A substation carbon emission monitoring method and system

Abstract

The application provides a substation carbon emission monitoring method and system, the method comprises the following steps: determining power generation connection relationship and substation branch connection relationship; acquiring real-time power flow power of a power system; calculating actual power generation and substation actual power flow power; determining line carbon source nodes of the power system and determining substation groups connected with the line carbon source nodes; constructing a distributed carbon emission decoupling calculation model; taking the actual power generation and the substation actual power flow power as inputs of the distributed carbon emission decoupling calculation model, calculating carbon emission data groups of the substation groups; acquiring substation carbon emission data to be monitored according to the substation carbon emission data groups, and completing carbon emission monitoring of the substation. The method combines real-time power flow power and distributed calculation, realizes carbon emission data calculation of the substation of the power system, greatly reduces the calculation complexity, meets efficient and real-time monitoring of the substation carbon emission, and improves the reliability of the monitoring.

Description

Technical Field

[0001] This invention relates to the field of carbon emission monitoring technology, and in particular to a method and system for monitoring carbon emissions from substations. Background Technology

[0002] Current methods for monitoring carbon emission factors mainly involve macroscopic carbon emission calculations based on regional divisions or carbon emission calculations based on carbon emission responsibility sharing. Existing research primarily considers centralized carbon emission monitoring or calculating power flow data for each power system node using recursive power flow methods to achieve the monitoring objective. However, this approach requires integrating the effects of various generating units and load changes on node carbon emissions.

[0003] For centralized carbon emission monitoring, macro-regional calculation methods and centralized power flow calculation methods are generally used. Macro-regional carbon emission calculation methods cannot consider carbon emissions from electricity transmission and consumption by electricity users, only calculating carbon emissions from electricity production. While centralized power flow calculation methods can consider the carbon emission sharing of electricity transmission participants, the calculations are complex, requiring consideration of various unit, line, and substation parameters, and power flow data is often obtained through precise simulations. Currently, optimization or prediction methods based on centralized power flow calculations are insufficient to meet the needs of real-time carbon emission calculations, mainly due to poor reliability and high computational complexity. First, it is difficult to collect power flow data synchronously in actual systems; if data from one node or line is not collected, the carbon emission calculation for the entire system will terminate. Second, centralized carbon emission calculations solve equations based on the power flow of each node, which is more complex than calculations based on individual nodes.

[0004] Therefore, due to various defects in the implementation of macro-regional division calculation methods and centralized power flow calculation methods, existing carbon emission monitoring methods generally suffer from low monitoring efficiency and poor reliability. Summary of the Invention

[0005] This invention aims to provide a method for monitoring carbon emissions from substations to solve the aforementioned technical problems. By constructing a distributed carbon emission decoupled calculation model to reduce computational complexity, it achieves efficient monitoring of carbon emissions from substations and improves the reliability of monitoring.

[0006] To address the aforementioned technical problems, this invention provides a method for monitoring carbon emissions from substations, comprising the following steps:

[0007] Obtain the topology information of the power system to determine the generation connection relationships and substation branch connection relationships;

[0008] Obtain the real-time power flow of the power system;

[0009] According to the power generation connection relationship, the substation branch connection relationship and the real-time power flow power, the actual power generation and the substation actual power flow power are calculated;

[0010] According to the real-time power flow data, the line carbon source node of the power system is determined, and the substation group connected with the line carbon source node is determined;

[0011] A distributed carbon emission decoupling calculation model is constructed, and the recursive calculation process of the traditional power flow equation set is converted into the information interaction calculation process between each substation with the line carbon source node as the core;

[0012] The actual power generation and the substation actual power flow power are taken as the input of the distributed carbon emission decoupling calculation model, and the carbon emission data group of the substation group is calculated;

[0013] According to the substation carbon emission data group, the substation carbon emission data to be monitored is obtained, and the carbon emission monitoring of the substation is completed.

[0014] The above scheme is based on the actual topological information of the power system and the real-time obtained real-time power flow power to calculate the actual power generation and the substation actual power flow power, so that the calculation of the carbon emission data is more reliable; by determining the line carbon source node of the power system, a distributed carbon emission decoupling calculation model for calculating the carbon emission data group of the substation group is constructed, the recursive method based on the traditional power flow equation set is converted into the information interaction calculation between each substation with the line carbon source node as the core, the calculation complexity is greatly reduced while calculating the carbon emission data of each node, so as to realize the calculation of the carbon emission data group of the substation group and complete the carbon emission monitoring of the substation.

[0015] The above scheme combines the real-time power flow power and the distributed calculation to realize the carbon emission data calculation of the substation of the power system, greatly reduces the calculation complexity, can meet the efficient and real-time monitoring of the substation carbon emission, avoids the deviation caused by data lag, and improves the reliability of the monitoring.

[0016] Further, the real-time power flow power of the power system to be monitored is obtained, specifically: the real-time power flow data of the power system to be monitored is obtained and corrected; the real-time power flow power is calculated according to the corrected real-time power flow data.

