Power transmission project scheme determination method considering carbon emission and cost

Abstract

The invention discloses a power transmission project scheme determination method considering carbon emission and cost, and belongs to the field of power grid construction, and the method comprises the steps: calculating an estimated carbon emission amount and an estimated cost value of each alternative power transmission project scheme according to configuration parameters in each alternative power transmission project scheme, and calculating the estimated carbon emission amount and the estimated cost value of each alternative power transmission project scheme; determining an interval intuitionistic fuzzy number of each alternative power transmission project scheme; determining a positive ideal solution and a negative ideal solution according to the interval intuitionistic fuzzy number of each alternative power transmission project scheme, and calculating compromise solution index values of each alternative power transmission project scheme according to the positive ideal solution, the negative ideal solution and the interval intuitionistic fuzzy number of each alternative power transmission project scheme; and finally, screening out an alternative power transmission project scheme with the minimum compromise solution index value as a target power transmission project scheme of the to-be-constructed area. By implementing the application, the problem that the carbon emission environmental influence factors are not considered in the power transmission project scheme selection process in the prior art can be solved.

Description

Technical Field

[0001] This invention relates to the field of power grid construction, and in particular to a method for determining power transmission engineering schemes that takes into account carbon emissions and costs. Background Technology

[0002] In the field of power grid construction, existing technologies typically select transmission engineering schemes based solely on cost, without incorporating carbon emissions into the evaluation system for transmission engineering schemes.

[0003] However, as the "dual carbon" goals gradually increase the requirements for the decarbonization of energy infrastructure, the selection method of power transmission engineering schemes that only considers cost has significant limitations: although low-cost power transmission engineering schemes can reduce capital investment, they are often limited by the configuration of equipment energy efficiency, which may lead to the risk of uncontrolled carbon emissions in the selected power transmission engineering schemes. It is difficult to achieve a synergistic balance between economic efficiency and low carbon emissions, which is not conducive to the green and sustainable development of power grid construction. Summary of the Invention

[0004] This invention provides a method for determining power transmission engineering schemes that takes into account carbon emissions and costs. This method can solve the problem that existing technologies do not consider the environmental impact factors of carbon emissions in the selection process of power transmission engineering schemes.

[0005] To address the aforementioned technical problems, one embodiment of the present invention provides a method for determining power transmission engineering schemes that considers carbon emissions and costs, comprising: Obtain several alternative power transmission project schemes for the area to be constructed; wherein, the alternative power transmission project schemes include several configuration indicators that affect the carbon emissions of the area to be constructed and configuration parameters corresponding to each configuration indicator; For each alternative power transmission project, the estimated carbon emissions and estimated cost of the alternative power transmission project are calculated based on the configuration parameters in the alternative power transmission project. Based on the estimated carbon emissions and estimated costs of each alternative power transmission project, determine the interval intuition fuzzy number for each alternative power transmission project. Based on the interval intuitionistic fuzzy numbers of each alternative power transmission project scheme, an interval intuitionistic fuzzy matrix is ​​constructed, and the positive ideal solution and negative ideal solution of the interval intuitionistic fuzzy matrix are determined. Based on the positive ideal solution, the negative ideal solution, and the interval intuition fuzzy number of each alternative power transmission project scheme, the positive distance value and the negative distance value of each alternative power transmission project scheme are calculated. Based on the interval intuition fuzzy number, positive distance value, and negative distance value of each alternative power transmission project scheme, the compromise solution decision index value of each alternative power transmission project scheme is calculated. The alternative power transmission project scheme with the smallest compromise solution decision index value is selected as the target power transmission project scheme for the area to be constructed.

[0006] Furthermore, the configuration indicators include transmission line length, anti-icing device, conductor type, tower type, insulator type, and hardware type; the configuration parameters include selected transmission line length, selected anti-icing device, selected conductor type, total conductor weight, selected tower type, total tower weight, selected insulator type, total insulator weight, selected hardware type, total hardware weight, rated line loss power per unit time, rated operating power of anti-icing device per unit time, and set total operating years. The step of calculating the estimated carbon emissions of the alternative power transmission project scheme based on the configuration parameters in the alternative power transmission project scheme includes: The carbon emissions from line construction are calculated based on the selected transmission line length and the preset carbon emission factor per unit length of foundation construction. Based on the selected anti-icing device, determine the preset carbon emission of the anti-icing device installation corresponding to the selected anti-icing device; The carbon emissions during the construction phase are calculated based on the carbon emissions from the installation of the anti-icing device and the carbon emissions from the construction of the line. The carbon emissions during the material production stage are calculated based on the total mass of the conductors, the preset carbon emission factor per unit of conductor material production, the total mass of the poles, the preset carbon emission factor per unit of pole material production, the total mass of the insulators, the preset carbon emission factor per unit of insulator material production, the total mass of the fittings, and the preset carbon emission factor per unit of fitting material production. The carbon emissions during the operation phase are calculated based on the rated power loss of the line per unit time, the rated operating power of the anti-icing device per unit time, the preset regional power grid average carbon emission factor, and the set total operating years. By integrating the carbon emissions from the construction phase, the material production phase, and the operation phase, the estimated carbon emissions of the alternative power transmission project are obtained.

[0007] Further, the step of calculating the estimated cost value of the alternative power transmission project scheme based on the configuration parameters in the alternative power transmission project scheme includes: The construction cost is calculated based on the selected transmission line length, the selected anti-icing device, the selected conductor type, the total mass of the conductor, the selected tower type, the total mass of the tower, the selected insulator type, the total mass of the insulator, the selected hardware type, and the total mass of the hardware. The maintenance cost is calculated based on the selected transmission line length, the selected tower type, the selected insulator type, the selected hardware type, and the set total service life. The operating cost is calculated based on the rated power loss of the line per unit time, the rated operating power of the anti-icing device per unit time, and the set total operating years. By integrating the construction cost, the maintenance cost, and the operating cost, the estimated cost value of the alternative power transmission project is calculated.

