A power distribution network line planning calculation method and device

Abstract

The application discloses a kind of power distribution network line planning calculation method and device, the method includes: according to the street layout information of the park to be planned and block load power information, establish regional street model;According to preset constraint condition, generate park power distribution network line planning model in combination with regional street model;Preset constraint condition includes: power distribution network planning basic constraint condition and actual geographical constraint condition;After constraint condition is generated to meet the constraint condition of park power distribution network line planning model according to preset constraint condition to regional street model;According to park power distribution network line planning model, obtain the power distribution network line planning of the park to be planned after calculation solution is carried out.Therefore, the precision of power distribution network line planning can be improved by using the embodiment of the application.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of data processing, and in particular to a power distribution network line planning method and device. BACKGROUND

[0002] In the traditional power distribution network planning research, the load clusters of blocks are often equivalent to load nodes, and the substations are regarded as power generation nodes. The line planning work mainly determines the connection relationship between nodes, and the tree structure or network structure formed by the connection of load nodes and power generation nodes is taken as the result of power distribution network planning. However, in actual power distribution network planning and engineering construction, whether it is the erection of overhead lines or the laying of underground cables, the construction of power distribution network in cities or parks always needs to consider the actual street and block distribution, and the power lines in cities or parks are always laid along the streets.

[0003] The existing power distribution network line planning method mainly determines the connection relationship between nodes by equivalent load clusters of blocks to load nodes and regarding substations as power generation nodes, and takes the tree structure and network structure formed by the connection between load nodes and power generation nodes as the planning result, without considering the actual geographical relationship such as block and street layout. The planning result will also have a large error and is difficult to guide the actual planning work.

[0004] From the above, the existing power distribution network line planning calculation method only considers the load and substation as load nodes and power generation nodes respectively and plans the power lines therebetween, ignoring the actual geographical constraints, so that the existing power distribution network line planning has the problem of low precision. SUMMARY

[0005] The embodiment of the present application provides a power distribution network line planning calculation method and device, which considers the street layout information and block load power information in the process of calculating the power distribution network line planning, and improves the precision of the power distribution network line planning.

[0006] The first aspect of the present application provides a power distribution network line planning calculation method, comprising:

[0007] establishing a regional street model according to the street layout information and block load power information of the to-be-planned park;

[0008] generating a park power distribution network line planning model according to the preset constraint conditions combined with the regional street model; specifically, the preset constraint conditions include power distribution network planning basic constraint conditions and actual geographical constraint conditions; after the regional street model is constrained according to the preset constraint conditions, a park power distribution network line planning model satisfying the constraint conditions is generated;

[0009] After calculating and solving according to the park power distribution network line planning model, the power distribution network line planning of the to-be-planned park is obtained.

[0010] In a possible implementation manner of the first aspect, the regional street model is established according to the street layout information of the to-be-planned park and the street block load power supply information, and specifically:

[0011] a plurality of segmentation lines are formed according to the street layout information;

[0012] the to-be-planned park is segmented according to the plurality of segmentation lines to form a plurality of street blocks;

[0013] intra-zone load data corresponding to the plurality of street blocks is formed according to the plurality of street blocks and the street block load power supply information;

[0014] a plurality of load blocks are formed by cluster processing according to the intra-zone load data, and the establishment of the regional street model is completed.

[0015] In a possible implementation manner of the first aspect, the plurality of load blocks are formed by cluster processing according to the intra-zone load data, and specifically:

[0016] a load group is formed by cluster processing according to the intra-zone load data;

[0017] streets corresponding to the plurality of segmentation lines are taken as candidate construction lines;

[0018] streets between a plurality of intersections in the street layout information are taken as edges of the load group, and the intersections are taken as nodes of the load group, to form the plurality of load blocks.

[0019] In a possible implementation manner of the first aspect, the park power distribution network line planning model is calculated and solved, and specifically:

[0020] the park power distribution network line planning model is calculated and solved according to the mathematical programming optimization system.

[0021] The second aspect of the present application provides a power distribution network line planning calculation device, which comprises an establishment module, a generation module and a calculation module.

[0022] The establishment module is configured to establish a regional street model according to street layout information of a to-be-planned park and street block load power supply information.

[0023] The generation module is configured to generate a park power distribution network line planning model according to a preset constraint condition in combination with the regional street model, and specifically: the preset constraint condition comprises a power distribution network planning basic constraint condition and an actual geographical constraint condition; after the regional street model is constrained according to the preset constraint condition, the park power distribution network line planning model that meets the constraint condition is generated;

[0024] The calculation module is configured to obtain a power distribution network line planning of the to-be-planned park after calculating and solving the park power distribution network line planning model.

