A GIS-based simulation system for tension-laying of power transmission lines

Abstract

The invention relates to the technical field of computer systems, and in particular to a transmission line tension pay-out simulation system based on GIS, comprising a system loading and initialization module, an interactive GIS interface module, a database module, a data processing module, a 3D view module, and a computer-aided design module; an implementation method comprises: first, starting the system and initializing resources; then, loading the interactive GIS interface and capturing user operations as well as data retrieval and information integration; obtaining design data of a transmission line tower based on design input data of the transmission line, performing advanced data processing on the design data, and constructing and selecting a model; finally, performing simulation calculation based on the selected model, adjusting and optimizing parameters based on the simulation result, and then using the optimized and adjusted parameters to render and display a 3D view, thereby solving the technical problems of slow data processing speed in the prior art, failure to meet the requirements of real-time simulation, and low accuracy of the simulation model.

Description

Technical Field

[0001] The invention relates to the technical field of computer systems, and in particular to a transmission line tension pay-out simulation system based on GIS. Background Art

[0002] With the development of power systems, the construction and maintenance of transmission lines have become an important part of power systems. In order to ensure the safety and stable operation of transmission lines, it is necessary to simulate the tension and release of transmission lines. Traditional tension and release simulation methods are mainly based on mathematical models and physical principles, but these methods have certain limitations when dealing with the tension and release of transmission lines under complex terrain and environmental conditions. In recent years, geographic information system (GIS) technology has been widely used in power systems. GIS technology can provide rich geographic information data, such as terrain, landform, meteorological conditions, etc. These data are crucial for the tension and release simulation of transmission lines. Therefore, a GIS-based transmission line tension and release simulation system came into being.

[0003] There are many studies on the simulation of tension wire laying of transmission lines. The application number proposed by Xin Xiaoyu et al. is "CN202111489676.8", and the name of the invention is "A transmission line tension wire laying simulation system based on three-dimensional GIS", which mainly includes: tension wire laying algorithm model library, bionic database, tensioning site simulation site selection, calculation verification and simulation, and construction scheme optimization design. The beneficial effects of this invention are: realizing the auxiliary selection of tensioning sites in the tension wire laying construction of transmission lines; realizing the calculation verification of tension wire laying of wire sections; realizing line tension wire laying simulation through three-dimensional visualization, providing construction management personnel with an intuitive and visual tension wire laying calculation platform; realizing integrated application with existing construction scheme verification simulation.

[0004] However, the above technology has at least the following technical problems: slow data processing speed, which cannot meet the needs of real-time simulation, and low accuracy of the simulation model. Summary of the invention

[0005] The embodiment of the present application provides a GIS-based transmission line tension pay-out simulation system, which solves the technical problems of slow data processing speed in the prior art, inability to meet the needs of real-time simulation, and low accuracy of the simulation model, and realizes the optimized design of the transmission line tower and the optimal transmission line parameter configuration.

[0006] The present application provides a GIS-based transmission line tension wire laying simulation system, which specifically includes the following technical solutions:

[0007] A GIS-based transmission line tension pay-out simulation system includes the following parts:

[0008] System loading and initialization module, interactive GIS interface module, database module, data processing module, 3D view module, computer-aided design module;

[0009] The system loading and initialization module is responsible for starting the system, loading necessary programs and data, and initializing the system based on system configuration information, user settings, and initialization parameters, thereby providing an initialized operating environment for other modules.

[0010] The interactive GIS interface module provides an interactive GIS interface based on touch screen technology, receives the user's operation instructions, analyzes the user's operation instructions, sends the analyzed operation instructions to the computer-aided design module, displays the computer-aided design module results on the interface, and is connected with the 3D view module to display the 3D effect in real time;

[0011] The database module stores geographic information, meteorological conditions, and transmission line parameter data, and provides a retrieval function to provide the data processing module with the required data;

[0012] The data processing module performs high-level data processing on the geographic information, meteorological conditions, transmission line parameter data of the database module and the design data of the computer-aided design module, and transmits the processed optimized data to the 3D viewing module;

[0013] The 3D view module provides a simulation effect of a three-dimensional perspective based on the data processed by the data processing module, and displays it on the interactive GIS interface module;

[0014] The computer-aided design module designs and modifies the transmission line based on the user design input of the interactive GIS interface module, and provides the design data to the data processing module for simulation.

