Overhead line length calculation method based on intelligent line construction with precise line length deployment

Abstract

The present application provides a method for calculating the length of an overhead line based on intelligent line construction with precise line length deployment, obtaining the horizontal stress of the observation gear, calculating the axial stress of the conductor at the highest suspension point; calculating the change in the span of the current gear according to the preset horizontal stress of the current gear and the axial stress of the conductor; calculating the offset of the suspension insulator string of the current gear along the line direction according to the span change of the current gear; calculating the predicted horizontal stress of the next gear according to the offset of the current gear and the preset horizontal stress; repeating the above steps until the predicted horizontal stress and offset of each gear are calculated; when the offset of each gear is 0, determining the final horizontal stress of each gear; calculating the line length of each gear according to the final horizontal stress of each gear, calculating the total line length and the plastic elongation of the transmission line; obtaining the length of the overhead transmission line according to the total line length, the plastic elongation and the length of the tension insulator string. The line length calculation of this method is more accurate.

Description

Technical Field

[0001] The present application relates to the technical field of transmission line stringing construction, and in particular to a method for calculating the length of an overhead line based on intelligent stringing construction with precise line length deployment. Background Art

[0002] In the transmission line tension stringing construction, the elongation of the transmission line (i.e. steel core aluminum stranded wire or conductor) is related to the stringing time, stringing tension, stringing temperature, national standard steel core aluminum stranded wire model, etc. Traditional transmission line stringing construction must indirectly control the elongation of the conductor and the length of the line within the section through cumbersome sag observation to ensure the accuracy of the stringing.

[0003] Existing technologies such as prefabricated wire laying can pre-tension the conductors on site to release the elongation of the steel core aluminum stranded wire. When laying wires in large-span isolated sections, prefabricated wire laying can also avoid tedious sag observations, and the designed sag can be achieved after the wire laying is completed. However, the pre-tensioning site requires a large area, and the conductors must be off the ground to avoid wear, and the operation process is time-consuming and laborious; the line length measurement depends on the accuracy of instrument observation, and the setting of observation points on the total station tower is very inconvenient, and ground observers have to run around with the section when observing the length of the line in the section, especially in mountainous areas, where manual operation is very difficult. Prefabricated wire laying is not suitable for continuous multi-section laying, and cannot meet the needs of fast and efficient construction benefits; in the event of common weather changes such as fog and rain, it is difficult to complete observations, or even impossible to operate. Summary of the invention

[0004] In view of this, an embodiment of the present application provides a method, apparatus, terminal equipment and computer-readable storage medium for calculating the length of an overhead line based on intelligent wiring construction with precise line length deployment.

[0005] In a first aspect, an embodiment of the present application provides a method for calculating the length of an overhead line based on intelligent line construction with precise line length deployment, the method being applied to a power transmission line system, the power transmission line system comprising multiple tension towers arranged at intervals, a tension section being formed between two tension towers, and multiple tension sections forming a continuous file; the method comprising:

[0006] Obtaining the horizontal stress of the observation section in the continuous section, and calculating the axial stress of the conductor at the highest suspension point in the continuous section according to the horizontal stress of the observation section;

[0007] Record any tension section in the continuous section as the current section; obtain the preset horizontal stress of the current section;

[0008] Calculating the gear spacing change of the current gear according to the preset horizontal stress and the conductor axial stress;

[0009] Calculate the displacement of the suspension insulator string of the current gear along the line direction according to the gear span change of the current gear;

[0010] According to the offset of the suspension insulator string of the current stage along the line direction and the preset horizontal stress, and based on the moment balance equation of the suspension insulator string connected to the current stage and the adjacent next stage, the predicted horizontal stress of the next stage is calculated;

[0011] Calculate the span change of the next gear according to the predicted horizontal stress and the conductor axial stress, and calculate the offset of the suspension insulator string of the next gear along the line direction according to the offset of the suspension insulator string of the current gear along the line direction and the span change of the next gear;

[0012] The next gear is used to update the current gear, and the steps of calculating the predicted horizontal stress of the next gear, the span change of the next gear, and the offset of the suspension insulator string in the next gear along the line direction are repeatedly performed until the predicted horizontal stress of each gear in the continuous gear and the offset of the suspension insulator string along the line direction are calculated;

[0013] When the offset of each suspension insulator string along the line direction is 0, the final horizontal stress of each stage is determined according to the predicted horizontal stress of each stage;

[0014] The line length of each level is calculated according to the final horizontal stress of each level, and the total line length is calculated according to the line length of each level;

[0015] The plastic elongation of the transmission line is calculated based on the total line length and the elongation of the transmission line after horizontal stress stretching and relaxation.

[0016] The length of the overhead transmission line is obtained according to the sum of the line lengths, the plastic elongation and the sum of the lengths of the tension insulator strings of the tension towers in the continuous stages.

