Model selection method for grounding wire containing metal coating and related device

Abstract

The invention belongs to the technical field of composite grounding equipment, and discloses a metal-coating-containing grounding wire type selection method and related device.The method comprises the steps that according to the thermal stability coefficient of a metal-coating-containing grounding material, the whole-life-cycle minimum sectional area of a to-be-designed grounding wire is calculated; according to the full-life-cycle minimum sectional area of the to-be-designed grounding wire, the steel core minimum section specification size of the to-be-designed grounding wire is obtained; calculating a metal coating thickness calculation value meeting the corrosion resistance requirement; obtaining a section specification size design value of the to-be-designed grounding wire according to the minimum section specification size of the steel core of the to-be-designed grounding wire and the metal coating thickness calculation value meeting the corrosion resistance requirement; according to the method, the thermal stability, the mechanical strength and the corrosion resistance of the grounding wire are comprehensively considered, the design efficiency and accuracy of the grounding wire are improved based on a clear calculation process, and the reliability and the safety of a grounding system are effectively improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of composite grounding equipment, and relates to a method for selecting the cross-sectional specification of a grounding wire with a metal coating, in particular to a method for selecting a grounding wire with a metal coating and related devices. Background Art

[0002] A grounding wire with a metal coating usually consists of a steel core and a metal coating; among them, the steel core provides necessary strength and rigidity, and the metal coating (such as a copper coating or a zinc coating) provides excellent electrical conductivity and corrosion resistance. As an important electrical safety device, it has been widely used in fields such as electric power, communication, and construction to reliably connect the metal shell of electrical equipment, the cable shielding layer, and other parts that need to be grounded to the ground to ensure personal and equipment safety.

[0003] In actual engineering, the selection of a grounding wire with a metal coating is usually based on the rated current, grounding resistance, and usage environment of electrical equipment, and the minimum cross-sectional area of the grounding wire is calculated according to industry standard regulations for selection; however, due to different grounding areas where the grounding wire is located and different grounding functions, and at the same time with the continuous development of electrical equipment and the improvement of the intelligent level, the requirements for grounding wire selection are getting higher and higher, and it is often necessary to accurately calculate the cross-sectional specifications of the grounding wire; however, using the existing selection method can only determine the cross-sectional area of the grounding wire, and currently, the cross-sectional specifications of the steel core and the metal coating of the grounding wire with a metal coating are only determined according to experience, with low accuracy and low selection efficiency, and the grounding requirements of the equipment cannot be guaranteed. Summary of the Invention

[0004] Aiming at the technical problems existing in the prior art, the present invention provides a method for selecting a grounding wire with a metal coating and related devices to solve the technical problems that the cross-sectional specifications of the steel core and the metal coating of the grounding wire with a metal coating are currently only determined according to experience, with low accuracy and low selection efficiency, and the grounding requirements of the equipment cannot be guaranteed.

[0005] To achieve the above object, the technical solution adopted by the present invention is as follows: The present invention provides a method for selecting a grounding wire with a metal coating, including: Calculating the minimum cross-sectional area of the entire life cycle of the grounding wire to be designed according to the thermal stability coefficient of the grounding material with a metal coating; Obtaining the minimum cross-sectional specification size of the steel core of the grounding wire to be designed according to the minimum cross-sectional area of the entire life cycle of the grounding wire to be designed; Calculating the calculated value of the thickness of the metal coating that meets the corrosion resistance requirement; Obtaining the design value of the cross-sectional specification size of the grounding wire to be designed according to the minimum cross-sectional specification size of the steel core of the grounding wire to be designed and the calculated value of the thickness of the metal coating that meets the corrosion resistance requirement.

[0006] Further, the calculation process of the minimum cross-sectional area of the grounding wire to be designed over its entire life cycle is as follows:

[0007] Among them, is the minimum cross-sectional area of the grounding wire to be designed over its entire life cycle; is the effective value of the maximum ground fault asymmetrical current flowing through the grounding material with a metal coating; is the thermal stability coefficient of the grounding material with a metal coating; is the equivalent duration of the ground fault.

[0008] Further, the process of obtaining the minimum cross-sectional specification size of the steel core of the grounding wire to be designed based on the minimum cross-sectional area of the grounding wire to be designed over its entire life cycle includes: Determine the cross-sectional shape of the grounding wire to be designed; among them, the cross-sectional shape of the grounding wire to be designed includes a circular cross-section or a rectangular cross-section; Based on the cross-sectional shape of the grounding wire to be designed and the minimum cross-sectional area of the grounding wire to be designed over its entire life cycle, calculate the minimum cross-sectional specification size of the steel core of the grounding wire to be designed.

