Networking method and system for power distribution network

Abstract

The invention discloses a power distribution network networking method and system, and the method comprises the steps: collecting the lowest investment cost demands of all power distribution region nodes in a power distribution network center, forming a lowest investment cost demand table, carrying out the networking of all power distribution region nodes according to the lowest investment cost demand table, dividing a power distribution region into a plurality of power distribution sub-regions, and carrying out the networking of all power distribution sub-regions. And networking all the power distribution sub-regions until networking of all the power distribution sub-regions is completed. The network structure of the power distribution network is optimized through the method, so that a power distribution network center uniformly distributes the lowest investment cost of data in the whole network, and the operation cost of the power distribution network is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of distribution network networking, and in particular, to a distribution network networking method and system. Background Art

[0002] With the development of the back-to-back flexible DC (Back-Co-Back VBC-AVDC) technology, using flexible power electronics technology to transform the distribution network has become an important development trend. Applying the back-to-back flexible DC technology to the AC distribution network can change the long-term "closed-loop design, open-loop operation" mode of China's distribution network. It can not only achieve the long-term safe closed-loop operation of any feeder in the distribution network, but also accurately regulate the power flow distribution of the power grid.

[0003] In recent years, controllable devices such as energy storage and flexible loads have developed rapidly, providing more supply-side and demand-side resources to the distribution network, and can provide regulation at the time-series energy level for the power grid. Therefore, if the mutual influence of various controllable flexible resources can be considered overall in the distribution network planning and operation, and the interests of various investment entities can be coordinated, the economy and security of the distribution network operation can be further improved. Summary of the Invention

[0004] To solve the above technical problems, an embodiment of the present invention provides a distribution network networking method and system to solve the technical problems that the traditional fixed network structure in the prior art does not consider the data minimum investment cost requirements between distribution regions, resulting in an unreasonable networking structure and high operating costs.

[0005] A first aspect of an embodiment of the present invention provides a distribution network networking method, and the method includes:

[0006] Obtain the minimum investment cost requirement data between each distribution network area node in the distribution network center, and construct a minimum investment cost requirement table according to each minimum investment cost requirement data;

[0007] Based on the minimum investment cost requirement table, select the two distribution network area nodes with the largest minimum investment cost requirements as the first distribution area group to be expanded, and expand the first distribution area group to be expanded to obtain multiple first expanded distribution area groups;

[0008] Based on each first expanded distribution area group, merge the distribution network area nodes in the minimum investment cost requirement table that belong to the corresponding first expanded distribution area group into distribution network sub-area nodes to obtain an adjusted minimum investment cost requirement table;

[0009] According to the adjusted minimum investment cost requirement table, select the two distribution network sub-area nodes with the largest minimum investment cost requirements as the second distribution area group to be expanded, and expand the second distribution area group to be expanded to obtain multiple second expanded distribution area groups;

[0010] Based on each of the second expanded distribution area groups, the distribution network sub-region nodes in the adjusted minimum investment cost demand table that belong to the second expanded distribution area group are merged into the final distribution network sub-region nodes to obtain the network formation result.

[0011] In a possible implementation manner of the first aspect, expand the first distribution area group to be expanded to obtain multiple first expanded distribution area groups, including:

[0012] Sequentially form a network of the distribution area nodes in the minimum investment cost demand table that have not been networked with the first distribution area group to be expanded to obtain a first set;

[0013] Calculate the out-of-group investment cost demand and in-group investment cost demand of the first set, and obtain the first total cost of the first set according to the out-of-group investment cost demand and the in-group investment cost demand;

[0014] Determine whether the first total cost is less than the distribution network sub-region investment cost threshold. If it is less, expand the first distribution area group to be expanded by using the distribution network area nodes corresponding to the first total cost to obtain multiple first expanded distribution area groups;

[0015] If it is greater, no expansion is performed.

[0016] In a possible implementation manner of the first aspect, calculating the out-of-group investment cost demand and in-group investment cost demand of the first set includes:

[0017] Add the data corresponding to the distribution network area nodes that belong to the first set in both the horizontal axis and the vertical axis of the minimum investment cost demand table to obtain the in-group investment cost demand;

[0018] Add the data corresponding to the distribution network area nodes where any one of the horizontal axis or the vertical axis of the minimum investment cost demand table belongs to the first set to obtain the out-of-group investment cost demand.

