Method and system for calculating integrated carbon emission factor of regional power grid, and medium

Abstract

The application provides a kind of regional power grid power supply comprehensive carbon emission factor calculation method, system and medium, method includes the following steps: determine the source of each regional power grid consumption electricity;Statistics of the total amount of power generation of power plant in this region, and determine the type of power generation;Obtain each type of electricity of the main network under the network to the region;Calculate the type of electricity of the on-grid of this region to the main network and the type of electricity of the consumption of this region, obtain each type of consumption electricity of each region;After obtaining each type of consumption electricity of each region, multiply the type of consumption electricity by the corresponding carbon emission factor to obtain the total carbon emission of this region;Divide the total carbon emission of this region by the total consumption electricity of this region to obtain the comprehensive carbon emission factor of this region.The application analyzes the influencing factors of power supply emission factor of each level power grid, establishes a regional power grid electricity exchange calculation model, which can improve the accuracy of regional power grid carbon emission accounting, and provides a basis for power grid to assist carbon reduction.

Description

Technical Field

[0001] This application relates to the field of power system technology, specifically to a method, system, and medium for calculating the comprehensive carbon emission factor of regional power grid supply. Background Technology

[0002] In my country, the types of power generation for both the electricity consumed and exchanged in most regions are not fully statistically complete, and the carbon footprint is unclear. Therefore, at the provincial and regional levels, the calculation of carbon emissions from power supply generally uses a unified carbon emission factor for the power supply region. This involves multiplying the regional carbon emission factor published by relevant departments by the regional electricity consumption to obtain the carbon emissions. For example, when relevant departments in my country delineated carbon emission factors by region, they only divided the national power grid into six major regions: North China, Northeast China, East China, Central China, Northwest China, and South China. When calculating the carbon emissions of provincial or intra-provincial power grids, provinces can only roughly estimate their power supply carbon emissions based on the carbon emission factors of these six major regions. However, the power generation resources of different provinces and cities vary significantly, and their carbon emission factors also differ. Therefore, the carbon emissions of intra-provincial power grids obtained using this rough estimation method have a large error compared to the actual carbon emissions. In addition, there are significant differences in electricity consumption time and amount, power generation type and total power generation among cities and prefectures in the province. Using the same power supply carbon emission factor to calculate carbon emissions across the province is not conducive to the power grid companies' decision-making departments understanding the spatiotemporal distribution of power supply carbon emissions in the province, and is not conducive to formulating specific carbon reduction and decarbonization measures. Summary of the Invention

[0003] The purpose of this application is to propose a method, system, and medium for calculating the comprehensive carbon emission factor of regional power grid supply, which can improve the accuracy of carbon emission accounting of regional power grid and provide a basis for power grid to help reduce carbon emissions.

[0004] The technical solution of this application:

[0005] In a first aspect, embodiments of this application provide a method for calculating the comprehensive carbon emission factor of a regional power grid, comprising the following steps:

[0006] Determine the sources of electricity absorbed by the power grid in each region;

[0007] The total power generation of power plants in this region is statistically analyzed, and the type of power generation is determined.

[0008] The various types of electricity generated from the main network to the designated area are obtained;

[0009] Calculate the various types of electricity generated from the local grid to the main grid and the various types of electricity consumed in the local area to obtain the various types of electricity consumed in each area;

[0010] The total carbon emissions of this region are obtained by multiplying the electricity consumption of each type by the corresponding carbon emission factor.

[0011] The comprehensive carbon emission factor of the region is obtained by dividing the total carbon emissions of the region by the total electricity consumption of the region.

[0012] The sources of electricity consumed by the power grid in each region are specifically the power generation within the region and the electricity transferred to and from the main grid through the 500kV transformer.

[0013] The calculation formulas for the total power generation consumed in this region and the types of power generation consumed are shown in formula (1).

