Park shared energy storage optimal configuration and economical efficiency analysis method and system for energy conservation and emission reduction requirements

Abstract

The invention discloses a park shared energy storage optimal configuration and economical efficiency analysis method and system considering energy conservation and emission reduction requirements. By introducing the carbon emission constraint, the energy consumption and emission model of the park multi-type equipment is established, and coordinated optimization of the park energy system between economy and environmental protection is realized. The method comprises the following steps: firstly, comprehensively considering shared energy storage capacity configuration and park equipment operation characteristics from a planning level, secondly, constructing an optimization model taking park comprehensive benefit maximization as a target from an operation level, covering shared energy storage operation constraints, energy power balance constraints, capacity planning constraints, equipment operation constraints and the like, and finally, constructing an optimization model taking the park comprehensive benefit maximization as a target. A mixed integer linear programming method is adopted to solve the model, optimization characteristics of discrete decision and continuous control are considered, and global optimality and implementability of a model solution are ensured. According to the method, the energy utilization efficiency of the park and the economic benefits of the energy storage system can be effectively improved, the carbon emission level and the energy consumption can be remarkably reduced, and a technical path capable of being popularized is provided for achieving green, low-carbon and efficient operation of the park.

Description

Technical Field

[0001] This invention relates to the field of energy storage system optimization and scheduling, specifically to a method and system for optimizing the configuration and economic analysis of shared energy storage in industrial parks to meet energy conservation and emission reduction needs. Background Technology

[0002] my country's energy system is rapidly transforming from a "high-carbon concentrated" to a "low-carbon diversified" model. Industrial parks, as important carriers of energy consumption and carbon emissions, directly impact regional energy efficiency and emission reduction levels through their energy structure and operation. In recent years, the installed capacity of renewable energy sources such as photovoltaics and wind power in industrial parks has continued to grow. However, the volatility and uncertainty of their output have brought new challenges to the safe and stable operation of the park's energy system. At the same time, the load within industrial parks exhibits diversified and time-varying characteristics, and the spatial and temporal distribution differences among different energy media further exacerbate the energy supply and demand imbalance.

[0003] Against this backdrop, shared energy storage systems, due to their flexible energy regulation capabilities and resource sharing characteristics, have become an important means to improve the operational flexibility and overall efficiency of park energy systems. However, existing research mostly focuses on single-entity energy storage planning or operational optimization, lacking a systematic analysis addressing energy conservation and emission reduction needs and the collaborative characteristics of multiple entities. Therefore, it is necessary to study a method for optimizing the allocation and economic analysis of shared energy storage in parks to meet energy conservation and emission reduction requirements. This method should balance carbon constraints, economic efficiency, and system operational safety to achieve the scientific allocation and efficient utilization of energy storage resources, thereby promoting the green, low-carbon transformation and sustainable development of park energy systems. Summary of the Invention

[0004] This invention provides a method for optimizing the configuration and economic analysis of shared energy storage in industrial parks to meet the needs of energy conservation and emission reduction, which can solve the problems mentioned in the background art.

[0005] To address the aforementioned technical problems, this invention provides the following technical solution: a method for optimizing the configuration and economic analysis of shared energy storage in industrial parks to meet energy conservation and emission reduction needs, comprising:

[0006] Considering the needs for energy conservation and emission reduction, establish a multi-type equipment model for the park that integrates carbon emission constraints;

[0007] Based on the park's flexible adjustment characteristics and energy-saving goals, a park energy storage optimization configuration and economic analysis model is constructed to maximize the park's overall benefits. This model includes constraints on the operation of the shared energy storage system, energy and power balance constraints, park equipment capacity planning constraints, and equipment operation constraints.

[0008] A mixed-integer linear programming method is used to establish an optimization problem model that can handle both discrete decision variables and continuous control variables, in order to obtain the optimal solution of the objective function.

[0009] As a preferred embodiment of the method for optimizing the configuration and economic analysis of shared energy storage in industrial parks to meet energy conservation and emission reduction needs as described in this invention, the park energy conversion equipment includes:

[0010] In the optimized configuration of shared energy storage in the park, energy conversion equipment can efficiently convert the electrical energy of new energy sources into a form that can be stored by the energy storage system. When the energy storage releases energy to meet the energy demand of the park, it can convert the stored energy into electrical or thermal energy suitable for the park's equipment, ensuring a stable energy supply.

[0011] (1) Central air conditioning (AC)

[0012] As an energy conversion device for electric cooling in an integrated energy microgrid, the carbon emission equation and energy consumption equation are as follows:

[0013]

[0014]

[0015] in, This is the carbon emission factor of electricity from the power grid, expressed in kg CO2 / kWh. This refers to the power consumption of the central air conditioning system over time, measured in kW. This refers to the carbon emissions of central air conditioning, expressed in kg CO2. This is the cooling load of the central air conditioning system over a given time, measured in kW.

