Power system carbon emission factor dynamic correction method, device, equipment and medium

Abstract

The invention discloses a power system carbon emission factor dynamic correction method and device, equipment and a medium, and relates to the technical field of power grids, and the method comprises the steps: determining an initial carbon emission factor of a current target region based on the on-grid electric quantity information, carbon emission information, an adjacent region set and inter-region exchange power information corresponding to the target region; based on the non-on-grid electric quantity information corresponding to the target area and the adjacent area set, correcting the initial carbon emission factor to determine a corrected carbon emission factor corresponding to the target area; correcting the corrected carbon emission factors based on a preset hierarchy correction strategy for sub-regions corresponding to different hierarchies in the target region so as to determine target carbon emission factors corresponding to the current sub-regions; the different levels comprise a plurality of preset administrative division levels and terminal user levels. According to the method, the accuracy, precision and reliability of carbon emission factor calculation can be improved, so that inter-region carbon responsibility transfer can be dynamically tracked.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power grid, in particular to a power system carbon emission factor dynamic correction method, device, equipment and medium. BACKGROUND

[0002] The existing power carbon emission factor determination scheme mainly adopts the average carbon emission factor method and the power flow tracking method based on carbon emission flow theory.

[0003] Among them, the average carbon emission factor method faces the whole region, and defaults that the power consumption of all users in the region has the same carbon intensity, but its result is static or low-frequency updated, the time and space granularity is relatively coarse, and it cannot respond to fine-grained changes; the power flow tracking method based on carbon emission flow theory forcibly stipulates that the power of the inflow node is mixed in a fixed proportion and then distributed responsibility, which fails to depict the real dynamic response mechanism of the power grid, lacks physical basis, and its implementation of global unified solution as a whole has considerable theoretical and practical calculation difficulty. In addition, the above two methods ignore the proportion of the off-grid part, which will lead to the uncertainty of the carbon reduction contribution measurement of the off-grid power, and affect the accuracy of the determined carbon emission factor. SUMMARY

[0004] Therefore, the purpose of the present application is to provide a power system carbon emission factor dynamic correction method, device, equipment and medium, which can improve the accuracy, precision and reliability of carbon emission factor calculation, so as to dynamically track the carbon responsibility transfer between regions. The specific scheme is as follows:

[0005] In the first aspect, the present application provides a power system carbon emission factor dynamic correction method, comprising:

[0006] Based on the on-grid power information, carbon emission information, adjacent region set and inter-regional exchange power information corresponding to the target region, an initial carbon emission factor of the target region is determined;

[0007] Based on the off-grid power information corresponding to the target region and the adjacent region set, the initial carbon emission factor is corrected to determine the corrected carbon emission factor corresponding to the target region;

[0008] Based on the off-grid power information corresponding to the target region and the adjacent region set, the initial carbon emission factor is corrected to determine the corrected carbon emission factor corresponding to the target region;

[0009] Optionally, the initial carbon emission factor of the target region is determined based on the online power information, the carbon emission information, the adjacent region set and the inter-regional exchanged power information corresponding to the target region, and the initial carbon emission factor of the target region is determined based on the online power information, the carbon emission information, the first unit set, the adjacent region set and the inter-regional exchanged power information corresponding to the target region.

[0010] The first unit set is a set of power generating units participating in local online power output, and the adjacent region set is a set of regions adjacent to the target region and having power injection to the target region.

[0011] The online power information and the carbon emission information corresponding to the online power information corresponding to the target region are obtained.

[0012] The initial carbon emission factor of the target region is determined based on the online power information, the carbon emission information, the first unit set, the adjacent region set and the inter-regional exchanged power information corresponding to the target region.

[0013] Optionally, the initial carbon emission factor is corrected based on the online power information and the adjacent region set corresponding to the target region to determine the corrected carbon emission factor corresponding to the target region.

[0014] The second unit set corresponding to the target region is obtained; the second unit set is a set of power generating units not participating in local online power output.

[0015] The power carbon emission factor corresponding to the non-online power is determined based on the second unit set.

[0016] The initial carbon emission factor is corrected based on the second unit set, the power carbon emission factor corresponding to the non-online power, the adjacent region set and the sent-out power information corresponding to the target region to determine the corrected carbon emission factor corresponding to the target region.

[0017] Optionally, the corrected carbon emission factor is corrected based on a preset level correction strategy for each sub-region corresponding to a different level in the target region to determine a target carbon emission factor corresponding to each sub-region.

[0018] For any provincial sub-region in the target region, the corrected carbon emission factor is corrected based on the power source type set corresponding to the current provincial sub-region, the provincial injection power, the first adjacent sub-region set and the first non-online power information to determine a first target carbon emission factor corresponding to the current provincial sub-region.

[0019] For the sub-regions of the target region, the trunk lines are selected based on the topological structure information of the municipal power transmission network and a preset pruning recursive algorithm, and each of the municipal sub-regions is recursively corrected by using the corresponding trunk line selection result, the exchanged power information between the sub-regions, the second off-grid power information and the corrected carbon emission factor, so as to determine the second target carbon emission factor corresponding to each of the municipal sub-regions.

[0020] For any terminal user level sub-region in the target region, the third target carbon emission factor corresponding to the terminal user level sub-region is determined by correcting the target municipal sub-region where the terminal user level sub-region is located and the corresponding third off-grid power information.

[0021] Optionally, the correction of the corrected carbon emission factor based on the power source type set corresponding to the current provincial sub-region, the provincial injection power, the first adjacent sub-region set and the first off-grid power information comprises:

[0022] The provincial injection power corresponding to the current provincial sub-region is distinguished based on the power source type set, so as to determine a distinction result; the provincial injection power comprises in-provincial on-grid power and off-provincial injection power;

[0023] The generator set carbon emission factors of different power generation types in the current provincial sub-region are determined based on the distinction result;

[0024] The first adjacent sub-region set corresponding to the current provincial sub-region is obtained;

[0025] The corrected carbon emission factor is corrected based on the first off-grid power information corresponding to the current provincial sub-region, the generator set carbon emission factor and the generator set carbon emission factors corresponding to each of the provincial sub-regions in the first adjacent sub-region set, so as to determine the first target carbon emission factor corresponding to the current provincial sub-region.

