A method for calculating carbon emission reduction of electric vehicle charging

Abstract

The application provides a kind of electric vehicle charging carbon emission reduction calculation method, through power supply constitutes carbon intensity analysis method, considers the comprehensive carbon intensity analysis method of clean energy consumption, and fuel substitution carbon emission reduction calculation method, carries out electric vehicle charging carbon emission reduction calculation.Power supply constitutes carbon intensity analysis method, in combination with time-sharing carbon emission factor, obtains preliminary time-sharing carbon intensity;Comprehensive carbon intensity analysis method, the power supply composition of low-voltage distribution network is calculated, the proportion of 380V power grid power and clean energy supply is obtained, and the total charging amount comprehensive carbon intensity is obtained;Fuel substitution carbon emission reduction calculation method, according to total charging amount, the mileage is calculated, and the fuel substitution carbon emission reduction is obtained based on mileage equivalence.The method considers power grid peak and valley optimization, new energy efficiency consumption, fuel vehicle replacement three dimensions, rationalizes carbon emission reduction calculation, supports demand side response, clean energy construction and electric vehicle promotion three businesses.

Description

Technical Field

[0001] This invention belongs to the field of integrated energy and relates to a method for calculating carbon emission reductions from electric vehicle charging. Specifically, it relates to a method for calculating carbon emission reductions from electric vehicle charging by considering three dimensions: grid peak-valley optimization, new energy efficiency consumption, and fuel vehicle substitution. This method involves analyzing the carbon intensity of grid supply, conducting a comprehensive carbon intensity analysis that considers the consumption of clean energy, and calculating the carbon emission reduction from fuel substitution. Background Technology

[0002] The automotive industry plays a crucial role in carbon reduction within the transportation sector. As a pillar industry of my country's national economy, the automotive industry has ranked first globally in production and sales for 12 consecutive years. Effectively controlling the total carbon emissions of the automotive industry is particularly important for my country to reach its carbon emission peak as soon as possible. Automotive carbon emissions account for over 80% of carbon emissions in my country's transportation sector and approximately 7.5% of total societal carbon emissions. In 2020, carbon emissions during vehicle use accounted for about 90% of automotive carbon emissions. The large number of traditional gasoline-powered vehicles and the combustion of fossil fuels during their use are the main factors contributing to high carbon emissions during vehicle use. Currently, automotive energy consumption management standards and regulations, as well as the dual-credit policy, have already imposed controls on energy conservation and emission reduction at the production end. Establishing incentives and guidance for consumer use and creating a virtuous cycle system with the production end has become a key aspect of promoting the rapid development of new energy vehicles. Constructing an authoritative calculation and verification method for carbon emission reductions from new energy vehicle travel within the industry, and exploring new value points for new energy vehicles, is of great significance to the development of enterprises, the industry, and society.

[0003] In 2021, my country's sales of new energy vehicles reached 3.521 million units, a year-on-year increase of 1.6 times. The total number of new energy vehicles in China reached 7.84 million, accounting for 2.6% of my country's total vehicle fleet and about half of the global new energy vehicle fleet. Compared with traditional fuel-powered passenger vehicles, existing new energy passenger vehicles reduce carbon emissions by approximately 15 million tons annually during their use.

[0004] Electric vehicles (EVs) are of great significance for optimizing power grid peak and valley usage and facilitating the consumption of clean energy. However, the current promotion of EVs lacks a comprehensive exploration of their carbon emission reduction value. Although carbon value can be monetized through the application of carbon-inclusive business models, there is a lack of truly reasonable carbon emission reduction methods, especially methods that can deeply explore the multifaceted behavioral characteristics of EV charging and conduct detailed analysis of carbon emission reduction components. Therefore, it is of great significance to propose a carbon emission reduction accounting method for EV charging from three dimensions: power grid peak and valley optimization, new energy efficiency consumption, and fuel vehicle substitution. This method involves analyzing the carbon intensity of power grid supply composition, conducting a comprehensive carbon intensity analysis considering clean energy consumption, and calculating the carbon emission reduction from fuel substitution.