[0016] (2) CCHP system

[0017] The CCHP system includes energy conversion equipment such as GT, GB, Heat Recovery Boiler (HRB), and Refrigeration Machine (RF) in CCHP. The energy conversions involved are gas-to-electricity, gas-to-heat, heat-to-heat, and heat-to-cooling. Their carbon emission equations and energy consumption equations are as follows:

[0018]

[0019]

[0020]

[0021]

[0022]

[0023]

[0024]

[0025]

[0026] in, This is the carbon emission factor of a gas turbine, expressed in kg CO2 / kWh. It is the gas turbine in time The output power, measured in kW. This refers to the carbon emissions of a gas turbine, expressed in kg CO2. This is the carbon emission coefficient of a gas-fired boiler, expressed in kg CO2 / kWh. Is it a gas-fired boiler in time? The output thermal power, measured in kW. This refers to the carbon emissions of a gas-fired boiler, expressed in kg CO2. This is the carbon emission coefficient of the waste heat boiler, expressed in kg CO2 / kWh. Waste heat boiler in time Heat output, in kW. This refers to the carbon emissions from waste heat boilers, expressed in kgCO2. This is the carbon emission factor of electricity from the power grid, expressed in kg CO2 / kWh. It is the refrigeration machine in time Electricity consumption, in kW. This refers to the carbon emissions of the refrigeration unit, measured in kg CO2. It refers to the power generation efficiency of the gas turbine. It is the gas turbine in time The gas consumption power, measured in kW. Is it a gas-fired boiler in time? Heat output, in kW. It refers to the efficiency of the gas-fired boiler. Is it a gas-fired boiler in time? The gas consumption power, measured in kW. It refers to the efficiency of the waste heat boiler. Waste heat boiler in time Input heat, in kW It is the refrigeration machine in time The cooling load, in kW. It is the energy efficiency ratio of the refrigeration unit.

[0027] (3) Electric steam boiler

[0028] The carbon emission equations and energy consumption equations for electric steam boilers are as follows:

[0029]

[0030] ,

[0031] in, This is the carbon emission factor of a steam boiler, expressed in kg CO2 / kWh. It is a steam boiler in time The output steam energy, measured in kW. This refers to the carbon emissions of a steam boiler, expressed in kg CO2. for The electrical power consumption of an industrial steam boiler is measured in kW. The heat production efficiency of industrial steam boilers.

[0032] As a preferred embodiment of the method for optimizing the configuration and economic analysis of shared energy storage in industrial parks to meet energy conservation and emission reduction needs as described in this invention, the objective function of the shared energy storage model to meet energy conservation and emission reduction needs includes:

[0033] ,

[0034] The total investment cost is:

[0035] ,

[0036] The power interaction cost is:

[0037] ,

[0038] The cost of purchasing gas is:

[0039] ,

[0040] Maintenance costs are:

[0041] ,

[0042] The carbon emission cost is:

[0043] ,

[0044] The cost of shared energy storage services is:

[0045] ,

[0046] in, The total investment cost, The discount rate for the equipment. The design life of the equipment. For the first The unit investment planning cost of this type of equipment For the first The planned installation capacity of this type of equipment This refers to the number of equipment types in an integrated energy system. For electricity interaction costs, and They are respectively The electricity sales price and purchase price from the power grid in the industrial park at all times. for The power exchange between the industrial park and the upstream power grid at any given time, in kW. and They are respectively The electricity sales price and purchase price of the shared energy storage system in the park are subject to change. The power exchange between the park and the shared energy storage system at any given time is expressed in kW. The cost of gas purchase includes the total price of natural gas used in gas turbines (GT) and gas boilers (GB). The power supply capacity for the park's energy flow diagram and Combined Cooling Heating Power (CCHP) system, in kW. The conversion efficiency of gas-to-electricity conversion in GT. This refers to the heating power specified in GB standards, in kW. GB represents the conversion efficiency of gas-to-heat conversion. The running cycle is 1 hour. The lower calorific value of natural gas is the heat released when 1 cubic meter of natural gas is completely burned. To maintain costs, , , , , The unit operating power maintenance costs are respectively for photovoltaic power generation units, shared energy storage, industrial steam boilers, steam accumulators, and central air conditioning. and They are respectively The charging and discharging power of the energy storage is shared at all times, in kW; , and respectively, photovoltaic power generation units, industrial steam boilers and air conditioning units in Operating power at any given time, in kW; and They represent The flow rate of steam entering and exiting the steam accumulator at any given time, T=24h; For carbon emission costs, Total carbon emissions, in tons. The price is for carbon, expressed in yuan per ton. To share the cost of energy storage services, Service fee is per unit, expressed in yuan / kW. The total rental fee for the park; Represents the total cost. This refers to the entire lifecycle of the integrated energy system, i.e., the design life of the equipment.

[0047] As a preferred embodiment of the method for optimizing the configuration and economic analysis of shared energy storage in industrial parks to meet energy conservation and emission reduction needs as described in this invention, the shared energy storage operation model includes:

[0048] The park adopts a shared energy storage model, connecting with external shared energy storage systems. This not only significantly improves economic benefits but also simultaneously achieves energy conservation and emission reduction goals. The operational constraints of the shared energy storage are as follows:

[0049] ,

[0050] in, and The charging and discharging power of shared energy storage within a given time period, measured in kW. and For charge / discharge efficiency, Self-discharge rate , These are the charging and discharging state variables of shared energy storage during different time periods, and the charging state during charging. , During discharge , , and These are the upper and lower limits of energy storage capacity, expressed in kW·h. For time steps, the unit is .