[0026] Optionally, the selection of the trunk lines based on the topological structure information of the municipal power transmission network and the preset pruning recursive algorithm, and the recursive correction of each of the municipal sub-regions by using the corresponding trunk line selection result, the exchanged power information between the sub-regions, the second off-grid power information and the corrected carbon emission factor, comprise:

[0027] Each of the municipal sub-regions is taken as a network node, the power transmission relationship is taken as a directed edge, and the transmission power is taken as a weight, so as to construct a municipal power transmission network;

[0028] The topological structure information corresponding to the municipal power transmission network is extracted;

[0029] Based on the topology information and the preset pruning recursive algorithm, the backbone route is selected and pruned to determine the backbone route selection result.

[0030] Based on the selection results of the main trunk line, a reference sub-region on the main trunk line is selected to determine the target reference sub-region; the target reference sub-region is the prefecture-level sub-region with zero on-grid electricity, a known carbon emission factor, and located at the end or beginning of the main trunk line.

[0031] Based on the second set of adjacent sub-regions corresponding to the target benchmark sub-region and the power exchange information between the sub-regions, an influence factor corresponding to each of the prefecture-level sub-regions in the second set of adjacent sub-regions is determined; the influence factor is used to represent the degree of influence of the grid-connected electricity of the adjacent prefecture-level sub-regions on the carbon emission factor of the target benchmark sub-region.

[0032] Starting from the target benchmark sub-region, the preliminary carbon emission factors of each of the prefecture-level sub-regions are recursively determined based on the influencing factors and the corrected carbon emission factors.

[0033] For any of the aforementioned prefecture-level sub-regions, based on the preliminary carbon emission factor and the second non-grid electricity information corresponding to the current prefecture-level sub-region, the second target carbon emission factor corresponding to the current prefecture-level sub-region is determined.

[0034] Optionally, the correction based on the target city-level sub-region where the current terminal user-level sub-region is located and the corresponding third non-networked electricity information includes:

[0035] Obtain the preliminary carbon emission factor of the target city-level sub-region where the current end-user-level sub-region is located, in order to determine the target preliminary carbon emission factor;

[0036] Based on the target preliminary carbon emission factor, the third non-grid electricity information corresponding to the current end-user level sub-region, the third unit set and the fourth unit set, the third target carbon emission factor corresponding to the current end-user level sub-region is determined;

[0037] The third set of generator sets is the set of generator sets that have already connected to the internet and are participating in the current terminal user-level sub-area power output; the fourth set of generator sets is the set of generator sets that have not participated in the current terminal user-level sub-area power output.

[0038] Secondly, this application provides a dynamic correction device for carbon emission factors in a power system, comprising:

[0039] The initial factor determination module is used to determine the initial carbon emission factor of the target area based on the grid-connected electricity information, carbon emission information, adjacent area set and inter-regional power exchange information corresponding to the target area.

[0040] The first correction module is configured to correct the initial carbon emission factor based on the non-networked power information corresponding to the target region and the adjacent region set, to determine a corrected carbon emission factor corresponding to the target region.

[0041] The second correction module is configured to correct the corrected carbon emission factor based on a preset hierarchical correction strategy for each sub-region corresponding to a different level in the target region, to determine a target carbon emission factor corresponding to each of the sub-regions.

[0042] In a third aspect, the present application provides an electronic device, comprising:

[0043] The memory is configured to store a computer program.

[0044] The processor is configured to execute the computer program to implement the steps of the power system carbon emission factor dynamic correction method.

[0045] In a fourth aspect, the present application provides a computer readable storage medium configured to store a computer program, which is executed by a processor to implement the steps of the power system carbon emission factor dynamic correction method.

[0046] In the present application, the initial carbon emission factor of the target region is determined based on the networked power information, the carbon emission information, the adjacent region set, and the inter-regional exchanged power information of the target region. The initial carbon emission factor is corrected based on the non-networked power information corresponding to the target region and the adjacent region set, to determine a corrected carbon emission factor corresponding to the target region. The corrected carbon emission factor is corrected based on a preset hierarchical correction strategy for each sub-region corresponding to a different level in the target region, to determine a target carbon emission factor corresponding to each of the sub-regions. The different levels include a plurality of preset administrative division levels and a terminal user level. That is, in the present application, the initial carbon emission factor of the target region is first determined based on the inter-regional exchanged power information, and then the initial carbon emission factor is corrected based on the non-networked power information corresponding to the target region, to determine a corrected carbon emission factor corresponding to the target region. Then, the corrected carbon emission factor is corrected based on a preset hierarchical correction strategy for each sub-region corresponding to a different level in the target region, to determine a target carbon emission factor corresponding to each of the sub-regions. In this way, the accuracy, precision, and reliability of the carbon emission factor calculation can be improved, so that the carbon responsibility transfer between regions can be dynamically tracked. BRIEF DESCRIPTION OF DRAWINGS

[0047] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0048] Figure 1 A flowchart of a method for dynamic correction of carbon emission factors in a power system is provided in this application;

[0049] Figure 2 This application provides a specific flowchart for the dynamic correction of carbon emission factors in power systems.

