CN114465351A - Method and system for generating topological structure of low-voltage distribution network - Google Patents
Method and system for generating topological structure of low-voltage distribution network Download PDFInfo
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- CN114465351A CN114465351A CN202111648791.5A CN202111648791A CN114465351A CN 114465351 A CN114465351 A CN 114465351A CN 202111648791 A CN202111648791 A CN 202111648791A CN 114465351 A CN114465351 A CN 114465351A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/10—Power transmission or distribution systems management focussing at grid-level, e.g. load flow analysis, node profile computation, meshed network optimisation, active network management or spinning reserve management
Abstract
The invention provides a method and a system for generating a topological structure of a low-voltage distribution network, which relate to the technical field of power detection and comprise the following steps: step S1, taking each branch box and each meter box as a topological node, and respectively collecting historical current data at each topological node; step S2, processing the historical current data of each topological node to obtain a weight value between each two topological nodes, and constructing a low-voltage distribution network topological structure corresponding to the low-voltage distribution network according to each weight value. The method has the advantages of improving the construction efficiency of the low-voltage distribution network topological structure and reducing the construction cost of the low-voltage distribution network topological structure.
Description
Technical Field
The invention relates to the technical field of power detection, in particular to a method and a system for generating a topological structure of a low-voltage distribution network.
Background
At present, with the continuous development of cities, low-voltage power distribution networks for distributing power in cities are also continuously expanding in order to adapt to the continuously increasing power loads. Each power supply enterprise manages each power distribution area in a digital manner, wherein each power distribution area refers to a range for transmitting electric energy supported by a transformer in a low-voltage power distribution network.
In the processes of capacity expansion, transformation and the like of the low-voltage distribution network, the line distribution structure in the distribution area changes along with the change of the line distribution structure, and the defects that a line topological graph for recording the line distribution structure in the distribution area is not updated timely, the line distribution structure recorded in the existing line data is not accurate and the like exist, so that inconvenience is caused to the daily maintenance of each line in the low-voltage distribution network required by a power supply enterprise; on the other hand, when a power supply enterprise carries out line loss calculation on the low-voltage distribution network, due to the fact that line data are incomplete, a line topological graph and an actual line distribution structure are in and out, line loss calculation is inconsistent with the actual line loss situation, and the operation risk of the power supply enterprise is increased.
In addition, when a traditional line topological graph of the low-voltage distribution network is constructed, special equipment is needed to be used, characteristic signals are input to line nodes in the transformer area through the special equipment, the characteristic signals are monitored, the topological structure of the whole transformer area is obtained, a large amount of time and labor are consumed, and the cost required by using the special equipment is high.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a method for generating a topological structure of a low-voltage distribution network, wherein the low-voltage distribution network comprises a plurality of distribution areas, a plurality of branch boxes are arranged in each distribution area, and each branch box is connected with at least one meter box, so that the method comprises the following steps:
step S1, taking each branch box and each meter box as a topological node respectively, and collecting historical current data at each topological node respectively;
step S2, processing the historical current data of each topological node to obtain a weight value between each two topological nodes, and constructing a low-voltage distribution network topological structure corresponding to the low-voltage distribution network according to each weight value.
Preferably, the step S2 includes:
step S21, processing according to the historical current data to obtain the correlation degree between every two topological nodes, and taking the correlation degree as the weight value;
step S22, arranging all the weight values in the order from small to large to form a weight sequence;
and step S23, sequentially taking out the largest weight value from the weight sequence, and establishing a connection relation between the two topology nodes corresponding to the weight values until all the topology nodes establish the connection relation, so as to obtain the low-voltage distribution network topology structure.
Preferably, in step S21, the correlation degree is a pearson correlation coefficient or mutual information between two topology nodes.
Preferably, before executing the step S2, the method further includes: filling data missing of each historical current data;
and/or noise removal;
and/or normalizing to obtain preprocessed data;
in step S2, the preprocessed data is used as the historical current data to process to obtain the weight values between each two topology nodes, and the low-voltage distribution network topology structure corresponding to the low-voltage distribution network is constructed according to the weight values.
