A method and device for calculating regional power carbon dioxide emission factors

Abstract

The present invention provides a method and device for calculating a regional electric power carbon dioxide emission factor. The method comprises: dividing a power supply area into grids according to a distribution network topology, and using each obtained grid as a power supply partition; using a 500kV substation in each power supply partition as a convergence point, and extracting electric power production data, electric power consumption data, and electric power interaction data; calculating the electric power carbon dioxide emission factor of the current convergence point according to the electric power production data, electric power consumption data, and electric power interaction data; calculating the electric power carbon dioxide emission factor of the current power supply partition according to the electric power carbon dioxide emission factor of the current convergence point; and calculating the electric power carbon dioxide emission factor of the area to be calculated according to the electric power carbon dioxide emission factors of the relevant power supply partitions based on the topological relationship between the area to be calculated and the power supply partitions. The method can improve the accuracy of calculating the regional electric power carbon dioxide emission factor.

Description

Technical Field

[0001] The present invention relates to the technical field of carbon emission calculation, and in particular to a method and device for calculating a regional power carbon dioxide emission factor. Background Art

[0002] The low-carbon transformation of the power industry is a top priority. The power CO2 emission factor, as a key indicator of the carbon emission intensity of power production, is crucial for evaluating the effectiveness of low-carbon technology applications and promoting the optimization of regional energy structures. Research on the power CO2 emission factor contributes to the carbon emissions accounting of the power industry itself.

[0003] By accurately calculating the CO2 emission factor for electricity, targeted emission reduction measures can be formulated. For businesses, studying the CO2 emission factor for electricity helps them manage their carbon footprint more accurately.

[0004] Against the backdrop of increasingly stringent global carbon emission policies, research on electricity CO2 emission factors at the regional and time scale will provide an important scientific basis for responding to international market demand and promoting regional low-carbon transformation. Currently, each subdivision has distinct power sources and characteristics, leading to significant variations in electricity CO2 emission factors. To more accurately calculate carbon emissions in each subdivision and further examine the actual factors within each province, more refined research on electricity CO2 emission factors by administrative division is necessary.

[0005] Patent document CN116882618A discloses a method for calculating carbon emissions of large-scale urban power systems, including the following steps: Step 1: Divide the factors affecting carbon emissions of urban power systems into three categories: economy, environment, and technology, determine the mechanism of mutual connection and interaction between parameters in different fields, and quantify the impact of different influencing factors on carbon emissions of urban power systems; Step 2: Use the hierarchical analysis method to construct an energy and power carbon emission index system to measure the carbon emission level of large-scale urban power systems; Step 3: Construct a three-dimensional data representation of time, space and attributes of urban energy and power carbon emission data, based on the production chain of electric energy, from the four aspects of energy production, transmission, distribution and use. Obtain the measured data on the carbon emission-related factors mentioned in Step 1. Step 4: Construct carbon emission models for the city's energy and power supply side, the transmission system, and the electricity consumption side, and calculate historical carbon emission data. Step 5: Preprocess the relevant factor data obtained in Step 1. For data that is unavailable or insufficient, such as missing monthly economic data, use a transfer learning method based on feature selection to supplement it. Step 6: Based on the data obtained in Steps 4 and 5, use the EMD empirical mode decomposition method to obtain time series features. Use the historical carbon emission data to train an LSTM long-short-term memory network to calculate carbon emission data for power generation, transmission, and electricity consumption enterprises. However, this method relies heavily on historical data, resulting in high modeling costs, failure to account for regional differences, and insufficient refinement. Summary of the Invention

[0006] The present invention provides a method and device for calculating a regional power carbon dioxide emission factor, which can improve the accuracy of calculating the regional power carbon dioxide emission factor.

[0007] A method for calculating regional electricity carbon dioxide emission factors, including:

[0008] According to the topology of the distribution network, the power supply area is divided into grids, and each grid obtained is used as a power supply partition;

[0009] The 500kV substation in each power supply zone is used as a collection point to extract power production data, power consumption data, and power interaction data;

[0010] Calculating the electricity CO2 emission factor of the current sink point based on the electricity production data, electricity consumption data, and electricity interaction data;

[0011] Calculate the electricity CO2 emission factor of the current power supply zone based on the electricity CO2 emission factor of the current aggregation point;

[0012] Based on the topological relationship between the area to be calculated and the power supply partition, the power carbon dioxide emission factor of the area to be calculated is calculated according to the power carbon dioxide emission factors of the relevant power supply partition.

[0013] Furthermore, the power supply partitions do not overlap with each other, and each power supply partition realizes independent power supply, and each power supply partition supplies power to one or more areas.

[0014] Furthermore, the power production data includes the power generation of grid-connected units of 500kV and above and the power generation of grid-connected units of 220kV and below, the power consumption data includes the power consumption of the power supply partition, and the power interaction data includes the power transferred to the aggregation point through the ultra-high voltage station / converter station, the power directly transferred to the aggregation point from other areas, and the power transferred from the aggregation points of other power supply partitions to the current aggregation point.

[0015] Furthermore, based on the power production data, power consumption data, and power interaction data, the power carbon dioxide emission factor of the current sink point is calculated, including:

[0016] Calculate the direct carbon emissions of 500kV and above grid-connected units in the current power supply zone based on the power generation of 500kV and above grid-connected units at the current convergence point;

[0017] The electricity consumption of the current power supply zone is subtracted from the electricity transferred to the current aggregation point via the UHV station / converter station, the electricity directly transferred to the current aggregation point from other areas, and the electricity transferred to the current aggregation point from the aggregation points of other power supply zones. This yields the reverse power of the 220kV and below grid-connected units in the current power supply zone. The carbon emissions of the 220kV and below grid-connected units in the current power supply zone transferred to the current aggregation point are calculated based on this reverse power.

[0018] Calculate the average CO2 emission factor of the UHV / converter station based on the amount of electricity transferred to the current convergence point via the UHV / converter station and its source. Calculate the carbon emissions of electricity transferred to the current convergence point via the UHV / converter station based on the average CO2 emission factor of the UHV / converter station.

[0019] Calculate the average carbon dioxide emission factors of other regions based on the amount of electricity directly transferred to the current aggregation point from other regions and its sources, and calculate the carbon emissions of other regions transferred to the current aggregation point based on the average carbon dioxide emission factors of other regions;

[0020] Calculate the carbon emissions from the aggregation points in other power supply zones to the current aggregation point based on the carbon dioxide emission factors of the electricity from the aggregation points in other power supply zones and the amount of electricity transferred to the current aggregation point;

[0021] The electricity carbon dioxide emission factor of the current aggregation point is calculated based on the power generation and direct carbon emissions of 500kV and above grid-connected units at the current aggregation point, the reverse power supply of 220kV and below grid-connected units in the current power supply section and the carbon emissions transferred to the current aggregation point, the carbon emissions and power transferred from the UHV station / converter station to the current aggregation point, the carbon emissions and power directly transferred from other areas to the current aggregation point, and the carbon emissions and power transferred from aggregation points in other power supply sections to the current aggregation point.

[0022] Furthermore, based on the amount of electricity transferred to the current convergence point through the UHV station / converter station and its source, the average CO2 emission factor of the UHV station / converter station is calculated, including:

[0023] Find the CO2 emission factor of the output area of ​​the electricity transferred to the current aggregation point through the UHV station / converter station, multiply the CO2 emission factor of each output area by the corresponding amount of electricity transferred to the current aggregation point through the UHV station / converter station, and sum them to obtain the total carbon emissions transferred to the current aggregation point through the UHV station / converter station;

[0024] Calculate the sum of all electricity transferred to the current convergence point through the UHV station / converter station;

[0025] The ratio of the total carbon emissions transferred to the current convergence point through the UHV station / converter station to the sum of all the electricity transferred to the current convergence point through the UHV station / converter station is used as the average carbon dioxide emission factor of the UHV station / converter station.