[0050] Figure 3 A schematic diagram of a dynamic correction device for carbon emission factors in a power system is provided in this application;

[0051] Figure 4 This application provides a structural diagram of an electronic device. Detailed Implementation

[0052] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0053] Existing schemes for determining the carbon emission factor in the power grid mainly employ the average carbon emission factor method and the power flow tracing method based on carbon emission flow theory. The average carbon emission factor method is regional in scope, assuming all users within the region have the same carbon intensity in their electricity consumption. However, its results are static or updated infrequently, with coarse spatiotemporal granularity, failing to respond to fine-grained changes. The power flow tracing method based on carbon emission flow theory, at its core (assuming a 'proportional sharing principle'), forcibly stipulates that the electricity flowing into nodes is mixed in a fixed proportion before responsibility is allocated. This fails to characterize the real dynamic response mechanism of the power grid, lacks a physical basis, and treats the power grid as a whole, presenting considerable theoretical and practical computational challenges for achieving a globally unified solution. Furthermore, both of the aforementioned methods ignore the proportion of electricity not connected to the grid, leading to ambiguity in the measurement of the carbon reduction contribution of off-grid electricity and affecting the accuracy of the determined carbon emission factor.

[0054] To this end, this application provides a dynamic correction scheme for carbon emission factors in power systems, which can improve the accuracy, precision and reliability of carbon emission factor calculation, thereby enabling dynamic tracking of carbon responsibility transfer between regions.

[0055] SeeFigure 1 As shown in the figure, an embodiment of the present invention discloses a method for dynamic correction of carbon emission factors in power systems, comprising:

[0056] Step S11: Based on the grid-connected electricity information, carbon emission information, adjacent area set and inter-regional power exchange information corresponding to the target area, determine the initial carbon emission factor of the target area.

[0057] In this embodiment, combined with Figure 2 As shown, firstly, considering inter-regional power exchange, a preliminary carbon emission factor is determined. Inter-regional power exchange refers to the total electrical energy actually flowing bidirectionally or unidirectionally between two adjacent or electrically connected regions via transmission lines within a specific time period. Specifically, this involves acquiring the first set of generating units corresponding to the current target region, the set of adjacent regions, and the inter-regional power exchange information corresponding to the adjacent regions. The first set of generating units is the set of generating units participating in local grid-connected power output, and the set of adjacent regions is the set of regions adjacent to the target region and providing power injection to it. Next, the grid-connected electricity information and the corresponding carbon emission information for the current target region are acquired. Based on the grid-connected electricity information, the carbon emission information, the first set of generating units, the set of adjacent regions, and the inter-regional power exchange information for the target region, the initial carbon emission factor for the current target region is determined.

[0058] Specifically, in determining the initial carbon emission factor, only inter-regional electricity exchange is considered, while temporarily ignoring the electricity not yet connected to the grid within a region. As defined by the electricity carbon emission factor, the electricity carbon emission factor... The carbon emission factor for electricity, which takes into account regional electricity exchange, is obtained by dividing the region's total carbon emissions (E) by the region's total electricity consumption (G). :

[0059] ;

[0060] Where G represents the amount of electricity transmitted or generated; E represents the total carbon emissions; and the set It is a collection of all the local units that are already connected to the internet and contributing power. for The set of The power generation corresponding to each unit for The set of Carbon emission factors corresponding to each unit; collection It is a set of regions connected to the target region and receiving power from it. For set Inner Power transmission in each region For set Inner Even if the initial carbon emission factor for a region needs to be corrected to account for regional electricity exchange, it can still recursively find a definite node with no regional electricity exchange (or very little exchange, which can be approximated as negligible) as the source, thus achieving a recursive solution. This constitutes the core of the recursion in this embodiment. In this way, the carbon emission intensity generated by inter-regional electricity interaction is quantitatively assessed, improving the accuracy of carbon emission factor calculation. This provides a more precise basis for the division of regional carbon emission responsibilities, and solves the shortcomings of the average carbon emission factor method, such as coarse spatiotemporal granularity and neglect of off-grid electricity, thereby improving accuracy.

[0061] Step S12: Based on the non-grid electricity information corresponding to the target area and the set of adjacent areas, the initial carbon emission factor is corrected to determine the corrected carbon emission factor corresponding to the target area.

[0062] Specifically, after determining the initial carbon emission factor, this embodiment will perform a preliminary carbon emission factor correction, taking into account the non-grid-connected electricity in the region. The non-grid-connected electricity information refers to electricity generated by low-power, highly dispersed micro-distributed power generation equipment, consumed locally within the region, and not monitored by the power grid. Examples include electricity generated by user-built photovoltaic systems, power plant self-consumption (plant power), and line losses during transmission and distribution. This portion of electricity increases with the increase of distributed resources such as self-built photovoltaic systems, and can already influence the magnitude of the regional carbon emission factor. That is, a second set of generating units corresponding to the current target region is obtained; the second set of generating units is a set of generating units that have not participated in local grid-connected power output; the electricity carbon emission factor corresponding to the non-grid-connected electricity is determined based on the second set of generating units; based on the second set of generating units, the electricity carbon emission factor corresponding to the non-grid-connected electricity, the set of adjacent regions, and the transmitted electricity information corresponding to the current target region, the initial carbon emission factor is corrected to determine the corrected carbon emission factor corresponding to the target region.

[0063] Understandably, in determining the revised carbon emission factor, the amount of electricity not connected to the grid in the region will be considered, thus correcting the initial carbon emission factor calculated in the first point. Since all the electricity not connected to the grid in the region is consumed locally, the resulting environmental benefits should all be attributed to the target region, resulting in a revised electricity carbon emission factor that takes into account the amount of electricity not connected to the grid. :

[0064] ;

[0065] Where G represents the amount of electricity transmitted or generated; and E represents the total carbon emissions. This refers to the collection of all generator sets that are not connected to the internet within the target area. Power transmission information for the target area; For set The power generation of the k-th unit; For set The carbon emission factor of the kth unit is calculated based on the actual emission factor of each power plant or the average factor of the unit type. This serves as the initial carbon emission factor for the target area. In this way, the off-grid electricity generated by renewable energy units, primarily photovoltaic units, is measured, reflecting the emission reduction contribution of low-carbon units and encouraging users to adopt more low-carbon electricity.

