Conductor temperature determination method and device, equipment and storage medium

Abstract

The invention discloses a conductor temperature determination method and device, equipment and a storage medium, and the method comprises the steps: obtaining a temperature calculation model which is used for describing the burying depth of a submarine cable, the load current of the submarine cable, the seawater temperature, and the relation between the conductor temperature of the submarine cable, the temperature calculation model is constructed in advance based on a first model and a second model, the first model is used for describing a relationship among a load current, a seawater temperature and a conductor temperature of the submarine cable under a fixed burying depth, and the second model is used for describing a relationship between different burying depths of the submarine cable and the first model; inputting the burying depth of the to-be-calculated submarine cable, the load current of the to-be-calculated submarine cable and the seawater temperature into a temperature calculation model to obtain the conductor temperature of the to-be-calculated submarine cable; and outputting the to-be-calculated conductor temperature of the submarine cable. Therefore, the influence of the three factors on the submarine cable conductor temperature can be considered, and the conductor temperature of the submarine cable can be efficiently and accurately calculated.

Description

Technical Field

[0001] The present application relates to the field of simulation technology, and in particular to a method, device, equipment and storage medium for determining the temperature of a conductor. Background Art

[0002] Submarine cables are the core power equipment for submarine power transmission and transformation projects. Submarine cables play an important role in ensuring the interconnection of power between islands and between islands and the mainland. During the long-term operation of submarine cables, the conductor temperature of submarine cables affects the transmission capacity of submarine cables. Specifically, as the conductor temperature increases, the current carrying capacity of submarine cables will be limited, resulting in a decrease in the transmission capacity of submarine cables.

[0003] Based on this, the detection of the conductor temperature of submarine cables is of great significance. In practical applications, since the conductor temperature of cables cannot be directly measured, most studies focus on how to measure the conductor temperature of submarine cables. However, the measurement methods provided by these studies are relatively rough. Because submarine cables are buried on the seabed, there are many factors that affect the conductor temperature, which makes it difficult to obtain accurate conductor temperature of submarine cables. Summary of the invention

[0004] The embodiments of the present application provide a method, device, equipment and storage medium for determining the conductor temperature, so as to obtain the accurate conductor temperature of a submarine cable.

[0005] In a first aspect, an embodiment of the present application provides a method for determining a conductor temperature, characterized by comprising:

[0006] Acquire a temperature calculation model, the temperature calculation model is used to describe the relationship between the burial depth of the submarine cable, the load current of the submarine cable, the seawater temperature, and the conductor temperature of the submarine cable, the temperature calculation model is pre-constructed based on a first model and a second model, the first model is used to describe the relationship between the load current of the submarine cable at a fixed burial depth, the seawater temperature, and the conductor temperature of the submarine cable, and the second model is used to describe the relationship between different burial depths of the submarine cable and the first model;

[0007] Inputting the buried depth of the submarine cable to be calculated, the load current of the submarine cable to be calculated and the seawater temperature into the temperature calculation model to obtain the conductor temperature of the submarine cable to be calculated;

[0008] The conductor temperature of the submarine cable to be calculated is output.

[0009] Optionally, the first model is constructed by the following steps:

[0010] Constructing the first model based on a first preset relationship between the submarine cable loss at the fixed burial depth and the conductor temperature of the submarine cable, and a second preset relationship between the seawater temperature at the fixed burial depth and the conductor temperature of the submarine cable;

[0011] Among them, the first preset relationship is used to indicate that the loss of the submarine cable at the fixed burial depth is positively correlated with the conductor temperature of the submarine cable, and the loss of the submarine cable is related to the square value of the load current; the second preset relationship is used to indicate that the seawater temperature of the submarine cable at the fixed burial depth and the conductor temperature of the submarine cable grow exponentially.

[0012] Optionally, the second model is constructed by the following steps:

[0013] In a simulation environment coupled with multiple physical fields, a simulation result of the conductor temperature of the submarine cable at the fixed burial depth, different load currents and different seawater temperatures is calculated;

[0014] Based on the different burial depths, the different load currents, the different seawater temperatures and the simulation results, the model coefficients to be solved in the first model are solved to obtain the second model, which is used to describe the relationship between the different burial depths and the model coefficients to be solved.