[0014]

[0015] The specific calculations for the various types of electricity generated from this region to the main grid and the various types of electricity consumed in this region are as follows:

[0016] Since the amount of electricity fed into the grid through a 500kV transformer in each region is only related to its region, the calculation formulas for various types of electricity fed into the grid through a 500kV transformer in region i are shown in equation (2):

[0017]

[0018] E represents the amount of electricity fed into the main grid from k types of power plants in region i via a 500kV transformer. i-M AD represents the amount of electricity flowing into the main grid from region i via a 500kV transformer. i This indicates the amount of electricity consumed in each region. This represents the k-th type of power generation consumed by region i;

[0019] Calculation of power output from various types of 500kV transformers

[0020] Since the electricity generated by each region through the 500kV transformer is only related to the main grid, the various types of electricity generated through the 500kV transformer are shown in equation (3):

[0021]

[0022] E M- The sum of electricity flowing from the main grid to other provinces; E M+ The sum of electricity injected into the main grid of the province from outside the province, where N is the number of power supply areas and k is the type of power plant.

[0023] The kth type of power generation consumed in region i The calculation method is shown in equation (4):

[0024]

[0025] Because the offline power E of region i M-i E, power generation from main grid power plants MTotal electricity consumption for internet access in all areas Electricity E flowing into the province from other provinces M+ Electricity flowing from this province to other provinces (E) M- All are known quantities.

[0026] With β i The known constant part in equation (4) is replaced by:

[0027]

[0028] Equation (5) can be simplified to:

[0029]

[0030] The k-th type of power generation consumed in each region The calculation method is shown in equation (7):

[0031]

[0032] Due to the electricity consumption E in all areas i-M (i=1,2,3,…,N), the amount of electricity absorbed by each region AD i (i = 1, 2, 3, ..., N) are all known quantities. A matrix Γ is proposed, as shown in equation (8).

[0033]

[0034] Equation (8) can be simplified to:

[0035]

[0036] The kth type of power generation absorbed by each region can be calculated using equation (9).

[0037] The total carbon emissions (CE) of region i can be calculated based on the unit carbon emissions of the k-th type of power generation. i As shown in equation (10):

[0038]

[0039] In the formula, ρ k This represents the unit carbon emissions of the kth type of power generation;

[0040] The comprehensive carbon emission factor (CEF) of region i can be obtained by dividing the total carbon emissions of region i by the total electricity consumption of that region. i As shown in equation (11):

[0041]

[0042] Secondly, this application provides a system for calculating the comprehensive carbon emission factor of a regional power grid, including,

[0043] The source determination module is used to determine the source of electricity consumed by the power grid in each region;

[0044] The statistics module is used to calculate the total power generation of power plants in this region and determine the type of power generation.

[0045] The main network power acquisition module is used to obtain various types of power from the main network to the region.

[0046] The various types of power consumption calculation modules are used to calculate the various types of power consumption from the local area to the main network and the various types of power consumption in the local area, so as to obtain the various types of power consumption in each area.

[0047] The total carbon emission calculation module is used to obtain the electricity consumption of each type in each region, and then multiply the electricity consumption of each type by the corresponding carbon emission factor to obtain the total carbon emission of the region.

[0048] The comprehensive carbon emission factor calculation module is used to divide the total carbon emissions of the region by the total electricity consumption of the region to obtain the comprehensive carbon emission factor of the region.

[0049] The sources of electricity consumed by the power grid in each region are specifically the power generation within the region and the electricity transferred to and from the main grid through the 500kV transformer.

[0050] Thirdly, this application provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the method for calculating the integrated carbon emission factor of regional power grid supply as described above.

[0051] Fourthly, this application provides a computer-readable storage medium storing program code, which, when executed by a processor, implements the steps of the method for calculating the integrated carbon emission factor of regional power grid supply as described above.

[0052] Compared with existing technologies, the beneficial effects of this application are as follows: This application establishes a regional power grid power exchange calculation model by analyzing the influencing factors of power supply emission factors at all levels of power grids. Based on this, it designs a calculation method for the power supply emission factors of each regional power grid using the principles of proportional allocation and power conservation. This method can improve the accuracy of carbon emission accounting for regional power grids and provide a basis for power grids to contribute to carbon reduction. Attached Figure Description

[0053] Figure 1 This is a diagram illustrating the power exchange model for different power generation types in various regional power grids according to embodiments of this application.

[0054] Figure 2 This is a schematic diagram of the method flow of an embodiment of this application;

[0055] Figure 3 This is a schematic diagram of the system structure of an embodiment of this application. Detailed Implementation

[0056] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and 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.

