Off-grid integrated energy system configuration method and device suitable for plateau mining areas

Abstract

The present invention discloses a method and device for configuring an off-grid integrated energy system suitable for plateau mining areas, relating to the field of energy system configuration, including: setting three configuration schemes in the off-grid integrated energy system of the plateau mining area and modeling them to obtain the off-grid integrated energy system model of the plateau mining area; obtaining the technical parameters, economic parameters, solar energy resources and annual load of each device, constructing the full life cycle cost of the off-grid integrated energy system model of the plateau mining area under different configuration schemes, and solving the problem with the minimum full life cycle cost as the optimization goal under the constraints to obtain the capacity of each device; establishing economic indicators and technical indicators to evaluate the economy and reliability of the capacity of each device in the off-grid integrated energy system of the plateau mining area in different configuration schemes, and determining the optimal configuration scheme. The present invention solves the problem of how to reasonably set up and evaluate the energy system configuration of the plateau mining area.

Description

Technical Field

[0001] The present invention relates to the field of energy system configuration, and in particular to an off-grid integrated energy system configuration method and device suitable for plateau mining areas. Background Art

[0002] With the rapid development of the global economy and human society, global demand for energy is increasing. Mining areas, as core suppliers of energy and mineral resources, are facing multiple challenges and transformation opportunities. Mining areas, located at altitudes above 4,000 meters, are prone to extreme weather and face high transmission line construction costs. They rely heavily on diesel generators or small off-grid systems. However, diesel generators are costly, polluting, and unstable, making them difficult to support the high power requirements and stable operation of equipment in large mining areas. Integrated energy systems in mining areas involve multiple energy sources, leveraging the region's abundant solar resources and deploying renewable energy-based energy station grid solutions. Therefore, maximizing the use of new energy, ensuring the mining area's energy supply, meeting the system's diverse energy needs, and promoting green development are pressing challenges. Summary of the Invention

[0003] The purpose of this application is to propose an off-grid integrated energy system configuration method and device suitable for plateau mining areas in response to the above-mentioned technical problems.

[0004] In a first aspect, the present invention provides a method for configuring an off-grid integrated energy system suitable for use in plateau mining areas, comprising the following steps:

[0005] Establish an off-grid integrated energy system for plateau mining areas; the off-grid integrated energy system for plateau mining areas includes energy supply equipment, energy storage equipment, and energy conversion equipment; the energy supply equipment includes photovoltaic power stations, the energy storage equipment includes electrochemical energy storage, and the energy conversion equipment includes electric heaters and electric steam boilers;

[0006] Three configuration schemes were set up in the off-grid integrated energy system of plateau mining area and modeled, and the off-grid integrated energy system model of plateau mining area was obtained. The three configuration schemes included the setting of a solar thermal power station, the setting of no solar thermal power station, and the introduction of a separate steam generation system based on the solar thermal power station in the off-grid integrated energy system of plateau mining area.

[0007] Obtain the technical parameters, economic parameters, solar energy resources and annual load conditions of each device in the off-grid integrated energy system of the plateau mining area, construct the full life cycle cost of the off-grid integrated energy system model of the plateau mining area under different configuration schemes, and solve the optimization goal with the minimum full life cycle cost by combining the technical parameters, economic parameters, solar energy resources and annual load conditions of each device under the constraints, and obtain the capacity of each device in the off-grid integrated energy system of the plateau mining area under different configuration schemes; wherein, the full life cycle cost includes the equipment construction investment cost and the equipment operation and maintenance cost, and the constraints include the operation constraints of the solar thermal power station, the operation constraints of the electric heater, the operation constraints of the electric steam boiler, the electrochemical energy storage constraints, the site constraints, the system electric power balance constraints, the system thermal power balance constraints and the system steam thermal power balance constraints;

[0008] Economic indicators based on the levelized cost of electricity and technical indicators based on the load power shortage rate are established to evaluate the economic and reliability capacity of each equipment in the off-grid integrated energy system in plateau mining areas in different configuration schemes, and determine the optimal configuration scheme.

[0009] As a preferred option, the off-grid integrated energy system model for plateau mining areas includes a photovoltaic power station model, a solar thermal power station model, an electrochemical energy storage model, an electric heater model, and an electric steam boiler model;

[0010] In a photovoltaic power station, several photovoltaic panels absorb solar energy and generate electricity. The expression of the photovoltaic power station model is shown as follows:

[0011] ;

[0012] in, is the power generation of the photovoltaic power station in the tth period, is the rated capacity of a single photovoltaic panel under standard test conditions, and are the horizontal irradiance and temperature in period t, and are the horizontal irradiance and temperature of the standard test conditions, is the power temperature coefficient; is the number of photovoltaic panels in the photovoltaic power station, which is related to the capacity of the photovoltaic power station;

[0013] If a CSP plant is set up, the solar radiation is first absorbed by the mirror field, converted into heat energy by the heat collection device, and used for direct power generation by the steam turbine generator or molten salt energy storage. The expression of the CSP plant model is shown as follows:

[0014] ;

[0015] in, is the total power of solar radiation absorbed by the CSP station, is the mirror field area, is the direct normal solar irradiance in period t; is the thermal power absorbed by the collector during the tth period, is the comprehensive light and heat efficiency of the solar collector; is the heat storage capacity of molten salt energy storage in period t, is the heat storage capacity of molten salt energy storage in the t-1 period, is the self-loss coefficient of molten salt energy storage, and is the charging power and releasing power of the molten salt energy storage in the tth period, and The heat charging efficiency and heat releasing efficiency of molten salt energy storage; is the power generation of the CSP station in period t, is the thermal power used for power generation by the CSP station in period t, is the efficiency of the turbine generator, is the time interval;

[0016] If there is no CSP station, the total power of solar radiation absorbed by the CSP station is 0; the heat storage capacity of the molten salt energy storage is 0; the power generation of the CSP station is 0; the expression of the electrochemical energy storage model is as follows:

[0017] ;

[0018] in, is the amount of electrochemical energy storage in period t, is the amount of electrochemical energy storage in the t-1 period, is the self-loss coefficient of electrochemical energy storage, and is the charging efficiency and discharging efficiency of electrochemical energy storage, and is the charging power and discharging power of the electrochemical energy storage in the tth period;

[0019] The expression of the electric heater model is shown as follows:

[0020] ;

[0021] in, is the heating power of the electric heater in the tth period, is the electric power consumed by the electric heater in the tth period, is the efficiency of the electric heater;

[0022] The expression of the electric steam boiler model is shown as follows:

[0023] ;

[0024] in, is the steam thermal power generated by the electric steam boiler in period t, is the electric power consumed by the electric steam boiler in the tth period, is the efficiency of the electric steam boiler.

