Carbon emission assessment methods, equipment, storage media and products

Abstract

The present application discloses a carbon emission assessment method, device, storage medium and product, and relates to the field of carbon emission technology. The present application is based on node power parameters, node heat parameters, heating carbon emission intensity of various sources in the park, and power supply carbon emission intensity of various sources in the park. For any node, the heat loss of the branches between each node, the heat transfer amount of the branches between nodes, the actual heat consumption corresponding to the node, and the heating carbon emission intensity of various sources in the park are calculated; based on the power load of each node, the active power flow between each node, and the power supply carbon emission intensity of various sources in the park, the power consumption carbon emission intensity of the node is calculated, thereby effectively transmitting the carbon emission responsibility of electricity and thermal resources to specific nodes, helping users corresponding to the nodes understand the cleanliness of energy use, and providing basic signals for users' low-carbon response.

Description

Technical Field

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

[0002] With the increasing digitalization and intelligence of industrial parks, energy consumption monitoring is trending towards online, high-frequency, and granular monitoring. However, complex industrial parks, especially those with self-contained power plants, involve energy processing, conversion, and transmission, making it difficult to accurately allocate carbon emission responsibilities and transmit them to end users.

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

[0004] The main purpose of this application is to provide a carbon emission assessment method, equipment, 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 objectives, this application proposes a carbon emission assessment method, which includes:

[0006] Obtain the node power parameters and node heat parameters of the park, as well as the carbon emission intensity of power supply and heat supply from various sources in the park; the node power parameters include the power load of each node and the active power flow between nodes; the node heat parameters include the actual heat consumption corresponding to each node, the heat loss of the branches between nodes, and the heat transfer of the branches between nodes;

[0007] For any node, calculate the heat carbon emission intensity of the node based on the heat loss of the branches between nodes, the heat transfer volume of the branches between nodes, the actual heat consumption of the node, and the carbon emission intensity of heating from various sources in the park;

[0008] For any node, the carbon emission intensity of electricity consumption of the node is calculated based on the node's power load, the active power flow between nodes, and the carbon emission intensity of power supply from various sources in the park.

[0009] In some embodiments, after calculating the carbon emission intensity of electricity consumption of any node based on the power load of each node, the active power flow between the nodes, and the carbon emission intensity of power supply from various sources in the park, the carbon emission assessment method further includes:

[0010] For any node, calculate the CO2 emissions equivalent of the node based on the corresponding CO2 emissions equivalent of the non-CO2 greenhouse gases, the carbon emissions intensity of heat use, the carbon emissions intensity of electricity use, the node's electricity consumption, and the node's heat use; wherein the corresponding CO2 emissions equivalent of the non-CO2 greenhouse gases are calculated based on the global warming potential of each non-CO2 greenhouse gas and the corresponding actual emissions;

[0011] Calculate the carbon emission intensity per unit of output value within a specified period based on the ratio of the carbon dioxide emission equivalent of the node to the industrial production added value of the node within a specified period;

[0012] The carbon footprint level of the product in the specified period is calculated based on the ratio of the carbon dioxide emission equivalent of the node to the product output of the node in the specified period.

[0013] In some embodiments, calculating the electricity carbon emission intensity of any node based on the node's power load, active power flow between nodes, and the carbon emission intensity of power supply from various sources in the park includes:

[0014] For any node, calculate the total injected power of the node based on the active power injected by the generator set connected to the node and the total power flowing into the node from other connected nodes;

[0015] Determining a power injection matrix for the node according to the total injected power of the node and the active power flow between the nodes;

[0016] Calculating a backtracking matrix of the node according to the power injection matrix;

[0017] Calculate the load proportion of the node according to the power load corresponding to the node and the total injected power;

[0018] The carbon emission intensity of electricity consumption of the node is determined according to the carbon emission intensity of power supply from various sources in the park, the load proportion, and the backtracking matrix of the node.

[0019] In some embodiments, obtaining the node power parameters of the park includes:

[0020] Constructing a campus network topology, wherein the network topology is a directed graph, each node in the network topology corresponds one-to-one to each node in the campus, each edge in the network topology is established based on a connection relationship between nodes, and each edge in the network topology has a branch impedance;

[0021] According to the power load of each node, 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;

[0022] Calculating the voltage of each node step by step along the direction from the root node to the terminal node according to the known voltage of the node corresponding to the root node, the branch current, and the branch impedance;

[0023] Active power flow conditions between the nodes are determined based on the branch currents and the voltages of the nodes.

