A method for automatically drawing a distribution network diagram based on 3D visualization

Abstract

The present invention discloses a method for automatically drawing a distribution network diagram based on three-dimensional visualization. This method obtains distribution node information according to the original topological network of the distribution network, and determines the target distribution area and the hierarchical structure relationship of the distribution network; according to the City Information Model and the Geographic Information System, obtains the three-dimensional model diagram and geographical environment information of the target distribution area, and then determines the overhead line area, cable line area and distribution line information in the target distribution area in combination with the distribution line construction specifications. Automatically draw in the three-dimensional model diagram corresponding to the target distribution area according to the hierarchical structure relationship of the distribution network and the distribution line information to obtain a three-dimensional distribution line diagram. The three-dimensional distribution line diagram can reduce the preparatory workload of engineering personnel in the early stage of drawing, provide reference suggestions for engineering personnel to draw a new distribution network diagram; provide a relatively real and reliable functional environment information for line inspection and equipment maintenance personnel, improving work efficiency and work quality.

Description

Technical Field

[0001] The present invention relates to the technical field of distribution networks, and particularly to an automatic drawing method for distribution network diagrams based on three-dimensional visualization. Background Art

[0002] With the rapid development of urban industries and real estate, the electricity demand has been continuously climbing, the scale of the power system has been continuously expanding, and the line planning diagrams of distribution networks have become increasingly complex. At present, most of the distribution network diagrams are manually drawn with the help of drawing software. When the load of the distribution network increases, substations should be appropriately added to the distribution network, and distribution lines should be increased to expand the capacity of the distribution network. And engineers need to do a lot of preparatory work to draw qualified new distribution network diagrams, such as inspecting the actual environmental conditions, selecting the locations of newly built substations, and re-planning the distribution lines, etc. The actual distribution network has numerous nodes, complex structures, and diverse parameters. Relying on manual drawing of the grid connection diagram is labor-intensive and inefficient. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present invention provides an automatic drawing method for distribution network diagrams based on three-dimensional visualization, which can obtain distribution node information and the hierarchical structure relationship of the distribution network from the original topology network of the distribution network, and perform automatic drawing in combination with the three-dimensional model diagram to obtain a three-dimensional distribution line diagram, reducing the preparatory workload of engineers in the early stage of drawing, providing reference suggestions for engineers to draw new distribution network diagrams based on the three-dimensional scene, and improving the drawing efficiency; at the same time, it reduces and provides a relatively real and reliable functional environment information for line inspection and equipment maintenance personnel, improving the work efficiency of inspection and maintenance personnel.

[0004] The automatic drawing method for distribution network diagrams based on three-dimensional visualization according to the first aspect embodiment of the present invention includes:

[0005] Obtain the original topology network of the distribution network;

[0006] Obtain distribution node information according to the original topology network of the distribution network;

[0007] Determine the target distribution area and the hierarchical structure relationship of the distribution network according to the distribution node information;

[0008] Obtain the three-dimensional model diagram and geographical environment information of the target distribution area according to the City Information Model and the Geographic Information System;

[0009] Determine the overhead line area and the cable line area in the target distribution area according to the distribution node information, the geographical environment information, and the distribution line construction specifications;

[0010] Determine the distribution line information in the overhead line area and the cable line area according to the distribution node information and the distribution line construction specifications;

[0011] Perform drawing processing according to the distribution network hierarchical structure relationship, the distribution line information, and the three-dimensional model diagram corresponding to the target distribution area to obtain a three-dimensional distribution line diagram, which is used to provide decision-making suggestions for users.

[0012] The automatic drawing method of the distribution network diagram based on three-dimensional visualization according to the embodiments of the present invention has at least the following beneficial effects:

[0013] It is possible to obtain distribution node information from the original topology network of the distribution network, and then determine the target distribution area and the distribution network hierarchical structure relationship; according to the City Information Model and the Geographic Information System, obtain the three-dimensional model diagram and the geographical environment information of the target distribution area, and then combine the distribution line construction specifications to determine the overhead line area and the cable line area in the target distribution area. Further, determine the distribution line information in the overhead line area and the cable line area according to the distribution line construction specifications. Finally, perform automatic drawing on the three-dimensional model diagram corresponding to the target distribution area according to the distribution network hierarchical structure relationship and the distribution line information to obtain a three-dimensional distribution line diagram.

[0014] Based on the three-dimensional image model, the geographical features of distribution nodes and distribution facilities can be obtained. In the upgrade planning of the distribution network, engineering personnel can intuitively obtain information closely related to geographical elements such as the route, span, poles and towers of the line, the location of the substation, and the terrain through which the line passes from the three-dimensional distribution line diagram, reducing the preparation workload of engineering personnel in the early stage of drawing, and providing reference suggestions for engineering personnel to draw a new distribution network diagram based on the three-dimensional scene. It provides a relatively real and reliable functional environment information for line inspection and equipment maintenance personnel, improving the work efficiency and work quality of inspection and maintenance personnel.

