Methods, devices, equipment and storage media for determining cable overload cycle

Abstract

This application provides a method, apparatus, device, and storage medium for determining the overload cycle of a cable. The method includes: constructing a finite element simulation model of a submarine cable, and using the finite element simulation model, performing the following steps: determining the steady-state initial temperature field of the submarine cable under rated current with different light load ratios; adjusting the current of the submarine cable to apply rated current with different overload ratios; obtaining the overload duration of the submarine cable rising to multiple preset upper limit temperatures based on any steady-state initial temperature field; adjusting the current of the submarine cable to the rated current corresponding to the light load ratio of the steady-state initial temperature field; obtaining the cooling duration of the submarine cable falling to the steady-state initial temperature field based on each preset upper limit temperature; and determining the overload cycle of the submarine cable according to the overload duration and cooling duration corresponding to each preset upper limit temperature, thereby enabling the determination of the overload cycle of the submarine cable.

Description

Technical Field

[0001] This application relates to the field of submarine cable overload simulation technology, and in particular to a method, apparatus, equipment and storage medium for determining cable overload period. Background Technology

[0002] Submarine cables are power transmission facilities laid on the seabed. Due to their high transmission efficiency and low loss, they have become a key power transmission carrier connecting offshore wind farms and onshore power grids. However, because the operating environment of offshore wind farms is complex and variable, submarine cables need to frequently cope with short-term overload conditions.

[0003] However, there is currently no effective simulation method for determining the overload period of submarine cables under short-term overload conditions. Therefore, there is an urgent need for a method capable of performing frequent short-term overload conditions to determine the corresponding overload period of submarine cables. Summary of the Invention

[0004] This application provides a method, apparatus, equipment, and storage medium for determining the overload period of a cable, in order to solve the problem that there is no effective simulation method for determining the overload period of a submarine cable under short-term overload conditions.

[0005] In a first aspect, this application provides a method for determining cable overload period, applied to electronic equipment, including:

[0006] Construct a finite element simulation model for the submarine cable, and then execute the following steps using the finite element simulation model according to a preset simulation duration:

[0007] Determine the steady-state initial temperature field of the submarine cable under rated current with different light load ratios;

[0008] The current of the submarine cable is adjusted to apply rated current with different overload ratios;

[0009] After adjusting the current to the rated current for each overload ratio, the overload duration of the submarine cable, which is then increased to multiple preset upper limit temperatures, is obtained based on any steady-state initial temperature field.

[0010] After the temperature of the submarine cable rises to each preset upper limit temperature, the current of the submarine cable is adjusted to the rated current corresponding to the light load ratio of the steady-state initial temperature field.

[0011] After adjusting the current to the rated current of the light load ratio, the submarine cable is obtained, and the cooling duration is reduced to the steady-state initial temperature field based on each preset upper limit temperature.

[0012] The overload cycle corresponding to the submarine cable is determined based on the overload duration and cooling duration corresponding to each preset upper limit temperature.

[0013] In one possible design, determining the steady-state initial temperature field of the submarine cable under rated current with different light load ratios includes: determining the bottleneck section operating condition information of the submarine cable; determining the corresponding boundary conditions based on the bottleneck section operating condition information; and determining the steady-state initial temperature field of the submarine cable under rated current with different light load ratios based on the boundary conditions.

[0014] In one possible design, constructing the finite element simulation model corresponding to the submarine cable includes: acquiring multi-layer structural data of the submarine cable and constructing a geometric model of the submarine cable based on the multi-layer structural data; configuring parameters for each structural data to obtain multiple corresponding physical parameters; and generating a corresponding finite element simulation model based on the multiple physical parameters corresponding to each structural data and the geometric model.

[0015] In one possible design, the multilayer structure data sequentially includes one or more of the following structural data: conductor data, insulation layer data, metal sheath data, armor layer data, and outer sheath data.

[0016] In one possible design, the method further includes: determining the corresponding insulation material based on the insulation layer data; determining the corresponding material aging characteristics based on the insulation material; and adjusting each preset upper limit temperature based on the material aging characteristics and the operating time of the submarine cable to obtain each dynamic upper limit temperature.

[0017] In one possible design, after determining the overload cycle corresponding to the submarine cable based on the overload duration and cooling duration corresponding to each preset upper limit temperature, the method further includes: determining the number of overload cycles throughout the year based on the overload cycle; determining the overload time percentage corresponding to the submarine cable based on the overload duration and cooling duration corresponding to each preset upper limit temperature; and determining the cumulative overload duration throughout the year based on the overload time percentage.