[0009] Further, superimpose the minimum cross-sectional specification size of the steel core of the grounding wire to be designed with the calculated value of the thickness of the metal coating that meets the anti-corrosion requirement to obtain the designed value of the cross-sectional specification size of the grounding wire to be designed.

[0010] Further, when the cross-sectional shape of the grounding wire to be designed is a circular cross-section, the calculation process of the designed value of the cross-sectional specification size of the grounding wire to be designed is as follows:

[0011]

[0012] Among them, is the designed value of the cross-sectional diameter when the cross-sectional shape of the grounding wire to be designed is a circular cross-section; is the calculated value of the minimum cross-sectional diameter of the steel core when the cross-sectional shape of the grounding wire to be designed is a circular cross-section; is the calculated value of the thickness of the metal coating that meets the anti-corrosion requirement; is the minimum cross-sectional area of the grounding wire to be designed over its entire life cycle.

[0013] Further, when the cross-sectional shape of the grounding wire to be designed is a rectangular cross-section, the calculation process of the designed value of the cross-sectional specification size of the grounding wire to be designed is as follows:

[0014]

[0015] and

[0016] Wherein, is the design value of the cross-sectional width when the cross-sectional shape of the grounding wire to be designed is a rectangular cross-section; is the calculated value of the minimum cross-sectional width of the steel core when the cross-sectional shape of the grounding wire to be designed is a rectangular cross-section; is the design value of the cross-sectional thickness when the cross-sectional shape of the grounding wire to be designed is a rectangular cross-section; is the calculated value of the minimum cross-sectional thickness of the steel core when the cross-sectional shape of the grounding wire to be designed is a rectangular cross-section; is the minimum cross-sectional thickness of the steel core specified to meet the strength requirements.

[0017] Further, the calculation process of the calculated value of the metal coating thickness meeting the anti-corrosion requirement is as follows:

[0018] Wherein, is the calculated value of the metal coating thickness meeting the anti-corrosion requirement; is the designed life of the grounding wire to be designed; is the soil corrosion rate of the area to be grounded.

[0019] The present invention also provides a grounding wire selection system with a metal coating, including: A minimum cross-sectional area calculation module, configured to calculate the minimum cross-sectional area of the grounding wire to be designed during its entire life cycle according to the thermal stability coefficient of the grounding material with a metal coating; A minimum cross-sectional specification size calculation module for the steel core, configured to obtain the minimum cross-sectional specification size of the steel core of the grounding wire to be designed according to the minimum cross-sectional area of the grounding wire to be designed during its entire life cycle; A metal coating thickness calculation module, configured to calculate the calculated value of the metal coating thickness meeting the anti-corrosion requirement; A grounding wire cross-sectional specification size calculation module, configured to obtain the designed value of the cross-sectional specification size of the grounding wire to be designed according to the minimum cross-sectional specification size of the steel core of the grounding wire to be designed and the calculated value of the metal coating thickness meeting the anti-corrosion requirement.

[0020] The present invention also provides an electronic device, including: A processor, suitable for executing a computer program; A computer-readable storage medium, in which a computer program is stored, and when the computer program is executed by the processor, it executes the grounding wire selection method with a metal coating described above.

[0021] The present invention also provides a computer-readable storage medium storing a computer program, which when executed by a processor implements the method for selecting a grounding wire with a metal cladding as described above.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows: The method for selecting a grounding wire with a metal cladding provided by the present invention first calculates the minimum cross-sectional area of the grounding wire to be designed over its entire life cycle based on the thermal stability coefficient of the grounding material with a metal cladding, which can ensure that the grounding wire maintains stable electrical conductivity and mechanical strength during long-term use, even when facing temperature changes or an increase in current load, effectively avoiding overheating, damage, or failure of the grounding wire due to insufficient thermal stability, thereby ensuring the safe operation of the power system; then, the minimum cross-sectional specification size of the steel core of the grounding wire to be designed is determined according to the minimum cross-sectional area over the entire life cycle, which can enable the grounding wire to meet the requirements of electrical conductivity while avoiding material waste; secondly, by calculating the calculated value of the metal cladding thickness that meets the anti-corrosion requirements, it can ensure that the grounding wire has sufficient anti-corrosion performance, which can extend the service life of the grounding wire and reduce the maintenance or replacement frequency due to corrosion; combining the minimum cross-sectional specification size of the steel core of the grounding wire to be designed and the calculated value of the metal cladding thickness that meets the anti-corrosion requirements, the designed value of the cross-sectional specification size of the grounding wire to be designed is determined, achieving consideration of both the electrical conductivity, mechanical strength, and thermal stability of the grounding wire and meeting the anti-corrosion requirements, providing a scientific basis for the selection of the grounding wire; by comprehensively considering the thermal stability, mechanical strength, and anti-corrosion performance of the grounding wire and based on a clear calculation process, the present invention improves the efficiency and accuracy of the grounding wire design and effectively improves the reliability and safety of the grounding system.

