Aerial insulated cable conductor structure design method and system

Abstract

The invention belongs to the technical field of aerial insulated cables, and discloses an aerial insulated cable conductor structure design method and system, and the method comprises the steps: S1, calculating a conductor compression effective cross section through a conductor unit length resistance standard which is a low resistance requirement for an L3-type duralumin wire aerial insulated cable; s2, calculating the total cross section required by a single wire before the conductor is compressed according to the extension coefficient of the aluminum wire; s3, selecting the number of monofilaments of each layer of the conductor and calculating the filament diameter of the monofilaments according to the standard requirement and the regular stranding criterion of the stranded wire; s4, calculating the outer diameter of the conductor; s5, calculating the die size of each layer of the conductor; s6, calculating a control section range after the conductor is compressed; and S7, calculating the actual cross section of the compressed conductor. According to the method, through the structured calculation and verification process, the design process is converted from empirical estimation to accurate parameterization calculation, and the accuracy and controllability of conductor structure design are remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of overhead insulated cables, in particular to a design method and system for the conductor structure of overhead insulated cables. BACKGROUND

[0002] In recent years, with the increasing demand for low-loss and high-current capacity cables in power transmission networks, State Grid Corporation of China has put forward higher technical requirements for aluminum core overhead insulated cables using L3 hard aluminum wire standards in its centralized scale bidding and procurement. The conductor resistance performance of such cables needs to be significantly improved compared to the national standard, aiming to effectively reduce line loss, which poses new challenges to the structural design of cable conductors.

[0003] The existing conductor structure design method is usually step-by-step and experience-driven. Designers first preliminarily calculate the approximate cross-sectional area required for the conductor according to the resistance requirement, and then independently select the single wire specification, twisting structure and pressing mold based on production experience and existing process data. In this process, there is a lack of a systematic and internally related calculation chain between each design link. For example, the cross-sectional area change of the conductor material due to stress extension during the tight pressing and twisting process is usually estimated by a rough empirical coefficient, without accurately quantifying the relationship between the specific tight pressing process parameters.

[0004] The non-integration and over-reliance on experience of this design process result in the inability to accurately predict the actual cross-section and resistance value of the final product conductor during the design phase. The rationality of the design parameters often needs to be verified through actual trial production, and once there is a deviation, it must return to the design phase or repeatedly adjust the process parameters during the production process, which not only prolongs the development cycle and reduces production efficiency, but also leads to poor consistency in the electrical performance of the final product, making it difficult to meet the strict requirements of L3 hard aluminum wire overhead insulated cables for low resistance. SUMMARY

[0005] To overcome the above shortcomings, the present application provides a design method and system for the conductor structure of overhead insulated cables, aiming to improve the problem that the design process in the prior art relies heavily on experience, resulting in the inability to predict during the design phase, and poor accuracy and controllability of the electrical performance of the final product.

[0006] In a first aspect, the present application provides a design method for the conductor structure of overhead insulated cables, comprising:

[0007] S1: Calculate the tight pressing effective cross-section of the conductor by the conductor unit length resistance standard, the conductor unit length resistance standard is the low resistance requirement for L3 hard aluminum wire overhead insulated cables, and the tight pressing effective cross-section of the conductor is calculated according to the following formula:

[0008]

[0009] S 有效 S is the conductor tight-pressing effective cross-section; p is the conductor resistivity; L is the conductor length; and R is the conductor unit length resistance.

[0010] S2: calculating the total cross-section of the single wire before the conductor is tight-pressed according to the aluminum wire extension coefficient, wherein the total cross-section of the single wire before the conductor is tight-pressed S 前 is calculated according to the following formula:

[0011] S 前 = S 有效 × μ

[0012] wherein μ is the aluminum wire extension coefficient, and μ is the extension coefficient corresponding to the conductor of different specifications selected according to the aluminum wire tight-pressing coefficient and extension coefficient table;

[0013] S3: selecting the number of single wires of each layer of the conductor and calculating the single wire diameter according to the minimum number of single wires and the regular stranding criterion of the stranded wire;

[0014] S4: calculating the outer diameter of the conductor;

[0015] S5: calculating the mold size of each layer of the conductor;

[0016] S6: calculating the control cross-section range of the conductor after tight-pressing;

[0017] S7: calculating the actual cross-section of the conductor after tight-pressing;

[0018] S8: outputting the conductor structure process and ensuring that the actual cross-section of the conductor after tight-pressing calculated falls within the control cross-section range of the conductor after tight-pressing.