[0018] In one possible design, the method further includes: determining the overload cycle, overload time percentage, number of overload cycles per year, and total overload duration for each preset upper limit temperature corresponding to each steady-state initial temperature field of the submarine cable; and generating an annual overload cycle data table for the submarine cable based on each overload cycle, each overload time percentage, each number of overload cycles per year, and each total overload duration.

[0019] Secondly, this application provides a cable overload cycle determination device, applied to electronic equipment, comprising:

[0020] The construction module is used to build a finite element simulation model corresponding to the submarine cable, and then, using the finite element simulation model, executes the following steps according to a preset simulation duration:

[0021] The first determining module is used to determine the steady-state initial temperature field of the submarine cable under rated current with different light load ratios.

[0022] The first adjustment module is used to adjust the current of the submarine cable to apply rated current with different overload ratios.

[0023] The first acquisition module is used to acquire the overload duration of the submarine cable after adjusting the current to the rated current of each overload ratio, based on any steady-state initial temperature field, and the overload duration of the cable rising to multiple preset upper limit temperatures.

[0024] The second adjustment module is used to adjust the current of the submarine cable to the rated current corresponding to the light load ratio of the steady-state initial temperature field after the temperature of the submarine cable rises to each preset upper limit temperature.

[0025] The second acquisition module is used to acquire the submarine cable after adjusting the current to the rated current of the light load ratio, and to acquire the cooling duration of the cable to the steady-state initial temperature field based on each preset upper limit temperature.

[0026] The second determining module is used to determine the overload cycle corresponding to the submarine cable based on the overload duration and cooling duration corresponding to each preset upper limit temperature.

[0027] Thirdly, this application provides an electronic device, including: at least one processor and a memory;

[0028] The memory stores computer-executed instructions;

[0029] The at least one processor executes computer execution instructions stored in the memory, causing the at least one processor to perform the cable overload cycle determination method as described in the first aspect and various possible designs of the first aspect.

[0030] Fourthly, this application provides a computer storage medium storing computer execution instructions, which, when executed by a processor, implement the cable overload cycle determination method described in the first aspect and various possible designs of the first aspect.

[0031] The cable overload cycle determination method, apparatus, equipment, and storage medium provided in this application construct a finite element simulation model corresponding to the submarine cable, and then execute the following steps according to a preset simulation duration using the finite element simulation model: determining the steady-state initial temperature field of the submarine cable under rated currents with different light load ratios; adjusting the current of the submarine cable to apply rated currents with different overload ratios; after adjusting the current to the rated current for each overload ratio, acquiring the overload duration of the submarine cable rising to multiple preset upper limit temperatures based on any steady-state initial temperature field; and after the temperature of the submarine cable rises to each preset upper limit temperature, adjusting the current of the submarine cable to the steady-state initial temperature. The rated current corresponds to the light load ratio. After adjusting the current to the light load ratio of the rated current, the cooling duration of the submarine cable to the steady-state initial temperature field is obtained based on each preset upper limit temperature. The overload cycle of the submarine cable is determined according to the overload duration and cooling duration corresponding to each preset upper limit temperature. By simulating the overload duration and subsequent cooling duration at each preset upper limit temperature under frequent short-term overload conditions based on the steady-state initial temperature field of the rated current at any light load ratio, the overload cycle of the submarine cable is determined, making it easy to determine the overload cycle of the submarine cable at any light load ratio of the rated current. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram illustrating an application scenario of the cable overload cycle determination method provided in the embodiments of this application;

[0034] Figure 2 A flowchart illustrating the cable overload period determination method provided in this application embodiment. Figure 1 ;

[0035] Figure 3 100% of the I provided for the embodiments of this application o A diagram showing the corresponding overload duration and cooling duration;

[0036] Figure 4 A flowchart illustrating the cable overload period determination method provided in this application embodiment. Figure 2 ;

[0037] Figure 5 This is a schematic diagram of the cable overload cycle determination device provided in the embodiments of this application;

[0038] Figure 6 This is a schematic diagram of the hardware structure of the electronic device provided in the embodiments of this application. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0040] Submarine cables, power transmission facilities laid on the seabed, have become a key transmission carrier connecting offshore wind farms and onshore power grids due to their high transmission efficiency and low loss. However, because the operating environment of offshore wind farms is complex and variable, submarine cables need to frequently cope with short-term overload conditions. Currently, however, there is no effective simulation method to determine the overload period of submarine cables corresponding to short-term overload conditions. Therefore, there is an urgent need for a method capable of performing frequent short-term overload conditions to determine the corresponding overload period of submarine cables.