[0015] Optionally, the calculating of simulation results of the conductor temperature of the submarine cable at the fixed burial depth, different load currents and different seawater temperatures in a simulation environment coupled with multiple physical fields includes:

[0016] In the simulation environment, the steady-state current carrying capacity of the submarine cable is determined by a finite element analysis method, where the steady-state current carrying capacity is the rated load current when the conductor temperature of the submarine cable is a preset temperature;

[0017] Based on the steady-state current carrying capacity, determining the load current of the submarine cable at the fixed burial depth at different load rates, wherein the load rate is a ratio of the load current of the submarine cable to the current carrying capacity;

[0018] The simulation result is calculated based on the different seawater temperatures and the load current of the submarine cable at different load rates.

[0019] Optionally, the simulation environment for coupling the multiple physical fields is constructed based on the magnetothermal coupling equation and the soil-seawater convection heat transfer equation, and the multiple physical fields include a magnetic field, a temperature field and a flow field.

[0020] Optionally, the temperature calculation model is constructed by the following steps:

[0021] The model coefficients to be solved in the first model are assigned values ​​based on the second model to obtain the temperature calculation model.

[0022] In a second aspect, an embodiment of the present application provides a device for determining a conductor temperature, characterized in that it includes:

[0023] A model acquisition module, used to acquire a temperature calculation model, wherein the temperature calculation model is used to describe the relationship between the burial depth of the submarine cable, the load current of the submarine cable, the seawater temperature, and the conductor temperature of the submarine cable, wherein the temperature calculation model is pre-constructed based on a first model and a second model, wherein the first model is used to describe the relationship between the load current of the submarine cable at a fixed burial depth, the seawater temperature, and the conductor temperature of the submarine cable, and the second model is used to describe the relationship between different burial depths of the submarine cable and the first model;

[0024] A temperature determination module, used for inputting the buried depth of the submarine cable to be calculated, the load current of the submarine cable to be calculated and the seawater temperature into the temperature calculation model to obtain the conductor temperature of the submarine cable to be calculated;

[0025] The temperature output module is used to output the conductor temperature of the submarine cable to be calculated.

[0026] Optionally, the first model is constructed by the following modules:

[0027] A first model building module, configured to build the first model based on a first preset relationship between the submarine cable loss at the fixed burial depth and the conductor temperature of the submarine cable, and a second preset relationship between the seawater temperature at the fixed burial depth and the conductor temperature of the submarine cable;

[0028] Among them, the first preset relationship is used to indicate that the loss of the submarine cable at the fixed burial depth is positively correlated with the conductor temperature of the submarine cable, and the loss of the submarine cable is related to the square value of the load current; the second preset relationship is used to indicate that the seawater temperature of the submarine cable at the fixed burial depth and the conductor temperature of the submarine cable grow exponentially.

[0029] In a third aspect, an embodiment of the present application provides an electronic device, the device comprising: a processor, a memory, and a system bus;

[0030] The processor and the memory are connected via the system bus;

[0031] The memory is used to store a program, wherein the program includes instructions, and when the instructions are executed by the processor, the processor executes any implementation step of the method for determining the conductor temperature.

[0032] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores instructions, and when the instructions are executed on an electronic device, the electronic device executes any implementation step of the above-mentioned method for determining the conductor temperature.

[0033] It can be seen from the above technical solutions that the embodiments of the present application have the following advantages:

[0034] In the embodiment of the present application, a temperature calculation model can be obtained first. Since the temperature calculation model is used to describe the relationship between the buried depth of the submarine cable, the load current of the submarine cable, the seawater temperature, and the conductor temperature of the submarine cable, the buried depth of the submarine cable to be calculated, the load current of the submarine cable to be calculated, and the seawater temperature are input into the temperature calculation model to obtain the conductor temperature of the submarine cable to be calculated, and then the conductor temperature of the submarine cable to be calculated is output. Among them, the temperature calculation model is pre-constructed based on the first model and the second model. Specifically, the first model is used to describe the relationship between the load current, the seawater temperature, and the conductor temperature of the submarine cable at a fixed buried depth by controlling the variable of the buried depth, and then different buried depths are introduced to establish a second model to describe the relationship between different buried depths and the above-mentioned first model, so as to accurately construct the relationship between the three parameters of load current, seawater temperature and buried depth and the conductor temperature of the submarine cable. In this way, the influence of the above three factors on the conductor temperature of the submarine cable can be taken into account, which helps to efficiently and accurately calculate the conductor temperature of the submarine cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1a A flow chart of a method for determining a conductor temperature provided in an embodiment of the present application;