[0015] According to some embodiments of the present invention, the determining the target distribution area and the distribution network hierarchical structure relationship according to the distribution node information includes:

[0016] Obtain the voltage level and geographical location information of the distribution node according to the distribution node information;

[0017] According to the voltage level of the distribution node and the distribution specification information, divide the substation nodes into a high-voltage distribution node set, a medium-voltage distribution node set, and a low-voltage distribution node set;

[0018] Determine the high-voltage distribution area, the medium-voltage distribution area, and the low-voltage distribution area according to the high-voltage distribution node set, the medium-voltage distribution node set, the low-voltage distribution node set, and the geographical location information;

[0019] Determine the target power distribution area according to the high-voltage power distribution area, the medium-voltage power distribution area, and the low-voltage power distribution area;

[0020] Obtain the network hierarchical structure relationship among the high-voltage power distribution area, the medium-voltage power distribution area, and the low-voltage power distribution area within the target power distribution area according to the power distribution node information.

[0021] According to some embodiments of the present invention, the determining the overhead line area and the cable line area within the target power distribution area according to the power distribution node information, the geographical environment information, and the power distribution line construction specifications includes:

[0022] Obtain the building density and load density of the high-voltage power distribution area, the medium-voltage power distribution area, and the low-voltage power distribution area within the target power distribution area according to the geographical environment information;

[0023] Determine the area where the building density is less than the building density threshold and the load density is less than the load density threshold as the overhead line area;

[0024] Determine the area within the target power distribution area other than the overhead line area as the cable line area.

[0025] According to some embodiments of the present invention, the determining the power distribution line information within the overhead line area and the cable line area according to the power distribution node information and the power distribution line construction specifications includes:

[0026] Determine the first node and the last node of the substation within the overhead line area;

[0027] Obtain the topographic and geomorphic parameters within the overhead line area;

[0028] Determine the overhead pole tower site selection information according to the topographic and geomorphic parameters;

[0029] Obtain the overhead line path set according to the overhead pole tower site selection information, the topographic and geomorphic parameters, and the overhead line layout principle;

[0030] Obtain the first load estimation value of each power distribution node within the overhead line area according to the power distribution node information;

[0031] Determine the first power distribution line attribute according to the first load estimation value and the power distribution line construction specifications;

[0032] Obtain the first power distribution line information of the overhead line area according to the overhead line path set and the first power distribution line attribute.

[0033] According to some embodiments of the present invention, obtaining the overhead line path set according to the overhead pole and tower site selection information, the topographic and geomorphic parameters, and the overhead line layout principle includes:

[0034] Marking the first node of the substation and the last node of the substation in the three-dimensional image data corresponding to the overhead line area;

[0035] Obtaining the overhead pole and tower nodes determined by the first node of the substation, the last node of the substation, and the overhead pole and tower site selection information;

[0036] Performing a section test process on the first node of the substation, the last node of the substation, and the overhead pole and tower nodes according to the topographic and geomorphic parameters and the overhead line layout principle to obtain candidate sections;

[0037] Determining a first path set starting from the first node of the substation, a second path set starting from the last node of the substation, and a third path set starting from the overhead pole and tower nodes according to the candidate sections;

[0038] Successively merging and deleting the candidate sections in the first path set, the second path set, and the third path set to obtain the overhead line path set of all routes between the first node of the substation and the last node of the substation.

[0039] According to some embodiments of the present invention, performing a section test process on the first node of the substation, the last node of the substation, and the overhead pole and tower nodes according to the topographic and geomorphic parameters and the overhead line layout principle to obtain candidate sections includes:

[0040] Combining the first node of the substation, the last node of the substation, and the overhead pole and tower nodes into a connection node set;

[0041] Selecting a first connection node according to the connection node set, using the first connection node as a starting point, connecting the first connection node to a second connection node to obtain a test section, and calculating a first distance of the test section, where the second connection node is other nodes in the connection node set except the first connection node;

[0042] Performing three-dimensional collision detection on the test section in the overhead line area according to the overhead line layout principle, and obtaining a first collision path and a first connected path according to the three-dimensional collision detection result;

[0043] Determining a candidate line of the first connection node from the first connected path according to the shortest path principle, the topographic and geomorphic parameters, and the first distance.

[0044] According to some embodiments of the present invention, determining the distribution line information in the overhead line area and the cable line area according to the distribution node information and the distribution line construction specifications further includes:

[0045] Obtaining the topographic and geomorphic parameters in the cable line area;

[0046] Determining the cable inlet position points, cable inlet position points and the second load estimation value in the cable line area according to the topographic and geomorphic parameters and the distribution node information;

[0047] Obtaining the cable line test path according to the cable inlet position points, the cable inlet position points, the topographic and geomorphic parameters and the cable line layout principle;

[0048] Performing three-dimensional collision detection on the cable line test path in the cable line area, and obtaining the second connected path and the second collision path according to the three-dimensional collision detection result;

[0049] Determining the second distribution line information of the cable line area according to the second load estimation value, the distribution line construction specifications and the second connected path.

[0050] According to some embodiments of the present invention, automatically drawing a three-dimensional distribution line diagram on the three-dimensional model diagram corresponding to the target distribution area according to the distribution network hierarchical structure relationship and the distribution line information includes:

[0051] Performing model construction and model connection in the target distribution area according to the distribution line information, and obtaining a three-dimensional model diagram of the overhead line corridor and a three-dimensional model diagram of the cable channel respectively;

[0052] Connecting the three-dimensional model diagram of the overhead line corridor and the three-dimensional model diagram of the cable channel hierarchically according to the distribution network hierarchical structure relationship to obtain a complete three-dimensional distribution line diagram.