[0024] In some embodiments, the node thermal parameters further include specific enthalpy and mass of the heat medium at different locations in the campus network topology;

[0025] Before calculating the heat carbon emission intensity of the node based on the heat loss of each inter-node branch, the heat transfer amount of the inter-node branch, the actual heat consumption corresponding to the node, and the carbon emission intensity of heating from each source in the park, the carbon emission assessment method further includes:

[0026] 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. 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.

[0027] For any inter-node branch, calculate the heat loss of the inter-node branch based on 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;

[0028] 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;

[0029] The heat carbon emission intensity of the node is calculated based on the heat loss of the branches between the nodes, the heat transfer amount of the branches between the nodes, the actual heat consumption corresponding to the node, and the carbon emission intensity of the heating from various sources in the park, including:

[0030] The ratio of the total inflow carbon emissions of the node to the total inflow heat of the node is used 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.

[0031] In some embodiments, the carbon emissions assessment method further comprises:

[0032] The product of the target user's actual electricity consumption and the electricity carbon emission intensity of the node where the target user is located is used as the target user's electricity carbon emission apportionment value;

[0033] 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 used as the heat carbon emission apportionment value of the target user.

[0034] In some embodiments, the power supply and heat supply sources 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 carbon emission intensity of each power supply source and the carbon emission intensity of each heat supply source in the park, the carbon emission assessment method further includes:

[0035] Calculate the carbon emission level of the captive power plant by using the carbon content, carbon oxidation rate and fuel consumption of various types of fuel used by the captive power plant;

[0036] Calculating power supply carbon emissions and heating carbon emissions based on the heat supply ratio of the self-provided power plant and the carbon emission level of the self-provided power plant;

[0037] The ratio of the power supply carbon emissions to the output power of the self-provided power plant is determined as the power supply carbon emission intensity of the self-provided power plant;

[0038] The ratio of the heating carbon emissions to the output heat of the self-provided power plant is determined as the heating carbon emission intensity of the self-provided power plant.

[0039] In addition, to achieve the above-mentioned purpose, the present application also proposes a carbon emission assessment device, which includes: a memory, a processor, and a computer program stored in the memory and runnable on the processor, wherein the computer program is configured to implement the steps of the carbon emission assessment method as described above.

[0040] In addition, to achieve the above-mentioned purpose, the present application also proposes a storage medium, which is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by the processor, the steps of the carbon emission assessment method described above are implemented.

[0041] In addition, to achieve the above objectives, 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.

[0042] One or more technical solutions proposed in this application have at least the following technical effects:

[0043] Based on the node power parameters, node heat parameters, the carbon emission intensity of heating from various sources in the park, and the carbon emission intensity of electricity supply from various sources in the park, for any node, the heat carbon emission intensity of the node is calculated according to the heat loss of the branches between each node, the heat transfer amount of the branches between nodes, the actual heat consumption corresponding to the node, and the carbon emission intensity of heating from various sources in the park; based on the power load of each node, the active power flow between each node, and the carbon emission intensity of electricity supply from various sources in the park, the carbon emission intensity of electricity consumption of the node is calculated, so as to effectively transmit the carbon emission responsibility of electricity and heat resources to specific nodes, help users corresponding to the nodes understand the cleanliness of energy use, and provide basic signals for users' low-carbon response. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0045] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0046] Figure 1 A schematic diagram of a process for carbon emission assessment according to an embodiment of the present application is shown;

[0047] Figure 2 A schematic diagram of a process for carbon emission assessment provided by another embodiment of the present application is shown;

[0048] Figure 3 A structural schematic diagram of a carbon emission assessment device provided in one embodiment of the present application is shown.

[0049] The purpose, features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0050] It should be understood that the specific embodiments described herein are merely used to explain the technical solutions of the present application and are not intended to limit the present application.

[0051] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0052] The main solution of the embodiment of the present application is: to obtain 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 power load of each node and the active power flow 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 of the branches between each node; for any node, the heating carbon emission intensity of the node is calculated based on the heat loss of the branches between each node, the heat transfer of the branches between the nodes, the actual heat consumption corresponding to the node and the heating carbon emission intensity of each source in the park; for any node, the power carbon emission intensity of the node is calculated based on the power load of each node, the active power flow between each node and the power supply carbon emission intensity of each source in the park.

[0053] With the increasing digitalization and intelligence of industrial parks, energy consumption monitoring is trending towards online, high-frequency, and granular monitoring. However, complex industrial parks, especially those with self-contained power plants, involve energy processing, conversion, and transmission, making it difficult to accurately allocate carbon emission responsibilities and transmit them to end users.

