141] (32);

[0142] in, yes t Time of the first i The heat storage capacity of the thermal storage tank unit yes t- 1st moment i The heat storage capacity of the thermal storage tank unit yes t Time of the first i The heat storage capacity of the thermal storage tank unit and Represent t Time of the first i The power of the thermal storage tank unit for charging thermal energy and the power for releasing thermal energy; , and They represent t Time of the first i The conversion efficiency of the energy charging process, the conversion efficiency of the energy releasing process, and the self-loss efficiency of the thermal storage tank unit; and They are the first i The maximum stored thermal energy and maximum charging / discharging power of the thermal storage tank unit.

[0143] 4. The integrated energy system model should also satisfy power balance constraints, hydrogen energy balance constraints, and heat balance constraints. The relevant mathematical models are as follows:

[0144] (33);

[0145] (34);

[0146] (35);

[0147] In the formula, It is the power generation capacity of the i-th type of conventional thermal power unit at time t; yes t Time of the first i The power transmission capacity of a combined heat and power unit; and These are the charging power and discharging power of the i-th type of energy storage unit at time t, respectively. , and These are the electrical load, hydrogen load, and thermal load of the study area at time t, respectively, for the prospective year. , , , and These are the number of types of conventional thermal power units, combined heat and power units, electric energy storage units, fuel cell units, and hydrogen storage salt cavern units; and They are t The actual transmission power of wind turbines and photovoltaic units at any given time.

[0148] In this embodiment, to avoid the traditional model focusing only on economic efficiency while ignoring the impact on the environment and salt resources, the objective function of this embodiment considers the total cost of the integrated energy system, carbon dioxide emissions, and salt resource occupancy. By introducing carbon emission and salt resource economic conversion coefficients to unify the dimensions, the synergistic optimization of economic benefits, environmental friendliness, and resource sustainability is achieved.

[0149] The objective function is:

[0150] (36);

[0151] In the formula, , and These represent the total cost of the integrated energy system, carbon dioxide emissions, and salt mine resource consumption, respectively.

[0152] Carbon dioxide emissions are:

[0153] (37);

[0154] in, It is the economic conversion coefficient for carbon dioxide emissions per unit capacity of conventional thermal power units of type i; For time intervals; yes t Time of the first i The power transmission capacity of a combined heat and power unit; It is the economic conversion coefficient of carbon dioxide emissions per unit capacity of the i-th type of cogeneration unit; Let be the actual output power of the i-th type of conventional thermal power unit at time t.

[0155] The amount of salt mine resources occupied is:

[0156] (38);

[0157] in, and These are the conversion coefficient of the economic value of salt mine resources per unit of newly constructed salt caverns and the unit conversion coefficient, respectively. This represents the rated power of the i-th type of hydrogen storage salt cavern unit.

[0158] The total cost of the integrated energy system is:

[0159] (39);

[0160] in, , and These represent the total costs of the electrical system, hydrogen system, and thermal system, respectively.

[0161] Specifically:

[0162] (40);

[0163] (41);

[0164] (42);

[0165] In the formula, , , , , , , , and These represent the relevant costs incurred by conventional thermal power units, combined heat and power units, wind power units, photovoltaic units, electric energy storage units, electrolyzer units, fuel cell units, hydrogen storage salt cavern units, and thermal storage tank units, respectively.

[0166] The relevant costs of each unit are included in the corresponding unit construction costs and unit operating costs. In addition, the unit start-up costs are also considered for conventional thermal power units and cogeneration units.

