Carbon emission flow analysis method and device considering power trading contracts

Abstract

The present application discloses a method and device for analyzing carbon emission flows under power trading contracts, wherein the method includes: splitting a single node based on the power grid operation flow data and the performance of the power contract to obtain a split result; based on the split result, constructing equivalent power plants and equivalent loads for both the supply and demand sides of the contract, and constructing equivalent transmission lines for partially occupied transmission lines; and based on the equivalent transmission lines, calculating the corresponding flow of the equivalent lines of the target medium- and long-term power contracts, and correcting the original carbon emission flow calculation results according to the flow to obtain the equivalent carbon emissions of all load electricity in the target area. Thus, the technical problem that the related technology is based on the traditional carbon emission flow theory and cannot perform effective carbon emission analysis under large-scale power trading contracts and has poor applicability is solved.

Description

Technical Field

[0001] The present application relates to the technical field of power system operation, and in particular to a method and device for analyzing carbon emission flows under power trading contracts. Background Art

[0002] In the electricity market, power plants and consumers often enter into bilateral power purchase and sales contracts. Signing a power purchase and sales agreement through a power contract effectively stipulates that a portion of the power plant's generated electricity will be directly transmitted to a specific electricity user. Green power trading, a new transaction type within the medium- and long-term power market framework, operates in a similar format to bilateral power purchase and sales contracts. By matching the production and consumption of clean energy, it identifies power users willing to assume greater social responsibility and allows them to enter into direct transactions with wind and photovoltaic power generation projects. Green power trading rationally distributes the costs of absorbing new energy from a market perspective, effectively mitigating the cost increases caused by renewable energy on the traditional power system.

[0003] In recent years, with growing environmental awareness, domestic and international businesses have increasingly demanded green electricity. Some have set goals of achieving 100% green electricity production within the next decade or so. Export companies also hope to enhance the competitiveness of their products by consuming green electricity, leading to a gradual expansion in the scale of green electricity trading. Meanwhile, alongside green electricity trading, traditional energy generation remains the mainstream form of power generation, and companies not participating in green electricity trading still need to calculate their electricity-equivalent carbon emissions.

[0004] At present, the accounting schemes of related technologies are mainly divided into two categories:

[0005] The first type is national and regional carbon accounting, which mainly calculates the total annual carbon emissions within a region. However, this method is not applicable to large-scale cross-regional electricity transportation.

[0006] The second category is to use carbon emission flow theory to use carbon emissions as a label for electricity flow, and to achieve synchronous measurement of the flow of equivalent carbon emissions during the electricity flow process. However, the carbon emission flow theory of related technologies is based on the assumption of equal distribution of regional carbon emission intensity, which is inconsistent with the purpose of cross-regional green electricity trading.

[0007] In summary, the applicability of relevant technologies is poor and they are unable to effectively analyze carbon emissions under large-scale electricity trading contracts, and they are in urgent need of improvement. Summary of the Invention

[0008] This application provides a carbon emission flow analysis method and device considering power trading contracts to solve the technical problem that related technologies are based on traditional carbon emission flow theory and cannot perform effective carbon emission analysis under large-scale power trading contracts and have poor applicability.

[0009] The first aspect of the present application provides a method for analyzing carbon emission flows under power trading contracts, including the following steps: splitting a single node based on power grid operation flow data and power contract performance to obtain a split result; based on the split result, constructing equivalent power plants and equivalent loads for both the supply and demand sides of the contract, and constructing equivalent transmission lines for partially occupied transmission lines; and based on the equivalent transmission lines, calculating the corresponding flow of the equivalent lines of the target medium- and long-term power contract, and correcting the original carbon emission flow calculation result according to the flow to obtain the equivalent carbon emissions of all load electricity in the target area.

[0010] Optionally, in one embodiment of the present application, based on the splitting result, equivalent power plants and equivalent loads are constructed for both the supply and demand sides of the contract, and equivalent transmission lines are constructed for partially occupied transmission lines, including: in the processing of the contract unit, multiple first virtual nodes are added to the original single node, virtual power sources are set in the transmission line, the units used for transmission are converted into virtual power sources, and are set at the initial port of the transmission channel, or the contract unit capacity equivalent to the green power contract is converted into a virtual group, and is set at the initial port of the transmission channel; in the processing of the equivalent load, the original single node is added to the virtual power source, and the virtual power source is set at the initial port of the transmission channel. Add multiple second virtual nodes, set virtual loads at the end of the input line, set the contracted load at the end of the input channel, or convert the load capacity equivalent to the green electricity contract into a virtual load and set it at the end of the transmission channel; in the processing of the interconnection line between the virtual node and the equivalent node, the power interconnection line between the virtual node and the equivalent node is not modeled, or a power interconnection line is modeled, wherein the power flow of the interconnection line is 0; in the equivalent process of the direct supply virtual line, an equivalent modeling scheme for the direct supply virtual line is established; in the adjustment process of the bidirectional power transmission channel, a bidirectional contract unit and a bidirectional line are established.