[0015] A GIS-based transmission line tension wire laying simulation method comprises the following steps:

[0016] S1. System startup and resource initialization;

[0017] S2. Load the interactive GIS interface and capture user operations as well as perform data retrieval and information integration;

[0018] S3. Based on the design input data of the transmission line, obtain the design data of the transmission line tower by computer-aided design, and feed the design data back to the data processing module in real time for advanced data processing, and build a model and select a model based on the advanced data processing results;

[0019] S4. Perform simulation calculations based on the selected model, adjust and optimize parameters based on the simulation results, and then use the optimized and adjusted parameters to render and display the 3D view.

[0020] Preferably, the step S2 specifically includes:

[0021] After the data retrieval is completed, the data is integrated and formatted to obtain integrated and formatted data.

[0022] Preferably, the step S3 specifically includes:

[0023] When preprocessing the formatted data, different characteristics of the data are used for classification processing.

[0024] Preferably, in step S3, it further includes:

[0025] Select the optimized tension-payout model based on the type of transmission line and user design requirements.

[0026] Preferably, in step S3, it further includes:

[0027] The process of constructing the optimized tension-payoff model is as follows:

[0028] Firstly, based on the physical properties of the wire, a stress-strain relationship is established, and then a dynamic response model is established. The dynamic response model describes the dynamic response of the transmission line under the external load of meteorological factors. Then, nonlinear characteristics are introduced to describe the nonlinear relationship between the tension and the length of the line. The matrix is ​​used to describe the spatial distribution of the line. Finally, the model is integrated to obtain a complete optimized tension-line-paying model.

[0029] Preferably, the step S4 specifically includes:

[0030] The simulation calculation is performed based on the selected optimized tension-line pay-out model, and the optimization adjustment model is constructed based on the simulation results and the design data of the transmission line tower to adjust and optimize the parameters, and then the optimized and adjusted parameters are used for 3D view rendering and display.

[0031] Preferably, in step S4, it further includes:

[0032] When performing parameter adjustment and optimization, an optimization adjustment model is constructed. The optimization adjustment model establishes an objective function based on minimizing the sum of tension and stability, uses influencing factors to determine constraints, and then adjusts parameters through the gradient descent method to minimize the objective function and obtain the optimal parameter value; the transmission line tension and wire laying are adjusted according to the optimal parameter value to obtain the optimal simulation result.

[0033] Preferably, in step S4, it further includes:

[0034] Based on the optimal parameters of the optimal simulation result, 3D view rendering and display are performed.

[0035] Beneficial effects:

[0036] The multiple technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0037] 1. This application realizes the optimized design of transmission line towers through computer-aided design based on the mechanical principles of physics, the principles of structural engineering and the principles of engineering aesthetics, and obtains the tower height, width, shape and detailed design drawings that meet the engineering requirements, thereby improving the design quality and efficiency of transmission line towers; performs advanced data processing on the design data through the data processing module to optimize the data parameters and provide accurate data support for model construction and model selection; establishes an optimized tension-line-laying model to comprehensively describe the working state of the transmission line in a complex environment, taking into account the physical characteristics, dynamic response, nonlinear characteristics, spatial distribution and stability of the line, and other aspects, to provide strong support for the design and analysis of the transmission line.

[0038] 2. This application performs preliminary tension and line-laying simulation calculations by inputting terrain parameters, meteorological parameters and transmission line parameters to obtain accurate simulation calculation results, ensure the safety of the line, build an optimization adjustment model, establish an objective function based on minimizing the sum of tension and stability, adjust parameters through the gradient descent method, and achieve the optimal transmission line parameter configuration.

[0039] 3. The technical solution of the present application can effectively solve the technical problems of slow data processing speed, inability to meet the needs of real-time simulation, and low accuracy of simulation models. Through computer-aided design, based on the mechanical principles of physics, the principles of structural engineering, and the principles of engineering aesthetics, the optimized design of the transmission line tower is realized, and the tower height, width, shape, and detailed design drawings that meet the engineering requirements are obtained, thereby improving the design quality and efficiency of the transmission line tower; the design data is subjected to advanced data processing by the data processing module to optimize the data parameters and provide accurate data support for model construction and model selection; an optimized tension-line-setting model is established to comprehensively describe the working state of the transmission line in a complex environment, taking into account the physical characteristics, dynamic response, nonlinear characteristics, spatial distribution, and stability of the line, and providing strong support for the design and analysis of the transmission line; by inputting terrain parameters, meteorological parameters, and transmission line parameters, preliminary tension-line-setting simulation calculations are performed to obtain accurate simulation calculation results to ensure the safety of the line, and an optimization adjustment model is constructed to establish an objective function based on minimizing the sum of tension and stability, and the parameters are adjusted by the gradient descent method to achieve the optimal transmission line parameter configuration. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is a module diagram of the GIS-based transmission line tension pay-out simulation system described in this application;

