A method and device for obtaining an initial value of a carrying capacity of a capacitated conductor

Abstract

The application discloses a method and device for obtaining an initial carrying capacity of a capacity-increased conductor. The method comprises the following steps: obtaining an environmental parameter of the capacity-increased conductor, generating an environmental parameter point of the capacity-increased conductor according to the environmental parameter, determining an environmental parameter condition point closest to the environmental parameter point in a pre-established environmental parameter initial carrying capacity point set of the capacity-increased conductor as a target environmental parameter point, and determining an initial maximum allowed carrying capacity corresponding to the target environmental parameter point as the initial carrying capacity of the capacity-increased conductor. It can be seen that the target environmental parameter point matched with the current environmental parameter point can be quickly found by querying the pre-established environmental parameter initial carrying capacity point set, and the initial carrying capacity is obtained. The environmental parameter initial carrying capacity point set comprises a plurality of environmental parameter condition points and the initial maximum allowed carrying capacity corresponding to the environmental parameter condition points. It can be seen that each initial maximum allowed carrying capacity is determined according to the environmental parameter condition, and therefore the initial carrying capacity has higher precision.

Description

Technical Field

[0001] This application relates to the field of power technology, and more specifically, to a method and apparatus for obtaining the initial value of the allowable current carrying capacity of a conductor with increased capacity. Background Technology

[0002] With the continuous increase in electricity load, it is necessary to improve transmission capacity without changing existing transmission lines. Currently, without violating existing technical regulations, the maximum allowable current carrying capacity of the line can be obtained based on the capacity expansion model, thereby improving the transmission efficiency and capacity of the transmission system. The current carrying capacity of the expansion conductor is closely related to meteorological environmental parameters. Under a given maximum allowable operating temperature of the expansion conductor, its current carrying capacity is mainly determined by four meteorological factors: air temperature, wind speed, wind direction, and solar radiation intensity. Based on this, the maximum allowable current carrying capacity of the expansion conductor currently needs to be solved iteratively. However, the iterative solution method is inefficient. Therefore, a single-step solution method should be used on the terminal equipment to increase the maximum current carrying capacity. At this time, the selection of the initial value of the allowable current carrying capacity is particularly important. A reasonable initial value will ensure that the calculation accuracy of the maximum allowable current carrying capacity is high enough.

[0003] However, the environmental parameters of the capacity-increasing conductor change in real time and are uncertain. Calculating the initial value of the allowable current carrying capacity using a non-iterative method results in a large error in the accuracy of the calculation. Therefore, the accuracy and efficiency of the maximum allowable current carrying capacity cannot be guaranteed at the same time. Summary of the Invention

[0004] In view of the above problems, this application is proposed to provide a method and apparatus for obtaining the initial value of the allowable current carrying capacity of the expansion conductor, so as to efficiently and accurately select the initial value of the allowable current carrying capacity of the expansion conductor, thereby accurately and in real time calculating the maximum allowable current carrying capacity of the expansion conductor under specific environmental parameters.

[0005] To achieve the above objectives, the following specific solutions are proposed:

[0006] A method for obtaining the initial value of the allowable current carrying capacity of a capacity-enhancing conductor includes:

[0007] Obtain environmental parameters at the target location where the capacity-enhancing conductor is located;

[0008] Based on the environmental parameters, generate the environmental parameter points for the capacity-enhancing conductor;

[0009] In the pre-established set of initial environmental parameter load points for the capacity-increasing conductor, the environmental parameter condition point with the closest Euclidean distance to the environmental parameter point is determined as the target environmental parameter point. The set of initial environmental parameter load points includes several environmental parameter condition points and the initial maximum allowable current carrying capacity corresponding to each environmental parameter condition point.

[0010] The initial value of the maximum allowable current carrying capacity corresponding to the target environmental parameter point is determined as the initial value of the allowable current carrying capacity of the capacity-enhancing conductor.

[0011] Optionally, the process of constructing the initial value set of the environmental parameter load includes:

[0012] Obtain the physical parameters of the capacity-enhancing conductor and the environmental parameter range set of the target location, wherein the environmental parameter range set includes multiple environmental parameter variation ranges;

[0013] The environmental parameter is divided according to the classification standard of each environmental parameter range, and multiple parameter values ​​of the environmental parameter range are determined.

[0014] Based on the parameter values ​​of each gear within each environmental parameter range, several environmental parameter condition points are determined.

[0015] For each environmental parameter condition point, based on the physical parameters of the capacity-enhancing conductor, calculate the initial value of the maximum allowable current carrying capacity of the capacity-enhancing conductor under the environmental parameter condition point;

[0016] By summarizing the initial values ​​of the maximum allowable current carrying capacity of the expanded conductor under various environmental parameter conditions, the set of initial environmental parameter allowable current carrying capacity points of the expanded conductor is obtained.

[0017] Optionally, each of the environmental parameter condition points consists of ambient temperature, wind speed, and solar radiation intensity;

[0018] For each environmental parameter condition point, based on the physical parameters of the capacity-enhancing conductor, the initial value of the maximum allowable current-carrying capacity of the capacity-enhancing conductor under the environmental parameter condition point is calculated, including:

[0019] Based on the ambient temperature at each environmental parameter condition point, calculate the radiative heat dissipation power per unit length of the capacity-enhancing conductor at that environmental parameter condition point.

[0020] Calculate the convective heat dissipation power of the capacity-enhancing conductor at each environmental parameter condition point based on the wind speed at that environmental parameter condition point.

[0021] Calculate the solar heat absorption power of the expansion conductor at each environmental parameter condition point based on the solar radiation intensity at that environmental parameter condition point.

[0022] Using the rated current carrying capacity of the expansion conductor as an initial value, and based on the physical parameters of the expansion conductor, the AC / DC resistance ratio of the expansion conductor is calculated.

[0023] Based on the AC / DC resistance ratio and the maximum allowable temperature of the capacitance-enhancing conductor, the AC resistance per unit length of the capacitance-enhancing conductor is determined.

[0024] For each environmental parameter condition point, based on the radiative heat dissipation power, convective heat dissipation power, and solar heat absorption power per unit length at that environmental parameter condition point, as well as the AC resistance per unit length, the initial value of the maximum allowable current carrying capacity of the capacity-enhancing conductor at that environmental parameter condition point is determined.