[0008] Furthermore, the interval intuition fuzzy number includes membership intervals and non-membership intervals under each dimension; the membership interval includes an upper limit and a lower limit of the membership interval; the non-membership interval includes an upper limit and a lower limit of the non-membership interval. The interval intuition fuzzy number for each alternative power transmission project is represented by the following expression: ; In the formula, Indicates alternative power transmission project schemes Mid-dimensional The lower bound of the membership interval; Indicates alternative power transmission project schemes Mid-dimensional The upper limit of the membership interval; Indicates alternative power transmission project schemes Mid-dimensional The lower bound of the non-membership interval; Indicates alternative power transmission project schemes Mid-dimensional The lower bound of the non-membership interval.

[0009] Furthermore, the membership intervals and non-membership intervals under each dimension include: the first membership interval and the first non-membership interval under the carbon emission dimension, and the second membership interval and the second non-membership interval under the cost dimension. Determining the positive ideal solution of the interval intuitionistic fuzzy matrix includes: Select the first membership interval with the largest upper limit as the first membership interval of the positive target; Select the first non-membership interval with the smallest upper limit as the first non-membership interval of the positive target; Select the second membership interval with the largest upper limit as the positive target second membership interval; Select the second non-membership interval with the smallest upper limit as the positive target second non-membership interval; Based on the first membership interval, the first non-membership interval, the second membership interval, and the second non-membership interval of the positive target, determine the positive ideal solution of the interval intuitionistic fuzzy matrix.

[0010] Further, determining the negative ideal solution of the interval intuitionistic fuzzy matrix includes: Select the first membership interval with the smallest upper limit as the first membership interval of the negative target; Select the first non-membership interval with the largest upper limit as the negative target first non-membership interval; Select the second membership interval with the smallest upper limit as the negative target second membership interval; Select the second non-membership interval with the largest upper limit as the negative target second non-membership interval; The negative ideal solution of the interval intuitionistic fuzzy matrix is ​​determined based on the first membership interval, the first non-membership interval, the second membership interval, and the second non-membership interval of the negative target.

[0011] Further, the step of calculating the positive and negative distance values ​​of each alternative transmission project scheme based on the positive ideal solution, the negative ideal solution, and the interval intuitionistic fuzzy number of each alternative transmission project scheme includes: For each alternative power transmission project scheme, the positive distance value of the current alternative power transmission project scheme is calculated based on the first membership interval, the first non-membership interval, the second membership interval, the second non-membership interval, and the positive ideal solution. For each alternative power transmission project scheme, the negative distance value of the current alternative power transmission project scheme is calculated based on the first membership interval, the first non-membership interval, the second membership interval, the second non-membership interval, and the negative ideal solution.

[0012] Furthermore, the compromise solution decision index values ​​include group utility value, individual regret value, and comprehensive compromise value; The compromise solution decision index value for each alternative transmission project scheme is calculated based on the interval intuitionistic fuzzy number, positive distance value, and negative distance value of each alternative transmission project scheme, including: For each alternative power transmission project, the initial prospect value of the alternative power transmission project is calculated based on the positive and negative distance values ​​of the alternative power transmission project. Based on the interval intuition fuzzy number of each alternative power transmission project scheme, the weight of the first indicator in the carbon emission dimension and the weight of the second indicator in the cost dimension are calculated. For each initial prospect value, the weighted prospect values ​​of each alternative power transmission project scheme under each dimension are calculated based on the weight of the first index, the weight of the second index, and the current initial prospect value. Based on the weights of the first and second indicators and the weighted prospect values, the group utility value and individual regret value of each alternative power transmission project scheme are calculated. Based on the group utility value and individual regret value of each alternative power transmission project, the comprehensive compromise value of each alternative power transmission project is calculated.

[0013] Furthermore, the calculation of the first indicator weight in the carbon emission dimension and the second indicator weight in the cost dimension based on the interval intuition fuzzy number of each alternative power transmission project scheme includes: Based on the first membership interval and the first non-membership interval of each alternative power transmission project scheme under the carbon emission dimension, the intuitive fuzzy entropy value of the first interval under the carbon emission dimension is calculated. Based on the second membership interval and the second non-membership interval of each alternative power transmission project scheme in the cost dimension, the intuitive fuzzy entropy value of the second interval in the cost dimension is calculated. Based on the first interval intuitive fuzzy entropy value and the second interval intuitive fuzzy entropy value, the weight of the first indicator in the carbon emission dimension and the weight of the second indicator in the cost dimension are calculated.

[0014] Furthermore, the selection of the alternative power transmission project scheme with the smallest compromise solution decision index value as the target power transmission project scheme for the area to be constructed includes: The minimum overall compromise value is taken as the target overall compromise value; Candidate power transmission engineering schemes whose overall compromise value is no greater than the target overall compromise value are selected as candidate power transmission engineering schemes. Candidate power transmission project schemes with the minimum group utility value or the minimum individual regret value are selected as the target power transmission project schemes for the area to be constructed.

[0015] The following benefits can be obtained by implementing the present invention: This invention provides a method for determining power transmission project schemes considering carbon emissions and costs. The method first calculates the estimated carbon emissions and estimated costs of each candidate power transmission project scheme based on its configuration parameters. Then, it quantifies the uncertainty using interval intuitionistic fuzzy numbers, constructs an interval intuitionistic fuzzy matrix based on the interval intuitionistic fuzzy numbers of each candidate scheme, and determines the positive and negative ideal solutions of the interval intuitionistic fuzzy matrix. Further, based on the positive and negative ideal solutions of the interval intuitionistic fuzzy matrix, and combined with the interval intuitionistic fuzzy numbers of each candidate power transmission project scheme, it calculates the positive and negative distance values ​​of each candidate scheme. On this basis, it determines the compromise solution decision index value of each candidate scheme by combining the interval intuitionistic fuzzy numbers, positive distance values, and negative distance values. Using the compromise solution decision index value as the decision-making basis, the final target power transmission project scheme is selected. Therefore, the selected target power transmission project schemes effectively achieve multi-objective synergistic optimization of cost and carbon emissions. Compared with the existing scheme selection method that only considers cost, it can not only accurately quantify the ambiguity and uncertainty of each alternative scheme in terms of cost and carbon emissions, thus improving the reliability of the decision results, but also balance the economy and low carbon emissions of the schemes by compromising the decision index values. This ensures that the selected target power transmission project schemes meet the dual requirements of capital investment control and carbon emission management, and also provides a scientific basis for scheme selection for the sustainable construction of power transmission projects. Attached Figure Description

