Fatigue damage assessment method for fine simulation of extra-high voltage hard jumper

Abstract

The application provides a fatigue damage evaluation method for fine simulation of extra-high voltage hard jumper, and belongs to the technical field of safety evaluation of power facilities, and comprises the following steps: collecting geometric structure parameters and material attribute parameters of an extra-high voltage hard jumper and structure parameters of a matched clamp; establishing a three-dimensional geometric model of a jumper body segment containing the extra-high voltage hard jumper and a corresponding matched clamp according to the collected geometric structure parameters, material attribute parameters and structure parameters; importing the three-dimensional geometric model into finite element analysis software, defining material parameters, cross-section parameters, connection relationships, boundary conditions and load conditions, and generating a finite element analysis model; performing finite element solving on the finite element model according to different analysis conditions, obtaining stress distribution, strain state and deformation state under corresponding conditions, and completing fatigue life evaluation of a target region of the extra-high voltage hard jumper and calculating total damage of the target region according to the stress distribution, strain state and deformation state under the analysis conditions and in combination with a fatigue design method.

Description

Technical Field

[0001] This invention belongs to the field of power facility safety assessment technology, specifically relating to a fatigue damage assessment method based on refined simulation of ultra-high voltage hard jumpers. Background Technology

[0002] In transmission lines, jumpers are mainly used to connect conductors or related fittings on both sides of tension towers. Their spatial shape, installation location, and stress state have a significant impact on the safe operation of the line. Existing jumper designs are usually based on engineering experience, two-dimensional drawings, or simplified calculations, which can meet general design requirements. However, under conditions such as complex tower types, tight passages, strong winds, or icing, the spatial location of the jumper, the electrical clearance to the tower and fittings, and the structural stress and deformation may be difficult to accurately assess.

[0003] Meanwhile, traditional modeling methods do not adequately consider details such as the jumper body, hardware connections, and suspension point constraints. Summary of the Invention

[0004] In view of this, the present invention addresses the shortcomings of the prior art by providing a fatigue damage assessment method for refined simulation of ultra-high voltage hard jumpers. To solve the above-mentioned technical problems, the technical solution adopted by the present invention includes: collecting the geometric structural parameters and material property parameters of ultra-high voltage hard jumpers, as well as the structural parameters of the corresponding matching clamps of ultra-high voltage hard jumpers. Based on the collected geometric parameters, material properties, and structural parameters, a three-dimensional geometric model is established, including the jumper body segments of the UHV hard jumper and the corresponding matching clamps. The three-dimensional geometric model is then imported into finite element analysis software, and the material parameters, cross-sectional parameters, connection relationships, boundary conditions, and load conditions of the three-dimensional geometric model in the finite element analysis software are defined to generate a calculable finite element analysis model. According to different analysis conditions, the finite element model is solved by finite element method to obtain the stress distribution and strain state distribution under the corresponding analysis conditions. Based on the stress distribution of the finite element model under different analysis conditions, the target area in the jumper body segment of the UHV hard jumper in the finite element model is determined. The total damage of the target region is evaluated based on the stress distribution and strain state distribution of the target region under different analysis conditions in the finite element model.

[0005] Furthermore, the geometric parameters include jumper-related parameters and stranded wire-related parameters. The parameters related to patch cords include the length of the patch cord body segments, the connection dimensions of the matching clamps, and the parameters of the stranded wire layer structure. The parameters related to the stranded wires include the number of individual strands, the diameter of a single wire, and the twist angle of each layer of the stranded wire. The material property parameters include Young's modulus, Poisson's ratio, and yield stress of each layer of strands.

[0006] Furthermore, the three-dimensional geometric model of the jumper body segment is a refined model at the strand level, which is constructed layer by layer and strand by strand based on the single wire diameter and twist angle of each layer of strands. The length of the jumper body segment is 300mm to 600mm, and the matching clamp includes a drain plate and a pressure head; the three-dimensional geometric model shows the assembly relationship between the matching clamp and the jumper body segment.

