A method and system for determining installed capacity of a comprehensive energy system

Abstract

The present invention provides a method and system for determining the installed capacity of an integrated energy system, comprising: determining two types of parameters in a pre-constructed input-output relationship and the construction requirements of the integrated energy system, and obtaining the relationship between the remaining type of parameters and the system input-output ratio; determining the installed capacity of each energy device in the integrated energy system based on the relationship between the remaining type of parameters and the system input-output ratio; wherein the input-output relationship is constructed by the demand for each energy product in the integrated energy system and the mutual conversion efficiency between the multiple energy conversion devices invested, and the input-output relationship includes three types of parameters, namely energy price, equipment energy efficiency and system configuration. According to the key objects to be analyzed, a part of the parameters can be determined, and the relationship between the other part of the parameters and the system input-output ratio can be analyzed for designing the installed capacity of the integrated energy system.

Description

Technical Field

[0001] The present invention relates to an integrated energy system, and in particular to a method and system for determining the installed capacity of an integrated energy system. Background Art

[0002] The increasing prominence of energy crises and environmental issues has prompted countries around the world to actively invest in the development and utilization of new renewable energy sources. Demand-side integrated energy systems, which consider both the on-site utilization of local renewable energy and the mixed use of renewable and fossil fuels, are attracting increasing attention. Regional energy projects, primarily based on combined heat and power (CHP) with renewable energy as a supplement, are on the rise, and community secondary energy markets, such as neighborhood energy cooperatives, are emerging. The demand-side integrated energy service market encompasses a variety of energy production and consumption technologies, corresponding to different equipment and systems.

[0003] Existing research on integrated energy system optimization modeling often focuses on economic efficiency (or one of the objectives), using numerical model calculations to determine the optimal system configuration for the integrated energy system. While this approach plays an important role in supporting integrated energy system design, the component numerical optimization model can only calculate the optimal design for a single scenario and cannot explain the relationship between economic efficiency and system configuration parameters. For example, when a factor changes, the model needs to be re-calculated, which is inefficient and inconvenient for use in preliminary solution determination. Therefore, how to efficiently determine the installed capacity of an integrated energy system requires further research. Summary of the Invention

[0004] The purpose of the present invention is to overcome the defect of low efficiency in configuring the parameters of the integrated energy system in the prior art, and to propose a scheduling method for the integrated energy system, which provides a convenient method for screening and determining the integrated energy system scheme.

[0005] The technical solution provided by the present invention is: a method for determining the installed capacity of a comprehensive energy system, comprising:

[0006] Based on the pre-established input-output relationship and the construction requirements of the integrated energy system, two types of parameters in the input-output relationship are determined, and the relationship between the remaining type of parameters and the system input-output ratio is obtained;

[0007] Determining the installed capacity of each energy device in the integrated energy system based on the relationship between the remaining parameters and the system input-output ratio;

[0008] The input-output relationship is constructed by the mutual conversion efficiency between the demand for various energy products in the integrated energy system and the various energy conversion equipment invested, and the input-output relationship includes three types of parameters, namely energy price, equipment energy efficiency and system configuration.

[0009] Preferably, the construction of the input-output relationship includes:

[0010] Construct an input-output relationship based on the demand for various energy products in the integrated energy system and the mutual conversion efficiency between the various energy conversion devices used;

[0011] The input-output relationship is dimensionally non-quantized to obtain a dimensionless input-output relationship.

[0012] Preferably, the mutual conversion efficiency between the demand for each energy product in the integrated energy system and the various energy conversion devices used includes:

[0013] Obtain various energy resources input and energy products output;

[0014] Draw the conversion process of various energy resources input through energy conversion equipment to produce various energy products;

[0015] Determining the mutual conversion efficiency between the demand for various energy products in the integrated energy system and the various energy conversion devices used based on the conversion process and the performance parameters of the energy conversion devices used in the conversion process;

[0016] The energy products include: heating demand, cooling demand and fixed power demand, and the fixed power demand includes the power load of electronic equipment, electric machinery and elevators;

[0017] The energy sources include: electrical energy and fuel.