[0025] As a preferred option, the expression of the life cycle cost is as follows:

[0026] ;

[0027] in, represents the total life cycle cost, Equipment operation and maintenance costs, Investment costs for equipment construction;

[0028] The expressions for equipment operation and maintenance costs and equipment construction investment costs are as follows:

[0029] ;

[0030] ;

[0031] in, , i refers to each device, They correspond to photovoltaic power stations, solar thermal power stations, electrochemical energy storage, electric heaters and electric steam boilers respectively. is the operation and maintenance cost of equipment i, and are the fixed operation and maintenance cost of the capacity of device i and the variable operation and maintenance cost per unit output power, is the purchase cost per unit capacity of equipment i, is the installation cost per unit area of ​​equipment i; represents the construction investment cost of equipment i, is the capacity of device i; t represents the number of hours in a year, t=1, 2, 3, ..., 8760; and Represent the area of ​​a single photovoltaic panel and a single heliostat, Indicates the purchase cost per unit capacity of molten salt energy storage, Indicates the capacity of molten salt energy storage; and Represent the number of photovoltaic panels and heliostats respectively; is the construction investment cost of equipment i, is the service life of device i, is the inflation rate.

[0032] As a preferred embodiment, the expression of the operation constraint of the CSP plant is as follows:

[0033] ;

[0034] in, and is a binary variable representing the charging and discharging state of molten salt energy storage. =1 means that the molten salt energy storage is in the heat storage state, =1 means that the molten salt energy storage is in the heat release state, and heat storage and heat release do not exist at the same time; is the maximum heat storage power, is the maximum heat release power, is the maximum power of the CSP station;

[0035] The expression of electrochemical energy storage operation constraints is shown as follows:

[0036] ;

[0037] in, and is a binary variable representing the charge and discharge state of electrochemical energy storage, =1 means the electrochemical energy storage is in the charging state, =1 means that the electrochemical energy storage is in the discharge state, and charging and discharging do not exist at the same time; is the maximum charging power of electrochemical energy storage, is the maximum discharge power of electrochemical energy storage;

[0038] The expression of site constraints is as follows:

[0039] ;

[0040] in, Indicates the total area of ​​the project;

[0041] The system electric power balance constraint expression is as follows:

[0042] ;

[0043] in, is the electric load of the off-grid integrated energy system in the plateau mining area during the t period;

[0044] The expression of the system thermal power balance constraint is as follows:

[0045] ;

[0046] in, is the heat load of the off-grid integrated energy system in the plateau mining area during the t period, is the thermal storage power of the molten salt energy storage in the tth period, The heat energy required to convert into industrial steam in period t;

[0047] The expression of the system steam thermal power balance constraint is as follows:

[0048] ;

[0049] in, is the steam heat load of the off-grid integrated energy system in the plateau mining area during the t period, is the steam thermal power generated by the electric steam boiler in period t, is the steam thermal power generated by the separation steam generation system in the tth period; if the separation steam generation system is not configured in the CSP plant, the steam thermal power generated by the separation steam generation system in the tth period is 0;

[0050] If a separate steam generation system is configured in a CSP plant, the separate steam generation system is used to generate steam using part of the heat energy in the collector and combine it with the steam generated by the steam generator to meet the steam load demand of the mining area. The expression of the separate steam generation system model obtained after modeling is shown in the following formula:

[0051] ;

[0052] in, is the steam thermal power generated by the separation steam generation system in period t, is the steam conversion efficiency.

[0053] As a preferred option, the expression of levelized cost of electricity is as follows:

[0054] ;

[0055] in, represents the levelized cost of electricity;

[0056] The expression of load power failure rate is as follows:

[0057] ;

[0058] in, Indicates the load power failure rate, The number of hours that the off-grid integrated energy system in the plateau mining area cannot meet the electricity load.

[0059] Preferably, the method for solving the optimization objective includes the YALMIP toolbox and the Gurobi solver in MATLAB.

[0060] In a second aspect, the present invention provides an off-grid integrated energy system configuration device suitable for plateau mining areas, comprising:

[0061] The system building module is configured to establish an off-grid integrated energy system for plateau mining areas; the off-grid integrated energy system for plateau mining areas includes energy supply equipment, energy storage equipment, and energy conversion equipment; the energy supply equipment includes a photovoltaic power station, the energy storage equipment includes electrochemical energy storage, and the energy conversion equipment includes an electric heater and an electric steam boiler;

[0062] A modeling module is configured to set up three configuration schemes in the off-grid integrated energy system of the plateau mining area and perform modeling to obtain a model of the off-grid integrated energy system of the plateau mining area. The three configuration schemes respectively include setting up a solar thermal power station in the off-grid integrated energy system of the plateau mining area, not setting up a solar thermal power station, and introducing a separate steam generation system on the basis of the solar thermal power station.

[0063] The optimization solution module is configured to obtain the technical parameters, economic parameters, solar energy resources and annual load conditions of each device in the off-grid integrated energy system of the plateau mining area, and construct the full life cycle cost of the off-grid integrated energy system model of the plateau mining area under different configuration schemes. Under the constraints, the technical parameters, economic parameters, solar energy resources and annual load conditions of each device are combined to solve the optimization goal with the minimum full life cycle cost, and the capacity of each device in the off-grid integrated energy system of the plateau mining area in different configuration schemes is obtained; wherein the full life cycle cost includes the equipment construction investment cost and the equipment operation and maintenance cost, and the constraints include the operation constraints of the solar thermal power station, the operation constraints of the electric heater, the operation constraints of the electric steam boiler, the electrochemical energy storage constraints, the site constraints, the system electric power balance constraints, the system thermal power balance constraints and the system steam thermal power balance constraints;

[0064] The evaluation module is configured to establish economic indicators based on the levelized cost of electricity and technical indicators based on the load power shortage rate to evaluate the economic and reliability capacity of each equipment in the off-grid integrated energy system in the plateau mining area in different configuration schemes, and determine the optimal configuration scheme.

[0065] In a third aspect, the present invention provides an electronic device comprising one or more processors; a storage device for storing one or more programs, wherein when the one or more programs are executed by one or more processors, the one or more processors implement the method described in any implementation manner in the first aspect.