[0007] Furthermore, the connection relationship includes at least the contact relationship between the strands in the three-dimensional geometric model and the crimping constraint relationship between the internal pressure head of the matching wire clamp and the jumper body; The boundary conditions include applying a fixed constraint to one end of the jumper body segment and applying a force load or displacement load reflecting the overall force of the jumper system to the other end.

[0008] Furthermore, the analysis conditions include jumper self-weight condition, wind load condition, and icing load condition. The analysis conditions also include combination conditions formed by combining at least two of the jumper self-weight condition, wind load condition, and icing load condition.

[0009] Furthermore, based on the stress distribution and strain state distribution of the target region under different analysis conditions in the finite element model, the total damage of the target region is evaluated, including: Based on the stress distribution of the target region in the finite element model under different analysis conditions, the actual number of cycles of the target region at different stress levels is determined by combining the fatigue design method; based on the strain state distribution of the target region in the finite element model under different analysis conditions, the theoretical fatigue life cycle number of the target region at different stress levels is determined by combining the fatigue design method. The total damage to the target area is calculated based on the actual number of cycles at different stress levels and the theoretical fatigue life cycle number at different stress levels.

[0010] Furthermore, the total damage to the target area is calculated using the Miner linear cumulative damage criterion, and the mathematical expression for the total damage is:

[0011] In the formula, D represents the total damage; For the target area at stress level The actual number of cycles under the influence; For the target area at stress level The theoretical fatigue life cycle count; The stress level is indicated by the D value; fatigue failure is determined when the D value reaches or exceeds 1.

[0012] Furthermore, the theoretical fatigue life cycle count Based on the Manson-Coffin formula and the SN curve of the material, the expression of the Manson-Coffin formula is as follows:

[0013] In the formula, To extract the total strain amplitude of the target region from the strain state distribution at the corresponding level under the corresponding analysis conditions; This is the fatigue strength coefficient; Young's modulus; This represents the theoretical fatigue life cycle count. The fatigue strength index; It is the fatigue ductility coefficient; It is the fatigue ductility index.

[0014] Furthermore, based on the stress distribution of the finite element model under different analysis conditions, the target region in the jumper body segment of the UHV hard jumper in the finite element model is determined, including: based on the stress distribution of the finite element model under different analysis conditions, the stress concentration region of the UHV hard jumper in the finite element model is taken as the target region of the jumper body segment.

[0015] Furthermore, it also includes performing finite element analysis on the finite element model according to different analysis conditions to obtain the deformation state distribution of the finite element model under different analysis conditions; and adjusting the jumper length, hanging point position or hardware configuration of the UHV hard jumper line based on the stress distribution, strain distribution and deformation state distribution of the finite element model under different analysis conditions, combined with the total damage of the target area.

[0016] A fatigue damage assessment device for refined simulation of ultra-high voltage hard jumpers, characterized in that it includes: a parameter acquisition module, used to acquire the geometric structural parameters and material property parameters of the ultra-high voltage hard jumper, as well as the structural parameters of the corresponding matching clamps of the ultra-high voltage hard jumper; The model building module is used to build a three-dimensional geometric model containing the jumper body segments and corresponding matching clamps of the UHV hard jumper wire based on the collected geometric structure parameters, material property parameters and structural parameters. The three-dimensional geometric model is then imported into the finite element analysis software, and the material parameters, section parameters, connection relationships, boundary conditions and load conditions of the three-dimensional geometric model in the finite element analysis software are defined to generate a calculable finite element analysis model. The solution and acquisition module is used to perform finite element solution on the finite element model according to different analysis conditions, obtain the stress distribution and strain state distribution under the corresponding analysis conditions, and determine the target area in the jumper body segment of the UHV hard jumper in the finite element model according to the stress distribution of the finite element model under different analysis conditions. The total damage of the target region is evaluated based on the stress distribution and strain state distribution of the target region under different analysis conditions in the finite element model.

