Carbon emission assessment method and device, storage medium and product

Abstract

The invention discloses a carbon emission evaluation method and device, a storage medium and a product, and relates to the technical field of carbon emission. The method is based on the node electric power parameters, the node heat parameters, the heat supply carbon emission intensity of each source of the park and the power supply carbon emission intensity of each source of the park; according to the heat loss of the branches between the nodes, the heat transmission amount of the branches between the nodes, the actual heat consumption amount corresponding to the nodes and the heat supply carbon emission intensity of all sources in the park, the heat consumption carbon emission intensity of the nodes is calculated; and calculating the power utilization carbon emission intensity of the node based on the power utilization load of each node, the active power flow condition among the nodes and the power supply carbon emission intensity of each source in the park, thereby effectively conducting the carbon emission responsibilities of electric power and thermal resources to the specific node, helping users corresponding to the node to know the energy utilization cleanliness, and improving the user experience. And a basic signal is provided for low-carbon response of a user.

Description

Technical Field

[0001] This application relates to the field of carbon emission technologies, and in particular, to a carbon emission assessment method, device, storage medium, and product. Background Art

[0002] In the related art, with the improvement of the digital and intelligent levels of industrial parks, the energy consumption monitoring in the parks tends to be online, high-frequency, and fine-grained. However, in complex industrial parks, especially those with self-owned power plants, involving the processing, conversion, and transmission processes of energy, the division of carbon emission responsibilities is not accurate, and it is difficult to reasonably split the carbon emission responsibilities and transmit them to the user side.

[0003] Therefore, how to reasonably divide the carbon emission responsibilities of the park is an urgent problem to be solved at present. Summary of the Invention

[0004] The main purpose of this application is to provide a carbon emission assessment method, device, storage medium, and product, aiming to solve the technical problem of how to reasonably divide the carbon emission responsibilities of the park.

[0005] To achieve the above object, this application proposes a carbon emission assessment method, which includes: Obtain the node power parameters and node heat parameters of the park, as well as the power supply carbon emission intensity from each source in the park and the heat supply carbon emission intensity from each source in the park; wherein, the node power parameters include the electricity consumption load of each node and the active power flow situation between each node; the node heat parameters include the actual heat consumption corresponding to each node, the heat loss of the branch between each node, and the heat transfer amount of the branch between each node; For any node, calculate the heat consumption carbon emission intensity of the node according to the heat loss of the branch between each node, the heat transfer amount of the branch between each node, the actual heat consumption corresponding to the node, and the heat supply carbon emission intensity from each source in the park; For any node, calculate the electricity consumption carbon emission intensity of the node based on the electricity consumption load of the node, the active power flow situation between each node, and the power supply carbon emission intensity from each source in the park.

[0006] In some embodiments, after calculating the electricity consumption carbon emission intensity of the node for any node based on the electricity consumption load of each node, the active power flow situation between each node, and the power supply carbon emission intensity from each source in the park, the carbon emission assessment method further includes: For any node, based on the corresponding carbon dioxide emission equivalent of non-carbon dioxide greenhouse gases, heat carbon emission intensity, electricity carbon emission intensity, node electricity consumption, and node heat consumption, calculate the carbon dioxide emission equivalent of the node; wherein, the corresponding carbon dioxide emission equivalent of non-carbon dioxide greenhouse gases is calculated based on the global warming potential of each non-carbon dioxide greenhouse gas and the corresponding actual emissions; Calculate the carbon emission intensity per unit output value during the specified period based on the ratio of the carbon dioxide emission equivalent of the node to the industrial production added value of the node during the specified period; Calculate the product carbon footprint level during the specified period based on the ratio of the carbon dioxide emission equivalent of the node to the product output of the node during the specified period.

[0007] In some embodiments, the calculating the electricity carbon emission intensity of the node based on the electricity load of the node, the active power flow between each node, and the power supply carbon emission intensity of each source in the park includes: For any node, calculate the total injection power of the node according to the sum of the active power injection of the generator sets accessed by the node and the total inflow power from other connected nodes to the node; Determine the power injection matrix of the node according to the total injection power of the node and the active power flow between each node; Calculate the backtracking matrix of the node according to the power injection matrix; Calculate the load ratio of the node according to the electricity load corresponding to the node and the total injection power; Determine the electricity carbon emission intensity of the node according to the power supply carbon emission intensity of each source in the park, the load ratio, and the backtracking matrix of the node.

[0008] In some embodiments, the obtaining the node power parameters of the park includes: Construct a park network topology, wherein the network topology is a directed graph, each node in the network topology corresponds to each node in the park one by one, and each edge in the network topology is established according to the connection relationship between nodes; each edge in the network topology has a branch impedance; According to the electricity load of each node, calculate the branch current of each branch between nodes level by level along the direction from the terminal node to the root node in the network topology; According to the known voltage of the node corresponding to the root node, the branch current, and the branch impedance, calculate the voltage of each node level by level along the direction from the root node to the terminal node; Active power flow conditions between the nodes are determined according to the branch currents and the voltages of the nodes.