[0025] In a possible implementation manner of the second aspect, the regional street model is established according to the street layout information of the to-be-planned park and the street block load power information, and specifically:

[0026] a plurality of segmentation lines are formed according to the street layout information;

[0027] the to-be-planned park is segmented according to the plurality of segmentation lines to form a plurality of blocks;

[0028] intra-zone load data corresponding to the plurality of blocks is formed according to the plurality of blocks and the street block load power information;

[0029] the intra-zone load data is processed by clustering to form a plurality of load blocks, and the establishment of the regional street model is completed.

[0030] In a possible implementation manner of the second aspect, the intra-zone load data is processed by clustering to form a plurality of load blocks, and specifically:

[0031] a load group is formed according to the intra-zone load data by clustering;

[0032] a street corresponding to the plurality of segmentation lines is taken as a candidate construction line;

[0033] streets between a plurality of intersections in the street layout information are taken as edges of the load group, and the intersections are taken as nodes of the load group, to form a plurality of load blocks.

[0034] In a possible implementation manner of the first aspect, the park power distribution network line planning model is calculated and solved, and specifically:

[0035] the park power distribution network line planning model is calculated and solved by using a mathematical programming optimization system.

[0036] The third aspect of the present application provides a mobile terminal, comprising a processor and a memory, the memory stores computer readable program code, and the processor executes the computer readable program code to realize the steps of the above-mentioned power distribution network line planning calculation method.

[0037] The fourth aspect of the present application provides a storage medium, which stores computer readable program code, and when the computer readable program code is executed, the steps of the above-mentioned power distribution network line planning calculation method are realized.

[0038] Compared with the prior art, the method and device for planning a power distribution network line provided by the embodiment of the application, the method comprises: establishing a regional street model according to street layout information and block load power supply information of a to-be-planned park; generating a park power distribution network line planning model in combination with the regional street model according to a preset constraint condition; the preset constraint condition comprises a power distribution network planning basic constraint condition and an actual geographical constraint condition; generating the park power distribution network line planning model satisfying the constraint condition after the regional street model is constrained according to the preset constraint condition; and obtaining the power distribution network line planning of the to-be-planned park after calculation and solving are performed according to the park power distribution network line planning model.

[0039] The embodiment of the application establishes a regional street model based on the street layout information and block load power supply information of a to-be-planned park, then generates a park power distribution network line planning model by constraining the regional street model according to a preset constraint condition, the preset constraint condition comprises a power distribution network planning basic constraint condition and an actual geographical constraint condition, generates the park power distribution network line planning model satisfying the constraint condition after the regional street model is constrained according to the preset constraint condition, and finally obtains the power distribution network line planning of the to-be-planned park by solving the park power distribution network line planning model. As can be seen from the above, in the process of calculating the power distribution network line planning of the to-be-planned park, the embodiment of the application considers the street layout information and block load power supply information of the to-be-planned park, that is, the actual geographical constraint, so the precision of the power distribution network line planning is improved, thereby more accurately guiding the actual power distribution network line planning work. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 is a flowchart of a method for planning a power distribution network line provided by an embodiment of the application;

[0041] Figure 2 is a structural diagram of a load block provided by an embodiment of the application;

[0042] Figure 3 is a load block data diagram provided by an embodiment of the application;

[0043] Figure 4 is a structural diagram of a device for planning a power distribution network line provided by an embodiment of the application. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0045] Referring to Figure 1 is a flowchart of a calculation method of a power distribution network line planning provided by an embodiment of the present application, comprising S101-S103:

[0046] S101: According to the street layout information of the to-be-planned park and the street block load power supply information, a regional street model is established.

[0047] The street layout information is specifically node layout planning data, and the street block load power supply information comprises related electrical historical data of the street block load, existing substation data and data of the to-be-constructed substation. Step S101 can convert graphical information into data information.

[0048] In the embodiment, the establishment of the regional street model according to the street layout information of the to-be-planned park and the street block load power supply information is specifically as follows:

[0049] According to the street layout information, a plurality of segmentation lines are formed;

[0050] According to the plurality of segmentation lines, the to-be-planned park is segmented to form a plurality of street blocks;

[0051] According to the plurality of street blocks and the street block load power supply information, a plurality of in-district load data corresponding to the street blocks are formed;

[0052] According to the in-district load data, cluster processing is performed to form a plurality of load blocks, and the establishment of the regional street model is completed.