[0017] In the above scheme, the power flow data needs to be corrected in combination with the capacity constraint of the line, the superposition of the multi-loop line and the power flow topology, so that the power of the line meets the maximum capacity constraint of the line, and the power of the line represents the accumulation of the multi-loop line, which can greatly facilitate the subsequent calculation of the carbon emission data, improve the calculation and monitoring efficiency, and the power flow data fully considers the power combination of the multi-loop line, which is more in line with the actual demand of the power system.

[0018] In the above scheme, in addition to correcting the real-time power flow data, data that does not meet the constraints and topology requirements can also be removed to avoid interference or errors in the calculation results and improve the accuracy of monitoring.

[0019] Furthermore, the construction of the distributed carbon emission decoupled calculation model transforms the recursive calculation process of the traditional power flow equations into information interaction calculations between substations centered on the carbon source nodes of the transmission lines. Specifically:

[0020] Constructing a distributed carbon emission decoupled calculation model, specifically:

[0021]

[0022] In the formula: Indicates the first i Carbon emission data for each substation; n This indicates that the substation corresponds to... n Each carbon source node in the line is connected; Indicates the relationship with the first i The first substation connected to k The actual power generation of each carbon source node on the line; Indicates the first k Carbon emission factors of each carbon source node on the line; Indicates substation i With line carbon source node j The carbon emissions are known. The global carbon source result is known as the judgment matrix, and its initial value is 0. When the line carbon source node... j After the carbon emissions calculation is completed, update to =1; Indicates the carbon source node of the line j Flowing into the substation i The actual power flow of the substation; Indicates the corresponding number connected to this substation j Carbon emission data for each substation; Indicates substation i Inflow line carbon source node j Carbon emissions;

[0023] By using a distributed carbon emission decoupled calculation model, the recursive calculation process of the traditional power flow equations is transformed into an information interaction calculation process between substations with the carbon source nodes of the line as the core.

[0024] In the scheme, in the actual line application process of the distributed carbon emission decoupling calculation model, the line carbon source node of the power system determined according to the real-time power flow data is essentially calculated, and then the calculation model of the structure connected with the transformer substation is taken as the core of the line carbon source node. For the transformer substation connected with the line carbon source node, the transformer substation is taken as a node, if the carbon emission data of the line carbon source node is known, the calculation of the carbon emission data of the node can be realized, without using the recursive calculation process of the traditional power flow equation set, greatly reducing the complexity of the calculation and improving the calculation efficiency. The method essentially converts the multiple equations of the traditional power flow equation set into the carbon emission data between the nodes of the distributed carbon emission decoupling calculation model, and only the order of carbon emission calculation before and after the nodes is different, without mutual coupling between the carbon emission values.

[0025] In the scheme, the setting of the global carbon source result known judgment matrix can eliminate the nodes that have been calculated, avoid the repeated calculation and update of some calculation time, and make the final calculation result more accurate.

[0026] Further, for the carbon emission data calculation at a certain time, the actual power generation and the actual power flow power of the transformer substation are taken as the input of the distributed carbon emission decoupling calculation model, and the carbon emission data group of the transformer substation group is calculated, specifically:

[0027] The actual power generation and the actual power flow power of the transformer substation corresponding to the real-time power flow power at several time points before the time point are obtained;

[0028] The actual power generation and the actual power flow power corresponding to the several time points are sequentially taken as the input of the distributed carbon emission decoupling calculation model according to time, the carbon emission data of the transformer substation in the transformer substation group is calculated, and the carbon emission data group and the global carbon source result known judgment matrix of the transformer substation are updated until the carbon emission data at a certain time is completed, and the final updated carbon emission data group is obtained.

[0029] In the scheme, for a certain time, the carbon emission data of a single node is difficult to calculate, and since the power flow data is mostly recorded at a time, the carbon emission calculation results in the several time points before the time point can be taken as the carbon emission results at the current time, which overcomes the problem of single node calculation.

[0030] Further, for the carbon emission data calculation of a certain time period, the time period is divided into several time points, and the carbon emission data of each time point is calculated in time sequence to obtain the final updated carbon emission data group of each time point.

[0031] In the above scheme, for the carbon emission data calculation of a certain time period, each time point can be regarded as an independent calculation individual, each individual is only responsible for the carbon emission data calculation of its corresponding time point and outputs, and the obtained carbon emission data is transmitted to the non-computing node for supplementary carbon emission calculation.

[0032] The above scheme proposes a distributed and fast calculation real-time carbon emission calculation method for the problem of real-time carbon emission monitoring, saves the power flow calculation process of traditional carbon flow tracing by collecting real-time power flow and decoupling the system topology, and the carbon emission of each node is not centralized, and there is no coupling relationship between the data obtained, which is more in line with the communication situation of the actual power system.

