Method and system for limiting windage of a conductor for tension stringing

Abstract

The application provides a conductor wind deviation limiting method and system applied to tension stringing, and the method is specifically as follows: a wind deviation limiting position is screened based on a planned path of tension stringing, and a corresponding insulating arc limiting ring is set; the conductor to be strung is strung along the planned path with the penetration of the arc ring as a stringing constraint condition; the wind deviation of the corresponding wind deviation limiting position penetrated by the conductor to be strung is monitored, corresponding wind data and a reference distance between the conductor to be strung and an adjacent live line are collected; the maximum wind deviation position of the conductor to be strung is predicted based on the wind data and the current tension of the conductor to be strung; the minimum safety distance between the conductor to be strung and the adjacent live line is calculated based on the maximum wind deviation position of the conductor to be strung and the reference distance, and the insulating arc limiting ring is moved and adjusted in combination with a preset safety distance threshold. The application actively physically limits the conductor to be strung by setting the arc ring, and moves and adjusts the position of the arc ring in combination with the maximum wind deviation position prediction, so that the reliability of wind deviation suppression is ensured.

Description

Technical Field

[0001] This invention relates to the field of tension wire laying technology, and in particular to a method and system for limiting conductor wind deflection applied to tension wire laying. Background Technology

[0002] In high-voltage transmission line tensioning operations, newly constructed conductors are typically laid parallel to or cross adjacent operational lines at close range. However, in field conditions, the conductors are continuously subjected to pulsating wind loads, making them highly susceptible to lateral wind-induced swaying. Because the conductors are in a dynamic laying state, their operating tension fluctuates in real time, resulting in wind-induced swaying amplitudes far exceeding the design wind-induced sway value after tensioning. Excessive wind-induced displacement of the conductor can directly compress the distance between the newly constructed conductor and the operational line, potentially leading to contact and causing faults such as line flashover discharge and arc burns on the conductors.

[0003] Currently, wind deflection control during tension laying is mainly achieved by controlling tension laying parameters or setting up temporary guy wires. Controlling tension laying parameters relies on increasing conductor tension to reduce wind deflection; however, excessive tension increases conductor wear and breakage risk, affecting laying quality. Furthermore, adjustments are often triggered, leading to response lag in complex wind conditions and poor protection. Setting up temporary guy wires relies on external anchoring structures and manual pre-tensioning to suppress wind deflection. This method is not only cumbersome and space-consuming, but the static structure of the guy wires cannot dynamically adjust the constraint effect according to wind conditions. Moreover, during the continuous movement of the conductor to be laid, the guy wires are easily dragged, altering the stress state, resulting in poor reliability for long-distance tension laying operations.

[0004] In summary, the current method of controlling conductor wind deflection is a passive protection. Due to factors such as response lag and fixed constraint forms, the response speed of wind deflection suppression is slow and the reliability is poor in the construction environment of complex wind fields and long-distance continuous laying, which makes it difficult to meet the safety requirements of tension laying construction near live lines. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of current passive protection for conductor wind deflection control, which is difficult to adapt to complex wind fields and long-span laying construction environments, and has a slow response speed and poor reliability in wind deflection suppression. This invention provides a method and system for limiting conductor wind deflection in tension laying. By setting an insulated arc-shaped limiting ring to actively limit the lateral swing range of the conductor to be laid, and predicting the position of maximum wind deflection during the laying process, the insulated arc-shaped limiting ring is moved and adjusted to achieve real-time perception and rapid response to complex wind field changes, thereby dynamically adapting to the conductor swing state and ensuring the reliability of wind deflection suppression.

[0006] The objective of this invention is achieved through the following technical solution: Methods for limiting conductor wind deflection applied to tension wire laying include: Based on the planning path of tension laying, wind deflection limiting positions are selected, and corresponding insulated arc-shaped limiting rings are set at each wind deflection limiting position; The conductor to be laid is laid along the planned path, with the constraint condition of passing through the insulated arc-shaped limiting ring. After the conductor to be laid passes through the corresponding insulated arc-shaped limiting ring, wind deflection monitoring is activated at the corresponding wind deflection limiting position to collect corresponding wind force data and the reference distance between the conductor to be laid and the adjacent live line. Based on wind data and the current tension of the conductor to be deployed, predict the location of the maximum wind deflection of the conductor to be deployed; Based on the location of the maximum wind deflection of the conductor to be laid and the reference distance, calculate the minimum safe distance between the conductor to be laid and the adjacent live line. Based on the minimum safe distance and combined with the preset safe distance threshold, the corresponding insulating arc-shaped limiting ring is moved and adjusted.