[0019] In a possible implementation manner of the first aspect, expanding the first distribution area group to be expanded by using the distribution network area nodes corresponding to the first total cost to obtain multiple first expanded distribution area groups includes:

[0020] Aggregate the distribution network area nodes corresponding to the first total cost to obtain a set of area nodes to be grouped;

[0021] Select the distribution network area node with the minimum out-of-group investment cost demand in the set of area nodes to be grouped and add it to the first distribution area group to be expanded to obtain multiple first expanded distribution area groups.

[0022] In a possible implementation of the first aspect, expanding the second power distribution area group to be expanded to obtain multiple second expanded power distribution area groups, including:

[0023] Sequentially networking the power distribution sub-area nodes that have not been networked in the adjusted minimum investment cost demand table with the second power distribution area group to be expanded to obtain a second set;

[0024] Calculating the out-group investment cost demand and in-group investment cost demand of the second set, and obtaining the second total cost of the second set according to the out-group investment cost demand and in-group investment cost demand;

[0025] Judging whether the second total cost is less than the power distribution sub-area investment cost threshold. If it is less, expanding the second power distribution area group to be expanded by using the power distribution sub-area nodes corresponding to the second total cost to obtain multiple second expanded power distribution area groups;

[0026] If it is greater, no expansion is performed.

[0027] In a possible implementation of the first aspect, calculating the out-group investment cost demand and in-group investment cost demand of the second set includes:

[0028] Adding the data corresponding to the power distribution sub-area nodes that belong to the second set in both the horizontal axis and the vertical axis of the adjusted minimum investment cost demand table to obtain the in-group investment cost demand;

[0029] Adding the data corresponding to the power distribution sub-area nodes where any one of the horizontal axis or the vertical axis of the adjusted minimum investment cost demand table belongs to the second set to obtain the out-group investment cost demand.

[0030] In a possible implementation of the first aspect, expanding the second power distribution area group to be expanded by using the power distribution sub-area nodes corresponding to the second total cost to obtain multiple second expanded power distribution area groups, including:

[0031] Aggregating the power distribution sub-area nodes corresponding to the second total cost to obtain a set of sub-area nodes to be grouped;

[0032] Selecting the power distribution sub-area node with the minimum out-group investment cost demand in the set of sub-area nodes to be grouped and adding it to the second power distribution area group to be expanded to obtain multiple second expanded power distribution area groups.

[0033] To solve the same technical problem, a second aspect of the embodiments of the present invention provides a power distribution network networking system, including an acquisition module, a first expansion module, a first adjustment module, a second expansion module, and a second adjustment module, where,

[0034] The acquisition module is used to acquire the lowest investment cost requirements between the distribution network area nodes in the center of the distribution network, and construct a lowest investment cost requirement table according to the respective lowest investment cost requirements;

[0035] The first expansion module is used to select, based on the lowest investment cost requirement table, the two distribution area nodes with the largest lowest investment cost requirements as the first distribution area group to be expanded, and expand the first distribution area group to be expanded to obtain multiple first expanded distribution area groups;

[0036] The first adjustment module is used to select, according to the adjusted lowest investment cost requirement table, the two distribution network sub-area nodes with the largest lowest investment cost requirements as the second distribution area group to be expanded, and expand the second distribution area group to be expanded to obtain multiple second expanded distribution area groups;

[0037] The second expansion module is used to select, according to the adjusted lowest investment cost requirement table, the two distribution network sub-area nodes with the largest lowest investment cost requirements as the second distribution area group to be expanded, and expand the second distribution area group to be expanded to obtain multiple second expanded distribution area groups;

[0038] The second adjustment module is used to, based on each of the second expanded distribution area groups, merge the distribution network sub-area nodes in the adjusted lowest investment cost requirement table that belong to the second expanded distribution area group into final distribution network sub-area nodes to obtain a network formation result.

[0039] A third aspect of the embodiments of the present invention provides a computer device, including:

[0040] A memory, used to store a computer program;

[0041] A processor, used to implement the steps of the distribution network formation method as in the first aspect when executing the computer program.