[0066] Step S13: For each sub-region corresponding to a different level in the target region, the modified carbon emission factor is corrected based on a preset level correction strategy to determine the target carbon emission factor corresponding to each sub-region; the different levels include several preset administrative division levels and end-user levels.

[0067] Combination Figure 2 As shown, in this embodiment, after determining the corrected carbon emission factor, the carbon emission factor will be corrected again for several preset administrative division levels and end-user level sub-regions in the target area to determine the target carbon emission factor for each sub-region. That is, for any provincial sub-region in the target area, the corrected carbon emission factor is corrected based on the current set of electricity source types, provincial injected electricity, first set of adjacent sub-regions, and first non-grid electricity information to determine the first target carbon emission factor corresponding to the current provincial sub-region; for the prefecture-level sub-regions in the target area, based on the prefecture-level... The power transmission network topology information and a preset pruning recursive algorithm are used to select the backbone lines. The backbone line selection results, inter-regional power exchange information, second non-grid electricity information, and the corrected carbon emission factor are used to recursively correct each of the prefecture-level sub-regions to determine the second target carbon emission factor corresponding to each prefecture-level sub-region. For any end-user-level sub-region within the target region, corrections are made based on the target prefecture-level sub-region where the current end-user-level sub-region is located and the corresponding third non-grid electricity information to determine the third target carbon emission factor corresponding to the current end-user-level sub-region.

[0068] Furthermore, regarding the process of determining the target carbon emission factor corresponding to a provincial sub-region, firstly, the provincial injected electricity corresponding to the current provincial sub-region is distinguished based on the set of electricity source types to determine the distinction result; the provincial injected electricity includes electricity already connected to the grid within the province and electricity injected from other provinces; then, based on the distinction result, the carbon emission factors of generator units of different power generation types within the current provincial sub-region are determined; a first set of adjacent sub-regions corresponding to the current provincial sub-region is obtained; based on the first non-grid-connected electricity information corresponding to the current provincial sub-region, the generator unit carbon emission factors, and the generator unit carbon emission factors corresponding to each provincial sub-region in the first set of adjacent sub-regions, the modified carbon emission factor is corrected to determine the first target carbon emission factor corresponding to the current provincial sub-region. Here, the provincial sub-region includes all grid-connected generator units, transmission and distribution networks within the sub-region, and metering points at the interconnection points of adjacent provincial power grids. The specific correction process is as follows:

[0069] (1) Differentiate the injected electricity from the province. Specifically, the electricity already supplied to the grid by the current provincial sub-region is distinguished from the electricity injected by other provincial sub-regions according to the type of electricity source (such as hydropower, thermal power, wind power, photovoltaic, etc.), and the average carbon emission factor of each generator unit is obtained based on known benchmark data, so as to provide a basis for subsequent correction.

[0070] (2) Preliminary carbon emission factors for sub-regional electricity exchange in provincial sub-regions for:

[0071] ;

[0072] In the formula, This refers to the set of provincial sub-regions connected to the current provincial sub-region. The type of electricity injected into the power plant (hydropower, thermal power, wind power, photovoltaic power, etc.); This refers to the collection of all generator units currently connected to the grid within the provincial sub-region; Outside of the current provincial sub-regions, The set of Carbon emission factor of generating units corresponding to different power types; For each type of electricity consumption The set of Carbon emission factors for individual generating units, adjusted carbon emission factors based on the target region. Sure; For the first Power generation of each unit; For the first Injected electricity volume in each provincial sub-region; for The set of The first sub-region injection Battery level type.

[0073] (3) After statistically analyzing the carbon emission factors of all non-grid-connected electricity and their source units in the current provincial sub-region, the carbon emission factor correction result of the current provincial sub-region is the first target carbon emission factor corresponding to the current provincial sub-region. As shown below:

[0074] ;

[0075] In the formula, This provides information on the power outflow from the current provincial sub-region. This refers to the set of all generator sets that are not currently connected to the grid within the current provincial sub-region; For set The power generation of the k-th unit; For set The carbon emission factor of the kth unit is calculated based on the actual emission factor of each power plant or the average factor of the unit type. The preliminary carbon emission factor for the current provincial sub-region determined in step (2).

[0076] Regarding the process of determining the target carbon emission factor for each prefecture-level sub-region, each prefecture-level sub-region is treated as a network node, power transmission relationships as directed edges, and transmitted electricity as weights to construct a prefecture-level power transmission network. The topology information corresponding to the prefecture-level power transmission network is extracted. Based on the topology information and a preset pruning recursive algorithm, backbone lines are selected and pruned to determine the backbone line selection result. Based on the backbone line selection result, a reference sub-region on the backbone line is selected to determine the target reference sub-region. The target reference sub-region is the prefecture-level sub-region with zero on-grid electricity, a known carbon emission factor, and located at the end or beginning of the backbone line. Based on the target reference... The second set of adjacent sub-regions corresponding to the sub-region and the power exchange information between the sub-regions are used to determine the influence factor corresponding to each of the prefecture-level sub-regions in the second set of adjacent sub-regions. The influence factor is used to represent the degree of influence of the grid-connected electricity of the adjacent prefecture-level sub-regions on the carbon emission factor of the target benchmark sub-region. Taking the target benchmark sub-region as the starting point, the preliminary carbon emission factor of each prefecture-level sub-region is recursively determined based on the influence factor and the corrected carbon emission factor. For any prefecture-level sub-region, the second target carbon emission factor corresponding to the current prefecture-level sub-region is determined based on the preliminary carbon emission factor and the second non-grid-connected electricity information corresponding to the current prefecture-level sub-region. The prefecture-level sub-region includes all generating units within the sub-region and key 220kV and above high-voltage transmission nodes based on the power grid physical structure and administrative division. This embodiment uses a branch-cutting recursive method to obtain the carbon emission factor of each prefecture-level node considering regional power exchange. Based on the differences in the composition of grid-connected electricity sources in various regions (such as the proportion of fossil fuel and renewable energy generation), their local carbon emission factors change dynamically due to different power generation structures, and form a cascading impact on the carbon emission factors of related regions through inter-regional power interaction networks. The calculation process is as follows:

[0077] (1) Select the main route and determine the preliminary carbon emission factor of the prefecture-level sub-region.

