Damaged cable moisture transverse diffusion simulation method, system, medium and equipment

Abstract

The invention discloses a method, a system, a medium and equipment for simulating moisture transverse diffusion of a damaged cable, and the method comprises the steps: obtaining the water absorption data of a cable material, and determining the humidity environment of an area where the cable is placed; according to the water absorption data of different materials, utilizing a Fick first law moisture diffusion model to calculate the moisture diffusion coefficient of each material in the humidity environment; constructing a moisture diffusion simulation model of the cable, and setting the moisture concentration of the damaged interface of the outer sheath of the cable as a boundary condition; simulating a diffusion process that water transversely diffuses into the cable from the damaged part of the outer sheath along with time when the cable is in a humidity environment; a section and a boundary probe are arranged according to a simulation result, and water absorption weight increment is obtained through simulation. Through the technical scheme of the invention, real-time monitoring and prediction of dynamic change of moisture in the cable can be realized, and technical support is provided for maintenance and fault prevention of the cable, so that potential damage to the cable is avoided.

Description

Technical Field

[0001] The present invention relates to the field of simulation optimization technology, and in particular to a method for simulating the lateral diffusion of moisture in a damaged cable, a system for simulating the lateral diffusion of moisture in a damaged cable, a computer-readable storage medium, and a computer device. Background Art

[0002] As the world's largest producer of cross-linked polyethylene (XLPE) cables, China continues to expand its cable production and usage, particularly in East and South China, which account for 65% of the nation's total inventory. These regions experience a uniquely hot and humid environment with an average annual relative humidity exceeding 80% and temperature fluctuations reaching 35°C, accelerating the aging process of water trees in cable insulation. Water trees are microscopic, dendritic defects that form in cable insulation over long periods of operation due to water penetration and electric field effects.

[0003] During the actual construction process, it is inevitable that the cable will be damaged during the laying process. The cable laying trench is often severely waterlogged and the ambient humidity is very high. This will cause the ambient moisture to diffuse from the damaged outer sheath to the cable body, causing abnormal heating of the cable during operation, which will cause serious damage to the transmission and distribution network.

[0004] Currently, existing traditional detection methods for cable moisture have many defects and face three technical barriers: first, contact detection requires stripping the cable outer sheath, causing irreparable physical damage (approximately 12% of test samples show mechanical performance degradation); second, the offline detection cycle is as long as 72 hours, during which time the power grid operation must be interrupted; third, single-point sampling data cannot reflect the dynamic process of moisture diffusion, and the deviation rate between the measured data and the actual state is as high as ±30%. Summary of the Invention

[0005] In response to the above problems, the present invention provides a method, system, medium and equipment for simulating the lateral diffusion of moisture in a damaged cable. By constructing a cable moisture diffusion simulation model after the outer sheath is damaged, it can simulate the process of moisture in a high-humidity environment diffusing into the interior of the cable over time under a specific cable trench laying environment. The water absorption and weight gain are used as the characteristic value to characterize the degree of moisture inside the cable. Real-time monitoring and prediction of the dynamic changes of moisture inside the cable can be achieved, providing technical support for cable maintenance and fault prevention, thereby avoiding potential damage to the cable.

[0006] To achieve the above object, the present invention provides a method for simulating the lateral diffusion of moisture in a damaged cable, comprising:

[0007] Obtain water absorption data of different materials used in cables to determine the humidity environment of the area where the cables are placed;

[0008] Based on the water absorption data of the different materials, the water diffusion coefficient of each material under the humidity environment is calculated using Fick's first law water diffusion model;

[0009] Constructing a moisture diffusion simulation model of the cable based on the moisture diffusion coefficient, and setting the moisture concentration at the interface of the damaged cable outer sheath as a boundary condition;

[0010] The moisture diffusion simulation model is used to simulate the diffusion process of moisture in the cable in the humidity environment, in which moisture diffuses laterally from the damaged portion of the outer sheath to the interior of the cable over time;

[0011] According to the simulation results of the water diffusion simulation model, cross-section and boundary probes are set to simulate the water absorption weight increment.

[0012] In the above technical solution, preferably, the specific process of obtaining the water absorption data of different materials used in the cable includes:

[0013] The different materials used in the cable were placed in different humidity environments for water absorption tests. The water absorption data of the corresponding materials were calculated based on the test results. The calculation formula for the water absorption rate W(t) is:

[0014]

[0015] Where m(t) is the mass of the material after absorbing water, and m0 is the initial mass of the material.