[0051] By adopting a shared energy storage model, energy storage resources are no longer limited to a single user but are made available to multiple users. Different users can purchase corresponding services according to their actual needs. With the help of an intelligent management platform and flexible trading mechanisms, energy storage resources can be optimally allocated across the entire network. This model effectively improves energy utilization efficiency and enhances the operational quality of the power system.

[0052] As a preferred embodiment of the method for optimizing the configuration and economic analysis of shared energy storage in industrial parks to meet energy conservation and emission reduction needs, as described in this invention, the energy power balance constraints of the optimized configuration method for shared energy storage in industrial parks include:

[0053] (1) The power balance constraint is:

[0054] ,

[0055] in, for The electrical power purchased from the power grid at any given time, measured in kW; for The park's electricity load demand at all times.

[0056] (2) The thermal power balance constraint is:

[0057] ,

[0058] in, for The park's heat load demand at all times.

[0059] (3) The cold energy power balance constraint is:

[0060] ,

[0061] in, for The park's cooling load demand at all times.

[0062] (4) The steam power balance constraint is:

[0063] ,

[0064] in, for The steam load demand of the industrial park at all times, for The mass flow rate of steam input to the steam accumulator at any given time, expressed in kg / s; Specific enthalpy of the input steam, expressed in kJ / kg; for The mass flow rate of steam output from the steam accumulator at any given time, expressed in kg / s; The specific enthalpy of the output steam, expressed in kJ / kg; For time steps, the unit is .

[0065] As a preferred embodiment of the method for optimizing the configuration and economic analysis of shared energy storage in industrial parks to meet energy conservation and emission reduction needs as described in this invention, the installation capacity planning constraints of the method include:

[0066] ,

[0067] in, , , , , , , , , , These include the planned installation capacity of photovoltaic power generation units, gas-fired boilers, gas turbines, waste heat boilers, chillers, central air conditioning systems, thermal storage tanks, industrial steam boilers, steam accumulator units, and shared energy storage. , , , , , , , , , These are the planned installation capacity limits for photovoltaic generator sets, gas-fired boilers, gas turbines, waste heat boilers, chillers, central air conditioning units, thermal storage tanks, industrial steam boilers, steam accumulator units, and shared energy storage.

[0068] As a preferred embodiment of the method for optimizing the configuration and economic analysis of shared energy storage in parks to meet the needs of energy conservation and emission reduction as described in this invention, wherein: the upper and lower limit constraints for the operation of each device in the park include;

[0069]

[0070] in, , , , , , , , , , These include the original capacity of photovoltaic generator sets, gas-fired boilers, gas turbines, waste heat boilers, refrigeration units, central air conditioning systems, thermal storage tanks, industrial steam boilers, steam accumulator units, and shared energy storage.

[0071] A system for optimizing the configuration and economic analysis of shared energy storage in industrial parks to meet energy conservation and emission reduction needs, characterized in that it includes:

[0072] The storage module is used to store related model functions;

[0073] The calculation module is used to perform calculations using model functions.

[0074] The energy conversion equipment stored in the storage module includes,

[0075] (1) Central air conditioning

[0076] As an energy conversion device for electric cooling in an integrated energy microgrid, the carbon emission equation and energy consumption equation of central air conditioning are as follows:

[0077]

[0078]

[0079] in, This is the carbon emission factor of electricity from the power grid, expressed in kg CO2 / kWh. This refers to the power consumption of the central air conditioning system over time, measured in kW. This refers to the carbon emissions of central air conditioning, expressed in kg CO2. This is the cooling load of the central air conditioning system over a given time, measured in kW.

[0080] (2) Combined cooling, heating and power system

[0081] The energy conversion equipment included in a combined cooling, heating, and power (CCHP) system includes gas turbines, gas-fired boilers, waste heat boilers, and chillers within the CCHP system. The energy conversions involved include gas-to-electricity, gas-to-heat, heat-to-heat, and heat-to-cooling. Their carbon emission equations and energy consumption equations are as follows:

[0082]

[0083]

[0084]

[0085]

[0086]

[0087]

[0088]

[0089]

[0090] in, This is the carbon emission factor of a gas turbine, expressed in kg CO2 / kWh. It is the gas turbine in time The output power, measured in kW. This refers to the carbon emissions of a gas turbine, expressed in kg CO2. This is the carbon emission coefficient of a gas-fired boiler, expressed in kg CO2 / kWh. Is it a gas-fired boiler in time? The output thermal power, measured in kW. This refers to the carbon emissions of a gas-fired boiler, expressed in kg CO2. This is the carbon emission coefficient of the waste heat boiler, expressed in kg CO2 / kWh. Waste heat boiler in time Heat output, in kW. This refers to the carbon emissions from waste heat boilers, expressed in kgCO2. This is the carbon emission factor of electricity from the power grid, expressed in kg CO2 / kWh. It is the refrigeration machine in time Electricity consumption, in kW. This refers to the carbon emissions of the refrigeration unit, measured in kg CO2. It refers to the power generation efficiency of the gas turbine. It is the gas turbine in time The gas consumption power, measured in kW. Is it a gas-fired boiler in time? Heat output, in kW. It refers to the efficiency of the gas-fired boiler. Is it a gas-fired boiler in time? The gas consumption power, measured in kW. It refers to the efficiency of the waste heat boiler. Waste heat boiler in time Input heat, in kW It is the refrigeration machine in time The cooling load, in kW. It is the energy efficiency ratio of the refrigeration unit;

[0091] (3) Electric steam boiler

[0092] The carbon emission equations and energy consumption equations for electric steam boilers are as follows:

[0093]

[0094]

[0095] in, This is the carbon emission factor of a steam boiler, expressed in kg CO2 / kWh. It is a steam boiler in time The output steam energy, measured in kW. This refers to the carbon emissions of a steam boiler, expressed in kg CO2. for The electrical power consumption of an industrial steam boiler is measured in kW. The heat production efficiency of industrial steam boilers.