[0007] Furthermore, the method of screening wind deflection limiting positions based on the tension-based wire laying planning path and setting corresponding insulated arc-shaped limiting rings at each wind deflection limiting position includes: Based on the planning path of tension-based line laying, the tower distribution information is determined, and the construction area is delineated; Based on the location information of each live line in the construction area, identify the closely parallel sections where the horizontal distance between the planned path and the live line is less than a preset distance threshold. The middle position of the closely spaced parallel section is used as the wind deflection limiting position, and an insulating arc-shaped limiting ring is set for each wind deflection limiting position through the climbing device.

[0008] Furthermore, the step of setting insulated arc-shaped limiting rings corresponding to each wind deflection limiting position via the climbing device includes: Determine the existing parallel overhead ground wires between adjacent towers along the planned path, and select installation positions on the parallel overhead ground wires that are longitudinally aligned with each wind deflection limit position. Install climbing wire devices at each installation position of the parallel overhead ground wire, with each wind deflection limiting position corresponding to a set of symmetrically arranged climbing wire devices; Insulated load-bearing ropes are laid between symmetrically arranged climbing devices, and the insulated load-bearing ropes hang down to form insulated arc-shaped limiting rings.

[0009] Furthermore, the prediction of the location of maximum wind deflection of the conductor to be deployed based on wind data and the current tension of the conductor includes: Based on the measured wind force data within the preset collection period, predict the wind force data at the corresponding wind deflection limit location; Based on real-time wind data and wind forecast data, the fluctuation range of the lateral wind speed and wind direction parameters perpendicular to the conductor to be laid at the corresponding wind deflection limit position is determined. Based on the fluctuation range of lateral wind speed and wind direction parameters, the corresponding equivalent wind load sequence acting on the conductor to be laid is calculated. Based on the current tension of the conductor to be laid, the conductor parameters, and the span parameters of the section where the corresponding wind deflection limit position is located, the dynamic swing envelope set of the conductor to be laid is calculated in combination with the corresponding equivalent wind load sequence. Obtain the extreme offset position of the corresponding dynamic swing envelope set, and use the extreme offset position as the position of the maximum wind deflection of the conductor to be laid.

[0010] Furthermore, the calculation of the minimum safe distance between the conductor to be laid and adjacent live lines based on the maximum wind deflection position and reference distance of the conductor to be laid includes: The horizontal displacement of the wind deflection is obtained based on the location of the maximum wind deflection of the conductor to be laid; Based on the wind-induced horizontal displacement and the reference distance, the minimum safe distance between the conductor to be laid and the adjacent energized line is calculated.

[0011] Furthermore, the adjustment of the corresponding insulating arc-shaped limiting ring based on the minimum safety distance and in conjunction with a preset safety distance threshold includes: When the minimum safe distance is less than the preset safe distance threshold, the position of the offset of the maximum wind deflection on the conductor to be released by the control arc limiting ring is moved and adjusted. When the minimum safe distance is greater than or equal to the preset safe distance threshold, the movement strategy of the insulating arc-shaped limiting ring is formulated based on the ratio of the minimum safe distance to the preset safe distance threshold and the current position of the insulating arc-shaped limiting ring.

[0012] Furthermore, the adjustment of the offset position of the control insulation arc limiting ring towards the conductor to be released, which generates the maximum wind deflection, includes: Calculate the deviation between the minimum safe distance and the preset safe distance threshold; When the deviation is less than the deviation threshold, the movement amount is determined based on the offset position of the position where the wind deflection is the maximum on the conductor to be laid, and the insulation arc limiting ring is controlled to move to the offset position side of the position where the wind deflection is the maximum on the conductor to be laid by the corresponding movement amount. When the deviation is greater than or equal to the deviation threshold, the amount of movement is determined based on the offset position of the position where the wind deflection is maximum on the conductor to be laid, and the sag size corresponding to the insulating arc limiting ring is matched. The insulating arc-shaped limiting ring is moved by a corresponding amount towards the offset position of the conductor to be laid, where the wind deflection is greatest. After the movement, the insulating arc-shaped limiting ring is adjusted to the corresponding sag size.