[0078] a. Construct a regional power transmission network. First, model all prefecture-level sub-regions as nodes, and model power transmission relationships as directed edges with weights equal to the transmitted power. Second, extract the network topology and identify the following characteristics: tree-like backbone: chain-like or radial sub-networks without loops; key hubs: nodes with high degree (connecting multiple regions) or large transmitted power; isolated nodes: regions with zero power connected to the grid or very little interaction.

[0079] b. Backbone route selection and pruning. The selection criteria for the backbone are: prioritize subnetworks with a tree-like structure (no loops); select paths with a high percentage of transmitted power (e.g., cumulatively accounting for more than 80% of the total network); and select regions with fewer interactions with other regions (low-degree nodes) as the starting point of the backbone.

[0080] For non-core areas, if their impact weight on the core area (e.g., transmitted electricity × carbon emission factor) is lower than a threshold (this threshold is determined based on the complexity of the power grid topology), their corrective impact is temporarily ignored. Areas on the core lines and high-impact areas directly connected to them are retained.

[0081] c. Determining the benchmark area. Select 1-2 benchmark areas on the main line, which must meet the following requirements: zero (or negligible) electricity generation, known carbon emission factors, and located at the end or beginning of the main line for easy one-way derivation.

[0082] d. Iterative correction of carbon emission factors. Starting from the baseline region, using the known carbon emission factors and combined with the transmitted electricity, the correction factors for adjacent regions are calculated. Assuming that the (N+1)th prefecture-level sub-region only receives input from the Nth prefecture-level region, the preliminary carbon emission factor for the (N+1)th prefecture-level sub-region can be solved as follows:

[0083] ;

[0084] In the formula, This is the preliminary carbon emission factor for the N+1th prefecture-level sub-region; The amount of electricity injected from the Nth prefecture-level sub-region into the (N+1)th prefecture-level sub-region; The initial carbon emission factor for the Nth prefecture-level sub-region; This is the set of all generator sets that are connected to the internet within the (N+1)th prefecture-level sub-region; for The set of Power generation of each unit; for The set of Carbon emission factors for individual generating units, adjusted carbon emission factors based on the target region. Confirmed. Based on this, the preliminary carbon emission factor for considering electricity exchange between sub-regions within a prefecture-level city can be solved recursively.

[0085] (2) The preliminary carbon emission factors for the prefecture-level sub-regions are revised as follows:

[0086] ;

[0087] In the formula, any prefecture-level sub-region, i.e., the nth prefecture-level sub-region, is taken as the current prefecture-level sub-region. The preliminary carbon emission factor for the current prefecture-level sub-region determined in step (1); This is the second target carbon emission factor for the current prefecture-level sub-regions; This refers to the set of prefecture-level sub-regions that are connected to the current prefecture-level sub-region. This refers to the collection of all generator sets currently connected to the grid within the prefecture-level sub-region; This refers to the collection of all generator sets that are not currently connected to the internet within the prefecture-level sub-region; This provides information on the power outflow from the current prefecture-level sub-region. For set The power generation of the k-th unit; For set The carbon emission factor of the kth unit is calculated based on the actual emission factor of each power plant or the average factor of the unit type. for The set of Power generation of each unit; for The set of The injected electricity volume of each prefecture-level sub-region.

[0088] Regarding the process of determining the target carbon emission factor corresponding to the end-user level sub-region, the preliminary carbon emission factor of the target prefecture-level sub-region where the current end-user level sub-region is located is obtained to determine the target preliminary carbon emission factor; based on the target preliminary carbon emission factor, the third non-grid-connected electricity information, the third generator set, and the fourth generator set corresponding to the current end-user level sub-region, the third target carbon emission factor corresponding to the current end-user level sub-region is determined; wherein, the third generator set is the set of generator sets participating in the grid-connected power output of the current end-user level sub-region; the fourth generator set is the set of generator sets not participating in the grid-connected power output of the current end-user level sub-region. The end-user level sub-region includes industrial parks, commercial complexes, and user power access points. This embodiment ignores the power interaction of the end-user level sub-region; when calculating the preliminary carbon emission factor of the end-user level sub-region, the preliminary carbon emission factor obtained when considering regional power exchange in the prefecture-level sub-region where it is located is directly used. Therefore, to correct the carbon emission factor of the end-user level sub-region, it is only necessary to... Based on this, the average carbon emission factor of the non-grid electricity and its corresponding generating units in this terminal user-level sub-region is statistically analyzed, as shown below:

[0089] ;

[0090] In the formula, This is the third target carbon emission factor for the current end-user level sub-region; The initial carbon emission factor for the prefecture-level sub-region where the current end-user-level sub-region is located; The set of terminal user-level sub-regions connected to the current terminal user-level sub-region; This is the set of all generator sets currently connected to the internet within the current end-user level sub-region; This refers to the set of all generator sets that are not connected to the internet within the current end-user level sub-region; This refers to the power output information sent to the current end-user level sub-region. For set The power generation of the k-th unit; For set The carbon emission factor of the kth unit is calculated based on the actual emission factor of each power plant or the average factor of the unit type. for The set of Power generation of each unit; for The set of Injected power in each end-user level sub-region.

