CN115809282A - Transformer substation carbon emission monitoring method and system - Google Patents
Transformer substation carbon emission monitoring method and system Download PDFInfo
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Abstract
The invention provides a method and a system for monitoring carbon emission of a transformer substation, wherein the method comprises the following steps: determining a power generation connection relation and a substation branch connection relation; acquiring real-time tidal power of a power system; calculating actual generated energy and actual tidal current power of the transformer substation; determining a line carbon source node of the power system and determining a transformer station group connected with the line carbon source node; constructing a distributed carbon emission decoupling calculation model; calculating a carbon emission data set of the transformer substation by taking the actual generated energy and the actual tidal current power of the transformer substation as the input of a distributed carbon emission decoupling calculation model; and acquiring the carbon emission data of the transformer substation to be monitored according to the carbon emission data group of the transformer substation, and finishing the carbon emission monitoring of the transformer substation. The method combines the real-time tidal current power and the distributed calculation, realizes the calculation of the carbon emission data of the transformer substation of the power system, greatly reduces the calculation complexity, meets the requirements of efficient and real-time monitoring of the carbon emission of the transformer substation, and improves the reliability of monitoring.
Description
Technical Field
The invention relates to the technical field of carbon emission monitoring, in particular to a method and a system for monitoring carbon emission of a transformer substation.
Background
The current method for monitoring the carbon emission factor is mainly realized by performing macroscopic carbon emission calculation according to regional division or carbon emission calculation according to carbon emission responsibility sharing. In the existing research, the purpose of monitoring is mainly considered by centralized carbon emission monitoring or calculating the load flow data of each power system node in a recursion load flow mode, but the mode needs to integrate multiple generator sets and take the influence of multiple load changes on the carbon emission of the nodes into consideration.
Aiming at a centralized carbon emission monitoring mode, a macro area division calculation method and a centralized power flow calculation method are generally adopted for realization. The macroscopic region carbon emission calculation method cannot consider the carbon emission consumed by power transmission and power consumers, and only calculates the carbon emission generated by power production; although the centralized load flow calculation method can consider the carbon emission sharing of the power transmission participants, the calculation is complex, various unit, line and substation parameters need to be considered, and the load flow data calculation is obtained through accurate simulation calculation. At present, an optimization or prediction method based on centralized power flow calculation is difficult to meet the real-time carbon emission calculation requirement, and mainly has poor reliability and high calculation complexity. Firstly, tidal current data of an actual system is difficult to acquire synchronously, and if data of one node or line cannot be acquired, carbon emission calculation of the whole system is stopped; secondly, the centralized carbon emission calculation is based on the power flow of each node to solve the equation, and the calculation complexity is higher compared with the carbon emission calculation based on each node.
Therefore, the problems of low monitoring efficiency and poor reliability commonly exist in the existing carbon emission monitoring mode due to various defects stored in the macro area division computing method and the centralized power flow computing method in the implementation process.
Disclosure of Invention
The invention aims to provide a transformer substation carbon emission monitoring method, which aims to solve the technical problems and reduce the complexity of calculation by constructing a distributed carbon emission decoupling calculation model, thereby realizing the efficient monitoring of the carbon emission of the transformer substation and improving the reliability of the monitoring.
In order to solve the technical problem, the invention provides a transformer substation carbon emission monitoring method, which comprises the following steps:
acquiring topological information of a power system, and determining a power generation connection relation and a substation branch connection relation;
acquiring real-time tidal power of a power system;
calculating actual generating capacity and actual tidal current power of the transformer substation according to the power generation connection relation, the transformer substation branch connection relation and the real-time tidal current power;
determining a line carbon source node of the power system according to the real-time power flow data, and determining a transformer station group connected with the line carbon source node;
constructing a distributed carbon emission decoupling calculation model, and converting a recursion calculation process of a traditional power flow equation set into an information interaction calculation process among all transformer substations taking a line carbon source node as a core;
calculating a carbon emission data set of the transformer substation group by taking the actual generated energy and the actual tidal current power of the transformer substation as the input of a distributed carbon emission decoupling calculation model;
and acquiring the carbon emission data of the transformer substation to be monitored according to the carbon emission data group of the transformer substation, and finishing the carbon emission monitoring of the transformer substation.
According to the scheme, the calculation of the actual generating capacity and the actual tidal current power of the transformer substation is realized on the basis of the actual topological information of the power system and the real-time tidal current power acquired in real time, so that the calculation of the carbon emission data is more reliable; a distributed carbon emission decoupling calculation model for calculating a carbon emission data set of a transformer substation set is established by determining line carbon source nodes of an electric power system, a recursion mode based on a traditional power flow equation set is converted into information interaction calculation between the transformer substations taking the line carbon source nodes as cores, the calculation complexity of carbon emission data of each node is greatly reduced while the calculation of the carbon emission data set of the transformer substation is realized, and the monitoring of the carbon emission of the transformer substations is completed.
According to the scheme, the real-time tidal current power and the distributed calculation are combined, the carbon emission data of the transformer substation of the power system are calculated, the calculation complexity is greatly reduced, the efficient and real-time monitoring of the carbon emission of the transformer substation can be met, the deviation caused by data lag is avoided, and the monitoring reliability is improved.