[0053] In a specific embodiment, the cluster processing of the in-district load data to form a plurality of load blocks is specifically as follows:

[0054] According to the in-district load data, cluster processing is performed to form a load group;

[0055] The street corresponding to the plurality of segmentation lines is taken as a candidate construction line;

[0056] The street between a plurality of intersections in the street layout information is taken as an edge of the load group, and the intersection is taken as a node of the load group, and a plurality of load blocks are formed.

[0057] The in-district load data comprises historical load data and long-term planning data in the street block. When the in-district load data is processed in clusters, the characteristics of the power supply line in the to-be-planned actual park power distribution network for user power supply should be considered.

[0058] S102: According to a preset constraint condition, a park power distribution network line planning model is generated in combination with the regional street model.

[0059] In the embodiment, the preset constraint conditions include basic power distribution network planning constraint conditions and actual geographical constraint conditions.

[0060] After the regional street model is constrained according to the preset constraint conditions, the park power distribution network line planning model satisfying the constraint conditions is generated.

[0061] The basic power distribution network planning constraint includes two types of constraint conditions, specifically, basic power distribution network constraint conditions and actual geographical constraint conditions. The basic power distribution network constraint includes decision constraint of power supply line, capacity constraint of power supply line, design capacity constraint of power supply line, node power balance constraint and feeder power constraint. The actual geographical constraint includes line conductivity constraint and actual engineering constraint.

[0062] Further, taking the sum of construction cost and operation and maintenance cost in the power distribution network planning of the park to be planned as the optimization target, considering the preset constraint conditions (i.e., electrical constraint conditions related to the actual power distribution network construction process and geographical information constraint conditions generated by the actual street distribution), a park power distribution network line planning model satisfying various conditions and considering street layout and block load is established.

[0063] In a specific embodiment,

[0064] S103: After calculation and solving according to the park power distribution network line planning model, the power distribution network line planning of the park to be planned is obtained.

[0065] In the embodiment, the calculation and solving according to the park power distribution network line planning model are specifically:

[0066] The park power distribution network line planning model is calculated and solved by a mathematical programming optimization system.

[0067] Further, after the nonlinear constraint in the park power distribution network line planning model is equivalent to a linear constraint by a linearization method, the park power distribution network line planning model is converted into a mixed integer linear model.

[0068] The mixed integer linear model is solved and calculated by a mathematical programming optimization system Gurobi (i.e., a mainstream solver), and the result is the power distribution network line planning with the shortest cable line distance laid in the park power distribution network construction process.

[0069] In a specific embodiment, after the planning basic data is input into the park power distribution network line planning model, the park power distribution network line planning model can calculate and solve according to the planning basic data to obtain the power distribution network line planning of the park to be planned. The planning basic data includes load power supply data, street layout data and related investment data.

[0070] For further illustration of the specific structure of the load block, please refer to Figure 2 , Figure 2 is a structural diagram of the load block provided by an embodiment of the present application.

[0071] From Figure 2 , according to the feature that the power lines of the power distribution network are usually laid along the streets, the streets between the multiple intersections in the street layout information are taken as the edges of the load group, the intersections are taken as the nodes of the load group, and multiple load blocks are formed, the intersections are the nodes of the load blocks, and the streets between the intersections are the street edges of the load blocks.

[0072] For further illustration of the load data corresponding to the load block, please refer to Figure 3 , Figure 3 is a load block data diagram provided by an embodiment of the present application.

[0073] From Figure 3 , the numbers in the load block are the load values, and the unit is megawatt (MW); the black nodes are the substations, i.e., the power generation nodes, and the white nodes are the intersections, i.e., the intersection nodes.

[0074] Further, the power consumption load is concentrated in the blocks in the actual geographical distribution, the power supply line can be connected from any road section of the block and supply power to the loads on both sides, and then the clustering process of the load data in the block is as follows:

[0075]

[0076]

[0077]

[0078]

[0079] wherein, Φ b is a set of load blocks in the pre-planned park; Φ seg is a set of candidate lines; Λ ij is a set of load blocks on both sides of the candidate line ij; Π b represents a set of edges around the load block; formula (1) represents the load L b of the load block; formula (2) represents the total power supply of a line ij; formula (3) represents that the power supply of the line to the load is positive; and formula (4) represents that the power supply of the line ij to the load block is equal to the sum of the injection powers of the nodes at both ends. Formulas (1)-(4) distribute the load in a load block to each street section and complete the power supply by the power supply lines on the street sections.