[0017] In a second aspect, an embodiment of the present application provides a device for determining the length of an overhead transmission line, the device being applied to a transmission line system, the transmission line system comprising multiple tension towers arranged at intervals, a tension section being formed between two tension towers, and multiple tension sections forming a continuous file; the device comprising:

[0018] A first horizontal stress acquisition module is used to acquire the horizontal stress of the observation file in the continuous file;

[0019] A conductor axial stress calculation module, used to calculate the conductor axial stress at the highest suspension point in the continuous gear according to the observed horizontal stress;

[0020] The second horizontal stress acquisition module is used to record any tension section in the continuous section as the current section; and obtain the preset horizontal stress of the current section;

[0021] A first gear pitch change calculation module, used to calculate the gear pitch change of the current gear according to the preset horizontal stress and the conductor axial stress;

[0022] A first offset calculation module, used to calculate the offset of the suspension insulator string of the current gear along the line direction according to the gear span change of the current gear;

[0023] A first horizontal stress calculation module is used to calculate the predicted horizontal stress of the next stage according to the offset of the suspension insulator string of the current stage along the line direction and the preset horizontal stress, and based on the moment balance equation of the suspension insulator string connected to the current stage and the adjacent next stage;

[0024] A second offset calculation module is used to calculate the span change of the next gear according to the predicted horizontal stress and the conductor axial stress, and calculate the offset of the suspension insulator string of the next gear along the line direction according to the offset of the suspension insulator string of the current gear along the line direction and the span change of the next gear;

[0025] A repetitive execution module is used to update the current gear by using the next gear, and repeatedly execute the steps of calculating the predicted horizontal stress of the next gear, the span change of the next gear, and the offset of the suspension insulator string in the next gear along the line direction, until the predicted horizontal stress of each gear in the continuous gear and the offset of the suspension insulator string along the line direction are calculated;

[0026] The final stress determination module is used to determine the final horizontal stress of each stage according to the predicted horizontal stress of each stage when the offset of the suspension insulator string of each stage along the line direction is 0;

[0027] A line length sum calculation module is used to calculate the line length of each level according to the final horizontal stress of each level, and to calculate the sum of the line lengths according to the line lengths of each level;

[0028] The plastic elongation calculation module is used to calculate the plastic elongation of the transmission line according to the total line length and the elongation of the transmission line after horizontal stress stretching and relaxation;

[0029] The transmission line length calculation module is used to obtain the overhead transmission line length according to the total line length, the plastic elongation and the length of the tension insulator string of the tension tower in the continuous stage.

[0030] In a third aspect, an embodiment of the present application provides a terminal device, comprising: a memory; one or more processors coupled to the memory; one or more applications, wherein the one or more applications are stored in the memory and configured to be executed by the one or more processors, and the one or more applications are configured to execute the overhead line length calculation method based on the intelligent line construction of precise line length deployment provided by the first aspect above.

[0031] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, in which program code is stored. The program code can be called by a processor to execute the overhead line length calculation method based on intelligent line construction based on precise line length deployment provided in the first aspect above.

[0032] The embodiment of the present application provides a method for calculating the length of overhead lines based on intelligent wiring construction with precise line length deployment, which takes into account factors such as the elastic modulus, temperature linear expansion coefficient, plastic creep elongation, tension insulator hardware string, and corner tower deflection of the steel-core aluminum stranded wire (i.e., transmission line), and uses the state equation to calculate the observation-level wiring stress of different working conditions. An accurate stress solution method using a wire-laying pulley is introduced to solve the wiring stress of each level, and then the wiring length is calculated. A sag line length mathematical model is proposed. During construction, the designed sag can be obtained after the line is hung by deploying the line length, making the line length calculation more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0034] Figure 1 A schematic diagram of an application scenario of a method for calculating the length of an overhead line based on intelligent wiring construction with precise line length deployment provided in an embodiment of the present application;

[0035] Figure 2 A flow chart of a method for calculating the length of an overhead line based on intelligent line construction with precise line length deployment provided by one embodiment of the present application;

[0036] Figure 3 A schematic diagram of the structure of a continuous file provided by an embodiment of the present application;

[0037] Figure 4 A structural diagram of an insulator string and a wire-laying pulley provided in one embodiment of the present application;

[0038] Figure 5A graph showing the relationship between the stress of an erection line and the change in line length provided for one embodiment of the present application;

[0039] Figure 6 A schematic diagram of the structure of a terminal device provided in one embodiment of the present application;

[0040] Figure 7 A schematic diagram of the structure of a computer-readable storage medium provided in one embodiment of the present application. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0042] In order to explain the present application in more detail, the following specifically describes, in conjunction with the accompanying drawings, a method, device, terminal equipment and computer-readable storage medium for calculating the length of an overhead line based on intelligent wiring construction with precise line length deployment provided by the present application.

[0043] Please refer to Figure 1 , Figure 1 A schematic diagram of an application scenario of an overhead line length calculation method based on intelligent stringing construction with precise line length deployment provided in an embodiment of the present application is shown. The application scenario includes a terminal device 100 provided in an embodiment of the present application. The terminal device 100 may be various electronic devices with a display screen (such as the structural diagrams of 102, 104, 106, and 108), including but not limited to smart phones and computer devices, wherein the computer device may be at least one of a desktop computer, a portable computer, a laptop computer, a tablet computer, and the like. The terminal device 100 may generally refer to one of a plurality of terminal devices, and this embodiment is only illustrated by the terminal device 100. Those skilled in the art may know that the number of the above-mentioned terminal devices may be more or less. For example, the above-mentioned terminal devices may be only a few, or the above-mentioned terminal devices may be dozens or hundreds, or more. The embodiment of the present application does not limit the number and type of the terminal devices. The terminal device 100 may be used to execute an overhead line length calculation method based on intelligent stringing construction with precise line length deployment provided in an embodiment of the present application.