Preferably, after the step S2 is executed, a topology optimization process is further included, including:
step A1, extracting each father node and each child node associated with the father node from the topological structure of the low-voltage distribution network, and judging whether each father node and each child node associated with the father node accord with a kirchhoff law or not;
if so, outputting the low-voltage distribution network topological structure as an optimized topological structure, and then quitting;
if not, turning to step A2;
and A2, performing topological structure optimization on the father nodes which do not accord with the kirchhoff law and the child nodes which are associated with the father nodes, generating and outputting the optimized topological structure, wherein each father node and each associated child node in the optimized topological structure accord with the kirchhoff law.
Preferably, the step a2 includes:
step A21, adding the father nodes which do not conform to the kirchhoff law into an error father node set, and adding the child nodes which are associated with the father nodes into an error child node set;
step A22, for each father node in the wrong father node set, processing to obtain a plurality of groups of child nodes meeting the kirchhoff law between the wrong child node set and the father node, wherein the child nodes form a plurality of node combinations;
step A23, extracting an effective node combination from each node combination for each father node, and removing the child nodes in the effective node combination and the father nodes corresponding to the effective node combination from the wrong child node set and the wrong father node set respectively;
and A24, repeatedly executing the step A23 until the father node does not exist in the wrong father node set and the child node does not exist in the wrong child node set, and correcting the connection relation between each father node and each child node in the corresponding valid node combination according to each father node and the corresponding valid node combination to generate and output the optimized topological structure.
Preferably, in the step a22, for each parent node in the faulty parent node set, a backtracking algorithm is used to process to obtain a plurality of groups of child nodes that satisfy the kirchhoff law between the faulty child node set and the parent node, and the plurality of groups of child nodes form each node combination.
Preferably, in the step a23, all the node combinations are sorted in descending order according to the average edge weight value of each node combination to obtain a combination sequence, and the node combination with the top sorting order is selected from the combination sequence to be output as the valid node combination.
Preferably, a system for generating a topology structure of a low-voltage distribution network is further provided, where in accordance with the generating method in any one of the above, a low-voltage distribution network includes a plurality of areas, each of the areas is provided with a plurality of branch boxes, and each of the branch boxes is connected to at least one meter box, the generating system includes:
the acquisition module is used for taking each branch box and each meter box as a topological node respectively and acquiring historical current data at each topological node respectively;
and the processing module is connected with the acquisition module and used for processing the historical current data of each topological node to obtain a weight value between every two topological nodes and constructing a low-voltage distribution network topological structure corresponding to the low-voltage distribution network according to each weight value.
Preferably, the system further comprises a topology optimization module, connected to the processing module, and including:
the processing unit is used for extracting each father node and each child node related to the father node from the topological structure of the low-voltage distribution network, and generating and outputting an optimization signal when each father node and each child node related to the father node do not accord with a kirchhoff law;
and the optimization unit is connected with the processing unit and used for carrying out topological structure optimization on the father node which does not accord with the kirchhoff law and the child node which is associated with the father node according to the optimization signal, generating and outputting the optimized topological structure, wherein the father node and the associated child node in the optimized topological structure accord with the kirchhoff law.
The technical scheme has the following advantages or beneficial effects:
(1) the method comprises the steps of calculating a weighted value between two topological nodes according to historical current data of each branch box and each meter box, and constructing a low-voltage distribution network topological structure according to the weighted value, wherein a user does not need to use special equipment to inject characteristic signals into each branch box and each meter box, and monitors the characteristic signals at a station area side to obtain the low-voltage distribution network topological structure;
(2) after the low-voltage distribution network topological structure is constructed, the connection relation between each father node and each child node in the low-voltage distribution network topological structure is checked according to kirchhoff's law, and when the fact that the father node and the child node do not accord with the kirchhoff's law is checked, the corresponding connection relation is adjusted to optimize the topological structure, so that the accuracy and the reliability of the low-voltage distribution network topological structure are improved;
(3) and when the acquired historical current data has data loss, the historical current data is subjected to interpolation processing, and the historical current data subjected to interpolation processing is subjected to standardization processing, so that the reliability of the historical current data is improved, and the correlation degree obtained by processing the historical current data is more consistent with the line distribution condition in the actual low-voltage distribution network.