[0018] Preferably, the input-output relationship is as shown below:

[0019]

[0020] Where R total : The input-output return of the entire integrated energy system within the set operating time; D c : Cooling demand within the set operating time; P c : average price of cold energy; D h : Set the heat demand during the operation time; P h : average price of thermal energy; D e,0 : Set the fixed power demand during the operation time; P e : average price of electricity; F in : The amount of fuel consumed by the integrated energy system during the set operating time; P f : average price of fuel; E in : The amount of electricity consumed by the integrated energy system during the set operating time.

[0021] Preferably, the dimensionless relationship between input and output is as shown below:

[0022]

[0023] Where, y: the user's cold product ratio; z: the user's hot product ratio; A: the first intermediate parameter; x: the ratio of the heat produced by the boiler to the user's total heat demand; B: the second intermediate parameter;

[0024] Among them: The first intermediate parameter A is calculated as follows:

[0025]

[0026] Where: η boil : boiler heat generation efficiency; η CHP,h : Thermal efficiency of combined heat and power equipment; COP c : efficiency of thermal cooling; v: ratio of heat produced by electric heating equipment to the total heat demand of users; t: ratio of cooling capacity produced by electric cooling equipment to the total cooling capacity demand of users;

[0027] The first intermediate parameter B is calculated as follows:

[0028]

[0029] Where: COP h : Efficiency of Electric Heating; EER c : efficiency of electric cooling; η CHP,e : Power generation efficiency of cogeneration equipment.

[0030] Preferably, determining two types of parameters in the input-output relationship and obtaining the relationship between the remaining type of parameters and the system input-output ratio includes:

[0031] According to the construction requirements of the integrated energy system, two types of parameters in the input-output relationship are determined;

[0032] The remaining parameters are used as independent variables to conduct partial derivative analysis to determine the relationship between the remaining parameters and the system input-output ratio.

[0033] Preferably, the method of performing partial derivative analysis on the remaining parameters as independent variables to determine the relationship between the remaining parameters and the system input-output ratio further includes:

[0034] Based on the relationship between the remaining first-category parameters and the system input-output ratio, a relationship diagram between the remaining first-category parameters and the system input-output ratio is drawn.

[0035] Preferably, determining two types of parameters in the input-output relationship and obtaining the relationship between the remaining type of parameters and the system input-output ratio specifically includes:

[0036] When the system configuration variables and energy efficiency parameters are fixed, the relationship between energy price and input-output ratio is obtained as shown in the following formula:

[0037]

[0038] Preferably, the system configuration includes: according to the ratio of heat produced by the boiler to the total heat demand of the user, the ratio of heat produced by the electric heating equipment to the total heat demand of the user, and the ratio of cooling produced by the electric refrigeration equipment to the total cooling demand of the user;

[0039] The energy prices include: the average price of cooling energy, the average price of heating energy, the average price of electricity and the average price of fuel;

[0040] The equipment energy efficiency includes: the efficiency of thermal cooling, the efficiency of electric heating, the efficiency of electric cooling, the electricity production efficiency of cogeneration equipment, the heat production efficiency of boilers and the heat production efficiency of cogeneration equipment.

[0041] Based on the same inventive concept, the present invention also provides a system for determining the installed capacity of an integrated energy system, comprising:

[0042] A first determination module is configured to determine two types of parameters in a pre-established input-output relationship and construction requirements of an integrated energy system, and obtain a relationship between the remaining type of parameter and the system input-output ratio;

[0043] A second determining module is configured to determine the installed capacity of each energy device in the integrated energy system based on the relationship between the remaining parameters and the system input-output ratio;

[0044] The input-output relationship is constructed by the mutual conversion efficiency between the demand for various energy products in the integrated energy system and the various energy conversion equipment invested, and the input-output relationship includes three types of parameters, namely energy price, equipment energy efficiency and system configuration.

[0045] Preferably, the system further comprises: a construction module for constructing an input-output relationship;

[0046] The building blocks include:

[0047] Construct a submodule for constructing an input-output relationship based on the demand for various energy products in the integrated energy system and the mutual conversion efficiency between the various energy conversion devices invested;

[0048] The processing submodule is used to perform dimensionless processing on the input-output relationship to obtain a dimensionless input-output relationship.