[0025] Optionally, determining the initial value of the maximum allowable current carrying capacity of the expansion conductor at each environmental parameter condition point, based on the radiative heat dissipation power, convective heat dissipation power, and solar heat absorption power per unit length at that environmental parameter condition point, and the AC resistance per unit length, includes:

[0026] The initial value of the maximum allowable current carrying capacity of the enhanced conductor under each environmental parameter condition point is calculated using the following formula:

[0027]

[0028] Among them, I max W represents the initial value of the maximum allowable current carrying capacity of the expansion conductor under each environmental parameter condition point. R W represents the radiative heat dissipation power per unit length under the given environmental parameter conditions. F W represents the convective heat dissipation power at this environmental parameter point. S R represents the solar heat absorption power under this environmental parameter condition. AC The resistance per unit length is the AC resistance.

[0029] Optionally, after determining the initial value of the maximum allowable current carrying capacity of the expansion conductor at each environmental parameter condition point based on the radiative heat dissipation power, convective heat dissipation power, and solar heat absorption power per unit length at that environmental parameter condition point, and the AC resistance per unit length, the method further includes:

[0030] For each environmental parameter condition point, determine whether the error between the initial value of the maximum allowable current carrying capacity of the capacity-enhancing conductor at that environmental parameter condition point and the rated current carrying capacity is greater than a preset error;

[0031] If so, the initial value of the maximum allowable current carrying capacity of the expansion conductor under the environmental parameter condition point is taken as the new rated current carrying capacity of the expansion conductor, and the process is returned to execute the step of using the rated current carrying capacity of the expansion conductor as the initial value and calculating the AC / DC resistance ratio of the expansion conductor based on the physical parameters of the expansion conductor.

[0032] If not, then the initial value of the maximum allowable current carrying capacity of the increased conductor under the environmental parameter condition point shall be determined as the final initial value of the maximum allowable current carrying capacity under the environmental parameter condition point.

[0033] A device for obtaining the initial value of the allowable current carrying capacity of a capacity-enhancing conductor includes:

[0034] The environmental parameter acquisition unit is used to acquire the environmental parameters of the target location where the capacity expansion conductor is located;

[0035] An environmental parameter point generation unit is used to generate environmental parameter points for the capacity-enhancing conductor based on the environmental parameters.

[0036] The target environmental parameter point determination unit is used to determine the environmental parameter condition point that is closest to the environmental parameter point in the pre-established set of initial environmental parameter load points of the capacity-increasing conductor as the target environmental parameter point. The set of initial environmental parameter load points includes several environmental parameter condition points and the initial maximum allowable current carrying capacity corresponding to each environmental parameter condition point.

[0037] The initial allowable current carrying capacity determination unit is used to determine the initial maximum allowable current carrying capacity corresponding to the target environmental parameter point as the initial allowable current carrying capacity of the capacity-enhancing conductor.

[0038] Optionally, the device may also include:

[0039] An environmental parameter range set acquisition unit is used to acquire the physical parameters of the capacity-enhancing conductor and the environmental parameter range set of the target location, wherein the environmental parameter range set includes multiple environmental parameter variation ranges;

[0040] The grading unit is used to divide the environmental parameter according to the grading standard of each environmental parameter range and determine multiple grading parameter values ​​for the environmental parameter range.

[0041] The grade point determination unit is used to determine several environmental parameter condition points based on the parameter values ​​of each grade within each environmental parameter range.

[0042] The maximum allowable initial value calculation unit is used to calculate the maximum allowable current carrying capacity of the expansion conductor at each environmental parameter condition point based on the physical parameters of the expansion conductor at that environmental parameter condition point.

[0043] The initial value point set construction unit is used to summarize the initial value of the maximum allowable current carrying capacity of the capacity-enhancing conductor under various environmental parameter conditions, and obtain the initial value point set of the environmental parameter allowable current carrying capacity of the capacity-enhancing conductor.

[0044] Optionally, each of the environmental parameter condition points consists of ambient temperature, wind speed, and solar radiation intensity;

[0045] The maximum allowable initial load calculation unit includes:

[0046] The unit length radiative heat dissipation power calculation unit is used to calculate the unit length radiative heat dissipation power of the capacity-enhancing conductor at each environmental parameter condition point based on the ambient temperature at that environmental parameter condition point.

[0047] The convection heat dissipation power calculation unit is used to calculate the convection heat dissipation power of the capacity expansion conductor at each environmental parameter condition point based on the wind speed at that environmental parameter condition point.

[0048] The solar heat absorption power calculation unit is used to calculate the solar heat absorption power of the capacity-enhancing conductor at each environmental parameter condition point based on the solar intensity at that environmental parameter condition point.

[0049] An AC / DC resistance ratio calculation unit is used to calculate the AC / DC resistance ratio of the capacity-enhancing conductor based on the rated current carrying capacity of the capacity-enhancing conductor as an initial value and the physical parameters of the capacity-enhancing conductor.

[0050] A unit length AC resistance calculation unit is used to determine the unit length AC resistance of the capacity-enhancing wire based on the AC / DC resistance ratio and the maximum allowable temperature of the capacity-enhancing wire.

[0051] The maximum allowable initial value determination unit is used to determine the initial value of the maximum allowable current carrying capacity of the capacity-enhancing conductor at each environmental parameter condition point, based on the radiative heat dissipation power, convective heat dissipation power, and solar heat absorption power per unit length at the environmental parameter condition point, as well as the AC resistance per unit length at the environmental parameter condition point.

[0052] Optionally, the maximum allowable initial load determination unit includes:

[0053] The maximum allowable initial load value determination subunit is used to calculate the initial maximum allowable current carrying capacity of the increased conductor at each environmental parameter condition point using the following formula:

[0054]

[0055] Among them, I max W represents the initial value of the maximum allowable current carrying capacity of the expansion conductor under each environmental parameter condition point. R W represents the radiative heat dissipation power per unit length under the given environmental parameter conditions. F W represents the convective heat dissipation power at this environmental parameter point. S R represents the solar heat absorption power under this environmental parameter condition. AC The resistance per unit length is the AC resistance.