[0005] By using a reasonable carbon reduction accounting model, carbon inclusiveness business can be supported, carbon value can be realized, and energy conservation and carbon reduction business can be promoted in turn. It has significant value in supporting the three major businesses of demand-side response, clean energy construction and electric vehicle promotion. Summary of the Invention

[0006] To address the problems existing in the prior art, the technical problem to be solved by this invention is to provide a method for calculating the carbon emission reduction of electric vehicle charging. This method utilizes a grid supply composition carbon intensity analysis method, a comprehensive carbon intensity analysis method considering clean energy consumption, and a fuel substitution carbon emission reduction calculation method to calculate the carbon emission reduction of electric vehicle charging. The grid supply composition carbon intensity analysis method, combined with time-of-use carbon emission factors, obtains preliminary time-of-use carbon intensity. The comprehensive carbon intensity analysis method calculates the power supply composition of the low-voltage distribution network, obtaining the ratio of 380V grid power and clean energy supply, and thus the comprehensive carbon intensity of the total charging volume. The fuel substitution carbon emission reduction calculation method calculates the driving mileage based on the total charging volume and obtains the fuel substitution carbon emission reduction based on mileage equivalence. This method considers three dimensions: grid peak-valley optimization, new energy energy efficiency consumption, and fuel vehicle substitution, rationalizing the calculation of carbon emission reduction and supporting three major business areas: demand-side response, clean energy construction, and electric vehicle promotion.

[0007] The present invention adopts the following technical solution:

[0008] A method for calculating carbon emission reductions from electric vehicle charging includes the following steps: a carbon intensity analysis method based on the provincial power grid supply structure, a comprehensive carbon intensity analysis method considering the absorption of clean energy in the regional power grid, and a method for calculating carbon emission reductions from fuel substitution based on equivalent mileage.

[0009] Step 1: Carbon intensity analysis of provincial power grid supply composition, combined with time-of-use carbon emission factors of provincial power grid, to obtain preliminary carbon intensity by time period;

[0010] Step 2: Consider the comprehensive carbon intensity analysis of the clean energy consumption of the regional power grid. Taking the 380V low-voltage transformer as the node, the total load power composition of the low-voltage distribution network is obtained. The supply ratio of 380V power grid electricity and clean energy in the low-voltage distribution network is calculated. The carbon intensity of the charging component of the provincial power grid is corrected, and the comprehensive carbon intensity calculation of the actual total charging volume is completed.

[0011] Step 3: The calculation of carbon emission reduction based on equivalent journey for fuel substitution is based on the total charging amount to calculate the driving mileage, and the carbon emissions generated by the fuel vehicle under the same mileage are calculated as a benchmark to obtain the carbon emission reduction for fuel substitution.

[0012] Step 4: Classify the total emission reduction into categories such as emission reduction from electricity substitution, emission reduction from using clean energy, and emission reduction from peak shaving and valley filling.

[0013] Furthermore, step 1, the carbon intensity analysis of the provincial power grid supply structure, includes the following steps:

[0014] Step 1.1: Obtain the electric vehicle charging time-of-use charge Q EV (T i ), Time period T i The minimum time is 5 minutes, and the maximum time is 1 hour.

[0015] Step 1.2: Obtain the provincial power grid time-of-use carbon emission factor EF(T) i ), time period T i The minimum time is 5 minutes, and the maximum time is 1 hour.

[0016] Step 1.3: Calculate the preliminary carbon intensity (ep) by time period according to the following companies. g (T i ):

[0017] ep g (T i )=Q EV (T i )×EF(T i )×(1+TDL), where TDL is the power transmission loss factor, which is set to 12% by default.

[0018] Step 1.4: Calculate the grid-approved carbon intensity (EP) according to the following companies. g :

[0019] N is the maximum time period number within a charging cycle.

