A method for overall site planning of substation engineering projects based on BIM technology

Abstract

The present invention provides a method for overall planning of substation sites for power substation projects based on BIM technology, creates a standard BIM model library suitable for the early stages of power substation projects, and fuses the lightweight BIM model with GIS data to complete a visualized simulation of the overall planning scheme of the substation site for power substation projects and a display of the real scene of the substation site planning area for power substation projects in a three-dimensional scene. The present invention performs technical processing such as spatial coordinate unification, data lightweighting, data interaction, and lossless data fusion on the multi-source heterogeneous BIM and GIS data of power substation projects, and intuitively, accurately, and efficiently displays the overall planning design scheme of the substation site for power substation projects in a three-dimensional scene, realizing the simultaneous display of "one scene, multiple schemes", proposing a new solution for the application of BIM technology in the early planning and decision-making stages of power substation projects, and promoting the three-dimensional digital construction of power substation projects throughout their life cycle.

Description

Technical Field

[0001] The present invention relates to the field of power transmission and transformation engineering, and in particular to a method for overall planning of power transformation engineering sites based on BIM technology. Background Art

[0002] Three-dimensional digital technology has been widely used in engineering design stages such as preliminary design and construction drawing design for power transmission and transformation projects, but its application is less common in the early planning and decision-making stages of projects, such as pre-feasibility studies and feasibility studies. Substation sites for power transmission and transformation projects present construction challenges, including large scale, complex terrain, multiple disciplines involved, and impacts on transmission line routing. During the early planning phase, overall site planning is crucial for project construction. Drawing a master plan on a two-dimensional topographic map makes it difficult to intuitively reflect key decision-making elements, such as the site's original appearance, topography and elevation, site cut-and-fill balance, inbound and outbound line routing, access road connections, on-site facility layout, and the relative position of the proposed project to the surrounding environment. Furthermore, conventional design models, which express design intent through two-dimensional drawings and text reports, often result in owners and reviewers failing to fully grasp the design intent during proposal presentations or reviews, resulting in inefficient communication and repeated proposal revisions, hindering project progress. Summary of the Invention

[0003] In view of the large differences in design objects, planning points and BIM software involved in different engineering fields, the present invention provides a substation site master planning method based on BIM technology, which simulates a three-dimensional visual site master planning design scheme and a real scene of the site area, intuitively and accurately expresses the design intent, and assists in the site scheme comparison and optimization in the early stage of the project, which is conducive to improving the efficiency of scheme decision-making and shortening the project progress.

[0004] The technical solution adopted by the present invention is as follows: a method for overall planning of substation sites for power substation projects based on BIM technology, which creates a standard BIM model library suitable for the early stage of substation projects, and integrates the lightweight BIM model with GIS data to complete the visualization simulation of the overall planning scheme of substation sites for power substation projects and the display of the real scene of the substation site planning area for power substation projects in a three-dimensional scene.

[0005] Furthermore, the following specific steps are included:

[0006] Step 1: Divide GIS data into three categories: terrain elevation data, vector data, and satellite image data, and process them to generate corresponding data files to ensure that all types of GIS data are in a unified coordinate system;

[0007] Step 2: Create a general BIM model for the power transmission and transformation project, perform lightweight processing on the model, merge all the lightweighted models, and output the model file;

[0008] Step 3: Import the GIS data file into the InfraWorks software to form the original 3D scene of the site. Then import the model file and perform spatial positioning in the 3D scene to complete the integration of the 3D scene and the BIM model.

[0009] Step 4: Arrange the access roads and inlet and outlet lines in the 3D scene to complete the overall site planning of the substation project.

[0010] Furthermore, in step 1, the terrain elevation data processing process is:

[0011] Step 1.1.1. Obtain a two-dimensional topographic map of the site through surveying and mapping, and use the elevation data in the topographic map to generate the original topographic surface in Civil3D software;

[0012] Step 1.1.2: Create the site leveling and grading surfaces based on the original terrain surface;

[0013] Step 1.1.3: Export both the original terrain surface and the field slope surface to .LandXML format for data exchange of surface graphics.