Drawings
FIG. 1 is a flow chart of a method of generating in accordance with a preferred embodiment of the present invention;
FIG. 2 is a flowchart illustrating the step S2 of the generating method according to the preferred embodiment of the present invention;
FIG. 3 is a detailed flowchart of a topology optimization process in the generation method according to a preferred embodiment of the present invention;
FIG. 4 is a flowchart illustrating the step A2 of the generating method according to the preferred embodiment of the present invention;
FIG. 5 is a control schematic diagram of the generating system in a preferred embodiment of the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present invention is not limited to the embodiment, and other embodiments may be included in the scope of the present invention as long as the gist of the present invention is satisfied.
In a preferred embodiment of the present invention, based on the above problems in the prior art, a method for generating a topology structure of a low voltage distribution network is provided, where the low voltage distribution network includes a plurality of distribution areas, each distribution area is provided with a plurality of branch boxes, and each branch box is connected to at least one meter box, as shown in fig. 1, the method includes:
step S1, taking each branch box and each meter box as a topological node respectively, and collecting historical current data at each topological node respectively;
and step S2, processing the historical current data of each topological node to obtain a weight value between each two topological nodes, and constructing and obtaining a low-voltage distribution network topological structure corresponding to the low-voltage distribution network according to each weight value.
Specifically, in this embodiment, each topology node corresponds to each branch box and each meter box in the actual low-voltage distribution network one to one.
Regarding the branch boxes and the meter boxes as topological nodes, the higher the correlation degree between the corresponding historical current data between every two topological nodes is, the more similar the historical current data between the corresponding branch boxes or between the meter boxes is, the more similar the historical current data is, the less the loss generated when the current flows from one place to another is indicated, and further, the closer the line connection relationship between the two in the low-voltage distribution network is, the tighter the connection relationship between the two corresponding topological nodes in the low-voltage distribution network topological structure is. And establishing a corresponding relation between the correlation degree between the historical current data and a connecting line for communicating the two topological nodes, wherein the higher the correlation degree between the historical current data is, the larger the weight value of the connecting line is. When the method is applied to the construction of the low-voltage distribution network topological structure, the correlation degree is used as the weight value of the connecting line between the topological nodes.
In another embodiment, in a pre-configured topology map, corresponding topology nodes are configured according to the number of branch boxes and meter boxes.
In order to determine the connection relationship between each two topological nodes, a plurality of connection paths between each two topological nodes are obtained in an exhaustive manner, one connection path comprises at least two topological nodes, and if the starting point of the connection path is taken as a father node, other nodes in the connection path are taken as child nodes of the father node.
Because there are other child nodes between the parent node and the child node in a connection path, the connection path can be regarded as a connection line set, and if there is a corresponding connection line between two adjacent topology nodes, the connection line set includes at least one connection line.
The method comprises the steps of obtaining a total weight value of a corresponding connecting line set by counting the weight value corresponding to each connecting line in each connecting line set, comparing the total weight values to obtain a connecting path with the maximum total weight value, and processing the connecting path corresponding to the maximum total weight value to obtain the connection relation between corresponding topological nodes so as to construct the topological structure of the low-voltage distribution network.
In a preferred embodiment of the present invention, as shown in fig. 2, step S2 includes:
step S21, processing according to the historical current data to obtain the correlation degree between each two topological nodes, and taking the correlation degree as a weight value;
step S22, arranging all weight values in a sequence from small to large to form a weight sequence;
and step S23, sequentially taking out the maximum weight values from the weight sequence, and establishing a connection relation between the two topological nodes corresponding to the weight values until all the topological nodes establish the connection relation, so as to obtain the topological structure of the low-voltage distribution network.
Specifically, in this embodiment, as shown in fig. 2, all the topology nodes are added into a node set, one topology node is randomly extracted from the node set as a parent node, and the parent node is removed from the node set, so that each remaining topology node in the node set is used as a child node; and then, calculating the correlation between the historical current data of the father node and the historical current data of all the child nodes, and outputting the correlation as a weight value.
In the preferred embodiment of the present invention, in step S21, the correlation is pearson correlation coefficient or mutual information between two topological nodes.
And calculating the correlation according to the Pearson correlation coefficient, wherein the calculation formula is as follows:
where ρ isijIs one phaseAnd the degree of relation, i is a father node, and j is a child node.
In another embodiment, the correlation is calculated according to the mutual information, and the calculation formula is as follows:
I(Ii,Ij)＝H(Ii)+H(Ij)-H(Ii,Ij)；
wherein, I (I)i,Ij) Is a degree of correlation, i is the parent node and j is the child node.