[0016] In the above technical solution, preferably, the water diffusion coefficient of each material in the humidity environment is calculated using Fick's first law water diffusion model based on the water absorption rate data of the different materials, and the specific process includes:

[0017] According to the water absorption data of the material, the moisture concentration C is calculated:

[0018]

[0019] Where ρ is the density of the material in kg / m 3 The unit of water concentration C is mol / m 3 ;

[0020] According to the water concentration, the water diffusion coefficient D is calculated:

[0021]

[0022] The unit of water diffusion coefficient D is m 2 / s, L is the thickness of the material, W ∞ is the equilibrium water absorption rate, and t is the time.

[0023] In the above technical solution, preferably, a moisture diffusion simulation model of the cable is constructed based on the moisture diffusion coefficient, and the moisture concentration at the interface where the cable outer sheath is damaged is set as a boundary condition. The specific process includes:

[0024] Setting the thickness and length of the cable in the dilute species transfer module of the multi-physics simulation software, and setting two working planes at the end faces at different positions to construct a simulation geometric model of the cable outer sheath damage;

[0025] Define a boundary probe for the geometric model and select the main insulation section, set the probe type to maximum value, and modify the probe expression to convert the drawing unit;

[0026] Adding a segmentation domain operation to the geometric model to perform a segmentation process on the geometric model to expose the internal structure;

[0027] The moisture concentration at the end face of the damaged outer sheath of the cable is used as a boundary condition.

[0028] In the above technical solution, preferably, the moisture diffusion simulation model is used to simulate the diffusion process of moisture from the damaged part of the outer sheath to the interior of the cable over time in the humidity environment. The specific process includes:

[0029] The moisture concentration value of the boundary condition is set according to the relative humidity of the environment, and calculations are performed to simulate the dynamic diffusion process of moisture diffusing laterally from the damaged area to the interior of the cable under the humidity environment.

[0030] In the above technical solution, preferably, cross-section and boundary probes are set according to the simulation results of the water diffusion simulation model to simulate and obtain the water absorption weight increment, and the specific process includes:

[0031] According to the simulation results of the water diffusion simulation model, a cross section at a specified position is added in the data set manager;

[0032] A data set is selected and coordinate parameters are set to determine the position of the main insulation section, boundary condition mapping is performed, and a moisture weight increment change curve of the main insulation section is generated.

[0033] The present invention further provides a system for simulating the lateral diffusion of moisture in a damaged cable, which uses the method for simulating the lateral diffusion of moisture in a damaged cable disclosed in any one of the above technical solutions, comprising:

[0034] A data acquisition module is used to obtain water absorption data of different materials used in the cable and determine the humidity environment of the area where the cable is placed;

[0035] a coefficient calculation module, configured to calculate the moisture diffusion coefficient of each material under the humidity environment using Fick's first law moisture diffusion model based on the moisture absorption rate data of the different materials;

[0036] A model building module is used to build a moisture diffusion simulation model of the cable based on the moisture diffusion coefficient, and set the moisture concentration at the interface of the damaged cable outer sheath as a boundary condition;

[0037] a diffusion simulation module, configured to simulate, by using the moisture diffusion simulation model, a diffusion process in which moisture diffuses laterally from the damaged portion of the outer sheath to the interior of the cable over time in the humidity environment;

[0038] The simulation calculation module is used to set cross-section and boundary probes according to the simulation results of the water diffusion simulation model to simulate and obtain the water absorption weight increment.

[0039] In the above technical solution, preferably, the coefficient calculation module is specifically used to:

[0040] According to the water absorption data of the material, the moisture concentration C is calculated:

[0041]

[0042] Where ρ is the density of the material in kg / m 3 The unit of water concentration C is mol / m 3 ;

[0043] According to the water concentration, the water diffusion coefficient D is calculated:

[0044]

[0045] The unit of water diffusion coefficient D is m 2 / s, L is the thickness of the material, W ∞ is the equilibrium water absorption rate, and t is the time.

[0046] The present invention also proposes a computer-readable storage medium, which stores at least one instruction. The at least one instruction is executed by a processor to implement the method for simulating the lateral diffusion of moisture in a damaged cable as disclosed in any of the above technical solutions.

[0047] The present invention also proposes a computer device, which includes a memory and a processor, wherein the memory is used to store at least one instruction, and the processor is used to execute the at least one instruction to implement the method for simulating the lateral diffusion of moisture in a damaged cable as disclosed in any one of the above technical solutions.