[0033] The application also provides a substation carbon emission monitoring system for realizing a substation carbon emission monitoring method, which comprises a topological structure acquisition module, a power flow acquisition module, an input quantity calculation module, a substation group determination module, a calculation model construction module, a carbon emission data group calculation module and a carbon emission data acquisition module.

[0034] The topological structure acquisition module is used to acquire the topological information of the power system, and determine the power generation connection relationship and the substation branch connection relationship.

[0035] The power flow acquisition module is used to acquire the real-time power flow of the power system.

[0036] The input quantity calculation module is used to calculate the actual power generation and the actual power flow of the substation according to the power generation connection relationship, the substation branch connection relationship and the real-time power flow.

[0037] The substation group determination module is used to determine the line carbon source node of the power system according to the real-time power flow data, and determine the substation group connected with the line carbon source node.

[0038] The calculation model construction module is used to construct a distributed carbon emission decoupling calculation model, and convert the recursive calculation process of the traditional power flow equation group into an information interaction calculation process between each substation with the line carbon source node as the core.

[0039] The carbon emission data group calculation module is used to take the actual power generation and the actual power flow of the substation as the input of the distributed carbon emission decoupling calculation model, and calculate the carbon emission data group of the substation group.

[0040] The carbon emission data acquisition module is used to acquire the substation carbon emission data to be monitored according to the substation carbon emission data group, and complete the carbon emission monitoring of the substation.

[0041] Furthermore, the power flow acquisition module is used to acquire the real-time power flow of the power system, specifically by: acquiring the real-time power flow data of the power system to be monitored and correcting it; and calculating the real-time power flow based on the corrected real-time power flow data.

[0042] Furthermore, the computational model construction module is used to construct a distributed carbon emission decoupled computational model, transforming the recursive computation process of the traditional power flow equations into an information interaction computation process between substations centered on the carbon source nodes of the transmission lines. Specifically:

[0043] Constructing a distributed carbon emission decoupled calculation model, specifically:

[0044]

[0045] In the formula: Indicates the first i Carbon emission data for each substation; n This indicates that the substation corresponds to... n Each carbon source node in the line is connected; Indicates the relationship with the first i The first substation connected to k The actual power generation of each carbon source node on the line; Indicates the first k Carbon emission factors of each carbon source node on the line; Indicates substation i With line carbon source node j The carbon emissions are known. The global carbon source result is known as the judgment matrix, and its initial value is 0. When the line carbon source node... j After the carbon emissions calculation is completed, update to =1; Indicates the carbon source node of the line j Flowing into the substation i The actual power flow of the substation; Indicates the corresponding number connected to this substation j Carbon emission data for each substation; Indicates substation i Inflow line carbon source node j Carbon emissions;

[0046] By using a distributed carbon emission decoupled calculation model, the recursive calculation process of the traditional power flow equations is transformed into an information interaction calculation process between substations with the carbon source nodes of the line as the core.

[0047] Further, for the carbon emission data calculation at a certain time, the carbon emission data group calculation module is configured to take the actual power generation and the actual power flow of the transformer substation as inputs of a distributed carbon emission decoupling calculation model, calculate the carbon emission data group of the transformer substation group, and specifically:

[0048] The actual power generation and the actual power flow of the transformer substation at the corresponding time are calculated by acquiring the real-time power flow power at several time points before the time point.

[0049] The actual power generation and the actual power flow of the transformer substation at the corresponding time are calculated by acquiring the real-time power flow power at several time points before the time point.

[0050] Further, in the carbon emission data group calculation module, for the carbon emission data calculation of a certain time period, the time period is divided into several time points, and the carbon emission data of each time point is calculated in time sequence to obtain the final updated carbon emission data group of each time point. BRIEF DESCRIPTION OF DRAWINGS

[0051] Figure 1 A flowchart of a transformer substation carbon emission monitoring method is provided for an embodiment of the present application.

[0052] Figure 2 A module connection diagram of a transformer substation carbon emission monitoring system is provided for an embodiment of the present application. DETAILED DESCRIPTION

[0053] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0054] Please refer to Figure 1 The present embodiment provides a transformer substation carbon emission monitoring method, comprising the following steps:

[0055] S1: acquiring the topological information of the power system, determining the power generation connection relationship and the transformer substation branch connection relationship;

[0056] S2: acquiring the real-time power flow power of the power system;

[0057] S3: calculating the actual power generation and the actual power flow of the transformer substation according to the power generation connection relationship, the transformer substation branch connection relationship, and the real-time power flow power.

[0058] S4: determining a line carbon source node of the power system according to real-time power flow data, and determining a transformer substation group connected with the line carbon source node;

[0059] S5: constructing a distributed carbon emission decoupling calculation model, and converting a recursive calculation process of a traditional power flow equation group into an information interaction calculation process between each transformer substation with the line carbon source node as the core;

[0060] S6: taking the actual power generation and the actual power flow power of the transformer substation as inputs of the distributed carbon emission decoupling calculation model, and calculating a carbon emission data group of the transformer substation group;

[0061] S7: obtaining carbon emission data of the transformer substation to be monitored according to the carbon emission data group of the transformer substation, and completing carbon emission monitoring of the transformer substation.

