Power cable withstand voltage evaluation method and device based on virtual simulation and medium

Abstract

The embodiment of the invention discloses a power cable withstand voltage evaluation method and device based on virtual simulation and a medium, and relates to the technical field of power cables, and the method comprises the steps: obtaining an operation process data set corresponding to an ultra-low frequency AC withstand voltage test through a big data technology, so as to determine a corresponding operation process task node sequence, acquiring cable structure data of the to-be-evaluated power cable and test equipment data corresponding to the ultralow frequency test equipment to construct a corresponding cable model and a test equipment model corresponding to the ultralow frequency test equipment; determining cable environment data of the to-be-evaluated power cable to establish a corresponding withstand voltage test virtual scene, and obtaining interaction action information of a test user in the withstand voltage test virtual scene; and performing test operation evaluation on the interaction action information based on the operation process task node sequence, and when a preset requirement is met, collecting simulation test parameters of the to-be-evaluated power cable, so as to determine a withstand voltage evaluation result of the to-be-evaluated power cable based on the simulation test parameters.

Description

Technical Field

[0001] The present invention relates to the technical field of power cables, and in particular to a method, device and medium for evaluating the withstand voltage of power cables based on virtual simulation. Background Art

[0002] In the power system, the safe and stable operation of 10kv power cables is of vital importance. In order to ensure that the insulation performance of power cables meets the requirements, regular withstand voltage tests are required. Traditional 10kv power cable withstand voltage tests usually use DC withstand voltage tests or power frequency AC withstand voltage tests. However, DC withstand voltage tests have a cumulative damage effect on cable insulation, while power frequency AC withstand voltage tests require larger test equipment and sites, are more expensive, and are complex to operate. With the development of technology, the 0.1Hz ultra-low frequency AC withstand voltage test method has gradually been applied to the withstand voltage test of 10kv power cables. The 0.1Hz ultra-low frequency AC withstand voltage test has the advantages of light test equipment, less damage to cable insulation, and high test efficiency. However, in the actual 0.1Hz AC withstand voltage test, due to the high test voltage and complex operation process, the technical level and experience of the test personnel are required to be high. At the same time, there are certain safety risks in on-site tests, such as improper operation may cause equipment damage or personal injury.

[0003] Therefore, when conducting a withstand voltage test on a power cable, there are hidden dangers in the withstand voltage test process due to the limitations of the test operation process and the operating technology level, resulting in the accuracy of the withstand voltage assessment results of the power cable needing to be improved. Summary of the invention

[0004] One or more embodiments of the present specification provide a method, device and medium for evaluating the withstand voltage of a power cable based on virtual simulation, which are used to solve the following technical problems: when performing a withstand voltage test on a power cable, there are hidden dangers in the withstand voltage test process due to the limitations of the test operation process and the operation technology level, resulting in the accuracy of the withstand voltage evaluation results of the power cable needing to be improved.

[0005] One or more embodiments of this specification adopt the following technical solutions:

[0006] One or more embodiments of the present specification provide a method for evaluating power cable withstand voltage based on virtual simulation, the method comprising: obtaining an operation process data set corresponding to an ultra-low frequency AC withstand voltage test through big data technology, and determining an operation process task node sequence corresponding to the ultra-low frequency AC withstand voltage test based on the operation process data set, wherein the operation process task node sequence comprises a plurality of operation process task nodes arranged in sequence; collecting cable structure data of the power cable to be evaluated and test equipment data corresponding to an ultra-low frequency test equipment, and constructing a cable model corresponding to the power cable to be evaluated and a test equipment model corresponding to the ultra-low frequency test equipment based on the cable structure data and the test equipment data, respectively; determining cable environment data of the power cable to be evaluated, and constructing a corresponding withstand voltage test virtual scene based on the cable environment data, and obtaining interactive action information of a test user in the withstand voltage test virtual scene; performing test operation evaluation on the interactive action information based on the operation process task node sequence, and when the test operation evaluation meets the preset requirements, testing the cable model through the test equipment model, and collecting simulation test parameters of the power cable to be evaluated, and determining the withstand voltage evaluation result of the power cable to be evaluated based on the simulation test parameters.

[0007] One or more embodiments of this specification provide a power cable withstand voltage assessment device based on virtual simulation, including:

[0008] at least one processor; and,

[0009] a memory communicatively connected to the at least one processor; wherein,

[0010] The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the above method.

