CN115841547A - Method for constructing digital twin scene of power line - Google Patents
Method for constructing digital twin scene of power line Download PDFInfo
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Abstract
The invention discloses a method for constructing a digital twin scene of a power line, which comprises the following steps: constructing a refined three-dimensional tower model, wherein the refined three-dimensional tower model comprises model codes and tower attributes, and the tower attributes comprise tower hanging points; constructing line information, wherein the line information comprises a pole tower code and a pole tower coordinate; matching the model code and the tower code, placing the matched refined three-dimensional tower model on a space position corresponding to a tower in a scene, and then confirming a tower hanging point of the tower attribute associated with the refined three-dimensional tower model; matching the hanging point corresponding relation between the towers by using a topological rule based on the confirmed tower hanging points and tower coordinates to obtain alignment hanging points; and acquiring the space position coordinates of the alignment hanging points, generating a loop catenary by using a catenary equation and the alignment hanging points, and splicing the loop catenary and the tower to form a three-dimensional scene. The method can reduce the difficulty of constructing the three-dimensional scene of the power line and improve the design efficiency.
Description
Technical Field
The invention relates to the field of mountain road reconstruction engineering, in particular to a method for constructing a digital twin scene of a power line.
Background
In recent years, each electric power company in China has made great progress and results in the aspect of 'building a strong power grid', but an efficient and comprehensive mode is still lacked in the aspects of showing, analyzing and publicizing the results, for example, for a new power transmission line pole, the knowledge of the visual information can be realized only on site or by watching the video data on the site at present.
At present, the three-dimensional model of the electric transmission line pole in China mostly depends on professional modeling personnel to refer to corresponding design parameters, is manually created by CAD software, has large workload, wastes time and labor, and is difficult to meet the requirement of rapid digital construction of an electric transmission line corridor.
Therefore, the invention provides a method for constructing a digital twin scene of a power line, which meets the requirement of rapid and high-precision three-dimensional reconstruction of a power transmission pole by a modeling worker.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a method for constructing a digital twin scene of a power line, which can reduce the difficulty of constructing a three-dimensional scene of the power line, improve the design efficiency and meet the engineering application requirement of rapid digital construction of a power line corridor.
In order to solve the technical problems, the invention is realized by the following technical scheme:
a method for constructing a digital twin scene of a power line comprises the following steps:
constructing a refined three-dimensional tower model, wherein the refined three-dimensional tower model comprises model codes and tower attributes, and the tower attributes comprise tower hanging points;
constructing line information, wherein the line information comprises a tower code and a tower coordinate;
matching the model code with the tower code, placing a matched refined three-dimensional tower model at a spatial position corresponding to a tower in a scene, and then confirming a tower hanging point of a tower attribute associated with the refined three-dimensional tower model;
matching the hanging point corresponding relation between the towers by using a topological rule based on the confirmed tower hanging points and the tower coordinates to obtain alignment hanging points;
and acquiring the space position coordinates of the alignment hanging points, generating a loop catenary by using a catenary equation and the alignment hanging points, and splicing the loop catenary and the tower to form a three-dimensional scene.
Preferably, the topology rule is: dividing the tower into a terminal pole, a tension pole and a corner pole in the line, virtualizing a line on the left hand side of the advancing direction of the line as a reference line, calculating the distance between a hanging point and the virtual line, sequencing the distance, and taking the hanging points with the same sequencing of two adjacent poles as alignment hanging points which are correct matching hanging points for connecting return lines.
Preferably, the spatial position coordinate calculation of the alignment hanging point is performed by using the spatial position of the tower model and the relative coordinate in the attribute information of the hanging point.
Preferably, the refined three-dimensional tower model is constructed based on a standard typical design library, the tower is firstly divided into two components, namely a rod and a rod head, and the models are respectively constructed by taking a meter as a unit for assembly.
Preferably, model processing is required in the construction process of the refined three-dimensional tower model, and the model processing comprises lightweight processing of model data, so that the number of vertexes of the tower model is reduced, and conditions are provided for batch placement of towers in a scene.
Preferably, the attributes of the tower hanging point include a hanging point number and a hanging point coordinate, and the hanging point coordinate is an offset value relative to the bottom center of the tower.
Preferably, there are four different modes of tower: the terminal rod, the tension rod, the corner rod and the branch rod are arranged on the frame; only one end of the terminal rod is provided with a hanging point; hanging points are arranged at two ends of the tension rod in the horizontal direction; the side of the transfer rod formed by a certain included angle is provided with a hanging point; the branch rod is divided into three directions with hanging points; and calculating a catenary equation according to the positions of the matched hanging points determined at the two ends of the rod.
