A method and system for intelligent laying path planning of power cables

Abstract

This invention provides a method and system for intelligent power cable laying path planning, relating to the field of power cable laying technology. The method includes: acquiring project layout information and cable parameter information; constructing a spatial model of the area to be laid, dividing the laying area, and obtaining multiple candidate laying units; performing laying constraint analysis to obtain constraint identification information; assigning path costs to obtain a laying cost map; performing path search to obtain a set of candidate laying paths; performing bending radius verification, traction force verification, and construction access verification to obtain a set of target candidate paths; determining the recommended laying path and sending it to the construction management terminal. This invention solves the technical problem in the prior art where power cable laying paths rely on manual planning, which easily leads to subsequent rework and scheme adjustments due to insufficient early path feasibility assessment, thereby reducing path planning efficiency and affecting the overall construction progress of the cable laying project.

Description

Technical Field

[0001] This invention relates to the field of power cable laying technology, specifically to a method and system for intelligent power cable laying path planning. Background Technology

[0002] In the construction of power engineering, industrial plants, building electromechanical installation, and power distribution systems, power cables usually need to be laid in complex spaces such as cable trays, cable trenches, pipe corridors, equipment foundations, and construction passages.

[0003] In existing technologies, the laying path of power cables is mostly determined by design drawings and human experience. This manual planning method usually requires on-site personnel to repeatedly check between the engineering layout drawings, on-site measurement data and the actual construction environment. When there are many existing pipelines in the area to be laid, the equipment foundations are complexly distributed, the cable trays are intersecting, or the laying path is long, the number of spatial objects and constraints to be checked increases accordingly, and the workload and difficulty of manual judgment increase accordingly.

[0004] Furthermore, manual planning is prone to insufficient judgment in local areas. When problems arise, construction workers often need to suspend the original laying plan, re-check the site space conditions and adjust the route. This process not only increases the workload of secondary measurement, plan review and construction coordination, but may also force the scheduled construction procedures to be delayed, affecting the overall construction progress of the cable laying project. Summary of the Invention

[0005] This application provides a method and system for intelligent power cable laying path planning, which aims to solve the technical problem that in the prior art, power cable laying paths rely on manual planning, which is prone to rework and scheme adjustment due to insufficient feasibility assessment of the path in the early stage, thereby reducing the efficiency of path planning and affecting the overall construction progress of the cable laying project.

[0006] The first aspect of this application discloses a method for intelligent laying path planning of power cables. The method includes: acquiring engineering layout information of the area to be laid and cable parameter information of the cable to be laid; constructing a spatial model of the area to be laid based on the engineering layout information, and dividing the spatial model of the area to be laid into laying areas to obtain multiple laying candidate units; performing laying constraint analysis on the multiple laying candidate units based on the cable parameter information to obtain constraint identification information of each laying candidate unit; assigning path cost values ​​to the multiple laying candidate units based on the constraint identification information to obtain a laying cost map; performing path search based on the cable starting position and cable ending position of the engineering layout information, combined with the laying cost map, to obtain a set of candidate laying paths; performing bending radius verification, traction force verification, and construction access verification on the set of candidate laying paths to obtain a set of target candidate paths that meet the laying conditions; determining a recommended laying path from the set of target candidate paths according to preset path evaluation rules, and sending the recommended laying path to the construction management terminal.

[0007] The second aspect of this application discloses a smart power cable laying path planning system. The system is used in the aforementioned smart power cable laying path planning method. The system includes: an information acquisition module for acquiring engineering layout information of the area to be laid and cable parameter information of the cable to be laid; a laying area division module for constructing a spatial model of the area to be laid based on the engineering layout information, and dividing the spatial model into laying areas to obtain multiple laying candidate units; and a laying constraint analysis module for performing laying constraint analysis on each of the multiple laying candidate units based on the cable parameter information to obtain constraint identification information for each laying candidate unit. The path cost assignment module is used to assign path costs to the multiple laying candidate units according to the constraint identification information to obtain a laying cost map; the path search module is used to perform path search based on the cable start-point and cable end-point positions in the engineering layout information, combined with the laying cost map, to obtain a set of candidate laying paths; the verification module is used to verify the bending radius, traction force, and construction accessibility of the set of candidate laying paths to obtain a set of target candidate paths that meet the laying conditions; the recommended laying path acquisition module is used to determine a recommended laying path from the set of target candidate paths according to preset path evaluation rules, and send the recommended laying path to the construction management terminal.

[0008] One or more technical solutions provided in this application have at least the following beneficial effects:

[0009] By acquiring the engineering layout information of the area to be laid and the cable parameter information of the cable to be laid, an accurate data foundation can be provided for modeling the area, judging laying conditions, and planning the route, avoiding the route planning from deviating from the on-site engineering conditions and the performance requirements of the cable itself. By constructing a spatial model of the area to be laid based on the engineering layout information and dividing the spatial model into laying areas, the complex on-site environment can be transformed into multiple calculable and analyzable laying candidate units, facilitating subsequent constraint identification, path cost calculation, and path search. By performing laying constraint analysis on multiple laying candidate units based on cable parameter information, it is possible to identify whether each candidate unit meets laying requirements such as cable bending, safety distance, and traction, thereby distinguishing between layable areas, restricted laying areas, and prohibited laying areas, improving the safety of route planning. By assigning path cost values ​​to multiple laying candidate units based on constraint identification information, the laying distance can be adjusted accordingly. Distance, construction space, limiting factors, and prohibited passage conditions are transformed into cost data that can be used for path search, enabling the path planning process to comprehensively consider construction difficulty and laying risks. By searching for paths based on the cable's starting and ending points and combining them with the laying cost map, multiple candidate laying paths from the starting point to the ending point can be automatically obtained, reducing the workload of manual route selection and providing alternative solutions for subsequent path verification and optimization. By verifying the bending radius, traction force, and construction accessibility of the candidate laying path set, paths that do not meet the cable laying safety requirements or on-site construction conditions can be eliminated, ensuring that the obtained target candidate paths are actually feasible for construction. By determining the recommended laying path from the target candidate path set according to the preset path evaluation rules and sending it to the construction management end, the laying scheme with the better overall effect can be selected from multiple feasible paths, improving the rationality of cable laying path selection and construction management efficiency.

[0010] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0011] Figure 1 This is a schematic flowchart of an intelligent power cable laying path planning method provided in an embodiment of this application.

[0012] Figure 2 This is a schematic diagram of a smart power cable laying path planning system provided in an embodiment of this application.

[0013] Explanation of reference numerals in the attached diagram: Information acquisition module 10, laying area division module 20, laying constraint analysis module 30, path cost assignment module 40, path search module 50, verification module 60, recommended laying path acquisition module 70. Detailed Implementation

[0014] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0015] Example 1, as Figure 1 As shown in the figure, this application provides a method for intelligent laying path planning of power cables, the method including: Obtain the engineering layout information of the area to be laid, as well as the cable parameter information of the cable to be laid.

[0016] The system obtains engineering layout information for the area to be laid and cable parameter information for the cable to be laid. The engineering layout information includes the cable start point location, end point location, existing pipeline location, cable tray location, cable trench location, equipment foundation location, and construction passage location, etc., to determine the spatial environment for cable laying. The cable parameter information includes voltage level, cable outer diameter, weight per unit length, minimum allowable bending radius, and maximum allowable traction force, etc., to subsequently determine whether the cable can be safely laid in the corresponding area.

[0017] Based on the project layout information, a spatial model of the area to be laid is constructed, and the spatial model of the area to be laid is divided into laying areas to obtain multiple laying candidate units.

[0018] Based on the acquired engineering layout information, a spatial model of the area to be laid is constructed. Specifically, BIM modeling can be performed by combining on-site scanning data and engineering layout information, and the coordinates of the two are unified to ensure that existing components, passages, cable trays, cable trenches, etc., are all under the same coordinate system. Based on the regional component data, layable and non-layable areas are distinguished, and the layable areas are divided into grids to form multiple laying candidate units. Each laying candidate unit records its location coordinates, spatial dimensions, and the type of laying carrier it belongs to.

[0019] Based on the cable parameter information, laying constraint analysis is performed on the multiple laying candidate units to obtain the constraint identification information of each laying candidate unit.

[0020] Based on cable parameter information, a laying constraint analysis is performed on each candidate laying unit. Specifically, the unit's compliance with turning laying requirements is determined by the cable's outer diameter and minimum allowable bending radius; the path length and traction conditions are determined by the weight per unit length and maximum allowable traction force; and the safety distance requirements between the unit and surrounding facilities such as existing pipelines, heat source equipment, high-voltage equipment, and maintenance access are determined by the voltage level. Based on the analysis results, laying permit, restricted laying, or prohibited laying labels are generated for each candidate laying unit.

[0021] Based on the constraint identification information, path costs are assigned to the multiple laying candidate units to obtain a laying cost map.

[0022] Based on the constraint identification information of each candidate laying unit, path costs are assigned to generate a laying cost map. For layable units, foundation costs are assigned based on laying distance, construction space, support utilization, and path straightness. For restricted laying units, penalty costs are added based on factors such as turning restrictions, narrow spaces, intersecting pipelines, proximity to heat sources, insufficient maintenance space, or restricted access for construction equipment. For prohibited laying units, an inaccessible cost is assigned. Finally, according to the connection relationship between adjacent units, each unit and its comprehensive path cost are connected to form a laying cost map for subsequent path search.

[0023] Based on the cable start and end points of the engineering layout information, and combined with the laying cost map, a path search is performed to obtain a set of candidate laying paths.

[0024] Based on the project layout information, the starting and ending points of the cable are determined, and the corresponding starting and ending nodes are matched in the laying cost map. Using the starting node as the search starting point and the ending node as the search target, a path search is performed by combining the comprehensive path cost of each candidate laying unit. During the search, units with prohibited laying indicators are avoided, and units with lower cost and better connectivity are prioritized to form multiple connectable initial laying paths. A preset number of paths are selected according to the total path cost from low to high to obtain a candidate laying path set.

[0025] The set of candidate laying paths is checked for bending radius, traction force and construction access, to obtain a set of target candidate paths that meet the laying conditions.

[0026] For each path in the candidate laying path set, the laying conditions are checked. Specifically, turning nodes and adjacent path segments are extracted from the path, the actual bending radius is calculated, and compared with the minimum allowable bending radius of the cable. The expected traction force is calculated based on the path length, number of turns, slope information, and weight per unit length, and compared with the maximum allowable traction force. Taking into account the width of construction equipment, the width of passage for workers, and the requirements for maintenance space, it is determined whether the path meets the on-site construction access conditions. Paths that meet the requirements for bending radius, traction force, and construction access are selected as the target candidate path set.