[0062] The embodiment is based on actual topological information of the power system and real-time power flow power obtained in real time to calculate the actual power generation and the actual power flow power of the transformer substation, so that the calculation of the carbon emission data is more reliable. The distributed carbon emission decoupling calculation model for calculating the carbon emission data group of the transformer substation group is constructed by determining the line carbon source node of the power system, the recursive method based on the traditional power flow equation group is converted into the information interaction calculation between each transformer substation with the line carbon source node as the core, the calculation of the carbon emission data of each node is realized, the complexity of the calculation is greatly reduced, the carbon emission data group of the transformer substation group is calculated, and the carbon emission monitoring of the transformer substation is completed.

[0063] The embodiment combines the real-time power flow power and the distributed calculation to realize the calculation of the carbon emission data of the transformer substation of the power system, greatly reduces the calculation complexity, can meet the efficient and real-time monitoring of the carbon emission of the transformer substation, avoids the deviation caused by the data lag, and improves the reliability of the monitoring.

[0064] Further, the real-time power flow power of the power system to be monitored is obtained, specifically: real-time power flow data of the power system to be monitored is obtained and is corrected; and the real-time power flow power is calculated according to the corrected real-time power flow data.

[0065] In the embodiment, the power flow data needs to be corrected in combination with the capacity constraint of the line, the superposition of the multi-loop line, and the power flow topology, so that the power of the line meets the maximum capacity constraint of the line, the power of the line represents the accumulation of the multi-loop line, can greatly facilitate the subsequent calculation of the carbon emission data, improve the calculation and monitoring efficiency, and the power flow data fully considers the power combination of the multi-loop line, and is more in line with the actual demand of the power system.

[0066] In the embodiment, in addition to correcting the real-time power flow data, data that does not meet the constraints and topological requirements can be removed to avoid interference or errors on the calculation results and improve the accuracy of monitoring.

[0067] Further, the distributed carbon emission decoupling calculation model is constructed, and a recursive calculation process of a traditional power flow equation set is converted into information interaction calculation between each substation with a line carbon source node as a core, specifically as follows.

[0068] The distributed carbon emission decoupling calculation model is constructed, and specifically as follows.

[0069]

[0070] In the formula, P represents carbon emission data of the i th substation; P represents carbon emission data of the i th substation; i P represents carbon emission data of the i th substation; n P represents carbon emission data of the i th substation; n P represents carbon emission data of the i th substation; P represents actual power generation of the j th line carbon source node connected to the i th substation; i P represents carbon emission factor of the j th line carbon source node; k P represents carbon emission factor of the j th line carbon source node; P represents carbon emission factor of the j th line carbon source node; k P represents carbon emission factor of the j th line carbon source node; P represents carbon emission factor of the j th line carbon source node; i P represents carbon emission factor of the j th line carbon source node; j P represents carbon emission factor of the j th line carbon source node; P represents carbon emission factor of the j th line carbon source node; j P represents carbon emission factor of the j th line carbon source node; P represents carbon emission factor of the j th line carbon source node; P represents carbon emission factor of the j th line carbon source node; j P represents carbon emission factor of the j th line carbon source node; i P represents carbon emission factor of the j th line carbon source node; P represents carbon emission factor of the j th line carbon source node; j P represents carbon emission factor of the j th line carbon source node; P represents carbon emission factor of the j th line carbon source node; i P represents carbon emission factor of the j th line carbon source node; j P represents carbon emission factor of the j th line carbon source node; P represents carbon emission factor of the j th line carbon source node;

[0071] The distributed carbon emission decoupling calculation model is constructed, and a recursive calculation process of a traditional power flow equation set is converted into information interaction calculation between each substation with a line carbon source node as a core.

[0072] In the embodiment, in the actual line application process of the distributed carbon emission decoupling calculation model, the line carbon source node of the power system determined according to the real-time power flow data is calculated, and then the calculation model of the structure connected with the substation is calculated with the line carbon source node as the core. For the substation connected with the line carbon source node, the substation is taken as a node, if the carbon emission data of the line carbon source node is known, the calculation of the carbon emission data of the node can be realized, without using the recursive calculation process of the traditional power flow equation set, so that the complexity of the calculation is greatly reduced and the calculation efficiency is improved. The method is essentially to convert the multiple equations of the traditional power flow equation set into the carbon emission data between the nodes of the distributed carbon emission decoupling calculation model, and only the order of the carbon emission calculation before and after the nodes is different, without the mutual coupling between the carbon emission values.

[0073] In the embodiment, the setting of the global carbon source result known judgment matrix can eliminate the nodes that have been calculated, avoid the repeated calculation and update of the nodes at a certain calculation time, and make the final calculation result more accurate.