[0017] A computer device, characterized in that it comprises: one or more processors; The processor is used to store one or more programs; When the one or more programs are executed by the one or more processors, the low-voltage DC short-circuit fault clearing method based on power line carrier communication as described above is implemented.

[0018] A computer-readable storage medium, characterized in that it stores a computer program thereon, which, when executed, implements the low-voltage DC short-circuit fault clearing method based on power line carrier communication as described in any one of the above.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention constructs a refined three-dimensional model at the strand level to restore the real structure and assembly relationship of UHV hard jumpers and their matching clamps, replacing the traditional simplified modeling method. This can more accurately reflect the stress and deformation characteristics of jumpers under complex working conditions, reduce the deviation between simulation analysis results and actual operating conditions, and provide a more reliable data foundation for subsequent evaluation.

[0020] 2. This invention combines various typical working conditions and combined working conditions to carry out finite element analysis, and uses the Miner linear cumulative damage criterion and Manson-Coffin formula to evaluate low-cycle fatigue life. It can quantitatively obtain the fatigue damage of target areas such as the outlet of the matching clamp as stress concentration areas, making up for the shortcomings of traditional design methods in accurately assessing the long-term operating risk of jumpers in complex environments, and improving the comprehensiveness and engineering reference value of the evaluation results.

[0021] 3. This invention can adjust the jumper length, hanging point position and hardware configuration in reverse according to stress distribution, strain state, deformation state and fatigue life assessment results. Through multiple iterations of simulation to optimize the layout scheme, it helps to reduce on-site testing and rework costs, improve the adaptability of jumper design and the safety of line operation, and at the same time provide a reusable model basis for the digital design and full life cycle management of UHV projects. Attached Figure Description

[0022] The present invention will now be described in further detail with reference to the accompanying drawings.

[0023] Figure 1 This is a schematic diagram of the helical stranded wire in this invention; wherein Figure 1 (a) is a diagram of the overall structure of the spiral stranded wire; Figure 1 (b) is a tiled diagram of the i-th layer of single-strand wire; Figure 2 This is a schematic diagram showing the position of the segment model in the jumper system in this invention; Figure 3 This is a schematic diagram of the geometric model of the jumper segment in this invention; wherein Figure 3 (a) is the overall model of the jumper segment. Figure 3 (b) is a schematic diagram of the drainage plate and pressure head; Figure 4 This is a schematic diagram of the finite element model generated after the geometric model of the jumper segment in this invention is imported into the finite element software and adjusted; wherein... Figure 4 (a) is a schematic diagram of the mesh generation for the finite element model. Figure 4 (b) is a schematic diagram of the connection relationships in the finite element model. Figure 4 (c) is a schematic diagram of the loads and boundary conditions of the finite element model; Figure 5 This is the SN curve of the material when the Miner criterion is used in this invention; Figure 6 This is a schematic diagram of the process in this invention. Detailed Implementation

[0024] To better understand the present invention, the content of the invention is further clearly illustrated below with reference to embodiments and accompanying drawings. However, the scope of protection of the present invention is not limited to the embodiments described below. Numerous specific details are set forth in the following description to provide a more thorough understanding of the invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details.

[0025] Simplified models are often used in finite element analysis, leading to discrepancies between the analysis results and the actual installation conditions. Therefore, this invention proposes a fatigue damage assessment method based on refined simulation of UHV hard jumpers to improve the accuracy and verifiability of jumper design analysis.