[0044] In an optional implementation, the application scenario includes, in addition to the terminal device 100 provided in the embodiment of the present application, a server, wherein a network is provided between the server and the terminal device. The network is used to provide a medium for a communication link between the terminal device and the server. The network may include various connection types, such as wired, wireless communication links or optical fiber cables, etc.

[0045] It should be understood that the number of terminal devices, networks and servers is only schematic. Depending on the implementation needs, there can be any number of terminal devices, networks and servers. For example, the server can be a server cluster composed of multiple servers, etc. Among them, the terminal device interacts with the server through the network to receive or send messages, etc. The server can be a server that provides various services. Among them, the server can be used to execute the steps other than the visual display (such as aggregated data display) in a method for calculating the length of an overhead line based on intelligent wiring construction with precise line length deployment provided in an embodiment of the present application. In addition, when the terminal device executes a method for calculating the length of an overhead line based on intelligent wiring construction with precise line length deployment provided in an embodiment of the present application, part of the steps can be executed on the terminal device and part of the steps can be executed on the server, which is not limited here.

[0046] Based on this, an embodiment of the present application provides a method for calculating the length of an overhead line based on intelligent line construction with precise line length deployment. Figure 2 , Figure 2 The schematic diagram of the flow chart of a method for calculating the length of an overhead line based on intelligent line construction with accurate line length deployment provided by the embodiment of the present application is shown. Figure 1 The terminal device in the example is used to illustrate that the method is applied to a transmission line system, the transmission line system includes multiple tension towers arranged at intervals, a tension section is formed between two tension towers, and multiple tension sections form a continuous file, and the method includes the following steps:

[0047] Step S110, obtaining the horizontal stress of the observation file in the continuous file, and calculating the axial stress of the wire at the highest suspension point in the continuous file according to the horizontal stress of the observation file;

[0048] Specifically, line towers are mainly divided into straight towers and tension towers. Straight towers only bear vertical loads and horizontal loads caused by wind, while tension towers also bear longitudinal loads and angle loads. The tension section of an overhead line is a tension section between two tension towers, no matter how many straight towers there are in between. For example, please refer to Figure 3 As shown in the figure, the vertical lines 0, 1, i, ... n-1, n in the figure represent tension towers. Between 0-1, between 1-2, and between n-1 and n represent a tension section; all tension sections between 0-n form a continuous section. Each tension tower is provided with an insulator string; among them, the insulator strings on the 0th and nth tension towers are directly connected with conductors or transmission lines; and the insulator strings on the 1st, 2nd, i to n-1st tension towers are connected to the wire pulley (such as Figure 4 ), wherein the pay-out block is connected to the transmission line or conductor.

[0049] Among them, each tension section in the continuous section can be called a gear; one of the gears is called an observation gear.

[0050] In this embodiment, if Figure 5 As shown in the figure, the calculation of the length of overhead transmission lines mainly includes three parts: the compression elongation 0A0 of the steel core aluminum stranded wire (i.e., the transmission line or conductor), a small part of the plastic elongation A0J0 released during the tension stringing process, and the total plastic creep elongation J0E0 released after the line has been in operation for a long time. Figure 5 The horizontal axis represents the length of the transmission line; the vertical axis represents the stress on the transmission line. Since the compression elongation 0A0, a small part of the plastic elongation A0J0 released during the tension stringing process, and the entire plastic creep elongation J0E0 released after long-term operation of the line are all related to the stress on the transmission line, in this embodiment, the stress on each level of the transmission line must first be calculated.

[0051] First, the horizontal stress of the observation file in the continuous file is obtained. The horizontal stress of the observation file can be the stringing stress of the observation file, or the stringing stress under the file span (that is, the measured stringing stress value). One is a preset value for construction reference, and the other is a measured value, which is used to detect whether the construction is reasonable or accurate. The two values ​​have different meanings, but the values ​​are equal.

[0052] When the horizontal stress value of the observation span is the wire stress under the span, it can be calculated by the following formula: Where σ j To compensate for the stress of the wire after plastic creep elongation; σ m is the conductor stress under known conditions during the final operation; a D is the conductor load ratio under the wire-hanging condition; F is the elastic coefficient of the conductor during the final operation; α is the temperature linear expansion coefficient of the conductor; l is the span, which is the representative span for the continuous span tension section; t j is the air temperature under the wire-hanging condition; t is the air temperature under the known condition during the final operation period; λ m is the conductor load under known conditions during the final operation, and γ is the height difference angle. Among them, this formula is based on the total plastic creep elongation J0E0 released after long-term operation of the line, that is, the stress obtained after the initial elongation of the suspension conductor curve length is released for a long time.

[0053] After obtaining the horizontal stress of the observation gear, the axial stress of the conductor at the high suspension point of the observation gear is calculated by using the precise solution process of the stress of the continuous gear of the wire-laying pulley.