[0053] In a second aspect, an embodiment of the present invention further provides a server, including: a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein when the processor executes the computer program, it implements the automatic drawing method of the distribution network diagram based on three-dimensional visualization according to any one of the embodiments in the first aspect.

[0054] In a third aspect, an embodiment of the present invention further provides a computer-readable storage medium storing computer-executable instructions, and the computer can execute the automatic drawing method of the distribution network diagram based on three-dimensional visualization according to any one of the embodiments in the first aspect.

[0055] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. Description of the Drawings

[0056] The above and additional aspects and advantages of the present invention will become apparent and be readily understood in conjunction with the description of the embodiments with reference to the following drawings, in which:

[0057] Figure 1 It is a schematic flow chart of a method for automatically drawing a distribution network diagram based on 3D visualization provided for an embodiment of the present invention;

[0058] Figure 2 It is a schematic flow chart of a method for automatically drawing a distribution network diagram based on 3D visualization according to another embodiment of the present invention;

[0059] Figure 3 It is a schematic flow chart of a method for automatically drawing a distribution network diagram based on 3D visualization according to another embodiment of the present invention;

[0060] Figure 4 It is a schematic flow chart of a method for automatically drawing a distribution network diagram based on 3D visualization according to another embodiment of the present invention;

[0061] Figure 5 It is a server provided for an embodiment of the present invention.

[0062] Reference numerals: Server 40, Processor 41, Memory 42. Detailed Embodiments

[0063] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0064] In the description of the present invention, the meaning of "a number of" is one or more, the meaning of "a plurality of" is two or more, and understandings such as "greater than", "less than", "exceeding", etc. do not include the present number, and understandings such as "above", "below", "within", etc. include the present number. If there is a description of "first", "second", etc., it is only for the purpose of distinguishing technical features and should not be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0065] In the description of the present invention, unless otherwise clearly defined, words such as "set", "connected", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0066] The embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0067] Data construction is required for engineering projects. In the early stage of an engineering project, a spatial database and a model library should be established according to the project requirements. The spatial database is used to manage and maintain the basic geographical data and thematic data within the project scope. The data managed includes: basic geographical data such as high-definition image data and digital elevation models, and various thematic data such as rivers, power lines, traffic roads, nature reserves, and municipal planning passed by the project. The engineering power grid equipment model library has relevant models: general straight tower models for the project, general corner tower models for the project, insulator models, construction equipment models, tower positioning parameters, and substation models, etc. The spatial database and the model library are general, and the description of how to establish the engineering power grid equipment model database will not be elaborated here. Engineering personnel can obtain the required data or models from the spatial database and the model library for model construction, improving work efficiency.

[0068] Refer to Figure 1 , Figure 1 which is a schematic flowchart of a method for automatically drawing a distribution network diagram based on 3D visualization, including the steps:

[0069] Step S100, obtain the original topology network of the distribution network.

[0070] The distribution network includes a power grid equipment layer and a topology relationship layer. Obtaining the original topology diagram of the distribution network is beneficial to quickly obtain the topology information of the distribution network. The original topology network of the distribution network can be obtained from the database storing the distribution network, or can be established by combining real-time images obtained by drones with 3D modeling technology. This application does not specifically limit the method of obtaining the original topology diagram of the distribution network.

[0071] Step S110, obtain distribution node information according to the original topology network of the distribution network.

[0072] Specifically, the distribution node information includes: equipment information, geographical location, two-dimensional coordinates, surrounding environment information, etc. Rich information can be obtained conveniently and quickly through the historical distribution network. It can be understood that the distribution node information can also include: equipment attributes, superior and inferior equipment, connection line attributes, etc.

[0073] Step S120, determine the target distribution area and the hierarchical structure relationship of the distribution network according to the distribution node information.

[0074] Specifically, obtain the voltage level and geographical location information of the distribution nodes according to the distribution node information. Obtaining the voltage level is beneficial for subsequent classification of the distribution nodes, and obtaining the geographical location information is beneficial for determining the scope of each voltage distribution area. Distribution configuration is carried out according to different standards in different distribution areas, improving work efficiency.

[0075] Further, according to the voltage levels and distribution specification information of the distribution nodes, the substation nodes are divided into a high-voltage distribution node set, a medium-voltage distribution node set, and a low-voltage distribution node set. According to the distribution specification information, the distribution nodes with a voltage level of 35 kV or above are divided into high-voltage distribution nodes; the distribution nodes with a voltage level below 380 V are divided into low-voltage distribution nodes; and the distribution nodes not within these two voltage ranges are divided into medium-voltage distribution nodes. It can be understood that the standard for dividing the distribution nodes according to the voltage level is not unique, and the engineering personnel can adjust it according to the actual situation.

[0076] Further, according to the high-voltage distribution node set, the medium-voltage distribution node set, the low-voltage distribution node set, and the geographical location information, the high-voltage distribution area, the medium-voltage distribution area, and the low-voltage distribution area are determined. The low-voltage distribution grid generally uses a voltage of 220 / 380 V for power supply to users. The medium-voltage distribution grid generally uses a voltage of 10 kV and only has a distribution function. The medium-voltage cable directly supplies power to the grid substation serving as the power source of the low-voltage grid or directly to the user substation. The high-voltage distribution grid generally uses a voltage of 110 kV.