[0054] In summary, how to reasonably divide the carbon emission responsibilities of the park is an issue that needs to be urgently addressed.

[0055] Based on this, this application provides a solution that enables park users to measure their own carbon emission levels more reasonably, accurately and frequently, prompting users in the park to better respond to the call for energy conservation, emission reduction and sustainable development.

[0056] It should be noted that the execution entity of this embodiment can be a computing service device with data processing, network communication, and program execution capabilities, such as a tablet computer, personal computer, or mobile phone, or a carbon emission assessment device capable of performing the aforementioned functions. This embodiment and the following embodiments will be described below using a carbon emission assessment device as an example.

[0057] Reference Figure 1 , Figure 1 The flowchart of the carbon emission assessment method provided by an embodiment of the present application is shown. The carbon emission assessment method can be applied to a carbon emission assessment device, including the following steps S110 to S130:

[0058] Step S110 , obtaining node power parameters and node heat parameters of the park, as well as the carbon emission intensity of power supply from various sources in the park and the carbon emission intensity of heating from various sources in the park.

[0059] There may be multiple nodes in the park, each of which may be an electricity / heat consuming unit, such as a factory; each node may also have multiple users, for example, a factory building may be planned for multiple users to use.

[0060] In some implementations, different schemes for acquiring node power parameters can be designed based on the completeness of the data collection equipment in the park. In some possible scenarios, the park may not have many data collection devices, and only relevant parameters of a portion of the nodes can be collected; in other possible scenarios, the park may have very few data collection devices, and the collected relevant parameters may not support the carbon emission calculation in the embodiments of this application; in still other possible scenarios, the park may have sufficient data collection equipment to fully collect various relevant parameters, and there is no need to perform relevant calculations using the methods listed below, and they can be used directly.

[0061] Node power parameters refer to parameters related to the power consumption of each node within the park. Specifically, node power parameters include the power load of each node and the active power flow between nodes.

[0062] If a park has limited data collection equipment but is able to acquire relevant data from key nodes, a park network topology can be constructed for the park. It is understood that the park can include a dedicated power access node, which serves as the root node in the network topology. The root node can be connected to a transmission network such as the State Grid, or to the park's own power plant (i.e., a power plant built within the park that generates electricity using fossil fuels) for power supply. Furthermore, it can also be connected to new energy generators within the park, although this is not limited in this embodiment.

[0063] Each node in the network topology corresponds one-to-one to each node in the park, and each edge in the network topology is established based on the connection relationship between the nodes.

[0064] As you can understand, to deliver power from the root node to all nodes within the campus, a transmission network, such as high-voltage transmission lines, is required. A well-designed transmission network can achieve full coverage of all nodes, starting with the root node. Therefore, a topological network consists of multiple directed edges extending from the root node to the terminal node (the end node of the power supply line), forming a directed graph.

[0065] Each edge in a network topology has a branch impedance, and each node has an electrical load. In this embodiment, relevant equipment can be used to measure the branch impedance of the transmission line in real time, and relevant measurement equipment installed at the node can be used to measure the node's overall electrical load. The electrical load refers to the node's electrical load power.

[0066] The previous generation back-propagation method can be used to infer the information of the entire network topology through continuous iteration based on partial known information.

[0067] ① Based on the pre-collected complex power loads for at least some of the nodes, the branch currents of each internode branch are calculated step by step, from the terminal node to the root node in the network topology. An internode branch refers to a branch between any node and its parent node; some of the nodes include at least the terminal nodes. It is understood that if the complex power load of the terminal node is unknown, the complex power load of the parent node cannot be calculated.

[0068] Taking branch j→i as an example, in some embodiments, the branch current of each inter-node branch can be calculated step by step using expression (1):

[0069] (1)

[0070] in, is the voltage of node i in the kth iteration, in pu or kV; Indicates the conjugate, such as for conjugation of; is the conjugate of the node complex power load of node i, in MVA or pu; is the branch current generated by the complex power load of node i on the upper branch (branch j→i) in the kth iteration, in kA or pu; yes The real part of represents the active power load of the node, yes The imaginary part of represents the node's reactive power load. The branch current generated by node i's complex power load on the parent branch during the kth iteration is the load current of node i. In the network topology, node j is closer to the root node, while node i is closer to the peripheral node. Node j is the parent node of node i, and node i is the child node of node j.

[0071] Based on this, for branch j→i, the branch current is the sum of the load current of node i and the currents of all downstream branches, as shown in Expression (2):

[0072] (2)

[0073] in, is the branch current of branch j→i in the kth iteration, in kA or pu; is the total branch current between node i and its child nodes, in kA or pu. It should be noted that m is the child node of node i.