[0020] Furthermore, considering the comprehensive carbon intensity analysis of the regional power grid's clean energy consumption, the following steps are included:

[0021] Step 2.1: Using the 380V low-voltage transformer as a node, obtain the time-of-use electricity Q at the low-voltage transformer switch in the low-voltage distribution network. g (T i ) and on-site clean energy time-of-use generation Q d (T i This refers to the total load power composition of the low-voltage distribution network, during the time period T. i The minimum time is 5 minutes, and the maximum time is 1 hour.

[0022] Step 2.2: Calculate the supply ratio of 380V grid power and clean energy from the low-voltage distribution network.

[0023] Step 2.3: Calculate the carbon intensity EP of the provincial power grid charging components using the following formula. g Make corrections to achieve the overall carbon intensity EP of the actual total charge. EV calculate:

[0024] N is the maximum time period number within a charging cycle.

[0025] Furthermore, considering the comprehensive carbon intensity analysis of the regional power grid's clean energy consumption, the following steps are included:

[0026] Step 3.1: Calculate the equivalent mileage L under the total charging amount according to the following formula. eq :

[0027]

[0028] Where N is the maximum time period number within the charging cycle; Q EV (T i SFC (Segmented Charging Time) for electric vehicles; E This is the energy consumption per unit distance. The default value is 12.99 kWh / 100km, which is the average energy consumption of common car models nationwide. This value can be modified.

[0029] Step 3.2: Calculate the carbon emissions produced by a gasoline vehicle for the same mileage:

[0030] EP F =L eq ×SFC F ×NCV×FF

[0031] SFC F The fuel consumption per unit mileage is calculated using the average fuel economy of the top ten passenger vehicles sold in 2020, which is 4.358 kg / 100 km. This value can be modified. NCV is the net calorific value of the fuel, which is 0.04480 GJ / kg by default. FF is the CO2 emission factor of fuel consumed by fuel vehicles, which is 67.9 kgCO2 / GJ by default, based on national literature data or IPCC default value.

[0032] Step 3.3: Calculate the carbon emission reduction EP from electric vehicle fuel substitution using the following formula:

[0033] EP = EP F -EP E .

[0034] Furthermore, step 4 involves dividing the overall emission reduction amount, including the following steps:

[0035] Step 4.1: Calculate the emission reduction EP from electricity substitution re The carbon emission reduction EP obtained from the electric vehicle fuel substitution in step 3 is used as the emission reduction from the electricity substitution.

[0036] Step 4.2: Use clean energy emission reduction EP according to the following formula.clean Accounting:

[0037] EP clean =EP g -EP EV

[0038] Among them EP g The grid-approved carbon intensity obtained in step 2, EP EV The total actual charge amount is the combined carbon intensity obtained in step 3;

[0039] Step 4.3: Calculate peak shaving and valley filling emission reduction (EP) using the following formula. peak :

[0040]

[0041] Q EVBSC (T j T represents the baseline time-of-use charging volume before valley filling was implemented. j This refers to the charging period before valley filling was implemented; TDL is the power transmission loss factor, which is set to 12% by default; M is the maximum time period number within the baseline charging cycle; EP g The grid-approved carbon intensity is calculated in step 1; EF(T) i () represents the time-sharing carbon emission factor of the power grid.

[0042] The positive effects of this invention are:

[0043] (1) It can propose a reasonable carbon emission reduction calculation method from three dimensions: power grid peak and valley optimization, new energy energy efficiency consumption, and fuel vehicle replacement, which has practical value for the more reasonable calculation of the carbon emission reduction mechanism of electric vehicles.

[0044] (2) Through reasonable carbon emission reduction calculation, data support can be provided for carbon trading and carbon inclusiveness, realizing the realization of carbon value and promoting the promotion of electric vehicles.