[0023] The grounding wire selection system, electronic device, computer-readable storage medium, and computer program product with a metal cladding provided by the present invention possess all the advantages of the above-mentioned method for selecting a grounding wire with a metal cladding. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a flowchart of the method for selecting a grounding wire with a metal cladding provided for Example 1; Figure 2 It is a structural block diagram of the grounding wire selection system with a metal cladding provided for Example 2; Figure 3 It is a structural block diagram of the electronic device provided for Example 3. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer and more understandable, the following specific embodiments are used to further elaborate on the present invention. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0026] To better understand the embodiments of the present application, the technical terms involved in the embodiments of the present application are explained as follows: The grounding device life cycle refers to the service time of the grounding device that meets the electrical, mechanical and physical-chemical performance requirements.

[0027] The present invention provides a method for selecting the type of grounding wire with a metal coating, including the following steps: Step 100: Calculate the minimum cross-sectional area of the grounding wire to be designed according to the thermal stability coefficient of the grounding material with a metal coating.

[0028] Step 200: Obtain the minimum cross-sectional specification size of the steel core of the grounding wire to be designed according to the minimum cross-sectional area of the grounding wire to be designed in the entire life cycle.

[0029] Step 300: Calculate the calculated value of the metal coating thickness that meets the corrosion resistance requirements.

[0030] Step 400: Obtain the designed value of the cross-sectional specification size of the grounding wire to be designed according to the minimum cross-sectional specification size of the steel core of the grounding wire to be designed and the calculated value of the metal coating thickness that meets the corrosion resistance requirements.

[0031] The method for selecting the type of grounding wire with a metal coating according to the present invention calculates the minimum cross-sectional area of the grounding wire to be designed in the entire life cycle according to the thermal stability coefficient of the grounding material with a metal coating; then, determines the minimum cross-sectional specification size of the steel core of the grounding wire to be designed according to the minimum cross-sectional area of the grounding wire to be designed in the entire life cycle; then, calculates the calculated value of the metal coating thickness that meets the corrosion resistance requirements; finally, combines the minimum cross-sectional specification size of the steel core and the calculated value of the metal coating thickness to obtain the designed value of the cross-sectional specification size of the grounding wire to be designed; by comprehensively considering the thermal stability and corrosion resistance of the grounding wire, the present invention determines the cross-sectional specification size, ensuring the long-term stable operation of the grounding wire and the improvement of the overall performance; at the same time, it also helps to reduce the operation and maintenance costs and improve the safety and economy of the power system.

[0032] The following uses some specific embodiments to further explain the method for selecting the type of grounding wire with a metal coating provided by the present invention: Embodiment 1 As shown in the appendix Figure 1 This Embodiment 1 provides a method for selecting the type of grounding wire with a metal coating, including the following steps: Step 1. Calculate the minimum cross-sectional area of the grounding wire to be designed over its entire life cycle according to the thermal stability coefficient of the grounding wire with a metal coating. Specifically, the calculation process for the minimum cross-sectional area of the grounding wire to be designed over its entire life cycle is as follows:

[0033]

[0034] where, is the minimum cross-sectional area of the grounding wire to be designed over its entire life cycle; is the effective value of the maximum ground fault asymmetrical current flowing through the grounding material with a metal coating; is the thermal stability coefficient of the grounding material with a metal coating; is the equivalent duration of the ground fault; is the capacity factor, J / cm 3 / ℃; is the resistance temperature coefficient at the reference temperature of ; is the resistivity at the reference temperature of ; is the reciprocal of the resistance temperature coefficient to reflect the sensitivity of the material resistance to temperature; is the maximum allowable temperature of the metal coating in the grounding wire with a metal coating; is the ambient temperature.