Compared with the prior art, the invention has the following advantages and beneficial effects:
according to the method, a digital twin scene of the power line is automatically constructed from the planar line design information by utilizing the line topology rule information, the tower refinement model, the design information, the catenary formula and the like. The invention can support technical personnel to complete the construction work of a three-dimensional fine scene of the line on the basis of only mastering the knowledge of the design of the planar line, thereby greatly reducing the resistance of three-dimensional propulsion. The invention reduces the difficulty of constructing the three-dimensional scene of the power line, improves the design efficiency and meets the engineering application requirement of the rapid digital construction of the power line corridor.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention;
FIG. 2 is a schematic diagram of the scenario generation logic of the present invention;
FIG. 3 is a schematic view of the topological connection of the present invention;
FIG. 4 is a schematic diagram of the shortest distance connection of the present invention.
Reference numerals: 001-terminal bar; 002-tension-resistant rod; 003-corner bar; 004-distance from the hanging point to the virtual line; 005-correct matching hanging point connecting line.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present invention, the following description of the preferred embodiments of the present invention is provided in conjunction with specific examples, but it should be understood that the drawings are for illustrative purposes only and should not be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that some of the power line digital twin scene construction methods known in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and should not be construed as limiting the present patent.
The invention will be further described in detail with reference to the following drawings and specific examples, which are not intended to limit the invention, but are for clear understanding.
The invention provides a method for constructing a digital twin scene of a power line, which comprises the steps of model processing and management, scene dynamic generation and storage; model processing and management comprises model preprocessing and model-specific management; the model is preprocessed, so that lightweight processing is carried out on refined distribution network typical components and pole models, and the load of scene loading is reduced; after the model is processed, importing a platform and associating attribute information to provide a basis for dynamic construction of a scene; the dynamic generation and saving of the scene comprises the dynamic generation of a three-dimensional scene of the power line and the saving of the scene in a system; the dynamic generation of the three-dimensional scene of the power line utilizes the design information of the line and combines the information of the model to generate the three-dimensional scene by utilizing a topological rule; the scene storage is to store the dynamically generated three-dimensional scene; and when the design information of the power line is changed, replacing the stored three-dimensional scene after updating the scene.
The model processing is to carry out lightweight processing on the model data, reduce the number of vertexes of the tower model and provide conditions for batch placement of the towers in a scene; the management of the model is to associate the attribute of the tower model and the position information of hanging points; the hanging point position information refers to the position of a connecting point which can be connected with an electric wire on the tower; the coordinate of the position is represented by a user-defined coordinate system, the center of a cylinder at the bottom of a tower is taken as an original point, the east direction perpendicular to the cross arm is taken as an X axis, and the north direction parallel to the cross arm is taken as a Y axis.
The dynamic generation of the scene comprises loading of line design information, spatial placement of a tower model, construction of topological relation of a return line, generation of a return line by a catenary and connection of the tower line and the catenary to form the scene; loading line design information, and acquiring coordinate information of a tower in a geographic space, the direction of a line and a connection point; and designing the position of the pole in a three-dimensional geographic space scene by using the acquired line information, and placing a refined pole tower model according to the selected model. As shown in fig. 3, in the line, the tower is basically divided into a terminal pole 1, a tension pole 2 (a straight pole) and a corner pole 3, a return line topological relation is constructed by virtualizing a line which has the same direction as the line at a position of 10m on the left side (the left direction shown in the figure) of the line, calculating the distance from each pole hanging point to the virtual line, and sorting the hanging points according to the distance, wherein the hanging points are aligned if two adjacent pole hanging points are in the same order (that is, the pole hanging points corresponding to the distance 1 in fig. 3 are in the same group of orders, the pole hanging points corresponding to the distance 2 are in the same group of orders, and the pole hanging points corresponding to the distance 3 are in the same group of orders), and loop wires are required for connection; calculating the space coordinate of the alignment hanging point by adopting the space position of the tower model and the relative coordinate in the attribute information of the hanging point to obtain the space position coordinate of the hanging point; generating a loop catenary by using a catenary equation formula and an alignment hanging point; and splicing the loop catenary and the tower to form a scene.
The scene is stored in the system, and has two layers of meanings; the first layer is stored after the platform generates a scene for the first time; the second layer is that after the line design information is updated, the old scene is replaced after the whole scene is regenerated, and the new scene is adopted for storage.