[0077] Further, according to the high-voltage distribution area, the medium-voltage distribution area, and the low-voltage distribution area, the target distribution area is determined. Power grids with different voltage levels have different construction requirements, and different voltage levels of the power grid will also affect the cable type selection, cable laying method, etc. Obtaining a target distribution area with clear area division is beneficial for engineering personnel to selectively inspect, maintain a certain distribution area, or redraw the distribution lines in this area for re-planning.

[0078] Further, according to the distribution node information, the network hierarchical structure relationship among the high-voltage distribution area, the medium-voltage distribution area, and the low-voltage distribution area within the target distribution area is obtained. The distribution network is composed of a high-voltage distribution network, a medium-voltage distribution network, and a low-voltage distribution network, and there is a certain network hierarchical structure relationship among the three. For example: the supply relationship between the medium-voltage distribution area and the low-voltage distribution network, the supply relationship between the high-voltage distribution area and the low-voltage distribution network, etc. Hierarchical division of the sub-networks in the distribution network according to the voltage level is beneficial for engineering personnel to more conveniently and quickly master the distribution situation in this area, reduce the workload of on-site inspection and engineering drawing preparation, and improve work efficiency.

[0079] Step S130, according to the City Information Model and the Geographic Information System, obtain the three-dimensional model diagram and geographical environment information of the target distribution area.

[0080] The applications of the City Information Model and the Geographic Information System are relatively mature, and it is more convenient and fast to obtain the three-dimensional model diagram and geographical environment information of the target distribution area based on this.

[0081] Step S140: Determine the overhead line area and the cable line area in the target distribution area according to the distribution node information, geographical environment information, and distribution line construction specifications.

[0082] Specifically, obtain the building density and load density of the high-voltage distribution area, medium-voltage distribution area, and low-voltage distribution area in the target distribution area according to the geographical environment information. It can be understood that the geographical environment information includes: building density, load density, two-dimensional coordinates of distribution nodes, etc. In this application, the building density and load density are used as the conditions for selecting the power grid erection method. It can be understood that the building density and load density are only relatively important area division conditions. In practice, the area division conditions affecting the selection of the power grid erection method also include: power grid capacity ratio, power grid capacity, and maximum load of the power grid, etc. Dividing the target distribution area according to the geographical environment information is conducive to providing reliable suggestions for engineering personnel to select different construction methods for different areas.

[0083] Furthermore, according to the building density threshold and the load density threshold, determine the area where the building density is less than the building density threshold and the load density is less than the load density threshold as the overhead line area.

[0084] According to the distribution network construction specification information, the overhead line area should avoid the current development area, public recreation land, areas where the environment is easily damaged, or areas that seriously affect the landscape as much as possible. Overhead construction is used in some relatively open areas with low building density.

[0085] Furthermore, determine the area other than the overhead line area in the target distribution area as the cable line area.

[0086] In actual construction, the cable has strong design power supply capacity, is safe and stable, but has a higher cost; it is generally used in cities or industrial areas with dense buildings and large load densities, coastal areas vulnerable to typhoon attacks, economic development zones with high requirements for power supply reliability, and some scenic tourist areas.

[0087] Overhead lines and cable lines are two different power grid erection methods, and there are also significant differences in the construction standards. Dividing the target distribution area according to different power grid erection methods is conducive to engineering personnel making advance estimates of the areas that need to be constructed or inspected during actual construction or inspection, and facilitating the subsequent on-site work.

[0088] Step S150: Determine the distribution line information in the overhead line area and the cable line area according to the distribution node information and the distribution line construction specifications.

[0089] It can be understood that the distribution line information includes the first distribution line information in the overhead line area and the second distribution line information in the cable line area. According to the distribution line information, the efficiency of automatic drawing can be improved. Engineering personnel can obtain the distribution line information of different regions, and then re-plan the distribution network or perform manual drawing with reference to the distribution line information, thereby improving work efficiency.

[0090] Step S160: Perform automatic drawing based on the distribution network hierarchy relationship, distribution line information, and the three-dimensional model diagram corresponding to the target distribution area to obtain a three-dimensional distribution line diagram, which is used to provide decision-making suggestions for users.

[0091] Specifically, according to the distribution line information, model construction and model connection are carried out in the target distribution area to obtain the three-dimensional model diagram of the overhead line corridor and the three-dimensional model diagram of the cable channel respectively. According to the distribution line information, substation models, pole models, conductor models, etc. are selected from the power grid equipment model library. It should be noted that the distribution line information includes the first distribution line information and the second distribution line information. According to the first distribution line information, model construction and model connection are carried out in the overhead line area to obtain the three-dimensional model diagram of the overhead line corridor; according to the second distribution line information, model construction and model connection are carried out in the cable line area to obtain the three-dimensional model diagram of the cable channel.

[0092] Furthermore, according to the distribution network hierarchy relationship, the three-dimensional model diagram of the overhead line corridor and the three-dimensional model diagram of the cable channel are hierarchically connected to obtain a complete three-dimensional distribution line diagram.