The correlation degree obtained by calculating the Pearson correlation coefficient or mutual information is used as the weighted value of the connecting line, the calculation process is simple and convenient, and the flexibility and the applicability of the topological structure generation method are improved.
In a preferred embodiment of the present invention, before executing step S2, the method further includes: filling data missing of each historical current data;
and/or noise removal;
and/or normalizing to obtain preprocessed data;
in step S2, the preprocessed data is used as historical current data to process to obtain weight values between each two topology nodes, and a low-voltage distribution network topology structure corresponding to the low-voltage distribution network is constructed according to the weight values.
Specifically, in this embodiment, first, it is necessary to determine whether each historical current data is missing;
if the historical current data is missing, the missing historical current data is supplemented in an interpolation mode;
then, noise reduction processing is carried out on the historical current data which does not need to be supplemented or the supplemented historical current data, and then dispersion standardization processing is carried out on the noise-reduced historical current data; when the correlation is calculated, the correlation between the normalized historical current data corresponding to the parent node and the normalized historical current data corresponding to each child node is calculated.
In a preferred embodiment of the present invention, after the step S2 is executed, a topology optimization process is further included, as shown in fig. 3, including:
step A1, extracting each father node and each child node of the associated father node from the topological structure of the low-voltage distribution network, and judging whether each father node and the associated child node accord with a kirchhoff law or not;
if so, outputting the low-voltage distribution network topological structure as an optimized topological structure, and then quitting;
if not, turning to step A2;
and A2, performing topological structure optimization on the father nodes which do not accord with kirchhoff's law and the child nodes which are associated with the father nodes, generating and outputting an optimized topological structure, wherein each father node and each associated child node in the optimized topological structure accord with kirchhoff's law.
Specifically, in this embodiment, in step a1, a theoretical current value corresponding to each topological node is calculated according to kirchhoff's law and a connection relationship between the topological nodes in the low-voltage distribution network topological structure; if the theoretical current values are not in accordance with the corresponding historical current values, the connection relationship between the topological nodes needs to be optimized.
In the preferred embodiment of the present invention, as shown in fig. 4, step a2 includes:
step A21, adding father nodes which do not conform to kirchhoff's law into an error father node set, and adding child nodes associated with the father nodes into an error child node set;
step A22, aiming at each father node in the wrong father node set, processing to obtain a plurality of groups of child nodes meeting the kirchhoff law between the wrong child node set and the father node, wherein each child node forms a plurality of node combinations;
step A23, extracting an effective node combination from each node combination aiming at each father node, and respectively removing the child nodes in the effective node combination and the father nodes corresponding to the effective node combination from the wrong child node set and the wrong father node set;
and step A24, repeating the step A23 until no father node exists in the wrong father node set and no child node exists in the wrong child node set, and correcting the connection relation between each father node and each child node in the corresponding effective node combination according to each father node and the corresponding effective node combination to generate and output an optimized topological structure.
Specifically, in this embodiment, for each parent node, the node combinations are ordered in descending order according to the weight values between the child nodes and the parent nodes in the node combination to obtain a combination sequence; and then, obtaining a node combination corresponding to the weight value arranged at the top according to the combination sequence, removing the node combination from the error node set, and outputting the node combination corresponding to the weight value arranged at the top as an effective node combination for adjusting the connection relationship between the father node and the child node.
During optimization, the connection relationship between the topology nodes in the original low-voltage distribution network topology structure needs to be deleted, that is, the corresponding connection lines in the low-voltage distribution network topology structure are deleted, and then the connection relationship is reconstructed between the corresponding topology nodes according to the effective node combination obtained by processing in step a 24.
In a preferred embodiment of the present invention, in step a22, for each parent node in the faulty parent node set, a backtracking algorithm is used to process and obtain a plurality of groups of child nodes satisfying kirchhoff's law between the faulty child node set and the parent node, and the plurality of groups of child nodes form each node combination.
Specifically, in the embodiment, after the initial construction of the low-voltage distribution network topology structure is completed, the low-voltage distribution network topology structure is verified and optimized according to kirchhoff's law, so that the accuracy of the low-voltage distribution network topology structure is improved.