Further, the obtaining of the real-time tidal power of the power system to be monitored specifically includes: acquiring real-time power flow data of a power system to be monitored and correcting the real-time power flow data; and calculating the real-time power flow according to the corrected real-time power flow data.
In the scheme, the power flow data is required to be corrected by combining the capacity constraint of the line, the superposition of multiple loops of lines 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 multiple loops of lines, the subsequent calculation of the carbon emission data can be greatly facilitated, the calculation monitoring efficiency is improved, the power combination of the multiple loops of lines is fully considered by the power flow data, and the requirement of an actual power system is better met.
According to the scheme, the real-time power flow data is corrected, the data which do not meet the requirements of constraint and topology can be removed, interference or errors on the calculation result are avoided, and the monitoring accuracy is improved.
Further, the building of the distributed carbon emission decoupling calculation model converts a recursive calculation process of a traditional power flow equation set into information interaction calculation among the transformer substations with a line carbon source node as a core, and specifically includes:
constructing a distributed carbon emission decoupling calculation model, which specifically comprises the following steps:
in the formula: c. C i Representing carbon emission data of an ith substation; n represents that the transformer substation is correspondingly connected with n line carbon source nodes; u. of 11 (i, k) represents the actual power generation amount of the kth line carbon source node connected with the ith substation;
representing a carbon emission factor of a kth line carbon source node; u. of 3 (j)· 22 (j,i)>0 denotes that the carbon emission of substation i and line carbon source node j is known, u 3 (j) The result of the global carbon source is known, the initial value of the judgment matrix is 0, and when the carbon emission of the line carbon source node j is calculated, the judgment matrix is updated to be u 3 (j)＝1；u 22 (j, i) the actual tidal current power of the transformer substation, flowing into the transformer substation i, of the line carbon source node j is represented; c. C j Representing carbon emission data of a corresponding jth substation connected to the substation;
representing the carbon emission of the substation i flowing into the line carbon source node j;
through a distributed carbon emission decoupling calculation model, a recursion calculation process of a traditional power flow equation set is converted into an information interaction calculation process among all transformer substations taking a line carbon source node as a core.
In the scheme, the distributed carbon emission decoupling calculation model is a calculation model of a structure which is formed by connecting line carbon source nodes of a power system determined according to real-time load flow data, and then the line carbon source nodes serve as cores and are connected by a transformer substation in the actual line application process. For the transformer substation connected with the line carbon source node, the node is used as the 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, the recursive calculation process of the traditional power flow equation set is not required to be utilized, the calculation complexity is greatly reduced, and the calculation efficiency is improved. The method is characterized in that a plurality of equations calculated by a traditional power flow equation set are converted into carbon emission data among nodes of a calculation distributed carbon emission decoupling calculation model, the nodes are only divided by the front and back sequence of carbon emission calculation, and no carbon emission numerical value is mutually coupled.
In the scheme, due to the arrangement of the global carbon source result known judgment matrix, the calculated nodes can be eliminated, the situation that repeated calculation and updating exist in a certain calculation moment is avoided, and the final calculation result is more accurate.
Further, for the calculation of carbon emission data at a certain moment, the actual power generation amount and the actual tidal current power of the transformer substation are used as the input of the distributed carbon emission decoupling calculation model to calculate the carbon emission data set of the transformer substation, specifically:
acquiring real-time tidal current power of a plurality of moments before the moment, and calculating actual generated energy and actual tidal current power of a transformer substation at corresponding moments;
and sequentially using the actual generated energy and the actual tidal current power of the transformer substation corresponding to a plurality of moments as the input of the distributed carbon emission decoupling calculation model according to time, calculating the carbon emission data of the transformer substation in the transformer substation group, and updating the carbon emission data group and the global carbon source result known judgment matrix of the transformer substation until the carbon emission data at a certain moment is completed to obtain a finally updated carbon emission data group.
In the scheme, the carbon emission data of a single node at a certain moment is difficult to calculate, and because most of the load flow data is recorded at the moment, the carbon emission calculation results within a plurality of moments preset before the moment can be used as the carbon emission result at the current moment, so that the problem that the carbon emission of the single node is difficult to calculate is solved.
Further, the time period is divided into a plurality of moments according to the carbon emission data calculation of the certain time period, and the carbon emission data of each moment are calculated sequentially according to time to obtain a finally updated carbon emission data set of each moment.
In the above scheme, for the carbon emission data calculation in a certain time period, each time can be used as an independent calculation individual, each individual is only responsible for the carbon emission data calculation of the corresponding time and outputs the carbon emission data, and the obtained carbon emission data is transmitted to the non-calculation node for the carbon emission compensation calculation.
The scheme provides a distributed real-time carbon emission calculation method capable of calculating quickly for the problem of real-time carbon emission monitoring, the traditional carbon flow tracing power flow calculation process is saved by collecting real-time power flow and decoupling system topology, carbon emission of each node is not centralized, and the obtained data have no coupling relation, so that the method is more suitable for the communication condition of an actual power system.