[0093] Engineering personnel can intuitively obtain information such as the line orientation, span, poles, the location of the substation, and the terrain passed by the line through the three-dimensional distribution line diagram, reducing the preparatory workload in the early stage of drawing for engineering personnel, providing reference suggestions for engineering personnel to draw a new distribution network diagram based on the three-dimensional scene, reducing the preparatory workload in the early stage, and improving the drawing work efficiency. It provides a relatively real and reliable functional environment information for engineering personnel, improving the work efficiency and work quality of inspection and maintenance.

[0094] Refer to Figure 2 , Figure 2 which is a schematic flowchart of the automated drawing method for a distribution network diagram based on three-dimensional visualization according to another embodiment of the present invention, and is a detailed flowchart of step S150, including:

[0095] Step S200: Determine the head node and end node of the distribution substation in the overhead line area.

[0096] Step S210: Obtain the topographic and geomorphic parameters in the overhead line area.

[0097] Step S220: Determine the overhead pole site selection information according to the topographic and geomorphic parameters.

[0098] Specifically, according to the siting specifications of overhead poles and towers, the topographic and geomorphic parameters for providing reference for the siting of overhead poles and towers include: slope parameters, hydrogeological parameters, building distribution parameters, and traffic road distribution parameters. Overhead poles and towers should be constructed in areas with relatively gentle terrain, convenient transportation, relatively scattered building distributions, and far from areas prone to frequent natural disasters such as floods, landslides, and earthquakes. In addition, the siting of overhead poles and towers should consider the development plan of the power system within the overhead line area, and comprehensively consider factors such as network structure, load distribution, urban construction planning, transportation, and environmental impact for siting.

[0099] It should be noted that the topographic and geomorphic parameters are not limited to the parameters mentioned in this application. The topographic and geomorphic parameters can also include: slope aspect, slope change rate, catchment area, etc. Different topographic and geomorphic parameters can be selected according to specific engineering construction requirements for siting overhead poles and towers.

[0100] Step S230, obtain the overhead line path set according to the overhead pole and tower siting information, topographic and geomorphic parameters, and overhead line layout principles.

[0101] Specifically, mark the first node of the substation and the last node of the substation in the three-dimensional image data corresponding to the overhead line area;

[0102] Furthermore, obtain the overhead pole and tower nodes determined by the first node of the substation, the last node of the substation, and the overhead pole and tower siting information;

[0103] Furthermore, according to the topographic and geomorphic parameters and the overhead line layout principles, perform section test processing on the first node of the substation, the last node of the substation, and the overhead pole and tower nodes to obtain candidate sections;

[0104] Furthermore, according to the candidate sections, determine the first path set starting from the first node of the substation, the second path set starting from the last node of the substation, and the third path set starting from the overhead pole and tower nodes;

[0105] Furthermore, sequentially merge and delete the candidate sections in the first path set, the second path set, and the third path set to obtain the overhead line path set of all routes between the first node of the substation and the last node of the substation. Before merging, first compare the candidate sections in the first path set, the second path set, and the third path set. When the first high tower node and the second high tower node of two candidate sections are the same and the candidate section appears repeatedly, then delete the candidate section from the second path set and the third path set.

[0106] Overhead lines are erected along mountains, canals, green belts and roads according to the urban terrain, geomorphic features and the requirements of urban road planning. The path selection should be short and straight, reducing intersections with water channels, roads and railways. Engineering personnel can select a distribution node from the overhead line path set and view the overhead line path of this distribution node. This is convenient for providing information to engineering personnel in practice and conducting appropriate inspection and maintenance for this distribution node.

[0107] Step S240: Obtain the first load estimation values of each distribution node within the overhead line area according to the distribution node information.

[0108] Specifically, determine the power supply scope of the first distribution node according to the original topology map of the distribution network, and query the load density within this power supply scope in the geographic information system. This load density is the load estimation value of the first distribution node. Perform the same operation on the nodes other than the first distribution node, and the load estimation values of each distribution node can be obtained. Using the load density estimation method to obtain the load estimation value is relatively rough, but it is more convenient and fast to implement. According to the obtained load estimation values of the distribution nodes, it can provide reference information for engineering personnel when adding new nodes for re-planning in the distribution network, and also provide reference standards for equipment selection and line selection of the distribution nodes.

[0109] It can be understood that there are various load estimation methods, such as: transformer capacity reduction method, load curve reduction method, etc. Therefore, this application does not specifically limit the method for obtaining the load estimation values of each distribution node.

[0110] Step S250: Determine the first distribution line attributes according to the first load estimation values and the distribution line construction specifications.

[0111] It can be understood that the first distribution line attributes include: the type, length, cross-sectional area, wind resistance performance and guy wire design parameters of the conductor, etc.

[0112] Step S260: Obtain the first distribution line information of the overhead line area according to the overhead line path set and the first distribution line attributes.

[0113] In the overhead line area, bare conductors are generally selected for the conductors. Insulated conductors can be selected for areas such as forest areas and towns. According to the load estimate value, estimate the line transportation capacity, determine the conductor cross-section according to the current-carrying capacity, and determine the conductor type according to the topographic and geomorphic parameters and meteorological conditions. In addition, according to the distribution line construction specifications, the appropriate tower type should be selected according to the meteorological conditions and conductor type in the overhead line area. The historical meteorological conditions in the overhead line area can be obtained from the local meteorological bureau. Specifically, the first distribution line information in the overhead line area also includes: the overhead line path set, the first distribution line attributes, the geographical location of the overhead towers, the tower type, etc. The first distribution line information obtained after referring to the actual distribution line construction specification information has higher reference value and feasibility.