[0019] According to the above technical solution: a complete calculation chain from the preset conductor resistance standard to the output of the final process parameters is established, and a closed-loop verification mechanism is introduced in the design stage to ensure that the actual cross-section of the conductor calculated falls within the preset control range. In addition, the application introduces key parameters closely adapted to the material properties and tight-pressing process of L3 hard aluminum wire, such as the resistivity after tight-pressing and the aluminum wire extension coefficient, to accurately quantify the physical changes of the material in the processing process.

[0020] Preferably, the regular stranding criterion of the stranded wire in S3 includes selecting the number of single wires of each layer of the conductor according to the principle of the minimum tight-pressing factor and the maximum filling rate.

[0021] Preferably, the control cross-section of the conductor after tight-pressing in S6 is calculated according to the following formula:

[0022]

[0023] Wherein: S is the conductor control section, ρal is the minimum / maximum resistivity of L3 hard aluminum wire, k1 is the deformation coefficient, k2 is the measurement coefficient, k3 is the cabling coefficient, k4 is the safety margin, R is the unit length resistance of the conductor.

[0024] Preferably, the aluminum wire extension coefficient in S2 is in a corresponding relationship with the aluminum wire tight compression coefficient, and specifically includes:

[0025] When the aluminum wire tight compression coefficient is 0.84, the corresponding aluminum wire extension coefficient is 1.04;

[0026] When the aluminum wire tight compression coefficient is 0.85, the corresponding aluminum wire extension coefficient is 1.05.

[0027] Preferably, the average stranding coefficient in S7 is calculated according to the following formula:

[0028]

[0029] Wherein, n i represents the number of single wires of the conductor center layer, the first layer to the n layer; k i represents the stranding coefficient of the conductor center layer, the first layer to the n layer; and the k i is the verified conservative data.

[0030] Preferably, after S8, further comprising:

[0031] Actual production verification is carried out;

[0032] According to the corresponding relationship between the actual measured resistance of the conductor and the weighing section measured in the actual production verification, feedback control is carried out.

[0033] Preferably, the feedback control specifically adjusts at least one of the conductor resistivity, the tight compression coefficient of each layer, and the pitch diameter ratio when the corresponding relationship between the actual measured resistance of the conductor and the weighing section deviates from the preset target.

[0034] Preferably, the tight compression coefficient of the different specifications of conductors selected according to S2 in S4 is calculated according to the following formula:

[0035]

[0036] Wherein, D is the outer diameter of the conductor, S 有效 is the tight compression effective section of the conductor, and η is the tight compression coefficient.

[0037] Preferably, when calculating the mold size of each layer of the conductor in S5, the tight compression coefficient of each layer of the multi-layer stranded structure conductor is determined according to the conductor material properties, the number of stranding layers, and the production equipment accuracy, and the stranding gap and tight compression deformation of each layer of single wire are considered, so as to calculate the mold size of each layer of the conductor. The calculation formula is:

[0038]

[0039] wherein, D i is the mold size of each layer, d is the filament diameter, n i is the total number of filaments of each layer, μ i is the extension coefficient of each layer, η i is the compaction coefficient of each layer.