[0014] Furthermore, in step 1, the vector data processing process is:

[0015] Step 1.2.1: Create the original feature vector graphics in the topographic map into a collection of features with closed boundaries according to feature type. Use the CreateParcelFromObjects command to batch create "parcel" objects from the geometric features with closed boundaries. Use the ExportToSDF command to export different types of parcels into the spatial data format .SDF.

[0016] Step 1.2.2: Use the CreateAlignmentEntities command to convert the proposed approach road path line into a "route" fixed entity. Use the IMXExport command to export the route entity to the .IMX format.

[0017] Step 1.2.3: Obtain vector data from the electronic map file for special protected areas or sensitive areas, and output them in .SHP file format.

[0018] Furthermore, in step 1, the satellite image data processing process is as follows: the satellite image data can be obtained through an Internet map download tool, and the latitude and longitude (B, L, H) coordinate system of the satellite image should be converted into the Gaussian plane rectangular coordinate system (X, Y, Z) that is the same as the plane topographic map, and the data file format is .tif.

[0019] Furthermore, the sub-steps of step 2 are:

[0020] Step 2.1: Based on the common schemes in power transmission and transformation projects, create common model libraries for electrical and civil engineering respectively based on a unified reference point;

[0021] Step 2.2: Lightweight all common models in the model library;

[0022] Step 2.3: Export the lightweight electrical BIM model to .dgn format and the lightweight civil engineering BIM model to .IFC format, and import them into Bentley Microstation software. Use the "Merge to Master File" command to merge all BIM models and export them to .dgn format.

[0023] Furthermore, in step 2, the lightweight processing includes: reducing the scope of the hidden engineering model, focusing on the external structure, deleting geometric elements and attribute information that have little impact on the model, and simplifying the detailed structure.

[0024] Furthermore, the specific steps of step 3 are:

[0025] Step 3.1: In InfraWorks, use the LandXML command, SDF command, SHP command, and Raster command under the data source tool to import terrain and site surfaces, ground feature vectors, electronic map vectors, and satellite image data files to form the original 3D scene of the site.

[0026] Step 3.2: Import all merged BIM models into the Infraworks software, and obtain the (X, Y, Z) coordinate values of the spatial position of the BIM model benchmark of the entire site from the topographic map. Enter the coordinate values, azimuth angle values, and model unit scale in the Infraworks data source configuration to complete the spatial positioning of the model.

[0027] Furthermore, in step 3.2, when importing the BIM model, the DGN 3D Model command under the data source tool is used to complete the one-time import of the entire site BIM model.

[0028] Furthermore, the specific steps of step 4 are:

[0029] Step 4.1: Import the road path in .IMX format into InfraWorks software, design the road longitudinal section and cross section, and arrange the road components;

[0030] Step 4.2: Based on the station layout, the coordinates of the tower outside the station, and the external constraints, perform route planning for the incoming and outgoing lines.

[0031] Step 4.3: After completing the site planning, display the comparison of multiple site options in the same 3D scene.

[0032] Compared with the existing technology, the beneficial effects of adopting the above technical solution are: the present invention carries out technical processing such as spatial coordinate unification, data lightweighting, data interaction, and lossless data fusion for the multi-source heterogeneous BIM and GIS data of the substation project, and intuitively, accurately and efficiently displays the overall planning and design scheme of the substation site in a three-dimensional scene, realizing the simultaneous display of "one scene, multiple schemes", and proposing a new solution for the application of BIM technology in the early planning and decision-making stages of substation projects, and promoting the three-dimensional digital construction of substation projects throughout their life cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a flow chart of the overall planning method for substation sites of power substation projects based on BIM technology proposed in this invention.

[0034] Figure 2 Schematic diagram of the original terrain triangulation surface in one embodiment of the present invention.

[0035] Figure 3 Schematic diagram of the site and slope surface in one embodiment of the present invention.

[0036] Figure 4 Schematic diagram of the General Electric BIM model in one embodiment of the present invention.

[0037] Figure 5 Schematic diagram of a general civil engineering BIM model in one embodiment of the present invention.

[0038] Figure 6 Schematic diagram showing a comparison of a capacitor tower model before and after simplification in one embodiment of the present invention.

[0039] Figure 7 This is a three-dimensional site schematic diagram of the site after field leveling in one embodiment of the present invention.