[0057] like Figure 2 As shown, a method for calculating the comprehensive carbon emission factor of regional power grid supply is described, and the implementation steps are as follows:

[0058] S1. First, clarify the source of electricity consumed by the power grid in each region of the province. The electricity consumed by each region of the province is only related to the power generation in the region and the electricity transmitted to and from the main grid through the 500kV transformer.

[0059] S2. Calculate the total power generation of power plants in this region and identify the power generation type.

[0060] S3. The types of electricity generated from the provincial main grid to this region are only related to the main grid. The proportion of electricity generated from the main grid to each region through a 500kV transformer is equal to the electricity generated by the main grid power plant, the sum of electricity transmitted from all regions to the main grid, the electricity exported to other provinces, and the proportion of each type of electricity received from other provinces. Therefore, the types of electricity generated from the main grid to the region can be obtained.

[0061] S4. The proportions of various types of electricity connected to the main network from this region and the proportions of various types of electricity consumed in this region are the same. Therefore, the various types of electricity connected to the main network from this region can be calculated together with the various types of electricity consumed in this region.

[0062] S5. After obtaining the various types of electricity consumption in each region of the province from steps S2, S3, and S4, the total carbon emissions of the region can be obtained by multiplying the electricity consumption of each type by the corresponding carbon emission factor.

[0063] S6. Divide the total carbon emissions of this region by the total electricity consumption of this region to obtain the comprehensive carbon emission factor of this region.

[0064] The provincial power grid is primarily based on a 500kV voltage level, using 500kV substations as gateways for power exchange with other provincial power grids. The provincial 220kV and below power grid is divided into N power supply areas, with each area's power grid disconnected from the others. Power exchange between areas occurs only through 500kV transformers. Therefore, this application proposes the following... Figure 1 The equivalent model shown represents the exchange of electricity between different power generation types in a provincial regional power grid.

[0065] Where M represents the mainnet; E M-i E represents the amount of electricity injected into region i from the main grid via a 500kV transformer; i-M E represents the amount of electricity fed into the main grid from region i via a 500kV transformer; M- The sum of electricity flowing from the main grid to other provinces; E M+ This refers to the sum of electricity injected into the province's main grid from outside the province; H, S, F, and G represent four different power generation types: thermal power, hydropower, wind power, and photovoltaic power. These represent the power generation of four types of power plants in the main grid: thermal, hydro, wind, and solar. These represent the power generation of four types of power plants within region i: thermal, hydro, wind, and solar.

[0066] Depend on Figure 1 The established model shows that different regions within the province are decoupled from each other and there is no power exchange between different regions. The power consumption of each region within the province is only related to the power generation within the region and the power generation of the region through the 500kV transformer to the main grid. The calculation formula for the total power consumption of the region and the types of power consumption proposed in this application is shown in formula (1).

[0067]

[0068] Calculation of on-grid power generation for various types of 500kV transformers

[0069] Since the electricity generated by each region via a 500kV transformer is only related to its region, this application proposes the following formula for calculating the various types of electricity generated by region i via a 500kV transformer:

[0070]

[0071] 2) Calculation of power output from various types of 500kV transformers to the grid

[0072] Similarly, since the electricity generated in each region via the 500kV transformer is only related to the main grid, this application proposes the following formula (3) for the various types of electricity generated via the 500kV transformer:

[0073]

[0074] This application proposes the k-th type of power generation to be consumed in region i. The calculation method is shown in equation (4):

[0075]

[0076] Because the offline power E of region i M-i E, power generation from main grid power plants M Total electricity consumption for internet access in all areas Electricity E flowing from other provinces into the province M+ Electricity E flowing from this province to other provinces M- All of these are known quantities.

[0077] This application proposes to use β i The known constant part in equation (4) is replaced by:

[0078]

[0079] And it is proposed to simplify equation (5) as follows:

[0080]

[0081] This application proposes the k-type power generation to be absorbed by each region. The calculation method is shown in equation (7):

[0082]

[0083] Due to the electricity consumption E in all areas i-M (i=1,2,3,…,N), the amount of electricity absorbed by each region AD i (i = 1, 2, 3, ..., N) are all known quantities. This application proposes a matrix Γ, as shown in equation (8).

[0084]

[0085] This application simplifies equation (8) to:

[0086]

[0087] The kth type of power generation absorbed by each region can be calculated using equation (9).