The invention also provides a transformer substation carbon emission monitoring system for realizing the transformer substation carbon emission monitoring method, which comprises a topological structure acquisition module, a tidal current power acquisition module, an input quantity calculation module, a transformer substation group determination module, a calculation model construction module, a carbon emission data group calculation module and a carbon emission data acquisition module; wherein:
the topological structure acquisition module is used for acquiring topological information of the power system and determining a power generation connection relation and a substation branch connection relation;
the power flow power acquisition module is used for acquiring real-time power flow power of the power system;
the input quantity calculation module is used for calculating actual generating capacity and actual tidal current power of the transformer substation according to the power generation connection relation, the transformer substation branch connection relation and the real-time tidal current power;
the transformer station group determining module is used for determining a line carbon source node of the power system according to the real-time power flow data and determining a transformer station group connected with the line carbon source node;
the calculation model construction module is used for constructing a distributed carbon emission decoupling calculation model and converting a recursive calculation process of a traditional power flow equation set into an information interaction calculation process among all transformer substations taking a line carbon source node as a core;
the carbon emission data set calculation module is used for taking the actual generated energy and the actual tidal current power of the transformer substation as the input of the distributed carbon emission decoupling calculation model and calculating the carbon emission data set of the transformer substation;
and the carbon emission data acquisition module is used for acquiring the carbon emission data of the transformer substation to be monitored according to the carbon emission data set of the transformer substation to complete the carbon emission monitoring of the transformer substation.
Further, the tidal current power obtaining module is configured to obtain real-time tidal current power of the power system, and specifically includes: acquiring real-time power flow data of a power system to be monitored and correcting the real-time power flow data; and calculating real-time power flow according to the corrected real-time power flow data.
Further, the calculation model building module is used for building a distributed carbon emission decoupling calculation model, and converting a recursive calculation process of a traditional power flow equation set into an information interaction calculation process among all transformer substations taking a line carbon source node as a core, and specifically comprises the following steps:
constructing a distributed carbon emission decoupling calculation model, which specifically comprises the following steps:
in the formula: c. C i Representing carbon emission data of an ith substation; n represents that the transformer substation is correspondingly connected with n line carbon source nodes; u. u 11 (i, k) represents the actual power generation amount of the kth line carbon source node connected with the ith substation;
representing a carbon emission factor of a kth line carbon source node; u. of 3 (j)· 22 (j,i)>0 watchIndicating that the carbon emission of the substation i and the line carbon source node j is known, u 3 (j) The result of the global carbon source is known, the initial value of the judgment matrix is 0, and when the carbon emission of the line carbon source node j is calculated, the judgment matrix is updated to be u 3 (j)＝1；u 22 (j, i) the actual tidal current power of the line carbon source node j flowing into the transformer substation i is represented; c. C j Representing carbon emission data of a corresponding jth substation connected to the substation;
representing the carbon emission of the substation i flowing into the line carbon source node j;
through a distributed carbon emission decoupling calculation model, a recursion calculation process of a traditional power flow equation set is converted into an information interaction calculation process among all transformer substations taking a line carbon source node as a core.
Further, for the carbon emission data calculation at a certain time, the carbon emission data group calculation module is configured to calculate the carbon emission data group of the substation group by using the actual power generation amount and the actual tidal current power of the substation as the input of the distributed carbon emission decoupling calculation model, and specifically:
acquiring real-time tidal current power of a plurality of moments before the moment, and calculating actual generated energy and actual tidal current power of a transformer substation at the corresponding moment;
and sequentially using the actual generated energy and the actual tidal current power of the transformer substation corresponding to a plurality of moments as the input of the distributed carbon emission decoupling calculation model according to time, calculating the carbon emission data of the transformer substation in the transformer substation group, and updating the carbon emission data group and the global carbon source result known judgment matrix of the transformer substation until the carbon emission data at a certain moment is completed to obtain a finally updated carbon emission data group.
Further, in the carbon emission data group calculation module, the time period is divided into a plurality of moments according to the carbon emission data calculation of the time period, and the carbon emission data of each moment is calculated according to time sequence, so that the carbon emission data group finally updated at each moment is obtained.
Drawings
Fig. 1 is a schematic flow chart of a method for monitoring carbon emission of a substation according to an embodiment of the present invention;
fig. 2 is a schematic connection diagram of a substation carbon emission monitoring system module according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
Referring to fig. 1, the present embodiment provides a method for monitoring carbon emission of a substation, including the following steps:
s1: acquiring topological information of a power system, and determining a power generation connection relation and a substation branch connection relation;
s2: acquiring real-time tidal power of a power system;
s3: calculating actual generating capacity and actual tidal current power of the transformer substation according to the power generation connection relation, the transformer substation branch connection relation and the real-time tidal current power;
s4: determining a line carbon source node of the power system according to the real-time power flow data, and determining a transformer station group connected with the line carbon source node;
s5: constructing a distributed carbon emission decoupling calculation model, and converting a recursion calculation process of a traditional power flow equation set into an information interaction calculation process among all transformer substations taking a line carbon source node as a core;
s6: calculating a carbon emission data set of the transformer substation group by taking the actual generated energy and the actual tidal current power of the transformer substation as the input of a distributed carbon emission decoupling calculation model;
s7: and acquiring the carbon emission data of the transformer substation to be monitored according to the carbon emission data group of the transformer substation, and completing the carbon emission monitoring of the transformer substation.