[0056] Optionally, the device may also include:

[0057] The error judgment unit is used to determine, for each environmental parameter condition point, after determining the initial value of the maximum allowable current carrying capacity of the capacity-enhancing conductor at the environmental parameter condition point based on the radiative heat dissipation power, convective heat dissipation power, solar heat absorption power per unit length, and the AC resistance per unit length at the environmental parameter condition point, whether the error value between the initial value of the maximum allowable current carrying capacity of the capacity-enhancing conductor at that environmental parameter condition point and the rated current carrying capacity is greater than a preset error. If yes, the rated current carrying capacity update unit is executed; if no, the final value determination unit is executed.

[0058] The rated current carrying capacity update unit is used to take the initial value of the maximum allowable current carrying capacity of the capacity-enhancing conductor under the environmental parameter condition point as the new rated current carrying capacity of the capacity-enhancing conductor, and return to execute the AC / DC resistance ratio calculation unit.

[0059] The final value determination unit is used to determine the initial value of the maximum allowable current carrying capacity of the capacity-enhancing conductor under the environmental parameter condition point as the final initial value of the maximum allowable current carrying capacity under the environmental parameter condition point.

[0060] By means of the above technical solution, this application obtains the environmental parameters of the target location where the capacity expansion conductor is located, generates environmental parameter points for the capacity expansion conductor based on the environmental parameters, and determines the environmental parameter condition point with the closest Euclidean distance to the environmental parameter point in the pre-established set of initial allowable load points for the capacity expansion conductor as the target environmental parameter point. The set of initial allowable load points for the environmental parameters includes several environmental parameter condition points and the initial maximum allowable current carrying capacity corresponding to each environmental parameter condition point. The initial maximum allowable current carrying capacity corresponding to the target environmental parameter point is determined as the initial allowable current carrying capacity of the capacity expansion conductor. Therefore, by querying the pre-established set of initial allowable environmental parameter values, the target environmental parameter point that matches the current environmental parameter point can be quickly found, thereby quickly obtaining the initial allowable flow rate. The set of initial allowable environmental parameter values ​​includes multiple environmental parameter condition points and their corresponding initial maximum allowable flow rate values. It can be seen that each initial maximum allowable flow rate value is determined in advance according to its environmental parameter conditions. Therefore, the determined initial allowable flow rate value has higher accuracy, thus enabling the rapid and accurate calculation of the maximum allowable flow rate under specific environmental parameters using the initial allowable flow rate value. Attached Figure Description

[0061] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0062] Figure 1 A schematic diagram of a process for obtaining the initial value of the allowable current carrying capacity of a capacity-enhancing conductor, provided for an embodiment of this application;

[0063] Figure 2 A schematic diagram illustrating a process for constructing an initial value set of environmental parameter loads, provided in an embodiment of this application;

[0064] Figure 3 A schematic diagram of a device for obtaining the initial value of the allowable current carrying capacity of a conductor, provided for an embodiment of this application;

[0065] Figure 4 This is a schematic diagram of a device structure for obtaining the initial value of the allowable current carrying capacity of a conductor, as provided in an embodiment of this application. Detailed Implementation

[0066] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0067] The proposed solution can be implemented based on a terminal with data processing capabilities, such as a computer, server, or cloud platform.

[0068] Next, combined Figure 1 The method for obtaining the initial value of the allowable current carrying capacity of the capacity-enhancing conductor in this application may include the following steps:

[0069] Step S110: Obtain the environmental parameters of the target location where the capacity-enhancing conductor is located.

[0070] Specifically, the capacity-enhancing conductor can be a carbon fiber composite core capacity-enhancing conductor, and the target location can represent the dynamic capacity-enhancing control point of the conductor. Environmental parameters can include the local real-time temperature of the conductor, the real-time wind speed perpendicular to the direction of the conductor, and the real-time solar radiation intensity of the conductor.

[0071] Step S120: Generate environmental parameter points for the capacity-enhancing conductor based on environmental parameters.

[0072] Specifically, the environmental parameter point can be represented as (t, v, q), where t represents the real-time temperature, v represents the real-time wind speed, and q represents the real-time solar radiation intensity.

[0073] Step S130: In the pre-established set of initial environmental parameter load points for the capacity-increasing conductor, the environmental parameter condition point with the closest Euclidean distance to the environmental parameter point is determined as the target environmental parameter point.

[0074] The initial value set of environmental parameter allowable load points may include several environmental parameter condition points, as well as the initial value of the maximum allowable current carrying capacity corresponding to each environmental parameter condition point.

[0075] Specifically, the Euclidean distance between the environmental parameter point and each environmental parameter condition point in the set of initial environmental parameter load points can be calculated. For example, for example point (t) N ,v M ,q J The Euclidean distance between the environmental parameter point and the example point is: When the example point is the environmental parameter condition point that has the closest Euclidean distance to the environmental parameter point, the example point (t) is determined. N ,v M ,q J () represents the target environmental parameter point.

[0076] Step S140: Determine the initial value of the maximum allowable current carrying capacity corresponding to the target environmental parameter point as the initial value of the allowable current carrying capacity of the expansion conductor.

[0077] It is understandable that, since each environmental parameter condition point has a corresponding initial value of maximum allowable current carrying capacity, the initial value of the maximum allowable current carrying capacity corresponding to the target environmental parameter point can be determined as the initial value of the allowable current carrying capacity of the increased conductor.

[0078] Furthermore, after determining the initial value of the allowable current carrying capacity of the upgraded conductor, the maximum allowable current carrying capacity of the upgraded conductor can be calculated based on the initial value of the allowable current carrying capacity and in combination with the physical parameters of the upgraded conductor.

[0079] The physical parameters of the capacity-enhancing conductor may include conductor span, conductor height difference, conductor type, conductor resistance temperature coefficient, conductor outer diameter, DC resistance at 20℃, conductor carbon core outer diameter, conductor aluminum wire area, conductor surface heat absorption coefficient, and radiative heat dissipation coefficient.

