A method, system, device and medium for calculating carbon emission reduction of an electric vehicle

Abstract

The application discloses an electric vehicle carbon emission reduction accounting method, system, device and medium, comprising: constructing a power model of electric vehicle charging and discharging; calculating the comprehensive power consumption of the electric vehicle in a time period according to the power models of charging loss, power consumption and discharging loss; analyzing based on carbon flow theory, constructing an electric vehicle charging and discharging carbon emission model; modifying the traditional equivalent mileage accounting model according to the comprehensive power consumption; determining the baseline of the carbon emission reduction calculation of the electric vehicle according to the same model of the fuel vehicle of the electric vehicle, and constructing the baseline carbon emission model based on the mileage conversion according to the modified equivalent mileage accounting model, so as to calculate the carbon emission under the baseline scenario, and calculate the carbon emission reduction of the electric vehicle replacing the fuel vehicle by combining the carbon emission under the baseline scenario and the carbon emission of the electric vehicle charging and discharging. Thus, the problem of poor precision of the electric vehicle emission reduction effect measurement in the prior art is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric vehicles, in particular to an electric vehicle carbon emission reduction accounting method, system, device and medium. BACKGROUND

[0002] With the significant increase of new energy such as photovoltaic and wind power in energy supply, the system will face more uncertainty and volatility. Therefore, a large number of energy storage systems are introduced to realize the coordinated work of energy supply, power grid, load and energy storage, which has become an inevitable trend of new power system. And because of the limited flexibility of energy supply side, the adjustment and supplement of load side become increasingly important. In recent years, the vehicle to grid (V2G) technology of electric vehicles has become a research hotspot in the face of the lack of adjustment resources. Therefore, it is of great significance to study the carbon emission reduction of electric vehicles and the contribution of electric vehicles to emission reduction.

[0003] Currently, the indirect carbon emission accounting of electric vehicles mainly has the following methods; 1) Macro statistical method mainly relies on the average carbon emission factor of power grid updated by authoritative department every year to carry out accounting. However, this method has significant time lag, because the data is updated in years, it is difficult to obtain the dynamic change of carbon emission of electric vehicles in time and accurately. 2) Carbon emission flow theory provides a clear physical basis for the emission responsibility definition of traditional load, which can trace the corresponding source side supply power of electric vehicle through power flow, and reasonably allocate the carbon emission generated by this part of power on the power generation side to electric vehicle. However, with the rise of V2G mode, this accounting process faces new challenges, such as the need to consider historical charging data and related parameters which are not easy to measure directly. Therefore, it is necessary to study the carbon emission accounting of electric vehicles with bidirectional charging and discharging.

[0004] Therefore, it is urgent to design an electric vehicle carbon emission reduction accounting method which can accurately measure the emission reduction effect of electric vehicles. SUMMARY

[0005] The present application provides an electric vehicle carbon emission reduction accounting method, system, device and medium, which is used to solve the problem of poor precision of measuring the emission reduction effect of electric vehicles in the prior art.

[0006] Therefore, the first aspect of the present application provides an electric vehicle carbon emission reduction accounting method, which comprises:

[0007] The charging and discharging of electric vehicles is divided into five parts of charging, charging loss, discharging, discharging loss and power consumption for analysis and establishment of power model of each part, so as to construct the power model of electric vehicle charging and discharging by combining the power model of each part;

[0008] According to the power model of charging loss, power consumption and discharging loss, the comprehensive power consumption of the electric vehicle in a time period is calculated;

[0009] According to the carbon flow rate of the electric vehicle charging loss, the carbon flow rate of the electric vehicle power consumption and the carbon flow rate of the electric vehicle discharging loss obtained based on the carbon flow theory analysis, the charging and discharging carbon emission model of the electric vehicle is constructed according to each carbon flow rate, so that the charging and discharging carbon emission of the electric vehicle is calculated;

[0010] According to the comprehensive power consumption, the traditional equivalent mileage accounting model is modified to obtain the modified equivalent mileage accounting model;

[0011] According to the carbon emission reduction amount calculation baseline of the electric vehicle of the same model as the fuel vehicle, the baseline carbon emission model based on mileage conversion is constructed according to the modified equivalent mileage accounting model, so that the carbon emission amount in the baseline scenario is calculated;

[0012] The carbon emission amount in the baseline scenario and the charging and discharging carbon emission of the electric vehicle are combined to calculate the emission reduction amount of the electric vehicle replacing the fuel vehicle.