The method and the device realize the calculation of the actual power generation and the actual tidal current power of the transformer substation based on the actual topological information of the power system and the real-time tidal current power acquired in real time, so that the calculation of the carbon emission data is more reliable; a distributed carbon emission decoupling calculation model for calculating a carbon emission data set of a transformer substation is constructed by determining line carbon source nodes of an electric power system, a recursion mode based on a traditional power flow equation set is converted into information interaction calculation among the transformer substations taking the line carbon source nodes as cores, calculation complexity of carbon emission data of each node is greatly reduced while calculation of the carbon emission data set of the transformer substation is achieved, and monitoring of carbon emission of the transformer substation is completed.
The embodiment combines the real-time tidal current power and the distributed calculation, realizes the carbon emission data calculation of the transformer substation of the power system, greatly reduces the calculation complexity, can meet the requirement of efficient and real-time monitoring of the carbon emission of the transformer substation, avoids the deviation caused by data lag, and improves the monitoring reliability.
Further, the obtaining of the real-time tidal power of the power system to be monitored specifically includes: acquiring real-time power flow data of a power system to be monitored and correcting the real-time power flow data; and calculating the real-time power flow according to the corrected real-time power flow data.
In the embodiment, the power flow data needs to be corrected by combining the capacity constraint of the line, the superposition of multiple loops of lines 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 multiple loops of lines, the subsequent calculation of the carbon emission data can be greatly facilitated, the calculation monitoring efficiency is improved, the power combination of the multiple loops of lines is fully considered by the power flow data, and the demand of an actual power system is better met.
In the embodiment, besides the real-time power flow data is corrected, data which do not meet the requirements of constraint and topology can be removed, so that interference or errors on the calculation result are avoided, and the monitoring accuracy is improved.
Further, the method for constructing the distributed carbon emission decoupling calculation model converts a recursive calculation process of a traditional power flow equation set into information interaction calculation among the transformer substations taking the line carbon source node as a core, and specifically comprises the following steps of:
constructing a distributed carbon emission decoupling calculation model, which specifically comprises the following steps:
in the formula: c. C i Representing carbon emission data of an ith substation; n represents that the transformer substation is correspondingly connected with n line carbon source nodes; u. u 11 (i, k) represents the actual power generation amount of the kth line carbon source node connected with the ith substation;
representing a carbon emission factor of a kth line carbon source node; u. of 3 (j)· 22 (j,i)>0 denotes that the carbon emission of substation i and line carbon source node j is known, u 3 (j) The initial value of the judgment matrix for the global carbon source result is 0, and the judgment matrix is updated to u after the carbon emission of the line carbon source node j is calculated 3 (j)＝1；u 22 (j, i) the actual tidal current power of the line carbon source node j flowing into the transformer substation i is represented; c. C j Representing carbon emission data of a corresponding jth substation connected to the substation;
representing the carbon emission of the substation i flowing into the line carbon source node j;
through a distributed carbon emission decoupling calculation model, a recursion calculation process of a traditional power flow equation set is converted into an information interaction calculation process among all transformer substations taking a line carbon source node as a core.
In this embodiment, in the actual line application process, the distributed carbon emission decoupling calculation model is a calculation model of a structure in which line carbon source nodes of the power system determined according to the real-time load flow data are connected by the substation with the line carbon source nodes as a core. For the transformer substation connected with the line carbon source node, the node is used as the 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, the recursive calculation process of the traditional power flow equation set is not required to be utilized, the calculation complexity is greatly reduced, and the calculation efficiency is improved. The method is characterized in that a plurality of equations calculated by a traditional power flow equation set are converted into carbon emission data among nodes of a calculation distributed carbon emission decoupling calculation model, the nodes are only divided by the front and back sequence of carbon emission calculation, and no carbon emission numerical value is mutually coupled.
In this embodiment, due to the setting of the global carbon source result known determination matrix, the calculated nodes can be eliminated, so that the situation that repeated calculation and updating exist at a certain calculation time is avoided, and the final calculation result is more accurate.
Further, for the calculation of carbon emission data at a certain moment, the actual power generation amount and the actual tidal current power of the transformer substation are used as the input of the distributed carbon emission decoupling calculation model to calculate the carbon emission data set of the transformer substation, specifically:
acquiring real-time tidal current power of a plurality of moments before the moment, and calculating actual generated energy and actual tidal current power of a transformer substation at corresponding moments;
and sequentially using the actual generated energy and the actual tidal current power of the transformer substation corresponding to a plurality of moments as the input of the distributed carbon emission decoupling calculation model according to time, calculating the carbon emission data of the transformer substation in the transformer substation group, and updating the carbon emission data group and the global carbon source result known judgment matrix of the transformer substation until the carbon emission data at a certain moment is completed to obtain a finally updated carbon emission data group.
In the embodiment, the carbon emission data of a single node at a certain moment is difficult to calculate, and since most of the load flow data is recorded at the moment, the carbon emission calculation results within a plurality of moments preset before the moment can be used as the carbon emission result at the current moment, so that the problem that the carbon emission of the single node is difficult to calculate is overcome.
Further, the time period is divided into a plurality of moments according to the carbon emission data calculation of the certain time period, and the carbon emission data of each moment are calculated sequentially according to time to obtain a finally updated carbon emission data set of each moment.
In this embodiment, for the carbon emission data calculation for a certain period of time, each time may be taken as an independent calculation individual, each individual is only responsible for the carbon emission data calculation of the corresponding time and outputs the carbon emission data, and the obtained carbon emission data is transmitted to the non-calculation node for the carbon emission compensation calculation.