[0011] Optionally, in one embodiment of the present application, the calculation of the corresponding flow of the equivalent line of the target medium- and long-term power contract includes: obtaining at least one of the load carbon potential, node carbon potential, and line carbon flow based on the data of the contract unit, contract load, and virtual line.

[0012] Optionally, in one embodiment of the present application, the calculation formula for equivalent carbon emissions per unit electricity consumption of all loads in the target area is:

[0013]

[0014] Where i is a node, is the load of node i, is the carbon emission intensity per unit of electricity consumption at node i.

[0015] The second aspect of the present application provides a carbon emission flow analysis device considering an electricity trading contract, including: a splitting module, which is used to split a single node based on the power grid operation flow data and the power contract performance to obtain a splitting result; a construction module, which is used to construct equivalent power plants and equivalent loads for the supply and demand sides of the contract based on the splitting result, and to construct equivalent transmission lines for partially occupied transmission lines; and an analysis module, which is used to calculate the corresponding flow of the equivalent line of the target medium- and long-term electricity contract based on the equivalent transmission line, and correct the original carbon emission flow calculation result according to the flow to obtain the equivalent carbon emissions of all load electricity in the target area.

[0016] Optionally, in one embodiment of the present application, the construction module includes: a first virtual node, in the process of processing the contract unit, multiple first virtual nodes are added to the original single node, a virtual power supply is set in the transmission line, the unit used for transmission is converted into a virtual power supply, and is set at the initial port of the transmission channel, or the capacity of the contract unit equivalent to the green power contract is converted into a virtual group, and is set at the initial port of the transmission channel; a second virtual node, in the process of processing the equivalent load, multiple second virtual nodes are added to the original single node, a virtual load is set at the end of the input line, and the The contracted load is set at the end of the input channel, or the load capacity equivalent to the green electricity contract is converted into a virtual load and set at the end of the transmission channel; the processing unit is used to not model the power interconnection line between the virtual node and the equivalent node, or to model the power interconnection line, wherein the power flow of the interconnection line is 0; the modeling unit is used to establish an equivalent modeling scheme for the direct supply virtual line in the equivalent process of the direct supply virtual line; the adjustment unit is used to establish a bidirectional contract unit and a bidirectional line in the adjustment process of the bidirectional power transmission channel.

[0017] Optionally, in one embodiment of the present application, the analysis module includes: an acquisition unit, used to acquire at least one of load carbon potential, node carbon potential, and line carbon flow based on data of contract units, contract loads, and virtual lines.

[0018] Optionally, in one embodiment of the present application, the calculation formula for equivalent carbon emissions per unit electricity consumption of all loads in the target area is:

[0019]

[0020] Where i is a node, is the load of node i, is the carbon emission intensity per unit of electricity consumption at node i.

[0021] The third aspect of the present application provides an electronic device, comprising: a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the processor executes the program to implement the carbon emission flow analysis method under the power trading contract as described in the above embodiment.

[0022] The fourth aspect of the present application provides a computer-readable storage medium having a computer program stored thereon, which is executed by a processor to implement the carbon emission flow analysis method under the power trading contract as described in any one of claims 1-5.

[0023] The embodiment of the present application can, based on the traditional carbon emission flow theory, be based on the power grid operation flow data and the performance of the power contract, and introduce equivalent nodes and lines to correct the traditional carbon emission measurement results, thereby obtaining the equivalent carbon emissions of all load power in the target area. Taking the power contract into consideration, it can effectively measure the carbon emission flow in the power system, verify the user's medium- and long-term electricity equivalent carbon emissions, and achieve fair, accurate and equivalent carbon emission measurement under power trading, with high applicability. Therefore, it solves the technical problem that the related technology is based on the traditional carbon emission flow theory and cannot conduct effective carbon emission analysis under large-scale power trading contracts, and has poor applicability.

[0024] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0026] Figure 1 A flowchart of a method for analyzing carbon emission flows under a power trading contract according to an embodiment of the present application;

[0027] Figure 2 A schematic diagram of the principle of contract units and equivalent load modeling according to a carbon emission flow analysis method under a power trading contract in accordance with one embodiment of the present application;

[0028] Figure 3 A schematic diagram of node connections for a direct virtual line modeling approach considering a carbon emission flow analysis method under an electricity trading contract according to one embodiment of the present application;

[0029] Figure 4 A schematic diagram of node connections of a bidirectional power transmission channel according to a method for analyzing carbon emission flows under a power trading contract in accordance with one embodiment of the present application;

[0030] Figure 5 A flowchart of a method for analyzing carbon emission flows under a power trading contract according to one embodiment of the present application;

[0031] Figure 6 This is a schematic structural diagram of a device for analyzing carbon emission flows under a power trading contract according to an embodiment of the present application;

[0032] Figure 7 A schematic diagram of the structure of an electronic device provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0033] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0034] The following describes the carbon emission flow analysis method and device under the power trading contract of the embodiment of the present application with reference to the accompanying drawings. In view of the technical problem that the related technology mentioned in the background technology center is based on the traditional carbon emission flow theory, it is impossible to perform effective carbon emission analysis under large-scale power trading contracts, and the applicability is poor, the present application provides a carbon emission flow analysis method under power trading contracts. In this method, on the basis of the traditional carbon emission flow theory, based on the power grid operation flow data and the power contract performance, the traditional carbon emission measurement results can be corrected by introducing equivalent nodes and lines, so as to obtain the equivalent carbon emissions of all load power in the target area. Under the consideration of the power contract, the carbon emission flow in the power system can be effectively measured, and the user's medium- and long-term electricity equivalent carbon emissions can be verified, so as to achieve fair, accurate and equivalent carbon emission measurement under power trading, and the applicability is high. Therefore, the technical problem that the related technology is based on the traditional carbon emission flow theory, it is impossible to perform effective carbon emission analysis under large-scale power trading contracts, and the applicability is poor is solved.