[0009] In some embodiments, the node heat parameters also include specific enthalpy and mass of the heat medium at different locations in the campus network topology; Before calculating the heat carbon emission intensity of the node according to the heat loss of the branch between each node, the heat transfer amount of the branch between the nodes, the actual heat consumption corresponding to the node, and the heat carbon emission intensity of each source in the park, the carbon emission assessment method further includes: For any node, the total heat injected into the node is calculated based on the first heat injected by the unit connected to the node and the second heat flowing in through the branches between the nodes; wherein the second heat is the product of the mass of the heat medium flowing into the node through the branches between the nodes and the specific enthalpy of the heat medium; For any inter-node branch, the heat loss of the inter-node branch is calculated according to the mass of the heat medium in the inter-node branch, the specific enthalpy of the heat medium at the end node of the branch, and the specific enthalpy of the heat medium at the outlet of the first node of the branch; Calculating the branch carbon emission intensity of the inter-node branch according to the carbon emission carried by the heat supply of the inter-node branch and the heat transfer amount of the inter-node branch; The heat carbon emission intensity of the node is calculated based on the heat loss of the branch between each node, the heat transmission amount of the branch between the nodes, the actual heat consumption corresponding to the node, and the heat carbon emission intensity of each source in the park, including: The ratio of the total inflow carbon emissions of the node to the total inflow heat of the node is taken as the heat carbon emission intensity of the node; wherein the total inflow carbon emissions include the carbon emissions corresponding to all inter-node branches with the node as the branch end and the unit injection emissions, the carbon emissions corresponding to the branches are calculated based on the branch carbon emission intensity, heat transfer and heat loss of the inter-node branches, and the unit injection emissions are calculated based on the heating carbon emission intensity of the node connected to the unit and the first heat.

[0010] In some embodiments, the carbon emissions assessment method further comprises: The product of the actual electricity consumption of the target user and the electricity carbon emission intensity of the node where the target user is located is used as the electricity carbon emission apportionment value of the target user; The product of the actual heat consumption of the target user and the heat carbon emission intensity of the node where the target user is located is taken as the heat carbon emission apportionment value of the target user.

[0011] In some embodiments, the power supply source and the heat supply source of the park include a self - contained power plant; before obtaining the node power parameters and node heat parameters of the park, as well as the power supply carbon emission intensity of each source in the park and the heat supply carbon emission intensity of each source in the park, the carbon emission assessment method further includes: Calculating the carbon emission level of the self - contained power plant based on the carbon content, carbon oxidation rate, and fuel consumption of various fuels used by the self - contained power plant; Calculating the power supply carbon emission and the heat supply carbon emission based on the heat supply ratio of the self - contained power plant and the carbon emission level of the self - contained power plant; Determining the power supply carbon emission intensity of the self - contained power plant by the ratio of the power supply carbon emission to the output power of the self - contained power plant; Determining the heat supply carbon emission intensity of the self - contained power plant by the ratio of the heat supply carbon emission to the output heat of the self - contained power plant.

[0012] In addition, to achieve the above - mentioned object, the present application also proposes a carbon emission assessment device, which includes: a memory, a processor, and a computer program stored on the memory and executable on the processor. The computer program is configured to implement the steps of the carbon emission assessment method as described above.

[0013] In addition, to achieve the above - mentioned object, the present application also proposes a storage medium, which is a computer - readable storage medium. A computer program is stored on the storage medium, and when the computer program is executed by a processor, it implements the steps of the carbon emission assessment method as described above.

[0014] In addition, to achieve the above - mentioned object, the present application also proposes a computer program product, which includes a computer program. When the computer program is executed by a processor, it implements the steps of the carbon emission assessment method as described above.

[0015] One or more technical solutions proposed by the present application have at least the following technical effects: Based on the node power parameters, node heat parameters, heat supply carbon emission intensity of each source in the park, and power supply carbon emission intensity of each source in the park, for any node, according to the heat loss of the branch between nodes, the heat transfer amount of the branch between nodes, the actual heat consumption corresponding to the node, and the heat supply carbon emission intensity of each source in the park, calculating the heat consumption carbon emission intensity of the node; based on the electricity load of each node, the active power flow situation between nodes, and the power supply carbon emission intensity of each source in the park, calculating the electricity consumption carbon emission intensity of the node, thereby effectively transmitting the carbon emission responsibility of electric power and heat resources to specific nodes, helping the users corresponding to the nodes understand the cleanliness of energy use, and providing a basic signal for users' low - carbon response. Description of the Drawings

[0016] The accompanying drawings here are incorporated into the description and form a part of this description, showing embodiments consistent with the present application, and are used together with the description to explain the principles of the present application.

[0017] To more clearly illustrate the technical solutions in the embodiments of the present application or in the prior art, the accompanying drawings required for use in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It shows a schematic flowchart of a carbon emission assessment method provided by an embodiment of the present application; Figure 2 It shows a schematic flowchart of a carbon emission assessment method provided by another embodiment of the present application; Figure 3 It shows a schematic structural diagram of a carbon emission assessment device provided by an embodiment of the present application.

[0019] The realization of the purpose, functional characteristics and advantages of the present application will be further described in conjunction with the embodiments with reference to the accompanying drawings. Detailed Embodiments

[0020] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0021] To better understand the technical solutions of the present application, the following will be described in detail in conjunction with the drawings of the description and specific embodiments.

[0022] The main solution of the embodiments of the present application is: obtaining the node power parameters and node heat parameters of the park, as well as the power supply carbon emission intensity of each source in the park and the heating carbon emission intensity of each source in the park; wherein, the node power parameters include the electricity consumption load of each node and the active power flow situation between each node; the node heat parameters include the actual heat consumption corresponding to each node, the heat loss of the branch between each node and the heat transfer amount of the branch between each node; for any node, calculating the heat consumption carbon emission intensity of the node according to the heat loss of the branch between each node, the heat transfer amount of the branch between each node, the actual heat consumption corresponding to the node and the heating carbon emission intensity of each source in the park; for any node, calculating the electricity consumption carbon emission intensity of the node based on the electricity consumption load of each node, the active power flow situation between each node and the power supply carbon emission intensity of each source in the park.