[0096] The shared energy storage operation model stored in the storage module includes,

[0097] The operational constraints of shared energy storage are as follows:

[0098]

[0099] in, and The charging and discharging power of shared energy storage within a given time period, measured in kW. and For charge / discharge efficiency, Self-discharge rate , These are the charging and discharging state variables of shared energy storage during different time periods, and the charging state during charging. , During discharge , , and These are the upper and lower limits of energy storage capacity, expressed in kW·h. For time steps, the unit is .

[0100] The energy power balance constraints of the campus shared energy storage optimization configuration method stored in the storage module include,

[0101] (1) Power balance constraints, specifically:

[0102] ,

[0103] in, for The electrical power purchased from the power grid at any given time, measured in kW; for The park's electricity load demand at all times;

[0104] (2) Thermal power balance constraints, specifically:

[0105] ,

[0106] in, for The park's heat load demand at all times;

[0107] (3) Cold energy power balance constraint, specifically:

[0108] ,

[0109] in, for The cooling load demand of the park at any time;

[0110] (4) Steam power balance constraints, specifically:

[0111] ,

[0112] in, for The steam load demand of the industrial park at all times, for The mass flow rate of steam input to the steam accumulator at any given time, expressed in kg / s; Specific enthalpy of the input steam, expressed in kJ / kg; for The mass flow rate of steam output from the steam accumulator at any given time, expressed in kg / s; The specific enthalpy of the output steam, expressed in kJ / kg; For time steps, the unit is .

[0113] This invention proposes a method and system for optimizing the configuration and economic analysis of shared energy storage in industrial parks, taking into account energy conservation and emission reduction requirements. By introducing carbon emission constraints, this invention establishes energy consumption and emission models for various types of equipment in the park, achieving coordinated optimization of the park's energy system between economic efficiency and environmental friendliness. First, at the planning level, it comprehensively considers the shared energy storage capacity configuration and the operating characteristics of park equipment, ensuring the energy storage system has flexible adjustment capabilities under different operating scenarios. Second, at the operational level, it constructs an optimization model aimed at maximizing the overall benefits of the park, encompassing shared energy storage operation constraints, energy power balance constraints, capacity planning constraints, and equipment operation constraints, achieving multi-energy synergy and efficient energy utilization within the park. Finally, it employs a mixed-integer linear programming method to solve the model, taking into account the optimization characteristics of discrete decision-making and continuous control, ensuring the global optimality and feasibility of the model solution. This method not only effectively improves the energy utilization efficiency and economic benefits of the energy storage system in the park but also significantly reduces carbon emissions and energy consumption, providing a scalable technical path for achieving green, low-carbon, and efficient operation in industrial parks. Attached Figure Description

[0114] Figure 1 Physical architecture diagram of shared energy storage park equipment;

[0115] Figure 2 Diagram of shared energy storage operation mode. Detailed Implementation

[0116] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0117] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0118] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0119] This invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of this invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not be construed as limiting the scope of protection of this invention. In actual fabrication, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0120] Furthermore, in the description of this invention, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used solely for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In addition, the terms "first," "second," or "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0121] Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" in this invention should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; similarly, they can refer to mechanical connections, electrical connections, or direct connections, or indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0122] Example 1

[0123] This invention proposes a method for optimizing the configuration and economic analysis of shared energy storage in industrial parks to meet energy conservation and emission reduction needs, including:

[0124] Considering the needs for energy conservation and emission reduction, establish a multi-type equipment model for the park that integrates carbon emission constraints;

[0125] Based on the park's flexible adjustment characteristics and energy-saving goals, a park energy storage optimization configuration and economic analysis model is constructed to maximize the park's overall benefits. This model includes constraints on the operation of the shared energy storage system, energy and power balance constraints, park equipment capacity planning constraints, and equipment operation constraints.

[0126] A mixed-integer linear programming method is used to establish an optimization problem model that can handle both discrete decision variables and continuous control variables, in order to obtain the optimal solution of the objective function.

[0127] Example 2

[0128] The energy conversion equipment for industrial parks described in this invention includes:

[0129] In the optimized configuration of shared energy storage in the park, energy conversion equipment can efficiently convert the electrical energy of new energy sources into a form that can be stored by the energy storage system. When the energy storage releases energy to meet the energy demand of the park, it can convert the stored energy into electrical or thermal energy suitable for the park's equipment, ensuring a stable energy supply.

[0130] (1) Central air conditioning (AC)

[0131] As an energy conversion device for electric cooling in an integrated energy microgrid, the carbon emission equation and energy consumption equation are as follows:

[0132]

[0133]

[0134] in, This is the carbon emission factor of electricity from the power grid, expressed in kg CO2 / kWh. This refers to the power consumption of the central air conditioning system over time, measured in kW. This refers to the carbon emissions of central air conditioning, expressed in kg CO2. This is the cooling load of the central air conditioning system over a given time, measured in kW.