[0036] Figure 1b A flow chart of another method for determining the temperature of a conductor provided in an embodiment of the present application;

[0037] Figure 2 A schematic diagram of a simulation calculation of the conductor temperature of a submarine cable provided in an embodiment of the present application;

[0038] Figure 3 A schematic diagram of another simulation calculation of the conductor temperature of a submarine cable provided in an embodiment of the present application;

[0039] Figure 4 A schematic diagram of the structure of a device for determining the temperature of a conductor provided in an embodiment of the present application. DETAILED DESCRIPTION

[0040] As mentioned above, in practical applications, since the conductor temperature of the cable cannot be directly measured, most studies focus on how to measure the conductor temperature of the submarine cable. Specifically, the optical fiber temperature measurement technology can be used to measure the outer skin temperature of the cable conductor, and the conductor temperature can be indirectly inferred based on the submarine cable thermal circuit model. Alternatively, the conductor temperature under different load currents can be simulated and calculated, and the relationship between the conductor temperature and the load current can be established. However, because the submarine cable is buried on the seabed and there are many factors affecting the conductor temperature, the above measurement method does not take into account the influence of environmental factors such as the submarine cable burial depth and seawater temperature on the conductor temperature of the submarine cable. Therefore, the measurement methods provided by these research institutes are relatively rough, which makes it difficult to obtain accurate conductor temperatures of the submarine cable.

[0041] Based on this, in order to solve the above problems, the embodiment of the present application provides a method for determining the conductor temperature, which may include: first obtaining a temperature calculation model. Since the temperature calculation model is used to describe the relationship between the buried depth of the submarine cable, the load current of the submarine cable, the seawater temperature, and the conductor temperature of the submarine cable, the buried depth of the submarine cable to be calculated, the load current of the submarine cable to be calculated, and the seawater temperature are input into the temperature calculation model to obtain the conductor temperature of the submarine cable to be calculated, and then the conductor temperature of the submarine cable to be calculated is output. Among them, the temperature calculation model is pre-constructed based on the first model and the second model. Specifically, the first model is used to describe the relationship between the load current, the seawater temperature, and the conductor temperature of the submarine cable at a fixed buried depth by controlling the variable of the buried depth, and then different buried depths are introduced to establish a second model to describe the relationship between different buried depths and the above first model, so as to accurately construct the relationship between the three parameters of load current, seawater temperature and buried depth and the conductor temperature of the submarine cable. In this way, the influence of the above three factors on the conductor temperature of the submarine cable can be taken into account, which helps to efficiently and accurately calculate the conductor temperature of the submarine cable.

[0042] It should be noted that the embodiment of the present application may not limit the execution subject of the conductor temperature determination method. For example, the conductor temperature determination method of the embodiment of the present application may be applied to data processing devices such as terminal devices or servers. The terminal device may be an electronic device such as a smart phone, a computer, a personal digital assistant (PDA), a tablet computer, etc. The server may be an independent server, a cluster server, or a cloud server.

[0043] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0044] Figure 1a A flow chart of a method for determining the temperature of a conductor provided in an embodiment of the present application, Figure 1b A flowchart of another method for determining the conductor temperature provided in an embodiment of the present application. Figure 1a As shown, the method for determining the conductor temperature provided in the embodiment of the present application may include:

[0045] S101: Obtain a temperature calculation model.

[0046] The temperature calculation model is used to describe the relationship between the buried depth of the submarine cable, the load current of the submarine cable, the seawater temperature, and the conductor temperature of the submarine cable. Specifically, the temperature calculation model is pre-constructed based on the first model and the second model. Based on this, the construction process of the first model and the second model is first exemplified below.

[0047] With respect to the first model, the first model is used to describe the relationship between the load current of the submarine cable at a fixed burial depth, the seawater temperature, and the conductor temperature of the submarine cable.

[0048] As a possible implementation, in the process of constructing the first model, the first model is constructed based on a first preset relationship between the submarine cable loss at a fixed burial depth and the conductor temperature of the submarine cable, and a second preset relationship between the seawater temperature at a fixed burial depth and the conductor temperature of the submarine cable.