[0016] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a flowchart illustrating a method for determining power transmission engineering schemes that takes into account carbon emissions and costs, provided in one embodiment of this application. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0020] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0021] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0022] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0023] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0024] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0025] See Figure 1To address the problem that existing technologies do not consider the environmental impact of carbon emissions during the selection of power transmission project schemes, an embodiment of the present invention provides a method for determining power transmission project schemes that considers carbon emissions and costs, comprising: S1. Obtain several alternative power transmission engineering schemes for the area to be constructed; wherein, the alternative power transmission engineering schemes include several configuration indicators that affect the carbon emissions of the area to be constructed and configuration parameters corresponding to each configuration indicator; In illustrative terms, the alternative power transmission project schemes refer to different implementation schemes designed in response to the power transmission needs of the area to be constructed, taking into account factors such as terrain conditions, transmission capacity, and technical feasibility (such as combinations of transmission line length selection, conductor material specifications, and supporting equipment selection). In this application, in order to incorporate carbon emissions into the planning and decision-making process of the power transmission project schemes, the alternative power transmission project schemes include several configuration indicators that affect the carbon emissions of the area to be constructed, as well as configuration parameters corresponding to each configuration indicator. Specifically, the configuration parameters of different alternative power transmission projects are set differently, such as the planning of transmission line length and the selection of conductor type (e.g., the distinction between ordinary steel-cored aluminum stranded wire and energy-saving aluminum alloy conductor). These differences stem from different design ideas and will have varying degrees of impact on the carbon emissions of the power transmission project in the construction area throughout the entire life cycle, including material production, construction, equipment operation and subsequent maintenance.

[0026] S2. For each alternative power transmission project scheme, the estimated carbon emissions and estimated cost of the alternative power transmission project scheme are calculated based on the configuration parameters in the alternative power transmission project scheme. To illustrate, after determining the configuration parameters of each alternative power transmission project, it is necessary to first calculate the estimated carbon emissions and estimated costs of each alternative power transmission project.

[0027] In a preferred embodiment, the configuration indicators include transmission line length, anti-icing device, conductor type, tower type, insulator type, and hardware type; the configuration parameters include selected transmission line length, selected anti-icing device, selected conductor type, total conductor mass, selected tower type, total tower mass, selected insulator type, total insulator mass, selected hardware type, total hardware mass, rated line loss power per unit time, rated operating power of anti-icing device per unit time, and set total operating years; The step of calculating the estimated carbon emissions of the alternative power transmission project scheme based on the configuration parameters in the alternative power transmission project scheme includes: The carbon emissions from line construction are calculated based on the selected transmission line length and the preset carbon emission factor per unit length of foundation construction. Based on the selected anti-icing device, determine the preset carbon emission of the anti-icing device installation corresponding to the selected anti-icing device; The carbon emissions during the construction phase are calculated based on the carbon emissions from the installation of the anti-icing device and the carbon emissions from the construction of the line. The carbon emissions during the material production stage are calculated based on the total mass of the conductors, the preset carbon emission factor per unit of conductor material production, the total mass of the poles, the preset carbon emission factor per unit of pole material production, the total mass of the insulators, the preset carbon emission factor per unit of insulator material production, the total mass of the fittings, and the preset carbon emission factor per unit of fitting material production. The carbon emissions during the operation phase are calculated based on the rated power loss of the line per unit time, the rated operating power of the anti-icing device per unit time, the preset regional power grid average carbon emission factor, and the set total operating years. By integrating the carbon emissions during the construction phase, the carbon emissions during the material production phase, and the carbon emissions during the operation phase, the estimated carbon emissions of the alternative power transmission project are obtained. To illustrate, regarding the transmission line length, a longer line increases construction costs and carbon emissions. Regarding anti-icing devices, these devices are categorized as non-icing, mechanical de-icing, and DC de-icing. While anti-icing devices increase construction and operating costs, they reduce overall transmission line operating costs. For conductor type, these include steel-cored aluminum stranded wire, aluminum alloy stranded wire, and carbon fiber composite conductors. Different conductor types have different cross-sections; larger cross-sections and higher material strength increase construction costs but lower line losses, resulting in lower operating costs and carbon emissions. Regarding tower type… This configuration index categorizes pole types into reinforced concrete poles, steel structure poles, and lightweight composite material poles. Steel structure poles have higher construction costs and carbon emissions than reinforced concrete poles. Lightweight composite material poles have the highest construction and maintenance costs but the lowest carbon emissions. For insulator types, they are categorized into porcelain insulators, glass insulators, and composite insulators. Composite insulators have high construction costs but low maintenance costs and low carbon emissions over their entire life cycle. For fittings, they include traditional fittings and energy-saving fittings. Energy-saving fittings have high construction costs but low operating costs and low carbon emissions.

[0028] As an illustration, the configuration parameters corresponding to different alternative power transmission engineering schemes are different. In order to unify the carbon emission accounting standards of each configuration parameter and ensure the accuracy and comparability of carbon emission calculation, a carbon emission standard information database corresponding to each configuration parameter has been pre-constructed. The carbon emission standard information database includes the unit production carbon emission factor of conductor components, tower components, insulator components, and hardware components in the material production stage. Specifically, different types of conductor components, tower components, insulator components, and fittings have different unit production carbon emission factors. For example, different conductor types (such as ordinary steel-cored aluminum stranded wire and energy-saving aluminum alloy conductors) have specific unit production carbon emission factors for conductor materials; different tower types have specific unit production carbon emission factors for tower materials; different insulator types have different unit production carbon emission factors for insulator materials; and different fitting types have specific unit production carbon emission factors for fitting materials. Therefore, it is necessary to first identify the configuration parameters of conductor type, tower type, insulator type, and fitting type in each alternative transmission project scheme, and then, based on these configuration parameters, automatically match the corresponding unit production carbon emission factors (unit production carbon emission factors for conductor materials, tower materials, insulator materials, and fitting materials) from the carbon emission standard information database to accurately calculate the carbon emissions during the material production stage. (Unit: The specific calculation formula is as follows: ; In the formula, Indicates the total mass of the conductor (unit: ); The carbon emission factor per unit production of conductor materials (unit: ); Indicates the total usable mass of the tower (unit: ); This indicates the carbon emission factor per unit production of tower materials (unit: ); This indicates the total usable mass of the insulators (unit: ); This indicates the carbon emission factor per unit production of insulator materials (unit: ...). ); Indicates the total mass of the hardware (unit: ); This indicates the carbon emission factor per unit of production of hardware materials (unit: ).