[0026] Example 1: See Figure 1-6 This embodiment presents a fatigue damage assessment method for refined simulation of ultra-high voltage hard jumpers, which includes five core steps: parameter acquisition, three-dimensional geometric modeling, finite element model creation, finite element solution, and low-cycle fatigue life assessment. The specific implementation steps are as follows: Step S1: Collect all design parameters of the UHV rigid jumper body and its matching clamps to provide data support for subsequent modeling and analysis. In this embodiment, the jumper body uses JL / G1A-900 / 40 steel-cored aluminum stranded wire, and the collected parameters are divided into three categories: The geometric parameters of the jumper body include jumper-related parameters and stranded wire-related parameters: Jumper-related parameters include: jumper body segment length, stranded wire layer structure parameters; dimensions of the matching clamp connection part; Stranded wire-related parameters include: for the stranded wire layer structure, the number of single strands, single wire diameter, and twist angle of each layer of the stranded wire; Material property parameters: including Young's modulus, Poisson's ratio, yield stress, and density of each layer of strands; Matching wire clamp structural parameters include: the size of the drain plate, the size of the pressure head, the connection hole position of the matching wire clamp, and the crimping depth.

[0027] The spiral stranded shape of steel-cored aluminum stranded wire is as follows: Figure 1 As shown, the segment selection position is as follows: Figure 2 As shown, its layered structure parameters are shown in the table below:

[0028] Step S2: Establish a 3D geometric model and generate a finite element analysis model. Technicians use 3D modeling software (such as SolidWorks or CATIA) to construct a stranded wire model with a realistic spiral shape layer by layer and strand by strand, based on the collected diameter and twist angle of each strand. This is done instead of simplifying it to a cylinder, thus forming a refined strand-level model. Subsequently, the constructed jumper body segment is assembled with the matching clamp model, which includes a drain plate and pressure head, establishing the physical assembly relationship between the two. The target geometric model is as follows: Figure 3 (a) Overall model and Figure 3 (b) Drain plate and pressure head shown.

[0029] Step S3: After completing the geometric modeling, import the 3D model into finite element analysis software (such as ANSYS or Abaqus). Define material and section parameters in the software, and set connection relationships: including the contact relationships between strands, between strands and matching clamps, and the crimping constraint relationships between the internal pressure head of the matching clamp and the jumper body. The crimping constraint relationships are as follows: Figure 4 (b) A schematic diagram of the connection relationship in the finite element model is shown. In terms of boundary condition settings, a fixed constraint is applied to one end of the segment model, while a force load or displacement load reflecting the overall stress on the jumper system is applied to the other end to simulate the actual suspension state, such as... Figure 4 (c) A schematic diagram of the loads and boundary conditions of the finite element model is shown. Finally, the load conditions are defined and the mesh is generated as follows: Figure 4(a) A schematic diagram of the mesh generation of the finite element model is shown, generating a computable finite element analysis model.

[0030] Based on the actual operating environment of UHV lines, multiple analysis conditions were set. These include: jumper self-weight condition, wind load condition, icing load condition, and combinations of the above conditions (such as self-weight + wind load, self-weight + icing load, etc.). For each condition, the stress distribution cloud map, strain data, and deformation state of the jumper structure under the corresponding load were calculated.

[0031] In areas with abrupt changes in geometry, such as the outlet of the matching clamp, stress concentration occurs. These stress concentration areas are used as target areas to accurately extract the stress-strain state of the target areas, providing a basis for subsequent fatigue assessment.

[0032] Step S4: Solve the finite element model using finite element methods to obtain the stress distribution, strain state, and deformation state under the corresponding analysis conditions. Based on the stress distribution and strain state under the analysis conditions, and combined with fatigue design methods, complete the fatigue life assessment of the target area of ​​the UHV hard jumper and calculate the total damage of the target area, including: Low-cycle fatigue life assessment is performed based on fatigue design methods according to the finite element analysis results of the model; this embodiment uses the Miner linear cumulative damage criterion for calculation. First, the number of fatigue life cycles N under different stress levels is determined according to the Manson-Coffin formula and the SN curve of the material. i After obtaining Ni, calculate the total damage based on the actual number of cycles ni under each working condition:

[0033] In the formula, D represents the total damage; For the target area at stress level The actual number of cycles under the influence; For the target area at stress level The theoretical fatigue life cycle number is determined by the material's SN curve. The stress level is indicated by the D value; fatigue failure is determined when the D value reaches or exceeds 1. The entire evaluation process mainly targets stress concentration areas such as the outlet of the matching clamp, as these areas are critical to determining the lifespan of the jumper.