[0011] One or more embodiments of the present specification provide a non-volatile computer storage medium storing computer executable instructions, wherein the computer executable instructions are configured to execute the above method.

[0012] At least one of the above-mentioned technical solutions adopted in the embodiments of this specification can achieve the following beneficial effects: through the above-mentioned technical solutions, through big data technology and a clear sequence of operation process task nodes, the standardization and systematization of the evaluation process are ensured, and the interference of human factors is reduced. The construction of a virtual scene for a withstand voltage test allows the test user to operate in an environment close to the real one, thereby improving the accuracy and reliability of the evaluation results; the simulation test is carried out using a cable model and a test equipment model, thereby avoiding the complexity and potential risks in actual physical testing and significantly improving the test efficiency; through the evaluation of interactive action information in the virtual scene, potential operational problems can be discovered and corrected in advance, thereby reducing the risks in actual testing; the simulation test reduces the dependence on actual power cables and test equipment, reduces material consumption and equipment wear costs, and through big data analysis and model building, test resources can be more reasonably allocated to avoid waste of resources; through the virtual scene for a withstand voltage test, the test user can more intuitively understand the operation process and task nodes, thereby enhancing operability and user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art description. Obviously, the drawings described below are only some embodiments recorded in this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. In the drawings:

[0014] Figure 1 A schematic diagram of a flow chart of a method for evaluating power cable withstand voltage based on virtual simulation provided in an embodiment of this specification;

[0015] Figure 2 A schematic diagram of the structure of a power cable withstand voltage assessment device based on virtual simulation provided in an embodiment of this specification. DETAILED DESCRIPTION

[0016] In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below in conjunction with the drawings in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments of this specification, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this specification.

[0017] The embodiment of this specification provides a method for evaluating the withstand voltage of a power cable based on virtual simulation. It should be noted that the execution subject in the embodiment of this specification can be a server or any device with data processing capabilities. Figure 1 A schematic diagram of a flow chart of a method for evaluating power cable withstand voltage based on virtual simulation provided in an embodiment of this specification, such as Figure 1 As shown, it mainly includes the following steps:

[0018] Step S101, obtaining an operation process data set corresponding to the ultra-low frequency AC withstand voltage test through big data technology, so as to determine an operation process task node sequence corresponding to the ultra-low frequency AC withstand voltage test based on the operation process data set.

[0019] Wherein, the operation process task node sequence includes a plurality of operation process task nodes arranged in sequence;

[0020] In one embodiment of the present specification, big data technology is used to mine an operational process data set corresponding to an ultra-low frequency AC withstand voltage test. For example, big data technology is used to mine relevant standards, literature, research reports, and equipment specifications corresponding to the ultra-low frequency AC withstand voltage test to understand the theoretical basis and operational requirements of the 0.1 Hz AC withstand voltage test, and actual operational experience data is obtained through an expert database of experts in the field. The steps in the existing operational manual can also be analyzed through the operational manual to identify key operations and potential risk points. In addition to the above methods, the operator's behavior and operation sequence can also be determined in the operational process data set by analyzing the operational video.

[0021] Based on the operation process data set, the operation process task node sequence corresponding to the ultra-low frequency AC withstand voltage test is determined, specifically including: analyzing the operation process data set to determine multiple test operation processes corresponding to the ultra-low frequency AC withstand voltage test and the process description information corresponding to each of the test operation processes; through the multiple test operation processes, corresponding independently executable operation process task nodes are determined, and based on the process description information corresponding to each of the test operation processes, the logical order and dependency relationship between each of the operation process task nodes are analyzed; according to the logical order and dependency relationship between each of the operation process task nodes, the multiple operation process task nodes are sorted to determine the operation process task node sequence corresponding to the ultra-low frequency AC withstand voltage test.