[0041] To address the aforementioned technical problems, this application proposes the following technical concept: Considering the constructed finite element simulation model, based on the steady-state initial temperature field of the submarine cable under rated currents with different light load ratios, the inventors use any steady-state initial temperature field to determine the overload duration after the current is adjusted to the rated current of each overload ratio, and the cooling duration at each preset upper limit temperature, which is then reduced to the steady-state initial temperature field. Based on the overload duration and cooling duration corresponding to each preset upper limit temperature, the overload cycle corresponding to the submarine cable is determined, making it easy to determine the overload cycle corresponding to the submarine cable.

[0042] Figure 1 This is a schematic diagram illustrating an application scenario of the cable overload cycle determination method provided in this application embodiment.

[0043] like Figure 1 As shown, the scene includes a display terminal 101 and an electronic device 102.

[0044] The display terminal 101 can be a display screen or a personal computer or other terminal.

[0045] Electronic device 102 can be a standalone device or a cluster of multiple devices.

[0046] Electronic device 102 constructs a corresponding finite element simulation model based on the submarine cable, and performs the following steps according to a preset simulation duration using the finite element simulation model: determining the steady-state initial temperature field of the submarine cable under rated currents with different light load ratios; adjusting the current of the submarine cable to apply rated currents with different overload ratios; after adjusting the current to the rated current of each overload ratio, acquiring the submarine cable and, based on any steady-state initial temperature field, measuring the overload duration for which the temperature rises to multiple preset upper limit temperatures; after the temperature of the submarine cable rises to each preset upper limit temperature, adjusting the current of the submarine cable to the rated current with the light load ratio corresponding to the steady-state initial temperature field; after adjusting the current to the rated current with the light load ratio, acquiring the submarine cable and, based on each preset upper limit temperature, measuring the cooling duration for which the temperature drops to the steady-state initial temperature field; determining the corresponding overload cycle of the submarine cable based on the overload duration and cooling duration corresponding to each preset upper limit temperature, and outputting it to display terminal 101. Detailed embodiments are described below.

[0047] Figure 2 A flowchart illustrating the cable overload period determination method provided in this application embodiment. Figure 1 The execution entity in this embodiment can be Figure 1 The electronic devices shown in the illustrated embodiments are not specifically limited in this embodiment. Figure 2 As shown, the method includes:

[0048] S201: Construct a finite element simulation model for the submarine cable, and then, using the finite element simulation model, execute the following steps according to the preset simulation duration:

[0049] In this embodiment, the submarine cable can be a submarine cable or other submarine cables.

[0050] In this embodiment, the preset simulation duration can be any of 100 hours, 150 hours, or 216 hours, or other durations.

[0051] The 216 hours refers to the maximum permissible overload operating time for submarine cables as specified in the standard ICEA-S-108-720-2018.

[0052] Specifically, step S201 involves constructing the finite element simulation model corresponding to the submarine cable, which includes steps a~c:

[0053] Step a: Obtain multi-layer structure data of the submarine cable and construct a geometric model of the submarine cable based on the multi-layer structure data.

[0054] In this embodiment, the multilayer structure data includes one or more of the following structure data in sequence: conductor data, insulation layer data, metal sheath data, armor layer data, and outer sheath data.

[0055] The structural data for each layer is used to describe information such as the material and dimensions of the corresponding structure.

[0056] In this embodiment, the geometric model is a two-dimensional or axisymmetric geometric model.

[0057] Step b: Configure the parameters of each structural data to obtain the corresponding multiple physical parameters.

[0058] In this embodiment, multiple physical parameters include thermal conductivity, resistivity, specific heat capacity, and density.

[0059] Step c: Generate the corresponding finite element simulation model based on the multiple physical parameters and geometric models corresponding to each structural data.

[0060] In this embodiment, the finite element simulation model can be a DC submarine cable thermo-electric coupling model, or other simulation models.

[0061] The thermal-electric coupling model of the DC submarine cable was generated by finite element simulation software.

[0062] Among them, the finite element simulation software is a simulation software with transient thermo-electric coupling finite element analysis capability.