[0034] The theoretical fatigue life cycle number N under different stress levels is determined based on the Manson-Coffin formula and the SN curve of the material. i The SN curve is formed by Figure 5 As shown, the lifetime estimation method uses the Manson-Coffin formula, expressed as:

[0035] In the formula, To extract the total strain amplitude of the target region from the strain state distribution at the corresponding level under the corresponding analysis conditions; This is the fatigue strength coefficient; Young's modulus; The fatigue life is the number of cycles. The fatigue strength index; It is the fatigue ductility coefficient; It is the fatigue ductility index.

[0036] This method also includes a design optimization phase. Based on the stress distribution, strain state, and deformation state results obtained from finite element analysis, as well as the low-cycle fatigue life assessment conclusions, technicians can adjust the jumper design parameters in reverse. For example, if the assessment finds that the stress or strain exceeds the standard or the life is insufficient, the jumper length can be appropriately adjusted, the position of the tower attachment point can be changed, or different types of hardware configurations can be replaced. Through multiple iterative simulations, the optimal jumper layout scheme can be finally obtained to ensure the safe and stable operation of the line. For each working condition, the stress distribution cloud map, strain data and deformation state of the jumper structure under the corresponding load are calculated; wherein, the deformation state is represented by the spatial displacement of each node of the jumper body segment, and the electrical clearance distance between the jumper and the tower components can be verified by the displacement under wind deflection or icing conditions.

[0037] Technical effects of this embodiment: 1. Improve modeling and analysis accuracy: Segmented 3D geometry and matching wire clamps are used for detailed modeling, which truly reflects the geometry and connection details of jumpers, making the finite element analysis results closer to the actual installation conditions and reducing calculation and on-site deviations.

[0038] 2. Covers multiple working conditions and supports fatigue life assessment: It can analyze stress distribution, strain state and deformation state of conditions such as self-weight, wind load, icing and other conditions and their combinations, and assess low-cycle fatigue life based on fatigue design methods, making engineering assessment more comprehensive and reliable.

[0039] 3. Support design optimization and reduce engineering risks: Adjust jumper length, hanging points and hardware configuration through finite element results to optimize layout, reduce on-site adjustments and rework, and improve structural safety.

[0040] 4. Facilitates digital integration and verifiability: The 3D model and limited metadata can be exchanged between design software for visual review and file management, facilitating design review, collaborative work, and the retention of engineering data.

[0041] Example 2: A fatigue damage assessment device for refined simulation of UHV hard jumpers, based on the fatigue damage assessment method for refined simulation of UHV hard jumpers as described in Example 1, characterized in that it includes: The parameter acquisition module is used to acquire the geometric structure parameters and material property parameters of the UHV hard jumper, as well as the structural parameters of the corresponding matching clamps of the UHV hard jumper. The model building module is used to build a three-dimensional geometric model containing the jumper body segments and corresponding matching clamps of the UHV hard jumper wire based on the collected geometric structure parameters, material property parameters and structural parameters. The three-dimensional geometric model is then imported into the finite element analysis software, and the material parameters, section parameters, connection relationships, boundary conditions and load conditions of the three-dimensional geometric model in the finite element analysis software are defined to generate a calculable finite element analysis model. The solution and acquisition module is used to perform finite element solution on the finite element model according to different analysis conditions, obtain the stress distribution, strain state and deformation state under the corresponding analysis conditions, and complete the fatigue life assessment of the target area of ​​the UHV hard jumper and calculate the total damage of the target area based on the stress and strain under the analysis conditions and in combination with the fatigue design method.