[0042] A fourth aspect of the embodiments of the present invention provides a storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the distribution network formation method as in the first aspect are implemented.

[0043] The technical solution of the present invention has the following advantages:

[0044] The power distribution network networking method provided by the embodiment of the present invention collects the minimum investment cost requirements of each power distribution area node in the power distribution network center to form a minimum investment cost requirement table, and networks all the power distribution area nodes according to the minimum investment cost requirement table. After dividing the power distribution area into multiple power distribution sub-areas, network all the power distribution sub-areas until all the power distribution sub-areas are networked. The network structure of the power distribution network is optimized by the above method, so that the power distribution network center evenly distributes the minimum investment cost of data in the whole network, and reduces the operation cost of the power distribution network. Description of the Drawings

[0045] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0046] Figure 1 It is a flowchart of the power distribution network networking method in the embodiment of the present invention;

[0047] Figure 2 It is a system block diagram of the power distribution network networking system in the embodiment of the present invention. Detailed Embodiments

[0048] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0049] In the description of the present invention, it should be noted that the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0050] The power distribution network networking method provided by the embodiment of the present invention is as Figure 1 shown Figure 1 It is a flowchart of the power distribution network networking method, including steps S101 to S105, and the specific steps are as follows:

[0051] S101. Obtain the minimum investment cost requirements between each power distribution network area node in the power distribution network center, and construct a minimum investment cost requirement table according to each minimum investment cost requirement.

[0052] In this embodiment, the minimum investment cost requirements of each distribution area node in the distribution network center are collected and organized into a two-dimensional table, namely the minimum investment cost requirements table. Then, all distribution areas are networked, and the distribution areas are divided into multiple sub-distribution areas.

[0053] As an example of this embodiment, the distribution network center has 6 distribution area nodes, and the upper limit of the investment cost Z of the sub-distribution network area in the distribution network center is 50. The minimum investment cost requirements between the distribution area nodes collected are shown in Table 2 below.

[0054] Table 2 Minimum Investment Cost Requirements Table

[0055] V1 V2 V3 V4 V5 V6 V1 - 0.5 - - 5 - V2 - - - 4 - 5 V3 6.5 3 - - 11 0.5 V4 - 8.5 1.5 - 1 - V5 2.5 - 1 - - - V6 2 7.5 - 2 8 -

[0056] It should be noted that V1-V6 are the nodes of each distribution network area. The numbers in the table, such as 6.5, are the minimum investment cost data that the distribution area node V1 needs to invest in the distribution area node V3 with a networking probability of 6.5.

[0057] S102. Based on the minimum investment cost requirements table, select the two distribution area nodes with the largest minimum investment cost requirements as the first group of distribution areas to be expanded, and expand the first group of distribution areas to be expanded to obtain multiple first expanded groups of distribution areas.

[0058] In this embodiment, the networking of all distribution areas is performed as follows:

[0059] S21: According to the minimum investment cost requirements table, select the two distribution area nodes Vi and Vj with the largest minimum investment cost requirements, and construct a set E = {Vi, Vj} as the group of distribution areas to be expanded. For example, V3 and V5 in Table 2, construct a set E = {V3, V5} as the group of distribution areas to be expanded.

[0060] S22: Expand the set E. Sequentially select the distribution area node Vk that has not been networked, and set A = E ∪ {Vk}, and then take the set A as the group of distribution areas to be selected, and calculate the external investment cost requirement RL and the internal investment cost requirement RP. The investment cost includes the distributed power source, the user electricity load, and the energy storage user cost.

[0061] S23: If there is no distribution area node where RL + RP is less than the upper limit Z of the investment cost of the sub-distribution network area, go to S26;

[0062] S24: If there are some distribution area nodes where the calculated RL + RP is less than the upper limit Z of the investment cost of the sub-distribution network area, then select the node Vk with the smallest external investment cost RL from these distribution area nodes for expanding E, and set E = ∪{Bk}, where ∪ is a coefficient.

[0063] S25: If there are still distribution area nodes that have not been networked, go to S21 to continue networking.

[0064] It should be noted that the set E = {Vi, Vj} refers to the first distribution area group to be expanded, and the first expanded distribution area group refers to the group obtained by expanding the set E.