[0013] Furthermore, the step of formulating a movement strategy for the insulating arc-shaped limiting ring based on the ratio of the minimum safe distance to a preset safe distance threshold, combined with the current position of the insulating arc-shaped limiting ring, includes: When the ratio of the minimum safe distance to the preset safe distance threshold is greater than or equal to the preset ratio threshold, obtain the offset between the current position and the initial installation position of the insulating arc-shaped limiting ring; When the offset exceeds the offset threshold, the control insulation arc limiting loop returns to the initial installation position; Maintain the current position of the insulating arc-shaped limiting ring as long as the offset does not exceed the offset threshold; When the ratio of the minimum safe distance to the preset safe distance threshold is less than the preset ratio threshold, the control insulation arc-shaped limiting ring is dynamically reciprocated.

[0014] Furthermore, the control of the insulating arc-shaped limiting ring to move dynamically back and forth includes: Within a preset time interval, the deviation between the current minimum safe distance and the preset safe distance threshold is obtained, and the movement amplitude is matched based on the absolute value of the deviation. The direction of movement is determined based on the sign of the current deviation, and a single movement action is performed in combination with the movement amplitude. When the next preset time interval is reached, the minimum safety distance is updated, and the corresponding movement amplitude and direction of movement are determined before the next movement action is performed.

[0015] A conductor wind deflection limiting system applied to tension wire laying, used to perform any of the wind deflection limiting methods described above, including: The monitoring and planning module is used to screen wind deflection limitation locations based on the planned path of tension laying and to set wind deflection limitation devices at each wind deflection limitation location to form an insulated arc-shaped limitation ring for limiting the wind deflection of the conductor to be laid. The wind deflection monitoring module is used to collect corresponding wind force data and the reference distance between the conductor to be laid and the adjacent live line at the wind deflection limitation position through which the conductor to be laid passes. Combined with the maximum wind deflection position of the conductor to be laid identified based on the wind force data and the current tension of the conductor to be laid, the minimum safe distance between the conductor to be laid and the adjacent live line is calculated. The wind deflection control module is used to control the wind deflection limiting device based on the minimum safe distance and a preset safe distance threshold, and to move and adjust the corresponding insulated arc-shaped limiting ring.

[0016] The beneficial effects of this invention are: By setting up an insulated arc-shaped limiting ring and using the conductor passing through this ring as a constraint condition for deployment, the lateral swing range of the conductor is limited to the safe area defined by the arc-shaped ring. This eliminates the need to adjust tension deployment parameters, ensuring the reliability of wind deflection constraint while decoupling wind deflection suppression from tension control. During deployment, wind force data and conductor spacing are collected. Combined with wind conditions and real-time conductor tension, the extreme wind deflection position of the conductor is predicted in advance to quantify the fluctuation characteristics of the current wind field. Based on the prediction results and the collected reference distance, the position of the insulated arc-shaped limiting ring is adaptively adjusted so that the constraint position always matches the conductor's swing state. This ensures that the conductor and the live line maintain a safe distance under any wind conditions, while avoiding excessive friction and improving the reliability of long-distance conductor deployment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a process of the present invention; Figure 2 This is a schematic diagram of a process for adjusting the offset position of the maximum wind deflection position on the conductor to be released in the insulated arc-shaped limiting loop according to an embodiment of the present invention. Figure 3 This is a schematic flowchart illustrating a method for determining the movement strategy of an insulating arc-shaped limiting ring based on its current position, according to an embodiment of the present invention. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Example: Methods for limiting conductor wind deflection applied to tension wire laying, such as Figure 1 As shown, it includes: Based on the planning path of tension laying, wind deflection limiting positions are selected, and corresponding insulated arc-shaped limiting rings are set at each wind deflection limiting position; The conductor to be laid is laid along the planned path, with the constraint condition of passing through the insulated arc-shaped limiting ring. After the conductor to be laid passes through the corresponding insulated arc-shaped limiting ring, wind deflection monitoring is activated at the corresponding wind deflection limiting position to collect corresponding wind force data and the reference distance between the conductor to be laid and the adjacent live line. Based on wind data and the current tension of the conductor to be deployed, predict the location of the maximum wind deflection of the conductor to be deployed; Based on the location of the maximum wind deflection of the conductor to be laid and the reference distance, calculate the minimum safe distance between the conductor to be laid and the adjacent live line. Based on the minimum safe distance and combined with the preset safe distance threshold, the corresponding insulating arc-shaped limiting ring is moved and adjusted.