[0035] Specifically, Figure 1 A flowchart of a carbon emission flow analysis method considering a power trading contract provided in an embodiment of the present application.

[0036] like Figure 1 As shown, the carbon emission flow analysis method under the power trading contract includes the following steps:

[0037] In step S101, a single node is split based on the power grid operation flow data and the power contract performance status to obtain a split result.

[0038] During the actual implementation process, the embodiment of the present application can obtain the network topology structure, power system flow data, green electricity contract transaction volume and node information of both parties in the power system based on the power grid operation flow data and the power contract performance, and split the single node to obtain the split result, which is convenient for subsequent equivalent modeling and realizes fair, accurate and equivalent carbon emission measurement under power trading.

[0039] In step S102, based on the splitting result, equivalent power plants and equivalent loads are constructed for both the supply and demand sides of the contract, and equivalent transmission lines are constructed for partially occupied transmission lines.

[0040] Those skilled in the art can understand that the traditional carbon emission flow theory is based on the assumption that regional carbon emission intensity is evenly distributed. However, in actual application, regional carbon emission intensity is not the same. Therefore, the embodiment of the present application can introduce equivalent nodes and lines on the basis of the traditional carbon emission flow theory. Based on the splitting results in the above steps, equivalent power plants and equivalent loads are constructed for the supply and demand sides of the contract, and equivalent transmission lines are constructed for partially occupied transmission lines, thereby correcting the traditional carbon emission measurement results, which is conducive to achieving fair, accurate and equivalent carbon emission measurement under power trading.

[0041] Optionally, in one embodiment of the present application, based on the splitting result, equivalent power plants and equivalent loads are constructed for both the supply and demand sides of the contract, and equivalent transmission lines are constructed for partially occupied transmission lines, including: in the processing of the contract unit, multiple first virtual nodes are added to the original single node, virtual power sources are set in the transmission line, the units used for transmission are converted into virtual power sources, and are set at the initial port of the transmission channel, or the contract unit capacity equivalent to the green power contract is converted into a virtual unit, and is set at the initial port of the transmission channel; in the processing of the equivalent load, multiple first virtual nodes are added to the original single node, virtual power sources are set in the transmission line, virtual power sources are converted into virtual power sources, and are set at the initial port of the transmission channel; virtual power sources are added to the original single node, and virtual power sources ... Multiple second virtual nodes are set up with virtual loads at the end of the input line, and the contracted load is set at the end of the input channel, or the load capacity equivalent to the green electricity contract is converted into a virtual load and set at the end of the transmission channel; in the processing of the interconnection line between the virtual node and the equivalent node, the power interconnection line between the virtual node and the equivalent node is not modeled, or the power interconnection line is modeled, wherein the power flow of the interconnection line is 0; in the equivalent process of the direct supply virtual line, an equivalent modeling scheme of the direct supply virtual line is established; in the adjustment process of the bidirectional power transmission channel, a bidirectional contract unit and a bidirectional line are established.

[0042] Specifically, the embodiments of the present application can use equivalent modeling to introduce equivalent nodes and lines based on the traditional carbon emission flow theory, thereby correcting the traditional carbon emission measurement results. The specific modeling process may include the following steps:

[0043] 1. Handling of contract units

[0044] In traditional power system modeling, a specific area can be modeled as a node, and all units in the area can be equivalent to one unit, thereby equating all loads in the area to one load.

[0045] like Figure 2 As shown, the embodiments of the present application can improve the traditional equivalent network, including:

[0046] a. Add several virtual nodes to the original single node.

[0047] b. Set up a virtual power source in the transmission line, convert the units dedicated to transmission into virtual power sources and set them at the initial port of the transmission channel, or convert the contract unit capacity equivalent to the green power contract into a virtual unit and set it at the initial port of the transmission channel.

[0048] In an embodiment of the present application, the parameters of the contract units can be set according to the regional power retention and transmission plan. The equivalent capacity and equivalent carbon potential of all contract units in the system and the equivalent units in the network will be consistent with the power supply in the network, thereby ensuring the balance of carbon emissions in the system.

[0049] Among them, the output curve of the virtual power source and the corresponding equivalent carbon emission intensity can be determined by the electricity contract. For example, in green electricity trading, the carbon emission intensity of the contract unit can be set to zero.