[0074] Based on expressions (1) and (2), the branch current of each node in the upper branch can be iteratively inferred.

[0075] ② Based on the known voltage, branch current, and branch impedance of the node corresponding to the root node, calculate the voltage of each node step by step along the direction from the root node to the terminal node.

[0076] In some embodiments, for branch j→i, the voltage at node i in the k+1th iteration is calculated by expression (3):

[0077] (3)

[0078] in, is the voltage at node j in the k+1th iteration, in kV or pu; is the voltage of node i in the k+1th iteration, in kV or pu; is the branch impedance of branch j→i, in Ω or pu; It can be calculated from the previous step ①.

[0079] Through steps ① and ②, and by iterating the previous generation back-stepping method, we can know the current of each branch and the voltage of each node in the entire network topology, and thus calculate the power flow matrix:

[0080] (4)

[0081] in, is the power flowing from node j to node i, in MVA or pu; 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.

[0082] It can be understood that the power flow matrix represents the flow of power in the network topology, and thus serves as the data basis for the allocation of electricity carbon emissions responsibility in subsequent steps.

[0083] Node heat parameters refer to parameters related to the heat supply at each node. These parameters can be used to describe a user's heat consumption / demand, allowing subsequent calculation of the carbon intensity of heat emissions based on this heat consumption / demand data. Specifically, these parameters include the actual heat consumption of each node, heat losses in branches between nodes, and heat transfer between branches between nodes.

[0084] In some embodiments, the node thermal parameters may further include the specific enthalpy (the energy inherent in a unit mass of the heat medium) and mass of the heat medium at different locations in the campus network topology, which are previously known through relevant measurement equipment.

[0085] In this embodiment, the various sources in the park include power supply sources and heat supply sources. Among them, the power supply sources may include self-owned power plants, connected external power grids and wind farms, etc., and the heat supply sources may include self-owned power plants and connected external heat. Correspondingly, the unit refers to the power generation (or heat generation) equipment corresponding to the source, for example, it can be a new energy unit (corresponding to a wind farm), a fossil fuel unit (corresponding to a self-owned power plant), 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 electricity, but also use part of the heat energy for heating in the park. In other words, in addition to external heat supply, the heat supply source of the park can also be the heat supply of the self-owned power plant.

[0086] Each power source within the park can have its own power supply carbon emission intensity, and each heat 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 from officially published data and do not need to be calculated separately. The carbon emission intensity of clean energy sources such as wind farms can be calculated as zero. Therefore, in this embodiment, only the carbon emission intensity of the self-owned power plant is calculated.

[0087] In some embodiments, the total carbon emission level of the park's self-owned power plant during a specified period can be calculated using Expression (5):

[0088] (5)

[0089] in, is the total carbon emission level of the captive power plant in a specified period t, is the number of fuel types, is the fuel consumption of the i-th fuel in the specified period t, is the carbon content of the i-th fuel used in the specified period t, is the carbon oxidation rate of the i-th fuel used in the specified time period t;

[0090] Based on the heat supply ratio of the self-owned power plant in a specified period, the carbon emission intensity of power supply and heat supply is calculated; specifically, the carbon emission of power supply is calculated by expression (6): :

[0091] (6)

[0092] Calculate the heating carbon emissions by expression (7): :

[0093] (7)

[0094] in, is the heat supply ratio of the captive power plant in the specified period t.

[0095] Then, the ratio of power supply carbon emissions to the output power of the self-contained power plant in a specified period of time is determined as the power supply carbon emission intensity of the self-contained power plant; the ratio of heat supply carbon emissions to the output heat of the self-contained power plant in a specified period of time is determined as the heat supply carbon emission intensity of the self-contained power plant.

[0096] Step S120 , for any node, calculate the heat carbon emission intensity of the node based on the heat loss of the branches between the nodes, the heat transfer amount of the branches between the nodes, the actual heat consumption corresponding to the node, and the heating carbon emission intensity of each source in the park.

[0097] The total injected heat of a node can be calculated based on the first heat injected by the node access unit and the second heat flowing in from each upper-level 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-level node and the specific enthalpy of the heat medium.

[0098] For example, the total injected heat of node i can be calculated by expression (8):

[0099] (8)

[0100] in, is the total injected heat of node i, The first heat injected into the unit at the node, is the mass of heat medium flowing from node j to node i, is the specific enthalpy of the heat medium, The second heat, is the parent node of node i.