[0167] The specific mathematical expression is:

[0168] (43);

[0169] (44);

[0170] (45);

[0171] (46);

[0172] (47);

[0173] (48);

[0174] (49);

[0175] (50);

[0176] (51);

[0177] In the formula, , , and These are the amortized investment cost, fixed operating cost, variable operating cost, and start-up cost per unit capacity of the i-th type of conventional thermal power unit; This refers to the existing rated capacity of conventional thermal power units of type i; It is the operating capacity of the i-th type of conventional thermal power unit at time t; , , and These are the amortized investment cost, fixed operating cost, variable operating cost, and start-up cost per unit capacity of the i-th type of cogeneration unit; This refers to the existing rated capacity of the i-th type of cogeneration unit; It is the operating capacity of the i-th type of cogeneration unit at time t; , and These are the amortized investment cost per unit capacity of wind turbine units, fixed operation and maintenance costs, and existing installed capacity. , and These are the amortized investment cost per unit capacity of the photovoltaic unit, the fixed operation and maintenance cost, and the existing installed capacity. and These are the amortized investment cost and fixed operation and maintenance cost per unit capacity of the i-th type of electric energy storage unit; Indicates the first i The power consumption of the electrolytic cell unit; and These are the amortized investment cost and fixed operation and maintenance cost per unit capacity of the i-th type of electrolytic cell unit, respectively. and These are the amortized investment cost and fixed operation and maintenance cost per unit capacity of the i-th type of fuel cell unit; Indicates the first i The power of electrical energy generated by a fuel cell unit; and These are the amortized investment cost and fixed operation and maintenance cost per unit capacity of the i-th type of hydrogen storage salt cavern unit; and These are the amortized investment cost and fixed operation and maintenance cost per unit capacity of the i-th type of thermal storage tank unit; This represents the total rated installed capacity of the i-th type of conventional thermal power units; Let be the actual output power of the i-th type of conventional thermal power unit at time t; This represents the total rated installed capacity of the i-th type of conventional thermal power units; This refers to the total rated installed capacity of the wind turbine units; This refers to the total rated installed capacity of the photovoltaic power generation units; This refers to the rated power of the i-th type of energy storage unit; Let t be the actual discharge power of the i-th type of energy storage unit; Let be the actual charging power of the i-th type of energy storage unit at time t; This refers to the rated power of the type i hydrogen storage salt cavern unit; The rated power of the i-th type of thermal storage tank unit.

[0178] In the conventional operation method, using equation (36) as the objective function and an hourly time interval, a simulation of 8760 hours throughout the year is directly performed. This calculation method only restricts the hydrogen storage capacity of the hydrogen storage salt cavern unit to be equal at the first and last moments, and cannot well reflect and guarantee the characteristics of the hydrogen storage salt cavern unit across seasonality and long cycles. In view of this, this embodiment proposes a two-stage planning method for integrated energy systems.

[0179] Specifically:

[0180] In the first stage, the integrated energy system model operating parameters and salt mine resources are used as inputs. The integrated energy system model operating parameters include various unit operating parameters, various unit cost parameters, various load values ​​and wind and solar resources. Equation (36) is used as the objective function, and the planning simulation is carried out for 12 months of the year with monthly time intervals. The ratio of hydrogen storage capacity to capacity expansion at the end of each time period of the hydrogen storage salt cavern unit is determined and incorporated as a new input parameter into the known quantity of the next stage.

[0181] It's important to clarify that the capacity expansion here is related to the salt mine resource utilization in the objective function. Salt mine resource utilization refers to the salt content, while capacity expansion refers to the maximum hydrogen storage capacity of the hydrogen storage salt cavern unit. The relationship between the two is that the volume of salt mine resources consumed is equal to the volume of the maximum hydrogen storage capacity of the newly built salt cavern.

[0182] In the second stage, the hydrogen storage capacity constraint is generated by combining the new input parameters obtained in the first stage:

[0183] (52);

[0184] in, These are new input parameters obtained from the first stage; t1 refers to the last hour of each month in a year, i.e. ; It is time t1. iHydrogen storage capacity of a hydrogen storage salt cavern unit; It is the first i The maximum hydrogen storage capacity of this type of hydrogen storage salt cavern unit.