[0050] Specifically, at node i, the node is split into virtual nodes i1 and i2. Virtual node i1 contains the load of the equivalent unit and the original node, while virtual node i2 contains the contracted unit. Virtual node i2 is connected to the outgoing line specified in the contract, while virtual node i1 is connected to all remaining lines connected to the original node i.

[0051] Contract unit capacity Equivalent unit capacity Compared with the original unit capacity The following relationship is satisfied:

[0052]

[0053] Contract unit output Equivalent unit output Compared with the actual output of the original unit Satisfies the following relationship

[0054]

[0055] Carbon potential of contracted units Equivalent unit carbon potential The real carbon potential of the original organic group The following relationship is satisfied:

[0056]

[0057] 2. Processing of equivalent load

[0058] If the object of the green electricity transaction is the entire node, the power load at the node does not need additional processing. The node load can be modeled at the original node, and all loads in the entire node can be equivalent to one load.

[0059] like Figure 2 As shown in Figure 1, if the power trading contracts are signed by some specific enterprises within the node, the load of these enterprises should be separated from the overall load of the node and modeled separately, including:

[0060] a. Add several virtual nodes to the original single node.

[0061] b. Set up a virtual load at the end of the input line, set the contracted load at the end of the input channel, or convert the load capacity equivalent to the green electricity contract into a virtual load and set it at the end of the transmission channel.

[0062] Specifically, at node i, the node is split into virtual nodes i1 and i2. Virtual node i1 contains the equivalent load and the units at the original node, while virtual node i2 contains the contracted load. Virtual node i2 is connected to the input line specified in the contract, while virtual node i1 is connected to all remaining lines connected to the original node i.

[0063] Specifically, at node i, the total contract load Equivalent unit output Compared with the actual output of the original unit Satisfies the following relationship

[0064]

[0065] 3. Processing of contact lines between virtual nodes and equivalent nodes

[0066] In steps 1 and 2 above, virtual nodes can be created. A single existing node may be split into multiple virtual nodes during the modeling process. During the calculation process, no power tie lines are modeled between the virtual nodes and the equivalent nodes, or a power tie line is modeled, but the power flow on the tie line is zero.

[0067] 4. Equivalence of direct supply virtual lines

[0068] like Figure 3 As shown, the embodiment of the present application can establish an equivalent modeling scheme for a direct virtual line, and the modeling method is as follows:

[0069] If the connection method between node i and nodes a, b, c is ia, ab, bc, and there are contract transactions between the loads of node i and nodes a, b, c (wherein the characteristic is that node i does not have a direct connection line with all the nodes that have reached a transaction), then the direct virtual line is established by establishing a virtual line of ia, ab, bc.

[0070] Specifically, for the direct supply equivalent line b, the line power P b and line end load Satisfies the following relationship

[0071]

[0072] 5. Adjustment of bidirectional power transmission channel

[0073] It's important to note that in some special circumstances (such as areas with seasonally abundant electricity), the transmission path may experience a phenomenon where the current flows in opposite directions at different times. In these cases, there is no absolute sending and receiving grid, and power can flow in both directions between the grids at different times.

[0074] Based on this situation, it is necessary to establish a two-way contract unit and a two-way line. Figure 4 As shown, the establishment method is that for lines with bidirectional power transmission channels, the original lines are deleted during modeling and the lines are changed to lines and lines, where the lines represent the current flowing in the forward direction and the lines represent the current flowing in the reverse direction. The lines are connected from the virtual node containing the contracted units at the starting node to the virtual node containing the contracted load at the ending node; the lines are connected from the virtual node containing the contracted load at the starting node to the virtual node containing the contracted units at the ending node.

[0075] The calculation of power flow can be done in the following form. Let the power flow on two equivalent lines be and (The reference direction of the tidal current is the same as the original tidal current), then the relationship between the tidal current of the equivalent route and the original tidal current is as follows:

[0076]

[0077]

[0078] Since the power flow of a single power transmission channel cannot be in opposite directions in the same time period, at any single moment, the power flow of one of the two equivalent lines of the bidirectional power transmission channel must be zero.

[0079] In step S103, based on the equivalent transmission line, the corresponding power flow of the equivalent line of the target medium- and long-term power contract is calculated, and the original carbon emission flow calculation result is corrected according to the power flow to obtain the equivalent carbon emissions of all load electricity in the target area.

[0080] During the actual implementation process, the embodiment of the present application can calculate the corresponding flow of the equivalent line of the target medium- and long-term electricity contract through the model established by the above steps, and correct the original carbon emission flow calculation results based on the calculation results, and then obtain the equivalent carbon emissions of all load electricity in the target area, thereby realizing the correction of traditional carbon emission measurement results on the basis of traditional carbon emission flow theory, effectively measuring the carbon emission flow in the power system while considering the power contract, and verifying the equivalent carbon emissions of users' medium- and long-term electricity consumption, thereby realizing fair, accurate and equivalent carbon emission measurement under power trading, which has high applicability and is easy to promote and apply.

[0081] Optionally, in one embodiment of the present application, the corresponding flow of the equivalent line of the target medium- and long-term power contract is calculated, including: obtaining at least one of the load carbon potential, node carbon potential, and line carbon flow based on the data of the contract unit, contract load, and virtual line.