[0029] Specifically, the carbon emission standard information database also includes the carbon emission amount of each anti-icing device, that is, different anti-icing devices have different preset values ​​for the carbon emission amount of the installation process; thus, based on the configuration parameter of selecting an anti-icing device, the corresponding preset carbon emission amount of the anti-icing device is selected from the carbon emission standard information database. Specifically, the carbon emission standard information database also includes the carbon emission factor per unit length of foundation construction corresponding to different transmission line lengths. That is, the carbon emission factor per unit length of foundation construction varies for different transmission line lengths. Therefore, the carbon emission amount of line construction is calculated based on the selected transmission line length and the identified carbon emission factor per unit length of foundation construction corresponding to the selected transmission line length. Based on this, the carbon emissions during the construction phase are calculated according to the carbon emissions from the installation of the anti-icing device and the carbon emissions from the line construction. (Unit: The specific calculation formula is as follows: ; In the formula, Indicates the length of the transmission line (unit: km); Carbon emission factor per unit length of foundation construction (unit: ); This indicates the carbon emissions from the installation of anti-icing devices (unit: ).

[0030] Specifically, the carbon emission standard information database also includes a regional power grid average carbon emission factor. This regional power grid average carbon emission factor is used to quantify the carbon emissions corresponding to a unit of electricity consumption during the power supply process of the power grid in the area to be constructed (i.e., the average carbon emissions generated per 1 kWh of electricity consumed). Based on this, according to the rated line loss power per unit time... (Unit: kW), Rated operating power of the anti-icing device per unit time (Unit: kW) and the set total operating years The carbon emissions during the operation phase were calculated. (Unit: The specific calculation formula is as follows: ; In the formula, The average carbon emission factor of the regional power grid (unit: ); This represents the t-th year in the total set operating period; The benchmark discount rate (%) is taken as the industry standard value (e.g., 6%). Finally, by integrating the carbon emissions from the construction phase, the material production phase, and the operation phase, the estimated carbon emissions of the alternative power transmission project are obtained. The specific calculation formula is as follows: .

[0031] In a preferred embodiment, calculating the estimated cost of the alternative power transmission project based on the configuration parameters in the alternative power transmission project scheme includes: The construction cost is calculated based on the selected transmission line length, the selected anti-icing device, the selected conductor type, the total mass of the conductor, the selected tower type, the total mass of the tower, the selected insulator type, the total mass of the insulator, the selected hardware type, and the total mass of the hardware. The maintenance cost is calculated based on the selected transmission line length, the selected tower type, the selected insulator type, the selected hardware type, and the set total service life. The operating cost is calculated based on the rated power loss of the line per unit time, the rated operating power of the anti-icing device per unit time, and the set total operating years. By integrating the construction cost, the maintenance cost, and the operating cost, the estimated cost value of the alternative power transmission project is calculated. As an illustration, the equipment purchase costs and construction costs vary for transmission lines of different lengths and for different types of conductor components, tower components, insulator components, and hardware components. Therefore, in order to uniformly calculate the full-process cost of different alternative transmission engineering schemes and ensure the accuracy and efficiency of cost comparison, a cost parameter benchmark table has been constructed. Specifically, when calculating construction costs, the construction cost per unit length of transmission line is determined by consulting the cost parameter benchmark table, and the construction cost of the transmission line is calculated based on the selected transmission line length and the construction cost per unit length. Then, the equipment purchase cost and construction cost corresponding to the selected anti-icing device are determined by consulting the cost parameter benchmark table. Furthermore, the actual equipment purchase cost and actual installation cost for the selected conductor type are automatically calculated by consulting the unit equipment purchase cost and unit installation cost corresponding to the selected conductor type in the cost parameter benchmark table, and combining the total mass of the conductor and the unit equipment purchase cost and unit installation cost corresponding to the selected conductor type. Similarly, the actual equipment purchase cost and actual installation cost for the selected tower type are calculated by combining the selected tower type and the total mass of the tower. The actual equipment purchase cost and actual installation cost for the selected insulator type are calculated by combining the selected insulator type and the total mass of the insulator. Finally, the actual equipment purchase cost and actual installation cost for the selected fittings type are calculated by combining the selected fittings type and the total mass of the fittings. Finally, the construction costs of the transmission line, the equipment purchase and construction costs corresponding to the selected anti-icing device, the actual equipment purchase and installation costs for the selected conductor type, the actual equipment purchase and installation costs for the selected tower type, the actual equipment purchase and installation costs for the insulator type, and the actual equipment purchase and installation costs for the selected hardware type are added together to calculate the final construction cost. .

[0032] Specifically, based on the selected transmission line length, the maintenance cost required for the transmission line each year within the set total operating years is retrieved from the cost parameter benchmark table; similarly, the maintenance cost required for the selected tower type each year within the set total operating years is retrieved from the cost parameter benchmark table, the maintenance cost required for the selected insulator type each year within the set total operating years is retrieved from the cost parameter benchmark table, and the maintenance cost required for the selected hardware type each year within the set total operating years is retrieved from the cost parameter benchmark table. Finally, the annual maintenance cost for the entire set total operating life is calculated by summing the annual maintenance costs for the transmission line, the selected tower type, the selected insulator type, and the selected fittings type within each year of the set total operating life. .