[0013] Optionally, the power model of charging is:

[0014] ;

[0015] In the formula, is the electric energy of the electric vehicle charging; is the charging power injected from the ith vehicle at t time in the on-grid node;

[0016] The power model of charging loss is:

[0017] ;

[0018] In the formula, is the electric energy of the electric vehicle charging loss; is the loss power of the ith vehicle at t time when charging;

[0019] The power model of power consumption is:

[0020] ;

[0021] In the formula, is the electric energy consumed by the electric vehicle power consumption; is the consumption power of the ith vehicle at t time when power consumption;

[0022] The power model of discharging loss is:

[0023] ;

[0024] Where, The electric energy lost by electric vehicle discharge; is the power loss of the i-th vehicle when it is powered at time t;

[0025] Discharge power model:

[0026] ;

[0027] Where, The amount of electricity that supplies power to electric vehicles and grid nodes; The power supplied from the i-th vehicle to the internet node at time t.

[0028] Optionally, the power model based on charging loss, power consumption and discharge loss is used to calculate the comprehensive power consumption of the electric vehicle within a time period, and the calculation expression is:

[0029] ;

[0030] Where, For comprehensive electricity consumption, The amount of electrical energy lost in charging electric vehicles, The electrical energy consumed by electric vehicles, The electrical energy lost by electric vehicles during discharge.

[0031] Optionally, the electric vehicle charging and discharging carbon emission model is expressed as:

[0032] ;

[0033] Where, Carbon emissions from charging and discharging electric vehicles, is the carbon emission from charging loss, Carbon emissions from electricity consumption, is the composition of discharge loss carbon emissions, The carbon flow rate of electric vehicle charging loss, is the carbon flow rate of electricity used by electric vehicles, is the carbon flow rate of electric vehicle discharge loss.

[0034] Optionally, the expression of the modified equivalent mileage calculation model is:

[0035] ;

[0036] Where, is the equivalent mileage of electric vehicles and gasoline vehicles, For comprehensive electricity consumption, and are the factors affecting the energy consumption of electric vehicles by driving mode and vehicle load, and are the basic energy consumption per kilometer of the electric vehicle and the additional energy consumption of the air conditioner, respectively.

[0037] Optionally, the expression of the baseline carbon emission model is:

[0038] ;

[0039] In the formula, is the carbon emission amount in the baseline scenario, is the emission factor per kilometer of the oil car; is the equivalent mileage of the electric vehicle and the oil car, which is determined by the fuel consumption rate , the net heat value of the fuel , the carbon emission factor of the fuel , and the density of the fuel .

[0040] Optionally, the calculation expression of the reduction amount of carbon emission of the electric vehicle replacing the oil car, obtained by combining the carbon emission amount in the baseline scenario and the carbon emission of the electric vehicle charging and discharging, is:

[0041] ;

[0042] In the formula, is the reduction amount of carbon emission of the electric vehicle replacing the oil car, is the carbon emission amount in the baseline scenario, is the carbon emission amount of the electric vehicle charging and discharging.

[0043] The second aspect of the present application provides a carbon emission reduction amount accounting system of an electric vehicle, the system comprising:

[0044] A construction unit is configured to divide the charging and discharging of the electric vehicle into five parts, i.e., charging, charging loss, discharging, discharging loss, and electricity consumption, to analyze and establish power models of the parts, and to construct a power model of the charging and discharging of the electric vehicle by combining the power models of the parts;

[0045] A first calculation unit is configured to calculate the comprehensive electricity consumption of the electric vehicle in a time period according to the power models of the charging loss, the electricity consumption, and the discharging loss;

[0046] A second calculation unit is configured to obtain, based on a carbon flow theory analysis, a carbon flow rate of the charging loss of the electric vehicle, a carbon flow rate of the electricity consumption of the electric vehicle, and a carbon flow rate of the discharging loss of the electric vehicle, to construct a carbon emission amount model of the charging and discharging of the electric vehicle according to the carbon flow rates, and to calculate the carbon emission of the charging and discharging of the electric vehicle;

[0047] A correction unit is configured to modify a conventional equivalent mileage accounting model according to the comprehensive electricity consumption to obtain a modified equivalent mileage accounting model;

[0048] The third calculation unit is configured to determine a baseline for calculating the carbon emission reduction amount of the electric vehicle according to a fuel vehicle of the same model as the electric vehicle, construct a baseline carbon emission model based on mileage conversion according to the modified equivalent mileage accounting model, and calculate the carbon emission amount in the baseline scenario.