[0091] In summary, this embodiment refines the target area into three levels and provides corresponding carbon emission factor correction processes for each level. In actual implementation, the above correction schemes can be directly adopted for different correction objectives. Addressing the infeasibility of power flow tracing calculations and the neglect of distributed resources, this embodiment employs a hierarchical pruning architecture. Provincial-level sub-regions are directly calculated, city-level sub-regions undergo topology pruning (main path selection + influence weight threshold), and end-user-level sub-regions combine inheritance and correction. This significantly reduces computational complexity. Furthermore, through an independent accounting mechanism for off-grid electricity, the carbon reduction contribution of distributed clean energy is fully attributed to the local area, avoiding the problem of neglecting environmental benefits.

[0092] Therefore, this application first determines the initial carbon emission factor of the current target region based on inter-regional electricity exchange information. Then, it corrects the initial carbon emission factor based on the off-grid electricity information corresponding to the target region to determine the corrected carbon emission factor for the target region. Subsequently, for each sub-region corresponding to different levels within the target region, a preset hierarchical correction strategy is used to further correct the corrected carbon emission factor to determine the target carbon emission factor for each sub-region. This improves the accuracy, precision, and reliability of carbon emission factor calculation, thereby enabling dynamic tracking of inter-regional carbon responsibility transfer.

[0093] See Figure 3 As shown in the illustration, this application also discloses a dynamic correction device for carbon emission factors in a power system, comprising:

[0094] The initial factor determination module 11 is used to determine the initial carbon emission factor of the target area based on the grid-connected electricity information, carbon emission information, adjacent area set and inter-regional power exchange information corresponding to the target area.

[0095] The first correction module 12 is used to correct the initial carbon emission factor based on the off-grid electricity information corresponding to the target area and the set of adjacent areas, so as to determine the corrected carbon emission factor corresponding to the target area.

[0096] The second correction module 13 is used to correct the corrected carbon emission factor based on a preset hierarchical correction strategy for sub-regions corresponding to different levels in the target region, so as to determine the target carbon emission factor corresponding to each sub-region; the different levels include several preset administrative division levels and end-user levels.

[0097] In some specific embodiments, the initial factor determination module 11 can be used to: obtain a first set of generating units, a set of adjacent regions, and inter-regional power exchange information corresponding to the current target area; the first set of generating units is a set of generating units that have already been put into the grid locally, and the set of adjacent regions is a set of regions that are adjacent to the target area and have power injection into the target area; obtain the grid-connected power information and carbon emission information corresponding to the grid-connected power information corresponding to the current target area; and determine the initial carbon emission factor of the current target area based on the grid-connected power information, the carbon emission information, the first set of generating units, the set of adjacent regions, and the inter-regional power exchange information corresponding to the target area.

[0098] In some specific embodiments, the first correction module 12 may be used to: obtain a second set of generating units corresponding to the current target area; the second set of generating units is a set of generating units that have not participated in local grid-connected power output; determine the electricity carbon emission factor corresponding to the electricity not connected to the grid based on the second set of generating units; and correct the initial carbon emission factor based on the second set of generating units, the electricity carbon emission factor corresponding to the electricity not connected to the grid, the set of adjacent areas, and the power output information corresponding to the current target area, so as to determine the corrected carbon emission factor corresponding to the target area.

[0099] In some specific embodiments, the second correction module 13 can be specifically used to: for any provincial sub-region in the target region, based on the set of electricity source types, provincial injected electricity, first adjacent sub-region set, and first non-grid electricity information corresponding to the current provincial sub-region, correct the corrected carbon emission factor to determine the first target carbon emission factor corresponding to the current provincial sub-region; for any prefecture-level sub-region in the target region, based on the topology information of the prefecture-level power transmission network and a preset pruning recursive algorithm, select the backbone line, and recursively correct each prefecture-level sub-region using the corresponding backbone line selection results, inter-sub-region exchanged power information, second non-grid electricity information, and the corrected carbon emission factor to determine the second target carbon emission factor corresponding to each prefecture-level sub-region; for any end-user level sub-region in the target region, correct based on the target prefecture-level sub-region where the current end-user level sub-region is located and the corresponding third non-grid electricity information to determine the third target carbon emission factor corresponding to the current end-user level sub-region.

[0100] In some specific embodiments, the second correction module 13 can be specifically used to: distinguish the provincial injected electricity corresponding to the current provincial sub-region based on the set of electricity source types to determine the distinction result; the provincial injected electricity includes electricity already connected to the grid within the province and electricity injected from other provinces; determine the carbon emission factor of generator sets of different power generation types within the current provincial sub-region based on the distinction result; obtain the first set of adjacent sub-regions corresponding to the current provincial sub-region; and correct the corrected carbon emission factor based on the first non-grid-connected electricity information corresponding to the current provincial sub-region, the generator set carbon emission factor, and the generator set carbon emission factor corresponding to each provincial sub-region in the first set of adjacent sub-regions, to determine the first target carbon emission factor corresponding to the current provincial sub-region.

[0101] In some specific embodiments, the second correction module 13 can be specifically used to: construct a city-level power transmission network by taking each of the prefecture-level sub-regions as network nodes, power transmission relationships as directed edges, and transmitted power as weights; extract the topology information corresponding to the city-level power transmission network; perform backbone line selection and pruning based on the topology information and a preset pruning recursive algorithm to determine the backbone line selection result; select a reference sub-region on the backbone line based on the backbone line selection result to determine the target reference sub-region; the target reference sub-region is the city-level sub-region with zero on-grid power, a known carbon emission factor, and located at the end or beginning of the backbone line; based on the target The second set of adjacent sub-regions corresponding to the benchmark sub-region and the exchange of electricity information between sub-regions are used to determine the influence factor corresponding to each of the prefecture-level sub-regions in the second set of adjacent sub-regions. The influence factor is used to represent the degree of influence of the on-grid electricity of the adjacent prefecture-level sub-regions on the carbon emission factor of the target benchmark sub-region. Taking the target benchmark sub-region as the starting point, the preliminary carbon emission factor of each prefecture-level sub-region is recursively determined based on the influence factor and the corrected carbon emission factor. For any prefecture-level sub-region, the second target carbon emission factor corresponding to the current prefecture-level sub-region is determined based on the preliminary carbon emission factor and the second off-grid electricity information corresponding to the current prefecture-level sub-region.