[0040] In a second aspect, the present application provides the following technical solutions, an overhead insulated cable conductor structure design system, the system comprises:

[0041] a calculation module for performing calculation;

[0042] the calculation module comprises:

[0043] an effective cross-section calculation unit for calculating the conductor compaction effective cross-section according to the preset conductor unit length resistance standard;

[0044] a total cross-section calculation unit for calculating the total cross-section required by the filaments before conductor compaction according to the aluminum wire extension coefficient corresponding to the conductor compaction coefficient;

[0045] a filament diameter determination unit for selecting the number of filaments of each layer of the conductor according to the normal stranding criterion of the stranded wire, and calculating the filament diameter in combination with the total cross-section required by the filaments before conductor compaction;

[0046] a conductor outer diameter calculation unit for calculating the conductor outer diameter based on the filament diameter and the number of filaments of each layer;

[0047] a mold size design unit for designing the mold size of each layer of the conductor adapted to the material characteristics of the L3 type hard aluminum wire according to the conductor outer diameter and the normal stranding criterion of the stranded wire;

[0048] a control cross-section range determination unit for determining the control cross-section range after conductor compaction;

[0049] an actual cross-section calculation unit for calculating the actual cross-section after conductor compaction through the conductor compaction effective cross-section and the average stranding coefficient;

[0050] an output module for outputting the conductor structure process parameters and ensuring that the actual cross-section after conductor compaction calculated by the actual cross-section calculation unit is within the control cross-section range after conductor compaction determined by the control cross-section range determination unit.

[0051] The present application has the following beneficial effects:

[0052] 1、The present application forms a closed-loop verification in the design stage by establishing a complete calculation chain starting from the conductor unit length resistance standard, sequentially calculating the conductor tight compression effective cross section, considering the tight compression before the total cross section of the single wire considering the aluminum wire extension coefficient, and finally ensuring that the actual cross section calculated is within the control cross section range. This structured calculation and verification process changes the design process from relying on empirical estimation to precise parameterized calculation, significantly improving the accuracy and controllability of the conductor structure design.

[0053] 2、The present application enhances the adaptability of the design scheme to specific materials and processes by introducing key parameters closely related to the material properties and tight compression process of L3 hard aluminum wire. Specifically, the method uses the calibrated L3 hard aluminum wire tight compression conductor resistivity, and introduces the aluminum wire extension coefficient corresponding to the conductor tight compression coefficient, so that the design scheme can quantitatively and compensate for the cross section change of the conductor due to material deformation in the actual tight compression process, so that the design result is closer to the actual production.

[0054] 3、The present application improves the stability and consistency of the electrical performance of the conductor produced finally by setting the final verification step and the optional feedback control mechanism. The step of ensuring that the actual cross section falls within the control cross section in the design process ensures the feasibility of the design scheme from the source, reducing the deviation between design and production. In addition, by introducing a feedback control link based on the actual production of measured resistance and weighing cross section, the core parameters such as conductor resistivity and tight compression coefficient can be continuously calibrated, so that the design system is continuously optimized, ensuring the stability of the conductor resistance performance in batch production. BRIEF DESCRIPTION OF DRAWINGS

[0055] Figure 1 Method flowchart of a conductor structure design method for an overhead insulated cable of the present embodiment;

[0056] Figure 2 System architecture diagram of a conductor structure design system of the present embodiment. DETAILED DESCRIPTION

[0057] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the scope of protection of the present application.

[0058] Embodiment one

[0059] In the first embodiment of the present application, the present application provides a low-loss overhead insulated cable conductor structure process design method, taking 50-240mm2 conductors as an example, the method comprises:

[0060] Step 1: Calculate the conductor tight effective cross section by the conductor unit length resistance standard;

[0061]

[0062] Wherein: S effective is the conductor tight effective cross section, mm 2 ; p is the conductor resistivity; L is the conductor length, m; R is the conductor unit length resistance, Ω / km.

[0063] The aluminum monofilament resistivity standard used by the conventional aluminum conductor is 0.028264Ω·mm 2 / m, after tight twisting, the conductor resistivity is 0.0288Ω·mm 2 / m; the resistivity standard of L3 type hard aluminum wire is 0.027586Ω·mm 2 / m, after conversion, the conductor resistivity p of L3 type hard aluminum wire after tight pressing is 0.0281Ω·mm 2 / m.