[0033] Specifically, based on the rated power loss of the line per unit time (year), the energy cost corresponding to the line loss in each year within the set total operating period (i.e., the annual energy consumption cost converted from the power loss per unit time) is selected from the cost parameter benchmark table. Based on the rated operating power of the anti-icing device per unit time (year), the energy cost corresponding to the operation of the anti-icing device in each year within the set total operating period (i.e., the annual energy consumption cost converted from the operating power per unit time) is selected from the cost parameter benchmark table. Then, the energy cost of the line loss in each year is added to the energy cost of the anti-icing device operation to obtain the operating cost for each year within the set total operating period. ; Finally, based on construction costs Set the annual maintenance cost within the total operating life. and the operating cost for each year within the set total operating life. The estimated cost of the alternative power transmission project scheme is determined through calculation. The specific calculation formula is as follows: ; In the formula, The residual value (in ten thousand yuan) is calculated based on 5%-10% of the construction cost, depending on the actual situation.

[0034] S3. Based on the estimated carbon emissions and estimated costs of each alternative power transmission project, determine the interval intuition fuzzy number for each alternative power transmission project. As an illustration, due to measurement errors and ambiguities in the estimated cost and estimated carbon emissions, after calculating the estimated carbon emissions and estimated cost of the alternative power transmission projects, it is necessary to determine the interval intuition fuzzy number of the alternative power transmission projects based on the theory of intuitionistic fuzzy sets and through the preset interval intuitionistic fuzzy number transformation method. It should be noted that since the interval intuition fuzzy number conversion method is a well-known fuzzy mathematics processing method, its core principle (mapping the parameter prediction center value, error interval with membership degree and non-membership degree) has been fully recorded, and the relevant conversion steps (such as error interval setting, membership degree and non-membership degree calibration) have a standardized implementation process, the specific conversion logic, formula derivation and operation details of this method will not be elaborated here.

[0035] In a preferred embodiment, the interval intuitionistic fuzzy number includes membership intervals and non-membership intervals in each dimension; the membership interval includes an upper limit and a lower limit; the non-membership interval includes an upper limit and a lower limit. The interval intuition fuzzy number for each alternative power transmission project is represented by the following expression: ; In the formula, Indicates alternative power transmission project schemes Mid-dimensional The lower bound of the membership interval; Indicates alternative power transmission project schemes Mid-dimensional The upper limit of the membership interval; Indicates alternative power transmission project schemes Mid-dimensional The lower bound of the non-membership interval; Indicates alternative power transmission project schemes Mid-dimensional The lower bound of the non-membership interval; It should be noted that, .

[0036] S4. Based on the interval intuitionistic fuzzy numbers of each alternative power transmission project scheme, construct an interval intuitionistic fuzzy matrix, and determine the positive ideal solution and negative ideal solution of the interval intuitionistic fuzzy matrix; Schematic, the interval intuitionistic fuzzy matrix The specific expression is as follows: In the formula, This indicates the total number of alternative power transmission project options; When, it indicates the carbon emission dimension; "Time" indicates the cost dimension; In a preferred embodiment, the membership intervals and non-membership intervals under each dimension include: a first membership interval and a first non-membership interval under the carbon emission dimension, and a second membership interval and a second non-membership interval under the cost dimension. Determining the positive ideal solution of the interval intuitionistic fuzzy matrix includes: Select the first membership interval with the largest upper limit as the first membership interval of the positive target; Select the first non-membership interval with the smallest upper limit as the first non-membership interval of the positive target; Select the second membership interval with the largest upper limit as the positive target second membership interval; Select the second non-membership interval with the smallest upper limit as the positive target second non-membership interval; Based on the first membership interval of the positive target, the first non-membership interval of the positive target, the second membership interval of the positive target, and the second non-membership interval of the positive target, determine the positive ideal solution of the interval intuitionistic fuzzy matrix; Specifically, in the interval intuitionistic fuzzy matrix, the first membership interval with the largest upper limit is selected as the first membership interval of the positive target, and the first non-membership interval with the smallest upper limit is selected as the first non-membership interval of the positive target. Thus, the selected first membership interval and first non-membership interval of the positive target can be represented as follows: ; In the formula, This represents the lower limit of the first membership interval within the first membership interval of a positive target. This represents the upper limit of the first membership interval within the first membership interval of the positive target; This represents the lower bound of the first non-membership interval within the first non-membership interval of the positive target; This represents the upper limit of the first non-membership interval within the first non-membership interval of the positive target; Specifically, in the interval intuitionistic fuzzy matrix, the second membership interval with the largest upper limit is selected as the positive target second membership interval, and the second non-membership interval with the smallest upper limit is selected as the positive target second non-membership interval. Thus, the selected positive target second membership interval and positive target second non-membership interval can be represented as: ; In the formula, This represents the lower limit of the second membership interval in the second membership interval of the positive target; This represents the upper limit of the second membership interval in the second membership interval of the positive target; This represents the lower limit of the second non-membership interval in the second non-membership interval of the positive target; This represents the upper limit of the second non-membership interval in the second non-membership interval of the positive target; Finally, the positive ideal solution of the interval intuitionistic fuzzy matrix is ​​obtained by integration. Its expression is as follows: .

[0037] In a preferred embodiment, determining the negative ideal solution of the interval intuitionistic fuzzy matrix includes: Select the first membership interval with the smallest upper limit as the first membership interval of the negative target; Select the first non-membership interval with the largest upper limit as the negative target first non-membership interval; Select the second membership interval with the smallest upper limit as the negative target second membership interval; Select the second non-membership interval with the largest upper limit as the negative target second non-membership interval; Based on the first membership interval of the negative target, the first non-membership interval of the negative target, the second membership interval of the negative target, and the second non-membership interval of the negative target, determine the negative ideal solution of the interval intuitionistic fuzzy matrix; Specifically, in the interval intuitionistic fuzzy matrix, the first membership interval with the smallest upper limit is selected as the first membership interval of the negative target, and the first non-membership interval with the largest upper limit is selected as the first non-membership interval of the negative target. Thus, the selected first membership interval and first non-membership interval of the negative target can be represented as follows: ; In the formula, This represents the lower limit of the first membership interval within the first membership interval of the negative target; This represents the upper limit of the first membership interval within the first membership interval of the negative target; This represents the lower bound of the first non-membership interval within the first non-membership interval of the negative target; This represents the upper limit of the first non-membership interval within the first non-membership interval of the negative target; Specifically, the second membership interval with the smallest upper limit is selected as the negative target's second membership interval, and the second non-membership interval with the largest upper limit is selected as the negative target's second non-membership interval. Thus, the selected negative target's second membership interval and negative target's second non-membership interval can be represented as follows: ; In the formula, This represents the lower limit of the second membership interval in the second membership interval of the negative target; This represents the upper limit of the second membership interval in the second membership interval of the negative target; This represents the lower bound of the second non-membership interval within the second non-membership interval of the negative target; This represents the upper limit of the second non-membership interval in the second non-membership interval of the negative target; Finally, the negative ideal solution of the interval intuitionistic fuzzy matrix is ​​obtained by integration. Its expression is as follows: .