[0063] In addition, the finite element simulation model can be downgraded and replaced. That is, for the need for rapid evaluation, an equivalent thermal path lumped parameter model can be established based on the finite element simulation results, and the subsequent repetitive transient simulation can be replaced by analytical methods to greatly improve the calculation speed.

[0064] S202: Determine the steady-state initial temperature field of the submarine cable under rated current with different light load ratios.

[0065] Specifically, step S202 includes steps a~c:

[0066] Step a: Determine the operating conditions of the bottleneck section of the submarine cable.

[0067] In this embodiment, bottleneck section operating condition information, in submarine cable engineering, usually refers to the critical cable section in the system that limits the overall transmission capacity, reliability or efficiency, and its operating condition information can affect the overall performance of the project.

[0068] Step b: Determine the corresponding boundary conditions based on the bottleneck section operating condition information.

[0069] In this embodiment, the boundary conditions include seawater temperature and soil thermal resistivity, etc.

[0070] In addition, simplified equivalent convective heat transfer boundaries or more complex fluid-solid coupling models can be used to simulate the temperature stratification effect of deep seawater in place of boundary conditions.

[0071] Step c: Determine the steady-state initial temperature field of the submarine cable under rated current with different light load ratios based on the boundary conditions.

[0072] Specifically, based on the boundary conditions, the steady-state initial temperature field of the submarine cable under rated current with different light load ratios is solved according to the steady-state heat conduction equation.

[0073] In this embodiment, the rated current is determined by international standards and project design specifications.

[0074] For example, the rated current is I o .

[0075] For example, the rated current of I with different light load ratios is 60%. o 80% of I o and 100% of I o .

[0076] S203: Adjust the current of the submarine cable to apply rated current with different overload ratios.

[0077] Specifically, the current of the submarine cable is adjusted to apply rated currents with different overload ratios to simulate wind farm load fluctuations.

[0078] For example, the rated current of I with different overload ratios is 110%. o 120% of I o and 130% of I o .

[0079] The rated current for each overload ratio is the short-term overload current.

[0080] S204: After adjusting the current to the rated current for each overload ratio, obtain the overload duration of the submarine cable, based on any steady-state initial temperature field, for each of the multiple preset upper limit temperatures.

[0081] For example, any steady-state initial temperature field is the steady-state initial temperature field under 100% of the rated current.

[0082] For example, the steady-state initial temperature field at 100% of the rated current is 67°C.

[0083] For example, the preset upper limit temperatures are 70°C, 80°C and 90°C.

[0084] For example, taking 70°C as an example, the overload duration of the submarine cable rising to 70°C is x1.

[0085] In addition, steps a~d are included after step S204:

[0086] Step a: Determine the corresponding insulation material based on the insulation layer data.

[0087] For example, the insulating layer material is cross-linked polyethylene.

[0088] Step b: Determine the corresponding material aging characteristics based on the insulation layer material.

[0089] Step c: Adjust the preset upper limit temperature according to the material aging characteristics and the operating time of the submarine cable to obtain the dynamic upper limit temperature.

[0090] Specifically, step c includes steps c1 to c2:

[0091] Step c1: Calculate the real-time upper limit temperature of the submarine cable based on the material aging characteristics and the operating time of the submarine cable using the Arrhenius formula.

[0092] Step c2: Adjust each preset upper limit temperature according to each real-time upper limit temperature to obtain each dynamic upper limit temperature.

[0093] S205: After the temperature of the submarine cable rises to each preset upper limit temperature, adjust the current of the submarine cable to the rated current corresponding to the light load ratio of the steady-state initial temperature field.

[0094] For example, the steady-state initial temperature field corresponds to a rated current of 100% for a light load ratio of I. o .

[0095] S206: After adjusting the current to the rated current of the light load ratio, obtain the cooling duration of the submarine cable, based on each preset upper limit temperature, to the steady-state initial temperature field.

[0096] Specifically, the transient solver is used to obtain the cooling duration of the submarine cable, based on each preset upper limit temperature, to the steady-state initial temperature field.

[0097] The allowable deviation range for the steady-state initial temperature field is ±0.5℃.

[0098] For example, a submarine cable is obtained, with the cooling duration of 70°C to 67°C ± 0.5°C being x2.

[0099] For example, Figure 3 100% of I o A diagram showing the corresponding overload duration and cooling duration.