[0185] Again, using equation (36) as the objective function, the newly added input parameters obtained in the first stage are added to the original input. Planning simulations are carried out for 8760 hours throughout the year with an hourly interval to determine the system planning strategy including the combined operation of hydrogen storage salt cavern units. This strategy refers to the combination of various units in the integrated energy system, including the combination scheme of various salt cavern construction technologies.

[0186] Compared to conventional operation, the two-stage planning method proposed in this embodiment requires, in addition to specifying the hydrogen storage capacity of the hydrogen storage salt cavern unit, also... In addition to ensuring that the beginning and end times are equal, a constraint on the amount of hydrogen stored at the end of each month has been added. The parameters of the newly added hydrogen storage constraint are derived from the operation results of the first phase, which can ensure the cross-seasonal and long-cycle characteristics of the hydrogen storage salt cavern unit, making the operation results more realistic and accurate.

[0187] Example 2

[0188] This embodiment provides a two-stage planning system for a salt cavern integrated energy system, including:

[0189] The model building module is configured to build a comprehensive energy system model that includes different types of hydrogen storage salt cavern units. The objective function is to minimize the total cost of the comprehensive energy system, carbon dioxide emissions, and salt mine resource consumption. The hydrogen storage constraints, cushion gas constraints, and exhaust constraints of the hydrogen storage salt cavern units are introduced as constraints to build a two-stage planning model.

[0190] The first-stage planning module is configured to be based on a two-stage planning model, taking the operating parameters of the integrated energy system model and salt mine resources as inputs, and performing monthly planning simulations at monthly intervals to determine the ratio of the hydrogen storage capacity of each type of hydrogen storage salt cavern unit to the maximum expansion capacity of the salt cavern at the end of each time period.

[0191] The second-stage planning module is configured to take the ratio as a new input and, under the hydrogen storage capacity constraint constructed based on the new input, perform annual planning simulation at hourly intervals to determine the system planning strategy including the combined operation of hydrogen storage salt cavern units.

[0192] It should be noted that the above modules correspond to the steps described in Embodiment 1, and the examples and application scenarios implemented by the above modules and the corresponding steps are the same, but are not limited to the content disclosed in Embodiment 1. It should also be noted that the above modules, as part of the system, can be executed in a computer system such as a set of computer-executable instructions.

[0193] In further embodiments, the following is also provided:

[0194] An electronic device includes a memory and a processor, as well as computer instructions stored in the memory and running on the processor, wherein the computer instructions, when executed by the processor, perform the method described in Embodiment 1. For brevity, further details are omitted here.

[0195] It should be understood that in this embodiment, the processor can be a central processing unit (CPU), or it can be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or any conventional processor, etc.

[0196] Memory may include read-only memory and random access memory, and provides instructions and data to the processor. A portion of memory may also include non-volatile random access memory. For example, memory may also store information about the device type.

[0197] A computer-readable storage medium for storing computer instructions, which, when executed by a processor, perform the method described in Embodiment 1.

[0198] The method in Example 1 can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules within the processor. The software modules can reside in readily available storage media in the field, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, or registers. This storage medium is located in memory, and the processor reads information from the memory and, in conjunction with its hardware, completes the steps of the above method. To avoid repetition, a detailed description is not provided here.

[0199] A computer program product includes a computer program that, when executed by a processor, implements the method described in Embodiment 1.

[0200] The present invention also provides at least one computer program product tangibly stored on a non-transitory computer-readable storage medium. The computer program product includes computer-executable instructions, such as instructions included in program modules, which execute in a device on a target real or virtual processor to perform the processes / methods described above. Typically, program modules include routines, programs, libraries, objects, classes, components, data structures, etc., that perform specific tasks or implement specific abstract data types. In various embodiments, the functionality of program modules can be combined or divided among program modules as needed. The machine-executable instructions for the program modules can execute within a local or distributed device. In a distributed device, the program modules can reside in both local and remote storage media.

[0201] The computer program code used to implement the methods of the present invention may be written in one or more programming languages. This computer program code may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when executed by the computer or other programmable data processing device, the program code causes the functions / operations specified in the flowcharts and / or block diagrams to be implemented. The program code may be executed entirely on a computer, partially on a computer, as a stand-alone software package, partially on a computer and partially on a remote computer, or entirely on a remote computer or server.