[0023] In the related art, with the improvement of the digital and intelligent level of industrial parks, the energy consumption monitoring in the parks tends to be online, high-frequency, and fine-grained. However, in complex parks, especially industrial parks with self-owned power plants, involving the processing, conversion, and transmission processes of energy, the division of carbon emission responsibilities is not accurate, and it is difficult to reasonably split the carbon emission responsibilities and conduct them to the user side.

[0024] In summary, how to reasonably divide the carbon emission responsibilities of the park is an urgent problem to be solved currently.

[0025] Based on this, the present application provides a solution to enable park users to more reasonably, accurately, and frequently measure their own carbon emission levels, and encourage users in the park to better respond to the call for energy conservation, emission reduction, and sustainable development.

[0026] It should be noted that the execution subject of this embodiment can be a computing service device with data processing, network communication, and program running functions, such as a tablet computer, a personal computer, a mobile phone, etc., or a carbon emission assessment device capable of implementing the above functions. Hereinafter, taking the carbon emission assessment device as an example, this embodiment and the following embodiments will be described.

[0027] Referring to Figure 1 , Figure 1 shows a schematic flow chart of a carbon emission assessment method provided by an embodiment of the present application. The carbon emission assessment method can be applied to a carbon emission assessment device, including the following steps S110 to step S130: Step S110, obtain the node power parameters and node heat parameters of the park, as well as the power supply carbon emission intensity from each source in the park and the heating carbon emission intensity from each source in the park.

[0028] Among them, there can be multiple nodes in the park, and each node can be a power / heat consumption unit, such as a factory; there can also be multiple users in each node. For example, multiple users can be planned in a factory building for use.

[0029] In some embodiments, different schemes for obtaining node power parameters can be designed according to the integrity of the acquisition devices in the park. In some possible cases, there may not be many acquisition devices in the park, and only the relevant parameters of some nodes can be collected; in other possible cases, the acquisition devices in the park are very few, and the collected relevant parameters do not support the carbon emission calculation in the embodiments of the present application; in still other possible cases, the acquisition devices in the park are sufficient to fully collect various relevant parameters, and there is no need to perform relevant calculations through the following listed methods, and they can be directly used.

[0030] Node power parameters refer to parameters related to the power consumption of each node in the park. Specifically, the node power parameters include the power load of each node and the active power flow between nodes.

[0031] In the case where the collection equipment in the park is limited but the relevant data of the key nodes can be obtained, the park network topology can be constructed for the park. It is understandable that a dedicated power access node can be included in the park and used as the root node in the network topology. The root node can be connected to a transmission network such as the State Grid, and can also be connected to the park's self-provided power plant (i.e., a power plant built by the park itself to generate electricity through fossil fuels) to be powered by the self-provided power plant. In addition, new energy generators in the park can also be connected, which is not limited in this embodiment.

[0032] Each node in the network topology corresponds to each node in the park one by one, and each edge in the network topology is established according to the connection relationship between the nodes.

[0033] It is understandable that in order to transmit the power connected to the root node to each node in the park, a transmission network, such as a high-voltage transmission line, needs to be established in the park. By designing a reasonable transmission network, the root node can be used as the starting point to achieve full coverage of the nodes. Therefore, the topological network is to start from the root node, build multiple edges with directions, and extend step by step towards the terminal node (that is, the node at the end of the power supply line) to form a directed graph.

[0034] Each edge in the network topology has a branch impedance, and each node has an electrical load. In this embodiment, the branch impedance in the transmission line can be measured in real time by relevant equipment, and the overall electrical load of the node can be measured by relevant measurement equipment set at the node. The electrical load refers to the electrical load power of the node.

[0035] The previous generation back-pushing method can be used to infer the information of the entire network topology based on partial known information through continuous iteration.

[0036] ① According to the complex power load pre-collected for at least some of the nodes among all the nodes, the branch current of each inter-node branch is calculated step by step along the direction from the terminal node to the root node in the network topology. Among them, the inter-node branch refers to the branch between any node and its upper node; some nodes at least include terminal nodes. It can be understood that if the complex power load of the terminal node is unknown, the complex power load of the upper node cannot be calculated.

[0037] In the following, branch j→i is taken as an example. In some implementations, the branch current of each inter-node branch can be calculated step by step by expression (1): (1) Wherein, is the voltage of node i in the k-th iteration, with the unit of p.u. or kV; denotes taking the conjugate, e.g., is the conjugate of; is the conjugate of the complex power load of node i, with the unit of MVA or p.u.; is the branch current generated by the complex power load of node i in the k-th iteration on the upstream branch (branch j→i), with the unit of kA or p.u.; is the real part of, representing the active power load of the node, is the imaginary part of, representing the reactive power load of the node. The branch current generated by the complex power load of node i in the k-th iteration on the upstream branch is the load current of node i. In the network topology, node j is closer to the root node and node i is closer to the end node. Node j is the upper-level node of node i, i.e., the parent node, and node i is the child node of node j.

[0038] Based on this, for branch j→i, the branch current is the sum of the load current of node i and the branch currents of all downstream branches, as shown in expression (2): (2) Wherein, is the branch current of branch j→i in the k-th iteration, with the unit of kA or p.u.; is the branch currents of all branches between node i and its child nodes, with the unit of kA or p.u. It should be noted that m is the child node of node i.

[0039] Based on expressions (1) and (2), the branch current of each node on the upstream branch can be iteratively deduced.

[0040] ② According to the known voltage, branch current, and branch impedance of the node corresponding to the root node, calculate the voltages of each node step by step along the direction from the root node to the end node.