[0035] Taking the copper-clad steel grounding wire as an example, through the thermal stability verification of the remaining cross-section after the designed service life of the copper-clad steel grounding wire, its maximum allowable temperature is taken as the melting point temperature of copper or calculated according to the maximum allowable temperature specified in the standard (GB / T 50065-2011, Code for Design of Earthing of AC Electrical Installations); the ambient temperature is taken as 40℃; the reference temperature is taken as 20℃; the resistance temperature coefficient at the reference temperature of is taken as the resistance temperature coefficient at 20℃; the resistivity at the reference temperature of is taken as the resistivity at 20℃; through calculation, the thermal stability coefficient values of the copper-clad steel grounding wire material with different relative conductivities of copper-clad steel are shown in Table 1 below. is taken as the resistivity at 20℃; through calculation, the thermal stability coefficient values of the copper-clad steel grounding wire material with different relative conductivities of copper-clad steel are shown in Table 1 below. Taking the copper-clad steel grounding wire as an example, through the thermal stability verification of the remaining cross-section after the designed service life of the copper-clad steel grounding wire, its maximum allowable temperature

[0036] Table 1 Thermal stability coefficient of copper-clad steel grounding wire material

[0037] Step 2: Obtain the minimum cross-sectional area specification of the steel core of the grounding wire to be designed according to the minimum cross-sectional area over the entire life cycle of the grounding wire to be designed. Specifically, the process of obtaining the minimum cross-sectional area specification of the steel core of the grounding wire to be designed includes: Step 21: Determine the cross-sectional shape of the grounding wire to be designed according to the design requirements of the grounding wire; among them, the cross-sectional shape of the grounding wire to be designed includes a circular cross-section or a rectangular cross-section; when the cross-sectional shape of the grounding wire to be designed is a circular cross-section, that is, the grounding wire to be designed is a rod or wire; when the cross-sectional shape of the grounding wire to be designed is a rectangular cross-section, that is, the grounding wire to be designed is a plate.

[0038] Step 22: Calculate the minimum cross-sectional area specification of the steel core of the grounding wire to be designed based on the minimum cross-sectional area over the entire life cycle of the grounding wire to be designed according to the cross-sectional shape of the grounding wire to be designed.

[0039] Specifically, if the cross-sectional shape of the grounding wire to be designed is a circular cross-section, the calculation process of the minimum cross-sectional area specification of the steel core of the grounding wire to be designed is as follows:

[0040] Among them, is the calculated value of the minimum cross-sectional diameter of the steel core when the cross-sectional shape of the grounding wire to be designed is a circular cross-section; is the minimum cross-sectional area over the entire life cycle of the grounding wire to be designed.

[0041] Specifically, if the cross-sectional shape of the grounding wire to be designed is a rectangular cross-section, the calculation process of the calculated value of the minimum cross-sectional width of the steel core when the cross-sectional shape of the grounding wire to be designed is a rectangular cross-section and the calculated value of the minimum cross-sectional thickness of the steel core when the cross-sectional shape of the grounding wire to be designed is a rectangular cross-section is as follows:

[0042]

[0043] Among them, is the calculated value of the minimum cross-sectional width of the steel core when the cross-sectional shape of the grounding wire to be designed is a rectangular cross-section; is the calculated value of the minimum cross-sectional thickness of the steel core when the cross-sectional shape of the grounding wire to be designed is a rectangular cross-section.

[0044] It should be noted that the calculated value of the minimum cross-sectional width of the steel core when the cross-sectional shape of the grounding wire to be designed is a rectangular cross-section and the calculated value of the minimum cross-sectional thickness of the steel core when the cross-sectional shape of the grounding wire to be designed is a rectangular cross-section satisfy the condition of minimizing the material cost of the grounding wire to be designed. Specifically, as follows:

[0045] Among them, is the material cost per unit length of the grounding wire to be designed; $C_{s}$ is the cost of the steel core material per unit length in the ground wire to be designed; $C_{m}$ is the cost of the metal cladding material per unit length in the ground wire to be designed.

[0046] It should be noted that according to the cross-sectional shape of the ground wire to be designed, based on the minimum cross-sectional area of the ground wire to be designed over its entire life cycle, the minimum cross-sectional specification size of the steel core of the ground wire to be designed is calculated, and the cost of the ground wire to be designed according to the minimum cross-sectional specification size of the steel core is minimized, that is, on the premise of meeting the strength requirements and the minimum cross-sectional area over the entire life cycle, the cost of the ground wire is reduced as much as possible.