[0100] like Figure 3 As shown, a coordinate system is used, with the horizontal axis representing time (h), lasting 216 hours, and the vertical axis representing temperature (°C), ranging from 65°C to 100°C. The coordinate system includes red, yellow, and black curves; the red curve represents 130% of I.o , the yellow curve represents 120% of I o , the black curve represents 110% of I o .

[0101] It can be seen that the red curve reaches the preset upper limit temperatures of 70°C, 80°C, and 90°C respectively; the yellow curve reaches the preset upper limit temperatures of 70°C and 80°C respectively; the black curve only reaches the preset upper limit temperature of 70°C.

[0102] In addition, the steady-state initial temperature field in S206 can be replaced with: a safety threshold or a temperature reference point before the start of any overload period.

[0103] Exemplarily, the safety threshold is 50°C.

[0104] S207: Determine the overload period corresponding to the submarine cable according to the overload duration and the cooling duration corresponding to each preset upper limit temperature.

[0105] Exemplarily, when the preset upper limit temperature is 70°C, the calculation formula for determining the overload period corresponding to the submarine cable according to the overload duration and the cooling duration corresponding to each preset upper limit temperature is:

[0106]

[0107] In the formula, the overload period of the submarine cable, in hours.

[0108] In addition, after step S207, there are also steps a to c:

[0109] Step a: Determine the annual number of overload periods according to the overload period.

[0110] Exemplarily, when the preset upper limit temperature is 70°C, the calculation formula for determining the annual number of overload periods according to the overload period is:

[0111]

[0112] In the formula, is the annual number of overload periods; is the total number of hours in a year; represents the floor function operation.

[0113] In addition, if considering that continuous and non-stop overload cannot be achieved in actual operation, a safety factor k (0 < k < 1) can be introduced, that is, the corresponding calculation formula is:

[0114]

[0115] Step b: Determine the overload time percentage for the submarine cable based on the overload duration and cooling duration corresponding to each preset upper limit temperature.

[0116] For example, when the preset upper limit temperature is 70°C, the formula for determining the proportion of overload time for the submarine cable based on the overload duration and cooling duration corresponding to each preset upper limit temperature is as follows:

[0117]

[0118] In the formula, This represents the percentage of overload time corresponding to the submarine cable.

[0119] Step c: Determine the total annual overload duration based on the percentage of overload time.

[0120] For example, when the preset upper limit temperature is 70℃, the formula for calculating the total annual overload duration based on the overload time ratio is as follows:

[0121]

[0122] In the formula, This represents the total overload duration for the entire year, expressed in hours.

[0123] In addition, different overload cycles can be calculated for each month based on actual monthly seabed temperature variation data, and then accumulated to obtain a more realistic total annual overload duration.

[0124] In summary, the cable overload period determination method provided in this embodiment constructs a finite element simulation model corresponding to the submarine cable and executes the following steps according to a preset simulation duration using the finite element simulation model: determining the steady-state initial temperature field of the submarine cable under rated currents with different light load ratios; adjusting the current of the submarine cable to apply rated currents with different overload ratios; after adjusting the current to the rated current for each overload ratio, obtaining the overload duration of the submarine cable rising to multiple preset upper limit temperatures based on any steady-state initial temperature field; and after the temperature of the submarine cable rises to each preset upper limit temperature, adjusting the current of the submarine cable to the steady-state initial temperature field. The rated current corresponding to the light load ratio is used. After adjusting the current to the rated current of the light load ratio, the cooling duration of the submarine cable is obtained based on each preset upper limit temperature to the steady-state initial temperature field. According to the overload duration and cooling duration corresponding to each preset upper limit temperature, the overload cycle corresponding to the submarine cable is determined. By simulating the overload duration of each preset upper limit temperature and the subsequent cooling duration under frequent short-term overload conditions based on the steady-state initial temperature field of the rated current of any light load ratio, the overload cycle corresponding to the submarine cable is determined, making it easy to determine the overload cycle corresponding to the rated current of any light load ratio.

[0125] Furthermore, the cable overload cycle determination method provided in this embodiment determines the bottleneck section operating condition information of the submarine cable; determines the corresponding boundary conditions based on the bottleneck section operating condition information; and determines the steady-state initial temperature field of the submarine cable under rated current with different light load ratios based on the boundary conditions. By replacing uniform environmental parameters with boundary conditions generated in real time, the accuracy of subsequent submarine cable overload cycle determination is increased.