[0066] In a fourth aspect, the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method described in any implementation manner in the first aspect.

[0067] In a fifth aspect, the present invention provides a computer program product, comprising a computer program, which implements the method described in any implementation manner in the first aspect when the computer program is executed by a processor.

[0068] Compared with the prior art, the present invention has the following beneficial effects:

[0069] (1) The off-grid integrated energy system configuration method suitable for plateau mining areas proposed in the present invention combines the energy consumption situation and geographical location characteristics of the mining area to construct an off-grid integrated energy system for the plateau mining area and sets three configuration schemes for it. Combined with the constraints, the optimization goal of minimizing the whole life cycle cost is solved to obtain the capacity of each equipment, and the economic and technical indicators under different configuration schemes are further evaluated. It can effectively overcome the limitations of the traditional energy supply mode of the mining area, significantly improve the economy and reliability of the mining area energy system, and provide a new way to solve the energy dilemma of the mining area.

[0070] (2) The off-grid integrated energy system configuration method suitable for plateau mining areas proposed in the present invention constructs an off-grid mining area energy system with photovoltaic power stations and solar thermal power stations as the main body, integrating molten salt energy storage and electrochemical energy storage, which significantly improves the performance of the overall system. Specifically, molten salt energy storage and electrochemical energy storage can reduce the system LCOE and LPSP by 14.17% and 3.24% respectively.

[0071] (3) The proposed off-grid integrated energy system configuration method for plateau mining areas introduces a separate steam generation system to assist in steam supply in a CSP power station, thereby optimizing energy utilization. Research results show that this configuration scheme can further improve the system's economy and reliability, further reducing the LCOE by 14.40% and the LPSP by 0.44%. Therefore, it can effectively reduce the levelized cost of electricity and the probability of load power outages, and has good engineering promotion value. It can be applied to the design and deployment of energy supply systems in plateau areas and areas with weak power grids. BRIEF DESCRIPTION OF THE DRAWINGS

[0072] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0073] Figure 1 A flow chart of a method for configuring an off-grid integrated energy system applicable to plateau mining areas according to an embodiment of the present application;

[0074] Figure 2A diagram of a configuration architecture of an off-grid integrated energy system for a plateau mining area according to an embodiment of the present application;

[0075] Figure 3 Schematic diagram of a solar thermal power station and a separated steam generation system according to an off-grid integrated energy system configuration method applicable to plateau mining areas according to an embodiment of the present application;

[0076] Figure 4 This is a year-round horizontal irradiance distribution diagram of the mining area in an embodiment of the present application;

[0077] Figure 5 This is a year-round direct normal irradiance distribution diagram for a mining area according to an embodiment of the present application;

[0078] Figure 6 This is a full-year heat load diagram for the mining area according to an embodiment of the present application;

[0079] Figure 7 The steam load diagram of the mining area throughout the year in the embodiment of the present application;

[0080] Figure 8 A schematic diagram of an off-grid integrated energy system configuration device applicable to plateau mining areas according to an embodiment of the present application;

[0081] Figure 9 A schematic diagram of the hardware structure of an electronic device provided in an embodiment of the present invention;

[0082] Figure numerals: 101, photovoltaic power station; 102, solar thermal power station; 1021, thermal collector; 1022, steam generator; 1023, steam turbine generator; 1024, molten salt energy storage; 1025, separate steam generation system; 1026, low-temperature storage tank; 1027, high-temperature storage tank; 1028, heliostat; 1029, condenser; 103, electrochemical energy storage; 104, electric heater; 105, electric steam boiler. DETAILED DESCRIPTION

[0083] To make the objectives, technical solutions, and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings. It is apparent that the embodiments described are only some, not all, of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are intended to fall within the scope of protection of the present invention.

[0084] Figure 1 The embodiment of the present application provides a method for configuring an off-grid integrated energy system suitable for plateau mining areas, comprising the following steps:

[0085] S1. Establish an off-grid integrated energy system for plateau mining areas. The off-grid integrated energy system for plateau mining areas includes energy supply equipment, energy storage equipment and energy conversion equipment. Energy supply equipment includes photovoltaic power stations, energy storage equipment includes electrochemical energy storage, and energy conversion equipment includes electric heaters and electric steam boilers.

[0086] Specifically, the architecture of an off-grid integrated energy system for plateau mining areas is established. This system requires three types of equipment: energy supply, energy storage, and energy conversion. As a foundation, the energy supply includes a photovoltaic power station 101, the energy storage includes electrochemical energy storage 103, and the energy conversion includes an electric heater 104 and an electric steam boiler 105.

[0087] S2, set up three configuration schemes in the off-grid integrated energy system of the plateau mining area and model them to obtain the off-grid integrated energy system model of the plateau mining area. The three configuration schemes include setting up a solar thermal power station in the off-grid integrated energy of the plateau mining area, no solar thermal power station, and introducing a separate steam generation system based on the solar thermal power station.

[0088] In a specific embodiment, the off-grid integrated energy system model for plateau mining areas includes a photovoltaic power station model, a solar thermal power station model, an electrochemical energy storage model, an electric heater model, and an electric steam boiler model;

[0089] In the photovoltaic power station 101, a plurality of photovoltaic panels absorb solar energy and generate electricity. The photovoltaic power station model is expressed as follows:

[0090] ;

[0091] in, is the power generation power of the photovoltaic power station 101 in the tth period, is the rated capacity of a single photovoltaic panel under standard test conditions, and are the horizontal irradiance and temperature in period t, and are the horizontal irradiance and temperature of the standard test conditions, is the power temperature coefficient; is the number of photovoltaic panels in the photovoltaic power station 101, which is related to the capacity of the photovoltaic power station 101;

[0092] If a CSP plant 102 is provided, solar radiation is first absorbed by a mirror field in the CSP plant 102, which is then converted into heat energy by a heat collector 1021 and used for direct power generation by a steam turbine generator 1023 or molten salt energy storage 1024. The CSP plant model is expressed as follows:

[0093] ;

[0094] in, is the total power of solar radiation absorbed by the CSP station 102, is the mirror field area, is the direct normal solar irradiance in period t; is the thermal power absorbed by the heat collecting device 1021 during the t-th period, is the comprehensive light and heat efficiency of the heat collecting device 1021; is the heat storage capacity of molten salt energy storage 1024 in period t, is the heat storage capacity of molten salt energy storage 1024 in the t-1 period, is the self-loss coefficient of molten salt energy storage 1024, and is the charging power and releasing power of the molten salt energy storage 1024 in the t period, and The charging efficiency and heat release efficiency of molten salt energy storage 1024; is the power generation of the CSP station 102 in period t, is the thermal power used for power generation by the CSP station 102 in period t, is the efficiency of the turbine generator 1023, is the time interval;

[0095] If it is set as no CSP station 102, the total power of solar radiation absorbed by the CSP station 102 is 0; the heat storage capacity of the molten salt energy storage 1024 is 0; and the power generation capacity of the CSP station 102 is 0.