[0027] According to the preset path evaluation rules, a recommended laying path is determined from the target candidate path set, and the recommended laying path is sent to the construction management terminal.

[0028] According to the preset path evaluation rules, the set of target candidate paths is comprehensively evaluated. Specifically, the path length evaluation value, number of turns evaluation value, construction difficulty evaluation value, support utilization evaluation value, and operation and maintenance convenience evaluation value of each target candidate path are calculated separately. The paths are then weighted according to preset weights to obtain the comprehensive path evaluation value. The paths whose comprehensive evaluation values ​​meet the preset optimization conditions are determined as recommended laying paths and sent to the construction management terminal for construction personnel to view and execute.

[0029] Furthermore, the engineering layout information also includes the locations of existing pipelines, cable trays, cable trenches, equipment foundations, and construction access routes; the cable parameter information includes voltage level, cable outer diameter, weight per unit length, minimum allowable bending radius, and maximum allowable traction force.

[0030] In addition to the starting and ending points of the cables, the project layout information also includes the locations of existing pipelines, cable trays, cable trenches, equipment foundations, and construction access routes. This information is used to reflect the existing structures, available laying carriers, and construction access conditions within the area to be laid, providing basic data for spatial modeling, area division, and path search.

[0031] Cable parameter information includes voltage rating, cable outer diameter, weight per unit length, minimum allowable bending radius, and maximum allowable traction force. Among them, voltage rating is used to determine safety clearance requirements, cable outer diameter and minimum allowable bending radius are used to determine the laying conditions at bends, and weight per unit length and maximum allowable traction force are used to determine the traction safety of the cable during the laying process.

[0032] Furthermore, a spatial model of the area to be laid is constructed based on the engineering layout information, and the spatial model of the area to be laid is divided into laying areas to obtain multiple laying candidate units, including: Acquire on-site scanning data of the area to be laid; perform coordinate unification processing on the on-site scanning data and engineering layout information, and then perform BIM modeling to construct a spatial model of the area to be laid; extract regional component data under a unified coordinate system based on the spatial model of the area to be laid; extract layable and non-layable areas based on the regional component data; perform grid processing on the layable areas to obtain multiple laying candidate units, wherein each laying candidate unit is configured with location coordinates, spatial dimensions, and the type of laying carrier to which it belongs.

[0033] Acquire on-site scanning data of the area to be laid. On-site scanning data can be collected through 3D laser scanning, mobile measuring equipment or on-site mapping equipment. It is used to reflect the actual spatial status of walls, ground, cable trays, pipelines, equipment foundations, passages, etc. in the area to be laid. After the data is collected, the on-site scanning data can be denoised, stitched and preliminarily registered to reduce the impact of on-site obstruction, measurement errors or duplicate data on subsequent modeling.

[0034] The on-site scanning data and engineering layout information are processed to unify the coordinates. Specifically, fixed components, control points or equipment foundations in the area to be laid can be selected as reference points. The coordinates of the scanning data and the coordinates of the engineering layout are translated, rotated and scaled to make them in the same spatial coordinate system.

[0035] BIM modeling is performed to construct a spatial model of the area to be laid. Specifically, on-site scan data can be used as a reference for the actual spatial outline. Existing pipelines, cable trays, cable trenches, equipment foundations, and construction access roads in the project layout information are converted into corresponding BIM components, and the spatial relationships between these components are established. In this way, the spatial model of the area to be laid can reflect both the design layout and the actual on-site construction environment.

[0036] Extract regional component data under a unified coordinate system, including the positional relationships of various pipelines, cable trays, cable trenches, equipment foundations, and construction access routes, to facilitate subsequent regional assessment.

[0037] Based on the regional component data under a unified coordinate system, feasible and non-feasible areas are extracted. Specifically, feasible areas are determined by the location of components such as cable trays, cable trenches, and reserved passages, while non-feasible areas are determined by equipment foundations, wall obstacles, occupied pipelines, restricted maintenance space, and areas that do not meet safety distance requirements. Areas with narrow spaces, intersecting pipelines, or proximity to heat source equipment can also be marked as restricted areas to provide a basis for subsequent constraint analysis.

[0038] The extracted layable area is gridded, specifically divided into several continuous spatial units according to a preset grid size or parameters such as cable outer diameter, cable tray width, and cable trench size. Each candidate layable unit is configured with location coordinates, spatial dimensions, and its corresponding layable carrier type, including cable trays, cable trenches, supports, ground passages, or reserved pipe racks. This process transforms the continuous space into calculable and searchable path nodes, providing a data foundation for subsequent path cost assignment and path search.

[0039] Furthermore, based on the cable parameter information, laying constraint analysis is performed on each of the multiple laying candidate units to obtain constraint identification information for each laying candidate unit, including: Based on the cable's outer diameter and minimum allowable bending radius, path turning constraints are determined; based on the weight per unit length and maximum allowable traction force, traction length constraints are determined; based on the voltage level, safety distance constraints between the cable and surrounding facilities are determined, wherein the surrounding facilities include, but are not limited to, existing pipelines, heat source equipment, high-voltage equipment, and maintenance access routes; the path turning constraints, traction length constraints, and safety distance constraints are mapped to the multiple laying candidate units respectively, and constraint identification information is generated based on the mapping results, wherein the constraint identification information includes layable identification, restricted laying identification, and prohibited laying identification.