[0040] Figure 8 Schematic diagram of the relationship between the site range and the surrounding sensitive areas in one embodiment of the present invention.

[0041] Figure 9 This is a schematic diagram of the integration of BIM model and 3D GIS in one embodiment of the present invention.

[0042] Figure 10 This is a schematic diagram of the access road planning in one embodiment of the present invention.

[0043] Figure 11 This is a schematic diagram of multiple scheme comparison in one embodiment of the present invention. DETAILED DESCRIPTION

[0044] The embodiments of the present application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar modules or modules with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application. On the contrary, the embodiments of the present application include all changes, modifications, and equivalents that fall within the spirit and scope of the appended claims.

[0045] like Figure 1 As shown in the figure, a BIM-based substation site planning method is used to create a standard BIM model library suitable for the early stages of substation projects. The lightweight BIM model is integrated with GIS data to complete the visualization of the substation site planning scheme simulation and the real scene display of the substation site planning area in a 3D scene. The specific steps are as follows:

[0046] Step 1: Divide GIS data into three categories: terrain elevation data, vector data, and satellite image data, and process them to generate corresponding data files to ensure that all types of GIS data are in a unified coordinate system;

[0047] Step 2: Create a general BIM model for the power transmission and transformation project, perform lightweight processing on the model, merge all the lightweighted models, and output the model file;

[0048] Step 3: Import the GIS data file into the InfraWorks software to form the original 3D scene of the site. Then import the model file and perform spatial positioning in the 3D scene to complete the integration of the 3D scene and the BIM model.

[0049] Step 4: Arrange the access roads and inlet and outlet lines in the 3D scene to complete the overall site planning of the substation project.

[0050] In this embodiment, GIS data is fully utilized, taking into account external constraints such as terrain elevation, landforms, land use planning, and access line planning, so as to quickly, intuitively, and accurately express design intent in a three-dimensional visualization scene and improve communication efficiency. Therefore, it is necessary to first obtain and process GIS data.

[0051] In step 1, due to the different sources and types of GIS data, GIS data are divided into three categories: terrain elevation data, vector data, and satellite image data to ensure that all types of GIS data are in a unified coordinate system.

[0052] For terrain elevation data: In this embodiment, a two-dimensional topographic map is obtained mainly through drone aerial survey or on-site mapping, and then in Civil3D software, such as Figure 2As shown in the figure, the elevation data such as contour lines, elevation points or elevation blocks in the topographic map are discretized to generate the original terrain surface; then based on the original terrain surface, the software's grading design function is used to create the site area leveling and grading surface, as shown in the figure. Figure 3 As shown; finally, the original terrain surface and the field slope surface are exported to the .LandXML format through the LandXMLOut command for data interaction of surface graphics.

[0053] Regarding vector data: in this embodiment, the sources of vector data include surveyed topographic maps and electronic map files formed by on-site collection.

[0054] 1. Topographic map vector data: The original feature vector graphics in the topographic map (such as buildings, power facilities, rivers, water areas, vegetation, etc.) are created as closed-boundary geometric features according to the feature category; the CreateParcelFromObjects command is used to batch create closed-boundary geometric features as "parcel" objects, and the ExportToSDF command is used to export different types of parcels to the spatial data format .SDF; the CreateAlignmentEntities command is used to convert the proposed approach road path line into a "route" fixed entity, and the IMXExport command is used to export the route entity to the .IMX format.

[0055] 2. Electronic map file vector data: The vector data in the electronic map file mainly includes special protected areas or sensitive areas, such as weak geological areas, basic farmland areas, land use planning areas, etc. This embodiment outputs them into .SHP file format.

[0056] For satellite image data: In this embodiment, it is obtained through an Internet map download tool or drone aerial survey. The commonly used data format of satellite raster files is .tif. The latitude and longitude (B, L, H) coordinate system of the satellite image should be converted into the same Gaussian plane rectangular coordinate system (X, Y, Z) as the plane topographic map.

[0057] After completing GIS data processing, it is necessary to complete the establishment of the BIM model library, specifically:

[0058] In this embodiment, combined with the common design schemes commonly used in power transmission and transformation projects, a common model library for electrical and civil engineering is created based on a unified reference point; Figure 4 The following is a GE BIM model: Figure 5 Shown is a general civil engineering BIM model.