[0049] The fourth calculation unit is configured to calculate the carbon emission reduction amount of the electric vehicle replacing the fuel vehicle by combining the carbon emission amount in the baseline scenario and the carbon emission amount of the electric vehicle during charging and discharging.

[0050] The third aspect of the present application provides an electric vehicle carbon emission reduction accounting device, which comprises a processor and a memory.

[0051] The memory is configured to store program code and transmit the program code to the processor.

[0052] The processor is configured to execute the steps of the electric vehicle carbon emission reduction accounting method according to the instructions in the program code.

[0053] The fourth aspect of the present application provides a computer readable storage medium for storing program code, which is used to execute the electric vehicle carbon emission reduction accounting method of the first aspect.

[0054] From the above technical solutions, the present application has the following advantages:

[0055] (1) From the perspective of electric vehicle carbon emission measurement, the carbon emission flow theory of the power system is applied to allocate the carbon emission amount from the power supply side to the electric vehicle load side. Since the carbon emission flow is derived from accurate and reliable power measurement data, the fairness of carbon emission accounting is effectively guaranteed. This approach not only improves the accuracy of accounting, but also ensures the fairness and transparency of the accounting process.

[0056] (2) Based on the carbon flow algorithm, the electric quantity of the charging and discharging process of the electric vehicle is divided into charging electric quantity, charging loss electric quantity, electric quantity, discharging electric quantity, and discharging loss electric quantity. The differences between the charging loss carbon emission factor and the discharging carbon emission factor are considered to accurately calculate the comprehensive electric carbon emission of the electric vehicle.

[0057] (3) From the perspective of electric vehicle carbon emission reduction accounting, the present application constructs a baseline carbon emission model based on mileage conversion to accurately calculate the carbon emission amount in the baseline scenario. By combining the carbon emission amount of the electric vehicle obtained by the carbon flow theory, the carbon emission reduction amount realized by the electric vehicle replacing the fuel vehicle is finally calculated, which more accurately evaluates the contribution of the electric vehicle in emission reduction. BRIEF DESCRIPTION OF DRAWINGS

[0058] Figure 1 A flowchart of a vehicle carbon emission reduction accounting method provided in an embodiment of the present application is shown in FIG. 1.

[0059] Figure 2 A charging, power consumption, discharging structure diagram of an electric vehicle in a time period provided in an embodiment of the present application is shown in FIG. 2.

[0060] Figure 3 A structure diagram of a vehicle carbon emission reduction accounting system provided in an embodiment of the present application is shown in FIG. 3. DETAILED DESCRIPTION

[0061] In order to enable persons skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by persons skilled in the art without creative labor fall within the scope of protection of the present application.

[0062] Referring to FIG. 1, Figure 1 A vehicle carbon emission reduction accounting method provided in an embodiment of the present application includes:

[0063] Step 101, the charging and discharging of the electric vehicle is divided into charging, charging loss, discharging, discharging loss and power consumption for analysis and establishment of power models of each part, so as to construct the power model of the charging and discharging of the electric vehicle in combination with the power models of each part.

[0064] It should be noted that, for the charging and discharging of the electric vehicle, analysis is performed from the charging, charging loss, discharging, discharging loss and power consumption parts. As shown in FIG. 2, Figure 2 a power model of the charging and discharging of the electric vehicle is proposed with the grid on-grid node as the boundary.

[0065] The charging-charging loss-discharging-discharging loss-power consumption process of the electric vehicle bidirectional load is described by the following power model:

[0066] The power model of the charging is:

[0067] ; (1)

[0068] In the formula, is the electric energy of the charging of the electric vehicle; is the charging power injected at the on-grid node at time t from the ith vehicle;

[0069] The power model of the charging loss is:

[0070] ; (2)

[0071] wherein, is the electric energy of the charging loss of the electric vehicle; is the power of the i-th vehicle at time t when charging;

[0072] The power model of the electricity consumption is:

[0073] ; (3)

[0074] wherein, is the electric energy of the electricity consumption of the electric vehicle; is the power of the i-th vehicle at time t when consuming electricity;

[0075] The power model of the discharging loss is:

[0076] ; (4)

[0077] wherein, is the electric energy of the discharging loss of the electric vehicle; is the power of the i-th vehicle at time t when supplying power;

[0078] The power model of the discharging is:

[0079] ; (5)

[0080] wherein, is the electric energy of the power supply to the grid node of the electric vehicle; is the power of the i-th vehicle at time t when supplying power to the grid node.