[0049] Among them, the first preset relationship is used to indicate that the loss of the submarine cable at a fixed burial depth is positively correlated with the conductor temperature of the submarine cable, and the loss of the submarine cable is related to the square value of the load current. The second preset relationship is used to indicate that the seawater temperature of the submarine cable at a fixed burial depth and the conductor temperature of the submarine cable grow exponentially.

[0050] In practical applications, combined with Figure 1bAs shown, the first step is to establish a quantitative mathematical model of the conductor temperature of the ultra-high voltage submarine cable under the combined effect of the load current and the seawater temperature, that is, the first model mentioned above. The ultra-high voltage cable is the above-mentioned submarine cable. In practical applications, a 500kV copper core cross-linked polyethylene submarine cable with a model of HYJQ71-F 290 / 500 1x1800+2x16 (14D+2A) can be used. In addition, since the submarine cable loss is positively correlated with the conductor temperature, the submarine cable loss is related to the square value of the load current, and the seawater temperature and the conductor temperature have an exponential growth relationship, the first model can be specifically shown as the following formula (1):

[0051]

[0052] in, is the conductor temperature of the submarine cable, T w is the seawater temperature, I is the load current, A h , B h and C h is the model coefficient.

[0053] In addition, it should be noted that the above-mentioned submarine cable loss is not only related to the square value of the load current, but also related to the resistance of the submarine cable. However, in practical applications, the resistance of the submarine cable is usually a constant, so the influence of resistance on the submarine cable loss is not considered here.

[0054] Further, as another possible implementation, in the process of constructing the second model, first, the simulation results of the conductor temperature of the submarine cable at a fixed burial depth, different load currents and different seawater temperatures can be calculated in a simulation environment coupled with multiple physical fields. For ease of understanding, the construction process of the simulation environment coupled with multiple physical fields is first introduced below.

[0055] Regarding the construction process of the simulation environment for coupling multiple physical fields, in the specific implementation, a 500kV copper core cross-linked polyethylene submarine cable with model HYJQ71-F 290 / 500 1x1800+2x16 (14D+2A) can be used as the research object. Based on this, a simulation environment for coupling multiple physical fields can be constructed based on the magnetothermal coupling equation and the soil-seawater convection heat transfer equation. The above-mentioned multiple physical fields include magnetic field, temperature field and flow field. For ease of understanding, the above-mentioned magnetothermal coupling equation is introduced in combination with formula (2), and the soil-seawater convection heat transfer equation is introduced in combination with formula (3).

[0056]

[0057] Where ρ is the density of the material, C v is the specific heat capacity of the material at normal pressure, K is the thermal conductivity of the material, T is the material temperature, Qe is the total electromagnetic loss, Q rh is the resistance loss, Q ml is the hysteresis loss, Re represents the real part of the complex number, J is the current density, E * is the conjugate complex number of the electric field intensity E, j is the imaginary unit, ω is the angular frequency, B is the magnetic induction intensity, HH * is the magnetic field strength H * The complex conjugate of .

[0058]

[0059] in, is the second-order partial derivative of the material temperature T along the x direction, that is, the curvature of the material temperature T along the x direction, is the second-order partial derivative of the material temperature T along the y direction, that is, the curvature of the material temperature T along the y direction, K is the thermal conductivity of the material, is the derivative of the material temperature T along the normal direction of the boundary, that is, the temperature gradient, α is the convection heat transfer coefficient, T f is the sea water temperature.

[0060] After constructing the magnetic-thermal-fluid multi-physics field through the above formulas (2) and (3), the seawater temperature can be set to 11°C to 26°C and the load current can be set to 700A to 2100A. In this way, in this simulation environment, the steady-state current carrying capacity of the submarine cable can be determined by the finite element analysis method. Among them, the steady-state current carrying capacity can be expressed as the rated load current when the conductor temperature of the submarine cable is a preset temperature. In practical applications, the rated load current when the conductor temperature is constant at 90°C can be determined by the finite element analysis method as the steady-state current carrying capacity of the submarine cable.