[0102] In some specific embodiments, the second correction module 13 can be specifically used to: obtain the preliminary carbon emission factor of the target prefecture-level sub-region where the current terminal user-level sub-region is located, so as to determine the target preliminary carbon emission factor; based on the target preliminary carbon emission factor, the third non-grid electricity information corresponding to the current terminal user-level sub-region, the third generator set and the fourth generator set, determine the third target carbon emission factor corresponding to the current terminal user-level sub-region; wherein, the third generator set is the set of generator sets that have participated in the grid-connected power output of the current terminal user-level sub-region; the fourth generator set is the set of generator sets that have not participated in the grid-connected power output of the current terminal user-level sub-region.

[0103] Furthermore, embodiments of this application also disclose an electronic device, Figure 4 This is a structural diagram of an electronic device 20 according to an exemplary embodiment. The content of the diagram should not be construed as limiting the scope of this application.

[0104] Figure 4This is a schematic diagram of the structure of an electronic device 20 provided in an embodiment of this application. Specifically, the electronic device 20 may include: at least one processor 21, at least one memory 22, a power supply 23, a communication interface 24, an input / output interface 25, and a communication bus 26. The memory 22 stores a computer program, which is loaded and executed by the processor 21 to implement the relevant steps in the dynamic correction method for carbon emission factors of power systems disclosed in any of the foregoing embodiments. Furthermore, the electronic device 20 in this embodiment may specifically be an electronic computer.

[0105] In this embodiment, the power supply 23 is used to provide operating voltage for each hardware device on the electronic device 20; the communication interface 24 can create a data transmission channel between the electronic device 20 and external devices, and the communication protocol it follows can be any communication protocol applicable to the technical solution of this application, and is not specifically limited here; the input / output interface 25 is used to acquire external input data or output data to the outside world, and its specific interface type can be selected according to specific application needs, and is not specifically limited here.

[0106] In addition, the memory 22, as a carrier for resource storage, can be a read-only memory, random access memory, disk or optical disk, etc. The resources stored thereon can include operating system 221, computer program 222, etc., and the storage method can be temporary storage or permanent storage.

[0107] The operating system 221 is used to manage and control the various hardware devices on the electronic device 20 and the computer program 222, which may be Windows Server, Netware, Unix, Linux, etc. In addition to including a computer program capable of performing the dynamic correction method for the carbon emission factor of the power system executed by the electronic device 20 as disclosed in any of the foregoing embodiments, the computer program 222 may further include computer programs capable of performing other specific tasks.

[0108] Furthermore, this application also discloses a computer-readable storage medium for storing a computer program; wherein, when the computer program is executed by a processor, it implements the aforementioned method for dynamically correcting the carbon emission factor of a power system. Specific steps of this method can be found in the corresponding content disclosed in the foregoing embodiments, and will not be repeated here.

[0109] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section.

[0110] Those skilled in the art will further recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0111] The steps of the methods or algorithms described in conjunction with the embodiments disclosed herein can be implemented directly by hardware, a software module executed by a processor, or a combination of both. The software module can be located in random access memory (RAM), main memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art.

[0112] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0113] The technical solutions provided in this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A method for dynamic correction of carbon emission factors in power systems, characterized in that, include: Based on the grid-connected electricity information, carbon emission information, neighboring region set, and inter-regional power exchange information corresponding to the target region, the initial carbon emission factor of the current target region is determined. Based on the non-grid electricity information corresponding to the target area and the set of adjacent areas, the initial carbon emission factor is corrected to determine the corrected carbon emission factor corresponding to the target area. For each sub-region corresponding to a different level in the target region, the corrected carbon emission factor is adjusted based on a preset level correction strategy to determine the target carbon emission factor corresponding to each sub-region. The different levels include several preset administrative division levels and end-user levels.

2. The method for dynamic correction of carbon emission factors in power systems according to claim 1, characterized in that, The determination of the initial carbon emission factor for the target area based on the grid-connected electricity information, carbon emission information, neighboring area set, and inter-regional electricity exchange information corresponding to the target area includes: Obtain the first set of generating units, the set of adjacent areas, and the inter-regional power exchange information corresponding to the set of adjacent areas corresponding to the current target area; the first set of generating units is the set of generating units that have already been connected to the grid and are participating in local power output, and the set of adjacent areas is the set of areas that are adjacent to the target area and have power injection into the target area; Obtain the electricity consumption information and carbon emission information corresponding to the electricity consumption information in the target area; Based on the grid-connected electricity information, carbon emission information, the first set of generating units, the set of adjacent regions, and the inter-regional power exchange information corresponding to the target region, the initial carbon emission factor of the current target region is determined.

3. The method for dynamic correction of carbon emission factors in power systems according to claim 1, characterized in that, The step of correcting the initial carbon emission factor based on the off-grid electricity information corresponding to the target area and the set of adjacent areas to determine the corrected carbon emission factor corresponding to the target area includes: Obtain the second set of generating units corresponding to the target area; the second set of generating units is the set of generating units that have not participated in local grid-connected power output; The carbon emission factor of electricity corresponding to the electricity not connected to the grid is determined based on the second set of generating units; Based on the second set of generating units, the carbon emission factor corresponding to the unconnected electricity, the set of adjacent regions, and the current electricity transmission information corresponding to the target region, the initial carbon emission factor is corrected to determine the corrected carbon emission factor corresponding to the target region.