[0022] In one embodiment of the present specification, the operation process task node sequence corresponding to the ultra-low frequency AC withstand voltage test is determined according to the operation process data set, firstly all the operation steps and tasks contained in the data set are analyzed, and then these steps and tasks are organized into an orderly sequence according to the logical order and dependency of the test. Through the operation process data set, the operation process data about the ultra-low frequency AC withstand voltage test is determined, including the preparation work before the test, equipment connection, parameter setting, test start, voltage rise control, monitoring during the test, and discharge treatment after the test. These data are sorted to ensure that each operation step has a clear description and corresponding precautions. The operation process data set is analyzed to determine the multiple test operation processes corresponding to the ultra-low frequency AC withstand voltage test and the process description information corresponding to each test operation process, and all the operation task nodes are identified from the sorted data, each node represents a specific operation step or task, and it is ensured that each task node is independent, executable, and has clear goals and results. Based on the process description information corresponding to each test operation process, the logical order and dependency between each task node of the operation process are analyzed, and the logical order and dependency between each task node are analyzed to determine the sequence between them. Identify which task nodes must be completed before other nodes, which task nodes can be executed in parallel, and which task nodes are nodes on the critical path of the test. According to the logical order and dependency between each task node of the operation process, sort the multiple task nodes of the operation process, organize the task nodes into an ordered sequence, ensure that each node is executed after the node it depends on is completed, and determine the operation process task node sequence corresponding to the ultra-low frequency AC withstand voltage test. In addition, ensure that each node in the sequence is necessary, without redundant or missing steps. Verify the constructed task node sequence to ensure that it complies with the actual operation process of the ultra-low frequency AC withstand voltage test. Optimize the sequence according to the verification results, adjust the order between nodes or merge similar nodes to improve the efficiency and accuracy of the test. It should be noted that there are differences in the operation process task node sequence corresponding to the power cable under different parameters. In actual use, the operation process task node sequence can be matched according to the parameters of the power cable.

[0023] Through the above technical solutions, the operation process data set constructed based on big data technology can provide standardized test operation steps to ensure that the test is carried out according to the established and optimized process, thereby reducing the impact of human factors on the test results; big data technology can analyze historical test data and predict the resources required for different test stages (such as equipment, personnel, time, etc.), thereby helping the test team to rationally plan resource allocation and avoid resource waste; by optimizing resource allocation and improving test efficiency, big data technology helps to reduce the overall cost of ultra-low frequency AC withstand voltage testing. In addition, by discovering potential problems in advance and taking measures to solve them, it can also reduce the cost of repeated tests caused by test failures.

[0024] Step S102, collecting cable structure data of the power cable to be evaluated and test equipment data corresponding to the ultra-low frequency test equipment, so as to construct a cable model corresponding to the power cable to be evaluated and a test equipment model corresponding to the ultra-low frequency test equipment based on the cable structure data and the test equipment data respectively.

[0025] Based on the cable structure data and the test equipment data, respectively, a cable model corresponding to the power cable to be evaluated and a test equipment model corresponding to the ultra-low frequency test equipment are constructed, specifically including: constructing a cable distribution parameter model according to the cable structure data, determining the cable environmental parameters corresponding to the power cable to be evaluated based on the application scenario of the power cable to be evaluated, and determining the cable environmental temperature field model and the cable environmental magnetic field distribution model; constructing a cable model corresponding to the power cable to be evaluated through the cable distribution parameter model, the cable environmental temperature field model and the cable environmental magnetic field distribution model. Determine the ultra-low frequency test transformer and filter device in the test equipment data, so as to construct a corresponding electromagnetic coupling model based on the ultra-low frequency test transformer, and construct a filter circuit model based on the filter device; construct the test equipment model corresponding to the ultra-low frequency test equipment through the electromagnetic coupling model and the filter circuit model.

[0026] In one embodiment of the present specification, the cable structure data of the power cable to be evaluated and the test equipment data corresponding to the ultra-low frequency test equipment are collected, and physical modeling is performed on the two types of equipment. High-precision three-dimensional modeling software, such as 3dsMax, Maya, etc., is used to model the 0.1Hz AC withstand voltage test equipment. In the modeling process, factors such as the appearance size, internal structure, and material properties of the equipment are fully considered to ensure the accuracy and authenticity of the model. For the working principle and electrical characteristics of the equipment, a combination of physical modeling and mathematical modeling is used for simulation. For example, for a 0.1Hz ultra-low frequency test transformer, its electromagnetic coupling model is established, and the output voltage, current and other parameters of the transformer are calculated; for a filtering device, its filtering circuit model is established and its filtering effect is analyzed.