[0040] Based on the connection direction between adjacent candidate laying units, determine whether there is a turn at the unit intersection, and calculate the turning angle and the actual bending radius that can be formed at the turning position. When the actual bending radius is less than the minimum allowable bending radius, it indicates that the turn is too sharp and is not suitable for direct laying. When the bending radius is close to the limit, the area can be treated as a restricted laying area.

[0041] Based on the length, slope, number of bends, and type of laying carrier of the candidate laying unit, estimate the traction resistance generated when the cable is continuously laid in the area, and calculate the cumulative traction force in combination with the weight per unit length. If the cumulative traction force exceeds the maximum allowable traction force, it indicates that there is a traction risk in the route segment; if it does not exceed but is close to the allowable value, it can be regarded as a restricted laying area that requires the addition of traction equipment or the adoption of auxiliary measures.

[0042] The locations of existing pipelines, heat source equipment, high-voltage electrical equipment, and maintenance access routes are extracted from the regional component data, and the spatial distance between the candidate laying unit and these objects is calculated. For cables of different voltage levels, corresponding minimum safety distance requirements are set. When the distance meets the requirements, the unit can be laid normally. When the distance is insufficient or there is a spatial conflict with surrounding facilities, it is determined to be restricted or prohibited from laying.

[0043] For each candidate laying unit, the analysis results of turning, traction, and safety clearance are overlaid one by one. If all constraints meet the requirements, a laying-ready sign is generated. If there are situations such as large turns, narrow spaces, traction force approaching the limit, or insufficient safety clearance but which can be adjusted through construction measures, a restricted laying sign is generated. If there are situations such as bending radius not meeting the requirements, traction force exceeding the limit, conflict with facilities, or inability to guarantee safety clearance, a prohibited laying sign is generated. This constraint sign information is used for subsequent path cost assignment and path search.

[0044] Furthermore, based on the constraint identification information, path costs are assigned to the plurality of laying candidate units to obtain a laying cost map, including: For laying candidate units with the laidable markings, a basic cost is assigned based on the laying distance, construction space, support utilization, and path straightness. For laying candidate units with the restricted laying markings, a penalty cost is added based on the type of restriction factor. For laying candidate units with the prohibited laying markings, an impassable cost is assigned. Based on the basic cost, penalty cost, and impassable cost, a comprehensive path cost for each laying candidate unit is generated. The laying candidate units are connected according to their adjacent unit relationships to obtain the laying cost map.

[0045] For candidate laying units with laying availability indicators, the foundation cost is assigned based on the laying distance, construction space, support utilization, and path straightness. Shorter laying distances, more ample construction space, better utilization of existing supports or cable trays, and straighter paths result in lower foundation cost; conversely, longer laying distances, limited construction space, or detours increase foundation cost. This prioritizes laying units with convenient construction and reasonable paths during path searching.

[0046] For candidate laying units with restricted laying markings, a penalty value is added based on the type of restrictive factor, in addition to the base penalty value. Restrictive factors include turning restrictions, narrow space restrictions, cross-pipeline restrictions, proximity to heat sources restrictions, insufficient maintenance space restrictions, and construction equipment access restrictions. Different restrictive factors correspond to different penalty weights. For example, lower penalty values ​​are assigned to localized space constraints that have little impact on construction, while higher penalty values ​​are assigned to factors that affect laying safety or subsequent operation and maintenance, such as proximity to heat sources and cross-pipelines.

[0047] For candidate laying units marked with "No Laying" signs, an inaccessible value is assigned. This inaccessible value can be set to a maximum value, or the candidate laying unit can be directly marked as not eligible to participate in path connectivity calculations. In this way, subsequent path search processes will automatically avoid areas where safety clearance is not met, bending radius does not meet requirements, traction force exceeds limits, or there is a spatial conflict with obstacles.

[0048] Based on the basic cost, penalty cost, and impassable cost, a comprehensive path cost is generated for each candidate laying unit. Specifically, the penalty values ​​corresponding to basic factors such as laying distance, construction space, and path straightness are superimposed with the corresponding penalty values ​​of various limiting factors to form the comprehensive path cost for each unit. For prohibited laying units, their comprehensive path cost remains in an impassable state, thereby ensuring that the path planning results meet basic laying safety requirements.

[0049] Based on the spatial location of adjacent units, the type of laying carrier they belong to, and the direction of connection, connection edges between units are established, and the comprehensive path cost of each unit is used as the basis for path search. This forms a laying cost map that includes passable areas, restricted passable areas, and impassable areas, providing a basis for subsequent path search from the cable start point to the end point.

[0050] Furthermore, the types of limiting factors include at least one of the following: turning restrictions, narrow space restrictions, intersecting pipeline restrictions, proximity to heat sources restrictions, insufficient maintenance space restrictions, and construction equipment access restrictions.