[0126] In addition, the cable overload cycle determination method provided in this embodiment determines the number of overload cycles in a year based on the overload cycle; determines the overload time ratio of the submarine cable based on the overload duration and cooling duration corresponding to each preset upper limit temperature; and determines the cumulative overload duration in a year based on the overload time ratio, so that the overload cycle, overload time ratio, number of overload cycles in a year, and cumulative overload duration in a year can be directly used as quantitative indicators for engineering decisions.

[0127] Figure 4 A flowchart illustrating the cable overload period determination method provided in this application embodiment. Figure 2 In the embodiments of this application, in Figure 2 Based on the provided embodiments, a detailed explanation of the specific implementation method for generating a year-round overload cycle data table for submarine cables is given. For example... Figure 4 As shown, the method includes:

[0128] S401: Determine the overload cycle, overload time percentage, number of overload cycles per year, and total overload duration for each preset upper limit temperature corresponding to each steady-state initial temperature field of the submarine cable.

[0129] In this embodiment, each steady-state initial temperature field is determined based on the rated current with different light load ratios.

[0130] In this embodiment, the discussion of each preset upper limit temperature has been explained in detail in step S204, and will not be repeated here.

[0131] In this embodiment, the calculation formulas for overload cycle, overload time percentage, number of overload cycles per year, and total overload duration per year have been explained in detail in step S207, and will not be repeated here.

[0132] S402: Generate an annual overload cycle data table for submarine cables based on each overload cycle, the percentage of each overload time, the number of overload cycles per year, and the cumulative overload duration per year.

[0133] In summary, the cable overload cycle determination method provided in this embodiment determines the overload cycle, overload time percentage, number of overload cycles per year, and total overload duration for each preset upper limit temperature corresponding to each steady-state initial temperature field of the submarine cable. Based on each overload cycle, overload time percentage, number of overload cycles per year, and total overload duration, an annual overload cycle data table for the submarine cable is generated, allowing users to have a comprehensive and intuitive understanding of the overload situation of the submarine cable, thus enhancing the user experience.

[0134] Figure 5 This is a schematic diagram of the cable overload cycle determination device provided in an embodiment of this application. Figure 5 As shown, the cable overload cycle determination device includes: a construction module 501, a first determination module 502, a first adjustment module 503, a first acquisition module 504, a second adjustment module 505, a second acquisition module 506, and a second determination module 507.

[0135] Module 501 is used to construct the finite element simulation model corresponding to the submarine cable, and to execute the following steps according to the preset simulation duration using the finite element simulation model:

[0136] The first determining module 502 is used to determine the steady-state initial temperature field of the submarine cable under rated current with different light load ratios.

[0137] The first adjustment module 503 is used to adjust the current of the submarine cable to apply rated current with different overload ratios.

[0138] The first acquisition module 504 is used to acquire the overload duration of the submarine cable after adjusting the current to the rated current of each overload ratio, based on any steady-state initial temperature field, and rising to multiple preset upper limit temperatures respectively.

[0139] The second adjustment module 505 is used to adjust the current of the submarine cable to the rated current corresponding to the light load ratio of the steady-state initial temperature field after the temperature of the submarine cable rises to each preset upper limit temperature.

[0140] The second acquisition module 506 is used to acquire the cooling duration of the submarine cable after adjusting the current to the rated current of the light load ratio, based on each preset upper limit temperature, to the steady-state initial temperature field.

[0141] The second determining module 507 is used to determine the overload cycle corresponding to the submarine cable based on the overload duration and cooling duration corresponding to each preset upper limit temperature.

[0142] In one possible implementation, the first determining module 502 specifically includes:

[0143] The first determining unit is used to determine the operating condition information of the bottleneck section of the submarine cable;

[0144] The second determining unit is used to determine the corresponding boundary conditions based on the bottleneck section working condition information.

[0145] The third determining unit is used to determine the steady-state initial temperature field of the submarine cable under rated current with different light load ratios based on the boundary conditions.

[0146] In one possible implementation, module 501 specifically includes:

[0147] The acquisition unit is used to acquire multi-layer structure data of submarine cables and construct a geometric model of the submarine cables based on the multi-layer structure data.

[0148] The configuration unit is used to configure the parameters of each structural data to obtain the corresponding multiple physical parameters;

[0149] The generation unit is used to generate the corresponding finite element simulation model based on multiple physical parameters and geometric models corresponding to each structural data.