[0045] (3) By breaking down carbon emission reduction into three dimensions, we can demonstrate the quantitative value of electric vehicle charging for the three major businesses of demand-side response, clean energy construction and electric vehicle promotion, and promote business development. Attached Figure Description

[0046] Figure 1 This is a flowchart of the method for calculating carbon emission reduction during electric vehicle charging according to the present invention. Detailed Implementation

[0047] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding the present invention, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0048] A method for calculating carbon emission reductions from electric vehicle charging utilizes a provincial power grid supply carbon intensity analysis method, a comprehensive carbon intensity analysis method considering the absorption of clean energy by the regional power grid, and a method for calculating carbon emission reductions from fuel substitution based on equivalent mileage. Figure 1 As shown, the specific steps include:

[0049] Step 1: Carbon intensity analysis of provincial power grid supply composition, combined with time-of-use carbon emission factors of provincial power grid, to obtain preliminary carbon intensity by time period;

[0050] Step 2: Consider the comprehensive carbon intensity analysis of the clean energy consumption of the regional power grid. Taking the 380V low-voltage transformer as the node, the total load power composition of the low-voltage distribution network is obtained. The supply ratio of 380V power grid electricity and clean energy in the low-voltage distribution network is calculated. The carbon intensity of the charging component of the provincial power grid is corrected, and the comprehensive carbon intensity calculation of the actual total charging volume is completed.

[0051] Step 3: The calculation of carbon emission reduction based on equivalent journey for fuel substitution is based on the total charging amount to calculate the driving mileage, and the carbon emissions generated by the fuel vehicle under the same mileage are calculated as a benchmark to obtain the carbon emission reduction for fuel substitution.

[0052] Step 4: Classify the total emission reduction into categories such as emission reduction from electricity substitution, emission reduction from using clean energy, and emission reduction from peak shaving and valley filling.

[0053] (1) Carbon intensity analysis of provincial power grid supply composition

[0054] Step 1, the carbon intensity analysis of the provincial power grid supply structure, includes the following steps:

[0055] Step 1.1: Obtain the electric vehicle charging time-of-use charge Q EV (T i ), Time period T i The minimum time is 5 minutes, and the maximum time is 1 hour.

[0056] Step 1.2: Obtain the provincial power grid time-of-use carbon emission factor EF(T) i ), time period T i The minimum time is 5 minutes, and the maximum time is 1 hour.

[0057] Step 1.3: Calculate the preliminary carbon intensity (ep) by time period according to the following companies. g(T i ):

[0058] ep g (T i )=Q EV (T i )×EF(T i )×(1+TDL), where TDL is the power transmission loss factor, which is set to 12% by default.

[0059] Step 1.4: Calculate the grid-approved carbon intensity (EP) according to the following companies. g :

[0060] N is the maximum time period number within a charging cycle.

[0061] (2) Comprehensive carbon intensity analysis considering the consumption of clean energy in the regional power grid

[0062] A comprehensive carbon intensity analysis considering the integration of clean energy into the regional power grid includes the following steps:

[0063] Step 2.1: Using the 380V low-voltage transformer as a node, obtain the time-of-use electricity Q at the low-voltage transformer switch in the low-voltage distribution network. g (T i ) and on-site clean energy time-of-use generation Q d (T i This refers to the total load power composition of the low-voltage distribution network, during the time period T. i The minimum time is 5 minutes, and the maximum time is 1 hour.

[0064] Step 2.2: Calculate the supply ratio of 380V grid power and clean energy from the low-voltage distribution network.

[0065] Step 2.3: Calculate the carbon intensity EP of the provincial power grid charging components using the following formula. g Make corrections to achieve the overall carbon intensity EP of the actual total charge. EV calculate:

[0066] N is the maximum time period number within a charging cycle.