[0027] In one embodiment of the present specification, the equipment model includes a cable model and a test equipment model. According to the cable structure data, a cable distribution parameter model is constructed, and based on the application scenario of the power cable to be evaluated, the cable environmental parameters corresponding to the power cable to be evaluated are determined, and the cable environmental temperature field model and the cable environmental magnetic field distribution model are determined; the cable model corresponding to the power cable to be evaluated is constructed through the cable distribution parameter model, the cable environmental temperature field model and the cable environmental magnetic field distribution model. The ultra-low frequency test transformer and the filter device in the test equipment data are determined to construct a corresponding electromagnetic coupling model based on the ultra-low frequency test transformer, and a filter circuit model is constructed according to the filter device; the test equipment model corresponding to the ultra-low frequency test equipment is constructed through the electromagnetic coupling model and the filter circuit model. The mathematical modeling part describes the distribution and change of the electromagnetic field through Maxwell's equations, and describes the temperature distribution of the cable through the heat conduction equation. For shorter cables, a lumped parameter model can be used to simplify the calculation; for longer cables, a distributed parameter model is required to accurately describe the distribution of voltage and current.

[0028] The process of combining physical modeling with mathematical modeling is as follows: convert the parameters of the physical model into coefficients in the mathematical model, such as converting the leakage inductance of the transformer into the inductance parameters in the mathematical model; establish mathematical equations based on physical principles, such as using Maxwell's equations to describe the changes in the electromagnetic field. Set the boundary conditions of the mathematical model according to the boundary conditions of the physical model, such as the terminal conditions of the cable. Before the simulation starts, initialize the mathematical model according to the physical characteristics of the cable and the test equipment, including setting the initial voltage, current and temperature distribution. Use numerical methods (such as finite difference method and finite element method) to perform time step calculations on the mathematical model to simulate the changes of voltage and current over time. In each time step, simulate physical processes such as the propagation of electromagnetic fields, the generation of dielectric losses, the occurrence of partial discharges, etc. The data calculated by the mathematical model are fed back to the physical model to adjust the parameters of the model, such as adjusting the dielectric loss according to temperature changes.

[0029] In one embodiment of the present specification, in order to improve the rendering effect and real-time performance of the model, an optimized model mesh structure and material texture are used, and graphics acceleration technology, such as OpenGL, DirectX, etc., is used to improve the drawing efficiency of the model. By optimizing the model mesh structure and material texture, the amount of calculation required for rendering is reduced, the rendering speed is increased, and graphics acceleration technology, such as OpenGL or DirectX, is used to accelerate the rendering and display of graphics, achieve a faster frame rate, and improve the user experience.

[0030] The actual geometric data and physical property information of the power cable to be evaluated and the ultra-low frequency test equipment are obtained, and the physical property information includes conductivity information, dielectric constant information and thermal conductivity information; according to the actual geometric data of the power cable to be evaluated and the ultra-low frequency test equipment, geometric simplification is performed to remove unnecessary details to reduce the number of meshes. The automatic meshing tool is used to determine the mesh structure according to the actual geometric data and the preset simulation accuracy. This can be done in the following ways: use finer meshes in key areas of the model (such as cable insulation layers and local discharge points) to capture subtle physical phenomena; use transition meshes between different areas of the model to ensure the continuity and quality of the mesh; use coarser meshes in unimportant areas of the model to reduce the amount of calculation; use tetrahedral meshes for complex geometric shapes; and use hexahedral meshes for regular geometric shapes to improve calculation efficiency.

[0031] The material properties are determined by the physical property information of the power cable to be evaluated and the ultra-low frequency test equipment, wherein the physical property information includes conductivity information, dielectric constant information and thermal conductivity information; the material properties are mapped using texture mapping technology to apply the material properties to the corresponding model surface and determine the material texture parameters. First, create a texture that reflects the surface characteristics of the material, such as color, gloss, roughness, etc. Determine the texture coordinates and correctly map the texture to the surface of the model. Specific material textures include color textures that reflect the appearance color of the model, concave-convex textures that simulate tiny concave and convex surfaces to enhance visual effects, and normal textures that simulate more complex geometric details by changing the normal direction of the surface.

[0032] Analyze the geometric models of the cable and test equipment to determine the areas that need to be rendered and the parts that can be simplified. Use mesh optimization tools such as mesh smoothing and mesh refinement to improve mesh quality. In the material editor of the simulation software, adjust material properties and create and edit textures. Perform rendering tests in the software to check the application effects of the mesh and material and make necessary adjustments. Render the cable model and the test equipment model corresponding to the ultra-low frequency test equipment through the mesh structure and the material texture parameters.