[0048] Compared with the existing technology, the beneficial effects of the present invention are: by constructing a cable moisture diffusion simulation model after the outer sheath is damaged, it is possible to simulate the process of moisture in a high-humidity environment diffusing into the interior of the cable over time under a specific cable trench laying environment, and use water absorption and weight gain as the characteristic value to characterize the degree of moisture inside the cable. It can realize real-time monitoring and prediction of the dynamic changes of moisture inside the cable, provide technical support for cable maintenance and fault prevention, and thus avoid potential damage to the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 A schematic flow chart of a method for simulating lateral diffusion of moisture in a damaged cable disclosed in an embodiment of the present invention;

[0050] Figure 2 The figure is a schematic diagram of a curve showing a numerical change in the weight increment of the cable main insulation absorbed by water according to an embodiment of the present invention. DETAILED DESCRIPTION

[0051] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0052] The present invention is described in further detail below with reference to the accompanying drawings:

[0053] like Figure 1 As shown, a method for simulating the lateral diffusion of moisture in a damaged cable provided by the present invention includes:

[0054] Obtain water absorption data of different materials used in cables to determine the humidity environment of the area where the cables are placed;

[0055] Based on the water absorption data of different materials, the water diffusion coefficient of each material in a humid environment is calculated using Fick's first law water diffusion model;

[0056] A moisture diffusion simulation model for cables is constructed based on the moisture diffusion coefficient, and the moisture concentration at the interface where the cable outer sheath is damaged is set as the boundary condition.

[0057] The moisture diffusion simulation model is used to simulate the diffusion process of moisture from the damaged outer sheath to the interior of the cable over time in a humid environment.

[0058] According to the simulation results of the water diffusion simulation model, cross-section and boundary probes are set to simulate the water absorption weight increase.

[0059] In this embodiment, by constructing a cable moisture diffusion simulation model after the outer sheath is damaged, it is possible to simulate the process of moisture in a high-humidity environment diffusing into the interior of the cable over time under a specific cable trench laying environment. The water absorption and weight gain are used as characteristic values ​​to characterize the degree of moisture inside the cable. This enables real-time monitoring and prediction of the dynamic changes in moisture inside the cable, providing technical support for cable maintenance and fault prevention, thereby avoiding potential damage to the cable.

[0060] Among them, a dynamic evaluation platform with multi-dimensional coupling of environmental humidity, material properties and structural design was realized, which simulated the lateral diffusion process of moisture under the condition of cable outer sheath damage, realized the quantitative evaluation of lateral moisture diffusion under cable damage conditions, and promoted the transformation of insulation detection from "offline sampling" to "online prediction", which significantly improved the competitiveness of cable products and provided key technical guarantees for the safe operation of smart grids.

[0061] Furthermore, non-contact detection can avoid secondary damage to cables caused by physical inspection, support multi-parameter coupling analysis of collaborative calculation of multiple variables such as environmental temperature and humidity, and damage location, and reduce the analysis cycle by more than 60% compared with traditional methods. Through dynamic streamline diagrams and concentration distribution diagrams, the moisture diffusion path and distribution pattern can be displayed in real time.

[0062] Specifically, this method, based on a multi-physics simulation platform, assumes that a 110kV single-core XLPE cable is used as the research object. A moisture diffusion simulation model is constructed to examine the changes in moisture diffusion within the cable under high humidity conditions when the outer sheath is damaged. The cable's main insulation material is sliced ​​to ensure that the surface areas of each sample are basically the same, and the variation pattern of moisture concentration within the cable at the damaged location is explored. Based on the simulation results, the water absorption weight increase of the cable's main insulation after being exposed to moisture can be calculated based on the special performance test requirements of various thermosetting insulation compounds in the national standard GB / T 12706.2-2020, "Extruded insulated power cables and accessories with rated voltages of 1kV (Um=1.2kV) to 35kV (Um=40.5kV) Part 2: Cables with rated voltages of 6kV (Um=7.2kV) to 30kV (Um=36kV)", to verify whether it meets the requirements of the national standard GB / T12706.2-2020.

[0063] In the above embodiment, preferably, the specific process of obtaining the water absorption data of different materials used in the cable includes:

[0064] The different materials used in the cable are placed in different humidity environments for water absorption tests. The water absorption data of the corresponding materials, that is, the water absorption weight gain rate, are calculated based on the test results. The calculation formula for the water absorption rate W(t) is:

[0065]

[0066] Where m(t) is the mass of the material after absorbing water, and m0 is the initial mass of the material.