[0065] In one embodiment, expanding the first distribution area group to be expanded to obtain multiple first expanded distribution area groups includes:

[0066] Sequentially network the distribution area nodes in the lowest investment cost requirement table that have not been networked with the first distribution area group to be expanded to obtain a first set;

[0067] Calculate the investment cost requirement outside the group and the investment cost requirement inside the group of the first set, and obtain the first total cost of the first set according to the investment cost requirement outside the group and the investment cost requirement inside the group;

[0068] Judge whether the first total cost is less than the investment cost threshold of the distribution network sub-region. If it is less, use the distribution network area nodes corresponding to the first total cost to expand the first distribution area group to be expanded to obtain multiple first expanded distribution area groups;

[0069] If it is greater, no expansion is performed.

[0070] In this embodiment, sequentially select the distribution area node Vk that has not been networked, form a set A = E U {Vk} with it and the set E, then use the set A as the distribution area group to be selected, and calculate the investment cost requirement RL outside the group and the investment cost requirement RP inside the group.

[0071] If there is no distribution area node where RL + RP is less than the upper limit Z of the investment cost of the distribution network sub-region, then there is no need to expand the set E. Then the current set E is a complete distribution area group, and connect the distribution area nodes in E with a distribution network sub-region B.

[0072] If there is a distribution area node where RL + RP is less than the upper limit Z of the investment cost of the distribution network sub-region, then expand the set E.

[0073] It should be noted that the first total cost refers to the sum of the investment cost requirement RL outside the group and the investment cost requirement RP inside the group of the set A.

[0074] In one embodiment, calculating the investment cost requirement outside the group and the investment cost requirement inside the first set includes:

[0075] Add the data corresponding to the distribution network area nodes that belong to the first set in both the horizontal axis and the vertical axis of the lowest investment cost requirement table to obtain the investment cost requirement inside the group;

[0076] Add the data corresponding to the distribution network area nodes in either the horizontal or vertical axis of the minimum investment cost demand table that belong to the first set to obtain the out-group investment cost demand.

[0077] In this embodiment, the in-group investment cost demand RP is obtained by adding the data of the distribution area nodes on both the horizontal and vertical axes in the minimum investment cost demand table that belong to set A.

[0078] The out-group investment cost demand RL is obtained by adding the data of the distribution network area nodes where only one of the horizontal or vertical axes in the minimum investment cost demand table belongs to set A.

[0079] In one embodiment, using the distribution network area nodes corresponding to the first total cost to expand the first to-be-expanded distribution area group includes:

[0080] Group the distribution network area nodes corresponding to the first total cost to obtain a set of to-be-grouped area nodes;

[0081] Select the distribution network area node with the minimum out-group investment cost demand in the set of to-be-grouped area nodes and add it to the first to-be-expanded distribution area group to obtain multiple first-expanded distribution area groups.

[0082] In this embodiment, if there are distribution network area nodes where RL + RP is less than the upper limit Z of the distribution network sub-area investment cost, then expand set E. From these distribution network area nodes, select the node Vk with the minimum out-group investment cost RL for expanding E to obtain set E = U{Bk}, where U is a coefficient.

[0083] For example, in combination with Table 2, sequentially select the distribution network area node Vk outside set E, set A = E U {Vk}, and then use set A as the to-be-selected distribution area group to calculate the "out-group investment cost demand RL" and the "in-group investment cost demand RP", and the calculation results are shown in Table 3.

[0084] Table 3 Calculation results of out-group investment cost demand and in-group investment cost demand

[0085] V1 V2 V3 V4 V5 V6 V1 0.5 5 V2 4 5 V3 6.5 3 11 0.5 V4 8.5 1.5 1 V5 2.5 1 V6 2 7.5 2 4

[0086] For example, select distribution area V1, set A = {V1, V3, V5}, and the out-group investment cost demand RL and the in-group investment cost demand RP are calculated as shown in Table 4 below.

[0087] Table 4 First calculation result table

[0088] V1 V2 V3 V4 V5 V6 V1 - 0.5 - - 5 - V2 - - - 4 5 V3 7.5 3 - - 11 0.5 V4 - 8.5 1.5 - 1 - V5 2.5 - 1 - - - V6 2 7.5 - 2 8 -

[0089] According to the above results, if the extended node V1 or V2 is selected, the calculated RL + RP is less than the upper limit of the investment cost of the distribution network sub-region, which is 50. Further, select the node V1 with the minimum out-group investment cost RL from nodes V1 and V2, and expand the set E, that is, the set U{V1} = {V1, V3, V5}, which is the distribution network sub-region B1.