[0054] In one embodiment, the axial stress of the conductor at the highest suspension point in the continuous gear is calculated according to the observed horizontal stress, including: calculating the axial stress of the conductor by the following formula, wherein the formula is:

[0055]

[0056] Among them, σ k The axial stress of the wire at the observation height suspension point; g is the span of the observation range; λ is the load ratio of the transmission line; h g is the height difference of the suspension point of the observation file; γ g is the height difference angle of the suspension point of the observation gear, and H is the height difference between the high side suspension point of the observation gear and the highest suspension point of the continuous gear.

[0057] Step S120, record any tension section in the continuous section as the current section; obtain the preset horizontal stress of the current section;

[0058] Step S130, calculating the gear distance change of the current gear according to the preset horizontal stress and the conductor axial stress;

[0059] Specifically, when calculating σ k (i.e. observing the axial stress of the conductor at the high suspension point of the gear), it can be assumed that any tension section in the continuous gear (for example, it can be the i-th gear) is recorded as the current gear. In order to facilitate calculation, the current gear can usually start from the first gear or the revelation gear. The first gear or the revelation gear can set the tension section at the head end of the continuous gear. When the current gear is determined, the preset horizontal stress of the current gear is obtained. The preset horizontal stress is usually an assumed value. After obtaining the preset horizontal stress and the axial stress of the conductor, the gear spacing variable of the current gear can be calculated according to the following formula:

[0060]

[0061] Where: i is the horizontal stress of the i-th level in the tension section (i.e. the horizontal stress of the conductor). If it is the current level, it is the preset horizontal stress; l i is the i-th gear distance; Δl i is the gear distance variable of the i-th gear; h i is the height difference of the i-th level; γ i is the height difference angle of the i-th gear; h j It is the height difference between the jth gear and the kth gear, with positive and negative signs, and its sign is consistent with the sign of the height difference in the concept of vertical gear span.

[0062] By transforming this formula, the following formula can be obtained, where the gear distance change is calculated by the following formula:

[0063]

[0064] Among them, σ i is the horizontal stress of the i-th continuous section (i.e., the horizontal stress of the transmission line), σ i It is the preset horizontal stress or predicted horizontal stress; i is the i-th gear distance; Δl iis the gear distance variable of the i-th gear; h i is the height difference of the i-th level; γ i is the height difference angle of the i-th gear; h j is the height difference between the i-th gear and the j-th gear.

[0065] Step S140, calculating the offset of the suspension insulator string of the current gear along the line direction according to the span change of the current gear;

[0066] After the span change amount of the current gear is calculated, the span change amount of the current gear is used to calculate the offset amount of the suspension insulator string of the current gear along the line direction.

[0067] In one embodiment, the offset of the suspension insulator string along the line direction is calculated by the following formula:

[0068]

[0069] Among them, η i It is expressed as the offset of the suspension insulator string of the i-th stage in the continuous stage along the line direction.

[0070] Step S150, calculating the predicted horizontal stress of the next stage according to the offset of the suspension insulator string of the current stage along the line direction and the preset horizontal stress, and based on the moment balance equation of the suspension insulator string connected to the current stage and the next stage adjacent thereto;

[0071] In one embodiment, the predicted horizontal stress of the next level is calculated by the following formula:

[0072]

[0073] Among them, σ i+1 represents the predicted horizontal stress of the i+1th level, β i is the length of the suspension insulator string; A is the cross-sectional area of ​​the transmission line; F is the gravity of the wire pulley; G J is the weight of the suspension insulator string excluding the pulley; R is the radius of the pulley.

[0074] Specifically, Figure 4 As shown in the figure, the moment balance equation of the suspension point O is derived by using the straight suspension insulator string connecting the current stage and the next stage to obtain the predicted horizontal stress σ of the next stage. i+1 , where B i is the vertical load equivalent to the wire on the pulley shaft:

[0075]

[0076] Where: η i is the displacement of the suspension insulator string along the line direction; β iis the length of the suspension insulator string; A is the cross-sectional area of ​​the conductor; F is the gravity of the wire-laying pulley; G J is the weight of the suspension insulator string excluding the pulley; R is the radius of the pulley.

[0077] Among them, it can be derived from the concept of vertical span:

[0078]

[0079] Then, by transforming the above formula, we can get the predicted horizontal stress σ for the next level. i+1 The calculation formula of the next level is:

[0080]

[0081] Among them, σ i+1 represents the predicted horizontal stress of the i+1th level, β i is the length of the suspension insulator string; A is the cross-sectional area of ​​the transmission line; F is the gravity of the wire pulley; G J is the weight of the suspension insulator string excluding the pulley; R is the radius of the pulley.

[0082] Step S160, calculating the span change of the next gear according to the predicted horizontal stress and the conductor axial stress, and calculating the offset of the suspension insulator string of the next gear along the line direction according to the offset of the suspension insulator string of the current gear along the line direction and the span change of the next gear;

[0083] Step S170, using the next gear to update the current gear, and repeatedly executing the steps of calculating the predicted horizontal stress of the next gear, the span change of the next gear, and the offset of the suspension insulator string in the next gear along the line direction, until the predicted horizontal stress of each gear in the continuous gear and the offset of the suspension insulator string in the line direction are calculated;

[0084] Step S180, when the offset of each suspension insulator string along the line direction is 0, determining the final horizontal stress of each stage according to the predicted horizontal stress of each stage;

[0085] After obtaining the predicted horizontal stress of the next gear, the span change of the next gear, the offset of the suspension insulator string along the line direction, and the predicted horizontal stress of the next gear can be calculated by the following formulas according to the calculation formula of the span change, the calculation formula of the offset of the suspension insulator string along the line direction, and the predicted horizontal stress of the next gear. Repeating these steps, the predicted horizontal stress of each gear and the offset of the suspension insulator string along the line direction can be calculated.