[0067] In the above embodiment, preferably, based on the water absorption data of different materials, the water diffusion coefficient of each material in a humid environment is calculated using Fick's first law water diffusion model. The specific process includes:

[0068] According to the water absorption data of the material, the moisture concentration C is calculated:

[0069]

[0070] Where ρ is the density of the material in kg / m 3 The unit of water concentration C is mol / m 3 ;

[0071] According to the water concentration, the water diffusion coefficient D is calculated:

[0072]

[0073] The unit of water diffusion coefficient D is m 2 / s, L is the thickness of the material, W ∞ is the equilibrium water absorption rate, and t is the time.

[0074] In the above embodiment, preferably, a moisture diffusion simulation model of the cable is constructed based on the moisture diffusion coefficient, and the moisture concentration at the interface where the cable outer sheath is damaged is set as a boundary condition. The specific process includes:

[0075] In the dilute species transport module of the multi-physics simulation software, the thickness and length of the cable were set, and two working planes were set at different end faces to construct a simulation geometric model of cable sheath damage.

[0076] Define a boundary probe for the geometry model and select the main insulation section, set the probe type to maximum, and modify the probe expression to convert the drawing units;

[0077] Add a segmentation domain operation to the geometric model to split the geometric model to expose the internal structure, so that the moisture concentration distribution can be observed more intuitively;

[0078] The moisture concentration at the end face of the damaged cable sheath is used as the boundary condition.

[0079] Specifically, first select the dilute species transfer module in the chemical substance transfer module in the multi-physics field simulation software to establish a geometric model of cable outer sheath damage. Taking a single-core cable as an example, the internal structure of the cable is, from the inside to the outside, copper core, XLPE, semi-conductive rubber, metal shielding layer and outer sheath. In the thickness setting, the geometric model is set according to the thickness actually measured on site. Set two working planes at different positions in the geometric model. The planes are parallel to the cable end section, that is, parallel to the cable transverse section. The part between the two sections is the damaged part of the outer sheath. Therefore, according to the actual damaged position, enter the position coordinates in the Z coordinate column of the plane definition to define the position of the damaged part.

[0080] Define the boundary probe through the multi-physics simulation software definition module, select the main insulation section, select the maximum value for the probe type, and modify the probe expression to: c2*18[g / mol]*1[m]. This method can change the drawing unit to mg / cm 2 , that is, the weight increase due to water absorption on the main insulation.

[0081] Among them, in order to visually observe the moisture concentration distribution after the outer sheath of the cable is damaged, a split domain can be added to the geometry module to split the cable geometry. Through the domain splitting function, a part of the cable model is cut along the axial direction, and an exposed section is generated at the damaged part to simulate the outer sheath damage scenario. In this way, the visualization effect is improved, and a boundary layer mesh (thickness 0.1mm) is set on the split interface to control the unit size of the key area of ​​the insulation layer within 0.2mm to ensure more accurate calculation of the simulation model. Zero flux boundary conditions are applied to the outer surface of the undamaged area of ​​the material to prevent moisture from diffusing from the non-damaged area. The time step adaptive calculation (0~24h) is performed through the transient solver, with a minimum step size of 1min. The progressive penetration process of moisture in the insulation layer with the diffusion coefficient can be captured to achieve visual monitoring of moisture migration.

[0082] In the above embodiment, preferably, a moisture diffusion simulation model is used to simulate the diffusion process of moisture from the damaged outer sheath to the interior of the cable over time in a humid environment. The specific process includes:

[0083] The moisture concentration value of the boundary condition is set according to the relative humidity of the environment, and calculations are performed to simulate the dynamic diffusion process of moisture diffusing laterally from the damaged area to the interior of the cable under this humidity environment.

[0084] In the above embodiment, preferably, cross-section and boundary probes are set according to the simulation results of the water diffusion simulation model to simulate the water absorption weight increment. The specific process includes:

[0085] For the simulation results of the water diffusion simulation model, add a cross section at a specified location in the dataset manager;

[0086] In the Data Set section, select the data set and set the Z coordinate parameters. The Z coordinate parameters can determine the position of the main insulation section.

[0087] Select Probe Drawing in the Research Probe column, click the Boundary Condition column, and then click Draw to execute the boundary condition drawing to generate the moisture weight increment change curve of the main insulation section.