[0088] The total carbon emissions (CE) of region i can be calculated based on the unit carbon emissions of the k-th type of power generation. i As shown in equation (10):

[0089]

[0090] In the formula, ρ kThis represents the unit carbon emissions of the k-th type of power generation.

[0091] The comprehensive carbon emission factor (CEF) of region i can be obtained by dividing the total carbon emissions of region i by the total electricity consumption of that region. i As shown in equation (11):

[0092]

[0093] like Figure 3 As shown, this application provides a system for calculating the comprehensive carbon emission factor of a regional power grid, including:

[0094] Source determination module 1 is used to determine the source of electricity absorbed by the power grid in each region;

[0095] Statistical module 2 is used to calculate the total power generation of power plants in this region and determine the type of power generation.

[0096] Main network power acquisition module 3 is used to obtain various types of power from the main network to the region;

[0097] The various types of power consumption calculation module 4 is used to calculate the various types of power consumption from the local area to the main network and the various types of power consumption in the local area, so as to obtain the various types of power consumption in each area.

[0098] The total carbon emission calculation module 5 is used to obtain the electricity consumption of each type in each region, and then multiply the electricity consumption of each type by the corresponding carbon emission factor to obtain the total carbon emission of the region.

[0099] The comprehensive carbon emission factor calculation module 6 is used to divide the total carbon emissions of the region by the total electricity consumption of the region to obtain the comprehensive carbon emission factor of the region.

[0100] Specific application examples:

[0101] The province is divided into six major power supply areas. The power generation of each type of power plant in the six major power supply areas is shown in the table below.

[0102] Table 1. Power generation of various types of power plants in different regions of the province (100 million kWh)

[0103]

[0104]

[0105] To determine the power supply emission factors of the six major regional power grids in Hubei Province, it is necessary not only to know the electricity generated by power plants of various power generation types in each region of Hubei Province, but also the electricity exchanged between the grid and the grid via 500kV transformers in each region. The established calculation model for the emission factors of the regional power grids within the province shows that the regional power grids are interconnected, with electricity exchanged only through 500kV transformers. Therefore, the electricity exchange between regional power grids is divided into electricity exchanged between the grid and the electricity transferred to the grid via 500kV transformers. The data on electricity exchanged between the grid and the grid in each region via 500kV transformers are shown in the table below.

[0106] Table 2. Electricity transmitted to the grid via 500kV transformers in each region.

[0107] Area Name Regional grid-connected electricity consumption (100 million kWh) 1 28.01 2 5.00 3 16.91 4 13.88 5 16.08 6 3.13

[0108] The electricity data for each region connected to the grid via 500kV transformers are shown in the table below.

[0109] Table 3. Electricity delivered to the grid via 500kV transformers in each region.

[0110]

[0111]

[0112] Based on the calculation method of the proportion of each generation type in the power consumption of each regional power grid in the province proposed by the present invention, the power consumption situation of the six major regions of the province is shown in the following table by substituting the data in the table above.

[0113] Table 3. Electricity Consumption by Type in the Six Major Regions of the Province (100 Million kWh)

[0114] Area Name Hydropower thermal power wind power Photovoltaics total 1 12.27 11.54 1.07 1.21 26.09 2 0.11 3.78 0.14 0.00 4.03 3 6.88 5.70 0.09 0.25 12.92 4 21.11 21.82 1.53 1.12 45.58 5 53.02 26.38 0.01 0.27 79.68 6 14.70 9.01 0.00 0.00 23.71 total 108.09 78.23 2.84 2.85 192.01

[0115] Based on the emission factor calculation method for each regional power grid in the province proposed by this invention, the power supply emission factors for each regional power grid in the province are calculated as shown in the table below.

[0116] Table 4. Emission factors of power supply in the six major regions of the province (tCO2 / MWh)

[0117]

[0118]

[0119] This application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the steps of the method for calculating the integrated carbon emission factor of regional power grid supply as described above.

[0120] This application also provides a computer-readable storage medium storing program code, which, when executed by a processor, implements the steps of the method for calculating the integrated carbon emission factor of regional power grid supply as described above.

[0121] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0122] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0123] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0124] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0125] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0126] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0127] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0128] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0129] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and not to limit them. Although this application has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of this application. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this application should be covered within the protection scope of the claims of this application.