[0042] Example 3: A computer device, characterized in that it includes: one or more processors; The processor is used to store one or more programs; When the one or more programs are executed by the one or more processors, the low-voltage DC short-circuit fault clearing method based on power line carrier communication as described in Embodiment 1 is implemented.

[0043] 12. A computer-readable storage medium, characterized in that it stores a computer program thereon, which, when executed, implements the low-voltage DC short-circuit fault clearing method based on power line carrier communication as described in Example 1.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention, as long as they do not depart from the spirit and scope of the technical solutions of the present invention, should be covered within the scope of the claims of the present invention.

[0045] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can 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.) containing computer-usable program code. The solutions in the embodiments of the present invention can be implemented using various computer languages, such as the object-oriented programming language Java and the interpreted scripting language JavaScript.

[0046] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0047] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0048] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0049] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the invention.

[0050] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A fatigue damage assessment method for ultra-high voltage hard jumper wires based on refined simulation, characterized in that, include: Collect the geometric and material properties of the UHV hard jumper wire, as well as the structural parameters of the corresponding clamps of the UHV hard jumper wire; Based on the collected geometric parameters, material properties, and structural parameters, a three-dimensional geometric model is established, including the jumper body segments of the UHV hard jumper and the corresponding matching clamps. The three-dimensional geometric model is then imported into finite element analysis software, and the material parameters, cross-sectional parameters, connection relationships, boundary conditions, and load conditions of the three-dimensional geometric model in the finite element analysis software are defined to generate a calculable finite element analysis model. According to different analysis conditions, the finite element model is solved by finite element method to obtain the stress distribution and strain state distribution under the corresponding analysis conditions. Based on the stress distribution of the finite element model under different analysis conditions, the target area in the jumper body segment of the UHV hard jumper in the finite element model is determined. The total damage of the target region is evaluated based on the stress distribution and strain state distribution of the target region under different analysis conditions in the finite element model.

2. The fatigue damage assessment method for refined simulation of UHV hard jumpers as described in claim 1, characterized in that, The geometric parameters include jumper-related parameters and stranded wire-related parameters. The parameters related to patch cords include the length of the patch cord body segments, the connection dimensions of the matching clamps, and the parameters of the stranded wire layer structure. The parameters related to the stranded wires include the number of individual strands, the diameter of a single wire, and the twist angle of each layer of the stranded wire. The material property parameters include Young's modulus, Poisson's ratio, and yield stress of each layer of strands.

3. The fatigue damage assessment method for refined simulation of UHV hard jumpers as described in claim 2, characterized in that, The three-dimensional geometric model of the jumper body segment is a refined model at the strand level, which is constructed layer by layer and strand by strand based on the single wire diameter and twist angle of each layer of strands. The length of the jumper body segment is 300mm to 600mm, and the matching clamp includes a drain plate and a pressure head; the three-dimensional geometric model shows the assembly relationship between the matching clamp and the jumper body segment.

4. The fatigue damage assessment method for refined simulation of ultra-high voltage hard jumpers as described in claim 1, characterized in that, The connection relationship includes at least the contact relationship between the strands in the three-dimensional geometric model and the crimping constraint relationship between the internal pressure head of the matching wire clamp and the jumper body; The boundary conditions include applying a fixed constraint to one end of the jumper body segment and applying a force load or displacement load reflecting the overall force of the jumper system to the other end.

5. The fatigue damage assessment method for refined simulation of ultra-high voltage hard jumpers as described in claim 1, characterized in that, The analysis conditions include jumper self-weight condition, wind load condition, and icing load condition. The analysis conditions also include combination conditions formed by combining at least two of the jumper self-weight condition, wind load condition, and icing load condition.