[0090] It should be noted that the first set refers to the set of candidate distribution regions, that is, the set formed by selecting the distribution region nodes outside the set E and the set E.

[0091] Perform the next round of expansion of the set E. Sequentially select the distribution region node Vk outside the set E, and the set A = EU{Vk}. Then, use the set A as the set of candidate distribution regions, and calculate the "out-group investment cost requirement RL" and the "in-group investment cost requirement RP". For example, select the distribution region V2, and the set A = {V1, V2, V3, V5}. According to the above operation rule results, there is no node with RL + RP < 50 that can be used to expand E. Therefore, the current set E is a complete distribution region group.

[0092] S103. Based on each first-expanded distribution region group, merge the distribution region nodes in the lowest investment cost requirement table that belong to the corresponding first-expanded distribution region group into distribution network sub-region nodes to obtain an adjusted lowest investment cost requirement table.

[0093] In this embodiment, the operation steps for networking the distribution regions further include:

[0094] S26: The current set E is a complete distribution region group. Connect the distribution region nodes in E with a distribution sub-region B.

[0095] S27: Adjust the lowest investment cost requirement table, that is, merge the nodes in the table that belong to the set E into one item and name it with the distribution sub-region B. The restructured lowest investment cost requirement table is shown in Table 5 below.

[0096] Table 5 Adjusted lowest investment cost requirement table

[0097] B1 V2 V4 V6 B1 3.5 0.5 V2 4 5 V4 2.5 8.5 V6 6 7.5 2

[0098] If there are still distribution region nodes that have not been grouped, then go to select the two distribution region nodes with the largest minimum investment cost requirement as the first candidate expansion distribution region group to continue networking. For example, for the remaining distribution region nodes for networking, select the two nodes V2 and V4 with the largest minimum investment cost requirement, and construct the candidate expansion set E = {V2, V4}.

[0099] S104. Select two sub-region nodes of the distribution network with the largest minimum investment cost requirements from the adjusted minimum investment cost requirement table as the second distribution region group to be expanded, and expand the second distribution region group to be expanded to obtain multiple second expanded distribution region groups.

[0100] In this embodiment, according to the adjusted minimum investment cost requirement table, the sub-regions of the distribution network are networked, and the specific operation steps are as follows:

[0101] S31. Select two sub-region nodes Bi and Bj of the distribution network with the largest minimum investment cost requirements from the adjusted minimum investment cost requirement table, and the set F = {Bi, Bj} as the sub-region group of the distribution network to be expanded;

[0102] S32. Sequentially select the sub-region nodes Bk of the distribution network that have not been networked, and the set B = EU{Bk}, and then use the set B as a candidate sub-region group of the distribution network to calculate its external investment cost requirement RL and internal investment cost requirement RP;

[0103] S33. If there is no sub-region node of the distribution network where RL + RP is less than the investment cost upper limit Z of the sub-region of the distribution network, then go to S36;

[0104] S34. If there are some sub-region nodes of the distribution network where the calculated RL + RP is less than the investment cost upper limit Z of the sub-region of the distribution network. From these sub-region nodes of the distribution network, select the sub-region node Bk with the smallest external investment cost for expanding F, and the set F = U{Bk}, where U is a coefficient;

[0105] S35. If there are still sub-region nodes of the distribution network that have not been networked, then go to S32.

[0106] In one embodiment, expanding the second distribution region group to be expanded to obtain multiple second expanded distribution region groups includes:

[0107] Sequentially network the sub-region nodes of the distribution network that have not been networked in the adjusted minimum investment cost requirement table with the second distribution region group to be expanded to obtain a second set;

[0108] Calculate the external investment cost requirement and internal investment cost requirement of the second set, and obtain the second total cost of the second set according to the external investment cost requirement and internal investment cost requirement;

[0109] Judge whether the second total cost is less than the investment cost threshold of the sub-region of the distribution network. If it is less, use the sub-region nodes of the distribution network corresponding to the second total cost to expand the second distribution region group to be expanded to obtain multiple second expanded distribution region groups;

[0110] If it is greater, no expansion is performed.