Claims

1. A method for calculating the comprehensive carbon emission factor of regional power grid supply, characterized in that, Includes the following steps: Determine the sources of electricity absorbed by the power grid in each region; The total power generation of power plants in this region is statistically analyzed, and the type of power generation is determined. The various types of electricity generated from the main network to the designated area are obtained; Calculate the various types of electricity generated from the local grid to the main grid and the various types of electricity consumed in the local area to obtain the various types of electricity consumed in each area; The total carbon emissions of this region are obtained by multiplying the electricity consumption of each type by the corresponding carbon emission factor. The comprehensive carbon emission factor of the region is obtained by dividing the total carbon emissions of the region by the total electricity consumption of the region. The calculation formulas for the total power generation consumed in this region and the types of power generation consumed are shown in formula (1). （1） The specific calculations for the various types of electricity generated from this region to the main grid and the various types of electricity consumed in this region are as follows: The calculation formulas for various types of electricity connected to the grid via a 500kV transformer in region i are shown in equation (2): （2） This represents the amount of electricity generated by k types of power plants in region i and fed into the main grid via a 500kV transformer. This represents the amount of electricity flowing into the main grid from region i via a 500kV transformer. This indicates the amount of electricity consumed in each region. This represents the k-th type of power generation consumed by region i; Calculation of power output from various types of 500kV transformers; The various types of power generation after passing through a 500kV transformer are shown in equation (3): （3） The sum of electricity flowing from the main grid to other provinces; This represents the sum of electricity injected into the province's main power grid from outside the province, where N is the number of power supply areas and k is the type of power plant. The kth type of power generation consumed in region i The calculation method is shown in equation (4): （4） In the formula, the grid connection power of region i Power generation from main grid power plants Total electricity consumption for internet access in all areas The sum of electricity injected into the province's main grid from outside the province The sum of electricity flowing from the main grid to other provinces All are known quantities. The k-th type of power generation consumed in each region The calculation method is shown in equation (5): （5） The kth type of power generation consumed by each region can be obtained from equation (5). In the formula: ， matrix , .

2. The method for calculating the comprehensive carbon emission factor of regional power grid supply according to claim 1, characterized in that, The sources of electricity consumed by the power grid in each region are specifically the power generation within the region and the electricity transferred to and from the main grid through the 500kV transformer.

3. The method for calculating the comprehensive carbon emission factor of regional power grid supply according to claim 1, characterized in that, The total carbon emissions of region i are calculated based on the unit carbon emissions of the k-th type of power generation. As shown in equation (6): (6) In the formula, This represents the unit carbon emissions of the k-th type of power generation, where H, S, F, and G represent four different types of power generation: thermal power, hydropower, wind power, and photovoltaic power. The total carbon emissions of region i are divided by the total electricity consumption of that region to obtain the comprehensive carbon emission factor of region i. As shown in equation (7): (7)。 4. A system for calculating the comprehensive carbon emission factor of a regional power grid, used to implement the method described in any one of claims 1 to 3, characterized in that, include, The source determination module is used to determine the source of electricity consumed by the power grid in each region; The statistics module is used to calculate the total power generation of power plants in this region and determine the type of power generation. The main network power acquisition module is used to obtain various types of power from the main network to the region. The various types of power consumption calculation modules are used to calculate the various types of power consumption from the local area to the main network and the various types of power consumption in the local area, so as to obtain the various types of power consumption in each area. The total carbon emission calculation module is used to obtain the electricity consumption of each type in each region, and then multiply the electricity consumption of each type by the corresponding carbon emission factor to obtain the total carbon emission of the region. The comprehensive carbon emission factor calculation module is used to divide the total carbon emissions of the region by the total electricity consumption of the region to obtain the comprehensive carbon emission factor of the region.

5. The calculation system for the comprehensive carbon emission factor of regional power grid supply according to claim 4, characterized in that, The sources of electricity consumed by the power grid in each region are specifically the power generation within the region and the electricity transferred to and from the main grid through the 500kV transformer.

6. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the method for calculating the integrated carbon emission factor of regional power grid supply as described in any one of claims 1 to 3.

7. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores program code, which, when executed by a processor, implements the steps of the method for calculating the integrated carbon emission factor of regional power grid supply as described in any one of claims 1 to 3.

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