[0080] The method for obtaining the initial value of the allowable current carrying capacity of the capacity expansion conductor provided in this embodiment obtains the environmental parameters of the target location where the capacity expansion conductor is located, generates environmental parameter points for the capacity expansion conductor based on the environmental parameters, and determines the environmental parameter condition point with the closest Euclidean distance to the environmental parameter point in the pre-established set of initial value points of the allowable current carrying capacity of the capacity expansion conductor as the target environmental parameter point. The set of initial value points of the allowable current carrying capacity of the environmental parameter includes several environmental parameter condition points and the initial value of the maximum allowable current carrying capacity corresponding to each environmental parameter condition point. The initial value of the maximum allowable current carrying capacity corresponding to the target environmental parameter point is determined as the initial value of the allowable current carrying capacity of the capacity expansion conductor. Therefore, by querying the pre-established set of initial allowable environmental parameter values, the target environmental parameter point that matches the current environmental parameter point can be quickly found, thereby quickly obtaining the initial allowable flow rate. The set of initial allowable environmental parameter values ​​includes multiple environmental parameter condition points and their corresponding initial maximum allowable flow rate values. It can be seen that each initial maximum allowable flow rate value is determined in advance according to its environmental parameter conditions. Therefore, the determined initial allowable flow rate value has higher accuracy, thus enabling the rapid and accurate calculation of the maximum allowable flow rate under specific environmental parameters using the initial allowable flow rate value.

[0081] In some embodiments of this application, the process of constructing the initial value set of environmental parameter load mentioned in the above embodiments is described, such as... Figure 2 As shown, the process may include:

[0082] Step S210: Obtain the physical parameters of the capacity-enhancing conductor and the range of environmental parameters for the target location.

[0083] The environmental parameter range set can include multiple environmental parameter variation ranges, such as the temperature variation range at the target location, the wind speed variation range perpendicular to the expansion conductor, and the solar radiation intensity range at the target location. The physical parameters of the expansion conductor can include conductor span, conductor height difference, conductor type, conductor resistance temperature coefficient, conductor outer diameter, DC resistance at 20℃, conductor carbon core outer diameter, conductor aluminum wire area, conductor surface heat absorption coefficient, and radiative heat dissipation coefficient.

[0084] Step S220: Divide the environmental parameter according to the grade division standard of each environmental parameter range, and determine multiple grade parameter values ​​for the environmental parameter range.

[0085] For example, when the temperature range is 0-40℃, and the range is divided into four equal parts, the parameter values ​​for each temperature level can be determined as 10℃, 20℃, and 30℃. When the wind speed range is 0-6m / s, and the range is divided into three equal parts, the parameter values ​​for each wind speed level can be determined as 2m / s, 4m / s, etc. When the solar radiation intensity range is 0-2000W / m²...2 When the solar radiation intensity range is divided into four equal parts, the parameter values ​​for multiple ranges of solar radiation intensity can be determined to be 500W / m². 2 1000W / m 2 and 1500W / m 2 .

[0086] Step S230: Based on the parameter values ​​of each gear in each environmental parameter range, determine several environmental parameter condition points.

[0087] For example, when the temperature range has multiple parameter values ​​of 10℃, 20℃, and 30℃, the wind speed range has multiple parameter values ​​of 2m / s and 4m / s, and the solar radiation intensity range has multiple parameter values ​​of 500W / m 2 1000W / m 2 and 1500W / m 2 At that time, the following 18 environmental parameter condition points can be obtained:

[0088] [t,v,q]=[(10,2,500),(20,2,500),(30,2,500),(10,4,500),(20,4,500),(30,4,500),(10,2,1000),(20,2,1000),(30,2,1000) ,(10,4,1000),(20,4,1000),(30,4,1000),(10,2,1500),(20,2,1500),(30,2,1500),(10,4,1500),(20,4,1500),(30,4,1500)].

[0089] Step S240: For each environmental parameter condition point, calculate the initial value of the maximum allowable current carrying capacity of the expansion conductor under the environmental parameter condition point based on the physical parameters of the expansion conductor.

[0090] Specifically, when each environmental parameter condition point consists of ambient temperature, wind speed, and solar radiation intensity, the process of calculating the initial value of the maximum allowable current carrying capacity of the conductor under each environmental parameter condition point, based on the physical parameters of the conductor, may include:

[0091] Step S2401: Calculate the radiative heat dissipation power per unit length of the capacity-enhancing conductor at each environmental parameter condition point based on the ambient temperature at that environmental parameter condition point.

[0092] Specifically, the radiative heat dissipation power per unit length of the capacity-enhancing conductor can be calculated using the following formula at each environmental parameter condition point:

[0093] W R =πDE1s[(Tmax +273) 4 -(T+273) 4 ]

[0094] Among them, W R Let be the radiative heat dissipation power per unit length, D be the outer diameter of the capacitance-enhancing conductor, E1 be the radiative heat dissipation coefficient of the conductor surface, and s be the Stefan-Boltzmann constant, which is 5.67 × 10⁻⁶. -8 W / m 2 T represents the ambient temperature at each environmental parameter condition point. max This refers to the maximum permissible temperature of the capacity-enhancing conductor.

[0095] Step S2402: Calculate the convective heat dissipation power of the expansion conductor at each environmental parameter condition point based on the wind speed at that environmental parameter condition point.

[0096] Specifically, the convective heat dissipation power of the capacity-enhancing conductor at each environmental parameter condition point can be calculated using the following formula:

[0097]

[0098] Where, λ f Let V be the heat transfer coefficient of the surface air layer of the expansion conductor, V be the kinematic viscosity of the surface air layer, v be the wind speed at each environmental parameter condition point, and θ be the wind direction perpendicular to the expansion conductor.

[0099] Step S2403: Calculate the solar heat absorption power of the expansion conductor at each environmental parameter condition point based on the solar radiation intensity at that environmental parameter condition point.

[0100] Specifically, the solar heat absorption power of the expansion conductor at each environmental parameter condition point can be calculated using the following formula:

[0101] W S = s qD

[0102] Where, α s Let q be the heat absorption coefficient of the conductor surface for increasing capacity, and q be the wind speed at each environmental parameter condition point.

[0103] Step S2404: Using the rated current carrying capacity of the capacity-enhancing conductor as the initial value, and based on the physical parameters of the capacity-enhancing conductor, calculate the AC / DC resistance ratio of the capacity-enhancing conductor.