[0026] Furthermore, based on the amount of electricity directly transferred from other regions to the current aggregation point and its source, the corresponding average carbon dioxide emission factors of other regions are calculated, including:

[0027] Find the carbon dioxide emission factors of other regions corresponding to the amount of electricity directly transferred to the current sink, multiply the carbon dioxide emission factors corresponding to each other region by the amount of electricity directly transferred to the current sink, and then sum them to obtain the total carbon emissions directly transferred from other regions to the current sink;

[0028] Calculate the sum of all electricity directly transferred from other areas to the current sink point;

[0029] The ratio of the total carbon emissions directly transferred from other regions to the current aggregation point to the sum of all electricity directly transferred from the other regions to the current aggregation point is used as the average carbon dioxide emission factor of the other regions.

[0030] Furthermore, the electricity CO2 emission factor at the current aggregation point is calculated, including:

[0031] The total carbon emissions of the current sinking point are obtained by adding together the direct carbon emissions of 500kV and above grid-connected units in the current power supply zone, the carbon emissions of 220kV and below grid-connected units in the current power supply zone transferred to the current sinking point, the sum of the carbon emissions of all UHV stations / converter stations transferred to the current sinking point, the sum of the carbon emissions directly transferred to the current sinking point from all other areas, and the sum of the carbon emissions transferred to the current sinking point from sinking points in all other power supply zones.

[0032] The total power at the current convergence point is obtained by adding together the power generation of the 500kV grid-connected units in the current power supply zone, the reverse power of the 220kV and below grid-connected units in the current power supply zone, the sum of the power transferred to the current convergence point by all UHV stations / converter stations, the sum of the power directly transferred to the current convergence point by all other areas, and the sum of the power transferred to the current convergence point by the convergence points of all other power supply zones.

[0033] The ratio of the total carbon emissions of the current convergence point to the total electricity consumption of the current convergence point is used as the electricity carbon dioxide emission factor of the current convergence point.

[0034] Furthermore, based on the electricity CO2 emission factor of the current aggregation point, the electricity CO2 emission factor of the current power supply zone is calculated, including:

[0035] The sum of the electricity transferred to the current converging point from all UHV stations / converter stations, the sum of the electricity directly transferred to the current converging point from all other areas, and the sum of the electricity transferred to the current converging point from the converging points of all other power supply zones are added together to obtain the net sum of the electricity transferred to the current converging point.

[0036] Multiply the net transferred-in electricity of the current gathering point by the electricity CO2 emission factor of the current gathering point to obtain the net transferred-in carbon emissions of the current gathering point;

[0037] Calculate the direct carbon emissions of 220kV and below grid-connected units in the current power supply zone based on the power generation of 220kV and below grid-connected units in the current power supply zone;

[0038] Add the net transferred carbon emissions of the current convergence point to the direct carbon emissions of the 220kV and below grid-connected units in the current power supply zone to obtain the total carbon emissions of the current power supply zone;

[0039] Add the net inflow of electricity at the current convergence point to the generated electricity of the 220kV and below grid-connected units in the current power supply zone to obtain the total electricity of the current power supply zone;

[0040] The ratio of the total carbon emissions of the current power supply partition to the total electricity consumption of the current power supply partition is used as the electricity carbon dioxide emission factor of the current power supply partition.

[0041] Furthermore, based on the topological relationship between the area to be calculated and the power supply partition, the power CO2 emission factor of the area to be calculated is calculated according to the power CO2 emission factors of the relevant power supply partition, including:

[0042] Determine, within the area to be calculated, a first power supply partition that fully supplies power to the area to be calculated and a second power supply partition that supplies power to the area to be calculated and other areas;

[0043] Multiplying the electricity consumption of each first power supply zone by the corresponding electricity carbon dioxide emission factor of the first power supply zone, and then summing the results to obtain the carbon emissions of all first power supply zones;

[0044] The carbon emissions of each second power supply zone are obtained by adding the power consumption of the second power supply zone in the area to be calculated and the power generation of its 220kV and below grid-connected units. The carbon emissions of all second power supply zones are obtained by adding the carbon emissions of all second power supply zones.

[0045] Add the carbon emissions of all first power supply zones and the carbon emissions of all second power supply zones to obtain the total carbon emissions of the area to be calculated;

[0046] Adding the power consumption of all first power supply partitions in the area to be calculated to obtain the total power consumption of all first power supply partitions;

[0047] Add the power consumption of each second power supply zone in the area to be calculated to the power generation of its 220kV and below grid-connected units to obtain the power consumption of each second power supply zone. Add the power consumption of all second power supply zones to obtain the total power consumption of all second power supply zones.

[0048] Add the total power consumption of all first power supply zones and the total power consumption of all second power supply zones to obtain the total power consumption of the area to be calculated;

[0049] The ratio of the total carbon emissions of the area to be calculated to the total electricity consumption of the area to be calculated is used as the electricity carbon dioxide emission factor of the area to be calculated.

[0050] A device for calculating regional electricity carbon dioxide emission factors, comprising:

[0051] A partitioning module is used to divide the power supply area into grids according to the topology of the distribution network, and use each obtained grid as a power supply partition;

[0052] The data extraction module is used to extract power production data, power consumption data, and power interaction data using the 500kV substation in each power supply zone as a collection point;

[0053] a sink point calculation module, configured to calculate the power carbon dioxide emission factor of the current sink point based on the power production data, power consumption data, and power interaction data;

[0054] A first calculation module is used to calculate the power carbon dioxide emission factor of the current power supply zone based on the power carbon dioxide emission factor of the current convergence point;

[0055] The second calculation module is used to calculate the power carbon dioxide emission factor of the area to be calculated based on the topological relationship between the area to be calculated and the power supply partition and the power carbon dioxide emission factor of the relevant power supply partition.

[0056] Furthermore, the power supply partitions do not overlap with each other, and each power supply partition realizes independent power supply, and each power supply partition supplies power to one or more areas.

[0057] Furthermore, the power production data includes the power generation of grid-connected units of 500kV and above and the power generation of grid-connected units of 220kV and below, the power consumption data includes the power consumption of the power supply partition, and the power interaction data includes the power transferred to the aggregation point through the ultra-high voltage station / converter station, the power directly transferred to the aggregation point from other areas, and the power transferred from the aggregation points of other power supply partitions to the current aggregation point.

[0058] Furthermore, the sink point calculation module calculates the power carbon dioxide emission factor of the current sink point based on the power production data, power consumption data, and power interaction data, including:

[0059] Calculate the direct carbon emissions of 500kV and above grid-connected units in the current power supply zone based on the power generation of 500kV and above grid-connected units at the current convergence point;

[0060] The electricity consumption of the current power supply zone is subtracted from the electricity transferred to the current aggregation point via the UHV station / converter station, the electricity directly transferred to the current aggregation point from other areas, and the electricity transferred to the current aggregation point from the aggregation points of other power supply zones. This yields the reverse power of the 220kV and below grid-connected units in the current power supply zone. The carbon emissions of the 220kV and below grid-connected units in the current power supply zone transferred to the current aggregation point are calculated based on this reverse power.

[0061] Calculate the average CO2 emission factor of the UHV / converter station based on the amount of electricity transferred to the current convergence point via the UHV / converter station and its source. Calculate the carbon emissions of electricity transferred to the current convergence point via the UHV / converter station based on the average CO2 emission factor of the UHV / converter station.

[0062] Calculate the average carbon dioxide emission factors of other regions based on the amount of electricity directly transferred to the current aggregation point from other regions and its sources, and calculate the carbon emissions of other regions transferred to the current aggregation point based on the average carbon dioxide emission factors of other regions;

[0063] Calculate the carbon emissions from the aggregation points in other power supply zones to the current aggregation point based on the carbon dioxide emission factors of the electricity from the aggregation points in other power supply zones and the amount of electricity transferred to the current aggregation point;

[0064] The electricity carbon dioxide emission factor of the current aggregation point is calculated based on the power generation and direct carbon emissions of 500kV and above grid-connected units at the current aggregation point, the reverse power supply of 220kV and below grid-connected units in the current power supply section and the carbon emissions transferred to the current aggregation point, the carbon emissions and power transferred from the UHV station / converter station to the current aggregation point, the carbon emissions and power directly transferred from other areas to the current aggregation point, and the carbon emissions and power transferred from aggregation points in other power supply sections to the current aggregation point.