[0101] The heat loss between the upper node and the node can be calculated based on the mass of the heat medium flowing into the node from the upper node, the specific enthalpy of the heat medium at the node inlet, and the specific enthalpy of the heat medium at the upper node outlet.

[0102] For example, the heat loss during the process of heat medium flowing from node j to node i is calculated by expression (9):

[0103] (9)

[0104] in, 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.

[0105] The branch carbon emission intensity of the inter-node branch can be calculated based on the carbon emissions carried by the heat supply of the inter-node branch and the heat transfer amount of the inter-node branch.

[0106] For example, the carbon emission intensity of the branch between node j and node i is calculated using expression (10):

[0107] (10)

[0108] in, is the branch carbon emission intensity of branch ji, The carbon dioxide emissions corresponding to the heat transmitted by the branch, 、 The carbon emission intensity and heat supply (which can be monitored) of each heat source unit that transmits heat from node j to node i are respectively. If node j is the source node (the top node), then only n=1; The heat transmitted by the branch circuit.

[0109] The heat load of the node is calculated by expression (11):

[0110] (11)

[0111] in, is the heat load of the node, 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 the node; is the mass of the heat medium passing through node i.

[0112] Then, the ratio of the total inflow carbon emissions of the node to the total inflow heat of the node is used as the heat carbon emission intensity of the node; among them, 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 and the first heat of the node connected to the unit.

[0113] For example, the heat carbon emission intensity of node i can be calculated by expression (12).

[0114] (12)

[0115] in, is the carbon emission intensity of the branch between node j and node i, is the heat transmitted from node j to node i, is the heat loss from node j to node i, is the parent node of node i; is the carbon emission intensity of the heating equipment at node i, The amount of heat provided to the heating equipment at node i.

[0116] In this embodiment, since a node may include multiple actual users, for any target user, the product of the target user's actual heat consumption and the heat carbon emission intensity of the node where the target user is located can be used as the target user's heat carbon emission apportionment value.

[0117] Step S130 , for any node, calculate the node's electricity carbon emission intensity based on the node's power load, the active power flow between nodes, and the power supply carbon emission intensity of each source in the park.

[0118] In this embodiment, for any node, the total injected power of the node is calculated based on the sum of the active power injected by the generator connected to the node and the total power flowing into the node from other connected nodes. For example, the total injected power of the node can be calculated by expression (13):

[0119] (13)

[0120] in, is the total injected power of node i, is the active power injected by node i itself, is the parent 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.

[0121] Then, based on the total injected power of the node and the power flow between nodes, the node backtracking matrix of the node is calculated; the node backtracking matrix is ​​used to describe the proportion of the total injected power of the previous level node (for example, j) that flows into the current node (for example, i).

[0122] Specifically, without considering line loss, there are ,set up , is the power flowing from node j to node i Total injected power of node j Substituting the ratio of , we can get the expression (14):

[0123] (14)

[0124] Converting into matrix form, we get expression (15):

[0125] (15)

[0126] in, is the column vector of the total injected power of n nodes, is the generated power column vector, is the node backtracking matrix. Taking branch ji as an example, the node backtracking matrix The elements in are:

[0127]

[0128] if (ie matrix If the inverse matrix of exists, then expression (15) can be transformed into expression (16):

[0129] (16)

[0130] Then, the node load of each node is obtained through the node detection equipment and used as the element of the load matrix to obtain the load matrix L. Combined with the total injected power S of the node mentioned above, the load proportion of the node is calculated to form a diagonal matrix B. As shown in Expression (17):

[0131] (17)

[0132] Where B is a diagonal matrix, and its diagonal elements are the load proportion of each node (i.e., the ratio of node load to total injected power). For example, the i-th diagonal element is The node load of the i-th node can be The corresponding total injection power Therefore, the load matrix can be expressed as a linear combination of the injection of each unit, as shown in expression (18):

[0133] (18)

[0134] Combining the power supply carbon emission intensity of each source in the park, the load proportion, and the node backtracking matrix obtained in step S110, the electricity carbon emission intensity of the node can be calculated using expression (19):

[0135] (19)

[0136] in, is the carbon emission intensity of electricity consumption at the node, Used to characterize the load ratio, is the node backtracking matrix, It is used to represent the total carbon emissions from power supply of various sources in the park. It refers to the carbon emission intensity of power supply from various sources (e.g., unit type). As mentioned above, the carbon emission intensity of power supply from the grid is known, the carbon emission intensity of new energy units is 0, and the carbon emission intensity of power supply from the self-contained grid can be calculated from the relevant parts in step S110. Substituting all the above parameters into expression (19) can obtain the carbon emission intensity of electricity consumption at the node.