[0067] (3) Comprehensive carbon intensity analysis considering the consumption of clean energy in the regional power grid

[0068] A comprehensive carbon intensity analysis considering the integration of clean energy into the regional power grid includes the following steps:

[0069] Step 3.1: Calculate the equivalent mileage L under the total charging amount according to the following formula. eq :

[0070]

[0071] Where N is the maximum time period number within the charging cycle; Q EV (T i SFC (Segmented Charging Time) for electric vehicles; E This is the energy consumption per unit distance. The default value is 12.99 kWh / 100km, which is the average energy consumption of common car models nationwide. This value can be modified.

[0072] Step 3.2: Calculate the carbon emissions produced by a gasoline vehicle for the same mileage:

[0073] EP F =L eq ×SFC F ×NCV×FF

[0074] SFC F The fuel consumption per unit mileage is calculated using the average fuel economy of the top ten passenger vehicles sold in 2020, which is 4.358 kg / 100 km. This value can be modified. NCV is the net calorific value of the fuel, which is 0.04480 GJ / kg by default. FF is the CO2 emission factor of fuel consumed by fuel vehicles, which is 67.9 kgCO2 / GJ by default, based on national literature data or IPCC default value.

[0075] Step 3.3: Calculate the carbon emission reduction EP from electric vehicle fuel substitution using the following formula:

[0076] EP = EP F -EP E

[0077] (4) Classification of overall emission reduction

[0078] A method for calculating carbon emission reductions from electric vehicle charging, wherein step 4 involves dividing the overall emission reduction, and includes the following steps:

[0079] Step 4.1: Calculate the emission reduction EP from electricity substitution re The carbon emission reduction EP obtained from the electric vehicle fuel substitution in step 3 is used as the emission reduction from the electricity substitution.

[0080] Step 4.2: Use clean energy emission reduction EP according to the following formula. clean Accounting:

[0081] EP clean =EP g -EP EV

[0082] Among them EP g The grid-approved carbon intensity obtained in step 2, EP EVThe total actual charge and overall carbon intensity obtained in step 3

[0083] Step 4.3: Calculate peak shaving and valley filling emission reduction (EP) using the following formula. peak :

[0084]

[0085] Q EVBSC (T j T represents the baseline time-of-use charging volume before valley filling was implemented. j This refers to the charging period before valley filling was implemented; TDL is the power transmission loss factor, which is set to 12% by default; M is the maximum time period number within the baseline charging cycle; EP g The grid-approved carbon intensity is calculated in step 1; EF(T) i () represents the time-sharing carbon emission factor of the power grid.

[0086] The following is a case study for calculation. A low-voltage distribution network was analyzed, with one hour as one time period. The table below shows the transformer switching power, photovoltaic power generation, electric vehicle charging power, and grid carbon emission factor values ​​for 24 hours a day:

[0087]

[0088]

[0089] According to the formula ep in step 1 g (T i )=Q EV (T i )×EF(T i The time-period approved carbon intensity value of the power grid is calculated by multiplying (1+TDL) by 1, and then calculated according to the formula in step 2. The unsummed portion yields the comprehensive carbon intensity values ​​for different time periods, as shown in the table below:

[0090] Period 1 2 3 4 5 6 7 8 Grid approved carbon intensity kgCO2 0.00 0.00 0.00 0.00 4.02 4.02 4.10 4.10 Overall carbon intensity kgCO2 0.00 0.00 0.00 0.00 4.02 4.02 3.97 3.92 Period 9 10 11 12 13 14 15 16 Grid approved carbon intensity kgCO2 4.10 1.97 1.91 0.00 0.00 0.00 0.00 0.00 Overall carbon intensity kgCO2 3.62 1.66 1.47 0.00 0.00 0.00 0.00 0.00 Period 17 18 19 20 21 22 23 24 Grid approved carbon intensity kgCO2 0 0 0 0 0 0 0 0 Overall carbon intensity kgCO2 0 0 0 0 0 0 0 0

[0091] We obtain the following by summing:

[0092] (1) The total amount of electric vehicle charging on that day was 40.8 kWh.

[0093] (2) This charging generates the grid-approved carbon intensity EP g It is 24.21 kg CO2.