[0082] Furthermore, the embodiment of the present application is a modification of the existing technology of "carbon emission flow calculation". After completing the equivalent modeling of contract units, contract loads and the equivalent modeling of direct supply virtual lines, the embodiment of the present application can input the data of contract units, contract loads and virtual lines into the carbon emission flow calculation program, and through the input format that is the same as that of ordinary units, loads and lines, with the help of existing carbon emission flow calculation methods, obtain at least one of the physical quantities such as load carbon potential, node carbon potential, line carbon flow, etc.

[0083] Optionally, in one embodiment of the present application, the calculation formula for equivalent carbon emissions per unit electricity consumption of all loads in the target area is:

[0084]

[0085] Where i is a node, is the load of node i, is the carbon emission intensity per unit of electricity consumption at node i.

[0086] Specifically, the results output by the carbon emission flow calculation program may include the carbon potential corresponding to the virtual node of the contracted unit, which is the carbon potential corresponding to the settlement of the contracted unit.

[0087] In the results output by the carbon emission flow calculation program, the carbon potential corresponding to the virtual node of the contract load may be included, which is the carbon potential corresponding to the load settlement when the contract is signed.

[0088] Among them, the total load electricity equivalent carbon emissions for the entire region The calculation can be done in the following way:

[0089]

[0090] Where i is a node, is the load of node i, is the carbon emission intensity (carbon potential) per unit electricity consumption of node i.

[0091] The following combination Figures 2 to 5 As shown, the working principle of the carbon emission flow analysis method under the power trading contract in the embodiment of the present application is described in detail with a specific embodiment.

[0092] like Figure 5 As shown, the embodiment of the present application includes the following steps:

[0093] Step S501: Obtaining Information. During actual implementation, embodiments of the present application can obtain the network topology, power system flow data, green power contract transaction volume, and node information of both parties in the power system based on power grid operation flow data and power contract performance. The application also splits individual nodes to obtain split results, facilitating subsequent equivalent modeling and achieving fair, accurate, and equivalent carbon emission measurement under power trading.

[0094] Step S502: Equivalent modeling. Specifically, the embodiment of the present application can use equivalent modeling to introduce equivalent nodes and lines based on the traditional carbon emission flow theory, thereby correcting the traditional carbon emission measurement results. The specific modeling process may include the following steps:

[0095] 3. Handling of contract units

[0096] In traditional power system modeling, a specific area can be modeled as a node, and all units in the area can be equivalent to one unit, thereby equating all loads in the area to one load.

[0097] like Figure 2 As shown, the embodiments of the present application can improve the traditional equivalent network, including:

[0098] a. Add several virtual nodes to the original single node.

[0099] b. Set up a virtual power source in the transmission line, convert the units dedicated to transmission into virtual power sources and set them at the initial port of the transmission channel, or convert the contract unit capacity equivalent to the green power contract into a virtual unit and set it at the initial port of the transmission channel.

[0100] In an embodiment of the present application, the parameters of the contract units can be set according to the regional power retention and transmission plan. The equivalent capacity and equivalent carbon potential of all contract units in the system and the equivalent units in the network will be consistent with the power supply in the network, thereby ensuring the balance of carbon emissions in the system.

[0101] Among them, the output curve of the virtual power source and the corresponding equivalent carbon emission intensity can be determined by the electricity contract. For example, in green electricity trading, the carbon emission intensity of the contract unit can be set to zero.

[0102] Specifically, at node i, the node is split into virtual nodes i1 and i2. Virtual node i1 contains the load of the equivalent unit and the original node, while virtual node i2 contains the contracted unit. Virtual node i2 is connected to the outgoing line specified in the contract, while virtual node i1 is connected to all remaining lines connected to the original node i.

[0103] Contract unit capacity Equivalent unit capacity Compared with the original unit capacity The following relationship is satisfied:

[0104]

[0105] Contract unit output Equivalent unit output Compared with the actual output of the original unit Satisfies the following relationship

[0106]

[0107] Carbon potential of contracted units Equivalent unit carbon potential The real carbon potential of the original organic group The following relationship is satisfied:

[0108]

[0109] 4. Processing of equivalent load

[0110] If the object of the green electricity transaction is the entire node, the power load at the node does not need additional processing. The node load can be modeled at the original node, and all loads in the entire node can be equivalent to one load.

[0111] like Figure 2 As shown in Figure 1, if the power trading contracts are signed by some specific enterprises within the node, the load of these enterprises should be separated from the overall load of the node and modeled separately, including:

[0112] a. Add several virtual nodes to the original single node.

[0113] b. Set up a virtual load at the end of the input line, set the contracted load at the end of the input channel, or convert the load capacity equivalent to the green electricity contract into a virtual load and set it at the end of the transmission channel.

[0114] Specifically, at node i, the node is split into virtual nodes i1 and i2. Virtual node i1 contains the equivalent load and the units at the original node, while virtual node i2 contains the contracted load. Virtual node i2 is connected to the input line specified in the contract, while virtual node i1 is connected to all remaining lines connected to the original node i.