[0065] Furthermore, the sink point calculation module calculates the average carbon dioxide emission factor of the UHV station / converter station based on the amount of electricity transferred to the current sink point via the UHV station / converter station and its source, including:

[0066] Find the CO2 emission factor of the output area of ​​the electricity transferred to the current aggregation point through the UHV station / converter station, multiply the CO2 emission factor of each output area by the corresponding amount of electricity transferred to the current aggregation point through the UHV station / converter station, and sum them to obtain the total carbon emissions transferred to the current aggregation point through the UHV station / converter station;

[0067] Calculate the sum of all electricity transferred to the current convergence point through the UHV station / converter station;

[0068] The ratio of the total carbon emissions transferred to the current convergence point through the UHV station / converter station to the sum of all the electricity transferred to the current convergence point through the UHV station / converter station is used as the average carbon dioxide emission factor of the UHV station / converter station.

[0069] Furthermore, the sink point calculation module calculates the corresponding average carbon dioxide emission factors of other areas based on the amount of electricity directly transferred from other areas to the current sink point and its source, including:

[0070] Find the carbon dioxide emission factors of other regions corresponding to the amount of electricity directly transferred to the current sink, multiply the carbon dioxide emission factors corresponding to each other region by the amount of electricity directly transferred to the current sink, and then sum them to obtain the total carbon emissions directly transferred from other regions to the current sink;

[0071] Calculate the sum of all electricity directly transferred from other areas to the current sink point;

[0072] The ratio of the total carbon emissions directly transferred from other regions to the current aggregation point to the sum of all electricity directly transferred from the other regions to the current aggregation point is used as the average carbon dioxide emission factor of the other regions.

[0073] Furthermore, the sink point calculation module calculates and obtains the electricity carbon dioxide emission factor of the current sink point, including:

[0074] The total carbon emissions of the current sinking point are obtained by adding together the direct carbon emissions of 500kV and above grid-connected units in the current power supply zone, the carbon emissions of 220kV and below grid-connected units in the current power supply zone transferred to the current sinking point, the sum of the carbon emissions of all UHV stations / converter stations transferred to the current sinking point, the sum of the carbon emissions directly transferred to the current sinking point from all other areas, and the sum of the carbon emissions transferred to the current sinking point from sinking points in all other power supply zones.

[0075] The total power at the current convergence point is obtained by adding together the power generation of the 500kV grid-connected units in the current power supply zone, the reverse power of the 220kV and below grid-connected units in the current power supply zone, the sum of the power transferred to the current convergence point by all UHV stations / converter stations, the sum of the power directly transferred to the current convergence point by all other areas, and the sum of the power transferred to the current convergence point by the convergence points of all other power supply zones.

[0076] The ratio of the total carbon emissions of the current convergence point to the total electricity consumption of the current convergence point is used as the electricity carbon dioxide emission factor of the current convergence point.

[0077] Furthermore, the first calculation module calculates the power carbon dioxide emission factor of the current power supply partition based on the power carbon dioxide emission factor of the current convergence point, including:

[0078] The sum of the electricity transferred to the current converging point from all UHV stations / converter stations, the sum of the electricity directly transferred to the current converging point from all other areas, and the sum of the electricity transferred to the current converging point from the converging points of all other power supply zones are added together to obtain the net sum of the electricity transferred to the current converging point.

[0079] Multiply the net transferred-in electricity of the current gathering point by the electricity CO2 emission factor of the current gathering point to obtain the net transferred-in carbon emissions of the current gathering point;

[0080] Calculate the direct carbon emissions of 220kV and below grid-connected units in the current power supply zone based on the power generation of 220kV and below grid-connected units in the current power supply zone;

[0081] Add the net transferred carbon emissions of the current convergence point to the direct carbon emissions of the 220kV and below grid-connected units in the current power supply zone to obtain the total carbon emissions of the current power supply zone;

[0082] Add the net inflow of electricity at the current convergence point to the generated electricity of the 220kV and below grid-connected units in the current power supply zone to obtain the total electricity of the current power supply zone;

[0083] The ratio of the total carbon emissions of the current power supply partition to the total electricity consumption of the current power supply partition is used as the electricity carbon dioxide emission factor of the current power supply partition.

[0084] Furthermore, the second calculation module calculates the power CO2 emission factor of the area to be calculated based on the topological relationship between the area to be calculated and the power supply partition and according to the power CO2 emission factor of the relevant power supply partition, including:

[0085] Determine, within the area to be calculated, a first power supply partition that fully supplies power to the area to be calculated and a second power supply partition that supplies power to the area to be calculated and other areas;

[0086] Multiplying the electricity consumption of each first power supply zone by the corresponding electricity carbon dioxide emission factor of the first power supply zone, and then summing the results to obtain the carbon emissions of all first power supply zones;

[0087] The carbon emissions of each second power supply zone are obtained by adding the power consumption of the second power supply zone in the area to be calculated and the power generation of its 220kV and below grid-connected units. The carbon emissions of all second power supply zones are obtained by adding the carbon emissions of all second power supply zones.

[0088] Add the carbon emissions of all first power supply zones and the carbon emissions of all second power supply zones to obtain the total carbon emissions of the area to be calculated;

[0089] Adding the power consumption of all first power supply partitions in the area to be calculated to obtain the total power consumption of all first power supply partitions;

[0090] Add the power consumption of each second power supply zone in the area to be calculated to the power generation of its 220kV and below grid-connected units to obtain the power consumption of each second power supply zone. Add the power consumption of all second power supply zones to obtain the total power consumption of all second power supply zones.

[0091] Add the total power consumption of all first power supply zones and the total power consumption of all second power supply zones to obtain the total power consumption of the area to be calculated;

[0092] The ratio of the total carbon emissions of the area to be calculated to the total electricity consumption of the area to be calculated is used as the electricity carbon dioxide emission factor of the area to be calculated.

[0093] The method and device for calculating regional power carbon dioxide emission factors provided by the present invention have at least the following beneficial effects:

[0094] (1) As the power supply structure of different power supply zones is quite different, power sources of different natures have different access voltage levels and different power generation capacities, the carbon emissions and power CO2 emission factors are calculated based on the power properties and weight ratios of the 500 kV power grid and the 220 kV and below power grids, which can fully reflect the power supply structure and electricity consumption characteristics and effectively improve the accuracy of the calculation of the power CO2 factor.

[0095] (2) The 500 kV substation within the power supply zone is regarded as the convergence point. With the power supply zone convergence point as the center, the convergence power and carbon factor of the convergence point are calculated. Then, the carbon factor of the 220 kV zone is calculated based on the power transmission from the 500 kV convergence point and the power generation of 220 kV and below. This can more scientifically reflect the actual operating characteristics of the power system.

[0096] (3) The electricity transferred from other regions to the current area to be calculated is generally transferred through three methods: converter stations, ultra-high voltage channels, and direct transfer. Considering the nature of external electricity serving the entire area, when calculating the electricity transferred from other regions, the power CO2 emission factor is uniformly taken as the weighted average of their power CO2 emission factors, which can better reflect the fairness of electricity use;

[0097] (4) Based on the power supply zoning, conducting research and calculation of regional power CO2 emission factors will greatly simplify the relevant work content and steps and more truly reflect the power interaction topology relationship. BRIEF DESCRIPTION OF THE DRAWINGS

[0098] Figure 1 This is a flow chart of an embodiment of the method for calculating regional electricity carbon dioxide emission factors provided by the present invention.

[0099] Figure 2 The present invention provides a flowchart of an embodiment of the method for calculating the carbon dioxide emission factor of the regional electricity power provided by the present invention for calculating the carbon dioxide emission factor of the convergence point power.

[0100] Figure 3 The present invention provides a flowchart of an embodiment of the method for calculating the regional electricity carbon dioxide emission factor for calculating the electricity carbon dioxide emission factor for a power supply zone.

[0101] Figure 4 The present invention provides a flowchart of an embodiment of calculating the regional power carbon dioxide emission factor to be calculated in the method for calculating the regional power carbon dioxide emission factor provided by the present invention.