As shown in fig. 1-2, are logical representations of a system diagram to further illustrate the logical processes of the construction method of the present invention. The initial information utilized by the method comprises a tower model, tower attributes and line information, model codes contained in the tower model are matched with tower codes contained in tower point positions in the line information, and the matched tower model is placed at a spatial position corresponding to a tower in a scene. And generating a scene line by using a line topology rule and a catenary equation through a tower hanging point in the tower attribute and a tower coordinate in the line information, synthesizing the scene rod and the scene line, and generating a final digital twin scene by combining the ground information.
As shown in fig. 4, the reason for adopting the topological connection is explained, and the connection of the hanging point is a simple problem under the intuitive judgment, but the spatial rotation and the spatio-temporal intersection related to the tower model cannot be simply connected according to the number of the hanging point. In fig. 4, the distance 1 is obviously smaller than the distance 2, but the correct connection mode is the connection marked by the distance 2, so that the judgment by adopting the shortest distance without adding a topological rule can cause the wrong matching of the hanging points, and the method is not feasible.
The method for constructing the digital twin scene of the power line provided by the invention meets the requirement of quick and high-precision three-dimensional reconstruction of a power transmission pole by a modeling worker. The existing three-dimensional models of different types of power transmission poles are decomposed, a full-element component model library of the power transmission poles is established, and different components in the model library can be automatically spliced according to fixed connection relations. On the basis of the construction of the tower model, a refined three-dimensional scene is automatically constructed by utilizing the line information.
The foregoing is merely a preferred embodiment of the present invention, but the present invention is not limited to the specific embodiments described above. Those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for modifying, supplementing or modifying other structures for carrying out the same purposes of the present invention.
Claims (7)
1. A method for constructing a digital twin scene of a power line is characterized by comprising the following steps:
constructing a refined three-dimensional tower model, wherein the refined three-dimensional tower model comprises model codes and tower attributes, and the tower attributes comprise tower hanging points;
constructing line information, wherein the line information comprises a tower code and a tower coordinate;
matching the model code with the tower code, placing a matched refined three-dimensional tower model on a spatial position corresponding to a tower in a scene, and then confirming a tower hanging point of a tower attribute associated with the refined three-dimensional tower model;
matching the hanging point corresponding relation between the towers by using a topological rule based on the confirmed tower hanging points and the tower coordinates to obtain alignment hanging points;
and acquiring the space position coordinates of the alignment hanging points, generating a loop catenary by using a catenary equation and the alignment hanging points, and splicing the loop catenary and the tower to form a three-dimensional scene.
2. The power line digital twin scene construction method according to claim 1, characterized in that: the topological rule is as follows: dividing the tower into a terminal pole, a tension pole and a corner pole in the line, virtualizing a line on the left hand side of the advancing direction of the line as a reference line, calculating the distance between a hanging point and the virtual line, sequencing the distance, and taking the hanging points with the same sequencing of two adjacent poles as alignment hanging points which are correct matching hanging points for connecting return lines.
3. The power line digital twin scene construction method according to claim 1, characterized in that: and calculating the spatial position coordinates of the alignment hanging points by adopting the spatial position of the tower model and the relative coordinates in the attribute information of the hanging points.
4. The power line digital twin scene construction method according to claim 1, characterized in that: the refined three-dimensional tower model is constructed based on a standard typical design library, the tower is divided into two components, namely a rod and a rod head, the model is constructed respectively by taking a meter as a unit, and the model is assembled.
5. The power line digital twin scene construction method according to claim 4, characterized in that: the method is characterized in that model processing is required in the construction process of the refined three-dimensional tower model, and comprises the steps of carrying out lightweight processing on model data, reducing the number of vertexes of the tower model and providing conditions for batch placement of towers in a scene.
6. The power line digital twin scene construction method according to claim 1, characterized in that: the attributes of the tower hanging points comprise hanging point numbers and hanging point coordinates, and the hanging point coordinates are offset values relative to the center of the bottom of the tower.
7. The power line digital twin scene construction method according to claim 1, characterized in that: there are four different modes of tower: the terminal rod, the tension rod, the corner rod and the branch rod are arranged on the frame; only one end of the terminal rod is provided with a hanging point; hanging points are arranged at two ends of the tension rod in the horizontal direction; the transfer rod is provided with a hanging point on the edge formed by a certain included angle; the branch rod is divided into three directions with hanging points; and calculating a catenary equation according to the positions of the matched hanging points determined at the two ends of the rod.
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