[0038] S5. Based on the positive ideal solution, the negative ideal solution, and the interval intuition fuzzy number of each alternative power transmission project scheme, calculate the positive distance value and the negative distance value of each alternative power transmission project scheme. In a preferred embodiment, the step of calculating the positive and negative distance values ​​of each alternative transmission project scheme based on the positive ideal solution, the negative ideal solution, and the interval intuitionistic fuzzy number of each alternative transmission project scheme includes: For each alternative power transmission project scheme, the positive distance value of the current alternative power transmission project scheme is calculated based on the first membership interval, the first non-membership interval, the second membership interval, the second non-membership interval, and the positive ideal solution. For each alternative power transmission project scheme, the negative distance value of the current alternative power transmission project scheme is calculated based on the first membership interval, the first non-membership interval, the second membership interval, the second non-membership interval, and the negative ideal solution. Specifically, for each alternative power transmission project scheme According to the alternative power transmission project plan The first membership interval, the first non-membership interval, the second membership interval, the second non-membership interval, and the positive ideal solution are used to calculate the alternative power transmission project schemes. positive distance value The specific calculation formula is as follows: ; Specifically, regarding alternative power transmission engineering schemes According to the alternative power transmission project plan The first membership interval, the first non-membership interval, the second membership interval, the second non-membership interval, and the negative ideal solution are used to calculate the alternative power transmission project schemes. negative distance value The specific calculation formula is as follows: .

[0039] S6. Based on the interval intuition fuzzy number, positive distance value and negative distance value of each alternative power transmission project scheme, calculate the compromise solution decision index value of each alternative power transmission project scheme; In a preferred embodiment, the compromise solution decision index value includes group utility value, individual regret value, and comprehensive compromise value; The compromise solution decision index value for each alternative transmission project scheme is calculated based on the interval intuitionistic fuzzy number, positive distance value, and negative distance value of each alternative transmission project scheme, including: For each alternative power transmission project, the initial prospect value of the alternative power transmission project is calculated based on the positive and negative distance values ​​of the alternative power transmission project. Based on the interval intuition fuzzy number of each alternative power transmission project scheme, the weight of the first indicator in the carbon emission dimension and the weight of the second indicator in the cost dimension are calculated. For each initial prospect value, the weighted prospect values ​​of each alternative power transmission project scheme under each dimension are calculated based on the weight of the first index, the weight of the second index, and the current initial prospect value. Based on the weights of the first and second indicators and the weighted prospect values, the group utility value and individual regret value of each alternative power transmission project scheme are calculated. Based on the group utility value and individual regret value of each alternative power transmission project, the comprehensive compromise value of each alternative power transmission project is calculated. Specifically, regarding alternative power transmission engineering schemes According to the alternative power transmission project plan Based on the positive and negative distance values, alternative power transmission project schemes are calculated. The initial foreground value is determined by the following steps: First, calculate the initial prospect value for profitability. (The closer to the negative ideal solution, the greater the benefit): ; In the formula, This represents the preset first risk attitude coefficient, which is an empirical value and is set to 0.88 in this embodiment; This indicates a preset first index value, which is an empirical value; in this embodiment, it is set to 0.61. Then calculate the loss-type prospect value (The further away from the ideal solution, the greater the loss): ; In the formula, This represents the preset second risk attitude coefficient, which is an empirical value, and in this embodiment it is also set to 0.88; This represents the loss aversion coefficient, which is an empirical value; in this embodiment, it is set to 2.25. This indicates a preset second index value, which is an empirical value; in this embodiment, it is set to 0.69. Finally, based on the initial profit-oriented prospect values and loss-type prospect values The alternative power transmission project schemes were calculated. initial foreground value The specific calculation formula is as follows: .

[0040] Indicatively, based on the interval intuition fuzzy numbers of each alternative power transmission project, the weights of the first indicator in the carbon emission dimension and the second indicator in the cost dimension are calculated: In a preferred embodiment, the step of calculating the first indicator weight in the carbon emission dimension and the second indicator weight in the cost dimension based on the interval intuitionistic fuzzy number of each alternative power transmission project scheme includes: Based on the first membership interval and the first non-membership interval of each alternative power transmission project scheme under the carbon emission dimension, the intuitive fuzzy entropy value of the first interval under the carbon emission dimension is calculated. Based on the second membership interval and the second non-membership interval of each alternative power transmission project scheme in the cost dimension, the intuitive fuzzy entropy value of the second interval in the cost dimension is calculated. Based on the first interval intuitive fuzzy entropy value and the second interval intuitive fuzzy entropy value, the weight of the first indicator in the carbon emission dimension and the weight of the second indicator in the cost dimension are calculated. Specifically, based on the first membership interval and the first non-membership interval of each alternative power transmission project scheme in the carbon emission dimension, the intuitive fuzzy entropy value of the first interval in the carbon emission dimension is calculated. The specific calculation formula is as follows: ; Specifically, based on the second membership interval and the second non-membership interval of each alternative power transmission project scheme in the cost dimension, the intuitive fuzzy entropy value of the second interval in the cost dimension is calculated. The specific calculation formula is as follows: ; Then, based on the first interval intuitive fuzzy entropy value under the carbon emission dimension... And the second interval intuitive fuzzy entropy value under the cost dimension The weight of the first indicator under the carbon emission dimension was calculated. The specific calculation formula is as follows: ; Then, based on the first interval intuitive fuzzy entropy value under the carbon emission dimension... And the second interval intuitive fuzzy entropy value under the cost dimension The weight of the second indicator under the cost dimension is calculated. The specific calculation formula is as follows: ; It should be noted that, .