[0074] Further, for the carbon emission data calculation at a certain time, the actual power generation and the actual power flow power of the substation are taken as the input of the distributed carbon emission decoupling calculation model, the carbon emission data group of the substation group is calculated, and specifically:

[0075] The actual power generation and the actual power flow power of the substation corresponding to the real-time power flow power calculation at a plurality of time points before the time point are obtained;

[0076] The actual power generation and the actual power flow power corresponding to the plurality of time points are sequentially taken as the input of the distributed carbon emission decoupling calculation model according to time, the carbon emission data of the substation in the substation group is calculated, and the carbon emission data group and the global carbon source result known judgment matrix of the substation are updated until the carbon emission data at a certain time is completed, and the finally updated carbon emission data group is obtained.

[0077] In the embodiment, for a certain time, the carbon emission data of a single node is difficult to calculate, and since the power flow data is mostly recorded at a time, the carbon emission calculation results at a plurality of time points before the time point can be taken as the carbon emission results at the current time, so that the problem of single node calculation is overcome.

[0078] Further, for the carbon emission data calculation of a certain time period, the time period is divided into a plurality of time points, and the carbon emission data of each time point is calculated in time sequence to obtain the finally updated carbon emission data group of each time point.

[0079] In this embodiment, for carbon emission data calculation of a certain time period, each time point can be taken as an independent calculation individual, each individual is only responsible for carbon emission data calculation and output of its corresponding time point, and the obtained carbon emission data is transmitted to a non-computing node for supplementary carbon emission calculation.

[0080] The embodiment aims at the problem of real-time carbon emission monitoring, and proposes a distributed and fast calculation real-time carbon emission calculation method. By collecting real-time power flow and decoupling the system topology, the power flow calculation process of traditional carbon flow tracing is saved, and the carbon emission of each node is not centralized, and there is no coupling relationship between the data obtained, which is more in line with the communication situation of the actual power system.

[0081] In order to more clearly illustrate the technical implementation process of the present application, highlight its purpose and achieved technical effects, the embodiment specifically provides an actual application scene, wherein the parameters and expressions involved are only the application of routine expression by those skilled in the art, and cannot be interpreted as a limitation on the protection scope of the present application.

[0082] The embodiment provides a substation carbon emission monitoring method, specifically:

[0083] For obtaining the topology information of the power system, determining the power generation connection relationship and the substation branch connection relationship, first, the actual power system definition graph is obtained according to the actual power system G , which is expressed as a set , wherein is the node set of each connection line of the system, including the power plant set M and the substation set N ( m power plants and n substation nodes). E is the edge connecting each power system node, if the actual system has a line, the corresponding element is assigned a value of 1, otherwise it is assigned a value of 0, and has:

[0084]

[0085] wherein, represents the connection relationship between the i th node and the j th node. For the power generation connection relationship and the substation branch connection relationship, the system edge set can be determined, and the power generation connection matrix u 1 and the substation branch connection matrix u 2 are used to represent, specifically:

[0086]

[0087]

[0088] Then, initialize the emission data The carbon emission data of the power plant is determined according to its power generation type and carbon storage technology. For environmentally friendly power plants (hydroelectric, wind power and photovoltaic), their carbon emission data can be considered as 0 kg / kwh; for traditional thermal power plants, their carbon emission values are larger (such as gas plants can be assigned a value of 0.5 kg / kwh, oil plants can be assigned a value of 0.6 kg / kwh, and gas plants can be assigned a value of 1.05 kg / kwh, the specific value needs to be determined according to the carbon capture technology and the quality of coal); for power plants with carbon capture devices, their carbon emission values are lower than those of power plants without carbon capture devices. The initialized emission data can be used as the initial value for subsequent carbon emission data calculation.

[0089] S2: Obtain the real-time power flow of the power system, specifically:

[0090] The real-time power flow data of the power system is obtained through the intelligent terminal of the power system. In the case of a line with a set actual power system topology, the line has real-time power flow, which is calculated as follows:

[0091]

[0092] wherein, represents the power data of the first i line between the first j node and the second k node, represents the maximum power constraint of the first i node and the second j node, represents the number of lines connected between the first i node and the second j node, is the transmission power of the first i node and the second j node.

[0093] S3: Calculate the actual power generation and the actual power flow of the substation according to the power generation connection relationship, the substation branch connection relationship and the real-time power flow, specifically:

[0094] The actual power generation and the actual power flow of the substation can be determined according to the edge set E of the system, so the actual power generation and the actual power flow of the substation are calculated according to the power generation connection relationship, the substation branch connection relationship and the real-time power flow, and have:

[0095]

[0096]

[0097] S4: Based on real-time power flow data, determine the line carbon source nodes of the power system and identify the substation groups connected to the line carbon source nodes, specifically:

[0098] Based on real-time power flow data, the carbon source nodes of each line in the power system are determined. Therefore, for a node connected to a line carbon source node, if the carbon emission data of its line carbon source node are known, the carbon emission data of that node can be calculated without needing to solve... n The carbon emission coefficient can be solved by using a system of equations, thus enabling the construction of a distributed carbon emission decoupled calculation model for calculation.