In addition, the low-voltage distribution network subjected to capacity expansion and transformation can be automatically updated through the verification process of the low-voltage distribution network topological structure.
In another embodiment, a theoretical current value of each topological node in the current low-voltage distribution network topological structure is compared with historical current data acquired in real time, and when the theoretical current value is detected to be inconsistent with the historical current data acquired in real time, the fact that the line distribution structure in the low-voltage distribution network changes is indicated.
When lines in the low-voltage distribution network change, historical current data of each meter box and each branch box are collected again, and the existing low-voltage distribution network topological structure is adjusted and updated by combining the connection relation among topological nodes in the existing low-voltage distribution network topological structure. The updated topological structure of the low-voltage distribution network is adjusted to conform to the line distribution in the actual low-voltage distribution network, so that the low-voltage distribution network is convenient for the staff to carry out daily routing inspection maintenance, and the reliability and the practicability of the topological structure generation method are improved.
In a preferred embodiment of the present invention, in step a23, all node combinations are sorted in descending order according to the average edge weight value of each node combination to obtain a combination sequence, and the node combination with the top sorting order is selected from the combination sequence as the valid node combination for output.
Specifically, in this embodiment, when constructing the low-voltage distribution network topology structure, the weighting graph may be set as G (V, E, W), where V denotes a node set including all topology nodes, E (i, j) denotes a connection line between a topology node i and a topology node j, W (i.j) denotes a weight corresponding to E (i, j), each topology node is regarded as a tree by using a maximum spanning tree Kruska algorithm, weights corresponding to the connection lines between the topology node i and the topology node j are sorted in a descending order or a descending order, the connection line E (i, j) having the largest weight obtained by the sorting is added to the weighting graph G (V, E, W), and the process is repeated until the weighting graph G (V, E, W) includes all topology nodes.
In a preferred embodiment of the present invention, there is further provided a system for generating a topology structure of a low voltage distribution network, applying any one of the above generating methods, where a low voltage distribution network includes a plurality of distribution areas, each distribution area is provided with a plurality of branch boxes, and each branch box is connected to at least one meter box, and as shown in fig. 5, the generating system includes:
the acquisition module 1 is used for taking each branch box and each meter box as a topological node respectively and acquiring historical current data at each topological node respectively;
and the processing module 2 is connected with the acquisition module 1 and used for processing the historical current data of each topological node to obtain a weight value between each two topological nodes and constructing a low-voltage distribution network topological structure corresponding to the low-voltage distribution network according to each weight value.
In a preferred embodiment of the present invention, the topology optimization module 3 is further included, and the connection processing module 2 includes:
the processing unit 31 is used for extracting each father node and each child node of the associated father node from the topological structure of the low-voltage distribution network, and generating and outputting an optimized signal when each father node and each child node are not in accordance with a kirchhoff law;
and the optimization unit 32 is connected with the processing unit 31 and is used for performing topology structure optimization on the father nodes which do not accord with kirchhoff's law and the child nodes which are associated with the father nodes according to the optimization signal, generating and outputting an optimized topology structure, wherein each father node and each associated child node in the optimized topology structure accord with kirchhoff's law.
In summary, according to the total weight value corresponding to each connection line set between two topological nodes, the connection paths are sequenced to obtain the connection path with the maximum total weight value, the corresponding connection line is constructed between the two topological nodes, then the connection path selection is performed on the next two topological nodes until the connection paths between all the topological nodes are selected completely, the connection paths between all the topological nodes in the topological structure of the low-voltage distribution network are checked, and when the connection paths between the topological nodes are detected to be incorrect, the connection relationship is automatically calibrated.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (10)
1. A method for generating a topological structure of a low-voltage distribution network is characterized in that the low-voltage distribution network comprises a plurality of distribution areas, a plurality of branch boxes are arranged in each distribution area, and each branch box is connected with at least one meter box, so that the method comprises the following steps:
step S1, taking each branch box and each meter box as a topological node respectively, and collecting historical current data at each topological node respectively;
step S2, processing the historical current data of each topological node to obtain a weight value between each two topological nodes, and constructing a low-voltage distribution network topological structure corresponding to the low-voltage distribution network according to each weight value.