[0033] Through the above technical solution, by collecting detailed cable structure data, an accurate cable model can be constructed, which can accurately reflect the physical characteristics and electrical performance of the cable. Similarly, the test equipment model constructed based on the test equipment data of the ultra-low frequency test equipment can simulate the equipment status and operating environment during the actual test process; the cable model can be used to analyze the performance of the cable under different working conditions, such as insulation strength, current carrying capacity, temperature distribution, etc., which helps to discover potential defects and problems of the cable and provide a basis for subsequent maintenance and modification; the test equipment model can help engineers understand the operating principle and performance characteristics of the equipment, and then optimize the design or improvement of the equipment. For example, by simulating the test process under different parameters, the best equipment configuration and operating parameters can be found.

[0034] Step S103, determining the cable environment data of the power cable to be evaluated, and building a corresponding voltage withstand test virtual scene based on the cable environment data to obtain the interactive action information of the test user in the voltage withstand test virtual scene.

[0035] In one embodiment of the present specification, a virtual reality engine, such as Unity, Unreal Engine, etc., is used to create a test scene. In the process of scene construction, the actual test site and cable laying environment are referred to to construct elements such as terrain, buildings, roads, etc., and reasonable lighting, shadows and material effects are set to create a realistic visual environment. In order to enhance the realism and immersion of the scene, environmental sound effects and physical simulation technology are used. For example, environmental sound effects such as wind, rain, and equipment operation sounds are added to simulate the physical effects of objects such as gravity, collision, and friction, so that users can feel the real environment atmosphere in the virtual scene.

[0036] Obtaining the interactive action information of the test user in the virtual scene of the voltage test, specifically includes: under the specified trigger of the test user, collecting the real-time trigger data of the test user in the virtual scene of the voltage test, wherein the real-time trigger data includes model setting parameters and / or model connection parameters; obtaining the interactive action information of the test user in the virtual scene of the voltage test through the real-time trigger data.

[0037] In one embodiment of the present specification, the test site and environment of the power cable to be evaluated are simulated through a virtual scene of a withstand voltage test. The test user uses a test equipment model to conduct a virtual test on the cable model in the virtual scene of the withstand voltage test. During the test, the test user triggers actions in the virtual scene according to the test process, such as setting parameters of the withstand voltage test model and / or connecting the withstand voltage test model and the cable model. Through the user triggering the action, it is determined to obtain the interactive action information of the test user in the virtual scene of the withstand voltage test. Performing simulation tests by means of virtual scenes and virtual equipment models avoids the potential risks of equipment damage and test personnel injury in the actual test process, and has a strong possibility of trial and error.

[0038] Step S104, based on the operation process task node sequence, perform test operation evaluation on the interactive action information. When the test operation evaluation meets the preset requirements, test the cable model through the test equipment model, collect the simulation test parameters of the power cable to be evaluated, and determine the withstand voltage evaluation result of the power cable to be evaluated based on the simulation test parameters.

[0039] In one embodiment of the present specification, through the operation process task node sequence, a plurality of operation process task nodes arranged in sequence are obtained, and standard interaction information is set for each operation process task node in advance, where the standard interaction information refers to information used to represent the user trigger specification, and the standard interaction information corresponding to each operation process task node is determined. The interactive action information is matched with the standard interaction information to determine the actual trigger task information corresponding to the test user, and the actual trigger task information includes the current task node and the trigger specification indicator corresponding to the interactive action information. It should be noted that the current task node corresponding to the interactive action information can be determined by the open state of each task node. According to the operation sequence of the task node, the development of each task node needs to rely on the task completion of the previous task node. That is, only after the previous task node is completed, the operation area corresponding to the next task node is converted from the closed state to the open state. The open state refers to the state in which the user is allowed to set the corresponding parameters or the corresponding line connection, and the closed state refers to the state in which the user is not allowed to set the parameters or the line connection. The trigger specification index refers to the degree of regulation of the actual trigger value of the test user, such as whether the voltage value, connection relationship, etc. meet the standard value in the standard interaction information. The setting of the specific parameter value can be determined by the deviation degree. When the deviation degree is not greater than the preset error threshold, the trigger specification index is set to 1, otherwise it is set to 0; for the trigger specification index corresponding to the wiring connection relationship, the actual connection relationship of the test user is compared with the standard connection relationship corresponding to this task node, and it is set to 1 if it meets the standard connection relationship, otherwise it is set to 0. When the trigger specification index meets the preset requirements, the trigger environment corresponding to the next operation process task node of the current task node is set to an open state to collect the specified interactive action information of the test user at the next operation process task node. Determine the specified trigger task information corresponding to the specified interactive action information. When the specified trigger task information is the task node at the end of the operation process task node sequence, the test user is evaluated for the test operation through the trigger specification index corresponding to each operation process task node to determine the test user's test environment construction score.