[0041] In some embodiments, for branch j→i, the voltage of node i in the (k + 1)-th iteration is calculated by expression (3): (3) Wherein, is the voltage of node j in the (k + 1)-th iteration, with the unit of kV or p.u.; is the voltage of node i in the (k + 1)-th iteration, with the unit of kV or p.u.; is the branch impedance of branch j→i, with the unit of Ω or p.u.; can be obtained from the previous step ①.

[0042] Through steps ① and ②, by continuously iterating through the backtracking method of previous generations, the current of each branch and the voltage of each node in the entire network topology can be obtained, and thus the power flow matrix can be calculated: (4) Among them, is the power flowing from node j to node i, with the unit of MVA or p.u.; is the conjugate of the branch current between node j and node i finally determined after the iteration is completed, is the voltage of node j finally determined after the iteration is completed.

[0043] It can be understood that the power flow matrix represents the power flow situation in the network topology, thus serving as the data basis for the allocation of the responsibility for electricity carbon emissions in subsequent steps.

[0044] The node heat parameters refer to the parameters related to the heat supply of each node. Based on the node heat parameters, the heat consumption / demand of users can be described, and thus the subsequent heat carbon emission intensity can be further calculated based on data such as heat consumption / demand. Specifically, the node heat parameters can include the actual heat consumption corresponding to each node, the heat loss of the branches between nodes, and the heat transfer amount of the branches between nodes.

[0045] In some embodiments, the node heat parameters can also include the specific enthalpy (referring to the inherent energy per unit mass of the heat medium) and mass of the heat medium at different positions in the park network topology previously obtained through relevant measuring devices.

[0046] In this embodiment, the various sources in the park include power supply sources and heat supply sources. Among them, the power supply sources can include self-owned power plants, connected external power grids, and wind farms, etc., and the heat supply sources can include self-owned power plants and connected external heat supplies. Correspondingly, the units refer to the power generation (or heat generation) equipment corresponding to the sources, such as new energy units (corresponding to wind farms), fossil fuel units (corresponding to self-owned power plants), etc. Among them, since self-owned power plants usually burn fossil fuels for energy supply, the self-owned power plants in the park can not only supply power but also use a part of the heat energy for the heat supply in the park. That is to say, in addition to the externally connected heat supply, the heat supply source in the park can also be the heat supply from the self-owned power plant.

[0047] Each power supply source in the park can have its own power supply carbon emission intensity, and each heat supply source can have its own heat supply carbon emission intensity. The carbon emission intensities of the external power grid and external heat supply can be obtained according to the officially announced data and do not need to be calculated separately, while the carbon emission intensity of clean energy such as wind farms can be calculated as 0. Therefore, in this embodiment, only the carbon emission intensity of the self-owned power plant as a source needs to be calculated.

[0048] In some embodiments, the total carbon emission level corresponding to the self-provided power plant in the park during the specified period can be calculated by the expression (5): (5) Wherein, is the total carbon emission level of the self-provided power plant during the specified period t, is the number of fuel types, is the fuel consumption of the i-th fuel during the specified period t, is the carbon content of the i-th fuel used during the specified period t, is the carbon oxidation rate of the i-th fuel used during the specified period t; Based on the heat supply ratio of the self-provided power plant during the specified period, calculate the carbon emission intensity of power supply and the carbon emission intensity of heat supply; specifically, calculate the carbon emission of power supply through the expression (6) : (6) Calculate the carbon emission of heat supply through the expression (7) : (7) Wherein, is the heat supply ratio of the self-provided power plant during the specified period t.

[0049] Then, the ratio of the carbon emission of power supply to the output power of the self-provided power plant during the specified period is determined as the carbon emission intensity of power supply of the self-provided power plant; the ratio of the carbon emission of heat supply to the output heat of the self-provided power plant during the specified period is determined as the carbon emission intensity of heat supply of the self-provided power plant.

[0050] Step S120, for any node, calculate the heat consumption carbon emission intensity of the node according to the heat loss of the branch between nodes, the heat transfer amount of the branch between nodes, the actual heat consumption corresponding to the node, and the heat supply carbon emission intensity of each source in the park.

[0051] The total injected heat of the node can be calculated according to the first heat injected by the unit connected to the node and the second heat flowing in from each upper node of the node; wherein, the second heat is the product of the mass of the heat medium flowing into the node from the upper node and the specific enthalpy of the heat medium.

[0052] Exemplarily, the total injected heat of node i can be calculated by the expression (8): (8) Wherein, is the total injected heat of node i, is the first heat injected by the unit connected to the node, is the mass of the heat medium flowing into node i through node j, is the specific enthalpy of the heat medium, i.e., the second heat quantity, is the upper-level node of node i.

[0053] The heat loss between the upper-level node and the node can be calculated based on the mass of the heat medium flowing into the node from the upper-level node, the specific enthalpy of the heat medium at the node inlet, and the specific enthalpy of the heat medium at the upper-level node outlet.

[0054] Exemplarily, the heat loss during the process of the heat medium flowing from node j to node i is calculated through expression (9): (9) where, is the heat loss from node j to node i, is the specific enthalpy of the heat medium at the inlet of node i, is the specific enthalpy of the heat medium at the outlet of node j.

[0055] The branch carbon emission intensity between nodes can be calculated based on the carbon emissions borne by the heat supply of the branch between nodes and the heat transfer amount of the branch between nodes.

[0056] Exemplarily, the branch carbon emission intensity between node j and node i is calculated through expression (10): (10) where, is the branch carbon emission intensity of branch j-i, is the carbon dioxide emission corresponding to the heat transferred by branch j-i, , are respectively the heat supply carbon emission intensity and the heat supply amount (which can be monitored) from each heat supply source unit for the heat transfer from node j to node i. If node j is the source-end node (the top-level node), then there is only n = 1; is the heat transferred by branch j-i.