[0047] Step 3: Calculate the calculated value of the metal cladding thickness that meets the anti-corrosion requirements. The calculation process of the calculated value of the metal cladding thickness that meets the anti-corrosion requirements is as follows:

[0048] Among them, $\delta$ is the calculated value of the metal cladding thickness that meets the anti-corrosion requirements; $L$ is the designed life of the ground wire to be designed; $v$ is the soil corrosion rate of the area to be grounded.

[0049] Specifically, the process of calculating the calculated value of the metal cladding thickness that meets the anti-corrosion requirements is as follows: Step 31: Determine the soil corrosion rate of the grounding area of the ground wire to be designed; the specific process includes: obtaining and analyzing the soil in the grounding area of the ground wire to be designed; then, evaluating the corrosivity level of the soil in the grounding area of the ground wire to be designed to obtain the soil corrosivity level; finally, determining the soil corrosion rate of the grounding area of the ground wire to be designed according to the soil corrosivity level; among them, taking the copper-clad steel ground wire as an example, the average corrosion rate of copper and copper-clad steel in the soil is shown in Table 2 below.

[0050] Table 2 Average corrosion rate of copper and copper-clad steel in soil

[0051] Step 32: Calculate the calculated value of the metal cladding thickness that meets the anti-corrosion requirements according to the soil corrosion rate of the grounding area of the ground wire to be designed and the designed life of the ground wire to be designed; specifically, multiply the soil corrosion rate of the grounding area of the ground wire to be designed by the designed life of the ground wire to be designed, and the calculated value of the metal cladding thickness that meets the anti-corrosion requirements is obtained.

[0052] Step 4: Obtain the design value of the cross-sectional specification size of the grounding wire to be designed according to the minimum cross-sectional size of the steel core of the grounding wire to be designed and the calculated value of the metal cladding thickness that meets the corrosion resistance requirement. Specifically, superimpose the minimum cross-sectional size of the steel core of the grounding wire to be designed and the calculated value of the metal cladding thickness that meets the corrosion resistance requirement to obtain the design value of the cross-sectional specification size of the grounding wire to be designed.

[0053] More specifically, when the cross-sectional shape of the grounding wire to be designed is a circular cross-section, the calculation process of the design value of the cross-sectional specification size of the grounding wire to be designed is as follows:

[0054] where, is the design value of the cross-sectional diameter when the cross-sectional shape of the grounding wire to be designed is a circular cross-section; is the calculated value of the minimum cross-sectional diameter of the steel core when the cross-sectional shape of the grounding wire to be designed is a circular cross-section; is the calculated value of the metal cladding thickness that meets the corrosion resistance requirement.

[0055] More specifically, when the cross-sectional shape of the grounding wire to be designed is a rectangular cross-section, the calculation process of the design value of the cross-sectional specification size of the grounding wire to be designed is as follows:

[0056]

[0057] where, is the design value of the cross-sectional width when the cross-sectional shape of the grounding wire to be designed is a rectangular cross-section; is the calculated value of the minimum cross-sectional width of the steel core when the cross-sectional shape of the grounding wire to be designed is a rectangular cross-section; is the design value of the cross-sectional thickness when the cross-sectional shape of the grounding wire to be designed is a rectangular cross-section; is the calculated value of the minimum cross-sectional thickness of the steel core when the cross-sectional shape of the grounding wire to be designed is a rectangular cross-section.

[0058] The method for selecting the ground wire with a metal cladding described in Embodiment 1 calculates the minimum cross-sectional area of the ground wire over its entire life cycle based on the principle of thermal stability, ensuring that when the ground wire bears the maximum ground fault current, its temperature does not exceed the allowable limit, thus guaranteeing the long-term stable operation of the ground wire; calculates the minimum cross-sectional specification size of the steel core of the ground wire according to the minimum cross-sectional area of the ground wire over its entire life cycle and the cross-sectional shape of the ground wire, capable of ensuring that the electrical conductivity and mechanical strength of the ground wire meet the requirements; calculates the thickness of the metal cladding of the ground wire according to the design life of the ground wire and the soil corrosion rate of the grounding area to ensure its corrosion resistance in harsh environments; finally, superimposes the minimum cross-sectional specification size of the steel core and the thickness of the metal cladding that meets the corrosion resistance requirements as the design value of the cross-sectional specification size of the ground wire, ensuring that the ground wire not only has sufficient electrical conductivity and mechanical strength but also can maintain good corrosion resistance in harsh environments.

[0059] Embodiment 2 As shown in the Figure 2 accompanying figure, Embodiment 2 provides a ground wire selection system with a metal layer, including a minimum cross-sectional area calculation module, a minimum cross-sectional specification size calculation module for the steel core, a metal cladding thickness calculation module, and a ground wire cross-sectional specification size calculation module.