[0041] Figure 2 This is a flow chart of the GIS-based transmission line tension pay-out simulation method described in this application. DETAILED DESCRIPTION

[0042] The embodiment of the present application provides a GIS-based transmission line tension pay-out simulation system to solve the technical problems in the prior art of slow data processing speed, failure to meet the requirements of real-time simulation, and low accuracy of the simulation model. The overall idea is as follows:

[0043] First, the system is started and resources are initialized; then, the interactive GIS interface is loaded and user operations are captured as well as data retrieval and information integration is performed; then, based on the design input data of the transmission line, the design data of the transmission line tower is obtained by computer-aided design, and the design data is fed back to the data processing module in real time for advanced data processing, and the model is constructed and selected based on the data processing results; finally, simulation calculations are performed based on the selected model, and parameter adjustment and optimization are performed based on the simulation results, and the optimized and adjusted parameters are used for 3D view rendering and display; through computer-aided design, based on the mechanical principles of physics, the principles of structural engineering and the principles of engineering aesthetics, the optimal design of the transmission line tower is realized, and the tower height, width, shape and detailed design drawings that meet the engineering requirements are obtained, so as to Improve the design quality and efficiency of transmission line towers; perform advanced data processing on design data through the data processing module to optimize data parameters and provide accurate data support for model building and model selection; establish an optimized tension-line-setting model to comprehensively describe the working status of transmission lines in complex environments, taking into account the physical characteristics, dynamic response, nonlinear characteristics, spatial distribution and stability of the lines, and provide strong support for the design and analysis of transmission lines; perform preliminary tension-line-setting simulation calculations by inputting terrain parameters, meteorological parameters and transmission line parameters to obtain accurate simulation calculation results to ensure the safety of the line, build an optimization adjustment model, establish an objective function based on minimizing the sum of tension and stability, adjust parameters through the gradient descent method, and achieve the optimal transmission line parameter configuration.

[0044] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0045] Refer to the attached Figure 1 The present application discloses a GIS-based transmission line tensioning simulation system, which includes the following parts:

[0046] System loading and initialization module, interactive GIS interface module, database module, data processing module, 3D view module, computer-aided design module;

[0047] The system loading and initialization module is responsible for starting the system, loading necessary programs and data, and initializing the system based on system configuration information, user settings, and initialization parameters, providing an initialized operating environment for other modules, providing basic support, and ensuring the normal operation of the system;

[0048] The interactive GIS interface module provides an interactive GIS interface based on touch screen technology, receives the user's operation instructions, analyzes the user's operation instructions, sends the analyzed operation instructions to the computer-aided design module, and displays the computer-aided design module results on the interface, and is connected with the 3D view module to display the 3D effect in real time;

[0049] The operation instructions, such as click, drag, and zoom;

[0050] The database module stores data such as geographic information, meteorological conditions, and transmission line parameters, and provides an efficient retrieval function to provide the data processing module with the required data;

[0051] The data processing module performs high-level data processing on the geographic information, meteorological conditions, transmission line parameters and other data of the database module and the design data of the computer-aided design module, and transmits the processed optimized data to the 3D view module;

[0052] The 3D view module provides a simulation effect of a three-dimensional perspective based on the data processed by the data processing module, and displays it on the interactive GIS interface module;

[0053] The computer-aided design module designs and modifies the transmission line based on the user design input of the interactive GIS interface module, and provides the design data to the data processing module for simulation;

[0054] The present application discloses a GIS-based transmission line tension wire laying simulation method, comprising the following steps:

[0055] S1. System startup and resource initialization;

[0056] When the GIS-based transmission line tension payout simulation system is started, the specified system configuration file path will be located first, and the file stream processing technology will be used to open and parse the configuration file content, and the key configuration parameters will be extracted from it. To ensure the accuracy of the configuration, the configuration parameters will be checked for validity using regular expression matching technology. Next, the required memory and processor resources will be determined based on the parsed configuration parameters, and the resources will be applied for by calling the operating system-level API. During the resource application process, the resource management algorithm will be used to check whether the resource application is successful, and error handling or resource recycling will be performed when necessary to ensure the correct allocation of resources. Subsequently, external resources such as fonts, icons, and interface templates will be loaded according to the external resource path. To ensure the integrity and availability of the resources, the loaded resources will be checked for integrity using hash verification technology. Once the verification passes, the resources will be stored in the memory and prepared for subsequent use. After the resources are loaded, the database module connection will be initialized, and the database connection pool technology will be used to try to establish a connection based on the extracted database connection information. To ensure the stability of the connection, the ping command and SQL query will be used to perform a connection test. After the connection is successfully established, the database connection pool will be initialized using the connection pool management technology to prepare for subsequent data queries and operations.