[0064] According to the low-loss overhead insulated cable conductor unit length resistance R standard, the effective cross section S effective of each specification is calculated:

[0065]

[0066] Step 2: Determine the tight pressing coefficient and extension coefficient selected by the conductor of different specifications, and calculate the total cross section S required by the monofilament before the conductor is tight pressed 前 .

[0067] S 前 =S 有效 ×μ

[0068] Wherein: μ is the aluminum wire extension coefficient.

[0069] Aluminum wire tight pressing coefficient and extension coefficient table

[0070] Serial number Compactness coefficient η Extension coefficient μ 1 0.84 1.04 2 0.85 1.05 3 0.86 1.06 4 0.87 1.07 5 0.88 1.08 6 0.89 1.09

[0071] The tight pressing coefficient selected by the conductor of different specifications requires: 120mm2 and below: 0.86, 150mm2, 185mm2: 0.87, 240mm 2 and above: 0.88.

[0072] The tight pressing coefficient value of each specification conductor is shown in the following table:

[0073]

[0074] Calculate the total cross section S required for each specification of conductor before compaction 前 :

[0075]

[0076]

[0077] Step 3: Determine the conductor structure (select the number of filaments) and calculate the filament diameter;

[0078] In general, the selection of the number of filaments needs to meet the stability of the conductor structure and the feasibility of the processing technology, while avoiding the increase in production complexity caused by too many filaments or the lack of conductor flexibility caused by too few filaments. For example, for small cross-section conductors, a smaller number of filaments can be selected to simplify the production process; while for large cross-section conductors, the number of filaments needs to be appropriately increased to improve the overall flexibility and bending resistance of the conductor. Table 2 of the national standard GB / T 3956-2008 clearly specifies the minimum number of single wires for different specifications of compacted round conductors; at the same time, the number of filaments and the conductor structure arrangement are determined according to the rules of regular stranding of the wire.

[0079] Under the premise of confirming the number of conductor filaments n, the filament diameter d can be calculated:

[0080]

[0081] Where d is the filament diameter, mm; n is the number of conductor filaments.

[0082] According to the above principle, the number of filaments is valued and the filament diameter d of each specification of conductor is calculated, the results are shown in the table below.

[0083]

[0084]

[0085] Step 4: Calculate the conductor outer diameter

[0086] According to the compacting coefficient of the different specifications of conductors selected in step 2, the conductor outer diameter D is calculated.

[0087]

[0088] Where S effective is the effective cross section of the conductor, mm2, and η is the compacting coefficient.

[0089]

[0090]

[0091] Step 5: Calculate the conductor layer mold size;

[0092] In order to prevent the outer layer monofilament from loosening, bulging, lanterning and other phenomena during production, the tight pressing coefficient of the inner layer of the conductor should be smaller than that of the outer layer. The specific value should be determined according to the conductor material properties, the number of stranding layers and the production equipment precision and other factors. The stranding gap and tight pressing deformation of each layer of monofilament should be considered; each layer of monofilament should be tightly attached to the inner layer without obvious stress concentration, and finally the mold size is verified and corrected through trial production to ensure that the cross section of the conductor after tight pressing is uniform and the roundness meets the design requirements. The mold size of each layer of the conductor is calculated according to the tight pressing coefficient of each layer of the multi-layer stranding structure conductor determined according to the above rules.

[0093]

[0094] Di: mold size of each layer; d: monofilament diameter; ni: total number of monofilaments in each layer; μi: extension coefficient of each layer; ηi: tight pressing coefficient of each layer;

[0095] The tight pressing coefficient of each layer is determined according to the above principles as follows:

[0096]

[0097]

[0098] The mold size of each layer of the conductor is calculated as follows:

[0099]

[0100] Step 6: Calculate the control cross section range of the conductor after tight pressing

[0101] The high-conductivity electrical round aluminum rod used for L3 hard aluminum wire has a resistivity of not more than 0.02734 Ω·mm 2 / m. According to the material properties of aluminum, the resistivity increases by a small amount during cold working deformation. When the compression ratio reaches 95%-98%, the resistivity of aluminum increases by about 0.9%.