[0060] The minimum cross-sectional area calculation module is used to calculate the minimum cross-sectional area of the to-be-designed ground wire over its entire life cycle according to the thermal stability coefficient of the grounding material with a metal cladding; the minimum cross-sectional specification size calculation module for the steel core is used to obtain the minimum cross-sectional specification size of the steel core of the to-be-designed ground wire according to the minimum cross-sectional area of the to-be-designed ground wire over its entire life cycle; the metal cladding thickness calculation module is used to calculate the calculated value of the thickness of the metal cladding that meets the corrosion resistance requirements; the ground wire cross-sectional specification size calculation module is used to obtain the design value of the cross-sectional specification size of the to-be-designed ground wire according to the minimum cross-sectional specification size of the steel core of the to-be-designed ground wire and the calculated value of the thickness of the metal cladding that meets the corrosion resistance requirements.

[0061] Embodiment 3 As shown in the Figure 3 accompanying figure, Embodiment 3 provides an electronic device, including: a memory for storing a computer program; a processor for implementing the steps of the method for selecting the ground wire with a metal cladding when executing the computer program.

[0062] When the processor executes the computer program, it implements the steps of the above-mentioned method for selecting the ground wire with a metal cladding, for example: Calculate the minimum cross-sectional area of the entire life cycle of the grounding wire to be designed according to the thermal stability coefficient of the grounding material with a metal coating; obtain the minimum cross-sectional specification size of the steel core of the grounding wire to be designed according to the minimum cross-sectional area of the entire life cycle of the grounding wire to be designed; calculate the calculated value of the metal coating thickness that meets the anti-corrosion requirements; obtain the designed value of the cross-sectional specification size of the grounding wire to be designed according to the minimum cross-sectional specification size of the steel core of the grounding wire to be designed and the calculated value of the metal coating thickness that meets the anti-corrosion requirements.

[0063] Alternatively, when the processor executes the computer program, it implements the functions of each module in the above-mentioned grounding wire selection system with a metal coating. For example: The minimum cross-sectional area calculation module is used to calculate the minimum cross-sectional area of the entire life cycle of the grounding wire to be designed according to the thermal stability coefficient of the grounding material with a metal coating; the minimum cross-sectional specification size calculation module of the steel core is used to obtain the minimum cross-sectional specification size of the steel core of the grounding wire to be designed according to the minimum cross-sectional area of the entire life cycle of the grounding wire to be designed; the metal coating thickness calculation module is used to calculate the calculated value of the metal coating thickness that meets the anti-corrosion requirements; the cross-sectional specification size calculation module of the grounding wire is used to obtain the designed value of the cross-sectional specification size of the grounding wire to be designed according to the minimum cross-sectional specification size of the steel core of the grounding wire to be designed and the calculated value of the metal coating thickness that meets the anti-corrosion requirements.

[0064] Exemplarily, the computer program can be divided into one or more modules / units, and the one or more modules / units are stored in the memory and executed by the processor to complete the present invention. The one or more modules / units can be a series of computer program instruction segments capable of completing preset functions, and the instruction segments are used to describe the execution process of the computer program in the electronic device.

[0065] For example, the computer program can be divided into a minimum cross-sectional area calculation module, a minimum cross-sectional specification size calculation module of the steel core, a metal coating thickness calculation module, and a cross-sectional specification size calculation module of the grounding wire. The specific functions of each module are as follows: The minimum cross-sectional area calculation module is used to calculate the minimum cross-sectional area of the entire life cycle of the grounding wire to be designed according to the thermal stability coefficient of the grounding material with a metal coating; the minimum cross-sectional specification size calculation module of the steel core is used to obtain the minimum cross-sectional specification size of the steel core of the grounding wire to be designed according to the minimum cross-sectional area of the entire life cycle of the grounding wire to be designed; the metal coating thickness calculation module is used to calculate the calculated value of the metal coating thickness that meets the anti-corrosion requirements; the cross-sectional specification size calculation module of the grounding wire is used to obtain the designed value of the cross-sectional specification size of the grounding wire to be designed according to the minimum cross-sectional specification size of the steel core of the grounding wire to be designed and the calculated value of the metal coating thickness that meets the anti-corrosion requirements.

[0066] The electronic device can be a computing device such as a desktop computer, notebook, palm computer, and cloud server. The electronic device may include, but is not limited to, a processor and a memory. Those skilled in the art can understand that the above are examples of electronic devices and do not constitute a limitation on the electronic device. It may include more components than the above, or combine certain components, or different components. For example, the electronic device may also include input / output devices, network access devices, buses, etc.