[0088] During the implementation process, several monitoring surfaces with an interval of 5 cm were generated along the cable axis (Z axis). Combined with tetrahedral meshing (minimum unit 0.1 mm), the moisture distribution in the insulation layer was displayed, and the process of moisture diffusion from the damaged end to the inside could be visually observed.

[0089] like Figure 2 The visualization of the weight gain of the cable's main insulation after sheath damage, as shown in the figure, provides a visual representation of the path characteristics and concentration distribution of water lateral diffusion in the event of outer sheath damage. This graphical method not only enables an intuitive assessment of the water absorption behavior of a damaged cable but also provides a quantitative basis for evaluating the anti-permeation performance of different material combinations and structural designs through comparative analysis under multiple operating conditions.

[0090] Next, select Probe Plot in the Research Probe column, click the Boundary Condition column, and then click Plot. This will display a graph showing the weight gain of the cable's main insulation at that section. Comparing this to the national standard GB / T 12706.2-2020, a horizontal line parallel to the X-axis can be drawn to determine whether the weight gain exceeds the specified value, thereby determining whether dehumidification is necessary.

[0091] The present invention further provides a system for simulating the lateral diffusion of moisture in a damaged cable, which uses the method for simulating the lateral diffusion of moisture in a damaged cable disclosed in any one of the above embodiments, comprising:

[0092] The data acquisition module is used to obtain the water absorption data of different materials used in the cable and determine the humidity environment of the area where the cable is placed;

[0093] The coefficient calculation module is used to calculate the moisture diffusion coefficient of each material in a humidity environment using Fick's first law moisture diffusion model based on the water absorption data of different materials;

[0094] The model building module is used to build a moisture diffusion simulation model of the cable based on the moisture diffusion coefficient and set the moisture concentration at the interface of the cable outer sheath damage as the boundary condition;

[0095] The diffusion simulation module is used to simulate the diffusion process of moisture from the damaged outer sheath to the interior of the cable over time in a humid environment using a moisture diffusion simulation model.

[0096] The simulation calculation module is used to set cross-section and boundary probes according to the simulation results of the water diffusion simulation model to simulate the water absorption weight increase.

[0097] In the above implementation, preferably, the coefficient calculation module is specifically used to:

[0098] According to the water absorption data of the material, the moisture concentration C is calculated:

[0099]

[0100] Where ρ is the density of the material in kg / m 3 The unit of water concentration C is mol / m 3 ;

[0101] According to the water concentration, the water diffusion coefficient D is calculated:

[0102]

[0103] The unit of water diffusion coefficient D is m 2 / s, L is the thickness of the material, W ∞ is the equilibrium water absorption rate, and t is the time.

[0104] According to the moisture lateral diffusion simulation system for a damaged cable disclosed in the above embodiment, the functions to be implemented by each module thereof correspond to the steps of the moisture lateral diffusion simulation method for a damaged cable disclosed in the above embodiment. During implementation, operations are performed with reference to the above embodiment, which will not be repeated here.

[0105] The present invention also provides a computer-readable storage medium storing at least one instruction, which is executed by a processor to implement the method for simulating the lateral diffusion of moisture in a damaged cable as disclosed in any one of the above embodiments.

[0106] The present invention also proposes a computer device, which includes a memory and a processor, the memory being used to store at least one instruction, and the processor being used to execute at least one instruction to implement the method for simulating the lateral diffusion of moisture in a damaged cable as disclosed in any one of the above embodiments.

[0107] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A method for simulating the lateral diffusion of moisture in a damaged cable, characterized in that: include: Obtain water absorption data of different materials used in cables to determine the humidity environment of the area where the cables are placed; Based on the water absorption data of the different materials, the water diffusion coefficient of each material under the humidity environment is calculated using Fick's first law water diffusion model; Constructing a moisture diffusion simulation model of the cable based on the moisture diffusion coefficient, and setting the moisture concentration at the interface of the damaged cable outer sheath as a boundary condition; The moisture diffusion simulation model is used to simulate the diffusion process of moisture in the cable in the humidity environment, in which moisture diffuses laterally from the damaged portion of the outer sheath to the interior of the cable over time; According to the simulation results of the water diffusion simulation model, cross-section and boundary probes are set to simulate the water absorption weight increment.

2. The method for simulating the lateral diffusion of moisture in a damaged cable according to claim 1, characterized in that: The specific process of obtaining the water absorption data of different materials used in the cable includes: The different materials used in the cable were placed in different humidity environments for water absorption tests. The water absorption data of the corresponding materials were calculated based on the test results. The calculation formula for the water absorption rate W(t) is: Where m(t) is the mass of the material after absorbing water, and m0 is the initial mass of the material.