[0061] Then, based on the steady-state current carrying capacity, the load current of the submarine cable at different load rates at a fixed burial depth can be determined. The load rate is the ratio of the load current of the submarine cable to the steady-state current carrying capacity. In this way, by adjusting different load rates, the load currents of the submarine cable corresponding to the current carrying capacity at a fixed burial depth can be obtained.

[0062] Furthermore, in the above simulation environment, the finite element analysis method can be used to calculate the simulation results, that is, the conductor temperature of the submarine cable, based on different seawater temperatures and the load current of the submarine cable at different load rates. In practical applications, taking a fixed burial depth of 0.7m as an example, when the seawater temperature is 20°C and the load current is 1274A, the conductor temperature of the submarine cable can be as follows: Figure 2 shown.

[0063] Furthermore, in the process of constructing the second model, in combination with the above formula (3), the model coefficients to be solved in the first model may include A h , B hand C h .

[0064] Correspondingly, the model coefficients to be solved in the first model can be further solved based on different burial depths, different load currents, different seawater temperatures and simulation results to obtain a second model. In this way, the second model is used to describe the relationship between different burial depths and the model coefficients to be solved.

[0065] For example, according to the first model, the burial depth is 0.7m. When the seawater temperature is 14°C, 20°C and 26°C, and the corresponding load current is 1319A, 1274A and 1228A respectively, after the conductor temperature of the submarine cable under the corresponding conditions is calculated by simulation, the seawater temperature, load current and conductor temperature can be substituted into the first model to obtain the model coefficient A to be solved under the condition of burial depth of 0.7m. h is 0.09484, B h is 3.969×10 -5 , C h It is -4.806.

[0066] Correspondingly, the seawater temperatures are set to 11°C, 14°C, 17°C, 20°C, 23°C, 26°C and 29°C, and the buried depths of the submarine cables are 0.7m, 1.2m, 1.5m and 2m, respectively. Finite element simulation analysis is performed based on the magnetic-thermal-fluid multi-physics field to calculate the current carrying capacity of the submarine cable and obtain the load current corresponding to the seawater temperature and burial depth. Then, the conductor temperature of the submarine cable at the corresponding burial depth can be calculated. In practical applications, taking a fixed burial depth of 1.5m as an example, when the seawater temperature is 20°C and the load current is 1274A, the conductor temperature of the submarine cable can be as follows: Figure 3 shown.

[0067] Furthermore, combined with Figure 1b As shown, in the second step, the model coefficients A can be established respectively h , B h and C h The relationship between A and the burial depth is obtained to obtain the second model. h and C h It is linearly related to the burial depth, B h It has an exponential growth relationship with the burial depth, which can be specifically shown as the following formula (4):

[0068]

[0069] In this way, the second model can be substituted into the first model, that is, the model coefficients to be solved in the first model are assigned values ​​based on the second model to obtain the temperature calculation model. Figure 1bAs shown, in the third step, the above model coefficient A can be h , B h and C h The relationship between the load current, seawater temperature, burial depth and temperature of the ultra-high voltage submarine cable conductor is established by substituting the second model into the first model to assign values ​​to the model coefficients to be solved in the first model, thereby establishing a quantitative mathematical model of load current, seawater temperature, burial depth and temperature of the ultra-high voltage submarine cable conductor, i.e., a temperature calculable model. Accordingly, the temperature calculation formula can be specifically shown as the following formula (5):

[0070]

[0071] in, is the conductor temperature of the submarine cable, T w is the seawater temperature, I is the load current, A h , B h and C h is the model coefficient.

[0072] Furthermore, in order to verify the accuracy of the above temperature calculation model, in the embodiment of the present application, the model calculation data and the simulation data can also be subjected to error analysis. Specifically, the above-mentioned HYJQ71-F 290 / 5001x1800+2x16 (14D+2A) 500kV copper core cross-linked polyethylene submarine cable is used as the research object. When the buried depth of the ultra-high voltage submarine cable in the on-site direct buried section is 0.7m, if the seawater temperature is 23℃ in summer and 14℃ in winter, the current carrying capacity of the submarine cable during stable operation is I a , the load current is 60% I a and 80%I a , then the seawater temperature, burial depth and load current of the above two seasons are substituted into the temperature calculation model, that is, the above formula (5), and the conductor temperature of the submarine cable under different load current conditions in summer and winter can be obtained respectively.