[0115] Specifically, at node i, the total contract load Equivalent unit output Compared with the actual output of the original unit Satisfies the following relationship

[0116]

[0117] 3. Processing of contact lines between virtual nodes and equivalent nodes

[0118] In steps 1 and 2 above, virtual nodes can be created. A single existing node may be split into multiple virtual nodes during the modeling process. During the calculation process, no power tie lines are modeled between the virtual nodes and the equivalent nodes, or a power tie line is modeled, but the power flow on the tie line is zero.

[0119] 4. Equivalence of direct supply virtual lines

[0120] like Figure 3 As shown, the embodiment of the present application can establish an equivalent modeling scheme for a direct virtual line, and the modeling method is as follows:

[0121] If the connection method between node i and nodes a, b, c is ia, ab, bc, and there are contract transactions between the loads of node i and nodes a, b, c (wherein the characteristic is that node i does not have a direct connection line with all the nodes that have reached a transaction), then the direct virtual line is established by establishing a virtual line of ia, ab, bc.

[0122] Specifically, for the direct supply equivalent line b, the line power P b and line end load Satisfies the following relationship

[0123]

[0124] 5. Adjustment of bidirectional power transmission channel

[0125] It's important to note that in some special circumstances (such as areas with seasonally abundant electricity), the transmission path may experience a phenomenon where the current flows in opposite directions at different times. In these cases, there is no absolute sending and receiving grid, and power can flow in both directions between the grids at different times.

[0126] Based on this situation, it is necessary to establish a two-way contract unit and a two-way line. Figure 4 As shown, the establishment method is that for lines with bidirectional power transmission channels, the original lines are deleted during modeling and the lines are changed to lines and lines, where the lines represent the current flowing in the forward direction and the lines represent the current flowing in the reverse direction. The lines are connected from the virtual node containing the contracted units at the starting node to the virtual node containing the contracted load at the ending node; the lines are connected from the virtual node containing the contracted load at the starting node to the virtual node containing the contracted units at the ending node.

[0127] The calculation of power flow can be done in the following form. Let the power flow on two equivalent lines be and (The reference direction of the tidal current is the same as the original tidal current), then the relationship between the tidal current of the equivalent route and the original tidal current is as follows:

[0128]

[0129]

[0130] Since the power flow of a single power transmission channel cannot be in opposite directions in the same time period, at any single moment, the power flow of one of the two equivalent lines of the bidirectional power transmission channel must be zero.

[0131] Step S503: Calculate and obtain carbon emission flow analysis results through equivalent modeling. Furthermore, this embodiment of the present application is a modification of the existing "carbon emission flow calculation" technology. After completing equivalent modeling of contract units, contract loads, and direct supply virtual lines, this embodiment of the present application can input the data of contract units, contract loads, and virtual lines into the carbon emission flow calculation program. Using the same input format as for ordinary units, loads, and lines, the existing carbon emission flow calculation method can be used to obtain at least one of the following physical quantities: load carbon potential, node carbon potential, and line carbon flow.

[0132] Specifically, the results output by the carbon emission flow calculation program may include the carbon potential corresponding to the virtual node of the contracted unit, which is the carbon potential corresponding to the settlement of the contracted unit.

[0133] In the results output by the carbon emission flow calculation program, the carbon potential corresponding to the virtual node of the contract load may be included, which is the carbon potential corresponding to the load settlement when the contract is signed.

[0134] Among them, the total load electricity equivalent carbon emissions for the entire region The calculation can be done in the following way:

[0135]

[0136] Where i is a node, is the load of node i, is the carbon emission intensity (carbon potential) per unit electricity consumption of node i.

[0137] According to the carbon emission flow analysis method under the power trading contract proposed in the embodiment of the present application, the traditional carbon emission flow theory can be used to correct the traditional carbon emission measurement results based on the power grid operation flow data and the performance of the power contract by introducing equivalent nodes and lines, thereby obtaining the total load power equivalent carbon emissions of the target area. Taking the power contract into consideration, the carbon emission flow in the power system can be effectively measured, and the user's medium- and long-term electricity equivalent carbon emissions can be verified, thereby achieving fair, accurate and equivalent carbon emission measurement under power trading, with high applicability. Therefore, the technical problem that the related technology is based on the traditional carbon emission flow theory and cannot perform effective carbon emission analysis under large-scale power trading contracts and has poor applicability is solved.

[0138] Next, a carbon emission flow analysis device considering a power trading contract according to an embodiment of the present application will be described with reference to the accompanying drawings.

[0139] Figure 6 4 is a block diagram of a device for analyzing carbon emission flows under a power trading contract according to an embodiment of the present application.

[0140] like Figure 6 As shown, the carbon emission flow analysis device 10 considering the power trading contract includes: a splitting module 100, a construction module 200 and an analysis module 300.

[0141] Specifically, the splitting module 100 is used to split a single node based on the power grid operation flow data and the power contract performance status to obtain a splitting result.

[0142] The construction module 200 is used to construct equivalent power plants and equivalent loads for both the supply and demand sides of the contract based on the splitting results, and to construct equivalent transmission lines for partially occupied transmission lines.