[0102] Figure 5 This is a structural schematic diagram of an embodiment of the regional electricity carbon dioxide emission factor calculation device provided by the present invention. DETAILED DESCRIPTION

[0103] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0104] refer to Figure 1 In some embodiments, a method for calculating a regional electricity carbon dioxide emission factor is provided, comprising:

[0105] S1. Divide the power supply area into grids according to the topology of the distribution network, and use each grid as a power supply partition;

[0106] S2: Use the 500kV substation in each power supply zone as a collection point to extract power production data, power consumption data, and power interaction data;

[0107] S3. Calculate the power CO2 emission factor of the current sink point based on the power production data, power consumption data, and power interaction data;

[0108] S4. Calculate the power CO2 emission factor of the current power supply zone based on the power CO2 emission factor of the current convergence point;

[0109] S5. Based on the topological relationship between the area to be calculated and the power supply partition, calculate the power CO2 emission factor of the area to be calculated according to the power CO2 emission factors of the relevant power supply partition.

[0110] Furthermore, in step S1, the power supply partitions do not overlap with each other, and each power supply partition realizes independent power supply. Each power supply partition supplies power to one or more areas, and each power supply partition includes a 500kV substation.

[0111] The “region” mentioned in this embodiment may be an administrative region.

[0112] Specifically, power supply zoning is based on grid-based distribution network planning, taking into account factors such as the grid structure, load demand, municipal planning, and land use characteristics of each power supply unit. The system divides the power supply area into non-intersecting grids, allowing each unit to independently supply power. Each power supply zone generally supplies power to one or more regions (administrative divisions). Some power supply zones cross regional (administrative division) boundaries, resulting in power interactions between different regions (administrative divisions) at voltage levels of 500 kV, 220 kV, and below.

[0113] Furthermore, in step S2, the power production data includes the power generation of grid-connected units of 500kV and above and the power generation of grid-connected units of 220kV and below, the power consumption data includes the power consumption of the power supply partition, and the power interaction data includes the power transferred to the aggregation point through the ultra-high voltage station / converter station, the power directly transferred to the aggregation point from other areas, and the power transferred from the aggregation points of other power supply partitions to the current aggregation point.

[0114] Specifically, power production data is obtained from the power production detailed report, power consumption data is obtained from the power consumption detailed report, and power interaction data can be obtained through the 500kV bus gateway. In addition, the power-supplying substation corresponding to the power-supplying substation within the power supply zone, the power-receiving substation, and the power-receiving substation corresponding to the power-receiving substation can also be obtained through the 500kV bus gateway, excluding the mutual power supply within the same power supply zone, that is, the interactive power when the power-supplying zone and the power-receiving zone are consistent.

[0115] Further, refer to Figure 2 In step S3, the electricity carbon dioxide emission factor of the current convergence point is calculated based on the electricity production data, electricity consumption data, and electricity interaction data, including:

[0116] S31. Calculate the direct carbon emissions of the 500 kV and above grid-connected units in the current power supply zone based on the power generation of the 500 kV and above grid-connected units at the current convergence point;

[0117] S32. Subtract the electricity consumption of the current power supply zone from the electricity transferred to the current aggregation point via the UHV station / converter station, the electricity directly transferred to the current aggregation point from other areas, and the electricity transferred to the current aggregation point from the aggregation points of other power supply zones to obtain the reverse power supply of the 220 kV and below grid-connected units in the current power supply zone. Calculate the carbon emissions of the 220 kV and below grid-connected units in the current power supply zone transferred to the current aggregation point based on the reverse power supply.

[0118] S33. Calculate the average carbon dioxide emission factor of the UHV station / converter station based on the amount of electricity transferred to the current convergence point via the UHV station / converter station and its source, and calculate the carbon emissions of electricity transferred to the current convergence point via the UHV station / converter station based on the average carbon dioxide emission factor of the UHV station / converter station;

[0119] S34. Calculate the average carbon dioxide emission factors of the corresponding other regions based on the amount of electricity directly transferred to the current aggregation point from other regions and its source, and calculate the carbon emissions of the other regions transferred to the current aggregation point based on the average carbon dioxide emission factors of the corresponding other regions;

[0120] S35. Calculate the carbon emissions from the sinking points of other power supply zones to the current sinking point based on the carbon dioxide emission factors of the electricity from the sinking points of other power supply zones and the amount of electricity transferred to the current sinking point;

[0121] S36. Calculate the electricity carbon dioxide emission factor for the current aggregation point based on the power generation and direct carbon emissions of 500kV and above grid-connected units at the current aggregation point, the reverse power generation and carbon emissions of 220kV and below grid-connected units in the current power supply section, the carbon emissions and power transferred into the current aggregation point from UHV stations / converter stations, the carbon emissions and power directly transferred into the current aggregation point from other areas, and the carbon emissions and power transferred into the current aggregation point from aggregation points in other power supply sections.

[0122] Specifically, in step S31, the carbon emission factor of the fuel is determined based on the energy type of the 500kV and above grid-connected units at the current convergence point. The data source is official statistics. The power generation of the 500kV and above grid-connected units at the current convergence point is multiplied by the carbon emission factor of the corresponding fuel to obtain the direct carbon emissions Em of the 500kV and above grid-connected units in the current power supply zone. 500,k .

[0123] Furthermore, in step S32, the calculated reverse power is used to determine the carbon emission factor of the fuel according to the energy type of the 220kV and below grid-connected units in the current power supply zone. The reverse power is multiplied by the carbon emission factor of the corresponding fuel to obtain the carbon emission amount Em of the 220kV and below grid-connected units in the current power supply zone transferred to the current convergence point. 220,kh .

[0124] Furthermore, in step S33, the amount of electricity transferred to the current aggregation point via the UHV station / converter station, that is, the amount of electricity indirectly transferred to the current aggregation point from other regions (which may be other administrative divisions), is used to calculate the average carbon dioxide emission factor of the UHV station / converter station based on the amount of electricity transferred to the current aggregation point via the UHV station / converter station and its source, including:

[0125] S331. Find the CO2 emission factor of the output zone of the electricity transferred to the current sinking point via the UHV station / converter station, multiply the CO2 emission factor of each output zone by the corresponding amount of electricity transferred to the current sinking point via the UHV station / converter station, and sum them to obtain the total carbon emissions transferred to the current sinking point via the UHV station / converter station;

[0126] S332. Calculate the sum of all electricity transferred to the current convergence point via the UHV station / converter station;

[0127] S333. The ratio of the total carbon emissions transferred to the current convergence point through the UHV station / converter station to the sum of all the electricity transferred to the current convergence point through the UHV station / converter station is used as the average carbon dioxide emission factor of the UHV station / converter station.

[0128] Specifically, it is assumed that the carbon dioxide emission factor of the output area q of the electricity transferred to the current convergence point through the UHV station / converter station is EF q (This data can be obtained from the official website of the output area), and the corresponding amount of electricity transferred to the current convergence point through the UHV station / converter station is E imp,qh,kh , then the total carbon emissions transferred to the current convergence point through the UHV station / converter station are The sum of all the electricity transferred to the current convergence point through the UHV station / converter station is , then the average carbon dioxide emission factor EF of the UHV station / converter station is qh for:

[0129] (1)

[0130] Among them, EF qh is the average carbon dioxide emission factor of UHV stations / converter stations, EF q is the carbon dioxide emission factor of the output area of ​​the electricity transferred to the current gathering point through the UHV station / converter station, E imp,qh,kh It refers to the amount of electricity transferred to the current gathering point through the UHV station / converter station.

[0131] Furthermore, in step S33, the average carbon dioxide emission factor EF of the UHV station / converter station is obtained. qh After that, it is combined with the amount of electricity E transferred to the current convergence point via the UHV station / converter station q imp,qh,kh Multiply and sum to obtain the total carbon emissions of all the energy transported through the UHV station / converter station to the current convergence point. .