[0096] The expression of the electrochemical energy storage model is shown as follows:

[0097] ;

[0098] in, is the storage capacity of the electrochemical energy storage 103 in the tth period, is the storage capacity of the electrochemical energy storage 103 in the t-1 period, is the self-loss coefficient of electrochemical energy storage 103, and are the charging efficiency and discharging efficiency of electrochemical energy storage 103, and is the charging power and discharging power of the electrochemical energy storage 103 in the tth period;

[0099] The expression of the electric heater model is shown as follows:

[0100] ;

[0101] in, is the heating power of the electric heater 104 during the t-th period, is the electric power consumed by the electric heater 104 during the t-th period, is the efficiency of the electric heater 104;

[0102] The expression of the electric steam boiler model is shown as follows:

[0103] ;

[0104] in, is the steam thermal power generated by the electric steam boiler 105 during the t-th period, is the electric power consumed by the electric steam boiler 105 during the t-th period, is the efficiency of the electric steam boiler 105.

[0105] Specifically, the off-grid integrated energy system in the plateau mining area and various devices in three configuration schemes were modeled to obtain the corresponding models of various devices. The standard test conditions in the photovoltaic power station model are: =1000W / m 2 、 =25℃, power temperature coefficient Take -0.45% / °C. The CSP plant 102 absorbs solar radiation power and converts it into heat energy through the heat collecting device 1021. The heat energy can be directly used for power generation or stored in molten salt. Therefore, a CSP plant model can be established. In one embodiment, the time interval in the CSP plant model is Taking 1 hour, the electrochemical energy storage model, electric heater model and electric steam boiler model can also be constructed.

[0106] Specifically, refer to Figure 2 , it is possible to configure with or without a CSP plant 102, and on the basis of configuring the CSP plant 102, it is possible to configure a separate steam generation system 1025, so there are three configuration options. Different configuration options affect the electric load, steam load and thermal load of the off-grid integrated energy system in the plateau mining area. Figure 3As shown, in a solar thermal power station 102, a number of heliostats 1028 are arranged around a collector 1021 to track the sun in real time. The mirrors reflect sunlight and focus it onto the collector 1021, heating the low-temperature molten salt that passes through it. The heated molten salt then flows through a pipe into a high-temperature storage tank 1027. When power generation is required, the high-temperature molten salt exchanges heat with water to produce high-temperature, high-pressure steam, which drives a steam turbine generator 1023 to generate electricity. After releasing heat in a steam generator 1022, the molten salt is sent to a low-temperature storage tank 1026 and then circulated back to the collector 1021 for heating. After passing through the steam turbine generator 1023, the steam is condensed into water in a condenser 1029 and further circulated back to the steam generator 1022. Molten salt energy storage 1024 is a device that stores thermal energy converted from solar energy. Once the molten salt reaches a sufficient temperature in the heat collector 1021, it is pumped to a high-temperature storage tank 1027 for storage. When load demand arises, the high-temperature molten salt is pumped from the high-temperature storage tank 1027 to the steam generator 1022, generating superheated steam that drives the connected steam turbine generator 1023 for electricity. After the molten salt has exchanged heat, it is transferred from the outlet of the steam generator 1022 back to the low-temperature storage tank 1026 for storage. Subsequently, under sunlight, the low-temperature molten salt in the low-temperature storage tank 1026 passes through the heat collector 1021, completing the molten salt energy storage 1024 cycle. Taking into account the actual conditions in the mining area (such as plateau areas: large temperature differences between day and night, etc.), a large amount of steam is needed to maintain equipment and prevent equipment from freezing. During the transmission of high-temperature molten salt, a separate steam generation system 1025 can be set up separately to generate steam. The steam generated by this separate steam generation system 1025 is not used to generate electricity, but to meet the steam heat load demand of the mining area. After the steam is generated, the high-temperature molten salt is converted into low-temperature molten salt through heat exchange, and participates in the molten salt energy storage 1024 cycle together.

[0107] S3, obtain the technical parameters, economic parameters, solar energy resources and annual load conditions of each device in the off-grid integrated energy system of the plateau mining area, construct the full life cycle cost of the off-grid integrated energy system model of the plateau mining area under different configuration schemes, and solve the optimization goal with the minimum full life cycle cost based on the technical parameters, economic parameters, solar energy resources and annual load conditions of each device under the constraints, and obtain the capacity of each device in the off-grid integrated energy system of the plateau mining area in different configuration schemes; among which, the full life cycle cost includes the equipment construction investment cost and the equipment operation and maintenance cost, and the constraints include the operation constraints of the solar thermal power station, the operation constraints of the electric heater, the operation constraints of the electric steam boiler, the electrochemical energy storage constraints, the site constraints, the system electric power balance constraints, the system thermal power balance constraints and the system steam thermal power balance constraints.

[0108] In a specific embodiment, the expression of the life cycle cost is as follows:

[0109] ;

[0110] in, represents the total life cycle cost, Equipment operation and maintenance costs, Investment costs for equipment construction;

[0111] The expressions for equipment operation and maintenance costs and equipment construction investment costs are as follows:

[0112] ;

[0113] ;

[0114] in, , i refers to each device, They correspond to photovoltaic power station 101, solar thermal power station 102, electrochemical energy storage 103, electric heater 104 and electric steam boiler 105 respectively. is the operation and maintenance cost of equipment i, and are the fixed operation and maintenance cost of the capacity of device i and the variable operation and maintenance cost per unit output power, is the purchase cost per unit capacity of equipment i, is the installation cost per unit area of ​​equipment i; represents the construction investment cost of equipment i, is the capacity of device i; t represents the number of hours in a year, t=1, 2, 3, ..., 8760; and Represent the area of ​​a single photovoltaic panel and a single heliostat 1028, respectively. Indicates the purchase cost per unit capacity of molten salt energy storage 1024, Indicates the capacity of molten salt energy storage 1024; and Respectively represent the number of photovoltaic panels and heliostats 1028; is the construction investment cost of equipment i, is the service life of device i, is the inflation rate.