[0041] Then, for each initial prospect value, the weighted prospect values ​​of each alternative power transmission project scheme under each dimension are calculated based on the weights of the first and second indicators and the current initial prospect value. The specific calculation formula is as follows: ; Then, from the weighted prospect values ​​of all alternative power transmission project schemes, the weighted prospect value with the highest value in each dimension is selected. ,in, ,Right now Furthermore, from the weighted prospect values ​​of all alternative power transmission project schemes, the weighted prospect value with the smallest value in each dimension is selected. ,in, ,Right now ; Alternative power transmission engineering schemes For example, based on the weight of the first indicator, the weight of the second indicator, the weighted prospect value, and the weighted prospect value with the largest value in each dimension... The weighted prospect value with the smallest value across all dimensions The alternative power transmission project schemes were calculated. group utility value The specific calculation formula is as follows: ; Alternative power transmission engineering schemes For example, based on the weight of the first indicator, the weight of the second indicator, the weighted prospect value, and the weighted prospect value with the largest value in each dimension... The weighted prospect value with the smallest value across all dimensions The alternative power transmission project schemes were calculated. Individual Regret Value : ; Finally, based on the alternative power transmission project schemes The group utility value and individual regret value are used to calculate the alternative power transmission project schemes. Overall compromise value The specific calculation formula is as follows: ; In the formula, This represents the preset decision-making mechanism coefficient, which is an empirical value. In this embodiment, =0.5; express The maximum value in; express The minimum value in; express The maximum value in; express The minimum value in.

[0042] S7. Select the alternative power transmission project scheme with the smallest compromise solution decision index value as the target power transmission project scheme for the area to be constructed. In a preferred embodiment, the step of selecting the alternative power transmission project scheme with the smallest compromise solution decision index value as the target power transmission project scheme for the area to be constructed includes: The minimum overall compromise value is taken as the target overall compromise value; Candidate power transmission engineering schemes whose overall compromise value is no greater than the target overall compromise value are selected as candidate power transmission engineering schemes. Candidate power transmission project schemes with the minimum group utility value or the minimum individual regret value are selected as target power transmission project schemes for the area to be constructed. Specifically, after obtaining the comprehensive compromise values ​​of all alternative power transmission project schemes, the comprehensive compromise value with the smallest value is selected as the target comprehensive compromise value. The candidate power transmission project schemes are selected based on the fact that the difference between the comprehensive compromise value and the target comprehensive compromise value is no greater than a preset threshold. In this embodiment, the preset threshold is 0.025, meaning that the comprehensive compromise value of the candidate power transmission project scheme needs to meet the following requirement: Finally, the candidate power transmission project schemes with the minimum group utility value or the minimum individual regret value are selected as the target power transmission project schemes for the area to be constructed.

[0043] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A method for determining power transmission project schemes considering carbon emissions and costs, characterized in that, include: Obtain several alternative power transmission project schemes for the area to be constructed; wherein, the alternative power transmission project schemes include several configuration indicators that affect the carbon emissions of the area to be constructed and configuration parameters corresponding to each configuration indicator; For each alternative power transmission project, the estimated carbon emissions and estimated cost of the alternative power transmission project are calculated based on the configuration parameters in the alternative power transmission project. Based on the estimated carbon emissions and estimated costs of each alternative power transmission project, determine the interval intuition fuzzy number for each alternative power transmission project. Based on the interval intuitionistic fuzzy numbers of each alternative power transmission project scheme, an interval intuitionistic fuzzy matrix is ​​constructed, and the positive ideal solution and negative ideal solution of the interval intuitionistic fuzzy matrix are determined. Based on the positive ideal solution, the negative ideal solution, and the interval intuition fuzzy number of each alternative power transmission project scheme, the positive distance value and the negative distance value of each alternative power transmission project scheme are calculated. Based on the interval intuition fuzzy number, positive distance value, and negative distance value of each alternative power transmission project scheme, the compromise solution decision index value of each alternative power transmission project scheme is calculated. The alternative power transmission project scheme with the smallest compromise solution decision index value is selected as the target power transmission project scheme for the area to be constructed.

2. The method for determining power transmission project schemes considering carbon emissions and costs as described in claim 1, characterized in that, The configuration indicators include transmission line length, anti-icing device, conductor type, tower type, insulator type, and hardware type; the configuration parameters include selected transmission line length, selected anti-icing device, selected conductor type, total conductor weight, selected tower type, total tower weight, selected insulator type, total insulator weight, selected hardware type, total hardware weight, rated line loss power per unit time, rated operating power of anti-icing device per unit time, and set total operating years. The step of calculating the estimated carbon emissions of the alternative power transmission project scheme based on the configuration parameters in the alternative power transmission project scheme includes: The carbon emissions from line construction are calculated based on the selected transmission line length and the preset carbon emission factor per unit length of foundation construction. Based on the selected anti-icing device, determine the preset carbon emission of the anti-icing device installation corresponding to the selected anti-icing device; The carbon emissions during the construction phase are calculated based on the carbon emissions from the installation of the anti-icing device and the carbon emissions from the construction of the line. The carbon emissions during the material production stage are calculated based on the total mass of the conductors, the preset carbon emission factor per unit of conductor material production, the total mass of the poles, the preset carbon emission factor per unit of pole material production, the total mass of the insulators, the preset carbon emission factor per unit of insulator material production, the total mass of the fittings, and the preset carbon emission factor per unit of fitting material production. The carbon emissions during the operation phase are calculated based on the rated power loss of the line per unit time, the rated operating power of the anti-icing device per unit time, the preset regional power grid average carbon emission factor, and the set total operating years. By integrating the carbon emissions from the construction phase, the material production phase, and the operation phase, the estimated carbon emissions of the alternative power transmission project are obtained.