6. The fatigue damage assessment method for refined simulation of ultra-high voltage hard jumpers as described in claim 1, characterized in that, Based on the stress and strain distribution of the target region under different analysis conditions in the finite element model, the total damage of the target region is evaluated, including: Based on the stress distribution of the target region in the finite element model under different analysis conditions, the actual number of cycles of the target region at different stress levels is determined by combining the fatigue design method; based on the strain state distribution of the target region in the finite element model under different analysis conditions, the theoretical fatigue life cycle number of the target region at different stress levels is determined by combining the fatigue design method. The total damage to the target area is calculated based on the actual number of cycles at different stress levels and the theoretical fatigue life cycle number at different stress levels.

7. The fatigue damage assessment method for refined simulation of ultra-high voltage hard jumpers as described in claim 6, characterized in that, The total damage to the target area was calculated using the Miner linear cumulative damage criterion, and the mathematical expression for the total damage is as follows: In the formula, D represents the total damage; For the target area at stress level The actual number of cycles under the influence; For the target area at stress level Theoretical fatigue life cycle count; The stress level is indicated by the D value; fatigue failure is determined when the D value reaches or exceeds 1.

8. The fatigue damage assessment method for refined simulation of ultra-high voltage hard jumpers as described in claim 6, characterized in that, The theoretical fatigue life cycle number Based on the Manson-Coffin formula and the SN curve of the material, the expression of the Manson-Coffin formula is as follows: In the formula, To extract the total strain amplitude of the target region from the strain state distribution at the corresponding level under the corresponding analysis conditions; This is the fatigue strength coefficient; Young's modulus; This represents the theoretical fatigue life cycle count. The fatigue strength index; It is the fatigue ductility coefficient; It is the fatigue ductility index.

9. The fatigue damage assessment method for refined simulation of ultra-high voltage hard jumpers as described in claim 1, characterized in that, Based on the stress distribution of the finite element model under different analysis conditions, the target region in the jumper body segment of the UHV hard jumper in the finite element model is determined, including: taking the stress concentration region of the UHV hard jumper in the finite element model as the target region of the jumper body segment based on the stress distribution of the finite element model under different analysis conditions.

10. The fatigue damage assessment method for refined simulation of ultra-high voltage hard jumpers as described in claim 1, characterized in that, It also includes performing finite element solutions on the finite element model according to different analysis conditions to obtain the deformation state distribution of the finite element model under different analysis conditions; and adjusting the jumper length, hanging point position or hardware configuration of the UHV hard jumper line according to the stress distribution, strain distribution and deformation state distribution of the finite element model under different analysis conditions, combined with the total damage of the target area.

11. A fatigue damage assessment device for refined simulation of ultra-high voltage hard jumpers, characterized in that, include: The parameter acquisition module is used to acquire the geometric structure parameters and material property parameters of the UHV hard jumper, as well as the structural parameters of the corresponding matching clamps of the UHV hard jumper. The model building module is used to build a three-dimensional geometric model containing the jumper body segments and corresponding matching clamps of the UHV hard jumper wire based on the collected geometric structure parameters, material property parameters and structural parameters. The three-dimensional geometric model is then imported into the finite element analysis software, and the material parameters, section parameters, connection relationships, boundary conditions and load conditions of the three-dimensional geometric model in the finite element analysis software are defined to generate a calculable finite element analysis model. The solution and acquisition module is used to perform finite element solution on the finite element model according to different analysis conditions, obtain the stress distribution and strain state distribution under the corresponding analysis conditions, and determine the target area in the jumper body segment of the UHV hard jumper in the finite element model according to the stress distribution of the finite element model under different analysis conditions. The total damage of the target region is evaluated based on the stress distribution and strain state distribution of the target region under different analysis conditions in the finite element model.

12. A computer device, characterized in that, include: One or more processors; The processor is used to store one or more programs; When the one or more programs are executed by the one or more processors, the low-voltage DC short-circuit fault clearing method based on power line carrier communication as described in any one of claims 1 to 10 is implemented.

13. A computer-readable storage medium, characterized in that, It contains a computer program, which, when executed, implements the low-voltage DC short-circuit fault clearing method based on power line carrier communication as described in any one of claims 1 to 10.

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