[0057] Finally, conduct a comprehensive environment check to ensure that all system resources, external resources, and database connections are ready and available. Use performance monitoring tools to perform self-checks, such as checking memory leaks and processor usage, to ensure stable system operation. If any problems are found during the self-check, the system will record error logs and send reminders to users. Use the log management system to record errors.

[0058] The above steps ensure that all necessary resources and connections can be correctly initialized at startup, providing a stable and reliable environment for subsequent operations;

[0059] S2. Load the interactive GIS interface and capture user operations as well as perform data retrieval and information integration;

[0060] First, in preparation for loading the GIS interface, the resource management algorithm is used to check resources to ensure that there is enough memory and processing power. Then, the necessary GIS libraries and dependencies are loaded through the dynamic link library technology. At the same time, the map rendering algorithm is used to determine the default view range and level of the map. Then, the appropriate interface template is selected according to the preset, and the map data is loaded through the map data stream technology. The map data may include basic maps, satellite maps, and topographic maps. The default interface elements, such as zoom buttons, direction controls, and layer selectors, are displayed one by one.

[0061] After the interface is successfully loaded, it starts to monitor all user operations on the GIS interface, including monitoring the user's mouse and touch operations, such as click, drag, double-click, etc., and capturing the user's keyboard input, such as search box input, shortcut keys, etc. For the subsequent function implementation, the user's operation history is recorded;

[0062] When users perform operations, these operations are classified using operation attributes, such as map operations, data queries, and design inputs; map operations, such as zooming, moving, and rotating, are directly responded to on the GIS interface, while for data queries or design inputs, these operations are converted into specific data query requests;

[0063] Finally, the user's operation instructions and data query requests are generated. The operation instructions tell the system the purpose of the user's operation, such as viewing detailed information of a certain area, adding a new transmission line, etc. When the user wants to query certain specific data, the system will generate a data query request, which will be sent to the database module. When the database module receives the data query request, the data query request may involve geographic location, time range, and specific line parameters. For the query request, first use regular expression matching technology to parse it to ensure that the format and content of the request are in line with expectations. Then, use natural language processing technology to identify the keywords or parameters therein, and determine the query target based on the keywords or parameters, such as whether to query geographic information, meteorological conditions or transmission line parameters. In order to ensure the accuracy of the query, each query target will set a default query range based on the empirical method, such as the default query of the meteorological conditions in the past week;

[0064] Next, we build database query statements based on the parsed query requests, and use the SQL builder to ensure the correctness and efficiency of the query statements. After executing these query statements, we obtain the required data from the database. In order to ensure the integrity and accuracy of the data, we use the data verification algorithm to perform preliminary verification on these query results.

[0065] After the data retrieval is completed, the data integration and formatting begins. For example, the geographic information and meteorological conditions are matched to ensure that they are at the same time and place. The integrated data is formatted using a data conversion tool and converted into the data format required for subsequent processing. In order to ensure the continuity and consistency of the data, the formatted data is further verified using a data consistency check tool.

[0066] Finally, integrated and formatted data, such as geographic information, meteorological conditions, transmission line parameters and other data, are obtained, and the data are used as input data for the design of the transmission line to provide data support for the computer-aided design module and the data processing module;

[0067] S3. Based on the design input data of the transmission line, obtain the design data of the transmission line tower by computer-aided design, and feed the design data back to the data processing module in real time for advanced data processing, and build a model and select a model based on the advanced data processing results;

[0068] S31.Computer-aided design

[0069] Based on the design data obtained in the above steps, the required height, width and shape of the transmission line tower are determined based on the mechanical principles of physics, the principles of structural engineering and the principles of engineering aesthetics. Then, based on the height, width and shape of the transmission line tower and the design parameters of the transmission line, the details of the tower are designed using the knowledge of structural engineering to obtain a detailed design drawing of the tower, wherein the details may include beams, columns and connectors. Based on the detailed design drawing of the tower, a design drawing of the transmission line tower is generated using a drawing tool. Meanwhile, the design data of the transmission line tower in the design process is acquired, and the design data is sent to a data processing module to optimize the data parameters.