[0202] In the context of this invention, computer program code or related data may be carried by any suitable carrier to enable a device, apparatus, or processor to perform the various processes and operations described above. Examples of carriers include signals, computer-readable media, and the like. Examples of signals may include electrical, optical, radio, sound, or other forms of propagation signals, such as carrier waves, infrared signals, etc.

[0203] Those skilled in the art will recognize that the units and algorithm steps described in connection with the various examples of this embodiment can be implemented in electronic hardware or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this invention.

[0204] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A two-stage planning method for a salt cavern integrated energy system, characterized in that, Comprise: A comprehensive energy system model containing different types of hydrogen storage salt cavern units is constructed, a two-stage planning model is constructed with the objective function of minimizing the total cost of the comprehensive energy system, carbon dioxide emissions and salt mine resource occupation, and the hydrogen storage constraints, cushion gas constraints and exhaust gas constraints of the hydrogen storage salt cavern units are introduced as constraint conditions; The mathematical model of the hydrogen storage salt cavern unit and the hydrogen storage constraint are respectively: ； ； in, yes t Time of the first i Hydrogen storage capacity of a hydrogen storage salt cavern unit; yes t- 1st moment i Hydrogen storage capacity of a hydrogen storage salt cavern unit; and They represent t Time of the first i Hydrogen charging power and hydrogen discharging power of a hydrogen storage salt cavern unit; , and They represent t Time of the first i Hydrogen charging conversion efficiency, hydrogen degassing conversion efficiency, and self-loss efficiency of a hydrogen storage salt cavern unit; and They are the first i The maximum hydrogen storage capacity and maximum charging / discharging power of the hydrogen storage salt cavern unit; It is the first i The upper limit of the installed capacity of hydrogen storage salt cavern units; The cushion gas constraint of the hydrogen storage salt cavern unit is: ； ； in, Indicates the first i The required percentage of cushion gas for safe operation of a hydrogen storage salt cavern unit; It is a 0-1 variable; when the hydrogen storage salt cavern unit meets the cushion gas requirements... A value of 1 indicates that the hydrogen storage salt cavern unit can safely release hydrogen at this time. When the hydrogen storage salt cavern unit does not meet the cushion gas requirements... A value of 0 indicates that the hydrogen storage salt cavern unit cannot release hydrogen at this time; yes t Time of the first i The maximum hydrogen storage capacity of this type of hydrogen storage salt cavern unit; The exhaust gas constraint of the hydrogen storage salt cavern unit is: ； ； wherein, is the maximum gas volume passing through the wellhead of the i-th hydrogen storage cavern unit per unit time under the restriction of the wellhead; and are the gas pressure and temperature in the salt cavern of the i-th hydrogen storage cavern unit, respectively; is the specific heat ratio of hydrogen gas; is the exclusion coefficient; is the specific gravity of air; is the unit conversion coefficient; is the wellhead area of the i-th hydrogen storage cavern unit; Based on the two-stage planning model, the ratio of the hydrogen storage amount of each type of hydrogen storage salt cavern unit to the maximum expansion capacity of the salt cavern at the end of each time period is determined by taking the operating parameters of the comprehensive energy system model and the salt mine resources as inputs and performing monthly planning simulation at a monthly time interval; The ratio is taken as a new input, and the system planning strategy including the combined operation of the hydrogen storage salt cavern units is determined by performing annual planning simulation at an hourly time interval under the hydrogen storage constraint constructed based on the new input.

2. The dual-stage planning method of a salt cavern integrated energy system according to claim 1, wherein, Salt mine resources occupancy Is: ； Wherein, and are the salt mine resource economic value conversion coefficient of unit salt cave newly built capacity and unit conversion coefficient, respectively; is the number of hydrogen storage salt cave units; is the rated power of the i-th hydrogen storage salt cave unit.