[0086] When there are n tension sections, the span variable of the nth section can be calculated, and the offset of the suspension insulator string of each section along the line direction can be calculated, that is, Then let When it is 0 or infinitely close to 0, the predicted horizontal stress of each level can be determined to determine the final horizontal stress of each level.

[0087] It should be noted that when If it cannot be equal to 0 or is infinitely close to 0, it means that the preset horizontal stress may be inappropriate. At this time, it is necessary to readjust the preset horizontal stress and recalculate the predicted horizontal stress of each level and the offset of the suspension insulator string along the line direction based on the adjusted preset horizontal stress until is 0 or infinitely close to 0.

[0088] Step S190, calculating the line length of each level according to the final horizontal stress of each level, and calculating the total line length according to the line length of each level;

[0089] In one embodiment, calculating the line length of each gear includes: calculating the line length of each gear by the following formula:

[0090]

[0091] Among them, L i represents the line length of the i-th gear, σ* i represents the final horizontal stress of the i-th stage, λ i is the load ratio of the i-th transmission line; l i Indicates the gear distance of the i-th gear; h i is the i-th gear height difference of the i-th gear.

[0092] It should be noted that the line length of each level is the line length of each level taking into account the initial elongation ε0.

[0093] Step S1110, calculating the plastic elongation of the transmission line according to the total line length and the elongation of the transmission line after horizontal stress stretching and relaxation;

[0094] In one embodiment, the plastic elongation of the transmission line is calculated by the following formula:

[0095]

[0096] It represents the plastic elongation of the transmission line, and ε1 represents the elongation of the transmission line after horizontal stress stretching and relaxation.

[0097] Among them, the plastic elongation of the transmission line (usually steel core aluminum stranded wire) is calculated by using the compression elongation of the transmission line (usually steel core aluminum stranded wire) and a small part of the plastic elongation ε1 released during the tension stringing process. That is, a section of factory wire can be used to apply the stringing stress σ jThe elongation after tension and relaxation is ε1, then the compression elongation of the steel core aluminum stranded wire and a small part of the plastic elongation released during the tension stringing process is

[0098] Step S1120, obtaining the length of the overhead transmission line according to the total length of the line, the plastic elongation and the length of the tension insulator strings of the tension towers in the continuous stages.

[0099] Specifically, consider the line length ∑L of each level with initial elongation ε0 i , minus the compression elongation of the steel core aluminum stranded wire and a small part of the plastic elongation released during the tension stringing process and the tension insulator string of two tension towersδ i The length value is: L 连续档 represents the length of overhead transmission line, ∑δ i Represents the tension insulator string of two tension towers δ i The sum of the length values ​​of i Usually a measured value.

[0100] The embodiment of the present application provides a method for calculating the length of overhead lines based on intelligent wiring construction with precise line length deployment, which takes into account factors such as the elastic modulus of steel-core aluminum stranded wire, temperature linear expansion coefficient, plastic creep elongation, tension insulator hardware string, and corner tower deflection, and uses the state equation to calculate the observation-level wiring stress of different working conditions. An accurate stress solution method using a wire-laying pulley is introduced to solve the wiring stress of each level, and then the wiring length is calculated. A mathematical model for the sag line length is proposed. During construction, the line length is deployed and the designed sag can be obtained after hanging the line, making the line length calculation more accurate.

[0101] In addition, this method can accurately solve the stress of each overhead line under the design sag of the observation level, and then accurately calculate the length of each overhead line. It can better reflect the actual stress of each overhead line than using the average horizontal installation stress, thus ensuring the accuracy of the calculation results.

[0102] It should be understood that although Figure 2 The steps in the flowchart are shown in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Figure 2 At least part of the steps may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least part of the sub-steps or stages of other steps.

[0103] The above-mentioned embodiments disclosed in the present application describe in detail a method for calculating the length of an overhead line based on intelligent line construction with precise line length deployment. The above-mentioned method disclosed in the present application can be implemented using equipment in various forms. Therefore, the present application also discloses an overhead transmission line length determination device corresponding to the above-mentioned method. Specific embodiments are given below for detailed description.