[0111] In this embodiment, the distribution area nodes Vk that are not networked are sequentially selected, and they and the set F are combined to form a set B = EU{Vk}. Then, the set B is used as the candidate distribution area group, and the external investment cost requirement RL and the internal investment cost requirement RP are calculated. If there is no distribution area node for which RL + RP is less than the investment cost upper limit Z of the distribution network sub-area, the set F is not expanded. Then, the current set F is a complete distribution network sub-area group, and the distribution area nodes in F are connected by a distribution sub-area C.

[0112] It should be noted that the second total cost refers to the sum of the external investment cost requirement RL and the internal investment cost requirement RP of the set A.

[0113] In one embodiment, calculating the external investment cost requirement and the internal investment cost requirement of the second set includes:

[0114] Adding the data corresponding to the distribution network sub-area nodes that belong to the second set in both the horizontal and vertical axes of the adjusted minimum investment cost requirement table to obtain the internal investment cost requirement;

[0115] Adding the data corresponding to the distribution network sub-area nodes for which any one of the horizontal or vertical axes of the adjusted minimum investment cost requirement table belongs to the second set to obtain the external investment cost requirement.

[0116] In this embodiment, the internal investment cost requirement RP is obtained by adding the data of the distribution network sub-area nodes in both the horizontal and vertical axes of the minimum investment cost requirement table that belong to the set B;

[0117] The external investment cost requirement RL is obtained by adding the data of the distribution network sub-area nodes for which only one of the horizontal or vertical axes belongs to the set B in the minimum investment cost requirement table.

[0118] In one embodiment, using the distribution network sub-area nodes corresponding to the second total cost to expand the second candidate distribution area group to obtain multiple second expanded distribution area groups, including:

[0119] Combining the distribution network sub-area nodes corresponding to the second total cost to obtain a set of sub-area nodes to be grouped;

[0120] Selecting the distribution network sub-area node with the minimum external investment cost requirement in the set of sub-area nodes to be grouped and adding it to the second candidate distribution area group to obtain multiple second expanded distribution area groups.

[0121] In this embodiment, if there are nodes in the distribution network sub - regions where RL + RP is less than the upper limit Z of the investment cost of the distribution network sub - region, the set F is expanded. From these nodes of the distribution network sub - regions, the node Vk with the smallest out - of - group investment cost RL is selected to expand the set F, and the set F = U{Bk} is obtained, where U is a coefficient.

[0122] S105. Based on each second - expanded distribution area group, the nodes of the distribution network sub - regions in the adjusted minimum investment cost demand table that belong to the second - expanded distribution area group are merged into the final distribution network sub - region nodes to obtain the network formation result.

[0123] In this embodiment, the operation steps for network formation of the distribution network sub - regions further include:

[0124] S36: The current set F is a complete distribution area group, and the distribution area nodes in F are connected with a distribution sub - area C;

[0125] S37: Adjust the minimum investment cost demand table, that is, merge the nodes belonging to the set F in the table into one item named with the distribution sub - area C. If there are still distribution sub - area nodes B that have not been networked, go to S31.

[0126] As an example of this embodiment, in combination with Table 5, for the remaining distribution area nodes to form a network, two nodes V2 and V4 with the largest minimum investment cost demand are selected to construct the set E to be expanded = {V2, V4}, that is, the distribution sub - area B2.

[0127] Since the minimum investment cost demand between the distribution sub - areas does not exceed the upper limit 50 of the investment cost of the distribution network sub - region, these two distribution sub - areas B1 and B2 can be directly connected with the distribution sub - area P1. Thus, the entire distribution network center is networked using several distribution sub - areas.