[0135] (2) CCHP system

[0136] The CCHP system includes energy conversion equipment such as GT, GB, Heat Recovery Boiler (HRB), and Refrigeration Machine (RF) in CCHP. The energy conversions involved are gas-to-electricity, gas-to-heat, heat-to-heat, and heat-to-cooling. Their carbon emission equations and energy consumption equations are as follows:

[0137]

[0138]

[0139]

[0140]

[0141]

[0142]

[0143]

[0144]

[0145] in, This is the carbon emission factor of a gas turbine, expressed in kg CO2 / kWh. It is the gas turbine in time The output power, measured in kW. This refers to the carbon emissions of a gas turbine, expressed in kg CO2. This is the carbon emission coefficient of a gas-fired boiler, expressed in kg CO2 / kWh. Is it a gas-fired boiler in time? The output thermal power, measured in kW. This refers to the carbon emissions of a gas-fired boiler, expressed in kg CO2. This is the carbon emission coefficient of the waste heat boiler, expressed in kg CO2 / kWh. Waste heat boiler in time Heat output, in kW. This refers to the carbon emissions from waste heat boilers, expressed in kgCO2. This is the carbon emission factor of electricity from the power grid, expressed in kg CO2 / kWh. It is the refrigeration machine in time Electricity consumption, in kW. This refers to the carbon emissions of the refrigeration unit, measured in kg CO2. It refers to the power generation efficiency of the gas turbine. It is the gas turbine in time The gas consumption power, measured in kW. Is it a gas-fired boiler in time? Heat output, in kW. It refers to the efficiency of the gas-fired boiler. Is it a gas-fired boiler in time? The gas consumption power, measured in kW. It refers to the efficiency of the waste heat boiler. Waste heat boiler in time Input heat, in kW It is the refrigeration machine in time The cooling load, in kW. It is the energy efficiency ratio of the refrigeration unit.

[0146] (3) Electric steam boiler

[0147] The carbon emission equations and energy consumption equations for electric steam boilers are as follows:

[0148]

[0149]

[0150] in, This is the carbon emission factor of a steam boiler, expressed in kg CO2 / kWh. It is a steam boiler in time The output steam energy, measured in kW. This refers to the carbon emissions of a steam boiler, expressed in kg CO2. for The electrical power consumption of an industrial steam boiler is measured in kW. The heat production efficiency of industrial steam boilers.

[0151] Example 3

[0152] The objective function of the shared energy storage model oriented towards energy conservation and emission reduction needs described in this invention includes:

[0153]

[0154] The total investment cost is:

[0155]

[0156] The power interaction cost is:

[0157]

[0158] The cost of purchasing gas is:

[0159]

[0160] Maintenance costs are:

[0161]

[0162] The carbon emission cost is:

[0163]

[0164] The cost of shared energy storage services is:

[0165]

[0166] in, The total investment cost, The discount rate for the equipment. The design life of the equipment. For the first The unit investment planning cost of this type of equipment For the first The planned installation capacity of this type of equipment This refers to the number of equipment types in an integrated energy system. For electricity interaction costs, and They are respectively The electricity sales price and purchase price from the power grid in the industrial park at all times. for The power exchange between the industrial park and the upstream power grid at any given time, in kW. and They are respectively The electricity sales price and purchase price of the shared energy storage system in the park are subject to change. The power exchange between the park and the shared energy storage system at any given time is expressed in kW. The cost of gas purchase includes the total price of natural gas used in gas turbines (GT) and gas boilers (GB). The power supply capacity for the park's energy flow diagram and Combined Cooling Heating Power (CCHP) system, in kW. The conversion efficiency of gas-to-electricity conversion in GT. This refers to the heating power specified in GB standards, in kW. GB represents the conversion efficiency of gas-to-heat conversion. The running cycle is 1 hour. The lower calorific value of natural gas is the heat released when 1 cubic meter of natural gas is completely burned. To maintain costs, , , , , The unit operating power maintenance costs are respectively for photovoltaic power generation units, shared energy storage, industrial steam boilers, steam accumulators, and central air conditioning. and They are respectively The charging and discharging power of the energy storage is shared at all times, in kW; , and respectively, photovoltaic power generation units, industrial steam boilers and air conditioning units in Operating power at any given time, in kW; and They represent The flow rate of steam entering and exiting the steam accumulator at any given time, T=24h; For carbon emission costs, Total carbon emissions, in tons. The price is for carbon, expressed in yuan per ton. To share the cost of energy storage services, Service fee is per unit, expressed in yuan / kW. The total rental fee for the park; Represents the total cost. This refers to the entire lifecycle of the integrated energy system, i.e., the design life of the equipment.

[0167] Example 4

[0168] The shared energy storage operation model described in this invention includes,

[0169] The park adopts a shared energy storage model, connecting with external shared energy storage systems. This not only significantly improves economic benefits but also simultaneously achieves energy conservation and emission reduction goals. The operational constraints of the shared energy storage are as follows:

[0170]

[0171] in, and The charging and discharging power of shared energy storage within a given time period, measured in kW. and For charge / discharge efficiency, Self-discharge rate , These are the charging and discharging state variables of shared energy storage during different time periods, and the charging state during charging. , During discharge , , and These are the upper and lower limits of energy storage capacity, expressed in kW·h. For time steps, the unit is .