[0115] In a specific embodiment, the expression of the operation constraint of the CSP plant is as follows:

[0116] ;

[0117] in, and It is a binary variable, representing the 1024 charging and discharging state of molten salt energy storage. =1 means that the molten salt energy storage 1024 is in the heat storage state, =1 means that the molten salt energy storage 1024 is in the heat release state, and heat storage and heat release do not exist at the same time; is the maximum heat storage power, is the maximum heat release power, is the maximum power of the CSP station 102;

[0118] The expression of electrochemical energy storage operation constraints is shown as follows:

[0119] ;

[0120] in, and is a binary variable representing the charge and discharge state of the electrochemical energy storage 103, =1 indicates that the electrochemical energy storage 103 is in a charging state, =1 indicates that the electrochemical energy storage 103 is in a discharging state, and charging and discharging do not exist at the same time; is the maximum charging power of the electrochemical energy storage 103, is the maximum discharge power of the electrochemical energy storage 103;

[0121] The expression of site constraints is as follows:

[0122] ;

[0123] in, Indicates the total area of ​​the project;

[0124] The system electric power balance constraint expression is as follows:

[0125] ;

[0126] in, is the electric load of the off-grid integrated energy system in the plateau mining area during the t period;

[0127] The expression of the system thermal power balance constraint is as follows:

[0128] ;

[0129] in, is the heat load of the off-grid integrated energy system in the plateau mining area during the t period, is the thermal storage power of molten salt energy storage 1024 in the tth period, The heat energy required to convert into industrial steam in period t;

[0130] The expression of the system steam thermal power balance constraint is as follows:

[0131] ;

[0132] in, is the steam heat load of the off-grid integrated energy system in the plateau mining area during the t period, is the steam thermal power generated by the electric steam boiler 105 during the t-th period, is the steam thermal power generated by the separation steam generation system 1025 during the t-th period; if the separation steam generation system 1025 is not configured, the steam thermal power generated by the separation steam generation system 1025 during the t-th period is 0;

[0133] If a separate steam generation system 1025 is configured in the CSP plant 102, the separate steam generation system 1025 is used to generate steam using part of the heat energy in the heat collector 1021 and combine it with the steam generated by the steam generator 1022 to meet the steam load demand of the mining area. The expression of the separate steam generation system 1025 model obtained after modeling is shown as follows:

[0134] ;

[0135] in, is the steam thermal power generated by the separation steam generation system 1025 during the t-th period, is the steam conversion efficiency.

[0136] Specifically, based on the operating characteristics of each device and subject to constraints, a calculation formula for the full life cycle cost is constructed, including the equipment construction investment cost and the equipment operation and maintenance cost.

[0137] S4. Establish economic indicators based on the levelized cost of electricity and technical indicators based on the load power shortage rate to evaluate the economic and reliability of the capacity of each equipment in the off-grid integrated energy system in plateau mining areas in different configuration schemes, and determine the optimal configuration scheme.

[0138] In a specific embodiment, the expression of the levelized cost of electricity is as follows:

[0139] ;

[0140] in, represents the levelized cost of electricity;

[0141] The expression of load power failure rate is as follows:

[0142] ;

[0143] in, Indicates the load power failure rate, The number of hours that the off-grid integrated energy system in the plateau mining area cannot meet the electricity load.

[0144] In a specific embodiment, the method for solving the optimization target includes the yalmip toolbox and the gurobi solver in matlab.

[0145] Specifically, in the off-grid integrated energy system of the plateau mining area, there are three configuration schemes, namely, a solar thermal power station 102, a non-solar thermal power station 102, and a separated steam generation system 1025 introduced on the basis of the solar thermal power station 102. The configuration results are systematically evaluated, and the system evaluation indicators include economic indicators and technical indicators. Among them, the economic indicator is the levelized cost of electricity (LCOE), which is an indicator to measure the unit power generation cost in the entire life cycle of the energy system. The numerator represents the entire life cycle cost, and the denominator represents the sum of the electric load, thermal load and steam thermal load of the off-grid integrated energy system of the plateau mining area within one year. The technical indicator is the load power shortage rate, which is an indicator to measure the power supply reliability of the energy system. Different configuration schemes will change the indicators. and For example, if the separation steam generation system 1025 is not configured, there is no need to consider the operation and maintenance costs and construction investment costs of the separation steam generation system 1025. This shows that different configuration schemes have different results for the two indicators. The economic parameters, technical parameters, solar energy resources and annual load conditions of each equipment are imported into the off-grid integrated energy system model of the plateau mining area, with minimizing the full life cycle cost as the optimization goal; the optimization goal is optimized and solved through the yalmip toolbox and gurobi solver in matlab, and the economic and technical indicators of each scheme are compared and analyzed, and finally the configuration scheme with the lowest economic and technical indicators is determined as the best configuration scheme.

[0146] The present invention is described below by means of specific embodiments:

[0147] In this example, the distribution of the annual horizontal irradiance (GHI) in the mining area is as follows: Figure 4 As shown, the distribution of direct normal irradiance (DNI) in the mining area throughout the year is as follows Figure 5 As shown in Figure 2, the annual heat load of the mining area is as follows: Figure 6 As shown, the annual steam load of the mining area is as follows Figure 7 The technical parameters of the related equipment of the off-grid integrated energy system for plateau mining areas are shown in Table 1, and the economic parameters of the related equipment of the system are shown in Table 2. In this embodiment, a scheduling cycle is 8760 hours, and the step length is 1 hour.

[0148] Table 1 Technical parameters of relevant equipment

[0149]

[0150] Table 2 Economic parameters of related equipment

[0151]

[0152] In off-grid integrated energy systems for plateau mining areas, energy storage equipment plays a key role in addressing the challenges posed by unique environments, significantly improving the energy system's power supply reliability, operational stability, and economic and environmental performance. The main configuration options for mining area energy storage equipment include electrochemical energy storage 103 and molten salt energy storage 1024. To study the impact of different configuration schemes on the results, this example designed three different configuration schemes, as shown in Table 3. Scheme 1: Off-grid integrated energy system for plateau mining areas without a CSP plant 102; Scheme 2: Off-grid integrated energy system for plateau mining areas equipped with a CSP plant 102 but without a steam separation system; Scheme 3: Off-grid integrated energy system for plateau mining areas equipped with a CSP plant 102 and a separate steam generation system 1025.

[0153] Table 3 Different configuration options:

[0154]

[0155] The configuration results of the corresponding equipment capacity under different schemes are shown in Table 4.