[0104] Step S2405: Determine the AC resistance per unit length of the capacitor-enhancing conductor based on the AC / DC resistance ratio and the maximum allowable temperature of the capacitor-enhancing conductor.

[0105] Specifically, the AC / DC resistance ratio of the capacitor-enhancing wire can be calculated using the following formula:

[0106]

[0107] Among them, R AC R is the AC resistance per unit length. DC R is the DC resistance per unit length of the capacitor-enhancing wire. 20 α is the DC resistance per unit length of the conductor at 20 degrees Celsius, k1 is the skin effect coefficient, k2 is the iron loss coefficient, A is the area of ​​the aluminum wire portion of the conductor, I0 is the rated current carrying capacity of the conductor, and f is the AC current frequency.

[0108] Step S2406: For each environmental parameter condition point, based on the radiative heat dissipation power, convective heat dissipation power, and solar heat absorption power per unit length, as well as the AC resistance per unit length, determine the initial value of the maximum allowable current carrying capacity of the expansion conductor at the environmental parameter condition point.

[0109] Specifically, the initial value of the maximum allowable current carrying capacity of the increased conductor under environmental parameter conditions can be calculated using the following formula:

[0110]

[0111] Among them, I max To determine the initial value of the maximum allowable current carrying capacity of the conductor under each environmental parameter condition point, W R W represents the radiative heat dissipation power per unit length under the given environmental parameter conditions. F W represents the convective heat dissipation power at this environmental parameter point. S R represents the solar heat absorption power under this environmental parameter condition. AC The resistance is the AC resistance per unit length.

[0112] Step S250: Summarize the initial values ​​of the maximum allowable current carrying capacity of the conductor under various environmental parameter conditions to obtain the set of initial environmental parameter allowable current carrying capacity points for the conductor.

[0113] The method for obtaining the initial value of the allowable current carrying capacity of the expansion conductor provided in this embodiment calculates the radiative heat dissipation power, convective heat dissipation power, and solar heat absorption power per unit length of the expansion conductor under each environmental parameter condition point. Using the rated current carrying capacity of the expansion conductor as the initial value, and based on the physical parameters of the expansion conductor, the AC / DC resistance ratio of the expansion conductor is calculated. Combined with the maximum allowable temperature of the expansion conductor, the AC resistance per unit length of the expansion conductor is determined. Thus, the initial value of the maximum allowable current carrying capacity of the expansion conductor under each environmental parameter condition point is determined. It can be seen that by classifying air temperature, wind speed, and solar radiation intensity into multiple benchmark points, calculating the initial value of the maximum allowable current carrying capacity for each of these benchmark points, and constructing a set of initial value points for environmental parameter allowable current carrying capacity, the initial value of the maximum allowable current carrying capacity for each environmental parameter condition point in the set of initial value points for environmental parameter allowable current carrying capacity is more reasonable.

[0114] Considering that iterating the initial value of the maximum allowable current carrying capacity under each environmental parameter condition point multiple times during the construction of the initial value set of environmental parameter allowable load points can improve the accuracy of the initial value of the maximum allowable current carrying capacity, based on this, in some embodiments of this application, after determining the initial value of the maximum allowable current carrying capacity of the expansion conductor under the environmental parameter condition point in step S2406 of the above embodiments, for each environmental parameter condition point, based on the radiative heat dissipation power, convective heat dissipation power, and solar heat absorption power per unit length under the environmental parameter condition point, as well as the AC resistance per unit length, the following may be included:

[0115] S1. For each environmental parameter condition point, determine whether the error between the initial value of the maximum allowable current carrying capacity of the capacity-increasing conductor at that environmental parameter condition point and the rated current carrying capacity is greater than the preset error. If yes, execute S2; otherwise, execute S3.

[0116] Specifically, the preset error can represent the convergence scale of the initial value of the maximum allowable current carrying capacity at each environmental parameter condition point. The preset error can be customized, such as 0.01A.

[0117] Understandably, if the error between the initial maximum allowable current carrying capacity of the conductor at each environmental parameter condition point and the rated current carrying capacity is greater than the preset error, it indicates that the iterative calculation of the initial maximum allowable current carrying capacity has not converged or has not reached the convergence limit, resulting in insufficient accuracy in the calculation of the initial maximum allowable current carrying capacity. If the error between the initial maximum allowable current carrying capacity of the conductor at each environmental parameter condition point and the rated current carrying capacity is not greater than the preset error, it indicates that the iterative calculation of the initial maximum allowable current carrying capacity has met the preset accuracy requirements.

[0118] S2. Take the initial value of the maximum allowable current carrying capacity of the expansion conductor under the environmental parameter condition point as the new rated current carrying capacity of the expansion conductor, and return to step S2404.

[0119] It is understandable that, since the initial value of the maximum allowable current carrying capacity of the capacity-enhancing conductor under specific environmental parameter conditions is greater than the rated current carrying capacity than the preset error, it is necessary to continue to return to iterative calculation. Since the radiative heat dissipation power, convective heat dissipation power and solar heat absorption power per unit length of the capacity-enhancing conductor are the same under various environmental parameter conditions, it is only necessary to return to calculate the AC / DC resistance ratio and AC resistance per unit length related to the rated current carrying capacity.

[0120] S3. Determine the initial value of the maximum allowable current carrying capacity of the conductor under the environmental parameter condition point as the final initial value of the maximum allowable current carrying capacity under the environmental parameter condition point.

[0121] It is understandable that, since the initial value of the maximum allowable current carrying capacity of the conductor under specific environmental parameter conditions has an error value that is no greater than the preset error, the current initial value of the maximum allowable current carrying capacity can be determined as the final initial value of the maximum allowable current carrying capacity.

[0122] The method for obtaining the initial value of the allowable current carrying capacity of the conductor provided in this embodiment achieves higher accuracy by performing multiple iterative calculations on the initial value of the maximum allowable current carrying capacity.

[0123] The apparatus for obtaining the initial value of the allowable current of the capacity-enhancing conductor provided in the embodiments of this application will be described below. The apparatus for obtaining the initial value of the allowable current of the capacity-enhancing conductor described below can be referred to in correspondence with the method for obtaining the initial value of the allowable current of the capacity-enhancing conductor described above.