[0104] The embodiment of the present application discloses a device for determining the length of an overhead transmission line, which is applied to a transmission line system. The transmission line system includes multiple tension towers arranged at intervals, a tension section is formed between two tension towers, and multiple tension sections form a continuous file; the device includes:

[0105] A first horizontal stress acquisition module is used to acquire the horizontal stress of the observation file in the continuous file;

[0106] Conductor axial stress calculation module, used to calculate the conductor axial stress at the highest suspension point in the continuous gear according to the observed horizontal stress;

[0107] The second horizontal stress acquisition module is used to record any tension section in the continuous section as the current section; and obtain the preset horizontal stress of the current section;

[0108] A first gear pitch change calculation module, used to calculate the gear pitch change of the current gear according to the preset horizontal stress and the conductor axial stress;

[0109] A first offset calculation module is used to calculate the offset of the suspension insulator string of the current gear along the line direction according to the gear span change of the current gear;

[0110] The first horizontal stress calculation module is used to calculate the predicted horizontal stress of the next stage according to the offset of the suspension insulator string of the current stage along the line direction and the preset horizontal stress, and based on the moment balance equation of the suspension insulator string connected to the current stage and the adjacent next stage;

[0111] The second offset calculation module is used to calculate the span change of the next gear according to the predicted horizontal stress and the conductor axial stress, and calculate the offset of the suspension insulator string of the next gear along the line direction according to the offset of the suspension insulator string of the current gear along the line direction and the span change of the next gear;

[0112] A repeated execution module is used to update the current gear by using the next gear, and repeatedly execute the steps of calculating the predicted horizontal stress of the next gear, the span change of the next gear, and the offset of the suspension insulator string in the next gear along the line direction, until the predicted horizontal stress of each gear in the continuous gear and the offset of the suspension insulator string along the line direction are calculated;

[0113] The final stress determination module is used to determine the final horizontal stress of each stage according to the predicted horizontal stress of each stage when the offset of the suspension insulator string of each stage along the line direction is 0;

[0114] A line length sum calculation module is used to calculate the line length of each level according to the final horizontal stress of each level, and to calculate the sum of the line lengths according to the line lengths of each level;

[0115] The plastic elongation calculation module is used to calculate the plastic elongation of the transmission line according to the total line length and the elongation of the transmission line after horizontal stress stretching and relaxation;

[0116] The transmission line length calculation module is used to obtain the length of the overhead transmission line according to the total line length, the plastic elongation and the length of the tension insulator string of the tension tower in the continuous section.

[0117] In one embodiment, the gear change is calculated by the following formula:

[0118]

[0119] Among them, σ i is the horizontal stress of the i-th level of the continuous segment, σ i It is the preset horizontal stress or predicted horizontal stress; i is the i-th gear distance; Δl i is the gear distance variable of the i-th gear; h i is the height difference of the i-th level; γ i is the height difference angle of the i-th gear; h j is the height difference between the i-th gear and the j-th gear.

[0120] In one embodiment, the offset of the suspension insulator string along the line direction is calculated by the following formula:

[0121]

[0122] Among them, η i It is expressed as the offset of the suspension insulator string of the i-th stage in the continuous stage along the line direction.

[0123] In one embodiment, the predicted horizontal stress of the next level is calculated by the following formula:

[0124]

[0125] Among them, σ i+1 represents the predicted horizontal stress of the i+1th level, β i is the length of the suspension insulator string; A is the cross-sectional area of ​​the transmission line; F is the gravity of the wire pulley; G J is the weight of the suspension insulator string excluding the pulley; R is the radius of the pulley.

[0126] In one embodiment, the conductor axial stress calculation module is used to calculate the conductor axial stress by the following formula:

[0127]

[0128] Among them, σ k The axial stress of the wire at the observation height suspension point; g is the span of the observation range; λ is the load ratio of the transmission line; h g is the height difference of the suspension point of the observation file; γ g is the height difference angle of the suspension point of the observation gear, and H is the height difference between the high side suspension point of the observation gear and the highest suspension point of the continuous gear.

[0129] In one embodiment, the first horizontal stress calculation module is used to calculate the line length of each level by the following formula:

[0130]

[0131] Among them, L i represents the line length of the i-th gear, σ* i represents the final horizontal stress of the i-th stage, λ i is the load ratio of the i-th transmission line; l i Indicates the gear distance of the i-th gear; h i is the i-th gear height difference of the i-th gear.

[0132] In one embodiment, the plastic elongation of the transmission line is calculated by the following formula:

[0133]

[0134] It represents the plastic elongation of the transmission line, and ε1 represents the elongation of the transmission line after horizontal stress stretching and relaxation.

[0135] For the specific definition of the device for determining the length of overhead transmission lines, please refer to the definition of the method above, which will not be repeated here. Each module in the above device can be implemented in whole or in part by software, hardware and a combination thereof. Each of the above modules can be embedded in or independent of the processor in the terminal device in the form of hardware, or can be stored in the memory of the terminal device in the form of software, so that the processor can call and execute the operations corresponding to each of the above modules.

[0136] Please refer to Figure 6 , Figure 6It shows a structural block diagram of a terminal device provided in an embodiment of the present application. The terminal device 60 may be a computer device. The terminal device 60 in the present application may include one or more of the following components: a processor 62, a memory 64, and one or more applications, wherein the one or more applications may be stored in the memory 64 and configured to be executed by one or more processors 62, and the one or more applications are configured to execute the method described in the above method embodiment applied to the terminal device, and may also be configured to execute the method described in the above method embodiment applied to the overhead line length calculation method for intelligent line construction based on accurate line length deployment.