[0137] In some implementations, when the collection equipment in a park is very limited, that is, the collected relevant data cannot support the calculation method in the above embodiment, the park can be simplified to a single node, and the entire park shares a set of electricity carbon emission intensity. Each user (node) in the park is allocated electricity carbon emissions according to the proportion of electricity consumption to the total electricity consumption of the park. The electricity carbon emission intensity of the park can be calculated using expression (20):

[0138] (20)

[0139] in, The carbon emission intensity of electricity for the entire park, is the carbon emission intensity of the captive power plant, The carbon emission intensity of the grid is is the carbon emission intensity of the distributed generation group; is the power generation of the self-owned power plant, is the power input to the grid, It is the power generation of distributed power generation groups, which include the aforementioned new energy units, etc.

[0140] The carbon emission apportionment of electricity consumption of users (nodes) is calculated by expression (21):

[0141] (twenty one)

[0142] in, The carbon emission apportionment of electricity consumption of users (nodes), The electricity consumption of users (nodes).

[0143] In some implementations, if a campus has sufficient data collection equipment, line losses during transmission can be fully accounted for. Specifically, the line losses from node j to node i are treated as additional load and added to the node load at node i, thereby calculating a more accurate load share and, consequently, a more accurate carbon emission intensity of electricity.

[0144] Ultimately, the sum of the user's (node's) electricity consumption and the line loss power consumption allocated to the user (node) can be multiplied by the calculated electricity carbon emission intensity to obtain the user's (node's) electricity carbon emission allocation.

[0145] In this embodiment, since a node may include multiple actual users, for any target user, the product of the target user's actual electricity consumption and the electricity carbon emission intensity of the node where the target user is located can be used as the target user's electricity carbon emission apportionment value.

[0146] This embodiment provides a carbon emission assessment method, which is based on node power parameters, node heat parameters, heating carbon emission intensity of various sources in the park, and power supply carbon emission intensity of various sources in the park. For any node, the heat carbon emission intensity of the node is calculated according to the heat loss of the branches between each node, the heat transfer amount of the branches between nodes, the actual heat consumption corresponding to the node, and the heating carbon emission intensity of various sources in the park; the electricity carbon emission intensity of the node is calculated based on the power load of each node, the active power flow between each node, and the power supply carbon emission intensity of various sources in the park, thereby effectively transmitting the carbon emission responsibility of electricity and thermal resources to specific nodes, helping users corresponding to the nodes understand the cleanliness of energy use, and providing basic signals for users' low-carbon response.

[0147] like Figure 2 As shown, in some embodiments, after step S130, the carbon emission assessment method may further include the following steps S140 to S160.

[0148] Step S140 , for any node, calculate the carbon dioxide emission equivalent of the 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.

[0149] In order to measure carbon emissions more comprehensively, the carbon dioxide emission equivalents corresponding to other greenhouse gases except carbon dioxide can be calculated by combining expression (22):

[0150] (twenty two)

[0151] in, is the corresponding carbon dioxide emission equivalent of the i-th category of non-carbon dioxide greenhouse gases; is the actual emission of the i-th type of non-CO2 greenhouse gas, in tons; is the global warming potential of greenhouse gas i, in tCO 2e / t.

[0152] Based on this, the carbon dioxide emission equivalent of the node (or user) can be obtained, which is expressed by expression (23):

[0153] (twenty three)

[0154] in, The carbon dioxide emissions equivalent generated by the node (or user), is the carbon emission apportionment value of electricity consumption, is the carbon emission apportionment value for heat use, It is the sum of the corresponding carbon dioxide emissions equivalents of n types of non-carbon dioxide greenhouse gases.

[0155] Step S150 , calculating the carbon emission intensity per unit output value in 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 in the specified period.

[0156] Assuming that the user is an enterprise, the added value of industrial production of the enterprise in a specified period can be counted, and the carbon emission intensity per unit output value can be calculated using expression (24):

[0157] (twenty four)

[0158] in, is the carbon emission intensity per unit of output value; It is the value added of industrial production of an enterprise in a specified period.

[0159] Step S160 , calculating the carbon footprint level of the product in the specified period according to the ratio of the carbon dioxide emission equivalent of the node to the product output of the node in the specified period.

[0160] The company's product output within a specified period can be counted, and combined with the corresponding total carbon dioxide emissions equivalent, the unit product carbon footprint level can be calculated using expression (25):

[0161] (25)

[0162] in, is the carbon footprint level per unit product; It is the product output of the user within a specified period.