[0051] Based on the degree of impact of different limiting factors on laying safety and construction convenience, corresponding penalty values ​​are set. For example, turning restrictions are used to reflect situations where the path turns are large or the bending radius is close to the lower limit of the allowable limit; narrow space restrictions are used to reflect situations where there is insufficient space for construction operations; crossing pipeline restrictions are used to reflect situations where the cable crosses with or is close to existing pipelines; proximity to heat sources restrictions are used to reflect situations where the cable is close to high-temperature equipment; insufficient maintenance space restrictions and construction equipment access restrictions are used to reflect situations where subsequent maintenance and on-site construction conditions are limited.

[0052] Furthermore, based on the cable start and end points of the engineering layout information, and combined with the laying cost map, a path search is performed to obtain a set of candidate laying paths, including: In the laying cost map, a starting node corresponding to the cable's starting point and a termination node corresponding to the cable's ending point are determined. Based on the starting and termination nodes, a path search is performed. During the path search, search branches corresponding to laying candidate units with prohibited laying indicators are eliminated, while search branches that meet the connectivity conditions are retained, resulting in multiple initial laying paths. Based on the comprehensive path cost of each laying candidate unit, a preset number of paths are selected from the multiple initial laying paths in ascending order of total path cost to form the candidate laying path set.

[0053] Based on the cable start and end points in the engineering layout information, the laying candidate unit that is closest to the cable in spatial location and meets the laying conditions is found in the laying cost map, and is determined as the start node and end node respectively. If the start or end point falls between two adjacent candidate units, the corresponding node can be determined according to the principle of closest distance, better connectivity or lower cost.

[0054] Starting from the initial node and targeting the final node, a path search is performed on the laying cost graph. During the search, the search branches are gradually expanded based on the connection relationships between adjacent units, and candidate units with prohibited laying indicators are eliminated so that they do not participate in the path connectivity calculation. For units with layable or restricted laying indicators that meet the adjacent connectivity conditions, their search branches are retained. In this way, multiple initial laying paths connecting the initial node to the final node are obtained.

[0055] Based on the comprehensive path cost of each candidate laying unit traversed by each initial laying path, the corresponding total path cost is calculated. The total path cost is obtained by summing the comprehensive path costs of each unit, and can also be adjusted by considering factors such as path length and number of turns. Multiple initial laying paths are sorted in ascending order of total path cost, and a preset number of paths are selected to form a candidate laying path set.

[0056] Furthermore, the set of candidate laying paths is checked for bending radius, traction force, and construction accessibility to obtain a set of target candidate paths that meet the laying conditions, including: Extract the turning nodes and adjacent path segments from each candidate laying path; calculate the actual bending radius of the path based on the turning nodes and adjacent path segments; compare the actual bending radius of the path with the minimum allowable bending radius to obtain the bending radius verification result; calculate the expected traction force based on the path length, number of turns, slope information, and weight per unit length of each candidate laying path; compare the expected traction force with the maximum allowable traction force to obtain the traction force verification result; perform construction access verification on each candidate laying path based on the width of construction equipment, the width of passage for workers, and the requirements for maintenance space, to obtain the construction access verification result; extract the candidate laying paths that pass all the bending radius verification results, traction force verification results, and construction access verification results, and add them to the target candidate path set.

[0057] Each candidate laying path in the candidate laying path set is analyzed, and the position where the direction changes in the path is extracted as the turning node. The adjacent path segments before and after the turning node are determined. The adjacent path segments are formed by connecting continuous laying candidate units and are used to reflect the entry and exit directions of the cable at that position, providing a basis for subsequent bending radius calculation.

[0058] Based on the spatial relationship between the turning node and its adjacent path segments, the actual bending radius of the path is calculated. Specifically, based on the angle between the path segments before and after the turning node, the length of the path segments, and the spatial dimensions of the candidate units, the bending curve that the cable can form at the turning position is determined, and the corresponding actual bending radius is calculated. For continuous turns or space-constrained areas, the smallest actual bending radius can be taken as the check value for the path.

[0059] The calculated actual bending radius of the path is compared with the minimum allowable bending radius in the cable parameter information. If the actual bending radius is greater than or equal to the minimum allowable bending radius, the turning position is deemed to meet the bending requirements; if it is less than the minimum allowable bending radius, the candidate laying path is deemed to have a non-compliant bending radius. Based on the comparison results of each turning node, the bending radius verification result of the path is generated.

[0060] Based on the path length, number of turns, slope information, and weight per unit length of each candidate laying path, the expected traction force is calculated. Specifically, the basic traction force caused by the cable's self-weight is first calculated based on the total path length and weight per unit length. Then, it is corrected by incorporating slope changes, the number of turns, and frictional resistance at turns to obtain the expected traction force of the candidate laying path during actual laying. The longer the path, the more turns, or the greater the slope change, the higher the expected traction force.

[0061] The expected traction force is compared with the maximum allowable traction force in the cable parameter information. If the expected traction force is less than or equal to the maximum allowable traction force, the candidate laying path is determined to meet the traction safety requirements; if the expected traction force is greater than the maximum allowable traction force, the path is determined to have a risk of exceeding the traction limit. Based on this, a traction force verification result is generated to determine whether the path can be safely laid.

[0062] Based on the requirements for construction equipment width, personnel access width, and maintenance space, each candidate laying path undergoes a construction access check. Specifically, the actual available space width, height, and surrounding obstacles in the area traversed by the path are compared with the space required for construction equipment entry, personnel operation, and subsequent maintenance. If the space along the path meets the construction and maintenance requirements, a construction access check pass result is generated; if there are situations where equipment cannot enter, personnel cannot operate, or maintenance space is insufficient, a construction access check fail result is generated.