4. The method for dynamic correction of carbon emission factors in power systems according to any one of claims 1 to 3, characterized in that, The step of revising the modified carbon emission factor based on a preset hierarchical correction strategy for sub-regions corresponding to different levels in the target region to determine the target carbon emission factor corresponding to each sub-region at the current time includes: For any provincial sub-region in the target region, the modified carbon emission factor is modified based on the set of electricity source types, provincial injected electricity, first adjacent sub-region set, and first non-grid electricity information corresponding to the current provincial sub-region, so as to determine the first target carbon emission factor corresponding to the current provincial sub-region. For the prefecture-level sub-regions in the target area, the main lines are selected based on the topology information of the prefecture-level power transmission network and the preset pruning recursive algorithm. The main lines are selected based on the results, the power exchange information between sub-regions, the second non-grid power information and the corrected carbon emission factor. The prefecture-level sub-regions are then recursively corrected to determine the second target carbon emission factor corresponding to each prefecture-level sub-region. For any terminal user-level sub-region in the target area, the third target carbon emission factor corresponding to the current terminal user-level sub-region is determined by correcting the target city-level sub-region where the current terminal user-level sub-region is located and the corresponding third non-grid electricity information.

5. The method for dynamic correction of carbon emission factors in power systems according to claim 4, characterized in that, The process of correcting the modified carbon emission factor based on the current provincial sub-region's corresponding set of electricity source types, provincial injected electricity, first adjacent sub-region set, and first non-grid-connected electricity information includes: The provincial injected electricity is distinguished based on the set of electricity source types to determine the distinction result; the provincial injected electricity includes electricity already connected to the grid within the province and electricity injected from other provinces. Based on the differentiation results, determine the carbon emission factors of generator units of different power generation types within the current provincial sub-region; Get the set of the first adjacent sub-regions corresponding to the current provincial sub-region; Based on the first non-grid electricity information corresponding to the current provincial sub-region, the generator carbon emission factor, and the generator carbon emission factor corresponding to each provincial sub-region in the first adjacent sub-region set, the modified carbon emission factor is corrected to determine the first target carbon emission factor corresponding to the current provincial sub-region.

6. The method for dynamic correction of carbon emission factors in power systems according to claim 4, characterized in that, The process involves selecting backbone lines based on the topology information of the prefecture-level power transmission network and a preset pruning recursive algorithm. Using the backbone line selection results, inter-regional power exchange information, second non-grid-connected power information, and the corrected carbon emission factor, recursively correcting each prefecture-level sub-region, including: Each of the aforementioned prefecture-level sub-regions is used as a network node, the power transmission relationship is used as a directed edge, and the transmitted power is used as the weight to construct a prefecture-level power transmission network. Extract the topology information corresponding to the municipal-level power transmission network; Based on the topology information and the preset pruning recursive algorithm, the backbone route is selected and pruned to determine the backbone route selection result. Based on the selection results of the main trunk line, a reference sub-region on the main trunk line is selected to determine the target reference sub-region; the target reference sub-region is the prefecture-level sub-region with zero on-grid electricity, a known carbon emission factor, and located at the end or beginning of the main trunk line. Based on the second set of adjacent sub-regions corresponding to the target benchmark sub-region and the power exchange information between the sub-regions, an influence factor corresponding to each of the prefecture-level sub-regions in the second set of adjacent sub-regions is determined; the influence factor is used to represent the degree of influence of the grid-connected electricity of the adjacent prefecture-level sub-regions on the carbon emission factor of the target benchmark sub-region. Starting from the target benchmark sub-region, the preliminary carbon emission factors of each of the prefecture-level sub-regions are recursively determined based on the influencing factors and the corrected carbon emission factors. For any of the aforementioned prefecture-level sub-regions, based on the preliminary carbon emission factor and the second non-grid electricity information corresponding to the current prefecture-level sub-region, the second target carbon emission factor corresponding to the current prefecture-level sub-region is determined.

7. The method for dynamic correction of carbon emission factors in power systems according to claim 6, characterized in that, The correction based on the target city-level sub-region where the current terminal user-level sub-region is located and the corresponding third non-networked power consumption information includes: Obtain the preliminary carbon emission factor of the target city-level sub-region where the current end-user-level sub-region is located, in order to determine the target preliminary carbon emission factor; Based on the target preliminary carbon emission factor, the third non-grid electricity information corresponding to the current end-user level sub-region, the third unit set and the fourth unit set, the third target carbon emission factor corresponding to the current end-user level sub-region is determined; The third set of generator sets is the set of generator sets that have already connected to the internet and are participating in the current terminal user-level sub-area power output; the fourth set of generator sets is the set of generator sets that have not participated in the current terminal user-level sub-area power output.

8. A dynamic correction device for carbon emission factors in a power system, characterized in that, include: The initial factor determination module is used to determine the initial carbon emission factor of the target area based on the grid-connected electricity information, carbon emission information, adjacent area set and inter-regional power exchange information corresponding to the target area. The first correction module is used to correct the initial carbon emission factor based on the off-grid electricity information corresponding to the target area and the set of adjacent areas, so as to determine the corrected carbon emission factor corresponding to the target area. The second correction module is used to correct the corrected carbon emission factor based on a preset hierarchical correction strategy for sub-regions corresponding to different levels in the target region, so as to determine the target carbon emission factor corresponding to each sub-region at the present time. The different levels include several preset administrative division levels and end-user levels.

9. An electronic device, characterized in that, include: Memory, used to store computer programs; A processor for executing the computer program to implement the dynamic correction method for carbon emission factors of power systems as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, Used to store a computer program, which, when executed by a processor, implements the dynamic correction method for carbon emission factors in power systems as described in any one of claims 1 to 7.

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