[0057] The heat load of the node is calculated through expression (11): (11) where, is the heat load of the node, is the specific enthalpy of the heat medium at the inlet of the heat medium at node i, is the specific enthalpy of the heat medium at the outlet of the heat medium; is the mass of the heat medium passing through node i.

[0058] Then, the ratio of the total inflow carbon emissions of a node to the total inflow heat of the node is used as the heat consumption carbon emission intensity of the node. Among them, the total inflow carbon emissions include the carbon emissions corresponding to all the branches between nodes with the node as the end of the branch and the emissions injected by the units. The carbon emissions corresponding to the branches are calculated based on the branch carbon emission intensity, heat transfer amount, and heat loss of the branches between nodes, and the emissions injected by the units are calculated based on the heat supply carbon emission intensity of the units accessed by the node and the first heat amount.

[0059] Exemplarily, the heat consumption carbon emission intensity of node i can be calculated through Expression (12).

[0060] (12) Among them, is the branch carbon emission intensity from node j to node i, is the heat supply amount transmitted from node j to node i, is the heat loss generated from node j to node i, is the upper-level node of node i; is the carbon emission intensity of the heat supply equipment of node i, is the heat supply amount provided by the heat supply equipment of node i.

[0061] In this embodiment, since a node can include multiple actual users, for any target user, the product of the actual heat consumption of the target user and the heat consumption carbon emission intensity of the node where the target user is located can be used as the heat consumption carbon emission sharing value of the target user.

[0062] Step S130, for any node, based on the electricity load of the node, the active power flow situation between each node, and the power supply carbon emission intensity of each source in the park, calculate the electricity consumption carbon emission intensity of the node.

[0063] In this embodiment, for any node, according to the sum of the active power injection of the generator sets accessed by the node and the total inflow power from other connected nodes to the node, calculate the total injection power of the node. Exemplarily, the total injection power of node i can be calculated through Expression (13): (13) Among them, is the total injection power of node i, is the active power injected by node i's own power generation, is the upper-level node of node i, is the power flowing from node j to node i; node j is any one of the upper-level nodes of node i.

[0064] Then, according to the total injection power of the nodes and the power flow conditions between the nodes, the node backtracking matrix of the nodes is calculated; the node backtracking matrix is used to describe the proportion of the total injection power of the upper-level nodes (such as j) that flows into the current node (such as i).

[0065] Specifically, without considering line losses, there is , let , be the power flowing from node j to node i accounting for the proportion of the total injection power of node j , substituting it back into expression (13) gives expression (14): (14) Converting to matrix form, expression (15) is obtained: (15) wherein, is the column vector of the total injection power of n nodes, is the column vector of the power generation, is the node backtracking matrix. Taking the branch j-i as an example, the elements in the node backtracking matrix are:

[0066] If (i.e., the inverse matrix of matrix ) exists, then expression (15) can be further transformed into expression (16): (16) Then, the node load of each node is obtained through the node detection device and used as the element of the load matrix to obtain the load matrix L. Combining the total injection power S of the nodes mentioned above, the load ratio of the nodes is calculated to form a diagonal matrix B. As shown in expression (17): (17) wherein, B is a diagonal matrix, and its diagonal elements are the load ratios of each node (i.e., the ratio of the node load to the total injection power). For example, the i-th diagonal element can be the node load of the i-th node and its corresponding total injection power ratio. Thus, the load matrix can be expressed as a linear combination of the injections of each unit, as shown in expression (18): (18) Combining the power supply carbon emission intensity, load ratio, and node backtracking matrix of each source in the park obtained in step S110, the electricity consumption carbon emission intensity of this node can be calculated through expression (19): (19) Among them, is the electricity consumption carbon emission intensity of this node, which is used to characterize the load ratio, is the node backtracking matrix, which is used to characterize the total sum of power supply carbon emissions from various sources in the park, refers to the power supply carbon emission intensity of each source (such as unit type). As mentioned above, the carbon emission intensity of grid power supply is known, the carbon emission intensity of new energy units is 0, and the power supply carbon emission intensity of the self-provided power grid can be calculated from the relevant parts in step S110. Substituting all the above parameters into expression (19) can obtain the electricity consumption carbon emission intensity of the node.

[0067] In some embodiments, when the acquisition equipment in the park is very limited, that is, the collected relevant data cannot support the calculation method in the above embodiments, it can be simplified to that the park is a single node, and the whole park shares a set of power carbon emission intensity. Each user (node) in the park shares the electricity consumption carbon emission according to the proportion of its electricity consumption in the total electricity consumption of the whole park. The power carbon emission intensity of the park can be calculated through expression (20): (20) Among them, is the power carbon emission intensity of the whole park, is the carbon emission intensity of the self-provided power plant, is the carbon emission intensity of the grid connection, is the carbon emission intensity of the distributed power generation group; is the power generation of the self-provided power plant, is the power input of the grid, is the power generation of the distributed power generation group, and the distributed power generation group includes the aforementioned new energy units, etc.

[0068] Calculate the electricity consumption carbon emission sharing amount of the user (node) through expression (21): (21) Among them, is the electricity consumption carbon emission sharing amount of the user (node), is the electricity consumption of the user (node).

[0069] In some embodiments, when the acquisition equipment in the park is very sufficient, the line loss during the line transmission process can also be fully considered. That is, the line loss generated from node j to node i is used as an additional load and added to the node load of node i, so as to calculate a more accurate load ratio, and then obtain a more accurate power carbon emission intensity.