[0114] Refer to Figure 3 Make a further explanation on the following mentioned in step S230: According to the topographic and geomorphic parameters and the overhead line layout principle, perform road section test processing on the substation first node, the substation last node, and the overhead tower node to obtain candidate road sections. Figure 3 It is a schematic flowchart of a method for automatically drawing a distribution network diagram based on three-dimensional visualization according to another embodiment of the present invention, including:

[0115] Step S300, aggregate the substation first node, the substation last node, and the overhead tower node into a connection node set.

[0116] Step S310, select a first connection node according to the connection node set, use the first connection node as the starting point, connect the first connection node with a second connection node to obtain a test road section, and calculate the first distance of the test road section. The second connection node is other nodes in the connection node set except the first connection node.

[0117] Traverse the connection node set to obtain test road sections for each connection node.

[0118] Step S320, perform three-dimensional collision detection on the test road section in the overhead line area according to the overhead line layout principle, and obtain a first collision path and a first connected path according to the three-dimensional collision detection result.

[0119] Specifically, import the three-dimensional image of the overhead line area into CAD, and perform three-dimensional collision detection on the test road section in CAD. In this application, the graphical method is adopted, using the projection dimensionality reduction technology to reduce the high dimension to a low dimension, and then perform interference testing on the graph of the projection plane. Using a quaternion method, a vector (x, y, z) and a scalar (θ) are unified in a formula, and by solving a quaternion equation, it is judged whether a collision and interference occur.

[0120] It should be noted that in addition to the graphical method adopted in this application for the three-dimensional collision detection algorithm, a dynamic interference detection method can also be used, that is, during the process of connecting lines in CAD, dynamic detection is performed on whether the test section collides with models such as rivers and buildings. The collision detection algorithm also includes: spatial decomposition method, hierarchical volume containment method, 3D clipping algorithm, etc. This application does not make specific limitations on the algorithms used in three-dimensional collision detection, as long as it can perform collision detection on the test section and obtain the first collision path and the first connected path.

[0121] According to the layout principle of overhead lines, overhead lines should be based on the urban terrain, geomorphic features and urban road planning requirements. The path selection should be short and straight, and should be erected along mountains, river channels, green belts and roads to reduce intersections with rivers, roads and railways. Conducting three-dimensional collision detection is beneficial to distinguish the collision path and the connected path from the test section, obtain candidate sections that meet the requirements of actual distribution line construction, and have reference value. The selection of appropriate sections can also minimize the impact of distribution line construction on existing buildings, provide effective and feasible recommended distribution line paths for engineering personnel, and improve the work efficiency of engineering personnel.

[0122] Step S330, determine the candidate line of the first connection node from the first connected path according to the shortest path principle, topographic and geomorphic parameters and the first distance.

[0123] Specifically, obtain the first distance of each connected path, and select the first connected path with the shortest first distance as the candidate section of the first connection node. The length of the candidate line is shorter, which can save construction costs. And when a line fault occurs, the short line is conducive to engineering personnel quickly locating the fault and improving work efficiency.

[0124] Refer to Figure 4 , Figure 4 is a schematic flow chart of the automatic drawing method of the distribution network map based on three-dimensional visualization according to another embodiment of the present invention, and is also another detailed flow chart of step S150, including:

[0125] Step S400, obtain the topographic and geomorphic parameters within the cable line area.

[0126] Specifically, the topographic and geomorphic parameters obtained within the cable line area: slope parameter, hydrogeological parameter, building distribution parameter, traffic road distribution parameter, municipal construction distribution parameter, etc.

[0127] Step S410, obtain the cable line test path according to the cable inlet position point, cable inlet position point, topographic and geomorphic parameters and the cable line layout principle.

[0128] Specifically, in accordance with the cable line layout principles and construction standard habits, generally, the power cable channels are arranged along the sidewalks or green belts on the east and south sides of the roads. In the urban center areas with high load density and concentrated cables, cable tunnels are adopted. Concealed cable ducts shall be set at the main and secondary urban roads and concentrated outgoing lines. The cable inlet position points and cable inlet position points are determined according to the topographic and geomorphic parameters and the cable line layout principles. It can be understood that the number of cable inlet position points and cable inlet position points is multiple.

[0129] Select the first cable inlet position point from multiple cable inlet position points. Taking the first cable inlet position point as the starting point and the cable inlet position point as the ending point, connect to obtain all cable line test paths starting from the first cable inlet position point. Traverse the cable inlet position points to obtain the cable line test paths starting from each cable inlet position point.

[0130] Step S420: Perform three-dimensional collision detection on the cable line test paths within the cable line area, and obtain the second connected path and the second collision path according to the three-dimensional collision detection results.

[0131] There shall be no municipal facilities such as any pipes, networks, subways, etc. underground at the positions passed by the cable channels. Therefore, three-dimensional collision detection also needs to be performed on the cable line test paths. The three-dimensional collision detection method adopted in this step is the same as the three-dimensional collision detection method used in step S320, and the second connected path and the second collision path are also obtained from the cable line test paths.