[0132] Furthermore, in step S34, based on the amount of electricity directly transferred from other regions to the current convergence point and its source, the corresponding average carbon dioxide emission factors of other regions are calculated, including:

[0133] S341. Find the carbon dioxide emission factors of other regions corresponding to the amount of electricity directly transferred to the current sink point, multiply the carbon dioxide emission factors corresponding to each other region by the amount of electricity directly transferred to the current sink point, and sum them to obtain the total carbon emissions directly transferred from other regions to the current sink point.

[0134] S342. Calculate the sum of all electricity directly transferred from other areas to the current convergence point;

[0135] S343. The ratio of the total carbon emissions directly transferred from other regions to the current convergence point to the sum of all electricity directly transferred from the other regions to the current convergence point is used as the average carbon dioxide emission factor of the other regions.

[0136] Specifically, assuming that the amount of electricity directly transferred to the current convergence point corresponds to the carbon dioxide emission factor of other regions n is EF n (This data can be obtained from the official website of the corresponding formation area), and the amount of electricity directly transferred to the current convergence point from other areas is E imp,n,kh , then the total carbon emissions from all other regions directly transferred to the current sink point is , the total amount of electricity directly transferred to the current sink point from all other areas is , then the average carbon dioxide factor EF in other regions is avg for:

[0137] (2)

[0138] Among them, EF avg is the average carbon dioxide factor for other regions, EF n is the carbon dioxide emission factor of other regions n, E imp,n,kh The amount of electricity transferred from other areas to the current aggregation point.

[0139] Furthermore, in step S34, the average carbon dioxide emission factor EF of other regions is obtained. avg Then, transfer it and each other area to the current convergence point imp,n,kh Multiply and sum to get the total carbon emissions from all other regions transferred to the current sink point .

[0140] Furthermore, in step S35, the calculation method of the carbon dioxide emission factor of the electricity of the aggregation point of other power supply partitions is the same as step S3 in this embodiment, and the carbon dioxide emission factor of the electricity of the aggregation point of other power supply partitions is EF ih , the amount of electricity transferred from the aggregation points of other power supply partitions to the current aggregation point is The sum of carbon emissions from all other power supply districts’ sinks transferred to the sink is .

[0141] Furthermore, in step S36, the carbon dioxide emission factor of the electricity at the current convergence point is calculated, including:

[0142] S361, the direct carbon emissions Em of the grid-connected units of 500kV and above in the current power supply area 500,k , Carbon emissions Em of 220kV and below grid-connected units in the current power supply area transferred to the current aggregation point 220,kh , the sum of carbon emissions from all UHV stations / converter stations transferred to the current convergence point , the sum of carbon emissions from all other regions directly transferred to the current sink , the sum of carbon emissions from all other power supply districts’ sinking points transferred to the current sinking point Sum up and obtain the total carbon emissions at the current sink point;

[0143] S362, the power generation of the 500KV grid-connected units in the current power supply zone E 500,k , the reverse power supply E of the 220kV and below grid-connected units in the current power supply area 220,kh , the amount of electricity transferred from all UHV stations / converter stations to the current convergence point and , all other areas directly transferred to the current convergence point of electricity and , the amount of electricity transferred from all other power supply partitions to the current aggregation point and Add them together to obtain the total power of the current convergence point;

[0144] S363. The ratio of the total carbon emissions of the current convergence point to the total electricity consumption of the current convergence point is used as the electricity carbon dioxide emission factor of the current convergence point. The specific calculation formula is as follows:

[0145] ; (3)

[0146] Among them, EF kh The CO2 emission factor for electricity at the current sink, E5 00,k Indicates the power generation of the 500KV grid-connected units in the current power supply zone, E 220,kh Indicates the reverse power supply of 220kV and below grid-connected units in the current power supply area, E imp,qh,kh It represents the amount of electricity transferred to the current convergence point through the UHV station / converter station, q represents the number of UHV stations / converter stations, EF qh is the average carbon dioxide emission factor of UHV stations / converter stations, E imp,n,kh Indicates the amount of electricity directly transferred from other areas to the current convergence point, n indicates the number of other areas, EF avg is the average carbon dioxide emission factor for other regions, EF ih CO2 emission factors for electricity from aggregation points in other power supply sectors, It represents the amount of electricity transferred from the aggregation points of other power supply partitions to the current aggregation point, and i represents the number of aggregation points in other power supply partitions.

[0147] Further, refer to Figure 3 In step S4, the power CO2 emission factor of the current power supply partition is calculated based on the power CO2 emission factor of the current convergence point, including:

[0148] S41. Add the sum of the electricity transferred from all UHV stations / converter stations to the current convergence point, the sum of the electricity directly transferred from all other areas to the current convergence point, and the sum of the electricity transferred from the convergence points of all other power supply zones to the current convergence point to obtain the net sum of electricity transferred to the current convergence point;

[0149] S42. Multiplying the net transferred-in electricity of the current convergence point by the electricity carbon dioxide emission factor of the current convergence point to obtain the net transferred-in carbon emissions of the current convergence point;

[0150] S43. Calculate the direct carbon emissions of the 220 kV and below grid-connected units in the current power supply zone based on the power generation of the 220 kV and below grid-connected units in the current power supply zone;

[0151] S44. Add the net transferred carbon emissions of the current convergence point to the direct carbon emissions of the 220 kV and below grid-connected units in the current power supply zone to obtain the total carbon emissions of the current power supply zone;

[0152] S45. Add the net transferred electricity of the current convergence point to the generated electricity of the 220 kV and below grid-connected units in the current power supply zone to obtain the total electricity of the current power supply zone;

[0153] S46. Taking the ratio of the total carbon emissions of the current power supply partition to the total electricity consumption of the current power supply partition as the electricity carbon dioxide emission factor of the current power supply partition.

[0154] Specifically, in step S41, the amount of electricity transferred from all UHV stations / converter stations to the current convergence point and , all other areas directly transferred to the current convergence point of electricity and , the amount of electricity transferred from all other power supply partitions to the current aggregation point and Add them together to get the net inflow of electricity and E at the current convergence point. imp,kh .

[0155] Furthermore, in step S42, the net transfer power E of the current convergence point is imp,kh and the CO2 emission factor EF for electricity at the current point of concentration kh Multiply them to obtain the net transferred carbon emissions at the current sink point.

[0156] Furthermore, in step S43, according to the power generation E of the 220kV and below grid-connected units in the current power supply zone, 220,k Calculate the direct carbon emissions Em of 220kV and below grid-connected units in the current power supply zone 220,k , specifically calculated based on the carbon emission factor and power generation corresponding to the fuel type of 220kV and below grid-connected units.

[0157] Furthermore, in step S44, the net carbon emissions EF of the current convergence point kh *E imp,kh Compared with the direct carbon emissions Em of 220kV and below grid-connected units in the current power supply area 220,kAdd them together to obtain the total carbon emissions of the current power supply zone.

[0158] Furthermore, in step S45, the net transfer power of the current convergence point and E imp,kh Compared with the power generation of 220kV and below grid-connected units in the current power supply area, E 220,k Add them together to get the total power consumption of the current power supply partition.

[0159] Furthermore, in step S46, the electricity CO2 emission factor of the current power supply zone is calculated according to the following formula:

[0160] ; (4)

[0161] Among them, EF k represents the carbon dioxide emission factor of the electricity supply zone k, E imp,kh

[0162] Indicates the net inflow of electricity at the current convergence point, EF kh The CO2 emission factor of electricity at the aggregation point within the power supply zone, E 220,k Indicates the power generation of 220kV and below grid-connected units in the power supply zone, Em 220,k It indicates the direct carbon emissions of grid-connected units of 220 kV and below in the current power supply zone k.