[0070] Finally, the sum of the electricity consumption of the user (node) and the line loss power consumption allocated to the user (node) can be multiplied by the calculated carbon emission intensity of electricity to obtain the allocated carbon emissions of the user (node) for electricity consumption.

[0071] In this embodiment, since a node may include multiple actual users, for any target user, the product of the actual electricity consumption of the target user and the carbon emission intensity of electricity of the node where the target user is located can be used as the allocated value of the carbon emissions of the target user for electricity consumption.

[0072] This embodiment provides a carbon emission assessment method. Based on the node power parameters, node heat parameters, heat supply carbon emission intensities from various sources in the park, and power supply carbon emission intensities from various sources in the park, for any node, according to the heat loss of the branch between nodes, the heat transfer amount of the branch between nodes, the actual heat consumption corresponding to the node, and the heat supply carbon emission intensities from various sources in the park, calculate the carbon emission intensity of heat consumption of the node; based on the electricity load of each node, the active power flow between nodes, and the power supply carbon emission intensities from various sources in the park, calculate the carbon emission intensity of electricity consumption of the node, thereby effectively transferring the carbon emission responsibilities of electric power and heat resources to specific nodes, helping the users corresponding to the nodes understand the cleanliness of energy use, and providing a basic signal for users' low-carbon response.

[0073] As Figure 2 shown, in some embodiments, after step S130, the carbon emission assessment method may further include the following steps S140 to S160.

[0074] Step S140, for any node, calculate the carbon dioxide emission equivalent of the node based on the carbon dioxide emission equivalent corresponding to non-carbon dioxide greenhouse gases, the carbon emission intensity of heat consumption, the carbon emission intensity of electricity consumption, the electricity consumption of the node, and the heat consumption of the node.

[0075] To more comprehensively measure carbon emissions, the carbon dioxide emission equivalent corresponding to greenhouse gases other than carbon dioxide can be calculated in combination with expression (22): (22) Where is the carbon dioxide emission equivalent corresponding to the i-th type of non-carbon dioxide greenhouse gas; is the actual emission amount of the i-th type of non-carbon dioxide greenhouse gas, in tons; is the global warming potential of the i-th type of greenhouse gas, in tCO 2e / t.

[0076] Based on this, the carbon dioxide emission equivalent of the node (or user) can be obtained, which is expressed by expression (23): (23) Among them, is the carbon dioxide emission equivalent generated by the node (or user), is the carbon emission sharing value for electricity consumption, is the carbon emission sharing value for heat consumption, is the sum of the carbon dioxide emission equivalents corresponding to n types of non-carbon dioxide greenhouse gases.

[0077] Step S150, calculate the carbon emission intensity per unit output value within the specified period according to the ratio of the carbon dioxide emission equivalent of the node to the industrial production added value of the node within the specified period.

[0078] Assuming the user is an enterprise, the industrial production added value of the enterprise within the specified period can be counted, and the carbon emission intensity per unit output value is calculated through the expression (24): (24) Among them, is the carbon emission intensity per unit output value; is the industrial production added value of the enterprise within the specified period.

[0079] Step S160, calculate the product carbon footprint level within the specified period according to the ratio of the carbon dioxide emission equivalent of the node to the product output of the node within the specified period.

[0080] The product output of the enterprise within the specified period can be counted, and combined with the total carbon dioxide emission equivalent, the carbon footprint level per unit product is calculated through the expression (25): (25) Among them, is the carbon footprint level per unit product; is the product output of the user within the specified period.

[0081] Through the above steps S140 to S160, for an enterprise, it can help the enterprise establish carbon evaluation indicators, and use the total carbon emissions as the basic data for the carbon evaluation indicators of the park users; the corresponding carbon emission intensity can be used as the basis for responding to the carbon emission intensity assessment; the carbon footprint can provide a basic basis for the establishment of the enterprise product carbon label and carbon footprint, and the indicator system provides a basic indicator system for the enterprise to respond to relevant assessments, formulate its own carbon emission targets, and relevant assessments for product import and export.

[0082] The present application provides a carbon emission assessment device, and the carbon emission assessment device includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein, the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the carbon emission assessment method in the first embodiment above.

[0083] Refer to the following Figure 3 , which shows a schematic structural diagram of a carbon emission assessment device suitable for implementing the embodiments of the present application. The carbon emission assessment device in the embodiments of the present application may include, but is not limited to, mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistant), PADs (Portable Application Description: tablet computers), PMPs (Portable Media Player), vehicle terminals (such as vehicle navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 3 The shown carbon emission assessment device is only an example and should not impose any limitations on the functions and usage scope of the embodiments of the present application.

[0084] As Figure 3 shown, the carbon emission assessment device 100 may include a processing device 110 (such as a central processing unit, a graphics processing unit, etc.), which may perform various appropriate actions and processes according to the program stored in the read-only memory (ROM: Read Only Memory) 120 or the program loaded from the storage device 130 into the random access memory (RAM: Random Access Memory) 140. In the RAM 140, various programs and data required for the operation of the carbon emission assessment device are also stored. The processing device 110, the ROM 120, and the RAM 140 are connected to each other through a bus 150. The input / output (I / O) interface 160 is also connected to the bus. Generally, the following systems may be connected to the I / O interface 160: an input device 170 including, for example, a touch screen, a touch pad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; an output device 180 including, for example, a liquid crystal display (LCD: Liquid Crystal Display), a speaker, a vibrator, etc.; a storage device 130 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 190. The communication device 190 may allow the carbon emission assessment device to communicate with other devices wirelessly or wiredly to exchange data. Although the figure shows a carbon emission assessment device with various systems, it should be understood that it is not required to implement or have all the shown systems. More or fewer systems may be alternatively implemented or had.