[0143] The analysis module 300 is used to calculate the corresponding power flow of the equivalent line of the target medium- and long-term power contract based on the equivalent transmission line, and to correct the original carbon emission flow calculation result according to the power flow to obtain the equivalent carbon emissions of all load electricity in the target area.

[0144] Optionally, in one embodiment of the present application, the construction module 200 includes: a first virtual node, a second virtual node, a processing unit, a modeling unit, and an adjustment unit.

[0145] Among them, the first virtual node, in the processing process of the contract unit, adds multiple first virtual nodes to the original single node, sets a virtual power supply in the transmission line, converts the unit used for transmission into a virtual power supply, and sets it at the initial port of the transmission channel, or converts the contract unit capacity equivalent to the green electricity contract into a virtual power supply, and sets it at the initial port of the transmission channel.

[0146] The second virtual node, during the processing of equivalent load, adds multiple second virtual nodes to the original single node, sets a virtual load at the end of the input line, sets the contracted load at the end of the input channel, or converts the load capacity equivalent to the green electricity contract into a virtual load and sets it at the end of the transmission channel.

[0147] The processing unit is used for not modeling the power tie line between the virtual node and the equivalent node, or modeling the power tie line between the virtual node and the equivalent node, wherein the power flow of the tie line is 0.

[0148] The modeling unit is used to establish an equivalent modeling scheme of the direct supply virtual line in the equivalent process of the direct supply virtual line.

[0149] The adjustment unit is used to establish a bidirectional contract unit and a bidirectional line during the adjustment process of the bidirectional power transmission channel.

[0150] Optionally, in one embodiment of the present application, the analysis module 300 includes: an acquisition unit.

[0151] Among them, the acquisition unit is used to obtain at least one of the load carbon potential, node carbon potential, and line carbon flow based on the data of the contract unit, contract load, and virtual line.

[0152] Optionally, in one embodiment of the present application, the calculation formula for equivalent carbon emissions per unit electricity consumption of all loads in the target area is:

[0153]

[0154] Where i is a node, is the load of node i, is the carbon emission intensity per unit of electricity consumption at node i.

[0155] It should be noted that the above explanation of the embodiment of the carbon emission flow analysis method considering the power trading contract is also applicable to the carbon emission flow analysis device considering the power trading contract in this embodiment, and will not be repeated here.

[0156] According to the carbon emission flow analysis device under the power trading contract proposed in the embodiment of the present application, the traditional carbon emission flow theory can be used to correct the traditional carbon emission measurement results based on the power grid operation flow data and the performance of the power contract by introducing equivalent nodes and lines, thereby obtaining the total load power equivalent carbon emissions of the target area. Taking the power contract into consideration, the carbon emission flow in the power system can be effectively measured, and the user's medium- and long-term electricity equivalent carbon emissions can be verified, thereby achieving fair, accurate and equivalent carbon emission measurement under power trading, with high applicability. Therefore, the technical problem that the related technology is based on the traditional carbon emission flow theory and cannot perform effective carbon emission analysis under large-scale power trading contracts and has poor applicability is solved.

[0157] Figure 7 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. The electronic device may include:

[0158] A memory 701 , a processor 702 , and a computer program stored in the memory 701 and executable on the processor 702 .

[0159] When the processor 702 executes the program, the carbon emission flow analysis method considering the power trading contract provided in the above embodiment is implemented.

[0160] Furthermore, the electronic device further includes:

[0161] The communication interface 703 is used for communication between the memory 701 and the processor 702 .

[0162] The memory 701 is used to store computer programs that can be run on the processor 702 .

[0163] The memory 701 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0164] If the memory 701, processor 702, and communication interface 703 are implemented independently, the communication interface 703, memory 701, and processor 702 can be interconnected via a bus and communicate with each other. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus. Buses can be divided into address buses, data buses, control buses, etc. For ease of representation, Figure 7Only one thick line is used in the diagram, but this does not mean that there is only one bus or one type of bus.

[0165] Optionally, in a specific implementation, if the memory 701, the processor 702 and the communication interface 703 are integrated on a chip, the memory 701, the processor 702 and the communication interface 703 can communicate with each other through an internal interface.

[0166] The processor 702 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application.

[0167] This embodiment also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above-mentioned carbon emission flow analysis method under the consideration of power trading contracts.

[0168] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0169] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this application, "N" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0170] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present application belong.

[0171] The logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing the logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (e.g., a computer-based system, a system including a processor, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device). For purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include the following: an electrical connection with one or N wires (electronic devices), a portable computer disk cartridge (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and programmable read-only memory (EPROM or flash memory), fiber optic devices, and a portable compact disc read-only memory (CDROM). Furthermore, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing it in another suitable manner if necessary, and then storing it in a computer memory.

[0172] It should be understood that various parts of the present application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiment, the N steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used to implement: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0173] Those skilled in the art will understand that all or part of the steps in the method of the above embodiment can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiment.