[0137] The processor 62 may include one or more processing cores. The processor 62 uses various interfaces and lines to connect the various parts of the entire terminal device 60, and executes various functions and processes data of the terminal device 60 by running or executing instructions, programs, code sets or instruction sets stored in the memory 64, and calling data stored in the memory 64. Optionally, the processor 62 can be implemented in at least one hardware form of digital signal processing (DSP), field programmable gate array (FPGA), and programmable logic array (PLA). The processor 62 can integrate one or a combination of a central processing unit (CPU), a graphics processing unit (GPU), and a modem. Among them, the CPU mainly processes the operating system, user interface, and application programs; the GPU is responsible for rendering and drawing display content; and the modem is used to process wireless communications. It can be understood that the above-mentioned modem may not be integrated into the processor 62, but may be implemented separately through a communication chip.

[0138] The memory 64 may include a random access memory (RAM) or a read-only memory (ROM). The memory 64 may be used to store instructions, programs, codes, code sets or instruction sets. The memory 64 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for implementing at least one function (such as a touch function, a sound playback function, an image playback function, etc.), instructions for implementing the following various method embodiments, etc. The data storage area may also store data created by the terminal device 60 during use, etc.

[0139] Those skilled in the art will understand that Figure 6 The structure shown in the figure is only a block diagram of a partial structure related to the scheme of the present application, and does not constitute a limitation on the terminal device to which the scheme of the present application is applied. The specific terminal device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0140] In summary, the terminal device provided in the embodiment of the present application is used to implement the corresponding overhead line length calculation method based on intelligent line construction with precise line length deployment in the aforementioned method embodiment, and has the beneficial effects of the corresponding method embodiment, which will not be repeated here.

[0141] See also Figure 7 , which shows a block diagram of a computer-readable storage medium provided in an embodiment of the present application. The computer-readable storage medium 70 stores program code, which can be called by a processor to execute the method described in the above embodiment of the method for calculating the length of an overhead line based on the intelligent stringing construction of precise line length deployment, or can be called by a processor to execute the method described in the above embodiment of the method for calculating the length of an overhead line based on the intelligent stringing construction of precise line length deployment.

[0142] The computer readable storage medium 70 can be an electronic memory such as a flash memory, an EEPROM (electrically erasable programmable read-only memory), an EPROM, a hard disk, or a ROM. Optionally, the computer readable storage medium 70 includes a non-transitory computer-readable storage medium. The computer readable storage medium 70 has storage space for program code 72 that performs any method steps in the above method. These program codes can be read from or written to one or more computer program products. The program code 72 can be compressed, for example, in a suitable form.

[0143] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0144] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for calculating the length of an overhead line based on intelligent line construction with precise line length deployment, characterized in that: The method is applied to a power transmission line system, wherein the power transmission line system comprises multiple tension towers arranged at intervals, a tension section is formed between two tension towers, and multiple tension sections form a continuous section; the method comprises: Obtaining the horizontal stress of the observation section in the continuous section, and calculating the axial stress of the wire at the highest suspension point in the continuous section according to the horizontal stress of the observation section; Record any tension section in the continuous section as the current section; obtain the preset horizontal stress of the current section; Calculating the gear pitch change of the current gear according to the preset horizontal stress and the conductor axial stress; Calculate the displacement of the suspension insulator string of the current gear along the line direction according to the gear span change of the current gear; According to the offset of the suspension insulator string of the current stage along the line direction and the preset horizontal stress, and based on the moment balance equation of the suspension insulator string connected to the current stage and the adjacent next stage, the predicted horizontal stress of the next stage is calculated; Calculate the span change of the next gear according to the predicted horizontal stress and the conductor axial stress, and calculate the offset of the suspension insulator string of the next gear along the line direction according to the offset of the suspension insulator string of the current gear along the line direction and the span change of the next gear; The next gear is used to update the current gear, and the steps of calculating the predicted horizontal stress of the next gear, the span change of the next gear, and the offset of the suspension insulator string in the next gear along the line direction are repeatedly performed until the predicted horizontal stress of each gear in the continuous gear and the offset of the suspension insulator string along the line direction are calculated; When the offset of each suspension insulator string along the line direction is 0, the final horizontal stress of each stage is determined according to the predicted horizontal stress of each stage; The line length of each level is calculated according to the final horizontal stress of each level, and the total line length is calculated according to the line length of each level; The plastic elongation of the transmission line is calculated based on the total line length and the elongation of the transmission line after horizontal stress stretching and relaxation. Obtaining the length of the overhead transmission line according to the sum of the line lengths, the plastic elongation and the length of the tension insulator strings of the tension towers in the continuous section; The axial stress of the conductor is calculated by the following formula: Among them, σ k The axial stress of the wire at the observation height suspension point; g is the span of the observation range; λ is the load ratio of the transmission line; h g is the height difference of the suspension point of the observation file; γ g is the height difference angle of the suspension point of the observation file, H is the height difference between the high side suspension point of the observation file and the highest suspension point of the continuous file; σ j0 To compensate for the stress of the wire before plastic creep elongation; The gear pitch change is calculated by the following formula: Among them, σ i is the horizontal stress of the i-th level of the continuous segment. When the i-th level is the current level, σ i is the preset horizontal stress; i is the load ratio of the i-th transmission line; l i is the i-th gear distance; Δl i is the gear distance variable of the i-th gear; h i is the height difference of the i-th level; γ i is the height difference angle of the i-th gear; h j is the height difference between the i-th gear and the j-th gear; The offset of the suspension insulator string along the line direction is calculated by the following formula: Among them, η i It is expressed as the displacement of the suspension insulator string of the i-th gear in the continuous gear along the line direction; The predicted horizontal stress of the next level is calculated by the following formula: Among them, σ i+1 represents the predicted horizontal stress of the i+1th level, β i is the length of the suspension insulator string; A is the cross-sectional area of ​​the transmission line; F is the gravity of the wire pulley; G J is the weight of the suspension insulator string excluding the pulley; R is the radius of the pulley; The line length for each level is calculated using the following formula: Among them, L i represents the line length of the i-th level, σ * i represents the final horizontal stress of the i-th stage; The plastic elongation of the transmission line is calculated by the following formula: It represents the plastic elongation of the transmission line, and ε1 represents the elongation of the transmission line after horizontal stress stretching and relaxation.