[0099] S5: Construct a distributed carbon emission decoupled calculation model, transforming the recursive calculation process of the traditional power flow equations into an information interaction calculation process between substations centered on the carbon source nodes of the transmission lines. Specifically:

[0100] The recursive calculation process of the traditional current flow equations is transformed into the traditional carbon emission factor calculation process:

[0101]

[0102] Transformed into a distributed carbon emission decoupled calculation model:

[0103]

[0104] when i The node satisfies the carbon emission calculation. After the calculation is completed, its global carbon source result is known, and the judgment matrix is ​​updated to... Based on the distributed carbon emission decoupled calculation model, the calculation... n The system of equations is transformed into a computational decoupled network for carbon emission data. The only difference between nodes is the order in which carbon emission calculations are performed, without any coupling between the carbon emission values.

[0105] S6: Use the actual power generation and the actual power flow of the substation as inputs to the distributed carbon emission decoupled calculation model to calculate the carbon emission data set of the substation group;

[0106] S7: Obtain the carbon emission data of the substation to be monitored based on the substation carbon emission data set, and complete the carbon emission monitoring of the substation.

[0107] It should be noted that for the actual system, it is difficult to solve the carbon emission data of each single time node, since the power flow data is mostly recorded at a time, the carbon emission calculation result of several time before the time can be used as the carbon emission result of the current time. For the calculation of carbon emission data of a certain time period, each time can be regarded as an independent calculation individual, each individual is only responsible for the carbon emission data calculation of its corresponding time and outputs, and the obtained carbon emission data is transmitted to the uncalculated node for supplementary carbon emission calculation.

[0108] It should be further pointed out that when the distributed carbon emission decoupling calculation model is applied to the actual power system, since the substation node is n of the power system needs to be calculated independently n times to calculate the carbon emission data of the time, so for each time, the data of the previous t - p time (to ensure that no calculation is missed, the embodiment takes p = n -1) is accessed again, and the carbon emission calculation is performed on the site which is not 1. The specific execution steps are as follows:

[0109] Stage one: according to the power generation characteristics of the power plant, the initial carbon emission data is obtained, and the power system topology connection matrix , the power generation connection matrix u 1 and the substation branch connection matrix u 2 are obtained, and the calculation period is initialized T ;

[0110] Stage two: the intelligent terminal receives data from the connected substations and power plants, corrects the real-time power flow data according to the maximum line capacity, multi-loop line and specific power system topology, to correct the actual power generation and the actual power flow power of the substation .

[0111] Stage three: initialize as a full 0 vector, according to the nodes directly connected with the power station as the line carbon source node set of the current time calculation, independently calculate the carbon emission data of several time before the current time, i.e. t - p , and update the data, update the of the nodes that have been calculated to 1, and output the carbon emission data of the time;

[0112] Stage four: let t - p = t - p + 1, , that is, calculate t - p is one time before the time, repeat the calculation of stage three, until t- p = t This stage can be traversed. n Each substation is identified, and line carbon source nodes that meet the carbon emission calculation criteria are added to the line carbon source node set for calculation; if a certain node corresponds to If the value is 1, the node will be removed in subsequent calculations, and the final output will be the carbon emission data set of the substation group.

[0113] Phase 5: Regarding the calculation cycle T By executing phases one through four at each moment, the computation cycle can be obtained. T The carbon emission data set of the substation group at each moment.

[0114] In this embodiment, for the calculation cycle T The carbon emission data calculation treats each moment as an independent calculation unit. Each unit is only responsible for calculating and outputting the carbon emission data for its corresponding moment, and transmits the obtained carbon emission data to the uncalculated nodes for supplementary carbon emission calculation.

[0115] The substation carbon emission monitoring method provided in this embodiment can quickly obtain carbon emission data of each substation node in the power system, improve the monitoring of substation carbon emission data, facilitate users to clarify the specific changes in carbon emissions of the power supplier, effectively respond to the call for low-carbon emission reduction, formulate reasonable electricity consumption plans based on monitoring results, and comprehensively score power system nodes, which has great application value in actual monitoring.

[0116] Please see Figure 2 This embodiment provides a substation carbon emission monitoring system for implementing a substation carbon emission monitoring method. The system includes a topology acquisition module, a power flow acquisition module, an input calculation module, a substation group determination module, a calculation model construction module, a carbon emission data group calculation module, and a carbon emission data acquisition module. Wherein:

[0117] The topology acquisition module is used to acquire the topology information of the power system and determine the power generation connection relationship and the substation branch connection relationship.

[0118] The power flow acquisition module is used to acquire the real-time power flow of the power system.

[0119] The input calculation module is used to calculate the actual power generation and the actual power flow of the substation based on the power generation connection relationship, the substation branch connection relationship and the real-time power flow.

[0120] The substation group determination module is used to determine the line carbon source nodes of the power system based on real-time power flow data, and to determine the substation group connected to the line carbon source nodes.