The embodiment provides a distributed and fast-calculated real-time carbon emission calculation method aiming at the problem of real-time carbon emission monitoring, the traditional carbon flow tracing power flow calculation process is saved by collecting real-time power flow and decoupling system topology, the carbon emission of each node is not centralized, the obtained data has no coupling relation, and the method is more in line with the communication condition of an actual power system.
In order to more clearly illustrate the technical implementation process of the present invention and to highlight the purpose and achieved technical effects thereof, the embodiment specifically provides a practical application scenario, wherein the related parameters and expressions are only applications of routine expressions by those skilled in the art, and cannot be interpreted as limitations on the protection scope of the present invention.
The embodiment provides a method for monitoring carbon emission of a transformer substation, which specifically comprises the following steps:
for obtaining topology information of an electric power system, determining a power generation connection relation and a substation branch connection relation, firstly, according to an actual electric power system definition diagram G, which is represented as a set (V, E), wherein V is a node set of each connection line of the system, and includes a power plant set M and a substation set N (M power plants and N substation nodes). And E is an edge connecting each power system node, if a line exists in the actual system, the corresponding element is assigned to be 1, otherwise, the corresponding element is assigned to be 0, and the following steps are performed:
wherein e is ij Representing the connection relationship between the ith node and the jth node. The connection relation of the power generation and the branch of the transformer substation can be determined according to the edge of the systemThe set E is determined by a power generation connection matrix u 1 And substation branch connection matrix u 2 Specifically, the method comprises the following steps:
next, emission data is initialized
Carbon emission data of a power plant is determined according to its power generation type and carbon storage technology. Carbon emission data for environmentally friendly power plants (hydroelectric, wind and photovoltaic) can be considered as 0kg/kwh; the carbon emission value of the traditional thermal power plant is large (such as the value of a gas plant can be assigned to 0.5kg/kwh, the value of a fuel plant can be assigned to 0.6kg/kwh, the value of a gas plant can be assigned to 1.05kg/kwh, and the specific value can be determined according to the carbon sequestration technology and the coal quality); the carbon emission values for a power plant incorporating a carbon capture device are lower than those for a power plant not incorporating a carbon capture device. The initialized emission data may be calculated as an initial amount of subsequent carbon emission data.
S2: the method for acquiring the real-time tidal power of the power system comprises the following steps:
the method comprises the following steps that real-time power flow data of the power system are obtained through an intelligent terminal of the power system, and under the condition that the topology of the actual power system has edges, real-time power flow power exists in a line, and the calculation is as follows:
wherein,
kth loop representing ith and jth nodes of a representational measurementThe power data of the way is used as,
represents the maximum power constraints of the ith and jth nodes,/ ij Representing the number of lines, P, to which the ith and jth nodes are connected ij The transmission power of the ith node and the jth node.
S3: calculating actual generating capacity and actual tidal current power of the transformer substation according to the power generation connection relation, the transformer substation branch connection relation and the real-time tidal current power, and specifically:
the actual generating capacity and the actual tidal current power of the transformer substation can be determined according to the side set E of the system, so that the actual generating capacity u is calculated by combining the generating connection relation, the transformer substation branch connection relation and the real-time tidal current power 11 And the actual tidal current power u of the transformer substation 22 The method comprises the following steps:
s4: determining a line carbon source node of the power system according to the real-time tidal current data, and determining a transformer station group connected with the line carbon source node, wherein the method specifically comprises the following steps:
the line carbon source node of each line in the power system is determined according to the real-time load flow data of the power system, so that for a node connected with the line carbon source node, if the carbon emission data of the line carbon source node is known, the carbon emission data of the node can be calculated, and the carbon emission coefficient does not need to be solved by solving n equation sets, so that a distributed carbon emission decoupling calculation model can be constructed for calculation.
S5: the method comprises the following steps of constructing a distributed carbon emission decoupling calculation model, converting a recursion calculation process of a traditional power flow equation set into an information interaction calculation process among all transformer substations taking a line carbon source node as a core, and specifically comprising the following steps of:
converting a recursion calculation process of a traditional power flow equation set, namely a traditional carbon emission factor calculation process:
converting into a distributed carbon emission decoupling calculation model:
when the i node meets the carbon row calculation, after the calculation is finished, the judgment matrix with the known global carbon source result is updated to u 3 (i) =1. And according to the distributed carbon emission decoupling calculation model, the n equation sets are converted into carbon emission data of the calculation decoupling network, and the nodes are only divided into the front order and the back order of carbon emission calculation and are not mutually coupled with each other.
S6: calculating a carbon emission data set of the transformer substation group by taking the actual generated energy and the actual tidal current power of the transformer substation as the input of a distributed carbon emission decoupling calculation model;
s7: and acquiring the carbon emission data of the transformer substation to be monitored according to the carbon emission data group of the transformer substation, and finishing the carbon emission monitoring of the transformer substation.
It should be noted that, for a practical system, it is difficult to solve the carbon emission data of each single time node, and since most of the power flow data is recorded at a time, the carbon emission calculation results at several times before the time can be used as the carbon emission result at the current time. For the carbon emission data calculation in a certain time period, each time can be used as an independent calculation individual, each individual is only responsible for the carbon emission data calculation of the corresponding time and outputs the carbon emission data, and the obtained carbon emission data is transmitted to the non-calculation nodes to perform the carbon emission supplement calculation.