[0174] In addition, the functional units in the various embodiments of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into a module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0175] The storage medium mentioned above may be a read-only memory, a magnetic disk, or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application. Persons skilled in the art may make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A carbon emission flow analysis method considering power trading contracts, characterized in that: The following steps are involved: Based on the power grid operation flow data and the performance of the power contract, a single node is split and processed to obtain the split result; Based on the splitting results, equivalent power plants and equivalent loads are constructed for both the supply and demand sides of the contract, and equivalent transmission lines are constructed for partially occupied transmission lines; as well as Based on the equivalent transmission line, the corresponding power flow of the equivalent line of the target medium- and long-term power contract is calculated, and the original carbon emission flow calculation result is corrected according to the power flow to obtain the equivalent carbon emissions of all load electricity in the target area; Among them, based on the splitting result, equivalent power plants and equivalent loads are constructed for the supply and demand sides of the contract respectively, and equivalent transmission lines are constructed for partially occupied transmission lines, including: in the processing of the contract unit, multiple first virtual nodes are added to the original single node, virtual power sources are set in the transmission line, the units used for transmission are converted into virtual power sources, and are set at the initial port of the transmission channel, or the contract unit capacity equivalent to the green power contract is converted into a virtual unit, and is set at the initial port of the transmission channel; in the processing of equivalent loads, multiple second virtual nodes are added to the original single node, virtual power sources are set in the transmission line, virtual power sources are set in the transmission line, virtual power sources are set in the initial port of the transmission channel, and virtual power sources are set in the initial port of the transmission channel; virtual power sources are set in the initial port of the transmission channel ... virtual power sources are set in the initial port of the transmission channel; virtual power sources are set in the initial port of the transmission channel, virtual power sources are set in the initial port of the transmission channel; virtual power sources are set in the initial port of the transmission channel, virtual power sources are set in the initial port of the transmission channel; virtual A virtual node sets a virtual load at the end of the input line, sets the contracted load at the end of the input channel, or converts the load capacity equivalent to the green electricity contract into a virtual load and sets it at the end of the transmission channel; in the processing of the interconnection line between the virtual node and the equivalent node, the power interconnection line between the virtual node and the equivalent node is not modeled, or a power interconnection line is modeled, wherein the power flow of the interconnection line is 0; in the equivalent process of the direct supply virtual line, an equivalent modeling scheme for the direct supply virtual line is established; in the adjustment process of the bidirectional power transmission channel, a bidirectional contract unit and a bidirectional line are established.

2. The method according to claim 1, characterized in that The calculation of the corresponding power flow of the equivalent line of the target medium- and long-term power contract includes: At least one of load carbon potential, node carbon potential, and line carbon flow is obtained based on data of contract units, contract loads, and virtual lines.

3. The method according to claim 2, characterized in that The calculation formula for the equivalent carbon emissions per unit of electricity consumption of all loads in the target area is: Where i is a node, is the load of node i, is the carbon emission intensity per unit of electricity consumption at node i.

4. A carbon emission flow analysis device considering power trading contracts, characterized in that: include: The splitting module is used to split a single node based on the power grid operation flow data and the performance of the power contract to obtain the splitting results; A construction module, configured to construct equivalent power plants and equivalent loads for both the supply and demand sides of the contract based on the splitting results, and to construct equivalent transmission lines for partially occupied transmission lines; as well as An analysis module is configured to calculate the corresponding power flow of the equivalent line of the target medium- and long-term power contract based on the equivalent transmission line, and to correct the original carbon emission flow calculation result according to the power flow to obtain the equivalent carbon emissions of all load electricity in the target area; The construction module includes: a first virtual node, in the process of processing the contract unit, multiple first virtual nodes are added to the original single node, a virtual power supply is set in the transmission line, the unit used for transmission is converted into a virtual power supply, and is set at the initial port of the transmission channel, or the contract unit capacity equivalent to the green power contract is converted into a virtual unit, and is set at the initial port of the transmission channel; a second virtual node, in the process of processing the equivalent load, multiple second virtual nodes are added to the original single node, a virtual load is set at the end of the input line, and the contracted load is converted into a virtual unit. The load is set at the end of the input channel, or the load capacity equivalent to the green electricity contract is converted into a virtual load and set at the end of the transmission channel; the processing unit is used to not model the power tie line between the virtual node and the equivalent node, or to model the power tie line, wherein the power flow of the tie line is 0; the modeling unit is used to establish an equivalent modeling scheme of the direct supply virtual line in the equivalent process of the direct supply virtual line; the adjustment unit is used to establish a bidirectional contract unit and a bidirectional line in the adjustment process of the bidirectional power transmission channel.

5. The device according to claim 4, characterized in that The analysis module includes: The acquisition unit is used to acquire at least one of load carbon potential, node carbon potential, and line carbon flow based on data of contract units, contract loads, and virtual lines.

6. The device according to claim 5, characterized in that The calculation formula for the equivalent carbon emissions per unit of electricity consumption of all loads in the target area is: Where i is a node, is the load of node i, is the carbon emission intensity per unit of electricity consumption at node i.

7. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the carbon emission flow analysis method under a power trading contract as described in any one of claims 1 to 3.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: The program is executed by a processor to implement the carbon emission flow analysis method under a power trading contract as described in any one of claims 1 to 3.

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