[0073] Furthermore, by comparing the calculation results with the simulation results obtained by the multi-physics field finite element simulation, the accuracy of the temperature calculation model can be determined. For ease of understanding, the following table is used for explanation. Table 1 is a comparison of the conductor temperature simulation results in summer and the model calculation results, and Table 2 is a comparison of the conductor temperature simulation results in winter and the model calculation results.

[0074] Table 1

[0075]

[0076] Table 2

[0077]

[0078] Combining Tables 1 and 2 above, the error between the conductor simulation results and the model calculation results of the submarine cable in summer and winter does not exceed 5%, so the above temperature calculation model has high accuracy.

[0079] S102: Inputting the buried depth of the submarine cable to be calculated, the load current of the submarine cable to be calculated, and the seawater temperature into a temperature calculation model to obtain the conductor temperature of the submarine cable to be calculated.

[0080] Combination Figure 1b As shown, in the fourth step, the conductor temperature of the submarine cable to be calculated can be calculated with the help of the quantitative calculation model of load current, seawater temperature, burial depth and conductor temperature of the ultra-high voltage submarine cable established above, that is, the temperature calculation model.

[0081] Specifically, when it is actually necessary to calculate the conductor temperature of the submarine cable, first, the buried depth of the submarine cable to be calculated, the load current of the submarine cable to be calculated, and the seawater temperature are obtained. Then, the buried depth of the submarine cable to be calculated, the load current of the submarine cable to be calculated, and the seawater temperature can be input into the temperature calculation model, that is, input into the above formula (5), and the conductor temperature of the submarine cable to be calculated output by the temperature calculation model can be obtained.

[0082] S103: Output the conductor temperature of the submarine cable to be calculated.

[0083] Based on the relevant contents of the above steps S101 to S103, it can be known that in the embodiment of the present application, a temperature calculation model can be obtained first. Since the temperature calculation model is used to describe the relationship between the buried depth of the submarine cable, the load current of the submarine cable, the seawater temperature, and the conductor temperature of the submarine cable, the buried depth of the submarine cable to be calculated, the load current of the submarine cable to be calculated, and the seawater temperature are input into the temperature calculation model to obtain the conductor temperature of the submarine cable to be calculated, and then the conductor temperature of the submarine cable to be calculated is output. Among them, the temperature calculation model is pre-constructed based on the first model and the second model. Specifically, the first model is used to describe the relationship between the load current, the seawater temperature, and the conductor temperature of the submarine cable at a fixed buried depth by controlling the variable of the buried depth, and then different buried depths are introduced to establish a second model to describe the relationship between different buried depths and the above first model, so as to accurately construct the relationship between the three parameters of load current, seawater temperature and buried depth and the conductor temperature of the submarine cable. In this way, the influence of the above three factors on the conductor temperature of the submarine cable can be taken into account, which helps to efficiently and accurately calculate the conductor temperature of the submarine cable.

[0084] Further, based on the method for determining the conductor temperature provided in the above embodiment, the embodiment of the present application may also provide a device for determining the conductor temperature. The device for determining the conductor temperature is described below in conjunction with the embodiments and drawings.

[0085] Figure 4 A schematic diagram of a device for determining the temperature of a conductor provided in an embodiment of the present application. Figure 4 As shown, the conductor temperature determination device 400 provided in the embodiment of the present application may include:

[0086] A model acquisition module 401 is used to acquire a temperature calculation model, wherein the temperature calculation model is used to describe the relationship between the burial depth of the submarine cable, the load current of the submarine cable, the seawater temperature, and the conductor temperature of the submarine cable, wherein the temperature calculation model is pre-constructed based on a first model and a second model, wherein the first model is used to describe the relationship between the load current of the submarine cable at a fixed burial depth, the seawater temperature, and the conductor temperature of the submarine cable, and the second model is used to describe the relationship between different burial depths of the submarine cable and the first model;

[0087] The temperature determination module 402 is used to input the buried depth of the submarine cable to be calculated, the load current of the submarine cable to be calculated and the seawater temperature into the temperature calculation model to obtain the conductor temperature of the submarine cable to be calculated;

[0088] The temperature output module 403 is used to output the conductor temperature of the submarine cable to be calculated.