3. The method for determining power transmission project schemes considering carbon emissions and costs as described in claim 2, characterized in that, The step of calculating the estimated cost of the alternative power transmission project based on the configuration parameters in the alternative power transmission project scheme includes: The construction cost is calculated based on the selected transmission line length, the selected anti-icing device, the selected conductor type, the total mass of the conductor, the selected tower type, the total mass of the tower, the selected insulator type, the total mass of the insulator, the selected hardware type, and the total mass of the hardware. The maintenance cost is calculated based on the selected transmission line length, the selected tower type, the selected insulator type, the selected hardware type, and the set total service life. The operating cost is calculated based on the rated power loss of the line per unit time, the rated operating power of the anti-icing device per unit time, and the set total operating years. By integrating the construction cost, the maintenance cost, and the operating cost, the estimated cost value of the alternative power transmission project is calculated.

4. The method for determining power transmission project schemes considering carbon emissions and costs as described in claim 1, characterized in that, The interval intuition fuzzy number includes membership intervals and non-membership intervals under each dimension; the membership interval includes an upper limit and a lower limit of the membership interval; the non-membership interval includes an upper limit and a lower limit of the non-membership interval. The interval intuition fuzzy number for each alternative power transmission project is represented by the following expression: ； In the formula, Indicates alternative power transmission project schemes Mid-dimensional The lower bound of the membership interval; Indicates alternative power transmission project schemes Mid-dimensional The upper limit of the membership interval; Indicates alternative power transmission project schemes Mid-dimensional The lower bound of the non-membership interval; Indicates alternative power transmission project schemes Mid-dimensional The lower bound of the non-membership interval.

5. The method for determining power transmission project schemes considering carbon emissions and costs as described in claim 4, characterized in that, The membership intervals and non-membership intervals under each dimension include: the first membership interval and the first non-membership interval under the carbon emission dimension, and the second membership interval and the second non-membership interval under the cost dimension. Determining the positive ideal solution of the interval intuitionistic fuzzy matrix includes: Select the first membership interval with the largest upper limit as the first membership interval of the positive target; Select the first non-membership interval with the smallest upper limit as the first non-membership interval of the positive target; Select the second membership interval with the largest upper limit as the positive target second membership interval; Select the second non-membership interval with the smallest upper limit as the positive target second non-membership interval; Based on the first membership interval, the first non-membership interval, the second membership interval, and the second non-membership interval of the positive target, determine the positive ideal solution of the interval intuitionistic fuzzy matrix.

6. The method for determining power transmission engineering schemes considering carbon emissions and costs as described in claim 5, characterized in that, Determining the negative ideal solution of the interval intuitionistic fuzzy matrix includes: Select the first membership interval with the smallest upper limit as the first membership interval of the negative target; Select the first non-membership interval with the largest upper limit as the negative target first non-membership interval; Select the second membership interval with the smallest upper limit as the negative target second membership interval; Select the second non-membership interval with the largest upper limit as the negative target second non-membership interval; The negative ideal solution of the interval intuitionistic fuzzy matrix is ​​determined based on the first membership interval, the first non-membership interval, the second membership interval, and the second non-membership interval of the negative target.

7. The method for determining power transmission project schemes considering carbon emissions and costs as described in claim 6, characterized in that, The step of calculating the positive and negative distance values ​​of each alternative transmission project scheme based on the positive ideal solution, the negative ideal solution, and the interval intuition fuzzy number of each alternative transmission project scheme includes: For each alternative power transmission project scheme, the positive distance value of the current alternative power transmission project scheme is calculated based on the first membership interval, the first non-membership interval, the second membership interval, the second non-membership interval, and the positive ideal solution. For each alternative power transmission project scheme, the negative distance value of the current alternative power transmission project scheme is calculated based on the first membership interval, the first non-membership interval, the second membership interval, the second non-membership interval, and the negative ideal solution.

8. The method for determining power transmission project schemes considering carbon emissions and costs as described in claim 7, characterized in that, The compromise solution decision index values ​​include group utility value, individual regret value, and comprehensive compromise value; The compromise solution decision index value for each alternative transmission project scheme is calculated based on the interval intuitionistic fuzzy number, positive distance value, and negative distance value of each alternative transmission project scheme, including: For each alternative power transmission project, the initial prospect value of the alternative power transmission project is calculated based on the positive and negative distance values ​​of the alternative power transmission project. Based on the interval intuition fuzzy number of each alternative power transmission project scheme, the weight of the first indicator in the carbon emission dimension and the weight of the second indicator in the cost dimension are calculated. For each initial prospect value, the weighted prospect values ​​of each alternative power transmission project scheme under each dimension are calculated based on the weight of the first index, the weight of the second index, and the current initial prospect value. Based on the weights of the first and second indicators and the weighted prospect values, the group utility value and individual regret value of each alternative power transmission project scheme are calculated. Based on the group utility value and individual regret value of each alternative power transmission project, the comprehensive compromise value of each alternative power transmission project is calculated.

9. The method for determining power transmission project schemes considering carbon emissions and costs as described in claim 8, characterized in that, The calculation of the first indicator weight under the carbon emission dimension and the second indicator weight under the cost dimension based on the interval intuition fuzzy number of each alternative power transmission project scheme includes: Based on the first membership interval and the first non-membership interval of each alternative power transmission project scheme under the carbon emission dimension, the intuitive fuzzy entropy value of the first interval under the carbon emission dimension is calculated. Based on the second membership interval and the second non-membership interval of each alternative power transmission project scheme in the cost dimension, the intuitive fuzzy entropy value of the second interval in the cost dimension is calculated. Based on the first interval intuitive fuzzy entropy value and the second interval intuitive fuzzy entropy value, the weight of the first indicator in the carbon emission dimension and the weight of the second indicator in the cost dimension are calculated.

10. The method for determining power transmission engineering schemes considering carbon emissions and costs as described in claim 9, characterized in that, The process of selecting the alternative power transmission project scheme with the smallest compromise solution decision index value as the target power transmission project scheme for the area to be constructed includes: The minimum overall compromise value is taken as the target overall compromise value; Candidate power transmission engineering schemes whose overall compromise value is no greater than the target overall compromise value are selected as candidate power transmission engineering schemes. Candidate power transmission project schemes with the minimum group utility value or the minimum individual regret value are selected as the target power transmission project schemes for the area to be constructed.

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