[0150] In one possible implementation, the multilayer structure data sequentially includes one or more of the following structural data: conductor data, insulation layer data, metal sheath data, armor layer data, and outer sheath data.

[0151] In one possible implementation, the device further includes:

[0152] The third determining module is used to determine the corresponding insulation layer material based on the insulation layer data;

[0153] The fourth determination module is used to determine the corresponding material aging characteristics based on the insulating layer material;

[0154] The third adjustment module is used to adjust the preset upper limit temperature according to the material aging characteristics and the operating time of the submarine cable to obtain the dynamic upper limit temperature.

[0155] In one possible implementation, the device further includes:

[0156] The fifth determining module is used to determine the number of overload cycles throughout the year based on the overload cycle.

[0157] The sixth determining module is used to determine the overload time percentage of the submarine cable based on the overload duration and cooling duration corresponding to each preset upper limit temperature.

[0158] The seventh module is used to determine the total annual overload duration based on the percentage of overload time.

[0159] In one possible implementation, the device further includes:

[0160] The eighth determination module is used to determine the overload cycle, overload time percentage, number of overload cycles per year, and total overload duration per year for each preset upper limit temperature corresponding to each steady-state initial temperature field of the submarine cable.

[0161] The generation module is used to generate an annual overload cycle data table for submarine cables based on each overload cycle, the percentage of each overload time, the number of overload cycles per year, and the cumulative overload duration per year.

[0162] The apparatus provided in this embodiment can be used to execute the technical solutions of the above method embodiments. Its implementation principle and technical effects are similar, and will not be described again here.

[0163] Figure 6 This is a schematic diagram of the hardware structure of the electronic device provided in an embodiment of this application. Figure 6 As shown, the electronic device of this embodiment includes: a processor 601 and a memory 602; the memory stores computer execution instructions; at least one processor executes the computer execution instructions stored in the memory, causing at least one processor to execute the cable overload cycle determination method as described above.

[0164] Alternatively, the memory 602 can be either standalone or integrated with the processor 601.

[0165] When the memory 602 is set up independently, the electronic device also includes a bus 603 for connecting the memory 602 and the processor 601.

[0166] This application also provides a computer storage medium storing computer execution instructions. When the processor executes the computer execution instructions, the above-mentioned cable overload cycle determination method is implemented.

[0167] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the above-described cable overload cycle determination method.

[0168] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative; for instance, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple modules may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices, or modules, and may be electrical, mechanical, or other forms.

[0169] The modules described as separate components may or may not be physically separate. The components shown as modules may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to implement the solution of this embodiment according to actual needs.

[0170] Furthermore, the functional modules in the various embodiments of this application can be integrated into one processing unit, or each module can exist physically separately, or two or more modules can be integrated into one unit. The unit composed of the above modules can be implemented in hardware or in the form of hardware plus software functional units.

[0171] The integrated modules described above, implemented as software functional modules, can be stored in a computer-readable storage medium. These software functional modules, stored in a storage medium, include several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute some steps of the methods of the various embodiments of this application.

[0172] It should be understood that the aforementioned processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), etc. A general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in this invention can be directly manifested as execution by a hardware processor, or execution by a combination of hardware and software modules within the processor.

[0173] The memory may include high-speed RAM, and may also include non-volatile storage (NVM), such as at least one disk storage device, and may also be a USB flash drive, external hard drive, read-only memory, disk or optical disc, etc.

[0174] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of illustration, the buses shown in the accompanying drawings are not limited to a single bus or a single type of bus.

[0175] The aforementioned storage media can be implemented from any type of volatile or non-volatile storage device or a combination thereof, such as Static Random-Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The storage media can be any available medium accessible to general-purpose or special-purpose computers.

[0176] An exemplary storage medium is coupled to a processor, enabling the processor to read information from and write information to the storage medium. Alternatively, the storage medium can be an integral part of the processor. Both the processor and the storage medium can reside in an Application Specific Integrated Circuit (ASIC). Alternatively, the processor and storage medium can exist as discrete components in an electronic device or host device.