[0070] S32. Data preprocessing;

[0071] First, the formatted data is preprocessed. For example, for discrete terrain elevation data points, the Kriging interpolation algorithm is used for processing. The algorithm takes into account the spatial relationship between data points, so that the terrain characteristics can be more accurately described and continuous terrain grid data can be generated. For the tower position input by the user, the corresponding elevation value is extracted from the grid data using the bilinear interpolation method. In order to more accurately describe the terrain characteristics, terrain analysis techniques such as terrain curvature calculation are used to identify and mark key terrain points, such as mountain tops, valleys, and river intersections. For meteorological data, the time series analysis method is used to screen the parameters related to the transmission line from the historical and real-time meteorological data provided by the meteorological station, such as wind speed, temperature, humidity, and precipitation. Then, according to the tower position and the spatial distribution of meteorological data, spatial interpolation is performed to obtain the meteorological parameters of each tower position.

[0072] Finally, the transmission line characteristics are determined for the original parameters of the transmission line, such as wire type, wire cross section, preset tension, design load, etc. The characteristics use database query technology, such as searching for relevant physical and mechanical properties such as conductivity, elastic modulus, and breaking strength according to the wire type. Then, in order to ensure that the original parameters are compatible with other data, the unit conversion algorithm is used for unit conversion and standardization.

[0073] S33. Model construction and selection;

[0074] According to the type of transmission line obtained in the above process and the user's design requirements, a suitable optimized tension-wire-setting model is selected. The construction process of the optimized tension-wire-setting model is as follows:

[0075] First, based on the physical properties of the wire, a stress-strain relationship is established. The relationship is used to describe the physical properties of the wire. The elastic modulus of the wire is not only related to temperature, but also to stress, strain, frequency, terrain and meteorological factors. The terrain will affect the tension distribution of the line, while meteorological factors such as temperature, humidity, wind speed, etc. will affect the physical properties of the wire. The specific formula is as follows:

[0076] σ=E(∈,T0,f,H,W)×∈

[0077] Among them, E(·) is the elastic modulus, which is a function related to strain, temperature, frequency, terrain parameters and meteorological parameters; it is obtained from the standard property table of the material; σ represents stress, which is the internal force generated inside the wire due to the external load; ∈ represents strain, which describes the degree of deformation of the wire and is measured by a strain gauge; T0 is temperature, which is the ambient temperature around the line and is measured by a temperature sensor; f is the frequency of the external load, which describes the speed of change of the external load and is obtained by a spectrum analyzer measurement device; H is a set of terrain parameters; W represents a set of meteorological parameters;

[0078] Furthermore, a dynamic response model is established, which describes the dynamic response of the transmission line under the external load of meteorological factors. The specific formula is as follows:

[0079]

[0080] Among them, m(H) is the mass of the line, which describes the material content of the line and is calculated from the line parameters and terrain parameters; c(W) is the damping coefficient, which describes the energy loss of the line when it vibrates; k is the stiffness coefficient, which describes the rigidity of the line, that is, the degree of deformation of the line after being subjected to external loads, which is obtained from the design parameters of the line; F(t,W) is the external load, which describes the external force acting on the line due to meteorological factors; y is the displacement, which describes the distance moved by the object from the static state to the current state, which is measured by the displacement sensor; t is the time; It is expressed as the second derivative of the displacement y of the object, as the acceleration of the object; It is expressed as the first derivative of the displacement y of the object, as the velocity of the object;

[0081] Furthermore, nonlinear characteristics are introduced to describe the nonlinear relationship between line tension and line length. The specific formula is as follows:

[0082]

[0083] Among them, a, b, c are nonlinear coefficients, which describe the nonlinear relationship between the tension and the length of the line, and are obtained by fitting the experimental data; N is the nonlinear index, which describes the degree of the nonlinear relationship, and is obtained by fitting the experimental data; T(L) is the tension under the length of the line, which describes the internal force generated by the external load of the line; L is the length of the line, which describes the actual length of the line after being subjected to the external load, and the real-time length of the line is obtained by on-site measurement;

[0084] Furthermore, a matrix is ​​used to describe the spatial distribution of the lines. The specific formula is as follows:

[0085] X=A(H,W)L

[0086] Among them, X is the spatial distribution matrix of the line, which describes the position and shape of the line in space; A(H,W) is the coefficient matrix, which is related to terrain parameters and meteorological parameters, and describes the relationship between the spatial distribution of the line and the length of the line, which is obtained by fitting through mathematical modeling;

[0087] Further, the stability condition of the line is described, and the specific formula is expressed as follows:

[0088]

[0089] Among them, L max is the maximum laying length of the line, which describes the laying length of the line under the limit state; T max is the maximum tension of the line, which describes the tension of the line under the limit state; at the same time, it is limited to T(L)≤T max

[0090] Finally, the model is integrated to obtain a complete optimized tension-payout model. The specific formula is as follows:

[0091]

[0092] Where T(L,T,f) represents the tension at a given pay-off length L, temperature T and frequency f;

[0093] Through the above complete construction process, an in-depth and accurate optimization tension-line payout model is obtained. The model not only describes the working state of the transmission line in a complex environment, but also considers the physical characteristics, dynamic response, nonlinear characteristics, spatial distribution and stability of the line, providing strong support for subsequent design and analysis.

[0094] According to the above steps, the type of transmission line and the user's design requirements are experimentally simulated using existing technology to obtain the parameters of the above-mentioned optimized tension-wire-release model, so as to select a suitable optimized tension-wire-release model;

[0095] This application uses computer-aided design to achieve optimal design of transmission line towers based on the mechanical principles of physics, the principles of structural engineering, and the principles of engineering aesthetics, and obtains tower height, width, shape, and detailed design drawings that meet engineering requirements, thereby improving the design quality and efficiency of transmission line towers; performs advanced data processing on design data through a data processing module to optimize data parameters and provide accurate data support for model construction and model selection; establishes an optimized tension-line-laying model to comprehensively describe the working state of transmission lines in complex environments, taking into account multiple aspects such as the physical characteristics, dynamic response, nonlinear characteristics, spatial distribution, and stability of the line, and providing strong support for the design and analysis of transmission lines.

[0096] S4. Perform simulation calculation based on the selected model, adjust and optimize parameters based on the simulation results, and then use the optimized parameters to render and display the 3D view;

[0097] S41. Simulation calculation;

[0098] Using the selected mathematical model, inputting terrain parameters, meteorological parameters and transmission line parameters, and performing preliminary tension-line laying simulation calculations, the terrain parameters are such as height and slope; the meteorological parameters are such as wind speed and temperature; the parameters are input into the selected optimized tension-line laying mathematical model to obtain the tension calculation result, and the calculated tension is compared with the maximum line laying length allowed under the stability condition of the line. If it is greater than the maximum line laying length, the line is unsafe; by bringing the variation range of the meteorological parameters, i.e., the maximum and minimum values ​​and other parameters, into the selected optimized tension-line laying mathematical model, the variation range of the tension is obtained, and the variation range is set according to the expert experience method. If it exceeds, it is considered that the variation range of the tension is too large and the line is unstable;

[0099] S42. Parameter adjustment and optimization;

[0100] In order to further adjust and optimize the design parameters, an optimization adjustment model is constructed, specifically:

[0101] The objective function is established based on minimizing the sum of tension and stability. The specific formula can be expressed as:

[0102]

[0103] Where Z is the objective function to be minimized, representing the overall system performance; α and β are weight factors used to balance the importance of tension and stability, with a value range of [0,1]; l lUne is the length of the transmission line; a lUne is the cross-sectional area of ​​the transmission line; σ lUne is the material conductivity of the transmission line; T lUneis the tension in the transmission line; It represents the integral of the tension over the entire pay-off length, representing the total tension; represents the root mean square of multiple stability deviations, representing the overall stability, δ U (·) is the ith stability deviation;

[0104] Constraints:

[0105]

[0106] Among them, T(T lUne )≤T max Indicates tension constraint. The tension does not exceed the maximum allowable value. T max is the maximum allowable tension; 0≤L lUne ≤L max Indicates the length constraint of the wire release. The wire release length is within the allowable range. L max is the maximum allowable pay-out length; δ(L lUne ,T lUne ,f,H,W,A lUne ,σ lUne ) represents the stability constraint, the stability deviation does not exceed the maximum allowable value, δ max is the maximum stability deviation allowed; (L lUne ,T lUne ,f,H,W,A lUne ,σ lUne )≤θ max Indicates the addition of a torsion angle constraint. The torsion angle does not exceed the maximum allowable value. θ is the torsion angle. max is the maximum permissible torsion angle; is the resistance constraint of the transmission line, the resistance shall not exceed the maximum allowable value; U lUne =I lUne ×R lUne ≤U max is the voltage drop constraint of the transmission line, the voltage drop does not exceed the maximum allowable value; other represents other constraints; R lUne is the bending radius of the transmission line; I lUne is the current on the transmission line; U lUne is the voltage on the transmission line; R max is the maximum resistance allowed; U max is the maximum voltage allowed;