It needs to be further explained that, when the distributed carbon emission decoupling calculation model is applied to an actual power system, the power system with the substation node n needs to independently calculate n times to finish the calculationCalculation of carbon emission data at the moment, so for each time, the data at the previous t-p moment is accessed (to ensure that calculation is not missed, the embodiment takes p = n-1), and the u is accessed in a recycling way 3 (t-p) sites other than 1 were subjected to carbon emission calculations. The specific implementation steps are as follows:
stage one: acquiring initial carbon emission data according to power generation characteristics of a power plant, and connecting matrix e of topology of power system ij The electricity generation connection matrix u 1 And substation branch connection matrix u 2 Initializing a calculation period T;
and a second stage: the intelligent terminal receives data from a connected transformer substation and a power plant, and corrects real-time power flow data according to the maximum line capacity, the multi-circuit line and the specific power system topology so as to correct the actual current actual power generation amount u 11 And the actual tidal current power u of the transformer substation 22 。
And a third stage: initialization u 3 (i) All 0 vectors are obtained, the node directly connected with the power station is regarded as a line carbon source node set calculated at the current time, carbon emission data at a plurality of moments before the current time, namely t-p moment, are independently calculated and subjected to data updating, and the u used by the currently calculated node pairs is updated 3 (i) 1, outputting carbon emission data at the moment;
and a fourth stage: and (5) repeatedly executing the calculation of the third stage until t-p = t by letting t-p = t-p +1, namely calculating the time which is one moment before the t-p time. In the stage, n transformer substations can be traversed, and line carbon source nodes meeting carbon emission calculation are searched and added into a line carbon source node set for calculation; if u is corresponding to a certain node 3 (i) If the number of the nodes is 1, the nodes are removed in the subsequent calculation, and finally, a carbon emission data set of the substation group is output;
and a fifth stage: and for the calculation period T, executing the processes from the first stage to the fourth stage at each moment, and finally obtaining the carbon emission data set of the substation group at each moment in the calculation period T.
In the embodiment, for the carbon emission data calculation of the calculation period T, each time is taken as an independent calculation individual, each individual is only responsible for the carbon emission data calculation of the corresponding time and outputs the carbon emission data, and the obtained carbon emission data is transmitted to the non-calculation node for the carbon emission supplement calculation.
The method for monitoring the carbon emission of the transformer substation, provided by the embodiment, can be used for rapidly acquiring the carbon emission data of each transformer substation node of the power system, improving the monitoring on the carbon emission data of the transformer substation, facilitating the clearing of the specific change process of the carbon emission of a power supplier by a user, well responding to the low-carbon emission reduction call, making a reasonable power utilization plan according to the monitoring result, comprehensively scoring the nodes of the power system, and having good application value in actual monitoring.
Referring to fig. 2, the present embodiment provides a substation carbon emission monitoring system, which is used for implementing a substation carbon emission monitoring method, and includes a topology acquisition module, a tidal current power acquisition module, an input amount 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:
the topological structure acquisition module is used for acquiring topological information of the power system and determining a power generation connection relation and a substation branch connection relation;
the power flow power acquisition module is used for acquiring real-time power flow power of the power system;
the input quantity calculation module is used for calculating actual generating capacity and actual tidal current power of the transformer substation according to the power generation connection relation, the transformer substation branch connection relation and the real-time tidal current power;
the transformer station group determining module is used for determining a line carbon source node of the power system according to the real-time power flow data and determining a transformer station group connected with the line carbon source node;
the calculation model construction module is used for constructing a distributed carbon emission decoupling calculation model and converting a recursive calculation process of a traditional power flow equation set into an information interaction calculation process among all transformer substations taking a line carbon source node as a core;
the carbon emission data set calculation module is used for taking the actual generated energy and the actual tidal current power of the transformer substation as the input of the distributed carbon emission decoupling calculation model and calculating the carbon emission data set of the transformer substation;
and the carbon emission data acquisition module is used for acquiring the carbon emission data of the transformer substation to be monitored according to the carbon emission data set of the transformer substation to complete the carbon emission monitoring of the transformer substation.
Further, the tidal current power obtaining module is configured to obtain real-time tidal current power of the power system, and specifically includes: acquiring real-time power flow data of a power system to be monitored and correcting the real-time power flow data; and calculating real-time power flow according to the corrected real-time power flow data.
Further, the calculation model construction module is used for constructing a distributed carbon emission decoupling calculation model, and converting a recursive calculation process of a traditional power flow equation set into an information interaction calculation process among all transformer substations taking a line carbon source node as a core, and specifically comprises the following steps:
constructing a distributed carbon emission decoupling calculation model, which specifically comprises the following steps:
in the formula: c. C i Representing carbon emission data of an ith substation; n represents that the transformer substation is correspondingly connected with n line carbon source nodes; u. u 11 (i, k) represents the actual power generation amount of the kth line carbon source node connected with the ith substation;
representing a carbon emission factor of a kth line carbon source node; u. of 3 (j)· 22 (j,i)>0 denotes that the carbon emission of substation i and line carbon source node j is known, u 3 (j) The result of the global carbon source is known, the initial value of the judgment matrix is 0, and when the carbon emission of the line carbon source node j is calculated, the judgment matrix is updated to be u 3 (j)＝1；u 22 (j, i) the actual tidal current power of the line carbon source node j flowing into the transformer substation i is represented; c. C j Representing carbon emission data of a corresponding jth substation connected to the substation;
representing the carbon emission of the substation i flowing into the line carbon source node j;
through a distributed carbon emission decoupling calculation model, a recursion calculation process of a traditional power flow equation set is converted into an information interaction calculation process among all transformer substations taking a line carbon source node as a core.