[0063] The bending radius verification results, traction force verification results, and construction access verification results for each candidate laying path are summarized. If all three verification results for a candidate laying path pass, it means that the path meets the requirements in terms of cable turning, laying traction, and on-site construction access, and the candidate laying path is added to the target candidate path set. If any verification result fails, the path is not considered as a target candidate path, thus ensuring that all paths evaluated subsequently have practical construction feasibility.

[0064] Furthermore, based on preset path evaluation rules, a recommended laying path is determined from the target candidate path set, and the recommended laying path is sent to the construction management terminal, including: Calculate the path length evaluation value, number of turns evaluation value, construction difficulty evaluation value, support utilization evaluation value, and operation and maintenance convenience evaluation value for each target candidate path in the target candidate path set; calculate the path length evaluation value, number of turns evaluation value, construction difficulty evaluation value, support utilization evaluation value, and operation and maintenance convenience evaluation value according to preset weights to obtain the path comprehensive evaluation value; determine the target candidate path whose path comprehensive evaluation value meets the preset optimization conditions as the recommended laying path.

[0065] Evaluation indicators are calculated for each target candidate path in the target candidate path set. Specifically, the path length evaluation value is calculated based on the total path length, with shorter paths receiving better evaluation; the number of turns evaluation value is calculated based on the number of turning nodes in the path, with fewer turns receiving better evaluation; the construction difficulty evaluation value is calculated based on the spatial conditions of the area traversed by the path, the situation of intersecting pipelines, and the construction access conditions; the support utilization evaluation value is calculated based on the degree to which the path utilizes existing cable trays, supports, or cable trenches; and the operation and maintenance convenience evaluation value is calculated based on whether the path is easy to inspect, maintain, and replace later.

[0066] Based on preset weights, the evaluation values ​​for path length, number of turns, construction difficulty, support utilization, and ease of operation and maintenance are weighted and calculated to obtain a comprehensive path evaluation value. The weights of each evaluation indicator are specifically set according to project requirements; for example, the weight of construction difficulty is increased in scenarios with limited construction space, and the weight of ease of operation and maintenance is increased in scenarios with high post-construction maintenance requirements. Through weighted calculation, an evaluation result that comprehensively reflects the path's economic efficiency, constructability, and maintainability is obtained.

[0067] Based on the comprehensive evaluation value of the route, a recommended laying route is determined from the set of target candidate routes. The preset selection criteria can be the route with the highest comprehensive evaluation value, the lowest total cost, or a route that meets specific construction priority rules. After the recommended laying route is determined, the route, its corresponding direction, the areas it passes through, the key turning points, and the verification results are sent to the construction management terminal for construction personnel to view, confirm, and execute.

[0068] Example 2, based on the same inventive concept as the intelligent power cable laying path planning method in the foregoing examples, such as... Figure 2 As shown in the figure, this application provides an intelligent power cable laying path planning system, the system comprising: The information acquisition module 10 is used to acquire engineering layout information of the area to be laid and cable parameter information of the cable to be laid; the laying area division module 20 is used to construct a spatial model of the area to be laid based on the engineering layout information, and divide the spatial model of the area to be laid into laying areas to obtain multiple laying candidate units; the laying constraint analysis module 30 is used to perform laying constraint analysis on the multiple laying candidate units based on the cable parameter information to obtain constraint identification information of each laying candidate unit; the path cost assignment module 40 is used to assign path cost to the multiple laying candidate units based on the constraint identification information. The system assigns path costs to the data to obtain a laying cost map; the path search module 50 is used to search for paths based on the cable start and end positions in the project layout information, combined with the laying cost map, to obtain a set of candidate laying paths; the verification module 60 is used to verify the bending radius, traction force, and construction accessibility of the candidate laying paths to obtain a set of target candidate paths that meet the laying conditions; the recommended laying path acquisition module 70 is used to determine recommended laying paths from the set of target candidate paths according to preset path evaluation rules, and send the recommended laying paths to the construction management terminal.

[0069] Furthermore, the engineering layout information also includes the locations of existing pipelines, cable trays, cable trenches, equipment foundations, and construction access routes; the cable parameter information includes voltage level, cable outer diameter, weight per unit length, minimum allowable bending radius, and maximum allowable traction force.

[0070] Furthermore, the laying area division module 20 is used to perform the following operation steps: Acquire on-site scanning data of the area to be laid; perform coordinate unification processing on the on-site scanning data and engineering layout information, and then perform BIM modeling to construct a spatial model of the area to be laid; extract regional component data under a unified coordinate system based on the spatial model of the area to be laid; extract layable and non-layable areas based on the regional component data; perform grid processing on the layable areas to obtain multiple laying candidate units, wherein each laying candidate unit is configured with location coordinates, spatial dimensions, and the type of laying carrier to which it belongs.

[0071] Furthermore, the laying constraint analysis module 30 is used to perform the following operation steps: Based on the cable's outer diameter and minimum allowable bending radius, path turning constraints are determined; based on the weight per unit length and maximum allowable traction force, traction length constraints are determined; based on the voltage level, safety distance constraints between the cable and surrounding facilities are determined, wherein the surrounding facilities include, but are not limited to, existing pipelines, heat source equipment, high-voltage equipment, and maintenance access routes; the path turning constraints, traction length constraints, and safety distance constraints are mapped to the multiple laying candidate units respectively, and constraint identification information is generated based on the mapping results, wherein the constraint identification information includes layable identification, restricted laying identification, and prohibited laying identification.