[0107] Then, the parameters are adjusted by the gradient descent method to minimize the objective function and obtain the optimal parameter value; the tension and release of the transmission line are adjusted according to the optimal parameter value to obtain the optimal simulation result;

[0108] S43.3D view rendering and display;

[0109] Firstly, based on the optimal parameters of the optimal simulation results obtained by the data processing module, a stereoscopic vision comprehensive construction method is adopted to construct a complete three-dimensional simulation environment, including the integration of terrain, buildings and other elements, and then enter the rendering stage of the 3D model. A series of rendering parameters such as lighting, shadows, and materials are set according to user preferences. Then, a multi-dimensional image parser and an efficient rendering engine are used to convert the three-dimensional model into visual image data. After obtaining the image data, the dynamic resource optimization management algorithm is used to check and ensure that there is sufficient memory and processing power, and the image data is transmitted to the interactive GIS interface module. Finally, the user will see the complete 3D view rendering effect on the GIS interface, and can view the three-dimensional simulation effects of different perspectives and positions through interactive operations, so as to obtain richer and more intuitive information and realize 3D view rendering and display.

[0110] This application performs preliminary tension and line-laying simulation calculations by inputting terrain parameters, meteorological parameters, and transmission line parameters to obtain accurate simulation calculation results, ensure the safety of the line, build an optimization adjustment model, establish an objective function based on minimizing the sum of tension and stability, adjust parameters through the gradient descent method, and achieve the optimal transmission line parameter configuration.

[0111] In summary, the GIS-based transmission line tension pay-out simulation system described in this application has been completed.

[0112] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0113] 1. This application realizes the optimized design of transmission line towers through computer-aided design based on the mechanical principles of physics, the principles of structural engineering and the principles of engineering aesthetics, and obtains the tower height, width, shape and detailed design drawings that meet the engineering requirements, thereby improving the design quality and efficiency of transmission line towers; performs advanced data processing on the design data through the data processing module to optimize the data parameters and provide accurate data support for model construction and model selection; establishes an optimized tension-line-laying model to comprehensively describe the working state of the transmission line in a complex environment, taking into account the physical characteristics, dynamic response, nonlinear characteristics, spatial distribution and stability of the line, and other aspects, to provide strong support for the design and analysis of the transmission line.

[0114] 2. This application performs preliminary tension and line-laying simulation calculations by inputting terrain parameters, meteorological parameters and transmission line parameters to obtain accurate simulation calculation results, ensure the safety of the line, build an optimization adjustment model, establish an objective function based on minimizing the sum of tension and stability, adjust parameters through the gradient descent method, and achieve the optimal transmission line parameter configuration.

[0115] Effect research:

[0116] The technical solution of the present application can effectively solve the technical problems of slow data processing speed, failure to meet the needs of real-time simulation, and low accuracy of simulation models. In addition, the above-mentioned system or method has undergone a series of effect surveys. Through computer-aided design, based on the mechanical principles of physics, the principles of structural engineering, and the principles of engineering aesthetics, the optimized design of the transmission line tower is realized, and the tower height, width, shape, and detailed design drawings that meet the engineering needs are obtained, thereby improving the design quality and efficiency of the transmission line tower; the design data is subjected to advanced data processing by the data processing module to optimize the data parameters and provide accurate data support for model construction and model selection; an optimized tension-line-setting model is established to comprehensively describe the working state of the transmission line in a complex environment, taking into account the physical characteristics, dynamic response, nonlinear characteristics, spatial distribution, stability, and other aspects of the line, and providing strong support for the design and analysis of the transmission line; by inputting terrain parameters, meteorological parameters, and transmission line parameters, preliminary tension-line-setting simulation calculations are performed to obtain accurate simulation calculation results to ensure the safety of the line, and an optimization adjustment model is constructed. The objective function is established based on minimizing the sum of tension and stability, and the parameters are adjusted by the gradient descent method to achieve the optimal transmission line parameter configuration.