[0049] Compared with the prior art, the present invention has the following beneficial effects:

[0050] The technical solution provided by the present invention determines two types of parameters in the input-output relationship based on a pre-constructed input-output relationship and the construction requirements of the integrated energy system, and obtains the relationship between the remaining type of parameters and the system input-output ratio; based on the relationship between the remaining type of parameters and the system input-output ratio, determines the installed capacity of each energy device in the integrated energy system; wherein the input-output relationship is constructed by the demand for each energy product in the integrated energy system and the mutual conversion efficiency between the multiple energy conversion devices invested, and the input-output relationship includes three types of parameters, namely energy price, equipment energy efficiency and system configuration. According to the key object to be analyzed, a part of the parameters can be determined, and the relationship between the other part of the parameters and the system input-output ratio can be analyzed, which are used to design the configuration variables of each device in the integrated energy system, select equipment performance parameters and formulate various energy prices, and at the same time, can efficiently determine the installed capacity of the integrated energy system.

[0051] The technical solution provided by the present invention does not require re-modeling and calculation when a certain factor changes, thereby improving calculation efficiency and being applicable to the determination of preliminary solutions.

[0052] The technical solution provided by the present invention is based on the functional relationship between the input-output ratio of the integrated energy system and relevant influencing factors. Through partial differential analysis, the changing trend and change amount of the system input-output ratio when the influencing factors change are obtained, and then the optimal design parameters of the integrated energy system are determined, which can simplify the optimization design workload and improve design efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 This is a flow chart of a method for determining the installed capacity of a comprehensive energy system according to the present invention;

[0054] Figure 2 This is a schematic diagram of energy flow in the integrated energy system of the present invention;

[0055] Figure 3 Schematic diagram of the changing relationship between energy price and input-output ratio in an embodiment of the present invention. DETAILED DESCRIPTION

[0056] In order to better understand the present invention, the present invention is further described below with reference to the accompanying drawings and examples.

[0057] Example 1:

[0058] The emergence of integrated energy system scheduling is to improve the utilization level of clean energy. When conducting integrated energy system scheduling, the most effective means to improve the utilization level of clean energy is to use optimal economic benefits as a lever, based on the input-output balance of the power system, and taking into account the safe operation of the power system to formulate a reasonable installed capacity, so as to realize an energy supply plan with the purpose of maximizing the utilization of clean energy.

[0059] like Figure 1 As shown in the figure, the method for determining the installed capacity includes:

[0060] Step S1: Based on the pre-established input-output relationship and the construction requirements of the integrated energy system, two types of parameters in the input-output relationship are determined, and the relationship between the remaining type of parameters and the system input-output ratio is obtained;

[0061] Step S2: determining the installed capacity of each energy device in the integrated energy system based on the relationship between the remaining parameters and the system input-output ratio;

[0062] The input-output relationship is constructed by the mutual conversion efficiency between the demand for various energy products in the integrated energy system and the various energy conversion equipment invested, and the input-output relationship includes three types of parameters, namely energy price, equipment energy efficiency and system configuration.

[0063] The construction of input-output relationship includes:

[0064] 1. Drawing the energy flow diagram of a multi-energy complementary integrated energy system includes the following steps:

[0065] 1) Based on the preliminary design plan, identify the various energy resources available and the energy products to be produced;

[0066] 2) If Figure 2 As shown, draw an energy flow path diagram including various energy resources, energy conversion equipment and cold and heat power products, where F boil is the amount of fuel used for the boiler, in MJ; F CHP is the amount of fuel used for cogeneration, in MJ; η boil ,η CHP,h are the heat generation efficiencies of the boiler and CHP equipment respectively; η CHP,e is the efficiency of electricity generation of CHP equipment; B fuel is the amount of local biomass energy resources used, in MJ; E in It is the amount of electricity consumed by the integrated energy system during the set operating time, in MJ; S e 、W e are local solar and wind power generation, both in MJ; R h is the local solar heating capacity in MJ; E is the total electricity demand in MJ; Eh 、E c , E0 are for heating, cooling and fixed power demand respectively, both in MJ; H s 、C s 、E s They are heat storage, cold storage, and power storage, all in MJ; COP h , COP c 、EER c are the efficiencies of electric heating, thermal cooling, and electric cooling, respectively; η h,s ,η c,s ,η e,s They are the efficiency of heat storage, cold storage and electricity storage systems respectively; fixed power demand refers to the power demand not used for air conditioning, cooling and heating, mainly referring to the power loads such as electronic equipment, electric machinery, elevators, etc.