[0080] In a specific embodiment, the park power distribution network line planning model A can be represented by the following formula:

[0081]

[0082] wherein, represents the unit construction cost of the line and the substation, represents the unit operation and maintenance cost of the line and the substation; ij represents an edge with node i and node j as two end nodes; Φ seg is the set of edges of the park to be planned; k ij is a 0-1 variable, used to represent whether to construct a power supply line on edge ij; represents the planning capacity of edge ij; s i is a 0-1 variable, used to represent whether to construct a substation on node i; f represents the feeder outgoing line connected with the substation; Φ ss represents the set of power generation nodes; Γ i represents the set of feeders connected with power generation node i; represents the design power generation capacity of feeder f.

[0083] In addition to the above (1) ~ (4) formula, the constraint conditions of the park power distribution network line planning model A considering street layout and block load include power upper and lower limit constraint, node power balance constraint, line connectivity constraint and line feeder attribute constraint.

[0084] Specifically, the constraint conditions of the objective function are:

[0085] 1) Decision constraint of power supply line:

[0086]

[0087]

[0088] wherein, M is a maximum value; k ij is a 0-1 variable, representing whether to construct a power supply line on street ij.

[0089] 2) Capacity constraint of power supply line:

[0090]

[0091]

[0092] wherein, represents the design capacity of line ij.

[0093] 3) Design capacity constraint of power supply line:

[0094]

[0095] wherein, formula (10) represents the design capacity of line ij is less than the maximum capacity of line ij.

[0096] 4) Node power balance constraints:

[0097]

[0098]

[0099] wherein, Φ junc represents the set of nodes connected to transformer i, Φ ss represents the set of nodes connected to transformer i; P i represents the injection power of node i.

[0100] 5) Feeder power constraints:

[0101]

[0102]

[0103] wherein, Φ feed represents the set of feeders; i f j f represents the outgoing line of feeder f, line ij. represents the design capacity of feeder f, represents the maximum capacity of feeder f.

[0104] 6) Line conductance constraints:

[0105]

[0106]

[0107] wherein, are 0-1 variables, respectively representing whether node i and line ij belong to feeder f. Formulas (15) and (16) represent line conductance and feeder attribution constraints.

[0108] 7) Real engineering constraints:

[0109]

[0110]

[0111]

[0112]

[0113] Wherein, formula (17) represents line construction logical constraints; formula (18) and (19) represent that line ij and node i can only belong to a feeder; formula (20) represents that feeder construction belongs to its corresponding substation construction. Wherein, 1) ~ 5) in the constraint condition of the above objective function are basic constraint conditions of distribution network, and 6) ~ 7) are actual geographical constraint conditions.

[0114] In order to further illustrate the calculation device of the distribution network line planning, refer to Figure 4 , Figure 4 is a structural schematic diagram of a calculation device of distribution network line planning provided by an embodiment of the application, comprising: an establishing module 401, a generating module 402 and a calculating module 403.

[0115] Wherein, the establishing module 401 is configured to establish a regional street model according to street layout information and block load power supply information of a to-be-planned park;

[0116] The generating module 402 is configured to generate a park distribution network line planning model according to a preset constraint condition in combination with the regional street model;

[0117] The calculating module 403 is configured to obtain distribution network line planning of the to-be-planned park after calculation and solving according to the park distribution network line planning model.

[0118] In the embodiment, the regional street model is established according to the street layout information and the block load power supply information of the to-be-planned park, and specifically:

[0119] A plurality of split lines are formed according to the street layout information;

[0120] The to-be-planned park is segmented according to the plurality of split lines to form a plurality of blocks;

[0121] According to the plurality of blocks and the block load power supply information, a plurality of corresponding intra-district load data of the blocks are formed;

[0122] According to the intra-district load data, cluster processing is performed to form a plurality of load blocks, and the establishment of the regional street model is completed.

[0123] In a specific embodiment, the cluster processing is performed according to the intra-district load data to form a plurality of load blocks, and specifically:

[0124] According to the intra-district load data, cluster processing is performed to form a load group;

[0125] The streets corresponding to the plurality of split lines are taken as candidate construction lines;

[0126] The streets between a plurality of intersections in the street layout information are taken as edges of the load group, and the intersections are taken as nodes of the load group, to form a plurality of the load blocks.