[0124] See Figure 3 , Figure 3 This is a schematic diagram of a device for obtaining the initial value of the allowable current carrying capacity of a conductor, as disclosed in an embodiment of this application.

[0125] like Figure 3 As shown, the device may include:

[0126] The environmental parameter acquisition unit 11 is used to acquire the environmental parameters of the target location where the capacity expansion conductor is located.

[0127] The environmental parameter point generation unit 12 is used to generate environmental parameter points for the capacity-enhancing conductor based on the environmental parameters.

[0128] The target environmental parameter point determination unit 13 is used to determine the environmental parameter condition point that is closest to the environmental parameter point in the pre-established set of environmental parameter allowable initial value points of the capacity-increasing conductor as the target environmental parameter point. The set of environmental parameter allowable initial value points includes several environmental parameter condition points and the initial value of the maximum allowable current carrying capacity corresponding to each environmental parameter condition point.

[0129] The allowable current carrying capacity initial value determination unit 14 is used to determine the maximum allowable current carrying capacity initial value corresponding to the target environmental parameter point as the allowable current carrying capacity initial value of the capacity-enhancing conductor.

[0130] Optionally, the device may also include:

[0131] An environmental parameter range set acquisition unit is used to acquire the physical parameters of the capacity-enhancing conductor and the environmental parameter range set of the target location, wherein the environmental parameter range set includes multiple environmental parameter variation ranges;

[0132] The grading unit is used to divide the environmental parameter according to the grading standard of each environmental parameter range and determine multiple grading parameter values ​​for the environmental parameter range.

[0133] The grade point determination unit is used to determine several environmental parameter condition points based on the parameter values ​​of each grade within each environmental parameter range.

[0134] The maximum allowable initial value calculation unit is used to calculate the maximum allowable current carrying capacity of the expansion conductor at each environmental parameter condition point based on the physical parameters of the expansion conductor at that environmental parameter condition point.

[0135] The initial value point set construction unit is used to summarize the initial value of the maximum allowable current carrying capacity of the capacity-enhancing conductor under various environmental parameter conditions, and obtain the initial value point set of the environmental parameter allowable current carrying capacity of the capacity-enhancing conductor.

[0136] Optionally, each of the environmental parameter condition points consists of ambient temperature, wind speed, and solar radiation intensity;

[0137] The maximum allowable initial load calculation unit includes:

[0138] The unit length radiative heat dissipation power calculation unit is used to calculate the unit length radiative heat dissipation power of the capacity-enhancing conductor at each environmental parameter condition point based on the ambient temperature at that environmental parameter condition point.

[0139] The convection heat dissipation power calculation unit is used to calculate the convection heat dissipation power of the capacity expansion conductor at each environmental parameter condition point based on the wind speed at that environmental parameter condition point.

[0140] The solar heat absorption power calculation unit is used to calculate the solar heat absorption power of the capacity-enhancing conductor at each environmental parameter condition point based on the solar intensity at that environmental parameter condition point.

[0141] An AC / DC resistance ratio calculation unit is used to calculate the AC / DC resistance ratio of the capacity-enhancing conductor based on the rated current carrying capacity of the capacity-enhancing conductor as an initial value and the physical parameters of the capacity-enhancing conductor.

[0142] A unit length AC resistance calculation unit is used to determine the unit length AC resistance of the capacity-enhancing wire based on the AC / DC resistance ratio and the maximum allowable temperature of the capacity-enhancing wire.

[0143] The maximum allowable initial value determination unit is used to determine the initial value of the maximum allowable current carrying capacity of the capacity-enhancing conductor at each environmental parameter condition point, based on the radiative heat dissipation power, convective heat dissipation power, and solar heat absorption power per unit length at the environmental parameter condition point, as well as the AC resistance per unit length at the environmental parameter condition point.

[0144] Optionally, the maximum allowable initial load determination unit includes:

[0145] The maximum allowable initial load value determination subunit is used to calculate the initial maximum allowable current carrying capacity of the increased conductor at each environmental parameter condition point using the following formula:

[0146]

[0147] Among them, I max W represents the initial value of the maximum allowable current carrying capacity of the expansion conductor under each environmental parameter condition point. R W represents the radiative heat dissipation power per unit length under the given environmental parameter conditions. F W represents the convective heat dissipation power at this environmental parameter point. S R represents the solar heat absorption power under this environmental parameter condition. AC The resistance per unit length is the AC resistance.

[0148] Optionally, the device may also include:

[0149] The error judgment unit is used to determine, for each environmental parameter condition point, after determining the initial value of the maximum allowable current carrying capacity of the capacity-enhancing conductor at the environmental parameter condition point based on the radiative heat dissipation power, convective heat dissipation power, solar heat absorption power per unit length, and the AC resistance per unit length at the environmental parameter condition point, whether the error value between the initial value of the maximum allowable current carrying capacity of the capacity-enhancing conductor at that environmental parameter condition point and the rated current carrying capacity is greater than a preset error. If yes, the rated current carrying capacity update unit is executed; if no, the final value determination unit is executed.

[0150] The rated current carrying capacity update unit is used to take the initial value of the maximum allowable current carrying capacity of the capacity-enhancing conductor under the environmental parameter condition point as the new rated current carrying capacity of the capacity-enhancing conductor, and return to execute the AC / DC resistance ratio calculation unit.

[0151] The final value determination unit is used to determine the initial value of the maximum allowable current carrying capacity of the capacity-enhancing conductor under the environmental parameter condition point as the final initial value of the maximum allowable current carrying capacity under the environmental parameter condition point.

[0152] The device for obtaining the initial value of the allowable current carrying capacity of the expansion conductor provided in this application embodiment can be applied to devices for obtaining the initial value of the allowable current carrying capacity of the expansion conductor, such as terminals like mobile phones and computers. Optionally, Figure 4 The hardware structure block diagram of the device for obtaining the initial value of the allowable current of the expansion conductor is shown. (Refer to...) Figure 4The hardware structure of the device for obtaining the initial value of the allowable current of the expansion conductor may include: at least one processor 1, at least one communication interface 2, at least one memory 3 and at least one communication bus 4.

[0153] In this embodiment of the application, the number of processor 1, communication interface 2, memory 3, and communication bus 4 is at least one, and processor 1, communication interface 2, and memory 3 communicate with each other through communication bus 4;

[0154] Processor 1 may be a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the present invention.