[0067] 3) Based on the preliminary design plan and equipment performance parameters, determine the conversion efficiency of various energy conversion processes in each link within the system, such as the COP of the heat pump, the thermal efficiency and power generation efficiency η of the boiler or cogeneration unit, the energy efficiency rating (EER) of the chiller, and other equipment conversion efficiencies. Based on the configuration data of the capacity of various energy equipment in the design plan, determine the energy product of each energy conversion process.

[0068] 2. Based on the prices of energy resources and heating, cooling and power products, establish the input-output relationship between energy resources and energy products as shown in the following formula:

[0069]

[0070] Where R total : The input-output return of the entire integrated energy system within the set operating time; D c : Cooling demand within the set operating time; P c : average price of cold energy; D h : Set the heat demand during the operation time; P h : average price of thermal energy; D e,0 : Set the fixed power demand during the operation time; P e : average price of electricity; F in : The amount of fuel such as gas and oil consumed by the integrated energy system during the set operating time, in MJ; P f : average price of fuel; E in : The amount of electricity consumed by the integrated energy system during the set operating time, in MJ; the unit of demand is MJ; the unit of average price is RMB / MJ.

[0071] 3. Dimensionless transformation of the input-output relationship of the integrated energy system, including:

[0072] make

[0073]

[0074]

[0075] The input-output relationship can be simplified as:

[0076]

[0077] in

[0078]

[0079] At this time, the input-output relationship of the integrated energy system is transformed into a dimensionless relationship that is independent of the size of the system. The system input and output are only affected by the system configuration variables t, v, x and the performance COP of the energy conversion equipment. h 、EER c , η and other energy efficiency parameters and energy price P c 、P h 、P e and P f And other parameters.

[0080] Among them, t is the ratio of the cooling capacity produced by the electric refrigeration equipment to the total cooling capacity demand of the users; v is the ratio of the heat produced by the electric heating equipment to the total heat demand of the users; x is the ratio of the heat produced by the boiler to the total heat demand of the users.

[0081] Step S2: Based on the relationship between the remaining parameters and the system input-output ratio, the installed capacity of each energy device in the integrated energy system is determined, including:

[0082] 1. Calculate the relationship between the system input-output ratio and various parameters through partial derivative analysis; based on the relationship between the input-output ratio and various parameters, draw the relationship diagram between each type of parameter and the system input-output ratio.

[0083] This embodiment takes the given system configuration and energy efficiency parameters as an example, and calculates the partial derivative to obtain R total The relationship with energy prices is shown in the following formula:

[0084]

[0085]

[0086]

[0087]

[0088] When the energy efficiency of energy conversion equipment and the system configuration plan are fixed according to the equipment performance level, the relationship between various energy prices and system input-output can be obtained. That is, when two of the three categories of energy price, equipment energy efficiency and system configuration parameters are fixed, the relationship between one of the parameters and the system input-output ratio can be obtained.

[0089] like Figure 3 As shown in the figure, the relationship between system input and output and energy price is given when the system configuration and equipment energy efficiency are fixed. When the average price of cooling energy, heating energy, electricity and fuel fluctuate, the impact on input and output is shown. The horizontal axis ΔP refers to the average price of cooling energy, heating energy, electricity or gas. For example, when the average price of cooling energy P c When the input-output ratio R total The value is between 1.9-2.

[0090] 2. Based on the relationship between each parameter variable and the system input-output ratio, determine the values ​​of each parameter when the system input-output ratio is optimal. The installed capacity of the system can be further determined through the parameter values.

[0091] In this embodiment, according to the relationship between the input-output ratio and energy prices, when the prices of various energy sources fluctuate based on the benchmark prices, the input-output ratio changes. Figure 3 It can be used to assist in determining the pricing of various energy sources in the system.

[0092] The embodiment provided in this embodiment can determine a part of the parameters according to the key objects to be analyzed, and analyze the relationship between the other parameters and the input-output ratio of the system. This method can be used to design the capacity configuration of various equipment in the integrated energy system, the selection of equipment performance parameters, the formulation of various energy prices, etc., which is of great significance for simplifying the analysis and quickly determining the optimal preliminary design scheme.