[0121] The computational model building module is used to construct a distributed carbon emission decoupled computational model, which transforms the recursive computation process of the traditional power flow equations into an information interaction computation process between substations with the carbon source nodes of the line as the core.

[0122] The carbon emission data set calculation module is used to take the actual power generation and the actual power flow of the substation as inputs to the distributed carbon emission decoupled calculation model to calculate the carbon emission data set of the substation group.

[0123] The carbon emission data acquisition module is used to acquire the carbon emission data of the substation to be monitored based on the substation carbon emission data set, and to complete the carbon emission monitoring of the substation.

[0124] Furthermore, the power flow acquisition module is used to acquire the real-time power flow of the power system, specifically by: acquiring the real-time power flow data of the power system to be monitored and correcting it; and calculating the real-time power flow based on the corrected real-time power flow data.

[0125] Furthermore, the computational model construction module is used to construct a distributed carbon emission decoupled computational model, transforming the recursive computation process of the traditional power flow equations into an information interaction computation process between substations centered on the carbon source nodes of the transmission lines. Specifically:

[0126] Constructing a distributed carbon emission decoupled calculation model, specifically:

[0127]

[0128] In the formula: Indicates the first i Carbon emission data for each substation; n This indicates that the substation corresponds to... n Each carbon source node in the line is connected; Indicates the relationship with the first i The first substation connected to k The actual power generation of each carbon source node on the line; Indicates the first k Carbon emission factors of each carbon source node on the line; Indicates substation i With line carbon source node j The carbon emissions are known. The global carbon source result is known as the judgment matrix, and its initial value is 0. When the line carbon source node... j After the carbon emissions calculation is completed, update to =1; Indicates the carbon source node of the line j Flowing into the substation i The actual power flow of the substation; Indicates the corresponding number connected to this substation jcarbon emission data of a power substation; representing a power substation i carbon source node of an inflow line j carbon emission amount of a power substation;

[0129] By means of the distributed carbon emission decoupling calculation model, the recursive calculation process of the traditional power flow equation set is converted into the information interaction calculation process between the power substations with the line carbon source node as the core.

[0130] Further, for the carbon emission data calculation at a certain moment, the carbon emission data group calculation module is configured to take the actual power generation and the actual power flow power of the power substation as the input of the distributed carbon emission decoupling calculation model, and calculate the carbon emission data group of the power substation group, specifically:

[0131] The actual power generation and the actual power flow power at the corresponding moment are calculated by means of the real-time power flow power calculation at a plurality of moments before the moment;

[0132] The actual power generation and the actual power flow power corresponding to the plurality of moments are sequentially taken as the input of the distributed carbon emission decoupling calculation model according to time, the carbon emission data of the power substation in the power substation group is calculated, and the carbon emission data group and the global carbon source result known judgment matrix are updated until the carbon emission data at a certain moment is completed, and the finally updated carbon emission data group is obtained.

[0133] Further, in the carbon emission data group calculation module, for the carbon emission data calculation of a certain time period, the time period is divided into a plurality of moments, and the carbon emission data of each moment is sequentially calculated according to time, and the finally updated carbon emission data group of each moment is obtained.

[0134] The power substation carbon emission monitoring system provided in the embodiment can quickly obtain the carbon emission data of each power substation node of the power system, improve the monitoring of the carbon emission data of the power substation, facilitate the user to clarify the specific change process of the carbon emission of the power supply party, well respond to the call of low-carbon emission reduction, can make a reasonable electricity plan according to the monitoring result, and comprehensively score the power system node, and has good application value in actual monitoring.

[0135] The above is the preferred embodiment of the present application. It should be noted that for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which are also considered within the scope of protection of the present application.

Claims

1. A method for monitoring carbon emissions from a substation, characterized in that, Includes the following steps: Obtain the topology information of the power system to determine the generation connection relationships and substation branch connection relationships; Obtain the real-time power flow of the power system; Calculate the actual power generation and the actual power flow of the substation based on the power generation connection relationship, the substation branch connection relationship and the real-time power flow. Based on real-time power flow data, determine the line carbon source nodes of the power system and identify the substation groups connected to the line carbon source nodes. A distributed carbon emission decoupled calculation model is constructed, which transforms the recursive calculation process of the traditional power flow equations into an information interaction calculation process between substations with the carbon source nodes of the line as the core. The specific steps for constructing the distributed carbon emission decoupled calculation model are as follows: In the formula: Indicates the first i Carbon emission data for each substation; n This indicates that the substation corresponds to... n Each carbon source node in the line is connected; Indicates the relationship with the first i The first substation connected to k The actual power generation of each carbon source node on the line; Indicates the first k Carbon emission factors of each carbon source node on the line; Indicates substation i With line carbon source node j The carbon emissions are known. The global carbon source result is known as the judgment matrix, and its initial value is 0. When the line carbon source node... j After the carbon emissions calculation is completed, update to =1; Indicates the carbon source node of the line j Flowing into the substation i The actual power flow of the substation; Indicates the corresponding number connected to this substation j Carbon emission data for each substation; Indicates substation i Inflow line carbon source node j Carbon emissions; Using actual power generation and actual power flow of the substation as inputs to the distributed carbon emission decoupled calculation model, the carbon emission data set of the substation group is calculated. Specifically, for the carbon emission data calculation at a certain moment, the process of using actual power generation and actual power flow of the substation as inputs to the distributed carbon emission decoupled calculation model to calculate the carbon emission data set of the substation group is as follows: Obtain the real-time power flow of several moments prior to the current moment to calculate the actual power generation and the actual power flow of the substation at the corresponding moment. The actual power generation and actual power flow of the substation at several times are used as inputs to the distributed carbon emission decoupled calculation model in chronological order. The carbon emission data of the substation in the substation group are calculated and the known judgment matrix of the carbon emission data group and the global carbon source result of the substation is updated until the carbon emission data at a certain time is completed, and the final updated carbon emission data group is obtained. The carbon emission data of the substation to be monitored is obtained from the substation carbon emission data set, and the carbon emission monitoring of the substation is completed.