[0155] Memory 3 may include high-speed RAM, and may also include non-volatile memory, such as at least one disk storage device;

[0156] The memory stores a program, which the processor can call. The program is used for:

[0157] Obtain environmental parameters at the target location where the capacity-enhancing conductor is located;

[0158] Based on the environmental parameters, generate the environmental parameter points for the capacity-enhancing conductor;

[0159] In the pre-established set of initial environmental parameter load points for the capacity-increasing conductor, the environmental parameter condition point with the closest Euclidean distance to the environmental parameter point is determined as the target environmental parameter point. The set of initial environmental parameter load points includes several environmental parameter condition points and the initial maximum allowable current carrying capacity corresponding to each environmental parameter condition point.

[0160] The initial value of the maximum allowable current carrying capacity corresponding to the target environmental parameter point is determined as the initial value of the allowable current carrying capacity of the capacity-enhancing conductor.

[0161] Optionally, the refined and extended functions of the program can be found in the description above.

[0162] This application embodiment also provides a storage medium that can store a program suitable for execution by a processor, the program being used for:

[0163] Obtain environmental parameters at the target location where the capacity-enhancing conductor is located;

[0164] Based on the environmental parameters, generate the environmental parameter points for the capacity-enhancing conductor;

[0165] In the pre-established set of initial environmental parameter load points for the capacity-increasing conductor, the environmental parameter condition point with the closest Euclidean distance to the environmental parameter point is determined as the target environmental parameter point. The set of initial environmental parameter load points includes several environmental parameter condition points and the initial maximum allowable current carrying capacity corresponding to each environmental parameter condition point.

[0166] The initial value of the maximum allowable current carrying capacity corresponding to the target environmental parameter point is determined as the initial value of the allowable current carrying capacity of the capacity-enhancing conductor.

[0167] Optionally, the refined and extended functions of the program can be found in the description above.

[0168] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0169] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The various embodiments can be combined as needed, and the same or similar parts can be referred to each other.

[0170] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily 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 this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for obtaining the initial value of the allowable current carrying capacity of a capacity-enhancing conductor, characterized in that, include: Obtain environmental parameters at the target location where the capacity-enhancing conductor is located; Based on the environmental parameters, generate the environmental parameter points for the capacity-enhancing conductor; In the pre-established set of initial environmental parameter load points for the capacity-increasing conductor, the environmental parameter condition point with the closest Euclidean distance to the environmental parameter point is determined as the target environmental parameter point. The set of initial environmental parameter load points includes several environmental parameter condition points and the initial maximum allowable current carrying capacity corresponding to each environmental parameter condition point. The initial value of the maximum allowable current carrying capacity corresponding to the target environmental parameter point is determined as the initial value of the allowable current carrying capacity of the capacity-enhancing conductor. The process of constructing the initial value set of the environmental parameter load includes: Obtain the physical parameters of the capacity-enhancing conductor and the environmental parameter range set of the target location, wherein the environmental parameter range set includes multiple environmental parameter variation ranges; The environmental parameter is divided according to the classification standard of each environmental parameter range, and multiple parameter values ​​of the environmental parameter range are determined. Based on the parameter values ​​of each gear within each environmental parameter range, several environmental parameter condition points are determined. For each environmental parameter condition point, based on the physical parameters of the capacity-enhancing conductor, calculate the initial value of the maximum allowable current carrying capacity of the capacity-enhancing conductor under the environmental parameter condition point; By summarizing the initial values ​​of the maximum allowable current carrying capacity of the capacity-enhancing conductor under various environmental parameter conditions, the set of initial environmental parameter allowable current carrying capacity points of the capacity-enhancing conductor is obtained. Each of the aforementioned environmental parameter condition points consists of ambient temperature, wind speed, and solar radiation intensity; For each environmental parameter condition point, based on the physical parameters of the capacity-enhancing conductor, the initial value of the maximum allowable current-carrying capacity of the capacity-enhancing conductor under the environmental parameter condition point is calculated, including: Based on the ambient temperature at each environmental parameter condition point, calculate the radiative heat dissipation power per unit length of the capacity-enhancing conductor at that environmental parameter condition point. Calculate the convective heat dissipation power of the capacity-enhancing conductor at each environmental parameter condition point based on the wind speed at that environmental parameter condition point. Calculate the solar heat absorption power of the expansion conductor at each environmental parameter condition point based on the solar radiation intensity at that environmental parameter condition point. Using the rated current carrying capacity of the expansion conductor as an initial value, and based on the physical parameters of the expansion conductor, the AC / DC resistance ratio of the expansion conductor is calculated. Based on the AC / DC resistance ratio and the maximum allowable temperature of the capacitance-enhancing conductor, the AC resistance per unit length of the capacitance-enhancing conductor is determined. For each environmental parameter condition point, based on the radiative heat dissipation power, convective heat dissipation power, and solar heat absorption power per unit length at that environmental parameter condition point, as well as the AC resistance per unit length, the initial value of the maximum allowable current carrying capacity of the capacity-enhancing conductor at that environmental parameter condition point is determined.

2. The method according to claim 1, characterized in that, For each environmental parameter condition point, the initial value of the maximum allowable current carrying capacity of the capacity-enhancing conductor is determined based on the radiative heat dissipation power, convective heat dissipation power, and solar heat absorption power per unit length at that environmental parameter condition point, as well as the AC resistance per unit length. This includes: The initial value of the maximum allowable current carrying capacity of the enhanced conductor under each environmental parameter condition point is calculated using the following formula: in, This represents the initial value of the maximum allowable current carrying capacity of the enhanced conductor under each environmental parameter condition point. This refers to the radiative heat dissipation power per unit length under these environmental parameter conditions. This refers to the convective heat dissipation power under this environmental parameter condition. The solar heat absorption power under this environmental parameter condition point, The AC resistance per unit length is given.