[0163] Further, refer to Figure 4 In step S5, based on the topological relationship between the area to be calculated and the power supply partition, the power CO2 emission factor of the area to be calculated is calculated according to the power CO2 emission factors of the relevant power supply partition, including:

[0164] S51: Determine, within the to-be-calculated area, a first power supply partition that fully supplies power to the to-be-calculated area and a second power supply partition that supplies power to the to-be-calculated area and other areas;

[0165] S52: Compare the power consumption Ea of each first power supply partition with the power carbon dioxide emission factor EF of the corresponding first power supply partition. k,a After multiplication, sum up to obtain the carbon emissions of all first power supply zones ;

[0166] S53: The power consumption E of the second power supply zone in the area to be calculated imp,b,k The power generation of its 220kV and below grid-connected units E 220,b,k After adding, the corresponding second power supply area electricity carbon dioxide emission factor EF k,b Multiply them to get the carbon emissions of each second power supply zone, and add up the carbon emissions of all second power supply zones to get the carbon emissions of all second power supply zones. ;

[0167] S54. Add the carbon emissions of all first power supply zones and the carbon emissions of all second power supply zones to obtain the total carbon emissions of the area to be calculated: ;

[0168] S55, all the first power supply partitions E in the area to be calculated a Add up the power consumption of the first power supply partitions to obtain the total power consumption of all first power supply partitions ;

[0169] S56. Add the power consumption of each second power supply zone in the area to be calculated to the power generation of its 220 kV and below grid-connected units to obtain the power consumption of each second power supply zone. Add the power consumption of all second power supply zones to obtain the total power consumption of all second power supply zones. ;

[0170] S57. Add the total power consumption of all first power supply zones and the total power consumption of all second power supply zones to obtain the total power consumption of the area to be calculated;

[0171] S58. The ratio of the total carbon emissions of the area to be calculated to the total electricity consumption of the area to be calculated is used as the electricity carbon dioxide emission factor of the area to be calculated. The calculation formula is as follows:

[0172] ; (5)

[0173] Among them, EF xk represents the electricity CO2 emission factor of the region k to be calculated, a represents the number of the first power supply partition, b represents the number of the second power supply partition, E a Indicates the power consumption of the first power supply partition, EF k,a represents the electricity CO2 emission factor of the first power supply zone, E imp,b,k Indicates the power consumption of the second power supply section, E 220,b,k Indicates the power generation of 220kV and below grid-connected units in the second power supply section, EF k,b It represents the CO2 emission factor of electricity in the second power supply zone.

[0174] In some embodiments, reference Figure 5 , provides a device for calculating regional electricity carbon dioxide emission factors, comprising:

[0175] A division module 201 is configured to divide the power supply area into grids according to the topology of the distribution network, and use each obtained grid as a power supply partition;

[0176] Data extraction module 202, used to extract power production data, power consumption data and power interaction data using the 500kV substation in each power supply zone as a collection point;

[0177] The sink point calculation module 203 is used to calculate the power carbon dioxide emission factor of the current sink point based on the power production data, power consumption data and power interaction data;

[0178] A first calculation module 204 is configured to calculate the power CO2 emission factor of the current power supply zone based on the power CO2 emission factor of the current convergence point;

[0179] The second calculation module 205 is configured to calculate the power CO2 emission factor of the area to be calculated based on the topological relationship between the area to be calculated and the power supply partition and the power CO2 emission factors of the related power supply partition.

[0180] Furthermore, the power production data includes the power generation of grid-connected units of 500kV and above and the power generation of grid-connected units of 220kV and below, the power consumption data includes the power consumption of the power supply partition, and the power interaction data includes the power transferred to the aggregation point through the ultra-high voltage station / converter station, the power directly transferred to the aggregation point from other areas, and the power transferred from the aggregation points of other power supply partitions to the current aggregation point.

[0181] Furthermore, the sink point calculation module 203 calculates the power carbon dioxide emission factor of the current sink point based on the power production data, power consumption data, and power interaction data, including:

[0182] Calculate the direct carbon emissions of 500kV and above grid-connected units in the current power supply zone based on the power generation of 500kV and above grid-connected units at the current convergence point;

[0183] The electricity consumption of the current power supply zone is subtracted from the electricity transferred to the current aggregation point via the UHV station / converter station, the electricity directly transferred to the current aggregation point from other areas, and the electricity transferred to the current aggregation point from the aggregation points of other power supply zones. This yields the reverse power of the 220kV and below grid-connected units in the current power supply zone. The carbon emissions of the 220kV and below grid-connected units in the current power supply zone transferred to the current aggregation point are calculated based on this reverse power.

[0184] Calculate the average CO2 emission factor of the UHV / converter station based on the amount of electricity transferred to the current convergence point via the UHV / converter station and its source. Calculate the carbon emissions of electricity transferred to the current convergence point via the UHV / converter station based on the average CO2 emission factor of the UHV / converter station.

[0185] Calculate the average carbon dioxide emission factors of other regions based on the amount of electricity directly transferred to the current aggregation point from other regions and its sources, and calculate the carbon emissions of other regions transferred to the current aggregation point based on the average carbon dioxide emission factors of other regions;

[0186] Calculate the carbon emissions from the aggregation points in other power supply zones to the current aggregation point based on the carbon dioxide emission factors of the electricity from the aggregation points in other power supply zones and the amount of electricity transferred to the current aggregation point;

[0187] The electricity carbon dioxide emission factor of the current aggregation point is calculated based on the power generation and direct carbon emissions of 500kV and above grid-connected units at the current aggregation point, the reverse power supply of 220kV and below grid-connected units in the current power supply section and the carbon emissions transferred to the current aggregation point, the carbon emissions and power transferred from the UHV station / converter station to the current aggregation point, the carbon emissions and power directly transferred from other areas to the current aggregation point, and the carbon emissions and power transferred from aggregation points in other power supply sections to the current aggregation point.

[0188] Furthermore, the sink point calculation module 203 calculates the average carbon dioxide emission factor of the UHV station / converter station based on the amount of electricity transferred to the current sink point via the UHV station / converter station and its source, including:

[0189] Find the CO2 emission factor of the output area of ​​the electricity transferred to the current aggregation point through the UHV station / converter station, multiply the CO2 emission factor of each output area by the corresponding amount of electricity transferred to the current aggregation point through the UHV station / converter station, and sum them to obtain the total carbon emissions transferred to the current aggregation point through the UHV station / converter station;

[0190] Calculate the sum of all electricity transferred to the current convergence point through the UHV station / converter station;

[0191] The ratio of the total carbon emissions transferred to the current convergence point through the UHV station / converter station to the sum of all the electricity transferred to the current convergence point through the UHV station / converter station is used as the average carbon dioxide emission factor of the UHV station / converter station.

[0192] Furthermore, the sink point calculation module 203 calculates the corresponding average carbon dioxide emission factors of other areas based on the amount of electricity directly transferred to the current sink point from other areas and its source, including:

[0193] Find the carbon dioxide emission factors of other regions corresponding to the amount of electricity directly transferred to the current sink, multiply the carbon dioxide emission factors corresponding to each other region by the amount of electricity directly transferred to the current sink, and then sum them to obtain the total carbon emissions directly transferred from other regions to the current sink;

[0194] Calculate the sum of all electricity directly transferred from other areas to the current sink point;

[0195] The ratio of the total carbon emissions directly transferred from other regions to the current aggregation point to the sum of all electricity directly transferred from the other regions to the current aggregation point is used as the average carbon dioxide emission factor of the other regions.

[0196] Furthermore, the sink point calculation module 203 calculates and obtains the electricity carbon dioxide emission factor of the current sink point, including:

[0197] The total carbon emissions of the current sinking point are obtained by adding together the direct carbon emissions of 500kV and above grid-connected units in the current power supply zone, the carbon emissions of 220kV and below grid-connected units in the current power supply zone transferred to the current sinking point, the sum of the carbon emissions of all UHV stations / converter stations transferred to the current sinking point, the sum of the carbon emissions directly transferred to the current sinking point from all other areas, and the sum of the carbon emissions transferred to the current sinking point from sinking points in all other power supply zones.

[0198] The total power at the current convergence point is obtained by adding together the power generation of the 500kV grid-connected units in the current power supply zone, the reverse power of the 220kV and below grid-connected units in the current power supply zone, the sum of the power transferred to the current convergence point by all UHV stations / converter stations, the sum of the power directly transferred to the current convergence point by all other areas, and the sum of the power transferred to the current convergence point by the convergence points of all other power supply zones.

[0199] The ratio of the total carbon emissions of the current convergence point to the total electricity consumption of the current convergence point is used as the electricity carbon dioxide emission factor of the current convergence point.