[0172] By adopting a shared energy storage model, energy storage resources are no longer limited to a single user but are made available to multiple users. Different users can purchase corresponding services according to their actual needs. With the help of an intelligent management platform and flexible trading mechanisms, energy storage resources can be optimally allocated across the entire network. This model effectively improves energy utilization efficiency and enhances the operational quality of the power system.

[0173] Example 5

[0174] The energy power balance constraints of the shared energy storage optimization configuration method for industrial parks described in this invention include:

[0175] (1) The power balance constraint is:

[0176]

[0177] in, for The electrical power purchased from the power grid at any given time, measured in kW; for The park's electricity load demand at all times.

[0178] (2) The thermal power balance constraint is:

[0179]

[0180] in, for The park's heat load demand at all times.

[0181] (3) The cold energy power balance constraint is:

[0182]

[0183] in, for The park's cooling load demand at all times.

[0184] (4) The steam power balance constraint is:

[0185]

[0186] in, for The steam load demand of the industrial park at all times, for The mass flow rate of steam input to the steam accumulator at any given time, expressed in kg / s; Specific enthalpy of the input steam, expressed in kJ / kg; for The mass flow rate of steam output from the steam accumulator at any given time, expressed in kg / s; The specific enthalpy of the output steam, expressed in kJ / kg; For time steps, the unit is .

[0187] Example 6

[0188] The installation capacity planning constraints of the shared energy storage optimization configuration method for industrial parks described in this invention include:

[0189]

[0190] in, , , , , , , , , , These include the planned installation capacity of photovoltaic power generation units, gas-fired boilers, gas turbines, waste heat boilers, chillers, central air conditioning systems, thermal storage tanks, industrial steam boilers, steam accumulator units, and shared energy storage. , , , , , , , , , These are the planned installation capacity limits for photovoltaic generator sets, gas-fired boilers, gas turbines, waste heat boilers, chillers, central air conditioning units, thermal storage tanks, industrial steam boilers, steam accumulator units, and shared energy storage.

[0191] Example 7

[0192] The upper and lower limit constraints for the operation of various devices within the park as described in this invention include:

[0193]

[0194] in, , , , , , , , , , These include the original capacity of photovoltaic generator sets, gas-fired boilers, gas turbines, waste heat boilers, refrigeration units, central air conditioning systems, thermal storage tanks, industrial steam boilers, steam accumulator units, and shared energy storage.

Claims

1. A method for optimizing the configuration and economic analysis of shared energy storage in industrial parks to meet energy conservation and emission reduction needs, characterized in that, include: Considering the needs for energy conservation and emission reduction, establish a multi-type equipment model for the park that integrates carbon emission constraints; Based on the park's flexible adjustment characteristics and energy-saving goals, a park energy storage optimization configuration and economic analysis model is constructed to maximize the park's comprehensive benefits, including shared energy storage system operation constraints, energy and power balance constraints, park equipment capacity planning constraints, and equipment operation constraints. A mixed-integer linear programming method is used to establish an optimization problem model that can handle both discrete decision variables and continuous control variables, in order to obtain the optimal solution of the objective function.

2. The method for optimizing the configuration and economic analysis of shared energy storage in industrial parks to meet energy conservation and emission reduction needs as described in claim 1, characterized in that: The energy conversion equipment in the park includes, (1) Central air conditioning As an energy conversion device for electric cooling in an integrated energy microgrid, the carbon emission equation and energy consumption equation of central air conditioning are as follows: ; ; in, This is the carbon emission factor of electricity from the power grid, expressed in kg CO2 / kWh. This refers to the power consumption of the central air conditioning system over time, measured in kW. This refers to the carbon emissions of central air conditioning, expressed in kg CO2. This is the cooling load of the central air conditioning system over a given time, measured in kW.

3. (2) Combined cooling and heating system The energy conversion equipment included in a combined cooling, heating, and power (CCHP) system includes gas turbines, gas-fired boilers, waste heat boilers, and chillers within the CCHP system. The energy conversions involved include gas-to-electricity, gas-to-heat, heat-to-heat, and heat-to-cooling. Their carbon emission equations and energy consumption equations are as follows: ; ; ; ; ; ; ; ; in, This is the carbon emission factor of a gas turbine, expressed in kg CO2 / kWh. It is the gas turbine in time The output power, measured in kW. This refers to the carbon emissions of a gas turbine, expressed in kg CO2. This is the carbon emission coefficient of a gas-fired boiler, expressed in kg CO2 / kWh. Is it a gas-fired boiler in time? The output thermal power, measured in kW. This refers to the carbon emissions of a gas-fired boiler, expressed in kg CO2. This is the carbon emission coefficient of the waste heat boiler, expressed in kg CO2 / kWh. Waste heat boiler in time Heat output, in kW. This refers to the carbon emissions from waste heat boilers, expressed in kg CO2. This is the carbon emission factor of electricity from the power grid, expressed in kg CO2 / kWh. It is the refrigeration machine in time Electricity consumption, in kW. This refers to the carbon emissions of the refrigeration unit, measured in kg CO2. It refers to the power generation efficiency of the gas turbine. It is the gas turbine in time The gas consumption power, measured in kW. Is it a gas-fired boiler in time? Heat output, in kW. It refers to the efficiency of the gas-fired boiler. Is it a gas-fired boiler in time? The gas consumption power, measured in kW. It refers to the efficiency of the waste heat boiler. Waste heat boiler in time Input heat, in kW It is the refrigeration machine in time The cooling load, in kW. It is the energy efficiency ratio of the refrigeration unit; (3) Electric steam boiler The carbon emission equations and energy consumption equations for electric steam boilers are as follows: ; ; in, This is the carbon emission factor of a steam boiler, expressed in kg CO2 / kWh. It is a steam boiler in time The output steam energy, measured in kW. This refers to the carbon emissions of a steam boiler, expressed in kg CO2. for The electrical power consumption of an industrial steam boiler is measured in kW. The heat production efficiency of industrial steam boilers.