[0132] Step S430: Determine the cable inlet position points, cable inlet position points and the second load estimation value in the cable line area according to the topographic and geomorphic parameters and the distribution node information.

[0133] The method for obtaining the second load estimation value is the same as the method for obtaining the first load estimation value in step S240, and will not be elaborated here.

[0134] Step S440: Determine the second distribution line information in the cable line area according to the second load estimation value, the distribution line construction specifications and the second connected path.

[0135] Specifically, select the cable line candidate paths that meet the distribution line construction specifications and have the shortest route length from the second connected path, and then obtain the cable line path set.

[0136] Determine the cable line attributes according to the second load estimation value and the distribution line construction specifications. The cable line attributes include: cable model, length, quantity, guy wire design parameters, and so on. Determine the second distribution line information within the cable line area according to the cable line attributes and the cable line path set. It can be understood that the second distribution line information should also include: cable inlet and outlet position information, cable laying method, and so on. The second distribution line information provides relatively reliable distribution suggestions for engineering personnel, improving the work efficiency and quality of engineering personnel.

[0137] Reference Figure 5 , a server 40 provided by an embodiment of the second aspect of the present invention. The server 40 includes, but is not limited to: a memory 42 for storing programs; a processor 41 for executing the programs stored in the memory 42. The processor 41 and the memory 42 can be connected through a bus or other means.

[0138] As a non-transitory computer-readable storage medium, the memory 42 can be used to store non-transitory software programs and non-transitory computer-executable programs. The processor 41 realizes the above-mentioned automatic drawing method of the distribution network diagram based on three-dimensional visualization by running the non-transitory software programs and instructions stored in the memory 42.

[0139] The memory 42 can include a program storage area and a data storage area. Among them, the program storage area can store an operating system and application programs required for at least one function; the data storage area can store the above-mentioned automatic drawing method of the distribution network based on the recommendation algorithm. In addition, the memory 42 can include a high-speed random access memory, and can also include a non-transitory memory, such as at least one disk storage device, a flash memory device, or other non-transitory solid-state storage devices. In some embodiments, the memory 42 optionally includes a memory remotely set relative to the processor 41, and these remote memories can be connected to the processor 41 through a network.

[0140] The non-transitory software programs and instructions required to implement the above-mentioned automatic drawing method of the distribution network based on the recommendation algorithm are stored in the memory 42. When executed by one or more processors 41, the above-mentioned automatic drawing method of the distribution network based on the recommendation algorithm is executed. For example, execute Figure 1 the method steps S100 to S160 described in Figure 2 the method steps S200 to S260 described in Figure 3 the method steps S300 to S330 described in Figure 4 the method steps S400 to S440 described in

[0141] In addition, an embodiment of the present invention further provides a computer-readable storage medium, which stores computer-executable instructions, and the computer-executable instructions are executed by one or more control processors. The above one or more control processors execute the automatic drawing method of the distribution network based on the recommendation algorithm in the above method embodiment. For example, execute the Figure 1 method steps S100 to S160 described in Figure 2 method steps S200 to S260 described in Figure 3 method steps S300 to S330 described in Figure 4 method steps S400 to S440 described in

[0142] Those of ordinary skill in the art can understand that all or some of the steps in the methods disclosed above can be implemented as software, firmware, hardware, and their appropriate combinations. Some physical components or all physical components can be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or can be implemented as hardware, or can be implemented as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which can include a computer storage medium and a communication medium. The computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information. The computer storage medium includes, but is not limited to, RAM, ROM, EEPROM, CD-ROM, or any other medium that can be used to store the desired information and can be accessed by a computer. In addition, the communication medium generally contains computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transmission mechanism, and can include any information delivery medium.

[0143] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the knowledge scope of those of ordinary skill in the art, various changes can be made without departing from the purpose of the present invention.

Claims

1. A method for automatically drawing a distribution network diagram based on 3D visualization, characterized in that, it includes: Obtain the original topology network of the distribution network; Obtain distribution node information based on the original topology network of the distribution network; Determine the target distribution area and the hierarchical structure relationship of the distribution network according to the distribution node information; Obtain the 3D model diagram and geographical environment information of the target distribution area according to the City Information Model and Geographic Information System; Determine the overhead line area and cable line area in the target distribution area according to the distribution node information, the geographical environment information and the distribution line construction specifications; Determine distribution line information in the overhead line area and the cable line area according to the distribution node information and the distribution line construction specifications; Perform drawing processing according to the hierarchical structure relationship of the distribution network, the distribution line information and the 3D model diagram corresponding to the target distribution area to obtain a 3D distribution line diagram, and the 3D distribution line diagram is used to provide decision-making suggestions for users; Among them, the determining the distribution line information in the overhead line area and the cable line area according to the distribution node information and the distribution line construction specifications includes: Determine the first node and the last node of the substation in the overhead line area; Obtain the topographic and geomorphic parameters in the overhead line area; Determine the overhead tower site selection information according to the topographic and geomorphic parameters; Obtain a set of overhead line paths according to the overhead tower site selection information, the topographic and geomorphic parameters and the overhead line layout principle; Obtain the first load estimation value of each distribution node in the overhead line area according to the distribution node information; Determine the first distribution line attributes according to the first load estimation value and the distribution line construction specifications; Obtain the first distribution line information of the overhead line area according to the set of overhead line paths and the first distribution line attributes.