[0200] Furthermore, the first calculation module 204 calculates the power CO2 emission factor of the current power supply partition based on the power CO2 emission factor of the current convergence point, including:

[0201] The sum of the electricity transferred to the current converging point from all UHV stations / converter stations, the sum of the electricity directly transferred to the current converging point from all other areas, and the sum of the electricity transferred to the current converging point from the converging points of all other power supply zones are added together to obtain the net sum of the electricity transferred to the current converging point.

[0202] Multiply the net transferred-in electricity of the current gathering point by the electricity CO2 emission factor of the current gathering point to obtain the net transferred-in carbon emissions of the current gathering point;

[0203] Calculate the direct carbon emissions of 220kV and below grid-connected units in the current power supply zone based on the power generation of 220kV and below grid-connected units in the current power supply zone;

[0204] Add the net transferred carbon emissions of the current convergence point to the direct carbon emissions of the 220kV and below grid-connected units in the current power supply zone to obtain the total carbon emissions of the current power supply zone;

[0205] Add the net inflow of electricity at the current convergence point to the generated electricity of the 220kV and below grid-connected units in the current power supply zone to obtain the total electricity of the current power supply zone;

[0206] The ratio of the total carbon emissions of the current power supply partition to the total electricity consumption of the current power supply partition is used as the electricity carbon dioxide emission factor of the current power supply partition.

[0207] Furthermore, the second calculation module 205 calculates the power CO2 emission factor of the area to be calculated based on the topological relationship between the area to be calculated and the power supply partition and the power CO2 emission factor of the relevant power supply partition, including:

[0208] Determine, within the area to be calculated, a first power supply partition that fully supplies power to the area to be calculated and a second power supply partition that supplies power to the area to be calculated and other areas;

[0209] Multiplying the electricity consumption of each first power supply zone by the corresponding electricity carbon dioxide emission factor of the first power supply zone, and then summing the results to obtain the carbon emissions of all first power supply zones;

[0210] The carbon emissions of each second power supply zone are obtained by adding the power consumption of the second power supply zone in the area to be calculated and the power generation of its 220kV and below grid-connected units. The carbon emissions of all second power supply zones are obtained by adding the carbon emissions of all second power supply zones.

[0211] Add the carbon emissions of all first power supply zones and the carbon emissions of all second power supply zones to obtain the total carbon emissions of the area to be calculated;

[0212] Adding the power consumption of all first power supply partitions in the area to be calculated to obtain the total power consumption of all first power supply partitions;

[0213] Add the power consumption of each second power supply zone in the area to be calculated to the power generation of its 220kV and below grid-connected units to obtain the power consumption of each second power supply zone. Add the power consumption of all second power supply zones to obtain the total power consumption of all second power supply zones.

[0214] Add the total power consumption of all first power supply zones and the total power consumption of all second power supply zones to obtain the total power consumption of the area to be calculated;

[0215] The ratio of the total carbon emissions of the area to be calculated to the total electricity consumption of the area to be calculated is used as the electricity carbon dioxide emission factor of the area to be calculated.

[0216] In some embodiments, a computer storage medium is further provided, wherein the computer storage medium stores a plurality of instructions, and the plurality of instructions can be read to execute the above method.

[0217] The method and device for calculating the regional power carbon dioxide emission factor provided in the above embodiment have at least the following beneficial effects:

[0218] (1) As the power supply structure of different power supply zones is quite different, power sources of different natures have different access voltage levels and different power generation capacities, the carbon emissions and power CO2 emission factors are calculated based on the power properties and weight ratios of the 500 kV power grid and the 220 kV and below power grids, which can fully reflect the power supply structure and electricity consumption characteristics and effectively improve the accuracy of the calculation of the power CO2 factor.

[0219] (2) The 500 kV substation within the power supply zone is regarded as the convergence point. With the power supply zone convergence point as the center, the convergence power and carbon factor of the convergence point are calculated. Then, the carbon factor of the 220 kV zone is calculated based on the power transmission from the 500 kV convergence point and the power generation of 220 kV and below. This can more scientifically reflect the actual operating characteristics of the power system.

[0220] (3) The electricity transferred from other regions to the current area to be calculated is generally transferred through three methods: converter stations, ultra-high voltage channels, and direct transfer. Considering the nature of external electricity serving the entire area, when calculating the electricity transferred from other regions, the power CO2 emission factor is uniformly taken as the weighted average of their power CO2 emission factors, which can better reflect the fairness of electricity use;

[0221] (4) Based on the power supply zoning, conducting research and calculation of regional power CO2 emission factors will greatly simplify the relevant work content and steps and more truly reflect the power interaction topology relationship.

[0222] Although preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they are aware of the basic inventive concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the invention. Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the invention. Thus, the present invention is intended to include such changes and modifications as fall within the scope of the claims and their equivalents.

Claims

1. A method for calculating regional electricity carbon dioxide emission factors, characterized in that: include: According to the topology of the distribution network, the power supply area is divided into grids, and each grid obtained is used as a power supply partition; The 500kV substation in each power supply zone is used as a collection point to extract power production data, power consumption data, and power interaction data; The carbon dioxide emission factor of the electricity at the current convergence point is calculated based on the power production data, power consumption data and power interaction data: the direct carbon emissions of the 500kV and above grid-connected units in the current power supply section are calculated based on the power generation of the 500kV and above grid-connected units at the current convergence point; the power consumption of the current power supply section is subtracted from the power transferred to the current convergence point via the UHV station / converter station, the power directly transferred to the current convergence point from other areas, and the power transferred to the current convergence point from the convergence points of other power supply sections, to obtain the reverse power of the 220kV and below grid-connected units in the current power supply section, and the carbon emissions of the 220kV and below grid-connected units in the current power supply section transferred to the current convergence point are calculated based on the reverse power; the average carbon dioxide emission factor of the UHV station / converter station is calculated based on the power transferred to the current convergence point via the UHV station / converter station and its source, and the power transferred to the current convergence point via the UHV station / converter station is calculated based on the average carbon dioxide emission factor of the UHV station / converter station The carbon emissions of the current aggregation point; based on the amount of electricity directly transferred to the current aggregation point from other areas and its source, calculate the corresponding average carbon dioxide emission factors of other areas, and calculate the carbon emissions of other areas transferred to the current aggregation point based on the corresponding average carbon dioxide emission factors of other areas; calculate the carbon emissions of aggregation points of other power supply zones transferred to the current aggregation point based on the power carbon dioxide emission factors of aggregation points of other power supply zones and the amount of electricity transferred to the current aggregation point; calculate the power carbon dioxide emission factor of the current aggregation point based on the power generation and direct carbon emissions of 500kV and above grid-connected units in the current power supply zone, the reverse power and carbon emissions transferred to the current aggregation point of 220kV and below grid-connected units in the current power supply zone, the carbon emissions and the amount of electricity transferred to the current aggregation point of UHV stations / converter stations, the carbon emissions and the amount of electricity directly transferred to the current aggregation point of other areas, and the carbon emissions and the amount of electricity transferred to the current aggregation point of aggregation points of other power supply zones; Calculate the electricity CO2 emission factor of the current power supply zone based on the electricity CO2 emission factor of the current aggregation point; Based on the topological relationship between the area to be calculated and the power supply partition, the power carbon dioxide emission factor of the area to be calculated is calculated according to the power carbon dioxide emission factors of the relevant power supply partition.

2. The method according to claim 1, characterized in that The power supply partitions do not overlap with each other, and each power supply partition realizes independent power supply, and each power supply partition supplies power to one or more areas.

3. The method according to claim 1, characterized in that The power production data includes the power generation of 500kV and above grid-connected units and the power generation of 220kV and below grid-connected units, the power consumption data includes the power consumption of the power supply partition, and the power interaction data includes the power transferred to the aggregation point through the ultra-high voltage station / converter station, the power directly transferred to the aggregation point from other areas, and the power transferred from the aggregation points of other power supply partitions to the current aggregation point.