[0081] The power model of the charging and discharging of the electric vehicle is constructed through formulas (1), (2), (3), (4), and (5).

[0082] Step 102, calculating the comprehensive electricity consumption of the electric vehicle in the time period according to the power models of the charging loss, the electricity consumption, and the discharging loss.

[0083] It should be noted that the comprehensive electricity consumption of the electric vehicle in the time period is composed of the electricity consumption, the charging loss electricity, and the discharging loss electricity, and the specific calculation is as follows:

[0084] ;

[0085] wherein, is the comprehensive electricity consumption, is the electric energy of the charging loss of the electric vehicle, is the electric energy of the electricity consumption of the electric vehicle, is the electric energy of the discharging loss of the electric vehicle.

[0086] Step 103: Based on the carbon flow theory, the carbon flow rate of the electric vehicle charging loss, the carbon flow rate of the electric vehicle electricity consumption, and the carbon flow rate of the electric vehicle discharging loss are obtained. According to each carbon flow rate, a model of the electric vehicle charging and discharging carbon emissions is constructed to calculate the electric vehicle charging and discharging carbon emissions.

[0087] It should be noted that when an electric vehicle is charging, it obtains power from the grid. The electric vehicle is essentially a load. The node carbon potential of the topological node where the electric vehicle is located is determined by the grid power structure and the network structure. The node to which the electric vehicle belongs in each period may be inconsistent. The node carbon potential of the node to which the electric vehicle belongs in this period is recorded as ( The serial number of the electric vehicle, is the corresponding time period number), and then the node carbon potential of the electric vehicle and the charging power of the electric vehicle in this period are used to calculate the , the carbon flow rate brought in by electric vehicles charging during this period can be obtained :

[0088] ;

[0089] Carbon flow rate corresponding to charging loss :

[0090] ;

[0091] When electric vehicles provide power to the power grid, they are essentially power sources and can be equivalent to generators, but their corresponding equivalent carbon emission intensity is determined by the previous time period.

[0092] Taking the scenario of charging-charging-driving-supplying electricity to the grid as an example (the specific order is not limited and can be reversed, this is just to illustrate the principle), the calculation of carbon emissions related to supplying electricity to the grid / using electricity is described. At the initial time 0, the electric vehicle's charge is n%. The initial carbon emissions of the battery during this period are attributed to the production stage, that is, its node carbon potential is considered to be 0; 0~ Always charge power Charge to a capacity of m%, and the corresponding node carbon potential is e1; ~ Always charge power Charge to the amount of r%, the corresponding node carbon potential is e2; ~ At this moment, the battery is discharged to s% for normal driving; ~ At the moment, the electric vehicle is discharged to the grid to u%. In the stage of discharging to the grid, the electric vehicle injects power into the grid as an equivalent unit. Its corresponding equivalent carbon emission intensity is determined by the previous period. Since it only consumes carbon emissions during the driving phase and does not change carbon emissions, it is essentially a cycle from 0 to The charging period determines that the electric vehicle injects carbon emissions into the electric vehicle at different node carbon potentials and charging power, and the equivalent carbon emission intensity of the electric vehicle during the discharging / power consumption period is the weighted average of the total injected carbon emissions with respect to the total charging power:

[0093] ;

[0094] Combining the equivalent carbon emission intensity and the power supply power of the electric vehicle , the following can be calculated:

[0095] Carbon flow rate injected by the electric vehicle into the power grid :

[0096] ;

[0097] Carbon flow rate of the electric vehicle :

[0098] ;

[0099] Carbon flow rate of the electric vehicle discharging loss :

[0100] ;

[0101] The comprehensive carbon emissions of the electric vehicle are composed of the power consumption carbon emissions, the charging loss carbon emissions and the discharging loss carbon emissions, and the specific calculation is as follows:

[0102] ;

[0103] Step 104, modifying the traditional equivalent mileage accounting model according to the comprehensive power consumption to obtain a modified equivalent mileage accounting model.