[0085] In particular, according to the embodiments disclosed in the present application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, the embodiments disclosed in the present application include a computer program product that includes a computer program carried on a computer-readable medium, and the computer program contains program codes for performing the methods shown in the flowcharts. In such an embodiment, the computer program can be downloaded and installed from a network through a communication device, or installed from a storage device 130, or installed from a ROM 120. When the computer program is executed by a processing device 110, the above functions defined in the methods of the embodiments disclosed in the present application are executed.

[0086] The carbon emission assessment device provided in the present application adopts the carbon emission assessment method in the above embodiment, and can solve the technical problem of how to reasonably divide the carbon emission responsibilities of the park. Compared with the prior art, the beneficial effects of the carbon emission assessment device provided in the present application are the same as those of the carbon emission assessment method provided in the above embodiment, and other technical features in the carbon emission assessment device are the same as the features disclosed in the method of the previous embodiment, which will not be elaborated here.

[0087] It should be understood that the various parts disclosed in the present application can be implemented by hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in a suitable manner in any one or more embodiments or examples.

[0088] As described above, the above are only the specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present application can easily think of changes or substitutions, which should all be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

[0089] The present application provides a computer-readable storage medium having computer-readable program instructions (i.e., computer programs) stored thereon, and the computer-readable program instructions are used to execute the carbon emission assessment method in the above embodiment.

[0090] The computer-readable storage medium provided by the present application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems or devices, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: electrical connections with one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM) or flash memory, optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the above. In this embodiment, the computer-readable storage medium may be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system or device. The program code contained on the computer-readable storage medium can be transmitted by any suitable medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination of the above.

[0091] The above computer-readable storage medium may be included in the carbon emission assessment device; or it may exist separately without being assembled into the carbon emission assessment device.

[0092] The above computer-readable storage medium carries one or more programs. When the above one or more programs are executed by the carbon emission assessment device, the carbon emission assessment device can write computer program code for performing the operations of the present application in one or more programming languages or combinations thereof. The above programming languages include object-oriented programming languages - such as Java, Smalltalk, C++; and also include conventional procedural programming languages - such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, executed as an independent software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer can be connected to the user's computer through any type of network - including a local area network (LAN) or a wide area network (WAN) - or can be connected to an external computer (for example, by using an Internet service provider to connect through the Internet).

[0093] The flowcharts and block diagrams in the accompanying drawings illustrate the possible architectures, functions, and operations of systems, methods, and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagram may represent a module, a segment of a program, or a portion of code that contains one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions noted in the blocks may occur in a different order than that noted in the accompanying drawings. For example, two consecutive blocks shown may actually be executed substantially in parallel, and they may sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each block in the block diagram and / or flowchart, and combinations of blocks in the block diagram and / or flowchart, may be implemented by a dedicated hardware-based system that performs the specified functions or operations, or may be implemented by a combination of dedicated hardware and computer instructions.

[0094] The modules described in the embodiments of the present application can be implemented in software or in hardware. In some cases, the name of the module does not constitute a limitation on the unit itself.

[0095] The readable storage medium provided by the present application is a computer-readable storage medium, and the computer-readable storage medium stores computer-readable program instructions (i.e., computer programs) for executing the above-mentioned carbon emission assessment method, which can solve the technical problem of how to reasonably divide the carbon emission responsibility of the park. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided by the present application are the same as those of the carbon emission assessment method provided by the above embodiments, and will not be elaborated here.

[0096] The present application also provides a computer program product, including a computer program, and when the computer program is executed by a processor, it implements the steps of the carbon emission assessment method as described above.

[0097] The computer program product provided by the present application can solve the technical problem of how to reasonably divide the carbon emission responsibility of the park. Compared with the prior art, the beneficial effects of the computer program product provided by the present application are the same as those of the carbon emission assessment method provided by the above embodiments, and will not be elaborated here.

[0098] The above are only some embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structural transformation made under the technical concept of the present application by using the content of the specification and drawings of the present application, or any direct / indirect application in other related technical fields, is included in the patent protection scope of the present application.

Claims

1. A carbon emission assessment method, characterized in that, The carbon emission assessment method includes: Obtaining the node power parameters and node heat parameters of the park, as well as the power supply carbon emission intensity from each source in the park and the heating carbon emission intensity from each source in the park; wherein, the node power parameters include the electricity consumption load of each node and the active power flow situation between each node; the node heat parameters include the actual heat consumption corresponding to each node, the heat loss of the branches between each node, and the heat transfer amount of the branches between each node; For any node, calculate the heat consumption carbon emission intensity of the node according to the heat loss of the branches between each node, the heat transfer amount of the branches between each node, the actual heat consumption corresponding to the node, and the heating carbon emission intensity from each source in the park; For any node, calculate the electricity consumption carbon emission intensity of the node based on the electricity consumption load of the node, the active power flow situation between each node, and the power supply carbon emission intensity from each source in the park.

2. The carbon emission assessment method according to claim 1, wherein After calculating the electricity consumption carbon emission intensity of the node for any node based on the electricity consumption load of the node, the active power flow situation between each node, and the power supply carbon emission intensity from each source in the park, the carbon emission assessment method further includes: For any node, calculate the carbon dioxide emission equivalent of the node based on the carbon dioxide emission equivalent corresponding to non-carbon dioxide greenhouse gases, the heat consumption carbon emission intensity, the electricity consumption carbon emission intensity, the electricity consumption of the node, and the heat consumption of the node; wherein, the carbon dioxide emission equivalent corresponding to non-carbon dioxide greenhouse gases is calculated based on the global warming potential of each non-carbon dioxide greenhouse gas and the corresponding actual emissions; Calculate the carbon emission intensity per unit output value during the specified period based on the ratio of the carbon dioxide emission equivalent of the node to the industrial production added value of the node during the specified period; Calculate the product carbon footprint level during the specified period based on the ratio of the carbon dioxide emission equivalent of the node to the product output of the node during the specified period.