4. The method for optimizing the configuration and economic analysis of shared energy storage in industrial parks to meet energy conservation and emission reduction needs as described in claim 1, characterized in that: The objective function of the shared energy storage model, which addresses the needs of energy conservation and emission reduction, includes: ， The total investment cost C1 is: ， The cost of C2 power interaction is: ， The gas purchase cost C3 is: ， Maintenance cost C4 is: ， The carbon emission cost C5 is: ， The cost of shared energy storage service C6 is: ， in, The total investment cost, The discount rate for the equipment. The design life of the equipment. For the first The unit investment planning cost of this type of equipment For the first The planned installation capacity of this type of equipment This refers to the number of equipment types in an integrated energy system. For electricity interaction costs, and They are respectively The electricity sales price and purchase price from the power grid in the industrial park at all times. for The power exchange between the industrial park and the upstream power grid at any given time, in kW. and They are respectively The electricity sales price and purchase price for the shared energy storage system in the park are as follows: The power exchange between the park and the shared energy storage system at any given time is expressed in kW. The cost of gas purchase includes the total price of natural gas used in gas turbines and gas boilers. The power supply capacity of the park's energy flow diagram and combined cooling, heating and power system is shown in kW. The conversion efficiency of gas-to-electricity conversion in GT. This refers to the heating power specified in GB standards, in kW. GB represents the conversion efficiency of gas-to-heat conversion. The running cycle is 1 hour. The lower calorific value of natural gas is the heat released when 1 cubic meter of natural gas is completely burned. To maintain costs, , , , , The maintenance costs per unit operating power of photovoltaic power generators, shared energy storage, industrial steam boilers, steam accumulators, and central air conditioning systems are respectively. and They are respectively The charging and discharging power of the energy storage is shared at all times, in kW; , and respectively, photovoltaic power generation units, industrial steam boilers and air conditioning units in Operating power at any given time, in kW; and They represent The flow rate of steam entering and exiting the steam accumulator at any given time, T=24h; For carbon emission costs, Total carbon emissions, in tons. The price is for carbon, expressed in yuan per ton. To share the cost of energy storage services, Service fee is per unit, expressed in yuan / kW. The total rental fee for the park; Represents the total cost. This refers to the entire lifecycle of the integrated energy system, i.e., the design life of the equipment.

5. The method for optimizing the configuration and economic analysis of shared energy storage in industrial parks to meet energy conservation and emission reduction needs as described in claim 3, characterized in that: The shared energy storage operation model includes, The operational constraints of shared energy storage are as follows: ; in, and The charging and discharging power of shared energy storage within a given time period, measured in kW. and For charge / discharge efficiency, Self-discharge rate , These are the charging and discharging state variables of shared energy storage during different time periods, and the charging state during charging. , During discharge , , and These are the upper and lower limits of energy storage capacity, expressed in kW·h. For time step, the unit is .

6. The method for optimizing the configuration and economic analysis of shared energy storage in industrial parks to meet energy conservation and emission reduction needs as described in claim 4, characterized in that: The energy power balance constraints of the optimized configuration method for shared energy storage in the park include: (1) Power balance constraints, specifically: ， in, for The electrical power purchased from the power grid at any given time, measured in kW; for The park's electricity load demand at all times; (2) Thermal power balance constraints, specifically: ， in, for The park's heat load demand at all times; (3) Cold energy power balance constraint, specifically: ， in, for The cooling load demand of the park at any time; (4) Steam power balance constraints, specifically: ， in, for The steam load demand of the industrial park at all times, for The mass flow rate of steam input to the steam accumulator at any given time, expressed in kg / s; Specific enthalpy of the input steam, expressed in kJ / kg; for The mass flow rate of steam output from the steam accumulator at any given time, expressed in kg / s; The specific enthalpy of the output steam, expressed in kJ / kg; For time step, the unit is .

7. The method for optimizing the configuration and economic analysis of shared energy storage in industrial parks to meet energy conservation and emission reduction needs as described in claim 5, characterized in that: The installation capacity planning constraints of the aforementioned park-wide shared energy storage optimization configuration method include, ; in, , , , , , , , , , These include the planned installation capacity of photovoltaic power generation units, gas-fired boilers, gas turbines, waste heat boilers, chillers, central air conditioning systems, thermal storage tanks, industrial steam boilers, steam accumulator units, and shared energy storage. , , , , , , , , , These are the planned installation capacity limits for photovoltaic generator sets, gas-fired boilers, gas turbines, waste heat boilers, chillers, central air conditioning units, thermal storage tanks, industrial steam boilers, steam accumulator units, and shared energy storage.