[0104] It should be noted that the traditional equivalent mileage accounting model is modified and optimized, and the modified equivalent mileage accounting model is represented as follows:

[0105] ;

[0106] In the formula, is the equivalent mileage of the electric vehicle and the oil vehicle, is the comprehensive power consumption, and are the influence factors of driving mode and vehicle load on the energy consumption of the electric vehicle, and are the basic energy consumption and the additional energy consumption of the air conditioner per kilometer of the electric vehicle.

[0107] Step 105, determining the baseline for calculating the carbon emission reduction of the electric vehicle according to the fuel vehicle of the same model as the electric vehicle, constructing the baseline carbon emission model based on the mileage conversion according to the revised equivalent mileage calculation model, and calculating the carbon emission under the baseline scenario.

[0108] It should be noted that when calculating the carbon emission reduction of the electric vehicle, the baseline needs to be determined. Generally, the baseline is set as the carbon emission generated by the fuel vehicle of the same model as the electric vehicle under the same driving condition and driving the same mileage, and the calculation method is as follows:

[0109] ;

[0110] In the formula, is the carbon emission under the baseline scenario, is the emission factor of the oil vehicle per kilometer; is the equivalent mileage of the electric vehicle and the oil vehicle, which is determined by the fuel consumption rate , the net heat value of the fuel , the carbon emission factor of the fuel , and the density of the fuel .

[0111] Step 106, combining the carbon emission under the baseline scenario and the carbon emission of the electric vehicle during charging and discharging to calculate the emission reduction of the electric vehicle replacing the fuel vehicle.

[0112] It should be noted that based on the baseline obtained in steps 104 and 105, the calculation method of the carbon emission reduction of the electric vehicle is proposed.

[0113] The electric vehicle will cause carbon dioxide emission when charging, and will transfer part of the carbon dioxide emission when discharging to the power grid. The actual carbon dioxide emission of the electric vehicle is the carbon dioxide emission corresponding to the electric quantity for driving and charging and discharging loss. The carbon emission reduction of the electric vehicle is the difference between the baseline carbon dioxide emission and the actual carbon dioxide emission of the electric vehicle:

[0114] ;

[0115] In the formula, is the emission reduction of the electric vehicle replacing the fuel vehicle; is the carbon emission generated by the electric vehicle (driving, charging and discharging loss).

[0116] As described above, the emission reduction of the electric vehicle replacing the fuel vehicle can be calculated.

[0117] The above is an electric vehicle carbon emission reduction calculation method provided in the embodiment of the application, and the following is an electric vehicle carbon emission reduction calculation system provided in the embodiment of the application.

[0118] Referring to Figure 3 The application embodiment provides an electric vehicle carbon emission reduction amount accounting system, which comprises:

[0119] The construction unit 201 is configured to divide the electric vehicle charging and discharging into charging, charging loss, discharging, discharging loss and power consumption, analyze the five parts and establish power models of the parts, and construct the power model of the electric vehicle charging and discharging by combining the power models of the parts.

[0120] The first calculation unit 202 is configured to calculate the comprehensive power consumption of the electric vehicle in a time period according to the power models of the charging loss, the power consumption and the discharging loss.

[0121] The second calculation unit 203 is configured to obtain the carbon flow rate of the electric vehicle charging loss, the carbon flow rate of the electric vehicle power consumption and the carbon flow rate of the electric vehicle discharging loss based on the carbon flow theory analysis, and construct the electric vehicle charging and discharging carbon emission model according to the carbon flow rates, so as to calculate the electric vehicle charging and discharging carbon emission.

[0122] The correction unit 204 is configured to modify the traditional equivalent mileage accounting model according to the comprehensive power consumption, and obtain the modified equivalent mileage accounting model.

[0123] The third calculation unit 205 is configured to determine the baseline for calculating the carbon emission reduction amount of the electric vehicle according to the fuel vehicle of the same model as the electric vehicle, construct the baseline carbon emission model based on the mileage conversion according to the modified equivalent mileage accounting model, and calculate the carbon emission amount in the baseline scenario.

[0124] The fourth calculation unit 206 is configured to calculate the carbon emission reduction amount of the electric vehicle replacing the fuel vehicle by combining the carbon emission amount in the baseline scenario and the electric vehicle charging and discharging carbon emission amount.