[0072] Furthermore, the path cost assignment module 40 is used to perform the following operation steps: For laying candidate units with the laidable markings, a basic cost is assigned based on the laying distance, construction space, support utilization, and path straightness. For laying candidate units with the restricted laying markings, a penalty cost is added based on the type of restriction factor. For laying candidate units with the prohibited laying markings, an impassable cost is assigned. Based on the basic cost, penalty cost, and impassable cost, a comprehensive path cost for each laying candidate unit is generated. The laying candidate units are connected according to their adjacent unit relationships to obtain the laying cost map.

[0073] Furthermore, the types of limiting factors include at least one of the following: turning restrictions, narrow space restrictions, intersecting pipeline restrictions, proximity to heat sources restrictions, insufficient maintenance space restrictions, and construction equipment access restrictions.

[0074] Furthermore, the path search module 50 is used to perform the following operation steps: In the laying cost map, a starting node corresponding to the cable's starting point and a termination node corresponding to the cable's ending point are determined. Based on the starting and termination nodes, a path search is performed. During the path search, search branches corresponding to laying candidate units with prohibited laying indicators are eliminated, while search branches that meet the connectivity conditions are retained, resulting in multiple initial laying paths. Based on the comprehensive path cost of each laying candidate unit, a preset number of paths are selected from the multiple initial laying paths in ascending order of total path cost to form the candidate laying path set.

[0075] Furthermore, the verification module 60 is used to perform the following operation steps: Extract the turning nodes and adjacent path segments from each candidate laying path; calculate the actual bending radius of the path based on the turning nodes and adjacent path segments; compare the actual bending radius of the path with the minimum allowable bending radius to obtain the bending radius verification result; calculate the expected traction force based on the path length, number of turns, slope information, and weight per unit length of each candidate laying path; compare the expected traction force with the maximum allowable traction force to obtain the traction force verification result; perform construction access verification on each candidate laying path based on the width of construction equipment, the width of passage for workers, and the requirements for maintenance space, to obtain the construction access verification result; extract the candidate laying paths that pass all the bending radius verification results, traction force verification results, and construction access verification results, and add them to the target candidate path set.

[0076] Furthermore, the recommended laying path acquisition module 70 is used to perform the following operation steps: Calculate the path length evaluation value, number of turns evaluation value, construction difficulty evaluation value, support utilization evaluation value, and operation and maintenance convenience evaluation value for each target candidate path in the target candidate path set; calculate the path length evaluation value, number of turns evaluation value, construction difficulty evaluation value, support utilization evaluation value, and operation and maintenance convenience evaluation value according to preset weights to obtain the path comprehensive evaluation value; determine the target candidate path whose path comprehensive evaluation value meets the preset optimization conditions as the recommended laying path.

[0077] Through the foregoing detailed description of a method for intelligent laying path planning of power cables, those skilled in the art can clearly understand the intelligent laying path planning system for power cables in this embodiment. Since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and relevant parts can be referred to the method section.

[0078] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A method for intelligent laying path planning of power cables, characterized in that, The method includes: Obtain the engineering layout information of the area to be laid, as well as the cable parameter information of the cable to be laid; Based on the project layout information, a spatial model of the area to be laid is constructed, and the spatial model of the area to be laid is divided into laying areas to obtain multiple laying candidate units. Based on the cable parameter information, laying constraint analysis is performed on the multiple laying candidate units respectively to obtain the constraint identification information of each laying candidate unit; Based on the constraint identification information, path cost values ​​are assigned to the multiple laying candidate units to obtain a laying cost map; Based on the cable start-point and cable end-point locations in the engineering layout information, and combined with the laying cost map, a path search is performed to obtain a set of candidate laying paths. The set of candidate laying paths is checked for bending radius, traction force and construction accessibility to obtain a set of target candidate paths that meet the laying conditions. According to the preset path evaluation rules, a recommended laying path is determined from the target candidate path set, and the recommended laying path is sent to the construction management terminal.

2. The intelligent power cable laying path planning method as described in claim 1, characterized in that, The project layout information also includes the locations of existing pipelines, cable trays, cable trenches, equipment foundations, and construction access routes; The cable parameter information includes voltage level, cable outer diameter, weight per unit length, minimum allowable bending radius, and maximum allowable traction force.

3. The intelligent power cable laying path planning method as described in claim 1, characterized in that, Based on the project layout information, a spatial model of the area to be laid is constructed, and the spatial model is divided into laying areas to obtain multiple laying candidate units, including: Obtain on-site scanning data of the area to be laid; After unifying the coordinates of the on-site scanning data and engineering layout information, BIM modeling is performed to construct the spatial model of the area to be laid. Extract regional component data in a unified coordinate system based on the spatial model of the area to be laid; Based on the data of the regional components, extract the layable areas and the non-layable areas; The layable area is gridded to obtain multiple layable candidate units, wherein each layable candidate unit is configured with location coordinates, spatial dimensions, and the type of layable carrier to which it belongs.