3. The method according to claim 1 or 2, characterized in that, After determining the initial value of the maximum allowable current carrying capacity of the expansion conductor at each environmental parameter condition point based on the radiative heat dissipation power, convective heat dissipation power, and solar heat absorption power per unit length at that environmental parameter condition point, and the AC resistance per unit length, the method further includes: For each environmental parameter condition point, determine whether the error between the initial value of the maximum allowable current carrying capacity of the capacity-enhancing conductor at that environmental parameter condition point and the rated current carrying capacity is greater than a preset error; If so, the initial value of the maximum allowable current carrying capacity of the expansion conductor under the environmental parameter condition point is taken as the new rated current carrying capacity of the expansion conductor, and the process is returned to execute the step of using the rated current carrying capacity of the expansion conductor as the initial value and calculating the AC / DC resistance ratio of the expansion conductor based on the physical parameters of the expansion conductor. If not, then the initial value of the maximum allowable current carrying capacity of the increased conductor under the environmental parameter condition point shall be determined as the final initial value of the maximum allowable current carrying capacity under the environmental parameter condition point.

4. A device for obtaining the initial value of the allowable current carrying capacity of a capacity-enhancing conductor, characterized in that, The apparatus used in the method for obtaining the initial value of the allowable current carrying capacity of the conductor as described in claim 1 includes: The environmental parameter acquisition unit is used to acquire the environmental parameters of the target location where the capacity expansion conductor is located; An environmental parameter point generation unit is used to generate environmental parameter points for the capacity-enhancing conductor based on the environmental parameters. The target environmental parameter point determination unit is used to determine the environmental parameter condition point that is closest to the environmental parameter point in the pre-established set of initial environmental parameter load points of the capacity-increasing conductor as the target environmental parameter point. The set of initial environmental parameter load points includes several environmental parameter condition points and the initial maximum allowable current carrying capacity corresponding to each environmental parameter condition point. The initial allowable current carrying capacity determination unit is used to determine the initial maximum allowable current carrying capacity corresponding to the target environmental parameter point as the initial allowable current carrying capacity of the capacity-enhancing conductor.

5. The apparatus according to claim 4, characterized in that, Also includes: An environmental parameter range set acquisition unit is used to acquire the physical parameters of the capacity-enhancing conductor and the environmental parameter range set of the target location, wherein the environmental parameter range set includes multiple environmental parameter variation ranges; The grading unit is used to divide the environmental parameter according to the grading standard of each environmental parameter range and determine multiple grading parameter values ​​for the environmental parameter range. The grade point determination unit is used to determine several environmental parameter condition points based on the parameter values ​​of each grade within each environmental parameter range. The maximum allowable initial value calculation unit is used to calculate the maximum allowable current carrying capacity of the expansion conductor at each environmental parameter condition point based on the physical parameters of the expansion conductor at that environmental parameter condition point. The initial value point set construction unit is used to summarize the initial value of the maximum allowable current carrying capacity of the capacity-enhancing conductor under various environmental parameter conditions, and obtain the initial value point set of the environmental parameter allowable current carrying capacity of the capacity-enhancing conductor.

6. The apparatus according to claim 5, characterized in that, Each of the aforementioned environmental parameter condition points consists of ambient temperature, wind speed, and solar radiation intensity; The maximum allowable initial load calculation unit includes: The unit length radiative heat dissipation power calculation unit is used to calculate the unit length radiative heat dissipation power of the capacity-enhancing conductor at each environmental parameter condition point based on the ambient temperature at that environmental parameter condition point. The convection heat dissipation power calculation unit is used to calculate the convection heat dissipation power of the capacity expansion conductor at each environmental parameter condition point based on the wind speed at that environmental parameter condition point. The solar heat absorption power calculation unit is used to calculate the solar heat absorption power of the capacity-enhancing conductor at each environmental parameter condition point based on the solar intensity at that environmental parameter condition point. An AC / DC resistance ratio calculation unit is used to calculate the AC / DC resistance ratio of the capacity-enhancing conductor based on the rated current carrying capacity of the capacity-enhancing conductor as an initial value and the physical parameters of the capacity-enhancing conductor. A unit length AC resistance calculation unit is used to determine the unit length AC resistance of the capacity-enhancing wire based on the AC / DC resistance ratio and the maximum allowable temperature of the capacity-enhancing wire. The maximum allowable initial value determination unit is used to determine the initial value of the maximum allowable current carrying capacity of the capacity-enhancing conductor at each environmental parameter condition point, based on the radiative heat dissipation power, convective heat dissipation power, and solar heat absorption power per unit length at the environmental parameter condition point, as well as the AC resistance per unit length at the environmental parameter condition point.

7. The apparatus according to claim 6, characterized in that, The maximum allowable initial load determination unit includes: The maximum allowable initial load value determination subunit is used to calculate the initial maximum allowable current carrying capacity of the increased conductor at each environmental parameter condition point using the following formula: in, This represents the initial value of the maximum allowable current carrying capacity of the enhanced conductor under each environmental parameter condition point. This refers to the radiative heat dissipation power per unit length under these environmental parameter conditions. This refers to the convective heat dissipation power under this environmental parameter condition. The solar heat absorption power under this environmental parameter condition point, The AC resistance per unit length is given.

8. The apparatus according to claim 6 or 7, characterized in that, Also includes: The error judgment unit is used to determine, for each environmental parameter condition point, the initial value of the maximum allowable current carrying capacity of the capacity-enhancing conductor at the environmental parameter condition point, after determining the initial value of the maximum allowable current carrying capacity of the capacity-enhancing conductor at the environmental parameter condition point based on the radiative heat dissipation power, convective heat dissipation power, solar heat absorption power, and AC resistance per unit length at the environmental parameter condition point, whether the error value between the initial value of the maximum allowable current carrying capacity of the capacity-enhancing conductor at the environmental parameter condition point and the rated current carrying capacity is greater than a preset error. If yes, the rated current carrying capacity update unit is triggered to execute; if no, the final value determination unit is triggered to execute. The rated current carrying capacity update unit is used to take the initial value of the maximum allowable current carrying capacity of the capacity-enhancing conductor under the environmental parameter condition point as the new rated current carrying capacity of the capacity-enhancing conductor and return it to the AC / DC resistance ratio calculation unit. The final value determination unit is used to determine the initial value of the maximum allowable current carrying capacity of the capacity-enhancing conductor under the environmental parameter condition point as the final initial value of the maximum allowable current carrying capacity under the environmental parameter condition point.

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