Further, for the carbon emission data calculation at a certain time, the carbon emission data group calculation module is configured to calculate the carbon emission data group of the substation group by using the actual power generation amount and the actual tidal current power of the substation as the input of the distributed carbon emission decoupling calculation model, and specifically:
acquiring real-time tidal current power of a plurality of moments before the moment, and calculating actual generated energy and actual tidal current power of a transformer substation at the corresponding moment;
and sequentially using the actual generated energy and the actual tidal current power of the transformer substation corresponding to a plurality of moments as the input of the distributed carbon emission decoupling calculation model according to time, calculating the carbon emission data of the transformer substation in the transformer substation group, and updating the carbon emission data group and the global carbon source result known judgment matrix of the transformer substation until the carbon emission data at a certain moment is completed to obtain a finally updated carbon emission data group.
Further, in the carbon emission data group calculation module, the time period is divided into a plurality of moments according to the carbon emission data calculation of the time period, and the carbon emission data of each moment is calculated according to time sequence, so that the carbon emission data group finally updated at each moment is obtained.
The transformer substation carbon emission monitoring system provided by the embodiment can quickly acquire the carbon emission data of each transformer substation node of the power system, improves the monitoring on the carbon emission data of the transformer substation, is convenient for a user to clearly see the specific change process of the carbon emission of a power supply side, well responds to low carbon emission reduction calls, can make a reasonable power utilization plan according to a monitoring result, comprehensively scores the nodes of the power system, and has good application value in actual monitoring.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. A transformer substation carbon emission monitoring method is characterized by comprising the following steps:
acquiring topological information of a power system, and determining a power generation connection relation and a substation branch connection relation;
acquiring real-time tidal current power of a power system;
calculating actual generating capacity and actual tidal current power of the transformer substation according to the power generation connection relation, the transformer substation branch connection relation and the real-time tidal current power;
determining a line carbon source node of the power system according to the real-time power flow data, and determining a transformer station group connected with the line carbon source node;
constructing a distributed carbon emission decoupling calculation model, and converting a recursion calculation process of a traditional power flow equation set into an information interaction calculation process among all transformer substations taking a line carbon source node as a core;
calculating a carbon emission data set of the transformer substation by taking the actual generated energy and the actual tidal current power of the transformer substation as the input of a distributed carbon emission decoupling calculation model;
and acquiring the carbon emission data of the transformer substation to be monitored according to the carbon emission data group of the transformer substation, and finishing the carbon emission monitoring of the transformer substation.
2. The method for monitoring carbon emission of the transformer substation according to claim 1, wherein the step of obtaining the real-time tidal power of the power system to be monitored specifically comprises the following steps:
acquiring real-time power flow data of a power system to be monitored and correcting the real-time power flow data;
and calculating the real-time power flow according to the corrected real-time power flow data.
3. The method for monitoring carbon emission of the transformer substation according to claim 1, wherein the method for constructing the distributed carbon emission decoupling calculation model converts a recursive calculation process of a traditional power flow equation set into information interaction calculation among the transformer substations with a line carbon source node as a core, and specifically comprises the following steps:
constructing a distributed carbon emission decoupling calculation model, which specifically comprises the following steps:
in the formula: c. C i Representing carbon emission data of an ith substation; n represents that the transformer substation is correspondingly connected with n line carbon source nodes; u. of 11 (i, k) represents the actual power generation amount of the kth line carbon source node connected with the ith substation;
representing a carbon emission factor of a kth line carbon source node; u. of 3 (j)· 22 (j,i)>0 denotes that the carbon emission of substation i and line carbon source node j is known, u 3 (j) The initial value of the judgment matrix for the global carbon source result is 0, and the judgment matrix is updated to u after the carbon emission of the line carbon source node j is calculated 3 (j)＝1；u 22 (j, i) the actual tidal current power of the line carbon source node j flowing into the transformer substation i is represented; c. C j Representing carbon emission data of a corresponding jth substation connected to the substation;
representing the carbon emission of the substation i flowing into the line carbon source node j;
through a distributed carbon emission decoupling calculation model, a recursion calculation process of a traditional power flow equation set is converted into an information interaction calculation process among all transformer substations taking a line carbon source node as a core.
4. A method for monitoring carbon emission of a transformer substation according to any one of claims 1 to 3, wherein for calculation of carbon emission data at a certain time, the carbon emission data set of the transformer substation is calculated by using the actual power generation amount and the actual tidal current power of the transformer substation as the input of the distributed carbon emission decoupling calculation model, specifically:
acquiring real-time tidal current power of a plurality of moments before the moment, and calculating actual generated energy and actual tidal current power of a transformer substation at the corresponding moment;
and sequentially using the actual generated energy and the actual tidal current power of the transformer substation corresponding to a plurality of moments as the input of the distributed carbon emission decoupling calculation model according to time, calculating the carbon emission data of the transformer substation in the transformer substation group, and updating the carbon emission data group and the global carbon source result known judgment matrix of the transformer substation until the carbon emission data at a certain moment is completed to obtain a finally updated carbon emission data group.