4. The intelligent power cable laying path planning method as described in claim 2, characterized in that, Based on the cable parameter information, laying constraint analysis is performed on each of the multiple laying candidate units to obtain constraint identification information for each laying candidate unit, including: Determine the path turning constraints based on the cable outer diameter and the minimum allowable bending radius; The traction length constraint is determined based on the weight per unit length and the maximum allowable traction force; Based on the voltage level, a safety distance constraint is determined between the voltage level and surrounding facilities, wherein the surrounding facilities include, but are not limited to, existing pipelines, heat source equipment, high-voltage electrical equipment, and maintenance access routes. The path turning constraint, traction length constraint, and safety distance constraint are mapped to the multiple laying candidate units respectively, and the constraint identification information is generated according to the mapping results. The constraint identification information includes laying permit, restricted laying, and prohibited laying.

5. The intelligent power cable laying path planning method as described in claim 4, characterized in that, Based on the constraint identification information, path costs are assigned to the plurality of laying candidate units to obtain a laying cost map, including: For laying candidate units with the aforementioned layable markings, a foundation value is assigned based on the laying distance, construction space, support utilization, and path straightness. For laying candidate units with the aforementioned restricted laying identifier, a penalty value is added based on the type of restricted factor; Assign a non-passable value to the candidate laying unit with the aforementioned prohibited laying sign; Based on the basic cost, penalty cost, and impassable cost, the comprehensive path cost of each laying candidate unit is generated. By connecting each candidate laying unit according to the relationship between adjacent units, the laying cost map is obtained.

6. The intelligent power cable laying path planning method as described in claim 5, characterized in that, The types of limiting factors include at least one of the following: turning restrictions, narrow space restrictions, intersecting pipeline restrictions, proximity to heat sources restrictions, insufficient maintenance space restrictions, and construction equipment access restrictions.

7. The intelligent power cable laying path planning method as described in claim 5, characterized in that, Based on the cable start and end points of the aforementioned engineering layout information, and in conjunction with the laying cost map, a path search is performed to obtain a set of candidate laying paths, including: In the laying cost diagram, a starting node corresponding to the starting position of the cable and a termination node corresponding to the ending position of the cable are determined. Based on the starting node and the ending node, a path search is performed. During the path search process, the search branches corresponding to the laying candidate units with the prohibited laying mark are eliminated, and the search branches that meet the connectivity conditions are retained to obtain multiple initial laying paths. Based on the comprehensive path cost of each laying candidate unit, a preset number of paths are selected from the multiple initial laying paths in order of increasing total path cost to form the candidate laying path set.

8. The intelligent laying path planning method for power cables as described in claim 2, characterized in that, The set of candidate laying paths is checked for bending radius, traction force, and construction accessibility to obtain a set of target candidate paths that meet the laying conditions, including: Extract the turning nodes and adjacent path segments from each candidate laying path; Calculate the actual bending radius of the path based on the turning node and adjacent path segments; The actual bending radius of the path is compared with the minimum allowable bending radius to obtain the bending radius verification result; Calculate the expected traction force based on the path length, number of turns, gradient information, and weight per unit length for each candidate laying path; The expected traction force is compared with the maximum allowable traction force to obtain the traction force verification result; Based on the requirements for the width of construction equipment, the passage width of workers, and the reserved space for maintenance, a construction access check is performed on each candidate laying path to obtain the construction access check results; Extract the candidate laying paths that pass all the bending radius verification results, traction force verification results, and construction access verification results, and add them to the target candidate path set.

9. The intelligent power cable laying path planning method as described in claim 1, characterized in that, According to preset path evaluation rules, a recommended laying path is determined from the target candidate path set, and the recommended laying path is sent to the construction management terminal, including: Calculate the path length evaluation value, number of turns evaluation value, construction difficulty evaluation value, support utilization evaluation value, and operation and maintenance convenience evaluation value for each target candidate path in the target candidate path set. Based on preset weights, the path length evaluation value, the number of turns evaluation value, the construction difficulty evaluation value, the support utilization evaluation value, and the operation and maintenance convenience evaluation value are weighted and calculated to obtain the comprehensive path evaluation value. The target candidate path whose comprehensive evaluation value meets the preset optimization conditions is determined as the recommended laying path.

10. A smart power cable laying path planning system, characterized in that, The system is used to implement the intelligent laying path planning method for power cables according to any one of claims 1-9, the system comprising: The information acquisition module is used to acquire engineering layout information of the area to be laid, as well as cable parameter information of the cable to be laid; The laying area division module is used to construct a spatial model of the area to be laid based on the engineering layout information, and to divide the spatial model of the area to be laid into laying areas to obtain multiple laying candidate units. The laying constraint analysis module is used to perform laying constraint analysis on the multiple laying candidate units based on the cable parameter information, and obtain the constraint identification information of each laying candidate unit. The path cost assignment module is used to assign path costs to the multiple laying candidate units according to the constraint identification information to obtain a laying cost map. The path search module is used to perform path search based on the cable start-up location and cable end-up location in the engineering layout information, combined with the laying cost map, to obtain a set of candidate laying paths. The verification module is used to verify the bending radius, traction force and construction access of the candidate laying path set to obtain the target candidate path set that meets the laying conditions. The recommended laying path acquisition module is used to determine the recommended laying path from the target candidate path set according to the preset path evaluation rules, and send the recommended laying path to the construction management terminal.

Images