2. The generation method according to claim 1, wherein the step S2 includes:
step S21, processing according to the historical current data to obtain the correlation degree between every two topological nodes, and taking the correlation degree as the weight value;
step S22, arranging all the weighted values in the order from small to large to form a weighted sequence;
and step S23, sequentially taking out the largest weight value from the weight sequence, and establishing a connection relation between the two topology nodes corresponding to the weight values until all the topology nodes establish the connection relation, so as to obtain the low-voltage distribution network topology structure.
3. The generation method according to claim 2, wherein in step S21, the correlation is a pearson correlation coefficient or mutual information between two topological nodes.
4. The generation method according to claim 1, wherein executing the step S2 further comprises: filling data missing of each historical current data;
and/or noise removal;
and/or normalizing to obtain preprocessed data;
in step S2, the preprocessed data is used as the historical current data to process to obtain the weight values between each two topology nodes, and the low-voltage distribution network topology structure corresponding to the low-voltage distribution network is constructed according to the weight values.
5. The generation method according to claim 1, wherein after the step S2 is executed, a topology optimization process is further included, which includes:
step A1, extracting each father node and each child node associated with the father node from the topological structure of the low-voltage distribution network, and judging whether each father node and each child node associated with the father node accord with a kirchhoff law or not;
if so, outputting the low-voltage distribution network topological structure as an optimized topological structure, and then quitting;
if not, turning to step A2;
and A2, performing topological structure optimization on the father nodes which do not accord with the kirchhoff law and the child nodes which are associated with the father nodes, generating and outputting the optimized topological structure, wherein each father node and each associated child node in the optimized topological structure accord with the kirchhoff law.
6. The generation method according to claim 5, wherein the step A2 includes:
step A21, adding the father nodes which do not conform to the kirchhoff law into an error father node set, and adding the child nodes which are associated with the father nodes into an error child node set;
step A22, aiming at each father node in the error father node set, processing to obtain a plurality of groups of child nodes meeting the kirchhoff law between the error child node set and the father node, wherein each child node forms a plurality of node combinations;
step A23, extracting an effective node combination from each node combination for each father node, and removing the child nodes in the effective node combination and the father nodes corresponding to the effective node combination from the wrong child node set and the wrong father node set respectively;
and A24, repeatedly executing the step A23 until the father node does not exist in the wrong father node set and the child node does not exist in the wrong child node set, and correcting the connection relation between each father node and each child node in the corresponding valid node combination according to each father node and the corresponding valid node combination to generate and output the optimized topological structure.
7. The generating method according to claim 6, wherein in the step a22, for each parent node in the faulty parent node set, a backtracking algorithm is used to obtain a plurality of groups of child nodes between the faulty child node set and the parent node, and the plurality of groups of child nodes form each node combination.
8. The method according to claim 6, wherein in step a23, all the node combinations are sorted in descending order according to the average edge weight value of each node combination to obtain a combination sequence, and the node combination with the top ranking is selected from the combination sequence as the valid node combination output.
9. A system for generating a topology structure of a low voltage distribution network, wherein the method for generating a topology structure of a low voltage distribution network according to any one of claims 1 to 8 is applied, a low voltage distribution network comprises a plurality of areas, each of the areas is provided with a plurality of branch boxes, each of the branch boxes is connected with at least one meter box, and the system comprises:
the acquisition module is used for taking each branch box and each meter box as a topological node respectively and acquiring historical current data at each topological node respectively;
and the processing module is connected with the acquisition module and used for processing the historical current data of each topological node to obtain a weight value between every two topological nodes and constructing a low-voltage distribution network topological structure corresponding to the low-voltage distribution network according to each weight value.
10. The generation system of claim 9, further comprising a topology optimization module, coupled to the processing module, comprising:
the processing unit is used for extracting each father node and each child node related to the father node from the topological structure of the low-voltage distribution network, and generating and outputting an optimization signal when each father node and each child node related to the father node do not accord with a kirchhoff law;
and the optimization unit is connected with the processing unit and used for carrying out topological structure optimization on the father node which does not accord with the kirchhoff law and the child node which is associated with the father node according to the optimization signal, generating and outputting the optimized topological structure, wherein the father node and the associated child node in the optimized topological structure accord with the kirchhoff law.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116055385A (en) * | 2022-12-30 | 2023-05-02 | 中国联合网络通信集团有限公司 | Routing method, management node, routing node and medium |
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