[0040] Through the trigger specification indicators corresponding to each operation process task node, the test user's test operation is evaluated to determine the test user's test environment setup score, specifically including: obtaining the pre-set node reference weight of each operation process task node and the node operation completion degree of the test user at each operation process task node; determining the corresponding node evaluation indicator through the node operation completion degree of each operation process task node and the trigger specification indicators corresponding to each operation process task node; determining the test user's test environment setup score based on the node reference weight of each operation process task node, the node evaluation indicator and the number of operation process task nodes corresponding to the operation process task node sequence.

[0041] In one embodiment of the present specification, the node reference weight of each operation process task node and the node operation completion degree of the test user at each operation process task node are pre-set, and each task node corresponds to at least one node operation. When the node operation is completed, the corresponding node operation completion degree is 1. The product of the node operation completion degree corresponding to each node operation in each operation process task node and the trigger specification index corresponding to the node operation is calculated, and multiple node operations are added to determine the node evaluation index corresponding to each operation process task node. It should be noted that the trigger specification index corresponding to each operation process task node includes trigger specification indicators corresponding to multiple node operations. The node reference weight of each operation process task node is multiplied by the node evaluation index, and the sum of the products is taken to obtain a summary evaluation index, and the test environment construction score of the test user is determined by the ratio of the summary evaluation index and the number of operation process task nodes corresponding to the operation process task node sequence.

[0042] In one embodiment of the present specification, when the test operation evaluation meets the preset requirements, the cable model is tested through the test equipment model, and the simulation test parameters corresponding to the power cable to be evaluated are collected. It should be noted that the preset requirements here can be calculated according to the standard operation process according to the above process to obtain a reference score value, and the test environment is built to score and reference score value to determine whether the user operation during the test is standardized. When the requirements are met, the cable model is tested through the test equipment model, and the simulation test parameters corresponding to the power cable to be evaluated are collected. It should be noted that the simulation test parameters here refer to the simulation test output parameters used to evaluate the withstand voltage performance of the power cable.

[0043] Based on the simulation test parameters, the withstand voltage evaluation result of the power cable to be evaluated is determined, specifically including: using data mining to obtain multiple test data, modeling the multiple test data through machine learning technology, and determining a cable withstand voltage evaluation model; the simulation test parameters are input into the cable withstand voltage evaluation model to determine the withstand voltage evaluation result of the power cable to be evaluated.

[0044] Based on the equivalent circuit model of power cable and the principle of 0.1Hz AC withstand voltage test, a mathematical model for test result analysis is established. Numerical calculation methods, such as finite element method and finite difference method, are used to calculate and analyze parameters such as voltage, current, capacitance, and dielectric loss during the test. Data mining and machine learning techniques are used to analyze and process a large amount of test data, extract the characteristic parameters and evaluation indicators of cable insulation performance, and establish a cable withstand voltage evaluation model. The simulation test parameters are input into the cable withstand voltage evaluation model to determine the withstand voltage evaluation results of the power cable to be evaluated. By defining a clear sequence of task nodes in the operation process, the consistency of each evaluation is ensured and human operation errors are reduced; before the formal test, the interactive action information is evaluated for test operation to ensure that all steps meet the preset requirements, which improves the reliability of the test process and the accuracy of the results; the task node sequence design of the operation process helps to quickly locate and execute key test steps, reduce unnecessary operations, and improve test efficiency; after meeting the preset requirements, the test is automatically performed through the test equipment model, which reduces human intervention and further speeds up the test process; using simulation tests instead of actual physical tests can significantly reduce material consumption and equipment wear during the test process, thereby reducing test costs; through preliminary test operation evaluation and simulation tests, potential problems can be discovered and corrected in a timely manner, failures in actual applications can be avoided, and additional costs caused by failures can be reduced; the collected simulation test parameters provide objective and quantitative data support for the withstand voltage performance of the power cable to be evaluated. The withstand voltage evaluation results determined based on the simulation test parameters can predict and assess the performance of the power cable under different working conditions, providing a guarantee for the stable operation of the power system.