[0128] The distribution network formation system provided by the embodiment of the present invention, as Figure 2 shown, Figure 2 is the system block diagram of the distribution network formation system, including an acquisition module 201, a first expansion module 202, a first adjustment module 203, a second expansion module 204, and a second adjustment module 205. Among them,

[0129] The acquisition module 201 is used to acquire the minimum investment cost demand between each distribution network area node in the distribution network center, and construct a minimum investment cost demand table according to each minimum investment cost demand;

[0130] The first expansion module 202 is used to select two distribution area nodes with the largest minimum investment cost demand based on the minimum investment cost demand table as the first distribution area group to be expanded, and expand the first distribution area group to be expanded to obtain multiple first - expanded distribution area groups;

[0131] The first adjustment module 203 is configured to merge the distribution area nodes belonging to the corresponding first expanded distribution area group in the lowest investment cost demand table into sub-distribution network area nodes based on each first expanded distribution area group, so as to obtain an adjusted lowest investment cost demand table;

[0132] The second expansion module 204 is configured to select two sub-distribution network area nodes with the largest lowest investment cost demand as the second to-be-expanded distribution area group according to the adjusted lowest investment cost demand table, and expand the second to-be-expanded distribution area group to obtain a plurality of second expanded distribution area groups;

[0133] The second adjustment module 205 is configured to merge the sub-distribution network area nodes belonging to the second expanded distribution area group in the adjusted lowest investment cost demand table into final sub-distribution network area nodes based on each second expanded distribution area group, so as to obtain a network formation result.

[0134] The specific implementation manner of the distribution network formation system is basically the same as the specific embodiment of the above distribution network formation method, and will not be elaborated herein.

[0135] In an embodiment of the present application, a computer device is provided. The computer device includes a memory and a processor. A computer program is stored in the memory. When the processor executes the computer program, the above steps are implemented; for the computer device provided in this embodiment, its implementation principle and technical effects are similar to those of the above method embodiment, and will not be elaborated herein.

[0136] In an embodiment of the present application, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the above steps are implemented; for the computer-readable storage medium provided in this embodiment, its implementation principle and technical effects are similar to those of the above method embodiment, and will not be elaborated herein.

[0137] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0138] The specific embodiments described above further elaborate the purpose, technical solution and beneficial effects of the present invention. It should be understood that the above description is only the specific embodiments of the present invention and is not used to limit the protection scope of the present invention. In particular, for those skilled in the art, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A distribution network networking method, characterized in that: include: Obtaining minimum investment cost demand data between various distribution network regional nodes in the distribution network center, and constructing a minimum investment cost demand table according to each of the minimum investment cost demand data; Based on the minimum investment cost requirement table, two distribution area nodes with the largest minimum investment cost requirements are selected as a first distribution area group to be expanded, and the first distribution area group to be expanded is expanded to obtain multiple first expanded distribution area groups; Based on each of the first expanded distribution area groups, merging the distribution area nodes in the minimum investment cost requirement table belonging to the corresponding first expanded distribution area group into distribution network sub-area nodes to obtain an adjusted minimum investment cost requirement table; According to the adjusted minimum investment cost requirement table, two distribution network sub-area nodes with the largest minimum investment cost requirements are selected as the second distribution area group to be expanded, and the second distribution area group to be expanded is expanded to obtain multiple second expanded distribution area groups; Based on each of the second expanded distribution area groups, the distribution network sub-area nodes belonging to the second expanded distribution area group in the adjusted minimum investment cost requirement table are merged into final distribution network sub-area nodes to obtain a networking result.

2. The method for establishing a power distribution network according to claim 1, wherein: The step of expanding the first to-be-expanded power distribution area group to obtain a plurality of first expanded power distribution area groups includes: The power distribution area nodes that are not networked in the minimum investment cost requirement table are networked with the first power distribution area group to be expanded in sequence to obtain a first set; Calculating the out-of-group investment cost requirement and the in-group investment cost requirement of the first set, and obtaining a first total cost of the first set according to the out-of-group investment cost requirement and the in-group investment cost requirement; Determine whether the first total cost is less than a distribution network sub-region investment cost threshold; if so, use the distribution network region node corresponding to the first total cost to expand the first to-be-expanded distribution region group to obtain a plurality of first expanded distribution region groups; If it is greater, no expansion is performed.

3. The method for establishing a power distribution network according to claim 2, wherein: The calculating of the out-of-group investment cost requirement and the in-group investment cost requirement of the first set includes: Adding the data corresponding to the distribution network regional nodes belonging to the first set in the horizontal axis and the vertical axis of the minimum investment cost requirement table to obtain the intra-group investment cost requirement; The data corresponding to the distribution network regional nodes belonging to the first set in either the horizontal axis or the vertical axis of the minimum investment cost requirement table are added together to obtain the out-of-group investment cost requirement.