[0094] (3) Considering the consumption of clean energy, the comprehensive carbon intensity EP generated by this charging is E It is 22.68 kg CO2.

[0095] Based on the total charge, according to the formula The equivalent mileage is 314.0878 kilometers. According to the formula EP... F =L eq ×SFC F ×NCV×FF yields the carbon emissions (EP) of a gasoline-powered vehicle at the equivalent mileage. F The result was 41.64 kg CO2.

[0096] Therefore, according to the formula EP = EP F -EP E The carbon emission reduction EP from electric vehicle fuel substitution was found to be 18.86 kg CO2.

[0097] The following calculations are based on step 4 to determine the breakdown of the overall emission reduction:

[0098] (1) Emission reduction from electricity substitution (EP) re The carbon emission reduction EP from electric vehicle fuel substitution is used as the emission reduction from electricity substitution, which is 18.86 kg CO2.

[0099] (2) Using formula EP clean =EP g -EP EV To obtain clean energy emission reduction EP clean It is 1.53 kg CO2.

[0100] (3) When calculating peak shaving and valley filling emission reduction, it is assumed that the charging period and electricity amount at the baseline time are as shown in the table below. Then, according to the formula... The first half of the data is obtained by segmenting the carbon intensity approved by the benchmark power grid and is shown in the table below.

[0101] Period 1 2 3 4 5 6 7 8 Electric vehicle charging electricity baseline kWh 0 0 0 0 0 0 0 0 Grid carbon emission factor kg / kWh 0.52 0.52 0.52 0.52 0.52 0.52 0.53 0.53 Baseline grid approved carbon intensity kgCO2 0 0 0 0 0 0 0 0 Period 9 10 11 12 13 14 15 16 Electric vehicle charging electricity baseline kWh 6.9 6.9 6.9 6.9 6.9 3.2 3.1 0 Grid carbon emission factor kg / kWh 0.53 0.55 0.55 0.55 0.55 0.56 0.56 0.56 Baseline grid approved carbon intensity kgCO2 4.10 4.25 4.25 4.25 4.25 2.01 1.94 0 Period 17 18 19 20 21 22 23 24 Electric vehicle charging electricity baseline kWh 0 0 0 0 0 0 0 0 Grid carbon emission factor kg / kWh 0.52 0.52 0.52 0.52 0.52 0.52 0.53 0.53 Baseline grid approved carbon intensity kgCO2 0 0 0 0 0 0 0 0

[0102] The baseline grid-approved carbon intensity was obtained by summing up to 25.05 kg CO2, which is compared with today's grid-approved carbon intensity EP. g By comparing (24.21 kg CO2), the peak shaving and valley filling emission reduction of this charging was found to be 0.84 kg CO2.

[0103] This method proposes a reasonable approach to calculating carbon emission reductions from three dimensions: grid peak-valley optimization, renewable energy efficiency utilization, and replacement of gasoline vehicles. This provides a more accurate and practically valuable calculation of the carbon emission reduction mechanism for electric vehicles. Reasonable carbon emission reduction calculations can provide data support for carbon trading and carbon inclusion, realizing the monetization of carbon value and promoting the adoption of electric vehicles. By breaking down carbon emission reductions into three dimensions, the method can demonstrate the quantifiable value of electric vehicle charging for demand-side response, clean energy construction, and electric vehicle promotion, thereby fostering business development.