[0067] The so-called processor may be a central processing unit (CPU), or may also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor, or the processor may also be any conventional processor, etc. The processor is the control center of the electronic device, connecting various parts of the entire electronic device through various interfaces and lines.

[0068] The memory can be used to store the computer program and / or module. The processor realizes various functions of the electronic device by running or executing the computer program and / or module stored in the memory, and by calling the data stored in the memory.

[0069] The memory mainly includes a program storage area and a data storage area. Among them, the program storage area can store an operating system, application programs required for at least one function (such as a sound playback function, an image playback function, etc.); the data storage area can store data created according to the use of the mobile phone (such as audio data, phone book, etc.). In addition, the memory may include high-speed random access memory, and may also include non-volatile memory, such as a hard disk, memory, plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, at least one magnetic disk storage device, flash device, or other volatile solid-state storage devices.

[0070] Embodiment 4 Embodiment 4 of the present invention also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program. When the computer program is executed by a processor, the steps of the method for selecting a grounding wire with a metal coating are implemented, for example: According to the requirements of the configuration software, determine the picture resources that need to be pre-loaded, and obtain the pre-loaded pictures; according to the requirements of the configuration software, determine the picture resources that need to be pre-loaded, and obtain the pre-loaded pictures; use the ImageIcon class provided by Java Swing to define a private member variable imageCache of type HashMap<String, ImageIcon> to obtain the predefined local picture cache; monitor whether a preset event occurs or determine whether the preset timing time is reached; if so, store the pre-loaded pictures in the predefined local picture cache; according to the received interface display request, obtain the picture resources to be displayed from the predefined local picture cache, and display the picture resources to be displayed; clean up the picture resources to be displayed stored in the predefined local picture cache according to the preset cache size limit or preset time interval.

[0071] If the modules / units integrated in the grounding wire selection system with metal cladding are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium.

[0072] Based on such an understanding, all or part of the processes in the above-mentioned grounding wire selection method with metal cladding of the present invention can also be completed by instructing relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, the steps of the above-mentioned grounding wire selection method with metal cladding can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in the form of source code, object code, executable file or preset intermediate form, etc.

[0073] The computer-readable storage medium can include: any entity or device that can carry the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal, and software distribution medium, etc.

[0074] It should be noted that those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned method embodiments can be completed by instructing relevant hardware through a computer program. The program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the above-mentioned method embodiments.

[0075] The method for selecting the grounding wire with a metal coating according to the present invention calculates the minimum cross-sectional area in the whole life cycle, ensuring that the grounding wire will not overheat when bearing the maximum grounding fault current, thereby improving the stability and safety of the grounding wire; according to the cross-sectional shape of the grounding wire and the minimum cross-sectional area in the whole life cycle, the minimum cross-sectional specification size of the steel core is calculated, making the cross-sectional design of the grounding wire more reasonable, meeting both the requirements of electrical conductivity and mechanical strength and saving material costs; by calculating the thickness of the metal coating that meets the anti-corrosion requirements, it is ensured that the grounding wire can maintain good anti-corrosion performance in harsh environments and extends the service life of the grounding wire.

[0076] The above embodiments are only one of the implementation manners capable of implementing the technical solution of the present invention. The scope of protection required by the present invention is not limited only by this embodiment, but also includes any changes, substitutions and other implementation manners that are easily conceivable by those skilled in the art within the technical scope disclosed by the present invention.

Claims

1. A method for selecting a grounding wire with a metal coating, characterized in that: include: Calculate the minimum cross-sectional area of ​​the grounding wire to be designed over its entire life cycle based on the thermal stability coefficient of the grounding material containing the metal coating; According to the minimum cross-sectional area of ​​the grounding wire to be designed over its entire life cycle, the minimum cross-sectional specification size of the steel core of the grounding wire to be designed is obtained; Calculate the thickness of the metal coating that meets the corrosion resistance requirements; According to the minimum cross-sectional dimensions of the steel core of the grounding wire to be designed and the calculated value of the metal coating thickness that meets the corrosion resistance requirements, the design values ​​of the cross-sectional dimensions of the grounding wire to be designed are obtained.