[0127] In a specific embodiment, the garden power distribution network line planning model is calculated and solved according to a mathematical programming optimization system.

[0128] The garden power distribution network line planning model is calculated and solved according to a mathematical programming optimization system.

[0129] A specific embodiment of the present application provides a mobile terminal, comprising a processor and a memory, the memory stores computer readable program code, and the processor implements the steps of the above-mentioned power distribution network line planning calculation method when executing the computer readable program code.

[0130] A specific embodiment of the present application provides a storage medium, which stores computer readable program code, and the steps of the above-mentioned power distribution network line planning calculation method are implemented when the computer readable program code is executed.

[0131] The embodiment of the present application establishes a regional street model according to the street layout information and the street block load power information of the to-be-planned garden through the establishing module 401; generates a garden power distribution network line planning model according to the preset constraint condition in combination with the regional street model through the generating module 402; the preset constraint condition includes a power distribution network planning basic constraint condition and an actual geographical constraint condition; after the regional street model is constrained according to the preset constraint condition, a garden power distribution network line planning model that meets the constraint condition is generated; after calculation and solving are performed according to the garden power distribution network line planning model through the calculating module 403, the power distribution network line planning of the to-be-planned garden is obtained.

[0132] The embodiment of the present application establishes a regional street model based on the street layout information and the street block load power information of the to-be-planned garden; then, the regional street model is constrained according to the preset constraint condition, and a garden power distribution network line planning model is generated; the preset constraint condition includes a power distribution network planning basic constraint condition and an actual geographical constraint condition; after the regional street model is constrained according to the preset constraint condition, a garden power distribution network line planning model that meets the constraint condition is generated; finally, the garden power distribution network line planning model is solved, and the power distribution network line planning of the to-be-planned garden is obtained. As can be seen from the above, in the process of calculating the power distribution network line planning of the to-be-planned garden, the embodiment of the present application considers the street layout information and the street block load power information of the to-be-planned garden, that is, the actual geographical constraint is considered, so that the accuracy of the power distribution network line planning is improved, thereby more accurately guiding the actual power distribution network line planning work.

[0133] The above is the preferred embodiment of the present application, it should be pointed out that, for those skilled in the art, without departing from the principles of the present application, can also make a number of improvements and refinements, these improvements and refinements are also considered to be within the scope of the present application.

Claims

1. A method of computing a power distribution network line plan, characterized by, The method comprises the following steps: According to the street layout information and the block load power supply information of the to-be-planned park, a regional street model is established; According to the preset constraint condition, a park power distribution network line planning model is generated in combination with the regional street model; Specifically, the preset constraint condition comprises a power distribution network planning basic constraint condition and an actual geographical constraint condition; after the regional street model is constrained according to the preset constraint condition, the park power distribution network line planning model that meets the constraint condition is generated; the actual geographical constraint condition comprises a line conduction constraint and an actual engineering constraint; the line conduction constraint is that: The actual engineering constraint is that: wherein, are 0-1 variables, respectively, indicating whether node i and line ij belong to feeder f; ij represents an edge with node i and node j as two end nodes; Φ seg is a set of edges of the to-be-planned park; k ij is a 0-1 variable, used to indicate whether to construct a power supply line on edge ij; s i is a 0-1 variable, used to indicate whether to construct a substation at node i; f represents a feeder outgoing line connected with the substation; Φ ss represents a set of power generation nodes; Γ i represents a set of feeders connected with power generation node i; represents the designed power generation capacity of feeder f; After the park power distribution network line planning model is calculated and solved, the power distribution network line planning of the to-be-planned park is obtained.

2. The method of claim 1, wherein, According to the street layout information and the block load power supply information of the to-be-planned park, a regional street model is established, specifically as follows: According to the street layout information, a plurality of segmentation lines are formed; According to the plurality of segmentation lines, the to-be-planned park is segmented to form a plurality of blocks; According to the plurality of blocks and the block load power supply information, a plurality of in-district load data corresponding to the blocks are formed; The in-district load data are clustered to form a plurality of load blocks, and the establishment of the regional street model is completed.