5. The method for monitoring carbon emission of the transformer substation according to claim 4, wherein the time period is divided into a plurality of moments according to the calculation of the carbon emission data of the time period, and the carbon emission data of each moment is calculated sequentially according to time to obtain a finally updated carbon emission data set of each moment.
6. A transformer substation carbon emission monitoring system is characterized by comprising a topological structure acquisition module, a tidal current power acquisition module, an input quantity calculation module, a transformer substation group determination module, a calculation model construction module, a carbon emission data group calculation module and a carbon emission data acquisition module; wherein:
the topological structure acquisition module is used for acquiring topological information of the power system and determining a power generation connection relation and a substation branch connection relation;
the power flow power acquisition module is used for acquiring real-time power flow power of the power system;
the input quantity calculation module is used for calculating actual generating capacity and actual tidal current power of the transformer substation according to the power generation connection relation, the transformer substation branch connection relation and the real-time tidal current power;
the transformer station group determining module is used for determining a line carbon source node of the power system according to the real-time power flow data and determining a transformer station group connected with the line carbon source node;
the calculation model building module is used for building a distributed carbon emission decoupling calculation model and converting a recursive calculation process of a traditional power flow equation set into an information interaction calculation process among all transformer substations taking a line carbon source node as a core;
the carbon emission data set calculation module is used for taking the actual generated energy and the actual tidal current power of the transformer substation as the input of the distributed carbon emission decoupling calculation model and calculating the carbon emission data set of the transformer substation;
and the carbon emission data acquisition module is used for acquiring the carbon emission data of the transformer substation to be monitored according to the carbon emission data group of the transformer substation so as to complete the carbon emission monitoring of the transformer substation.
7. The substation carbon emission monitoring system according to claim 6, wherein the tidal current power acquisition module is configured to acquire real-time tidal current power of an electric power system, and specifically comprises:
acquiring real-time power flow data of a power system to be monitored and correcting the real-time power flow data;
and calculating the real-time power flow according to the corrected real-time power flow data.
8. The substation carbon emission monitoring system according to claim 6, wherein the calculation model construction module is configured to construct a distributed carbon emission decoupling calculation model, and convert a recursive calculation process of a conventional power flow equation set into an information interaction calculation process between substations taking a line carbon source node as a core, and specifically comprises:
constructing a distributed carbon emission decoupling calculation model, which specifically comprises the following steps:
in the formula: c. C i Representing carbon emission data of an ith substation; n represents that the transformer substation is correspondingly connected with n line carbon source nodes; u. of 11 (i, k) indicates connection to the ith substationThe actual power generation amount of the carbon source node of the kth line is connected;
representing a carbon emission factor of a kth line carbon source node; u. of 3 (j)· 22 (j,i)>0 denotes that the carbon emission of substation i and line carbon source node j is known, u 3 (j) The result of the global carbon source is known, the initial value of the judgment matrix is 0, and when the carbon emission of the line carbon source node j is calculated, the judgment matrix is updated to be u 3 (j)＝1；u 22 (j, i) the actual tidal current power of the line carbon source node j flowing into the transformer substation i is represented; c. C j Representing carbon emission data of a corresponding jth substation connected to the substation;
representing the carbon emission of the substation i flowing into the line carbon source node j;
through a distributed carbon emission decoupling calculation model, a recursion calculation process of a traditional power flow equation set is converted into an information interaction calculation process among all transformer substations taking a line carbon source node as a core.
9. The substation carbon emission monitoring system according to any one of claims 6 to 8, wherein for the calculation of carbon emission data at a certain time, the carbon emission data set calculation module is configured to calculate a carbon emission data set of a substation group by using an actual power generation amount and an actual tidal current power of the substation as inputs of the distributed carbon emission decoupling calculation model, specifically:
acquiring real-time tidal current power of a plurality of moments before the moment, and calculating actual generated energy and actual tidal current power of a transformer substation at the corresponding moment;
and sequentially using the actual generated energy and the actual tidal current power of the transformer substation corresponding to a plurality of moments as the input of the distributed carbon emission decoupling calculation model according to time, calculating the carbon emission data of the transformer substation in the transformer substation group, and updating the carbon emission data group and the global carbon source result known judgment matrix of the transformer substation until the carbon emission data at a certain moment is completed to obtain a finally updated carbon emission data group.
10. The substation carbon emission monitoring system according to claim 9, wherein in the carbon emission data set calculation module, the time period is divided into a plurality of moments for carbon emission data calculation of a certain time period, and the carbon emission data of each moment is calculated in time sequence to obtain a finally updated carbon emission data set of each moment.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116632829A (en) * | 2023-05-29 | 2023-08-22 | 南方电网能源发展研究院有限责任公司 | Carbon emission factor prediction method, system, computer device, and storage medium |
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| CN116632829A (en) * | 2023-05-29 | 2023-08-22 | 南方电网能源发展研究院有限责任公司 | Carbon emission factor prediction method, system, computer device, and storage medium |
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