4. The method for establishing a power distribution network according to claim 2, wherein: The method of expanding the first to-be-expanded distribution area group by using the distribution network area nodes corresponding to the first total cost to obtain a plurality of first expanded distribution area groups includes: The distribution network regional nodes corresponding to the first total cost are grouped together to obtain a set of regional nodes to be grouped; A distribution network regional node with the smallest out-of-group investment cost requirement in the set of regional nodes to be grouped is selected and added to the first distribution regional group to be expanded, so as to obtain a plurality of first expanded distribution regional groups.

5. The method for establishing a power distribution network according to claim 1, wherein: The step of expanding the second to-be-expanded power distribution area group to obtain a plurality of second expanded power distribution area groups includes: Sequentially network the unnetworked distribution sub-area nodes in the adjusted minimum investment cost requirement table with the second distribution area group to be expanded to obtain a second set; Calculating the out-of-group investment cost requirement and the in-group investment cost requirement of the second set, and obtaining a second total cost of the second set according to the out-of-group investment cost requirement and the in-group investment cost requirement; Determine whether the second total cost is less than a distribution network sub-area investment cost threshold; if so, use the distribution network sub-area nodes corresponding to the second total cost to expand the second to-be-expanded distribution area group to obtain a plurality of second expanded distribution area groups; If it is greater, no expansion is performed.

6. The method for establishing a power distribution network according to claim 5, characterized in that: The calculating the out-of-group investment cost requirement and the in-group investment cost requirement of the second set includes: Adding the data corresponding to the distribution network sub-area nodes belonging to the second set in the horizontal axis and the vertical axis of the adjusted minimum investment cost requirement table to obtain the intra-group investment cost requirement; The data corresponding to the distribution network sub-area nodes belonging to the second set in either the horizontal axis or the vertical axis of the adjusted minimum investment cost requirement table are added to obtain the out-of-group investment cost requirement.

7. The method for establishing a power distribution network according to claim 5, characterized in that: The method of expanding the second to-be-expanded distribution area group by using the distribution network sub-area nodes corresponding to the second total cost to obtain a plurality of second expanded distribution area groups includes: The nodes of the distribution network sub-area corresponding to the second total cost are grouped together to obtain a set of sub-area nodes to be grouped; A distribution network sub-area node with the smallest out-of-group investment cost requirement in the set of sub-area nodes to be grouped is selected and added to the second distribution area group to be expanded, so as to obtain a plurality of second expanded distribution area groups.

8. A distribution network networking system, comprising an acquisition module, a first expansion module, a first adjustment module, a second expansion module and a second adjustment module, wherein: The acquisition module is used to acquire the minimum investment cost requirements between the nodes in each distribution network area in the distribution network center, and construct a minimum investment cost requirement table according to each of the minimum investment cost requirements; The first expansion module is used to select two distribution area nodes with the largest minimum investment cost requirements based on the minimum investment cost requirement table as the first distribution area group to be expanded, and expand the first distribution area group to be expanded to obtain multiple first expanded distribution area groups; The first adjustment module is used for merging the distribution area nodes belonging to the corresponding first expanded distribution area groups in the minimum investment cost requirement table into distribution network sub-area nodes based on each of the first expanded distribution area groups, so as to obtain an adjusted minimum investment cost requirement table; The second expansion module is used to select two distribution network sub-area nodes with the largest minimum investment cost requirements according to the adjusted minimum investment cost requirement table as the second distribution area group to be expanded, and expand the second distribution area group to be expanded to obtain multiple second expanded distribution area groups; The second adjustment module is used to merge the distribution network sub-area nodes belonging to the second expanded distribution area group in the adjusted minimum investment cost requirement table into final distribution network sub-area nodes based on each of the second expanded distribution area groups to obtain a networking result.

9. A computer device, characterized in that: include: Memory for storing computer programs; A processor, configured to implement the distribution network networking method as described in any one of claims 1 to 7 when executing the computer program.

10. A storage medium, characterized in that: The storage medium stores a computer program, and when the computer program is executed by the processor, the steps of the distribution network networking method according to any one of claims 1 to 7 are implemented.

Images