[0102] Through a large amount of data verification, when the 9.5 mm aluminum rod is used to draw monofilament, the minimum increase of resistivity is 0.2%, that is, the minimum resistivity of L3 hard aluminum wire is 0.027395 Ω·mm 2 / m, and the standard resistivity of L3 hard aluminum wire 0.027586 Ω·mm 2 / m is taken as the maximum resistivity. In the production process, the control cross section range of the conductor after tight pressing is taken as the control index.

[0103]

[0104] In the formula, S is the control cross section of the conductor, mm 2, pAl is the minimum / maximum resistivity of L3 type hard aluminum wire, k1: deformation coefficient, take 1.02, k2: measurement coefficient, take 1.01, k3: cabling coefficient, take 1.0032, k4: safety margin, take 1.005, R is the resistance per unit length of the conductor, Ω / km.

[0105] The control section range of each specification is calculated as follows:

[0106]

[0107] Step 7: Calculate the actual section of the conductor after compression

[0108] The actual section of the conductor after compression is calculated, which aims to determine the pitch ratio of each layer of the conductor.

[0109] Through the pitch ratio of each layer, the lay-in coefficient of the corresponding layer can be calculated, and then the average lay-in coefficient of the conductor is calculated. The larger the average lay-in coefficient, the larger the actual section of the conductor.

[0110] Therefore, during the process design, it is necessary to adjust the average lay-in coefficient by reasonably setting the pitch ratio of each layer, so as to realize the accurate control of the actual section of the conductor.

[0111] In specific operation, first, according to the control section range determined in step 6, combined with the arrangement mode of aluminum wires of different layers and the lay parameters, the pitch ratio value of each layer is set respectively, and the average lay-in coefficient of the conductor is obtained.

[0112] Subsequently, the average lay-in coefficient is substituted into the actual section calculation formula, and compared and verified with the control section range. If the calculation result exceeds the range, the pitch ratio parameter of the corresponding layer needs to be adjusted again until the actual section meets the design requirements. In this way, not only can the conductor have a lower resistance, but also the stability of the lay structure and the feasibility of the production process can be ensured.

[0113] Lay-in coefficient:

[0114] Wherein, ki: lay-in coefficient of each layer, mi: pitch ratio of each layer;

[0115] Average lay-in coefficient:

[0116] n0, n1, n2, …, nn—number of single wires of the center layer, the first layer, the second layer, …, the n layer

[0117] k0, k1, k2, …, kn—lay-in coefficient of the center layer, the first layer, the second layer, …, the n layer

[0118] Actual section of the conductor: Sactual = Seffective * km;

[0119] The preferred conductor section ratio is as follows:

[0120] Number of layers Third layer Second layer First layer 1 17-19 2 21-24 14-16 3 23-26 17-20 13-15

[0121] The calculated conductor actual section is within the conductor control section calculated in step 6, and the section ratio can be used to compile the process for production.

[0122] The calculated conductor actual section is within the conductor control section calculated in step 6, and the section ratio can be used to compile the process for production.

[0123] Step 8: The conductor structure process is shown in the following table:

[0124]

[0125] The actual production test data is shown in the following table:

[0126]

[0127] Example two:

[0128] A cable production enterprise received an order to produce a batch of JKLYJ-10kV 1x240 L3 type hard aluminum overhead insulated cable. The order is based on the latest technical specification of State Grid, which requires that the unit length DC resistance (R) of the cable conductor at 20℃ should not be higher than 0.1195Ω / km.

[0129] After the enterprise used the traditional and experience-based design method for trial production, it was found that the product qualified rate was unstable: the resistance value of the cable conductor of some batches exceeded the upper limit of 0.1195Ω / km, resulting in product scrap; in order to ensure qualification, some batches excessively increased the conductor section, causing waste of L3 type hard aluminum wire material. The root cause is that the traditional method cannot accurately predict and control the electrical performance of the final product conductor in the design stage.

[0130] To solve the above problems, a kind of overhead insulated cable conductor structure design system is adopted, and its structure is as shown in Figure 2 The specific implementation process of the system is as follows:

[0131] After receiving the design target (R=0.1195Ω / km), the system starts to perform calculation.