[0156] Table 4: Device configuration results for different configuration schemes:

[0157]

[0158] As can be seen from Table 4, the LCOE and LPSP of Scheme 2 are 1.1728 yuan / kWh and 3.56%, respectively, which are approximately 14.17% and 3.24% lower than those of Scheme 1. This is because the synergistic effect of molten salt energy storage 1024 and electrochemical energy storage 103 can significantly reduce the system's LCOE and LPSP compared to a single type of energy storage configuration:

[0159] (1) Molten salt energy storage 1024 has a low capacity cost and can provide long-term load demand to meet the continuous nighttime demand of mining areas in Tibet. Electrochemical energy storage 103 has a low power cost and is suitable for short-term peak regulation to avoid instantaneous power shortages caused by extreme weather.

[0160] (2) When extreme or continuous low solar irradiance weather occurs in the plateau area, the molten salt energy storage 1024 has less redundancy, but the electrochemical energy storage 103 can temporarily take on part of the charge, providing dual redundancy protection and reducing LPSP.

[0161] Scheme 3 is a further improvement of Scheme 2. It considers the separation of the steam generation system 1025 to provide auxiliary steam for the mining area. As can be seen from the table, Scheme 3 has a comprehensive reduction in LCOE and LPSP compared with Scheme 2, with LCOE decreasing by 14.40% and LPSP decreasing by 0.44%. This further compensates for the shortcomings of Scheme 2 and verifies the effectiveness of the proposed scheme.

[0162] It can be seen that the embodiment of the present application introduces hybrid energy storage of molten salt energy storage 1024 and electrochemical energy storage 103 and a separated steam generation system 1025, which can reduce the LOCE and LPSP of the mining area energy system, achieve coordinated configuration of economy and reliability, and provide an engineering reference for the configuration and deployment of comprehensive energy systems in plateau mining areas.

[0163] Further references Figure 8 As an implementation of the methods shown in the above figures, this application provides an embodiment of an off-grid integrated energy system configuration device suitable for plateau mining areas. Figure 1 Corresponding to the method embodiment shown, the device can be specifically applied to various electronic devices.

[0164] The embodiment of the present application provides an off-grid integrated energy system configuration device suitable for plateau mining areas, including:

[0165] System construction module 1 is configured to establish an off-grid integrated energy system for plateau mining areas; the off-grid integrated energy system for plateau mining areas includes energy supply equipment, energy storage equipment, and energy conversion equipment; the energy supply equipment includes a photovoltaic power station, the energy storage equipment includes electrochemical energy storage, and the energy conversion equipment includes an electric heater and an electric steam boiler;

[0166] The modeling module 2 is configured to set up three configuration schemes in the off-grid integrated energy system of the plateau mining area and perform modeling to obtain the off-grid integrated energy system model of the plateau mining area. The three configuration schemes respectively include setting up a solar thermal power station, no solar thermal power station, and introducing a separate steam generation system on the basis of a solar thermal power station in the off-grid integrated energy system of the plateau mining area; the optimization solution module 3 is configured to obtain the technical parameters, economic parameters, solar energy resources and annual load conditions of each equipment in the off-grid integrated energy system of the plateau mining area, and construct the full life cycle of the off-grid integrated energy system model of the plateau mining area under different configuration schemes. Lifecycle cost: Under the constraints, the technical parameters, economic parameters, solar energy resources and annual load of each device are combined to optimize the minimum lifecycle cost, and the capacity of each device in the off-grid integrated energy system of the plateau mining area in different configuration schemes is obtained; wherein the lifecycle cost includes the equipment construction investment cost and the equipment operation and maintenance cost, and the constraints include the operation constraints of the solar thermal power station, the operation constraints of the electric heater, the operation constraints of the electric steam boiler, the electrochemical energy storage constraints, the site constraints, the system electric power balance constraints, the system thermal power balance constraints and the system steam thermal power balance constraints;

[0167] Evaluation module 4 is configured to establish economic indicators based on the levelized cost of electricity and technical indicators based on the load power shortage rate to evaluate the economic and reliability of the capacity of each device in the off-grid integrated energy system in the plateau mining area in different configuration schemes, and determine the best configuration scheme.

[0168] Figure 9 Schematic diagram of the hardware structure of the electronic device provided by the embodiment of the present invention. Figure 9 As shown, the electronic device of this embodiment includes: a processor 901 and a memory 902; wherein the memory 902 is configured to store computer-executable instructions; and the processor 901 is configured to execute the computer-executable instructions stored in the memory to implement the various steps performed by the electronic device in the above-described embodiment. For details, please refer to the relevant description of the aforementioned method embodiment.

[0169] Optionally, the memory 902 may be independent or integrated with the processor 901 .

[0170] When the memory 902 is independently provided, the electronic device further includes a bus 903 for connecting the memory 902 and the processor 901 .

[0171] An embodiment of the present invention further provides a computer storage medium, in which computer-executable instructions are stored. When the processor 901 executes the computer-executable instructions, the above method is implemented.

[0172] An embodiment of the present invention further provides a computer program product, including a computer program. When the computer program is executed by the processor 901, the above method is implemented.

[0173] In the embodiments provided herein, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the module division is merely a logical functional division. In actual implementation, other division methods may be used. For example, multiple modules may be combined or integrated into another system, or some features may be ignored or not implemented. In addition, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or module, which may be electrical, mechanical or other forms.

[0174] Modules described as separate components may or may not be physically separate, and components shown as modules may or may not be physical units, that is, they may be located in one place or distributed across multiple network elements. Some or all of these modules may be selected to implement the solution of this embodiment based on actual needs.

[0175] In addition, the functional modules in various embodiments of the present invention may be integrated into a single processing unit, each module may exist physically separately, or two or more modules may be integrated into a single unit. The units formed by the above modules may be implemented in the form of hardware or hardware plus software functional units.

[0176] The above-mentioned integrated module implemented in the form of a software function module can be stored in a computer-readable storage medium. The above-mentioned software function module is stored in a storage medium and includes a number of instructions for causing a computer device (which can be a personal computer, server, or network device, etc.) or processor 901 to perform some steps of the methods of various embodiments of the present application.

[0177] It should be understood that the processor 901 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), or application-specific integrated circuits (ASIC). A general-purpose processor may be a microprocessor, or the processor 901 may be any conventional processor 901. The steps of the method disclosed in the present invention may be directly implemented as being executed by the hardware processor 901, or may be implemented by a combination of hardware and software modules in the processor 901.