[0089] Optionally, the first model is constructed by the following modules:

[0090] A first model building module, configured to build the first model based on a first preset relationship between the submarine cable loss at the fixed burial depth and the conductor temperature of the submarine cable, and a second preset relationship between the seawater temperature at the fixed burial depth and the conductor temperature of the submarine cable;

[0091] Among them, the first preset relationship is used to indicate that the loss of the submarine cable at the fixed burial depth is positively correlated with the conductor temperature of the submarine cable, and the loss of the submarine cable is related to the square value of the load current; the second preset relationship is used to indicate that the seawater temperature of the submarine cable at the fixed burial depth and the conductor temperature of the submarine cable grow exponentially.

[0092] Optionally, the second model is constructed by the following modules:

[0093] A simulation calculation module, used for calculating the simulation results of the conductor temperature of the submarine cable at the fixed burial depth, different load currents and different seawater temperatures in a simulation environment coupled with multiple physical fields;

[0094] The second model building module is used to solve the model coefficients to be solved in the first model based on the different burial depths, the different load currents, the different seawater temperatures and the simulation results, so as to obtain the second model, wherein the second model is used to describe the relationship between the different burial depths and the model coefficients to be solved.

[0095] Optionally, the simulation calculation module is specifically used to:

[0096] In the simulation environment, the steady-state current carrying capacity of the submarine cable is determined by a finite element analysis method, where the steady-state current carrying capacity is the rated load current when the conductor temperature of the submarine cable is a preset temperature;

[0097] Based on the steady-state current carrying capacity, determining the load current of the submarine cable at the fixed burial depth at different load rates, wherein the load rate is a ratio of the load current of the submarine cable to the steady-state current carrying capacity;

[0098] The simulation result is calculated based on the different seawater temperatures and the load current of the submarine cable at different load rates.

[0099] Optionally, a simulation environment for coupling multiple physical fields is constructed based on a magnetothermal coupling equation and a soil-seawater convection heat transfer equation, wherein the multiple physical fields include a magnetic field, a temperature field, and a flow field.

[0100] Optionally, the temperature calculation model is constructed by the following modules:

[0101] An assignment module is used to assign values ​​to the model coefficients to be solved in the first model based on the second model to obtain the temperature calculation model.

[0102] Furthermore, an embodiment of the present application also provides an electronic device, comprising: a processor, a memory, and a system bus;

[0103] The processor and the memory are connected via the system bus;

[0104] The memory is used to store one or more programs, and the one or more programs include instructions. When the instructions are executed by the processor, the processor executes any implementation step of the above-mentioned method for determining the conductor temperature.

[0105] Furthermore, an embodiment of the present application also provides a computer-readable storage medium, in which instructions are stored. When the instructions are executed on an electronic device, any step of the above-mentioned method for determining the conductor temperature is implemented.

[0106] It can be known from the description of the above implementation mode that those skilled in the art can clearly understand that all or part of the steps in the above-mentioned embodiment method can be implemented by means of software plus the necessary general hardware platform. Based on such an understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product can be stored in a storage medium, such as ROM / RAM, a disk, an optical disk, etc., and includes a number of instructions for a computer device (which can be a personal computer, a server, or a network communication device such as a media gateway, etc.) to execute the methods described in each embodiment of the present application or certain parts of the embodiments. It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referred to each other.

[0107] As for the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method part.

[0108] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0109] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for determining the temperature of a conductor, characterized in that: include: Acquire a temperature calculation model, the temperature calculation model is used to describe the relationship between the burial depth of the submarine cable, the load current of the submarine cable, the seawater temperature, and the conductor temperature of the submarine cable, the temperature calculation model is pre-constructed based on a first model and a second model, the first model is used to describe the relationship between the load current of the submarine cable at a fixed burial depth, the seawater temperature, and the conductor temperature of the submarine cable, and the second model is used to describe the relationship between different burial depths of the submarine cable and the first model; Inputting the buried depth of the submarine cable to be calculated, the load current of the submarine cable to be calculated and the seawater temperature into the temperature calculation model to obtain the conductor temperature of the submarine cable to be calculated; The conductor temperature of the submarine cable to be calculated is output.