2. The method for monitoring carbon emissions from a substation according to claim 1, characterized in that, The acquisition of the real-time power flow of the power system specifically involves: Acquire and correct real-time power flow data of the power system to be monitored; Real-time power flow is calculated based on the corrected real-time power flow data.

3. The method for monitoring carbon emissions from a substation according to claim 1, characterized in that, For carbon emission data calculation within a certain time period, the time period is divided into several moments, and the carbon emission data for each moment is calculated sequentially according to time, resulting in the final updated carbon emission data set for each moment.

4. A substation carbon emission monitoring system, characterized in that, It includes a topology acquisition module, a power flow acquisition module, an input calculation module, a substation group determination module, a calculation model construction module, a carbon emission data set calculation module, and a carbon emission data acquisition module; among which: The topology acquisition module is used to acquire the topology information of the power system and determine the power generation connection relationship and the substation branch connection relationship. The power flow acquisition module is used to acquire the real-time power flow of the power system. The input calculation module is used to calculate the actual power generation and the actual power flow of the substation based on the power generation connection relationship, the substation branch connection relationship and the real-time power flow. The substation group determination module is used to determine the line carbon source nodes of the power system based on real-time power flow data, and to determine the substation group connected to the line carbon source nodes. The computational model building module is used to construct a distributed carbon emission decoupled computational model, which transforms the recursive computation process of the traditional power flow equations into an information interaction computation process between substations with the carbon source nodes of the line as the core. The specific steps for constructing the distributed carbon emission decoupled calculation model are as follows: In the formula: Indicates the first i Carbon emission data for each substation; n This indicates that the substation corresponds to... n Each carbon source node in the line is connected; Indicates the relationship with the first i The first substation connected to k The actual power generation of each carbon source node on the line; Indicates the first k Carbon emission factors of each carbon source node on the line; Indicates substation i With line carbon source node j The carbon emissions are known. The global carbon source result is known as the judgment matrix, and its initial value is 0. When the line carbon source node... j After the carbon emissions calculation is completed, update to =1; Indicates the carbon source node of the line j Flowing into the substation i The actual power flow of the substation; Indicates the corresponding number connected to this substation j Carbon emission data for each substation; Indicates substation i Inflow line carbon source node j Carbon emissions; The carbon emission data set calculation module is used to calculate the carbon emission data set of the substation group by taking the actual power generation and the actual power flow of the substation as inputs to the distributed carbon emission decoupled calculation model. Specifically, for the carbon emission data calculation at a certain moment, taking the actual power generation and the actual power flow of the substation as inputs to the distributed carbon emission decoupled calculation model to calculate the carbon emission data set of the substation group involves: Obtain the real-time power flow of several moments prior to the current moment to calculate the actual power generation and the actual power flow of the substation at the corresponding moment. The actual power generation and actual power flow of the substation at several times are used as inputs to the distributed carbon emission decoupled calculation model in chronological order. The carbon emission data of the substation in the substation group are calculated and the known judgment matrix of the carbon emission data group and the global carbon source result of the substation is updated until the carbon emission data at a certain time is completed, and the final updated carbon emission data group is obtained. The carbon emission data acquisition module is used to acquire the carbon emission data of the substation to be monitored based on the substation carbon emission data set, and to complete the carbon emission monitoring of the substation.

5. A substation carbon emission monitoring system according to claim 4, characterized in that, The power flow acquisition module is used to acquire the real-time power flow of the power system, specifically: Acquire and correct real-time power flow data of the power system to be monitored; Real-time power flow is calculated based on the corrected real-time power flow data.

6. A substation carbon emission monitoring system according to claim 4, characterized in that, In the carbon emission data set calculation module, for carbon emission data calculation within a certain time period, the time period is divided into several moments, and the carbon emission data of each moment is calculated sequentially according to time to obtain the final updated carbon emission data set for each moment.

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