2. The method for automatically drawing a distribution network diagram based on 3D visualization according to claim 1, characterized in that, the determining the target distribution area and the hierarchical structure relationship of the distribution network according to the distribution node information includes: Obtain the voltage level and geographical location information of the distribution node according to the distribution node information; Divide the substation nodes into a high-voltage distribution node set, a medium-voltage distribution node set and a low-voltage distribution node set according to the voltage level of the distribution node and the distribution specification information; Determine the high-voltage distribution area, the medium-voltage distribution area and the low-voltage distribution area according to the high-voltage distribution node set, the medium-voltage distribution node set, the low-voltage distribution node set and the geographical location information; Determine the target distribution area according to the high-voltage distribution area, the medium-voltage distribution area and the low-voltage distribution area; Obtain the network hierarchical structure relationship among the high-voltage distribution area, the medium-voltage distribution area and the low-voltage distribution area in the target distribution area according to the distribution node information.

3. The method for automatically drawing a distribution network diagram based on 3D visualization according to claim 2, characterized in that, Determining the overhead line area and the cable line area in the target distribution area according to the distribution node information, the geographical environment information, and the distribution line construction specifications includes: Obtaining the building density and the load density of the high-voltage distribution area, the medium-voltage distribution area, and the low-voltage distribution area in the target distribution area according to the geographical environment information; Determining the area where the building density is less than the building density threshold and the load density is less than the load density threshold as the overhead line area; Determining the area in the target distribution area except the overhead line area as the cable line area.

4. The method for automatically drawing a distribution network diagram based on three-dimensional visualization according to claim 1, characterized in that Obtaining the overhead line path set according to the overhead pole tower site selection information, the topographic and geomorphic parameters, and the overhead line layout principle includes: Marking the first node and the last node of the substation in the three-dimensional image data corresponding to the overhead line area; Obtaining the overhead pole tower nodes determined by the first node of the substation, the last node of the substation, and the overhead pole tower site selection information; Performing a section test process on the first node of the substation, the last node of the substation, and the overhead pole tower nodes according to the topographic and geomorphic parameters and the overhead line layout principle to obtain candidate sections; Determining a first path set starting from the first node of the substation, a second path set starting from the last node of the substation, and a third path set starting from the overhead pole tower nodes according to the candidate sections; Successively merging and deleting the candidate sections in the first path set, the second path set, and the third path set to obtain the overhead line path set of all routes between the first node and the last node of the substation.

5. The method for automatically drawing a distribution network diagram based on three-dimensional visualization according to claim 4, characterized in that Performing a section test process on the first node of the substation, the last node of the substation, and the overhead pole tower nodes according to the topographic and geomorphic parameters and the overhead line layout principle to obtain candidate sections, including: Combining the first node of the substation, the last node of the substation, and the overhead pole tower nodes into a connection node set; Selecting a first connection node according to the connection node set, using the first connection node as a starting point, connecting the first connection node to a second connection node to obtain a test section, and calculating a first distance of the test section, where the second connection node is other nodes in the connection node set except the first connection node; Performing three-dimensional collision detection on the test section in the overhead line area according to the overhead line layout principle, and obtaining a first collision path and a first connected path according to the three-dimensional collision detection result; Determining the candidate line of the first connection node from the first connected path according to the shortest path principle, the topographic and geomorphic parameters, and the first distance.

6. The method for automatically drawing a distribution network diagram based on three-dimensional visualization according to claim 1, characterized in that Determining the distribution line information in the overhead line area and the cable line area according to the distribution node information and the distribution line construction specifications further includes: Obtaining the topographic and geomorphic parameters in the cable line area; Determining the cable inlet position points, cable inlet position points and the second load estimation value in the cable line area according to the topographic and geomorphic parameters and the distribution node information; Obtaining the cable line test path according to the cable inlet position points, the cable inlet position points, the topographic and geomorphic parameters and the cable line layout principle; Performing three-dimensional collision detection on the cable line test path in the cable line area, and obtaining the second connected path and the second collision path according to the three-dimensional collision detection result; Determining the second distribution line information in the cable line area according to the second load estimation value, the distribution line construction specifications and the second connected path.

7. The automatic drawing method of the distribution network diagram based on three-dimensional visualization according to claim 1, characterized in that, Automatically drawing on the three-dimensional model diagram corresponding to the target distribution area according to the distribution network hierarchical structure relationship and the distribution line information to obtain a three-dimensional distribution line diagram, including: Performing model construction and model connection in the target distribution area according to the distribution line information to obtain an overhead line corridor three-dimensional model diagram and a cable channel three-dimensional model diagram respectively; According to the distribution network hierarchical structure relationship, hierarchically connecting the overhead line corridor three-dimensional model diagram and the cable channel three-dimensional model diagram to obtain a complete three-dimensional distribution line diagram.

8. A server, including: A memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that when the processor executes the computer program, it implements the automatic drawing method of the distribution network diagram based on three-dimensional visualization according to any one of claims 1 to 7.

9. A computer-readable storage medium stores computer-executable instructions, and the computer can execute the automatic drawing method of the distribution network diagram based on three-dimensional visualization according to any one of claims 1 to 7.

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