[0163] Through the above steps S140 to S160, for enterprises, it is possible to help them establish carbon evaluation indicators, and use total carbon emissions as the basic data for the carbon evaluation indicators of park users; the corresponding carbon emission intensity can be used as the basis for responding to carbon emission intensity assessments; carbon footprints can provide a basic basis for the establishment of carbon labels and carbon footprints for corporate products, and the indicator system provides a basic indicator system for enterprises to respond to relevant assessments, formulate their own carbon emission targets, and conduct product import and export related assessments.

[0164] The present application provides a carbon emission assessment device, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions that can be executed 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 above-mentioned embodiment one.

[0165] Reference below Figure 3 , which shows a schematic diagram of the structure of a carbon emission assessment device suitable for implementing 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 Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), and in-vehicle terminals (e.g., in-vehicle navigation terminals), as well as fixed terminals such as digital TVs and desktop computers. Figure 3 The carbon emission assessment device shown is merely an example and should not limit the functions and scope of use of the embodiments of the present application.

[0166] like Figure 3 As shown, the carbon emission assessment device 100 may include a processing device 110 (e.g., a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes based on programs stored in a read-only memory (ROM) 120 or programs loaded from a storage device 130 into a random access memory (RAM) 140. RAM 140 also stores various programs and data required for the operation of the carbon emission assessment device. Processing device 110, ROM 120, and RAM 140 are interconnected via a bus 150. An input / output (I / O) interface 160 is also connected to the bus. Typically, the following systems may be connected to I / O interface 160: input devices 170, such as a touchscreen, touchpad, keyboard, mouse, image sensor, microphone, accelerometer, gyroscope, etc.; output devices 180, such as a liquid crystal display (LCD), speaker, vibrator, etc.; storage device 130, such as a magnetic tape or hard disk; and communication device 190. Communication device 190 can allow the carbon emission assessment device to communicate wirelessly or wired with other devices 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 of the systems shown. More or fewer systems may alternatively be implemented or have.

[0167] 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 comprising a computer program carried on a computer-readable medium, the computer program comprising program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network via a communication device, or installed from a storage device 130, or installed from a ROM 120. When the computer program is executed by the processing device 110, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0168] The carbon emission assessment device provided in this application, using the carbon emission assessment method described in the above-mentioned embodiment, can solve the technical problem of how to rationally divide carbon emission responsibilities within a park. Compared with the prior art, the carbon emission assessment device provided in this application has the same beneficial effects as the carbon emission assessment method described in the above-mentioned embodiment. The other technical features of this carbon emission assessment device are the same as those disclosed in the above-mentioned embodiment and are not further described here.

[0169] It should be understood that the various parts disclosed in this application can be implemented using hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0170] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

[0171] The present application provides a computer-readable storage medium having computer-readable program instructions (ie, a computer program) stored thereon, and the computer-readable program instructions are used to execute the carbon emission assessment method in the above embodiment.

[0172] The computer-readable storage medium provided in this 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 thereof. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. 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 may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

[0173] The computer-readable storage medium may be included in the carbon emission assessment device; or it may exist independently without being assembled into the carbon emission assessment device.

[0174] The computer-readable storage medium carries one or more programs that, when executed by the carbon emission assessment device, enable the carbon emission assessment device to write computer program code for performing the operations of the present application in one or more programming languages, or a combination thereof. These programming languages ​​include object-oriented programming languages ​​such as Java, Smalltalk, and C++, as well as conventional procedural programming languages ​​such as "C" or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a stand-alone 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 via any type of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0175] The flow charts and block diagrams in the accompanying drawings illustrate the possible architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present application. In this regard, each box in the flow chart or block diagram can represent a module, program segment or a part of code, and the module, program segment or a part of code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order than that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flow chart, and the combination of the boxes in the block diagram and / or flow chart can be implemented by a dedicated hardware-based system that performs the specified function or operation, or can be implemented by a combination of dedicated hardware and computer instructions.

[0176] The modules described in the embodiments of the present application may be implemented in software or hardware, wherein the name of a module does not necessarily limit the unit itself.

[0177] The computer-readable storage medium provided in this application stores computer-readable program instructions (i.e., a computer program) for executing the aforementioned carbon emission assessment method. This computer-readable storage medium can address the technical problem of rationally allocating carbon emission responsibilities within a park. Compared to existing technologies, the beneficial effects of the computer-readable storage medium provided in this application are similar to those of the carbon emission assessment method provided in the aforementioned embodiments and are not further elaborated here.