2. A device for determining the length of an overhead transmission line, characterized in that: The device is applied to a power transmission line system, wherein the power transmission line system comprises multiple tension towers arranged at intervals, a tension section is formed between two tension towers, and multiple tension sections form a continuous section; the device comprises: A first horizontal stress acquisition module is used to acquire the horizontal stress of the observation file in the continuous file; A conductor axial stress calculation module, used to calculate the conductor axial stress of the highest suspension point in the continuous file according to the horizontal stress of the observation file; The second horizontal stress acquisition module is used to record any tension section in the continuous section as the current section; and obtain the preset horizontal stress of the current section; A first gear pitch change calculation module, used to calculate the gear pitch change of the current gear according to the preset horizontal stress and the conductor axial stress; A first offset calculation module, used to calculate the offset of the suspension insulator string of the current gear along the line direction according to the gear span change of the current gear; A first horizontal stress calculation module is used to calculate the predicted horizontal stress of the next stage according to the offset of the suspension insulator string of the current stage along the line direction and the preset horizontal stress, and based on the moment balance equation of the suspension insulator string connected to the current stage and the adjacent next stage; A second offset calculation module is used to calculate the span change of the next gear according to the predicted horizontal stress and the conductor axial stress, and calculate the offset of the suspension insulator string of the next gear along the line direction according to the offset of the suspension insulator string of the current gear along the line direction and the span change of the next gear; A repetitive execution module is used to update the current gear by using the next gear, and repeatedly execute the steps of calculating the predicted horizontal stress of the next gear, the span change of the next gear, and the offset of the suspension insulator string in the next gear along the line direction, until the predicted horizontal stress of each gear in the continuous gear and the offset of the suspension insulator string along the line direction are calculated; The final stress determination module is used to determine the final horizontal stress of each stage according to the predicted horizontal stress of each stage when the offset of the suspension insulator string of each stage along the line direction is 0; A line length sum calculation module is used to calculate the line length of each level according to the final horizontal stress of each level, and to calculate the sum of the line lengths according to the line lengths of each level; The plastic elongation calculation module is used to calculate the plastic elongation of the transmission line according to the total line length and the elongation of the transmission line after horizontal stress stretching and relaxation; A transmission line length calculation module, used to obtain the length of the overhead transmission line according to the total length of the line, the plastic elongation and the length of the tension insulator string of the tension tower in the continuous gear; The axial stress of the conductor is calculated by the following formula: Among them, σ k The axial stress of the wire at the observation height suspension point; g is the span of the observation range; λ is the load ratio of the transmission line; h g is the height difference of the suspension point of the observation file; γ g is the height difference angle of the suspension point of the observation file, H is the height difference between the high side suspension point of the observation file and the highest suspension point of the continuous file; σ j0 To compensate for the stress of the wire before plastic creep elongation; The gear pitch change is calculated by the following formula: Among them, σ i is the horizontal stress of the i-th level of the continuous segment. When the i-th level is the current level, σ i is the preset horizontal stress; i is the load ratio of the i-th transmission line; l i is the i-th gear distance; Δl i is the gear distance variable of the i-th gear; h i is the height difference of the i-th level; γ i is the height difference angle of the i-th gear; h j is the height difference between the i-th gear and the j-th gear; The offset of the suspension insulator string along the line direction is calculated by the following formula: Among them, η i It is expressed as the displacement of the suspension insulator string of the i-th gear in the continuous gear along the line direction; The predicted horizontal stress of the next level is calculated by the following formula: Among them, σ i+1 represents the predicted horizontal stress of the i+1th level, β i is the length of the suspension insulator string; A is the cross-sectional area of ​​the transmission line; F is the gravity of the wire pulley; G J is the weight of the suspension insulator string excluding the pulley; R is the radius of the pulley; The line length for each level is calculated using the following formula: Among them, L i represents the line length of the i-th level, σ * i represents the final horizontal stress of the i-th stage; The plastic elongation of the transmission line is calculated by the following formula: It represents the plastic elongation of the transmission line, and ε1 represents the elongation of the transmission line after horizontal stress stretching and relaxation.

3. A terminal device, characterized in that: include: Memory; One or more processors coupled to the memory; One or more applications, wherein the one or more applications are stored in a memory and configured to be executed by one or more processors, and the one or more applications are configured to execute the method according to claim 1.

4. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores program codes, which can be called by a processor to execute the method according to claim 1.

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