2. A method for selecting a grounding wire with a metal coating according to claim 1, characterized in that: The calculation process of the minimum cross-sectional area of ​​the grounding wire to be designed during its entire life cycle is as follows: in, The minimum cross-sectional area of ​​the grounding wire to be designed during its entire life cycle; is the maximum ground fault asymmetric current effective value flowing through the grounding material containing metal coating; is the thermal stability coefficient of the grounding material containing the metal coating; is the equivalent duration of the ground fault.

3. The method for selecting a grounding wire with a metal coating according to claim 1, characterized in that: The process of obtaining the minimum cross-sectional size of the steel core of the grounding wire to be designed according to the minimum cross-sectional area of ​​the grounding wire to be designed during its entire life cycle includes: Determine the cross-sectional shape of the grounding wire to be designed; wherein the cross-sectional shape of the grounding wire to be designed includes a circular cross-sectional shape or a rectangular cross-sectional shape; According to the cross-sectional shape of the grounding wire to be designed and based on the minimum cross-sectional area of ​​the grounding wire to be designed over its entire life cycle, the minimum cross-sectional specifications and dimensions of the steel core of the grounding wire to be designed are calculated.

4. A method for selecting a grounding wire with a metal coating according to claim 3, characterized in that: The minimum cross-sectional dimensions of the steel core of the grounding wire to be designed are superimposed with the calculated value of the metal coating thickness that meets the corrosion resistance requirements to obtain the design value of the cross-sectional dimensions of the grounding wire to be designed.

5. A method for selecting a grounding wire with a metal coating according to claim 4, characterized in that: When the cross-sectional shape of the grounding wire to be designed is a circular cross-sectional shape, the calculation process of the cross-sectional specification and dimension design value of the grounding wire to be designed is as follows: in, The design value of the cross-sectional diameter when the cross-sectional shape of the grounding wire to be designed is a circular cross-sectional shape; The calculated value of the minimum cross-sectional diameter of the steel core when the cross-sectional shape of the grounding wire to be designed is a circular cross-sectional shape; Calculated value of metal coating thickness to meet corrosion resistance requirements; It is the minimum cross-sectional area of ​​the grounding wire to be designed during its entire life cycle.

6. A method for selecting a grounding wire with a metal coating according to claim 4, characterized in that: When the cross-sectional shape of the grounding wire to be designed is a rectangular cross-sectional shape, the calculation process of the cross-sectional specification and dimension design value of the grounding wire to be designed is as follows: and in, The cross-sectional width design value when the cross-sectional shape of the grounding wire to be designed is a rectangular cross-sectional shape; The calculated value of the minimum cross-sectional width of the steel core when the cross-sectional shape of the grounding wire to be designed is a rectangular cross-sectional shape; The design value of the cross-sectional thickness when the cross-sectional shape of the grounding wire to be designed is a rectangular cross-sectional shape; The calculated value of the minimum cross-sectional thickness of the steel core when the cross-sectional shape of the grounding wire to be designed is a rectangular cross-sectional shape; The minimum cross-sectional thickness of the steel core specified to meet strength requirements.

7. The method for selecting a grounding wire with a metal coating according to claim 1, characterized in that: The calculation process of the metal coating thickness that meets the corrosion resistance requirements is as follows: in, Calculated value of metal coating thickness to meet corrosion resistance requirements; The design life of the ground wire to be designed; is the soil corrosion rate in the area to be grounded.

8. A system for selecting a grounding wire with a metal coating, characterized in that: include: The minimum cross-sectional area calculation module is used to calculate the minimum cross-sectional area of ​​the grounding wire to be designed over its entire life cycle according to the thermal stability coefficient of the grounding material containing the metal coating; A steel core minimum cross-sectional specification and size calculation module is used to obtain the minimum cross-sectional specifications and sizes of the steel core of the grounding wire to be designed according to the minimum cross-sectional area of ​​the grounding wire to be designed throughout its life cycle; Metal coating thickness calculation module, used to calculate the metal coating thickness that meets the corrosion resistance requirements; The grounding wire cross-section specification and dimension calculation module is used to obtain the cross-section specification and dimension design value of the grounding wire to be designed according to the minimum cross-section specification and dimension of the steel core of the grounding wire to be designed and the calculated value of the metal coating thickness that meets the corrosion resistance requirements.

9. An electronic device, characterized in that: include: a processor suitable for executing a computer program; A computer-readable storage medium, wherein a computer program is stored in the computer-readable storage medium, and when the computer program is executed by the processor, the method for selecting a grounding wire containing a metal coating according to any one of claims 1 to 7 is executed.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the method for selecting a grounding wire containing a metal coating as described in any one of claims 1 to 7 is implemented.

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