[0093] The present invention is based on the functional relationship between the input-output ratio of the integrated energy system and relevant influencing factors. Through partial differential analysis, the changing trend and amount of the system input-output ratio when the influencing factors change are obtained, and then the optimal design parameters of the integrated energy system when the economy is optimal are determined. This can simplify the optimization design workload and improve design efficiency.

[0094] Example 2:

[0095] Based on the same inventive concept, the present invention also provides a system for determining the installed capacity of a comprehensive energy system, comprising:

[0096] A first determination module is configured to determine two types of parameters in a pre-established input-output relationship and construction requirements of an integrated energy system, and obtain a relationship between the remaining type of parameter and the system input-output ratio;

[0097] A second determining module is configured to determine the installed capacity of each energy device in the integrated energy system based on the relationship between the remaining parameters and the system input-output ratio;

[0098] The input-output relationship is constructed by the mutual conversion efficiency between the demand for various energy products in the integrated energy system and the various energy conversion equipment invested, and the input-output relationship includes three types of parameters, namely energy price, equipment energy efficiency and system configuration.

[0099] In an embodiment, the system further comprises: a construction module for constructing an input-output relationship;

[0100] The building blocks include:

[0101] Construct a submodule for constructing an input-output relationship based on the demand for various energy products in the integrated energy system and the mutual conversion efficiency between the various energy conversion devices invested;

[0102] The processing submodule is used to perform dimensionless processing on the input-output relationship to obtain a dimensionless input-output relationship.

[0103] In the embodiment, the construction submodule includes:

[0104] Acquisition unit, used to obtain various input energy resources and output energy products;

[0105] A drawing unit is used to draw the conversion process of various energy resources input through energy conversion equipment to produce various energy products;

[0106] a determination unit, configured to determine, based on the conversion process and performance parameters of the energy conversion equipment during the conversion process, the demand for each energy product in the integrated energy system and the mutual conversion efficiency between the multiple energy conversion equipment used;

[0107] The energy products include: heating demand, cooling demand and fixed power demand, and the fixed power demand includes the power load of electronic equipment, electric machinery and elevators;

[0108] The energy sources include: electrical energy and fuel.

[0109] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0110] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0111] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the steps in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0112] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0113] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 The steps for the function specified in one or more boxes.

[0114] The above are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are included in the scope of the claims of the present invention to be approved.

Claims

1. A method for determining the installed capacity of a comprehensive energy system, characterized in that: include: Based on the pre-established input-output relationship and the construction requirements of the integrated energy system, two types of parameters in the input-output relationship are determined, and the relationship between the remaining type of parameters and the system input-output ratio is obtained; Determining the installed capacity of each energy device in the integrated energy system based on the relationship between the remaining parameters and the system input-output ratio; The input-output relationship is constructed by the demand for each energy product in the integrated energy system and the mutual conversion efficiency between the various energy conversion devices invested, and the input-output relationship includes three types of parameters: energy price, equipment energy efficiency and system configuration; Based on the relationship between the remaining parameters and the system input-output ratio, the installed capacity of each energy device in the integrated energy system is determined, including: Calculate the relationship between the system input-output ratio and various parameters through partial derivative analysis; According to the relationship between the system input-output ratio and various parameters, the values ​​of various parameters when the system input-output ratio is optimal are determined, and the installed capacity of the system is determined by the parameter values.

2. The method according to claim 1, wherein The construction of the input-output relationship includes: Construct an input-output relationship based on the demand for various energy products in the integrated energy system and the mutual conversion efficiency between the various energy conversion devices used; The input-output relationship is dimensionally non-quantized to obtain a dimensionless input-output relationship.

3. The method according to claim 2, wherein The mutual conversion efficiency between the demand for each energy product in the integrated energy system and the various energy conversion devices used includes: Obtain various energy resources input and energy products output; Draw the conversion process of various energy resources input through energy conversion equipment to produce various energy products; Determining the mutual conversion efficiency between the demand for various energy products in the integrated energy system and the various energy conversion devices used based on the conversion process and the performance parameters of the energy conversion devices used in the conversion process; The energy products include: heating demand, cooling demand and fixed power demand, and the fixed power demand includes the power load of electronic equipment, electric machinery and elevators; The energy sources include: electrical energy and fuel.