[0045] Through the above technical scheme, through big data technology and a clear sequence of operation process task nodes, the standardization and systematization of the evaluation process are ensured, and the interference of human factors is reduced. The construction of a virtual scene for the withstand voltage test allows test users to operate in an environment close to the real environment, which improves the accuracy and reliability of the evaluation results; the use of cable models and test equipment models for simulation testing avoids the complexity and potential risks in actual physical testing and significantly improves the test efficiency. Through the evaluation of interactive action information in the virtual scene, potential operational problems can be discovered and corrected in advance, reducing the risks in actual testing; simulation testing reduces dependence on actual power cables and test equipment, reduces material consumption and equipment wear costs, and through big data analysis and model building, test resources can be more reasonably allocated to avoid waste of resources. Through the virtual scene of the withstand voltage test, test users can more intuitively understand the operation process and task nodes, enhancing operability and user experience.

[0046] The embodiment of this specification also provides a power cable withstand voltage assessment device based on virtual simulation, such as Figure 2As shown, the device includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the above method.

[0047] The embodiments of the present specification also provide a non-volatile computer storage medium storing computer executable instructions, wherein the computer executable instructions are configured to execute the above method.

[0048] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device, equipment, and non-volatile computer storage medium embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0049] The above is a description of a specific embodiment of the specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0050] The devices and media provided in the embodiments of this specification correspond one-to-one to the methods. Therefore, the devices and media also have similar beneficial technical effects as the corresponding methods. Since the beneficial technical effects of the methods have been described in detail above, the beneficial technical effects of the devices and media will not be repeated here.

[0051] Those skilled in the art will appreciate that the embodiments of this specification may be provided as methods, systems, or computer program products. Therefore, this specification may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, this specification may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0052] This specification is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of this specification. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes 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.

[0053] These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0054] 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.

[0055] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0056] The memory may include non-permanent storage in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0057] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0058] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0059] The above description is only one or more embodiments of this specification and is not intended to limit this specification. For those skilled in the art, one or more embodiments of this specification may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of one or more embodiments of this specification shall be included in the scope of the claims of this specification.

Claims

1. A method for evaluating power cable withstand voltage based on virtual simulation, characterized in that: The method comprises: By using big data technology, an operation process data set corresponding to the ultra-low frequency AC withstand voltage test is obtained, so as to determine an operation process task node sequence corresponding to the ultra-low frequency AC withstand voltage test based on the operation process data set, wherein the operation process task node sequence includes a plurality of operation process task nodes arranged in sequence; Collecting cable structure data of the power cable to be evaluated and test equipment data corresponding to the ultra-low frequency test equipment, so as to construct a cable model corresponding to the power cable to be evaluated and a test equipment model corresponding to the ultra-low frequency test equipment based on the cable structure data and the test equipment data respectively; Determine the cable environment data of the power cable to be evaluated, and build a corresponding voltage withstand test virtual scene based on the cable environment data to obtain the interactive action information of the test user in the voltage withstand test virtual scene; Based on the operation process task node sequence, a test operation evaluation is performed on the interactive action information. When the test operation evaluation meets the preset requirements, the cable model is tested by the test equipment model, and the simulation test parameters of the power cable to be evaluated are collected to determine the withstand voltage evaluation result of the power cable to be evaluated based on the simulation test parameters.

2. A method for evaluating power cable withstand voltage based on virtual simulation according to claim 1, characterized in that: Based on the operation process data set, determining the operation process task node sequence corresponding to the ultra-low frequency AC withstand voltage test specifically includes: Analyze the operation process data set to determine multiple test operation processes corresponding to the ultra-low frequency AC withstand voltage test and process description information corresponding to each of the test operation processes; Determine the corresponding independently executable operation process task nodes through the multiple test operation processes, and analyze the logical sequence and dependency relationship between each of the operation process task nodes based on the process description information corresponding to each of the test operation processes; According to the logical order and dependency relationship between each of the operation process task nodes, the plurality of operation process task nodes are sorted to determine the operation process task node sequence corresponding to the ultra-low frequency AC withstand voltage test.