3. The dual-stage planning method of a salt cavern integrated energy system of claim 1, wherein, The hydrogen storage constraint is: ； wherein, is the ratio of the hydrogen storage amount to the maximum expansion capacity of the salt cavity; t1 refers to the last hour of each month in a year; is the hydrogen storage amount of the hydrogen storage salt cavity unit of the t1 time. i kind.

4. A dual-stage planning system for a salt cavern integrated energy system, characterized in that, Comprise: The model construction module is configured to construct a comprehensive energy system model containing different types of hydrogen storage salt cavern units, a two-stage planning model is constructed with the objective function of minimizing the total cost of the comprehensive energy system, carbon dioxide emissions and salt mine resource occupation, and the hydrogen storage constraints, cushion gas constraints and exhaust gas constraints of the hydrogen storage salt cavern units are introduced as constraint conditions; The mathematical model of the hydrogen storage salt cavern unit and the hydrogen storage constraint are respectively: ； ； in, yes t Time of the first i Hydrogen storage capacity of a hydrogen storage salt cavern unit; yes t- 1st moment i Hydrogen storage capacity of a hydrogen storage salt cavern unit; and They represent t Time of the first i Hydrogen charging power and hydrogen discharging power of a hydrogen storage salt cavern unit; , and They represent t Time of the first i Hydrogen charging conversion efficiency, hydrogen degassing conversion efficiency, and self-loss efficiency of a hydrogen storage salt cavern unit; and They are the first i The maximum hydrogen storage capacity and maximum charging / discharging power of the hydrogen storage salt cavern unit; It is the first i The upper limit of the installed capacity of hydrogen storage salt cavern units; The cushion gas constraint of the hydrogen storage salt cavern unit is: ； ； in, Indicates the first i The required percentage of cushion gas for safe operation of a hydrogen storage salt cavern unit; It is a 0-1 variable; when the hydrogen storage salt cavern unit meets the cushion gas requirements... A value of 1 indicates that the hydrogen storage salt cavern unit can safely release hydrogen at this time. When the hydrogen storage salt cavern unit does not meet the cushion gas requirements... A value of 0 indicates that the hydrogen storage salt cavern unit cannot release hydrogen at this time; yes t Time of the first i The maximum hydrogen storage capacity of this type of hydrogen storage salt cavern unit; The exhaust gas constraint of the hydrogen storage salt cavern unit is: ； ； wherein, is the maximum gas volume passing through the wellhead of the i-th hydrogen storage cavern unit per unit time under the wellhead restriction; and are the gas pressure and temperature in the salt cavern of the i-th hydrogen storage cavern unit, respectively; is the specific heat ratio of hydrogen gas; is the exclusion coefficient; is the specific gravity of the gas air; is the unit conversion coefficient; is the wellhead area of the i-th hydrogen storage cavern unit; The first-stage planning module is configured to determine the ratio of the hydrogen storage amount of each type of hydrogen storage salt cavern unit to the maximum expansion capacity of the salt cavern at the end of each time period by taking the operating parameters of the comprehensive energy system model and the salt mine resources as inputs and performing monthly planning simulation at a monthly time interval based on the two-stage planning model. The second-stage planning module is configured to take the ratio as a new input, and determine the system planning strategy including the combined operation of the hydrogen storage salt cavern units by performing annual planning simulation at an hourly time interval under the hydrogen storage constraint constructed based on the new input.

5. An electronic device, comprising: A computer program product comprising a memory and a processor and computer instructions stored on the memory and run on the processor, when the computer instructions are run by the processor, the method of any one of claims 1-3 is completed.

6. A computer-readable storage medium, characterized in that, A computer program product for storing computer instructions, when the computer instructions are executed by the processor, the method of any one of claims 1-3 is completed.

7. A computer program product, characterised in that, A computer program product for storing computer instructions, when the computer instructions are executed by the processor, the method of any one of claims 1-3 is completed.

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