[0178] The present application also provides a computer program product, comprising a computer program, which implements the steps of the above-mentioned carbon emission assessment method when executed by a processor.

[0179] The computer program product provided in this application can solve the technical problem of how to reasonably divide the carbon emission responsibilities of a park. Compared with the existing technology, the beneficial effects of the computer program product provided in this application are the same as those of the carbon emission assessment method provided in the above embodiment, and will not be repeated here.

[0180] The above description is only part of the embodiments of the present application and does not limit the patent scope of the present application. All equivalent structural transformations made by using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect application in other related technical fields are 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 park's node power parameters and node heat parameters, as well as the carbon emission intensity of power supply and heat supply from various sources in the park; wherein the node power parameters include the power load of each node and the active power flow between each node; the node heat parameters include the actual heat consumption corresponding to each node, the heat loss of each inter-node branch, the heat transfer amount of each inter-node branch, and the specific enthalpy and mass of the heat medium at different locations in the park network topology; Constructing a campus network topology, wherein the network topology is a directed graph, each node in the network topology corresponds one-to-one to each node in the campus, and each edge in the network topology is established according to a connection relationship between nodes; 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. 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, calculate the heat loss of the inter-node branch based on 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 ratio of the total inflow carbon emissions of the node to the total inflow heat of the node is used 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 heat supply carbon emission intensity of the node connected to the unit and the first heat; For any node, calculate the total injected power of the node based on the active power injected by the generator set connected to the node and the total power flowing into the node from other connected nodes; Determining a power injection matrix for the node according to the total injected power of the node and the active power flow between the nodes; Calculating a backtracking matrix of the node according to the power injection matrix; Calculate the load proportion of the node according to the power load corresponding to the node and the total injected power; The carbon emission intensity of electricity consumption of the node is determined according to the carbon emission intensity of power supply from various sources in the park, the load proportion, and the backtracking matrix of the node.

2. The carbon emission assessment method according to claim 1, wherein: After calculating the carbon emission intensity of electricity consumption of any node based on the node's power load, the active power flow between nodes, and the carbon emission intensity of power supply from various sources in the park, the carbon emission assessment method further includes: For any node, calculate the CO2 emissions equivalent of the node based on the corresponding CO2 emissions equivalent of the non-CO2 greenhouse gases, the carbon emissions intensity of heat use, the carbon emissions intensity of electricity use, the node's electricity consumption, and the node's heat use; wherein the corresponding CO2 emissions equivalent of the non-CO2 greenhouse gases are calculated based on the global warming potential of each non-CO2 greenhouse gas and the corresponding actual emissions; Calculate the carbon emission intensity per unit of output value within a specified period based on the ratio of the carbon dioxide emission equivalent of the node to the industrial production added value of the node within a specified period; The carbon footprint level of the product in the specified period is calculated based on the ratio of the carbon dioxide emission equivalent of the node to the product output of the node in the specified period.

3. The carbon emission assessment method according to claim 1, wherein: Each edge in the network topology has a branch impedance; The obtaining of the node power parameters of the park includes: According to the power load of each node, 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; Calculating the voltage of each node step by step along the direction from the root node to the terminal node according to the known voltage of the node corresponding to the root node, the branch current, and the branch impedance; Active power flow conditions between the nodes are determined based on the branch currents and the voltages of the nodes.

4. The carbon emission assessment method according to claim 1, wherein: The carbon emission assessment method further includes: 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 used as the heat carbon emission apportionment value of the target user.

5. The carbon emission assessment method according to any one of claims 1 to 4, wherein: The power supply and heat supply sources 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 carbon emission intensity of the power supply and heat supply from various sources in the park, the carbon emission assessment method further includes: Calculate the carbon emission level of the captive power plant by using the carbon content, carbon oxidation rate and fuel consumption of various types of fuel used by the captive power plant; Calculating power supply carbon emissions and heating carbon emissions based on the heat supply ratio of the self-provided power plant and the carbon emission level of the self-provided power plant; The ratio of the power supply carbon emissions to the output power of the self-provided power plant is determined as the power supply carbon emission intensity of the self-provided power plant; The ratio of the heating carbon emissions to the output heat of the self-provided power plant is determined as the heating carbon emission intensity of the self-provided power plant.

6. A carbon emission assessment device, characterized in that: The carbon emission assessment device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the carbon emission assessment method according to any one of claims 1 to 5.

7. 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. When the computer program is executed by a processor, the steps of the carbon emission assessment method according to any one of claims 1 to 5 are implemented.

8. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is executed by a processor, the steps of the carbon emission assessment method according to any one of claims 1 to 5 are implemented.

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