[0104] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for calculating carbon emission reductions from electric vehicle charging, characterized in that, The carbon emission reduction of electric vehicle charging is calculated using a provincial power grid supply carbon intensity analysis method, a comprehensive carbon intensity analysis method considering the absorption of clean energy by regional power grids, and a method for calculating carbon emission reduction through fuel substitution based on equivalent mileage. The specific steps include: Step 1: Carbon intensity analysis of provincial power grid supply composition, combined with time-of-use carbon emission factors of provincial power grid, to obtain preliminary carbon intensity by time period; Carbon intensity analysis of provincial power grid supply structure includes the following steps: Step 1.1: Obtain the electric vehicle charging time-of-use electricity consumption. Time period The minimum time is 5 minutes, and the maximum time is 1 hour; Step 1.2: Obtain the time-of-use carbon emission factor of the provincial power grid Time period The minimum time is 5 minutes, and the maximum time is 1 hour; Step 1.3: Calculate the preliminary carbon intensity by time period using the following formula. : , This is the power transmission loss factor, with a default value of 12%. Step 1.4: Calculate the grid-approved carbon intensity using the following formula. : N is the maximum time period number within a charging cycle; Step 2: Consider the comprehensive carbon intensity analysis of the clean energy consumption of the regional power grid. Taking the 380V low-voltage transformer as the node, the total load power composition of the low-voltage distribution network is obtained. The supply ratio of 380V power grid electricity and clean energy in the low-voltage distribution network is calculated. The carbon intensity of the charging component of the provincial power grid is corrected, and the comprehensive carbon intensity calculation of the actual total charging volume is completed. A comprehensive carbon intensity analysis considering the integration of clean energy into the regional power grid includes the following steps: Step 2.1: Using the 380V low-voltage transformer as a node, obtain the time-of-use power consumption at the low-voltage transformer switch in the low-voltage distribution network. and on-site clean energy time-of-use power generation This refers to the total load power composition of the low-voltage distribution network, during the time period. The minimum time is 5 minutes, and the maximum time is 1 hour; Step 2.2: Calculate the supply ratio of 380V grid power and clean energy from the low-voltage distribution network. ; Step 2.3: Approve the carbon intensity for the power grid using the following formula. Make corrections to achieve the overall carbon intensity of the actual total charge. calculate: , This is the maximum time period number within a charging cycle; Step 3: The calculation of carbon emission reduction based on equivalent mileage is carried out by calculating the driving mileage based on the total charging amount, and using the carbon emissions generated by the fuel vehicle under the same mileage as a benchmark to obtain the carbon emission reduction by fuel substitution. The calculation of carbon emission reductions from fuel substitution based on equivalent mileage includes the following steps: Step 3.1: Calculate the equivalent mileage under the total charging amount using the following formula. : ， Where N is the maximum time period number within the charging cycle; Electric vehicle charging is time-based with varying electricity rates. The energy consumption per unit distance is 12.99 kWh / 100km; Step 3.2: Calculate the carbon emissions produced by a gasoline vehicle for the same mileage: ， in The fuel consumption per unit distance is 4.358 kg / 100 km. The net calorific value of the fuel is taken as 0.04480 GJ / kg; The CO2 emission factor for fuel consumed by gasoline-powered vehicles is taken as 67.9 kgCO2 / GJ; Step 3.3: Calculate the carbon emission reduction from electric vehicle fuel substitution using the following formula. : ， in The overall carbon intensity generated during charging; Step 4: Classify the overall emission reduction into categories such as emission reduction from electricity substitution, emission reduction from using clean energy, and emission reduction from peak shaving and valley filling; Step 4 involves dividing the overall emission reduction amount, including the following steps: Step 4.1: Calculate the emission reduction from electricity substitution The carbon emission reductions obtained in step 3 can be achieved by using electric vehicle fuel substitution. As a form of emission reduction through electricity substitution; Step 4.2: Calculate the emission reduction using clean energy according to the following formula. Accounting: ， in The grid-approved carbon intensity obtained in step 1, The total carbon intensity is the actual total charge obtained in step 2; Step 4.3: Calculate the peak shaving and valley filling emission reduction using the following formula. : ， in This represents the baseline time-of-use charging volume before valley filling was implemented. This refers to the charging period before valley filling was implemented; This is the power transmission loss factor, taken as 12%; M is the maximum time period number within the reference charging cycle; The grid-approved carbon intensity is calculated in step 1; This is the time-sharing carbon emission factor for the power grid.

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