[0132] Firstly, the system calculates the conductor tight pressure effective section S 2 required to meet the resistance standard according to the internal storage of L3 type hard aluminum wire tight pressure conductor resistivity (ρ=0.0281Ω·mm 有效 / m) as 235.15mm 2 .

[0133] Then, the system queries the corresponding aluminum wire extension coefficient (μ = 1.05) from the internal reference table according to the conductor tight pressing coefficient (η = 0.85) set by the production process, and calculates the total cross section S required by the single wire before the conductor is tightly pressed 前 246.91mm 2 .

[0134] Subsequently, the system queries the corresponding aluminum wire extension coefficient (μ = 1.05) from the internal reference table according to the conductor tight pressing coefficient (η = 0.85) set by the production process, and calculates the total cross section S required by the single wire before the conductor is tightly pressed 2 37 single wire twisted structure of the nominal cross section cable standard, determines the single wire diameter to be 2.91mm, and calculates the conductor outer diameter to be 20.37mm, and further designs the mold size suitable for each twisted layer.

[0135] At the same time, the system sets a conductor tight pressing after control cross section range, for example [239.00mm 2 , 242.00mm 2 ], for production inspection according to the quality control requirements.

[0136] Finally, the system calculates the average twist-in coefficient k m 1.018 according to the internal stored and verified twist-in coefficient data of each layer, and thereby calculates the actual cross section S 实际 239.38mm 2 after the conductor is tightly pressed.

[0137] The system performs final verification before output, confirms that the actual cross section (239.38mm 2 ) calculated is within the preset control cross section range ([239.00mm 2 , 242.00mm 2 ]). After verification, the system outputs the complete conductor structure process parameters including the single wire diameter (2.91mm), the mold size of each layer and the pitch ratio as the production instructions for this batch of cable.

[0138] Through the above application, the enterprise obtains a set of accurate and closed-loop verified design parameters before production, solving the problem of unstable finished product resistance caused by inaccurate design.

[0139] Finally, it should be noted that the above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features, as long as they are within the spirit and principles of the present application. Any modification, equivalent replacement, improvement, etc. made shall be included in the protection scope of the present application.

Claims

1. A method of designing an overhead insulated cable conductor structure, characterized by, The method comprises: S1: calculating a conductor compact effective cross section according to a conductor unit length resistance standard, the conductor unit length resistance standard being a low resistance requirement for an L3 type hard aluminum overhead insulated cable, the conductor compact effective cross section being calculated according to the following formula: where S 有效 is the conductor tight effective cross section; p is the conductor resistivity; L is the conductor length; R is the conductor resistance per unit length; S2: Calculate the total cross-section of the conductor before compaction required for the single wire, S 前 According to the following formula: S 前 = S 有效 x μ Wherein, μ is an aluminum wire extension coefficient; S3: selecting the number of single wires of each layer of the conductor according to a set minimum single wire number and a normal stranding criterion of the stranding line, and calculating the single wire diameter; S4: calculating the conductor outer diameter; S5: calculating the mold size of each layer of the conductor; S6: calculating the conductor compact control cross section range; S7: Calculate the conductor actual cross section after compression, the conductor actual cross section after compression S 实际 According to the following formula: S 实际 = S 有效 x k m wherein k m is the average lay-in factor, said k m is related to the number of single wires of the conductor central layer, the first layer to the n-th layer and the lay-in factor of each layer; S8: outputting the conductor structure process, and ensuring that the actual cross section of the conductor after compacting is within the conductor compact control cross section range.

2. A method of designing an overhead insulated cable conductor structure according to claim 1, characterized in that The normal stranding criterion in S3 comprises selecting the number of single wires of each layer of the conductor according to the principle of the minimum compacting factor and the maximum filling rate.

3. The overhead insulated cable conductor construction design method of claim 1, wherein, The conductor compact control cross section in S6 is calculated according to the following formula: Wherein, S is the conductor control cross section, ρal is the minimum / maximum resistivity of the L3 type hard aluminum wire, k1 is a deformation coefficient, k2 is a measurement coefficient, k3 is a cabling coefficient, k4 is a safety margin, and R is the conductor unit length resistance.