3. A method for evaluating power cable withstand voltage based on virtual simulation according to claim 1, characterized in that: Based on the cable structure data and the test equipment data, respectively, a cable model corresponding to the power cable to be evaluated and a test equipment model corresponding to the ultra-low frequency test equipment are constructed, specifically including: Constructing a cable distribution parameter model according to the cable structure data, determining the cable environmental parameters corresponding to the power cable to be evaluated based on the application scenario of the power cable to be evaluated, and determining a cable environmental temperature field model and a cable environmental magnetic field distribution model; Constructing a cable model corresponding to the power cable to be evaluated by using the cable distribution parameter model, the cable environment temperature field model and the cable environment magnetic field distribution model; Determine the ultra-low frequency test transformer and the filter device in the test equipment data, construct a corresponding electromagnetic coupling model based on the ultra-low frequency test transformer, and construct a filter circuit model based on the filter device; A test equipment model corresponding to the ultra-low frequency test equipment is constructed by using the electromagnetic coupling model and the filter circuit model.

4. The method for evaluating power cable withstand voltage based on virtual simulation according to claim 1, characterized in that: The method further comprises: Acquiring actual geometric data and physical property information of the power cable to be evaluated and the ultra-low frequency test equipment, wherein the physical property information includes conductivity information, dielectric constant information and thermal conductivity information; According to the actual geometric data of the power cable to be evaluated and the ultra-low frequency test equipment, geometric simplification is performed to determine the mesh structure according to the actual geometric data and the preset simulation accuracy using an automatic meshing tool; Determine material properties through physical property information of the power cable to be evaluated and the ultra-low frequency test equipment, wherein the physical property information includes electrical conductivity information, dielectric constant information and thermal conductivity information; Using texture mapping technology, mapping the material attributes to apply the material attributes to the corresponding model surface and determine material texture parameters; The cable model and the test equipment model corresponding to the ultra-low frequency test equipment are rendered using the grid structure and the material texture parameters.

5. The method for evaluating power cable withstand voltage based on virtual simulation according to claim 1, characterized in that: Obtaining the interactive action information of the test user in the pressure test virtual scene, specifically including: Under the designated trigger of the test user, collecting the real-time trigger data of the test user in the withstand voltage test virtual scene, wherein the real-time trigger data includes model setting parameters and / or model connection parameters; The interactive action information of the test user in the pressure test virtual scene is obtained through the real-time trigger data.

6. A method for evaluating power cable withstand voltage based on virtual simulation according to claim 1, characterized in that: Based on the operation process task node sequence, a test operation evaluation is performed on the interactive action information, specifically including: Acquire a plurality of sequentially arranged operation process task nodes through the operation process task node sequence to determine standard interaction information corresponding to each of the operation process task nodes; Matching the interactive action information with the standard interactive information to determine the actual triggered task information corresponding to the test user, wherein the actual triggered task information includes the current task node and trigger specification indicators corresponding to the interactive action information; When the trigger specification indicator meets the preset requirements, the trigger environment corresponding to the next operation process task node of the current task node is set to an open state to collect the specified interaction action information of the test user at the next operation process task node; Determine the designated trigger task information corresponding to the designated interactive action information. When the designated trigger task information is a task node located at the end of the operation process task node sequence, perform a test operation evaluation on the test user through the trigger specification indicators corresponding to each of the operation process task nodes to determine the test environment setup score of the test user.

7. A method for evaluating power cable withstand voltage based on virtual simulation according to claim 6, characterized in that: The test user is evaluated for the test operation by using the trigger specification indicators corresponding to each of the operation process task nodes to determine the test environment building score of the test user, specifically including: Acquire a node reference weight preset for each of the operation process task nodes and a node operation completion degree of the test user at each of the operation process task nodes; Determine the corresponding node evaluation index through the node operation completion degree of each of the operation process task nodes and the trigger specification index corresponding to each of the operation process task nodes; The test environment building score of the test user is determined based on the node reference weight of each of the operation process task nodes, the node evaluation index and the number of operation process task nodes corresponding to the operation process task node sequence.

8. The method for evaluating power cable withstand voltage based on virtual simulation according to claim 1, characterized in that: Determining a withstand voltage evaluation result of the power cable to be evaluated based on the simulation test parameters specifically includes: Using data mining technology to obtain multiple test data, using machine learning technology to model the multiple test data, and determining a cable withstand voltage assessment model; The simulation test parameters are input into the cable withstand voltage evaluation model to determine the withstand voltage evaluation result of the power cable to be evaluated.

9. A power cable withstand voltage assessment device based on virtual simulation, characterized in that: The device comprises: at least one processor; and, a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can perform the method according to any one of claims 1 to 8.

10. A non-volatile computer storage medium storing computer executable instructions, characterized in that: The computer executable instructions are configured to execute the method according to any one of claims 1 to 8.

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