[0059] In order to improve the efficiency of model data interaction and the display effect in the GIS scene, in this embodiment, the model is lightweighted, including reducing the model scope of hidden projects, focusing on the external structure, deleting geometric elements and attribute information that have little impact on the model, and simplifying the detailed structure; Figure 6 Shown are simplified before and after images of a capacitor tower model.

[0060] After lightweight processing, the electrical BIM model is exported as .dgn and the civil engineering BIM model is exported as .IFC lightweight data format, and imported into Bentley Microstation software. All BIMs are merged and exported as .dgn format using the "Merge to Master File" command.

[0061] After obtaining the processed GIS data and the general BIM model library, data fusion is required. The specific process is as follows:

[0062] 1. In Infraworks software, use the LandXML command, SDF command, SHP command, and Raster command under the data source tool to import terrain and site surface, ground feature vector, electronic map vector, and satellite image data files to form the original 3D scene of the site, such as Figure 7 The figure shows a three-dimensional site schematic diagram of the site after the site is leveled in this embodiment; Figure 8 This is a schematic diagram of the relationship between the site range and the surrounding sensitive areas in this embodiment.

[0063] 2. Load the merged BIM model in Infraworks using the DGN 3D Model command under the data source tool; obtain the (X, Y, Z) coordinates of the spatial position of the BIM model reference point of the entire site from the topographic map, enter the coordinate values, azimuth angle values, and model unit scale in the Infraworks data source configuration to complete the spatial positioning of the model and realize data fusion; Figure 9 The figure shows the schematic diagram after the fusion of BIM model and 3D GIS.

[0064] In this embodiment, the entire site BIM model is imported at one time, with a unified data format, high interaction efficiency, and avoidance of model data loss.

[0065] After completing data fusion in the 3D scene, further site planning is carried out, including planning of access roads and inbound and outbound lines;

[0066] Among them, the access road planning is as follows: Figure 10 As shown, import the road path in .IMX format into the Infraworks software, design the road longitudinal section line and cross section, and arrange road components such as materials, grading, lanes, and curbs.

[0067] The planning of access lines is completed based on the station layout, the coordinates of the towers outside the station, and external constraints.

[0068] After completing the above-mentioned site master plan, it can be displayed in a three-dimensional scene; it should be noted that if Figure 11 As shown, the aforementioned site master planning process can be repeated to achieve the comparison of multiple site plans in the same three-dimensional scene.

[0069] The BIM-based overall planning method for substation sites proposed in this invention has the following advantages:

[0070] 1. Make full use of GIS data, taking into account external constraints such as terrain elevation, landforms, land use planning, and access line planning, to quickly, intuitively, and accurately express design intent in a three-dimensional visualization scene, improve communication efficiency, and innovatively realize the application of GIS+BIM technology in the early planning stage of substation projects.

[0071] 2. It helps to assist engineering decision-making, reduce demolition, rationally utilize land, ensure smooth line outflow, and short-circuit access roads to the station, making the overall planning of the station area more scientific, compliant, and harmonious with the surrounding environment.

[0072] 3. It solves the problems of substation engineering GIS data such as wide sources, multiple data types, inconsistent expression methods, and difficulty in integration. By classifying and analyzing GIS data, it integrates diverse GIS data into a unified platform to achieve three-dimensional expression of two-dimensional GIS data.

[0073] 4. It solves the problems of substation projects involving multiple disciplines, inconsistent 3D design platforms, poor model data compatibility, and large model data volumes, and realizes cross-platform and cross-disciplinary BIM model data interaction. It also improves data transmission efficiency by lightweighting the model.

[0074] 5. It realizes the integration of multi-source heterogeneous GIS and BIM data in three-dimensional visualization scenes, ensuring the compatibility of data formats, consistency of spatial coordinates, integrity of data information and efficient data transmission.

[0075] It should be noted that, in the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "setting" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances; the drawings in the embodiments are used to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations.