4. The overhead insulated cable conductor construction design method of claim 1, wherein, The aluminum wire extension coefficient in S2 is in a corresponding relationship with the aluminum wire compacting coefficient, and specifically comprises: When the aluminum wire compacting coefficient is 0.84, the corresponding aluminum wire extension coefficient is 1.04; When the aluminum wire compacting coefficient is 0.85, the corresponding aluminum wire extension coefficient is 1.

05.

5. The overhead insulated cable conductor construction design method of claim 1, wherein, The average stranding-in coefficient in S7 is calculated according to the following formula: wherein n i represents the number of single wires of the conductor central layer, the first layer to the n-th layer; k i represents the lay-in coefficient of the conductor central layer, the first layer to the n-th layer; k i is the verified conservative data.

6. The overhead insulated cable conductor construction design method of claim 1, wherein, After S8, further comprising: Carrying out actual production verification; According to the corresponding relationship between the actual measured resistance of the conductor and the weighing cross section in the actual production verification, feedback regulation is carried out.

7. A method of designing an overhead insulated cable conductor structure according to claim 6, wherein, The feedback regulation specifically comprises: when the corresponding relationship between the actual measured resistance of the conductor and the weighing cross section deviates from the preset target, at least one of the conductor resistivity, the compacting coefficient of each layer, and the pitch diameter ratio is adjusted.

8. The overhead power cable conductor construction design method of claim 1 wherein, The compacting coefficient of the conductor of different specifications selected according to S2 in S4 is calculated according to the following formula: Where D is the outer diameter of the conductor, S 有效 is the effective cross section of the conductor under compression, and η is the compression factor.

9. The overhead power cable conductor construction design method of claim 1 wherein, When calculating the mold size of each layer of the conductor in S5, the compacting coefficient of each layer of the multi-layer stranding structure conductor is determined according to the conductor material properties, the stranding layer number, and the production equipment accuracy, and the stranding gap and compacting deformation of each layer of single wire are considered, so as to calculate the mold size of each layer of the conductor, and the calculation formula is: wherein D i is the mold size of each layer, d is the filament diameter, n i is the total number of filaments per layer, μ i is the extension coefficient of each layer, η i is the compaction coefficient of each layer.

10. An overhead insulated electrical cable conductor construction design system characterized by, The system for the method for designing a conductor structure of an overhead insulated cable according to any one of claims 1-9, the system comprising: a calculation module for performing calculation; The calculation module comprises: an effective cross section calculation unit for calculating a conductor compact effective cross section according to a preset conductor unit length resistance standard; a single wire total cross section calculation unit for calculating a single wire required total cross section before compacting of the conductor according to an aluminum wire extension coefficient corresponding to a conductor compacting coefficient; a single wire diameter determination unit for selecting the number of single wires of each layer of the conductor according to a normal stranding criterion of the stranding line, and calculating a single wire diameter in combination with the single wire required total cross section before compacting of the conductor; a conductor outer diameter calculation unit for calculating a conductor outer diameter based on the single wire diameter and the number of single wires of each layer; a conductor outer diameter calculation unit for calculating a conductor outer diameter based on the single wire diameter and the number of single wires of each layer; A mold size design unit is configured to design mold sizes of each layer of the conductor according to the conductor outer diameter and the normal stranding criterion of the stranding, and to adapt to the material characteristics of the L3 hard aluminum wire; A control cross-section range determination unit is configured to determine a control cross-section range of the conductor after being tightly pressed; An actual cross-section calculation unit is configured to calculate the actual cross-section of the conductor after being tightly pressed by using the effective cross-section of the conductor after being tightly pressed and the average stranding coefficient; An output module is configured to output the process parameters of the conductor structure, and to ensure that the actual cross-section of the conductor after being tightly pressed calculated by the actual cross-section calculation unit is within the control cross-section range of the conductor after being tightly pressed determined by the control cross-section range determination unit.

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