4. The method according to claim 2, wherein The input-output relationship is shown as follows: Where R total : The input-output return of the entire integrated energy system within the set operating time; D c : Cooling demand within the set operating time; P c : average price of cold energy; D h : Set the heat demand during the operation time; P h : average price of thermal energy; D e,0 : Set the fixed power demand during the operation time; P e : average price of electricity; F in : The amount of fuel consumed by the integrated energy system during the set operating time; P f : average price of fuel; E in : The amount of electricity consumed by the integrated energy system during the set operating time.

5. The method according to claim 4, wherein The dimensionless relationship between input and output is as follows: Where, y: the user's cold product ratio; z: the user's hot product ratio; A: the first intermediate parameter; x: the ratio of the heat produced by the boiler to the user's total heat demand; B: the second intermediate parameter; Among them: The first intermediate parameter A is calculated as follows: Where: η boil : boiler heat generation efficiency; η CHP,h : Thermal efficiency of combined heat and power equipment; COP c : efficiency of thermal cooling; v: ratio of heat produced by electric heating equipment to the total heat demand of users; t: ratio of cooling capacity produced by electric cooling equipment to the total cooling capacity demand of users; The first intermediate parameter B is calculated as follows: Where: COP h : Efficiency of Electric Heating; EER c : efficiency of electric cooling; η CHP,e : Power generation efficiency of cogeneration equipment.

6. The method according to claim 5, wherein Determining two types of parameters in the input-output relationship and obtaining the relationship between the remaining type of parameters and the system input-output ratio includes: According to the construction requirements of the integrated energy system, two types of parameters in the input-output relationship are determined; The remaining parameters are used as independent variables to conduct partial derivative analysis to determine the relationship between the remaining parameters and the system input-output ratio.

7. The method according to claim 6, wherein The method of performing partial derivative analysis on the remaining parameters as independent variables to determine the relationship between the remaining parameters and the system input-output ratio further includes: Based on the relationship between the remaining first-category parameters and the system input-output ratio, a relationship diagram between the remaining first-category parameters and the system input-output ratio is drawn.

8. The method according to claim 6, wherein Determining two types of parameters in the input-output relationship and obtaining the relationship between the remaining type of parameters and the system input-output ratio specifically includes: When the system configuration variables and energy efficiency parameters are fixed, the relationship between energy price and input-output ratio is obtained as shown in the following formula:

9. The method according to claim 1, wherein The system configuration includes: the ratio of heat produced by the boiler to the total heat demand of the user, the ratio of heat produced by the electric heating equipment to the total heat demand of the user, and the ratio of cooling produced by the electric refrigeration equipment to the total cooling demand of the user; The energy prices include: the average price of cooling energy, the average price of heating energy, the average price of electricity and the average price of fuel; The equipment energy efficiency includes: the efficiency of thermal cooling, the efficiency of electric heating, the efficiency of electric cooling, the electricity production efficiency of cogeneration equipment, the heat production efficiency of boilers and the heat production efficiency of cogeneration equipment.

10. A system for determining the installed capacity of a comprehensive energy system, characterized in that: include: A first determination module is configured to determine two types of parameters in a pre-established input-output relationship and construction requirements of an integrated energy system, and obtain a relationship between the remaining type of parameter and the system input-output ratio; A second determining module is configured to determine the installed capacity of each energy device in the integrated energy system based on the relationship between the remaining parameters and the system input-output ratio; The input-output relationship is constructed by the demand for each energy product in the integrated energy system and the mutual conversion efficiency between the various energy conversion devices invested, and the input-output relationship includes three types of parameters: energy price, equipment energy efficiency and system configuration; The second determining module is specifically configured to: Calculate the relationship between the system input-output ratio and various parameters through partial derivative analysis; According to the relationship between the system input-output ratio and various parameters, the values ​​of various parameters when the system input-output ratio is optimal are determined, and the installed capacity of the system is determined by the parameter values.

11. The system according to claim 10, wherein: The system further comprises: a construction module for constructing an input-output relationship; The building blocks include: Construct a submodule for constructing an input-output relationship based on the demand for various energy products in the integrated energy system and the mutual conversion efficiency between the various energy conversion devices invested; The processing submodule is used to perform dimensionless processing on the input-output relationship to obtain a dimensionless input-output relationship.

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