[0125] Further, the application embodiment further provides an electric vehicle carbon emission reduction amount accounting device, which comprises a processor and a memory:

[0126] The memory is configured to store program code and transmit the program code to the processor;

[0127] The processor is configured to execute the steps of the electric vehicle carbon emission reduction amount accounting method according to the instructions in the program code.

[0128] Further, the application embodiment further provides a computer readable storage medium, which is configured to store program code, and the program code is configured to execute the electric vehicle carbon emission reduction amount accounting method according to the above method embodiment.

[0129] Those skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working process of the system and the unit described above can refer to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0130] The terms "first", "second", "third", "fourth" and the like in the description of this application and in the claims of the foregoing drawings, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the use of the terms so clad can be interchanged, where appropriate, to convey a sense of the embodiments of the present application described herein, for example, can be carried out in other than the order shown or described herein. Also, the terms "comprise" and "have" and any variations thereof are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or apparatus that includes a list of steps or units not necessarily limited to those clearly identified, but can include other not clearly recited or inherent to such processes, methods, products or apparatus.

[0131] It should be understood that, in this application, "at least one" means one or more, and "multiple" means two or more. "And / or" is used to describe the relationship between the associated objects, which means that there can be three relationships, for example, "A and / or B" can represent three cases: only A, only B, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally represents an "or" relationship between the associated objects. "At least one of the following" or similar expressions means any combination of these items, including single or multiple items in any combination. For example, at least one of a, b or c, can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0132] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division, and actual implementation can have another division manner. For example, multiple units or components can be combined or integrated into another system, or some features can be omitted or not executed. In addition, the coupling or direct coupling or communication connection between the displayed or discussed objects can be indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0133] The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, i.e. may be located in one place, or may be distributed on multiple network units. Part or all of the units may be selected according to actual needs to achieve the purpose of the embodiment scheme.

[0134] In addition, the functional units in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0135] The integrated unit, if realized in the form of a software functional unit and sold or used as an independent product, can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application essentially or the part that contributes to the prior art or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a number of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (English full name: Read-Only Memory, English abbreviation: ROM), a random access memory (English full name: Random Access Memory, English abbreviation: RAM), a magnetic disk or an optical disk, and various program code storage media.

[0136] The above-described embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for part of the technical features; and these modifications or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An electric vehicle carbon emission reduction accounting method, characterized in that, include: The charging and discharging of electric vehicles is divided into five parts: charging, charging loss, discharging, discharge loss and power consumption. The power model of each part is established, and then the power model of electric vehicle charging and discharging is constructed by combining the power models of each part. Calculate the comprehensive power consumption of electric vehicles over a time period based on a power model of charging loss, power consumption, and discharge loss; Based on the carbon flow theory analysis, the carbon flow rate of electric vehicle charging loss, the carbon flow rate of electric vehicle electricity consumption, and the carbon flow rate of electric vehicle discharge loss are obtained. According to each carbon flow rate, the electric vehicle charging and discharging carbon emission model is constructed to calculate the electric vehicle charging and discharging carbon emission; The traditional equivalent mileage calculation model is modified according to the comprehensive electricity consumption to obtain a revised equivalent mileage calculation model; The baseline for calculating the carbon emission reduction of electric vehicles is determined based on the fuel-powered vehicles of the same model as the electric vehicles. A baseline carbon emission model based on mileage conversion is constructed based on the revised equivalent mileage accounting model to calculate the carbon emissions under the baseline scenario. The carbon emissions under the baseline scenario and the carbon emissions from charging and discharging of electric vehicles are combined to calculate the emission reductions from replacing fuel vehicles with electric vehicles; The expression of the electric vehicle charging and discharging carbon emission model is: ； wherein is the carbon emissions from charging and discharging of the electric vehicle, is the carbon emissions from charging losses, is the carbon emissions from electricity usage, is the carbon emissions from discharging losses, is the carbon flow rate from charging losses of the electric vehicle, is the carbon flow rate from electricity usage of the electric vehicle, is the carbon flow rate from discharging losses of the electric vehicle.