3. The carbon emission assessment method according to claim 1, wherein The calculating the electricity consumption carbon emission intensity of the node for any node based on the electricity consumption load of each node, the active power flow situation between each node, and the power supply carbon emission intensity from each source in the park includes: For any node, calculate the total injection power of the node according to the sum of the active power injection of the generator set connected to the node and the total inflow power from other connected nodes to the node; Determine the power injection matrix of the node according to the total injection power of the node and the active power flow situation between each node; Calculate the backtracking matrix of the node according to the power injection matrix; Calculate the load ratio of the node according to the electricity consumption load corresponding to the node and the total injection power; Determine the electricity consumption carbon emission intensity of the node according to the power supply carbon emission intensity from each source in the park, the load ratio, and the backtracking matrix of the node.

4. The carbon emission assessment method according to claim 3, wherein The obtaining the node power parameters of the park includes: Construct a campus network topology, where the network topology is a directed graph, each node in the network topology corresponds to each node in the campus one by one, and each edge in the network topology is established according to the connection relationship between nodes; each edge in the network topology has a branch impedance; According to the power consumption load of each node, calculate the branch current of each branch between nodes level by level along the direction from the end node to the root node in the network topology; According to the known voltage of the node corresponding to the root node, the branch current, and the branch impedance, calculate the voltage of each node level by level along the direction from the root node to the end node; Determine the active power flow situation between each node according to each branch current and the voltage of each node.

5. The carbon emission assessment method according to claim 4, characterized in that, The node heat parameter also includes the specific enthalpy and mass of the heat medium at different positions in the campus network topology; Before calculating the heat consumption carbon emission intensity of the node according to the heat loss of each branch between nodes, the heat transfer amount of the branch between nodes, the actual heat consumption corresponding to the node, and the heat supply carbon emission intensity of each source in the campus, the carbon emission assessment method further includes: For any node, calculate the total injected heat of the node according to the first heat injected by the unit accessed by the node and the second heat flowing in through each branch between nodes; where the second heat is the product of the mass of the heat medium flowing into the node through the branch between nodes and the specific enthalpy of the heat medium; For any branch between nodes, calculate the heat loss of the branch between nodes according to the mass of the heat medium in the branch between nodes, the specific enthalpy of the heat medium at the end node of the branch, and the specific enthalpy of the heat medium at the outlet of the first segment node of the branch; Calculate the branch carbon emission intensity of the branch between nodes according to the carbon emission carried by the heat supply of the branch between nodes and the heat transfer amount of the branch between nodes; Calculating the heat consumption carbon emission intensity of the node according to the heat loss of each branch between nodes, the heat transfer amount of the branch between nodes, the actual heat consumption corresponding to the node, and the heat supply carbon emission intensity of each source in the campus includes: Taking the ratio of the total inflow carbon emission of the node to the total inflow heat of the node as the heat consumption carbon emission intensity of the node; where the total inflow carbon emission includes the carbon emissions corresponding to all branches between nodes with the node as the end of the branch and the injection emissions of the unit, the carbon emissions corresponding to the branch are calculated based on the branch carbon emission intensity, heat transfer amount, and heat loss of the branch between nodes, and the injection emissions of the unit are calculated based on the heat supply carbon emission intensity of the unit accessed by the node and the first heat.

6. The carbon emission assessment method according to claim 5, wherein The carbon emission assessment method further includes: Taking the product of the actual power consumption of the target user and the electricity consumption carbon emission intensity of the node where the target user is located as the electricity consumption carbon emission sharing value of the target user; Taking the product of the actual heat consumption of the target user and the heat consumption carbon emission intensity of the node where the target user is located as the heat consumption carbon emission sharing value of the target user.

7. The carbon emission assessment method according to any one of claims 1-6, characterized in that The power supply source and heat supply source of the park include a self-owned power plant; before obtaining the node power parameters and node heat parameters of the park, as well as the power supply carbon emission intensity of each source in the park and the heat supply carbon emission intensity of each source in the park, the carbon emission assessment method further includes: Calculating the carbon emission level of the self-owned power plant based on the carbon content, carbon oxidation rate, and fuel consumption of various types of fuels used by the self-owned power plant; Calculating the power supply carbon emission and heat supply carbon emission based on the heat supply ratio of the self-owned power plant and the carbon emission level of the self-owned power plant; Determining the power supply carbon emission intensity of the self-owned power plant by dividing the power supply carbon emission by the output power of the self-owned power plant; Determining the heat supply carbon emission intensity of the self-owned power plant by dividing the heat supply carbon emission by the output heat of the self-owned power plant.

8. An equipment for carbon emission assessment, characterized in that, The carbon emission assessment device includes: a memory, a processor, and a computer program stored on the memory and executable on the processor, and the computer program is configured to implement the steps of the carbon emission assessment method according to any one of claims 1 to 7.

9. A storage medium, characterized in that, The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium, and when the computer program is executed by a processor, it implements the steps of the carbon emission assessment method according to any one of claims 1 to 7.

10. A computer program product, characterized in that, The computer program product includes a computer program, and when the computer program is executed by a processor, it implements the steps of the carbon emission assessment method according to any one of claims 1 to 7.

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