[0117] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0118] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0119] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0120] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A GIS-based transmission line tension pay-out simulation method, characterized in that: The following steps are involved: S1. System startup and resource initialization; S2. Load the interactive GIS interface and capture user operations as well as perform data retrieval and information integration; S3. Based on the design input data of the transmission line, the design data of the transmission line tower is obtained by computer-aided design, and the design data is fed back to the data processing module in real time for advanced data processing, and a model is constructed and selected based on the advanced data processing results; according to the type of transmission line and the user's design requirements, an optimized tension-setting model is selected; the construction process of the optimized tension-setting model is as follows: First, based on the physical properties of the wire, the stress-strain relationship is established, and then a dynamic response model is established. The dynamic response model describes the dynamic response of the transmission line under the external load of meteorological factors. Then, nonlinear characteristics are introduced to describe the nonlinear relationship between the tension and the length of the line. The matrix is ​​used to describe the spatial distribution of the line. Finally, the model is integrated to obtain a complete optimized tension-line-laying model. The specific formula is as follows: Where, T(L, T, f, H, W) represents the tension at a given laying length L, temperature T, frequency f, terrain parameters and meteorological parameters W; E(·) is the elastic modulus, which is a function related to strain, temperature, frequency, terrain parameter H and meteorological parameters; ∈ represents strain; m(H) is the mass of the line; Expressed as the second derivative of the object's displacement y; It is expressed as the first-order derivative of the displacement y of the object; c(W) is the damping coefficient; k is the stiffness coefficient; y is the displacement; a, b, c are the nonlinear coefficients; n is the nonlinear index; L is the length of the wire; A(H, W) is the coefficient matrix; S4. Perform simulation calculation based on the selected optimized tension-line-paying model, and construct an optimization adjustment model based on the simulation results and the design data of the transmission line tower to perform parameter adjustment and optimization. When performing parameter adjustment and optimization, construct an optimization adjustment model, which establishes an objective function based on minimizing the sum of tension and stability. The specific formula is expressed as follows: Among them, Z is the objective function to be minimized; α and β are weight factors; L line is the length of the transmission line; A line is the cross-sectional area of ​​the transmission line; σ line is the material conductivity of the transmission line; T line is the tension in the transmission line; It represents the integral of the tension over the entire pay-off length; represents the root mean square of multiple stability deviations, δ i (·) is the ith stability deviation; The constraints are determined by using the influencing factors, and then the parameters are adjusted by the gradient descent method to minimize the objective function and obtain the optimal parameter value; the tension and release of the transmission line are adjusted according to the optimal parameter value to obtain the optimal simulation result; Based on the optimal parameters of the optimal simulation result, 3D view rendering and display are performed.

2. The GIS-based transmission line tension pay-out simulation method according to claim 1, characterized in that: The step S2 specifically includes: After the data retrieval is completed, the data is integrated and formatted to obtain integrated and formatted data.

3. The GIS-based transmission line tension pay-out simulation method according to claim 1, characterized in that: The step S3 specifically includes: When preprocessing the formatted data, different characteristics of the data are used for classification processing.

4. A GIS-based transmission line tension wire-laying simulation system, applied to a GIS-based transmission line tension wire-laying simulation method as claimed in claim 1, characterized in that: Includes the following parts: System loading and initialization module, interactive GIS interface module, database module, data processing module, 3D view module, computer-aided design module; The system loading and initialization module is responsible for starting the system, loading necessary programs and data, and initializing the system based on system configuration information, user settings, and initialization parameters, thereby providing an initialized operating environment for other modules. The interactive GIS interface module provides an interactive GIS interface based on touch screen technology, receives the user's operation instructions, analyzes the user's operation instructions, sends the analyzed operation instructions to the computer-aided design module, displays the computer-aided design module results on the interface, and is connected with the 3D view module to display the 3D effect in real time; The database module stores geographic information, meteorological conditions, and transmission line parameter data, and provides a retrieval function to provide the data processing module with the required data; The data processing module performs high-level data processing on the geographic information, meteorological conditions, transmission line parameter data of the database module and the design data of the computer-aided design module, and transmits the processed optimized data to the 3D viewing module; The 3D view module provides a simulation effect of a three-dimensional perspective based on the data processed by the data processing module, and displays it on the interactive GIS interface module; The computer-aided design module designs and modifies the transmission line based on the user design input of the interactive GIS interface module, and provides the design data to the data processing module for simulation.

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