2. The method of claim 1, wherein, The charging power model is: ； wherein electrical energy for charging electric vehicles; Qi(t) is the charging power injected at the on-grid node from the ith vehicle at time t. The power model of charging loss is: ； wherein electric energy lost for charging the electric vehicle; is the lost power for the i-th vehicle at time t while charging. The power model of electricity consumption is: ； In the formula, is the electric energy consumed by the electric vehicle; is the consumed power of the i-th vehicle at time t when the vehicle is using electricity. The power model of discharge loss is: ； In the formula, is the electric energy of the discharging loss of the electric vehicle; is the loss power of the ith vehicle at time t when the power is supplied. Discharge power model: ； wherein the electric energy supplied by the electric vehicle to the on-grid node; the power supplied by the i-th vehicle to the on-grid node at time t.

3. The method of claim 1, wherein, The calculation expression for calculating the comprehensive power consumption of an electric vehicle within a time period based on the power model of charging loss, power consumption, and discharge loss is: ； In the formula, is the comprehensive electricity consumption, is the electric energy of the electric vehicle charging loss, is the electric energy of the electric vehicle power consumption, is the electric energy of the electric vehicle discharging loss.

4. The method of claim 1, wherein, The expression of the modified equivalent mileage calculation model is: ； wherein, is the equivalent mileage of the electric vehicle and the oil vehicle, is the total electricity consumption, and are the influence factors of the driving mode and the vehicle load on the energy consumption of the electric vehicle, respectively, and are the basic energy consumption per kilometer of the electric vehicle and the additional energy consumption of the air conditioner, respectively. 5.The method of claim 1, wherein, The expression of the baseline carbon emission model is: ； wherein, is the carbon emission amount in the baseline scenario, is the emission factor per kilometer of the oil car; is the equivalent mileage of the electric car and the oil car, determined by the fuel consumption rate , the net heat value of the fuel , the carbon emission factor of the fuel , and the density of the fuel .

6. The method of claim 1, wherein, The carbon emissions under the baseline scenario and the carbon emissions from charging and discharging of electric vehicles are combined to calculate the emission reduction amount of electric vehicles replacing fuel vehicles. The calculation expression is: ； In the formula, is the carbon emission amount of the electric vehicle to replace the fuel vehicle, is the carbon emission amount of the baseline scenario, is the carbon emission amount of the electric vehicle charging and discharging.

7. An electric vehicle carbon emission reduction amount accounting system characterized by, include: A construction unit is used to divide the charging and discharging of electric vehicles into five parts: charging, charging loss, discharging, discharge loss and power consumption, and to analyze and establish a power model for each part, thereby combining the power models of each part to construct a power model for the charging and discharging of electric vehicles; A first calculation unit is used to calculate the comprehensive power consumption of the electric vehicle within a time period according to a power model of charging loss, power consumption and discharge loss; The second calculation unit is used to obtain the carbon flow rate of electric vehicle charging loss, the carbon flow rate of electric vehicle electricity consumption, and the carbon flow rate of electric vehicle discharging loss based on carbon flow theory analysis, and to construct an electric vehicle charging and discharging carbon emission model according to each carbon flow rate, thereby calculating the electric vehicle charging and discharging carbon emission; A correction unit, used to modify the traditional equivalent mileage calculation model according to the comprehensive power consumption to obtain a corrected equivalent mileage calculation model; The third calculation unit is used to determine the baseline for calculating the carbon emission reduction of the electric vehicle based on the fuel vehicle of the same model as the electric vehicle, and to construct a baseline carbon emission model based on mileage conversion based on the revised equivalent mileage accounting model, so as to calculate the carbon emissions under the baseline scenario; A fourth calculation unit is configured to combine the carbon emission amount in the reference line scenario and the carbon emission amount of the electric vehicle charging and discharging to obtain a carbon emission reduction amount of the electric vehicle replacing a fuel vehicle. The expression of the carbon emission amount model of the electric vehicle charging and discharging is: ； wherein is the carbon emissions from charging and discharging of the electric vehicle, is the carbon emissions from charging losses, is the carbon emissions from electricity usage, is the carbon emissions from discharging losses, is the carbon flow rate from charging losses of the electric vehicle, is the carbon flow rate from electricity usage of the electric vehicle, is the carbon flow rate from discharging losses of the electric vehicle.

8. An electric vehicle carbon reduction amount accounting device characterized by comprising: The device comprises a processor and a memory: The memory is configured to store program code and transmit the program code to the processor; The processor is configured to execute the electric vehicle carbon emission reduction accounting method according to the instructions in the program code.

9. A computer-readable storage medium, characterized in that, The computer readable storage medium is configured to store program code, and the program code is configured to execute the electric vehicle carbon emission reduction accounting method.

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