3. The method for simulating the lateral diffusion of moisture in a damaged cable according to claim 2, characterized in that: The water diffusion coefficient of each material in the humidity environment is calculated using the Fick's first law water diffusion model based on the water absorption rate data of the different materials. The specific process includes: According to the water absorption data of the material, the moisture concentration C is calculated: Where ρ is the density of the material in kg / m 3 The unit of water concentration C is mol / m 3 ; According to the water concentration, the water diffusion coefficient D is calculated: The unit of water diffusion coefficient D is m 2 / s, L is the thickness of the material, W ∞ is the equilibrium water absorption rate, and t is the time.

4. The method for simulating the lateral diffusion of moisture in a damaged cable according to claim 2, characterized in that: A moisture diffusion simulation model of the cable is constructed based on the moisture diffusion coefficient, and the moisture concentration at the interface where the cable outer sheath is damaged is set as a boundary condition. The specific process includes: Setting the thickness and length of the cable in the dilute species transfer module of the multi-physics simulation software, and setting two working planes at the end faces at different positions to construct a simulation geometric model of the cable outer sheath damage; Define a boundary probe for the geometric model and select the main insulation section, set the probe type to maximum value, and modify the probe expression to convert the drawing unit; Adding a segmentation domain operation to the geometric model to perform a segmentation process on the geometric model to expose the internal structure; The moisture concentration at the end face of the damaged outer sheath of the cable is used as a boundary condition.

5. The method for simulating the lateral diffusion of moisture in a damaged cable according to claim 4, characterized in that: The moisture diffusion simulation model is used to simulate the diffusion process of moisture from the damaged part of the outer sheath to the interior of the cable over time in the humidity environment. The specific process includes: The moisture concentration value of the boundary condition is set according to the relative humidity of the environment, and calculations are performed to simulate the dynamic diffusion process of moisture diffusing laterally from the damaged area to the interior of the cable under the humidity environment.

6. The method for simulating the lateral diffusion of moisture in a damaged cable according to claim 5, characterized in that: According to the simulation results of the water diffusion simulation model, cross-section and boundary probes are set to simulate the water absorption weight increment. The specific process includes: According to the simulation results of the water diffusion simulation model, a cross section at a specified position is added in the data set manager; A data set is selected and coordinate parameters are set to determine the position of the main insulation section, boundary condition mapping is performed, and a moisture weight increment change curve of the main insulation section is generated.

7. A system for simulating the lateral diffusion of moisture in damaged cables, characterized in that: The method for simulating the lateral diffusion of moisture in a damaged cable according to any one of claims 1 to 6 comprises: A data acquisition module is used to obtain water absorption data of different materials used in the cable and determine the humidity environment of the area where the cable is placed; a coefficient calculation module, configured to calculate the moisture diffusion coefficient of each material under the humidity environment using Fick's first law moisture diffusion model based on the moisture absorption rate data of the different materials; A model building module is used to build a moisture diffusion simulation model of the cable based on the moisture diffusion coefficient, and set the moisture concentration at the interface of the damaged cable outer sheath as a boundary condition; a diffusion simulation module, configured to simulate, by using the moisture diffusion simulation model, a diffusion process in which moisture diffuses laterally from the damaged portion of the outer sheath to the interior of the cable over time in the humidity environment; The simulation calculation module is used to set cross-section and boundary probes according to the simulation results of the water diffusion simulation model to simulate and obtain the water absorption weight increment.

8. The system for simulating the lateral diffusion of moisture in damaged cables according to claim 7, characterized in that: The coefficient calculation module is specifically used for: According to the water absorption data of the material, the moisture concentration C is calculated: Where ρ is the density of the material in kg / m 3 The unit of water concentration C is mol / m 3 ; According to the water concentration, the water diffusion coefficient D is calculated: The unit of water diffusion coefficient D is m 2 / s, L is the thickness of the material, W ∞ is the equilibrium water absorption rate, and t is the time.

9. A computer-readable storage medium, characterized in that The computer-readable storage medium stores at least one instruction, which is executed by a processor to implement the method for simulating lateral moisture diffusion in a damaged cable according to any one of claims 1 to 6.

10. A computer device, characterized in that: The computer device includes a memory and a storage, the memory is used to store at least one instruction, and the processor is used to execute the at least one instruction to implement the method for simulating lateral diffusion of moisture in a damaged cable according to any one of claims 1 to 6.

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