[0178] The memory 902 may include a high-speed RAM memory, and may also include a non-volatile storage NVM, such as at least one disk memory, and may also be a USB flash drive, a mobile hard disk, a read-only memory, a magnetic disk, or an optical disk.

[0179] Bus 903 can be an Industry Standard Architecture (ISA), a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus. Bus 903 can be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, the bus 903 in the drawings of this application is not limited to only one bus 903 or only one type of bus 903.

[0180] The storage medium may be implemented by any type of volatile or non-volatile memory device, or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The storage medium may be any available medium that can be accessed by a general-purpose or special-purpose computer.

[0181] An exemplary storage medium is coupled to the processor 901, so that the processor 901 can read information from the storage medium and write information to the storage medium. Of course, the storage medium can also be an integral part of the processor 901. The processor 901 and the storage medium can be located in an application-specific integrated circuit (ASIC). Of course, the processor 901 and the storage medium can also exist as discrete components in an electronic device or a main control device.

[0182] Those skilled in the art will appreciate that all or part of the steps in the above-described method embodiments can be implemented using hardware associated with program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments. The aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0183] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for configuring an off-grid integrated energy system suitable for plateau mining areas, characterized in that: The following steps are involved: Establishing an off-grid integrated energy system for plateau mining areas; the off-grid integrated energy system for plateau mining areas includes energy supply equipment, energy storage equipment, and energy conversion equipment; the energy supply equipment includes a photovoltaic power station, the energy storage equipment includes electrochemical energy storage, and the energy conversion equipment includes an electric heater and an electric steam boiler; Three configuration schemes are set in the off-grid integrated energy system of the plateau mining area and modeled to obtain a model of the off-grid integrated energy system of the plateau mining area. The three configuration schemes respectively include setting a solar thermal power station, no solar thermal power station, and introducing a separate steam generation system on the basis of a solar thermal power station in the off-grid integrated energy system of the plateau mining area; The technical parameters, economic parameters, solar energy resources and annual load of each device in the off-grid integrated energy system of the plateau mining area are obtained, and the full life cycle cost of the off-grid integrated energy system model of the plateau mining area under different configuration schemes is constructed. Under the constraints, the technical parameters, economic parameters, solar energy resources and annual load of each device are combined to solve the optimization goal with the minimum full life cycle cost, and the capacity of each device in the off-grid integrated energy system of the plateau mining area under different configuration schemes is obtained; wherein, the full life cycle cost includes the equipment construction investment cost and the equipment operation and maintenance cost. The expression of the full life cycle cost is as follows: F total =F O&M +F const ; Among them, F total represents the life cycle cost, F O&M is the equipment operation and maintenance cost, F const Investment costs for equipment construction; The expressions of the equipment operation and maintenance cost and equipment construction investment cost are as follows: Where i = pv,csp,es,eh,esb, i refers to each device, pv,csp,es,eh,esb corresponds to photovoltaic power station, solar thermal power station, electrochemical energy storage, electric heater and electric steam boiler respectively. is the operation and maintenance cost of equipment i, and are the fixed operation and maintenance cost of the capacity of device i and the variable operation and maintenance cost per unit output power, is the purchase cost per unit capacity of equipment i, is the installation cost per unit area of ​​equipment i; represents the construction investment cost of equipment i, E i is the capacity of device i; t represents the number of hours in a year, t = 1, 2, 3, ..., 8760; A pv With A csp Represent the area of ​​a single photovoltaic panel and a single heliostat, Indicates the purchase cost per unit capacity of molten salt energy storage, E h Indicates the capacity of molten salt energy storage; N pv With N csp Represent the number of photovoltaic panels and heliostats respectively; is the construction investment cost of equipment i, L i is the service life of equipment i, v is the inflation rate, P t pv is the power generation of the photovoltaic power station in the tth period, P t eh is the electric power consumed by the electric heater in the tth period, P t e,cha With P t e,dis is the charging power and discharging power of the electrochemical energy storage in the tth period, P t esb is the electric power consumed by the electric steam boiler in the tth period, P t h,cha With P t h,dis is the charging power and discharging power of the molten salt energy storage in time period t; the constraints include the operation constraints of the solar thermal power station, the operation constraints of the electric heater, the operation constraints of the electric steam boiler, the electrochemical energy storage constraints, the site constraints, the system electric power balance constraints, the system thermal power balance constraints, and the system steam thermal power balance constraints; Economic indicators based on the levelized cost of electricity and technical indicators based on the load power shortage rate are established to evaluate the economic and reliability of the capacity of each equipment in the off-grid integrated energy system in the plateau mining area in different configuration schemes, and determine the best configuration scheme.

2. The off-grid integrated energy system configuration method applicable to plateau mining areas according to claim 1 is characterized in that: The off-grid integrated energy system model for plateau mining areas includes a photovoltaic power station model, a solar thermal power station model, an electrochemical energy storage model, an electric heater model, and an electric steam boiler model; The photovoltaic power station absorbs solar energy and generates electricity through a number of photovoltaic panels. The expression of the photovoltaic power station model is shown in the following formula: Among them, P rated is the rated capacity of a single photovoltaic panel under standard test conditions, G t With T t are the horizontal irradiance and temperature in the t period, G STC With T STC are the horizontal irradiance and temperature under standard test conditions, β is the power temperature coefficient; N pv is the number of photovoltaic panels in the photovoltaic power station, which is related to the capacity of the photovoltaic power station; If a CSP plant is configured, the solar radiation is first absorbed by a mirror field, converted into heat energy by a heat collector, and used for direct power generation by a steam turbine generator or molten salt energy storage. The CSP plant model is expressed as follows: Among them, P t DNI is the total power of solar radiation absorbed by the CSP station, A sf is the mirror field area, is the direct normal solar irradiance in the tth period; P t solar is the thermal power absorbed by the collector during the tth period, η sf is the comprehensive light and heat efficiency of the solar collector; is the heat storage capacity of molten salt energy storage in period t, is the heat storage capacity of molten salt energy storage in the t-1 period, η h is the self-loss coefficient of molten salt energy storage, η hc and η hd is the charging efficiency and heat release efficiency of molten salt energy storage; P t csp is the power generation of the CSP station in period t, P t h,elec is the thermal power used for power generation in the CSP station in period t, η se is the efficiency of the steam turbine generator, Δt is the time interval; If it is set as no CSP station, the total power of solar radiation absorbed by the CSP station is 0; the heat storage of molten salt energy storage is 0; and the power generation of the CSP station is 0; The expression of the electrochemical energy storage model is shown below: in, is the amount of electrochemical energy storage in period t, is the electrochemical energy storage capacity in the t-1 period, η e is the self-loss coefficient of electrochemical energy storage, η ec and η ed is the charging efficiency and discharging efficiency of electrochemical energy storage; The expression of the electric heater model is shown as follows: P.S t eh,h Hη eh P.S t eh 100. Among them, P t eh,h is the heating power of the electric heater in the tth period, η eh is the efficiency of the electric heater; The expression of the electric steam boiler model is shown below: P.S t esb,steam Hη esb P.S t esb 100. Among them, P t esb,steam is the steam thermal power generated by the electric steam boiler in the tth period, η esb is the efficiency of the electric steam boiler.