[0177] Those skilled in the art will understand that all or part of the steps of the above-described method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments; and the aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0178] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A method for determining the overload period of a cable, characterized in that, Applied to electronic devices, including: Construct a finite element simulation model for the submarine cable, and then execute the following steps using the finite element simulation model according to a preset simulation duration: Determine the steady-state initial temperature field of the submarine cable under rated current with different light load ratios; The current of the submarine cable is adjusted to apply rated current with different overload ratios; After adjusting the current to the rated current for each overload ratio, the overload duration of the submarine cable, based on any steady-state initial temperature field, is obtained for each of the multiple preset upper limit temperatures. After the temperature of the submarine cable rises to each preset upper limit temperature, the current of the submarine cable is adjusted to the rated current corresponding to the light load ratio of the steady-state initial temperature field. After adjusting the current to the rated current of the light load ratio, the submarine cable is obtained, and the cooling duration is reduced to the steady-state initial temperature field based on each preset upper limit temperature. The overload cycle corresponding to the submarine cable is determined based on the overload duration and cooling duration corresponding to each preset upper limit temperature.

2. The method according to claim 1, characterized in that, Determining the steady-state initial temperature field of the submarine cable under rated currents with different light load ratios includes: Determine the operating condition information of the bottleneck section of the submarine cable; Determine the corresponding boundary conditions based on the bottleneck section operating condition information. Based on the boundary conditions, the steady-state initial temperature field of the submarine cable under rated current with different light load ratios is determined.

3. The method according to claim 1, characterized in that, The finite element simulation model for constructing the submarine cable includes: Obtain the multi-layer structure data of the submarine cable, and construct the geometric model of the submarine cable based on the multi-layer structure data; Configure parameters for each structural data to obtain multiple corresponding physical parameters; A corresponding finite element simulation model is generated based on multiple physical parameters corresponding to each structural data and the geometric model.

4. The method according to claim 3, characterized in that, The multi-layer structure data includes one or more of the following structure data in sequence: Conductor data, insulation layer data, metal sheath data, armor layer data, and outer sheath data.

5. The method according to claim 4, characterized in that, Also includes: The corresponding insulation layer material is determined based on the insulation layer data; Determine the corresponding material aging characteristics based on the insulating layer material; Based on the aging characteristics of the material and the operating time of the submarine cable, the preset upper limit temperature is adjusted to obtain the dynamic upper limit temperature.

6. The method according to any one of claims 1-5, characterized in that, After determining the overload cycle corresponding to the submarine cable based on the overload duration and cooling duration corresponding to each preset upper limit temperature, the method further includes: The number of overload cycles per year is determined based on the overload cycle. The overload time percentage of the submarine cable is determined based on the overload duration and cooling duration corresponding to each preset upper limit temperature. The total overload duration for the year is determined based on the percentage of overload time.

7. The method according to claim 6, characterized in that, Also includes: Determine the overload cycle, overload time percentage, number of overload cycles per year, and total overload duration for each preset upper limit temperature corresponding to each steady-state initial temperature field of the submarine cable. The annual overload cycle data table for the submarine cable is generated based on each overload cycle, the percentage of each overload time, the number of overload cycles per year, and the cumulative overload duration per year.

8. A cable overload cycle determination device, characterized in that, Applied to electronic devices, including: The construction module is used to build a finite element simulation model corresponding to the submarine cable, and then, using the finite element simulation model, executes the following steps according to a preset simulation duration: The first determining module is used to determine the steady-state initial temperature field of the submarine cable under rated current with different light load ratios. The first adjustment module is used to adjust the current of the submarine cable to apply rated current with different overload ratios. The first acquisition module is used to acquire the overload duration of the submarine cable after adjusting the current to the rated current of each overload ratio, based on any steady-state initial temperature field, and the overload duration of the cable rising to multiple preset upper limit temperatures. The second adjustment module is used to adjust the current of the submarine cable to the rated current corresponding to the light load ratio of the steady-state initial temperature field after the temperature of the submarine cable rises to each preset upper limit temperature. The second acquisition module is used to acquire the submarine cable after adjusting the current to the rated current of the light load ratio, and to acquire the cooling duration of the cable to the steady-state initial temperature field based on each preset upper limit temperature. The second determining module is used to determine the overload cycle corresponding to the submarine cable based on the overload duration and cooling duration corresponding to each preset upper limit temperature.

9. An electronic device, characterized in that, include: At least one processor and memory; The memory stores computer-executed instructions; The at least one processor executes computer execution instructions stored in the memory, causing the at least one processor to perform the cable overload cycle determination method as described in any one of claims 1 to 7.

10. A computer storage medium, characterized in that, The computer storage medium stores computer execution instructions, and when the processor executes the computer execution instructions, it implements the cable overload cycle determination method as described in any one of claims 1 to 7.

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