8. The method for optimizing the configuration and economic analysis of shared energy storage in industrial parks to meet energy conservation and emission reduction needs as described in claim 6, characterized in that: The upper and lower limit constraints for the operation of each device within the park include: ， in, , , , , , , , , , These include the original capacity of photovoltaic generator sets, gas-fired boilers, gas turbines, waste heat boilers, refrigeration units, central air conditioning systems, thermal storage tanks, industrial steam boilers, steam accumulator units, and shared energy storage.

9. A system for optimizing the configuration and economic analysis of shared energy storage in industrial parks to meet energy conservation and emission reduction needs, characterized in that: include: The storage module is used to store related model functions; The calculation module is used to perform calculations using model functions.

10. The system for optimized configuration and economic analysis of shared energy storage in industrial parks, oriented towards energy conservation and emission reduction needs, as described in claim 8, is characterized in that... The energy conversion equipment stored in the storage module includes, (1) Central air conditioning As an energy conversion device for electric cooling in an integrated energy microgrid, the carbon emission equation and energy consumption equation of central air conditioning are as follows: ; ; in, This is the carbon emission factor of electricity from the power grid, expressed in kg CO2 / kWh. This refers to the power consumption of the central air conditioning system over time, measured in kW. This refers to the carbon emissions of central air conditioning, expressed in kg CO2. This is the cooling load of the central air conditioning system over a given time, measured in kW.

11. (2) Combined cooling and heating system The energy conversion equipment included in a combined cooling, heating, and power (CCHP) system includes gas turbines, gas-fired boilers, waste heat boilers, and chillers within the CCHP system. The energy conversions involved include gas-to-electricity, gas-to-heat, heat-to-heat, and heat-to-cooling. Their carbon emission equations and energy consumption equations are as follows: ; ; ; ; ; ; ; ; in, This is the carbon emission factor of a gas turbine, expressed in kg CO2 / kWh. It is the gas turbine in time The output power, measured in kW. This refers to the carbon emissions of a gas turbine, expressed in kg CO2. This is the carbon emission coefficient of a gas-fired boiler, expressed in kg CO2 / kWh. Is it a gas-fired boiler in time? The output thermal power, measured in kW. This refers to the carbon emissions of a gas-fired boiler, expressed in kg CO2. This is the carbon emission coefficient of the waste heat boiler, expressed in kg CO2 / kWh. Waste heat boiler in time Heat output, in kW. This refers to the carbon emissions from waste heat boilers, expressed in kg CO2. This is the carbon emission factor of electricity from the power grid, expressed in kg CO2 / kWh. It is the refrigeration machine in time Electricity consumption, in kW. This refers to the carbon emissions of the refrigeration unit, measured in kg CO2. It refers to the power generation efficiency of the gas turbine. It is the gas turbine in time The gas consumption power, measured in kW. Is it a gas-fired boiler in time? Heat output, in kW. It refers to the efficiency of the gas-fired boiler. Is it a gas-fired boiler in time? The gas consumption power, measured in kW. It refers to the efficiency of the waste heat boiler. Waste heat boiler in time Input heat, in kW It is the refrigeration machine in time The cooling load, in kW. It is the energy efficiency ratio of the refrigeration unit; (3) Electric steam boiler The carbon emission equations and energy consumption equations for electric steam boilers are as follows: ; ; in, This is the carbon emission factor of a steam boiler, expressed in kg CO2 / kWh. It is a steam boiler in time The output steam energy, measured in kW. This refers to the carbon emissions of a steam boiler, expressed in kg CO2. for The electrical power consumption of an industrial steam boiler is measured in kW. The heat production efficiency of industrial steam boilers.

12. The system for optimized configuration and economic analysis of shared energy storage in industrial parks, oriented towards energy conservation and emission reduction needs, as described in claim 8, is characterized in that... The shared energy storage operation model stored in the storage module includes, The operational constraints of shared energy storage are as follows: ; in, and The charging and discharging power of shared energy storage within a given time period, measured in kW. and For charge / discharge efficiency, Self-discharge rate , These are the charging and discharging state variables of shared energy storage during different time periods, and the charging state during charging. , During discharge , , and These are the upper and lower limits of energy storage capacity, expressed in kW·h. For time step, the unit is .

13. The system for optimized configuration and economic analysis of shared energy storage in industrial parks, oriented towards energy conservation and emission reduction needs, as described in claim 8, is characterized in that... The energy power balance constraints of the campus shared energy storage optimization configuration method stored in the storage module include, (1) Power balance constraints, specifically: ， in, for The electrical power purchased from the power grid at any given time, measured in kW; for The park's electricity load demand at all times; (2) Thermal power balance constraints, specifically: ， in, for The park's heat load demand at all times; (3) Cold energy power balance constraint, specifically: ， in, for The cooling load demand of the park at any time; (4) Steam power balance constraints, specifically: ， in, for The steam load demand of the industrial park at all times, for The mass flow rate of steam input to the steam accumulator at any given time, expressed in kg / s; Specific enthalpy of the input steam, expressed in kJ / kg; for The mass flow rate of steam output from the steam accumulator at any given time, expressed in kg / s; The specific enthalpy of the output steam, expressed in kJ / kg; For time step, the unit is .

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