4. The method according to claim 1, wherein Based on the amount of electricity transferred to the current convergence point through the UHV station / converter station and its source, the average CO2 emission factor of the UHV station / converter station is calculated, including: Find the CO2 emission factor of the output area of ​​the electricity transferred to the current aggregation point through the UHV station / converter station, multiply the CO2 emission factor of each output area by the corresponding amount of electricity transferred to the current aggregation point through the UHV station / converter station, and sum them to obtain the total carbon emissions transferred to the current aggregation point through the UHV station / converter station; Calculate the sum of all electricity transferred to the current convergence point through the UHV station / converter station; The ratio of the total carbon emissions transferred to the current convergence point through the UHV station / converter station to the sum of all the electricity transferred to the current convergence point through the UHV station / converter station is used as the average carbon dioxide emission factor of the UHV station / converter station.

5. The method according to claim 1, wherein Based on the amount of electricity directly transferred from other regions to the current aggregation point and its source, calculate the corresponding average carbon dioxide emission factors of other regions, including: Find the carbon dioxide emission factors of other regions corresponding to the amount of electricity directly transferred to the current sink, multiply the carbon dioxide emission factors corresponding to each other region by the amount of electricity directly transferred to the current sink, and then sum them to obtain the total carbon emissions directly transferred from other regions to the current sink; Calculate the sum of all electricity directly transferred from other areas to the current sink point; The ratio of the total carbon emissions directly transferred from other regions to the current aggregation point to the sum of all electricity directly transferred from the other regions to the current aggregation point is used as the average carbon dioxide emission factor of the other regions.

6. The method according to claim 1, characterized in that Calculate the current electricity CO2 emission factor for the current aggregation point, including: The total carbon emissions of the current sinking point are obtained by adding together the direct carbon emissions of 500kV and above grid-connected units in the current power supply zone, the carbon emissions of 220kV and below grid-connected units in the current power supply zone transferred to the current sinking point, the sum of the carbon emissions of all UHV stations / converter stations transferred to the current sinking point, the sum of the carbon emissions directly transferred to the current sinking point from all other areas, and the sum of the carbon emissions transferred to the current sinking point from sinking points in all other power supply zones. The total power at the current convergence point is obtained by adding together the power generation of the 500kV grid-connected units in the current power supply zone, the reverse power of the 220kV and below grid-connected units in the current power supply zone, the sum of the power transferred to the current convergence point by all UHV stations / converter stations, the sum of the power directly transferred to the current convergence point by all other areas, and the sum of the power transferred to the current convergence point by the convergence points of all other power supply zones. The ratio of the total carbon emissions of the current convergence point to the total electricity consumption of the current convergence point is used as the electricity carbon dioxide emission factor of the current convergence point.

7. The method according to claim 1, characterized in that Based on the electricity CO2 emission factor of the current aggregation point, calculate the electricity CO2 emission factor of the current power supply zone, including: The sum of the electricity transferred to the current converging point from all UHV stations / converter stations, the sum of the electricity directly transferred to the current converging point from all other areas, and the sum of the electricity transferred to the current converging point from the converging points of all other power supply zones are added together to obtain the net sum of the electricity transferred to the current converging point. Multiply the net transferred-in electricity of the current gathering point by the electricity CO2 emission factor of the current gathering point to obtain the net transferred-in carbon emissions of the current gathering point; Calculate the direct carbon emissions of 220kV and below grid-connected units in the current power supply zone based on the power generation of 220kV and below grid-connected units in the current power supply zone; Add the net transferred carbon emissions of the current convergence point to the direct carbon emissions of the 220kV and below grid-connected units in the current power supply zone to obtain the total carbon emissions of the current power supply zone; Add the net inflow of electricity at the current convergence point to the generated electricity of the 220kV and below grid-connected units in the current power supply zone to obtain the total electricity of the current power supply zone; The ratio of the total carbon emissions of the current power supply partition to the total electricity consumption of the current power supply partition is used as the electricity carbon dioxide emission factor of the current power supply partition.

8. The method according to claim 1, characterized in that Based on the topological relationship between the area to be calculated and the power supply zone, the power CO2 emission factor of the area to be calculated is calculated according to the power CO2 emission factors of the relevant power supply zones, including: Determine, within the area to be calculated, a first power supply partition that fully supplies power to the area to be calculated and a second power supply partition that supplies power to the area to be calculated and other areas; Multiplying the electricity consumption of each first power supply zone by the corresponding electricity carbon dioxide emission factor of the first power supply zone, and then summing the results to obtain the carbon emissions of all first power supply zones; The carbon emissions of each second power supply zone are obtained by adding the power consumption of the second power supply zone in the area to be calculated and the power generation of its 220kV and below grid-connected units. The carbon emissions of all second power supply zones are obtained by adding the carbon emissions of all second power supply zones. Add the carbon emissions of all first power supply zones and the carbon emissions of all second power supply zones to obtain the total carbon emissions of the area to be calculated; Adding the power consumption of all first power supply partitions in the area to be calculated to obtain the total power consumption of all first power supply partitions; Add the power consumption of each second power supply zone in the area to be calculated to the power generation of its 220kV and below grid-connected units to obtain the power consumption of each second power supply zone. Add the power consumption of all second power supply zones to obtain the total power consumption of all second power supply zones. Add the total power consumption of all first power supply zones and the total power consumption of all second power supply zones to obtain the total power consumption of the area to be calculated; The ratio of the total carbon emissions of the area to be calculated to the total electricity consumption of the area to be calculated is used as the electricity carbon dioxide emission factor of the area to be calculated.

9. A device for calculating regional power carbon dioxide emission factors, characterized in that: include: A partitioning module is used to divide the power supply area into grids according to the topology of the distribution network, and use each obtained grid as a power supply partition; The data extraction module is used to extract power production data, power consumption data, and power interaction data using the 500kV substation in each power supply zone as a collection point; The convergence point calculation module is used to calculate the power carbon dioxide emission factor of the current convergence point based on the power production data, power consumption data and power interaction data: calculate the direct carbon emissions of the 500kV and above grid-connected units in the current power supply section based on the power generation of the 500kV and above grid-connected units at the current convergence point; subtract the power consumption of the current power supply section from the power transferred to the current convergence point through the UHV station / converter station, the power directly transferred to the current convergence point from other areas, and the power transferred to the current convergence point from the convergence points of other power supply sections, to obtain the reverse power of the 220kV and below grid-connected units in the current power supply section, and calculate the carbon emissions of the 220kV and below grid-connected units in the current power supply section transferred to the current convergence point based on the reverse power; calculate the average carbon dioxide emission factor of the UHV station / converter station based on the power transferred to the current convergence point through the UHV station / converter station and its source, and calculate the power transferred through the UHV station / converter station based on the average carbon dioxide emission factor of the UHV station / converter station The carbon emissions of electricity entering the current aggregation point; based on the amount of electricity directly transferred to the current aggregation point from other regions and its source, calculate the corresponding average carbon dioxide emission factors of other regions, and calculate the carbon emissions of other regions transferred to the current aggregation point based on the corresponding average carbon dioxide emission factors of other regions; calculate the carbon emissions of aggregation points of other power supply zones transferred to the current aggregation point based on the power carbon dioxide emission factors of aggregation points of other power supply zones and the amount of electricity transferred to the current aggregation point; calculate the power carbon dioxide emission factor of the current aggregation point based on the power generation and direct carbon emissions of 500kV and above grid-connected units in the current power supply zone, the reverse power and carbon emissions transferred to the current aggregation point of 220kV and below grid-connected units in the current power supply zone, the carbon emissions and the amount of electricity transferred to the current aggregation point of UHV stations / converter stations, the carbon emissions and the amount of electricity directly transferred to the current aggregation point of other regions, and the carbon emissions and the amount of electricity transferred to the current aggregation point of aggregation points of other power supply zones; A first calculation module is used to calculate the power carbon dioxide emission factor of the current power supply zone based on the power carbon dioxide emission factor of the current convergence point; The second calculation module is used to calculate the power carbon dioxide emission factor of the area to be calculated based on the topological relationship between the area to be calculated and the power supply partition and the power carbon dioxide emission factor of the relevant power supply partition.

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