[0076] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A method for overall planning of substation sites based on BIM technology, characterized in that: A standard BIM model library suitable for the early stages of substation projects is created, and the lightweight BIM model is integrated with GIS data to complete a visual simulation of the substation site master plan and a real-life scene display of the substation site planning area in a three-dimensional scene. The substation site master plan method includes the following specific steps: Step 1: Divide GIS data into three categories: terrain elevation data, vector data, and satellite image data, and process them to generate corresponding data files, unifying the coordinate systems of various GIS data. Step 2: Create a general BIM model for the power transmission and transformation project, perform lightweight processing on the model, merge all the lightweighted models, and output the model file; Step 3: Import the GIS data file into the InfraWorks software to form the original 3D scene of the site. Then import the model file and perform spatial positioning in the 3D scene to complete the integration of the 3D scene and the BIM model. Step 4: Arrange the access roads and inbound and outbound lines in the 3D scene to complete the overall site planning of the substation project; The sub-steps of step 2 are: Step 2.1: Based on the common schemes in power transmission and transformation projects, create common model libraries for electrical and civil engineering respectively based on a unified reference point; Step 2.2: Lightweight all common models in the model library; Step 2.3: Export the lightweight electrical BIM model to .dgn format and the lightweight civil engineering BIM model to .IFC format. Import them into Bentley Microstation software and use the "Merge to Master File" command to merge all BIM models and export them to .dgn format. The specific steps of step 3 are: Step 3.1: In InfraWorks, use the command under the data source tool to import terrain elevation data, vector data, and satellite image data to form the original 3D scene of the site. Step 3.2: Import all merged BIM models into Infraworks and obtain the (X, Y, Z) coordinates of the spatial locations of the BIM model reference points for the entire site from the topographic map. Enter the coordinate values, azimuth angle values, and model unit scale in the Infraworks data source configuration to complete the spatial positioning of the model.

2. The method for overall planning of substation site based on BIM technology according to claim 1 is characterized in that: In step 1, the terrain elevation data processing process is as follows: Step 1.1.

1. Obtain a two-dimensional topographic map of the site through surveying and mapping, and use the elevation data in the topographic map to generate the original topographic surface in Civil3D software; Step 1.1.2: Create the site leveling and grading surfaces based on the original terrain surface; Step 1.1.3: Export both the original terrain surface and the field slope surface to .LandXML format for data exchange of surface graphics.

3. The method for overall planning of substation site for power transformation project based on BIM technology according to claim 1 or 2, characterized in that: In step 1, the vector data processing process is as follows: Step 1.2.1: Create the original feature vector graphics in the topographic map into collection features of closed boundaries according to feature type. Use the CreateParcelFromObjects command to batch create "parcel" objects from the closed boundary geometric features. Use the ExportToSDF command to export different types of parcels to the spatial data format .SDF. Step 1.2.2: Use the CreateAlignmentEntities command to convert the proposed approach road path into a fixed "alignment" entity. Use the IMXExport command to export the alignment entity to the .IMX format. Step 1.2.3: Obtain vector data from the electronic map file for special protected areas or sensitive areas, and output them in .SHP file format.

4. The method for overall planning of substation site for power transformation project based on BIM technology according to claim 1 is characterized in that: In step 1, the satellite image data processing process is as follows: the satellite image data is obtained through an Internet map download tool, and the latitude and longitude (B, L, H) coordinate system of the satellite image should be converted into the Gaussian plane rectangular coordinate system (X, Y, Z) that is the same as the plane topographic map. The data file format is .tif.

5. The method for overall planning of substation site for power transformation project based on BIM technology according to claim 1 is characterized in that: In step 2.2, the lightweighting process includes: reducing the scope of the hidden engineering model, focusing on the external structure, deleting geometric elements and attribute information that have little impact on the model, and simplifying the detailed structure.

6. The method for overall planning of substation site for power transformation project based on BIM technology according to claim 1 is characterized in that: In step 3.2, when importing the BIM model, the DGN 3D Model command under the data source tool is used to complete the one-time import of the entire site BIM model.

7. The method for overall planning of substation site for power transformation project based on BIM technology according to claim 1, characterized in that: The specific steps of step 4 are: Step 4.1: Import the road path in .IMX format into InfraWorks software, design the road longitudinal section and cross section, and arrange the road components; Step 4.2: Based on the station layout, the coordinates of the tower outside the station, and the external constraints, perform route planning for the incoming and outgoing lines. Step 4.3: After completing the site planning, display the comparison of multiple site options in the same 3D scene.

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