3. The off-grid integrated energy system configuration method applicable to plateau mining areas according to claim 2 is characterized in that: The expression of the operation constraint of the CSP plant is as follows: in, and is a binary variable representing the charging and discharging state of molten salt energy storage. Indicates that the molten salt energy storage is in the heat storage state. Indicates that the molten salt energy storage is in a heat release state, and heat storage and heat release do not exist at the same time; is the maximum heat storage power, is the maximum heat release power, is the maximum power of the CSP station; The expression of the electrochemical energy storage operation constraint is shown as follows: in, and is a binary variable representing the charge and discharge state of electrochemical energy storage, Indicates that the electrochemical energy storage is in a charging state. Indicates that the electrochemical energy storage is in a discharge state, and charging and discharging do not exist at the same time; is the maximum charging power of the electrochemical energy storage, is the maximum discharge power of the electrochemical energy storage; The site constraint expression is as follows: N pv A pv +N csp A csp ≤A all ; Among them, A all Indicates the total area of ​​the project; The system electric power balance constraint expression is as follows: P t pv +P t e,dis +P t csp =P t eload +P t e,cha +P t eh +P t esb ; Among them, P t eload is the electric load of the off-grid integrated energy system in the plateau mining area during the t period; The expression of the system thermal power balance constraint is shown as follows: P t solar +P t eh,h +P t h,dis =P t hload +P t h,cha +P t h,steam +P t h,elec ; Among them, P t hload is the heat load of the off-grid integrated energy system in the plateau mining area during the tth period, P t h,cha is the thermal storage power of the molten salt energy storage in the tth period, P t h,steam The heat energy required to convert into industrial steam in period t; The expression of the system steam thermal power balance constraint is as follows: P t sload =P t csp,steam +P t esb,steam ; Among them, P t sload is the steam heat load of the off-grid integrated energy system in the plateau mining area during the tth period, P t esb,steam is the steam thermal power generated by the electric steam boiler in the tth period, P t csp,steam is the steam thermal power generated by the separation steam generation system in the tth period; if the separation steam generation system is not configured in the CSP plant, the steam thermal power generated by the separation steam generation system in the tth period is 0; If a separate steam generation system is configured in a CSP plant, the separate steam generation system is used to generate steam using part of the heat energy in the collector and combine it with the steam generated by the steam generator to meet the steam load demand of the mining area. The expression of the separate steam generation system model obtained after modeling is shown in the following formula: P.S t csp,steam Hη sg P.S t h,steam 100. Among them, P t csp,steam is the steam thermal power generated by the separation steam generation system in the tth period, η sg is the steam conversion efficiency.

4. The off-grid integrated energy system configuration method applicable to plateau mining areas according to claim 3 is characterized in that: The expression of the levelized cost of electricity is as follows: Among them, LCOE represents the levelized cost of electricity; The expression of the load power failure rate is shown as follows: Among them, LPSP represents the load power failure rate, N[(P t csp +P t e,dis +P t pv ) <P t eload ] is the number of hours that the off-grid integrated energy system in the plateau mining area cannot meet the electricity load.

5. The off-grid integrated energy system configuration method applicable to plateau mining areas according to claim 1 is characterized in that: The optimization objective is solved by using the yalmip toolbox and the gurobi solver in matlab.

6. An off-grid integrated energy system configuration device suitable for plateau mining areas, adopting the off-grid integrated energy system configuration method suitable for plateau mining areas according to any one of claims 1 to 5, characterized in that: include: A system building module is configured to establish an off-grid integrated energy system for plateau mining areas; the off-grid integrated energy system for plateau mining areas includes energy supply equipment, energy storage equipment, and energy conversion equipment; the energy supply equipment includes a photovoltaic power station, the energy storage equipment includes electrochemical energy storage, and the energy conversion equipment includes an electric heater and an electric steam boiler; a modeling module configured to set three configuration schemes in the off-grid integrated energy system of the plateau mining area and perform modeling to obtain a model of the off-grid integrated energy system of the plateau mining area, wherein the three configuration schemes respectively include setting a solar thermal power station in the off-grid integrated energy system of the plateau mining area, not setting a solar thermal power station, and introducing a separate steam generation system on the basis of the solar thermal power station; The optimization solution module is configured to obtain the technical parameters, economic parameters, solar energy resources and annual load conditions of each device in the off-grid integrated energy system of the plateau mining area, construct the full life cycle cost of the off-grid integrated energy system model of the plateau mining area under different configuration schemes, and solve the optimization goal with the minimum full life cycle cost in combination with the technical parameters, economic parameters, solar energy resources and annual load conditions of each device under the constraint conditions, so as to obtain the capacity of each device in the off-grid integrated energy system of the plateau mining area in different configuration schemes; wherein, the full life cycle cost includes the equipment construction investment cost and the equipment operation and maintenance cost, and the constraint conditions include the operation constraints of the solar thermal power station, the operation constraints of the electric heater, the operation constraints of the electric steam boiler, the electrochemical energy storage constraints, the site constraints, the system electric power balance constraints, the system thermal power balance constraints and the system steam thermal power balance constraints; The evaluation module is configured to establish economic indicators based on the levelized cost of electricity and technical indicators based on the load power shortage rate to evaluate the economic and reliability of the capacity of each equipment in the off-grid integrated energy system in the plateau mining area in different configuration schemes, and determine the best configuration scheme.

7. An electronic device comprising: one or more processors; a storage device for storing one or more programs, When the one or more programs are executed by the one or more processors, the one or more processors implement the method according to any one of claims 1 to 5.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method according to any one of claims 1 to 5 is implemented.

9. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the method according to any one of claims 1 to 5 is implemented.

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