2. The method for determining the conductor temperature according to claim 1, characterized in that: The first model is constructed by the following steps: Constructing the first model based on a first preset relationship between the submarine cable loss at the fixed burial depth and the conductor temperature of the submarine cable, and a second preset relationship between the seawater temperature at the fixed burial depth and the conductor temperature of the submarine cable; Among them, the first preset relationship is used to indicate that the loss of the submarine cable at the fixed burial depth is positively correlated with the conductor temperature of the submarine cable, and the loss of the submarine cable is related to the square value of the load current; the second preset relationship is used to indicate that the seawater temperature of the submarine cable at the fixed burial depth and the conductor temperature of the submarine cable grow exponentially.

3. The method for determining the conductor temperature according to claim 2, characterized in that: The second model is constructed by the following steps: In a simulation environment coupled with multiple physical fields, a simulation result of the conductor temperature of the submarine cable at the fixed burial depth, different load currents and different seawater temperatures is calculated; Based on the different burial depths, the different load currents, the different seawater temperatures and the simulation results, the model coefficients to be solved in the first model are solved to obtain the second model, which is used to describe the relationship between the different burial depths and the model coefficients to be solved.

4. The method for determining the conductor temperature according to claim 3, characterized in that: The simulation results of the conductor temperature of the submarine cable at the fixed burial depth, different load currents and different seawater temperatures are calculated in the simulation environment of multiple physical field coupling, including: In the simulation environment, the steady-state current carrying capacity of the submarine cable is determined by a finite element analysis method, wherein the steady-state current carrying capacity is the rated load current when the conductor temperature of the submarine cable is a preset temperature; Based on the steady-state current carrying capacity, determining the load current of the submarine cable at the fixed burial depth at different load rates, wherein the load rate is a ratio of the load current of the submarine cable to the steady-state current carrying capacity; The simulation result is calculated based on the different seawater temperatures and the load current of the submarine cable at different load rates.

5. The method for determining the conductor temperature according to claim 3, characterized in that: The simulation environment for coupling multiple physical fields is constructed based on the magnetothermal coupling equation and the soil-seawater convection heat transfer equation, and the multiple physical fields include a magnetic field, a temperature field and a flow field.

6. The method for determining the conductor temperature according to claim 3, characterized in that: The temperature calculation model is constructed by the following steps: The model coefficients to be solved in the first model are assigned values ​​based on the second model to obtain the temperature calculation model.

7. A device for determining conductor temperature, characterized in that: include: A model acquisition module, used to acquire a temperature calculation model, wherein the temperature calculation model is used to describe the relationship between the burial depth of the submarine cable, the load current of the submarine cable, the seawater temperature, and the conductor temperature of the submarine cable, wherein the temperature calculation model is pre-constructed based on a first model and a second model, wherein the first model is used to describe the relationship between the load current of the submarine cable at a fixed burial depth, the seawater temperature, and the conductor temperature of the submarine cable, and the second model is used to describe the relationship between different burial depths of the submarine cable and the first model; A temperature determination module, used for inputting the buried depth of the submarine cable to be calculated, the load current of the submarine cable to be calculated and the seawater temperature into the temperature calculation model to obtain the conductor temperature of the submarine cable to be calculated; The temperature output module is used to output the conductor temperature of the submarine cable to be calculated.

8. The device for determining the conductor temperature according to claim 7, characterized in that: The first model is constructed by the following modules: A first model building module, configured to build the first model based on a first preset relationship between the submarine cable loss at the fixed burial depth and the conductor temperature of the submarine cable, and a second preset relationship between the seawater temperature at the fixed burial depth and the conductor temperature of the submarine cable; Among them, the first preset relationship is used to indicate that the loss of the submarine cable at the fixed burial depth is positively correlated with the conductor temperature of the submarine cable, and the loss of the submarine cable is related to the square value of the load current; the second preset relationship is used to indicate that the seawater temperature of the submarine cable at the fixed burial depth and the conductor temperature of the submarine cable grow exponentially.

9. An electronic device, characterized in that: The device includes: a processor, a memory, and a system bus; The processor and the memory are connected via the system bus; The memory is used to store a program, wherein the program includes instructions, and when the instructions are executed by the processor, the processor executes the steps of the method for determining the conductor temperature according to any one of claims 1 to 6.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium is used to store a computer program, and when the computer program is executed by a terminal device, the steps of the method for determining and designing the conductor temperature according to any one of claims 1 to 6 are implemented.

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