3. The method of claim 2, wherein, According to the in-district load data, the clustering processing is performed to form a load group; The streets corresponding to the plurality of segmentation lines are taken as candidate construction lines; The streets between a plurality of intersections in the street layout information are taken as edges of the load group, and the intersections are taken as nodes of the load group, to form a plurality of load blocks. According to the park power distribution network line planning model, the calculation and solution are performed, specifically as follows:

4. The method of claim 1, wherein, According to a mathematical programming optimization system, the calculation and solution of the park power distribution network line planning model are performed. The method comprises the following steps:

5. A computing device for power distribution network line planning, the computing device comprising: The establishment module is configured to establish a regional street model according to street layout information and block load power supply information of a to-be-planned park; The generation module is configured to generate a park power distribution network line planning model according to a preset constraint condition in combination with the regional street model; specifically, the preset constraint condition comprises a power distribution network planning basic constraint condition and an actual geographical constraint condition; after the regional street model is constrained according to the preset constraint condition, the park power distribution network line planning model that meets the constraint condition is generated; The calculation module is configured to obtain a power distribution network line planning of the to-be-planned park after the calculation and solution of the park power distribution network line planning model are performed; The actual geographical constraint condition comprises a line conduction constraint and an actual engineering constraint; the line conduction constraint is that: The actual engineering constraint is that: According to the street layout information and the block load power supply information of the to-be-planned park, a regional street model is established, specifically as follows: According to the street layout information, a plurality of segmentation lines are formed; wherein, are 0-1 variables, respectively, indicating whether node i and line ij belong to feeder f; ij represents an edge with node i and node j as two end nodes; Φ seg is a set of edges of the to-be-planned park; k ij is a 0-1 variable, used to indicate whether to construct a power supply line on edge ij; s i is a 0-1 variable, used to indicate whether to construct a substation at node i; f represents a feeder outgoing line connected with the substation; Φ ss represents a set of power generation nodes; Γ i represents a set of feeders connected with power generation node i; represents the designed power generation capacity of feeder f.

6. The power distribution network circuit planning computing device of claim 5, wherein, According to the plurality of segmentation lines, the to-be-planned park is segmented to form a plurality of blocks; ​ ​ According to the plurality of blocks and the block load power supply information, form the corresponding intra-district load data of the plurality of blocks; According to the intra-district load data, perform cluster processing to form a plurality of load blocks, and complete the establishment of the regional street model.

7. The power distribution network circuit planning computing device of claim 6, wherein, According to the intra-district load data, perform cluster processing to form a plurality of load blocks, and complete the establishment of the regional street model. According to the intra-district load data, perform cluster processing to form a plurality of load blocks, and complete the establishment of the regional street model. According to the intra-district load data, perform cluster processing to form a plurality of load blocks, and complete the establishment of the regional street model. According to the intra-district load data, perform cluster processing to form a plurality of load blocks, and complete the establishment of the regional street model.

8. The power distribution network circuit planning computing device of claim 5, wherein, According to the intra-district load data, perform cluster processing to form a plurality of load blocks, and complete the establishment of the regional street model. According to the intra-district load data, perform cluster processing to form a plurality of load blocks, and complete the establishment of the regional street model.

9. A mobile terminal, characterized by According to the intra-district load data, perform cluster processing to form a plurality of load blocks, and complete the establishment of the regional street model.

10. A storage medium, characterized by According to the intra-district load data, perform cluster processing to form a plurality of load blocks, and complete the establishment of the regional street model. According to the intra-district load data, perform cluster processing to form a plurality of load blocks, and complete the establishment of the regional street model. According to the intra-district load data, perform cluster processing to form a plurality of load blocks, and complete the establishment of the regional street model. According to the intra-district load data, perform cluster processing to form a plurality of load blocks, and complete the establishment of the regional street model. According to the intra-district load data, perform cluster processing to form a plurality of load blocks, and complete the establishment of the regional street model. According to the intra-district load data, perform cluster processing to form a plurality of load blocks, and complete the establishment of the regional street model. According to the intra-district load data, perform cluster processing to form a plurality of load blocks, and complete the establishment of the regional street model. According to the intra-district load data, perform cluster processing to form a plurality of load blocks, and complete the establishment of the regional street model. According to the intra-district load data, perform cluster processing to form a plurality of load blocks, and complete the establishment of the regional street model. According to the intra-district load data, perform cluster processing to form a plurality of load blocks, and complete the establishment of the regional street model. According to the intra-district load data, perform cluster processing to form a plurality of load blocks, and complete the establishment of the regional street model. According to the intra-district load data, perform cluster processing to form a plurality of load blocks, and complete the establishment of the regional street model. According to the intra-district load data, perform cluster processing to form a plurality of load blocks, and complete the establishment of the regional street model. According to the intra-district load data, perform cluster processing to form a plurality

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