[0020] Based on the planned path of tension-based wire laying, locations with wind deflection risk are selected, and corresponding insulated arc-shaped limiting rings are set at each location. The passage of the wire to be laid through each insulated arc-shaped limiting ring serves as a constraint condition for subsequent tension-based wire laying. The physical constraint of the insulated arc-shaped limiting rings physically limits the lateral swing range of the wire to be laid within a defined safe area, eliminating the need to excessively increase the laying tension to improve wind deflection suppression. This ensures the reliability of wind deflection constraint while decoupling wind deflection suppression from tension control, avoiding the risk of wire wear and breakage caused by excessive tension.

[0021] To further optimize the wind deflection suppression effect, based on the physical constraint provided by the insulated arc-shaped limiting ring, the maximum wind deflection position of the conductor to be laid is predicted in real time during the tension laying process by using wind data and the current tension of the conductor to be laid. That is, the limit offset position that the conductor may reach under the current wind conditions and tension conditions. In this way, the sway uncertainty caused by wind speed fluctuations and wind direction changes in the actual wind field is quantified by the limit offset position.

[0022] Based on the location of maximum wind deflection and combined with the collected reference distance between the conductor to be laid and the adjacent energized line, the minimum safe distance is accurately identified. This minimum safe distance quantifies the fault risk between the conductor to be laid and the energized line. Furthermore, the position of the insulating arc-shaped limiting ring is dynamically adjusted according to the minimum safe distance to tighten the constraint before the actual risk occurs. This ensures that the constraint position of the insulating arc-shaped limiting ring can adapt to changes in wind conditions, guaranteeing a safe distance between the conductor to be laid and the energized line under any wind conditions. This effectively improves the reliability of tension laying in long-distance laying conditions and complex wind field environments.

[0023] In tension wire laying construction, the planned path of the newly laid conductor may have sections spatially adjacent to live power lines, posing a risk of wind deflection. Within these adjacent sections, the spatial relationship between the newly laid conductor and the live power line manifests in two main ways: one is that the newly laid conductor and the live power line run parallel to each other with a small horizontal distance in some sections; the other is that at some points, the newly laid conductor crosses or passes under the live power line, forming a crossing. However, in actual construction environments, crossing scenarios require the live power line to be de-energized during construction to ensure line safety. Therefore, this embodiment only applies wind deflection restrictions to sections with close parallel runs.

[0024] Therefore, after determining the planned path for tensioning and laying, the sections with closely spaced parallel sections are first selected, and corresponding wind deflection restrictions are imposed on these sections. Other sections, since there are no adjacent live lines, do not require corresponding wind deflection restriction measures, thus optimizing the resource constraints.

[0025] Meanwhile, wind deflection is specifically limited by setting an insulated arc-shaped limiting ring. Instead of relying on increasing conductor tension to suppress wind deflection, a physical boundary is set at high altitude to directly block the lateral swing of the conductor, thereby decoupling wind deflection suppression from tension control and avoiding the risk of conductor damage caused by high tension.

[0026] The step of screening wind deflection limiting positions based on the planning path of tension-based wire laying, and setting corresponding insulated arc-shaped limiting rings at each wind deflection limiting position, includes: Based on the planning path of tension-based line laying, the tower distribution information is determined, and the construction area is delineated; Based on the location information of each live line in the construction area, identify the closely parallel sections where the horizontal distance between the planned path and the live line is less than a preset distance threshold. The middle position of the closely spaced parallel section is used as the wind deflection limiting position, and an insulating arc-shaped limiting ring is set for each wind deflection limiting position through the climbing device.

[0027] Based on the tower coordinates and span information of the planned route, the distribution location of each tower along the route is determined, and the current construction work area is delineated accordingly.

[0028] Within the designated construction area, the route, voltage level, and tower coordinates of all operational power lines are obtained. The planned path is compared with the spatial location of each power line to calculate the horizontal distance between the planned path and the power lines. Sections with a distance lower than the preset safety distance threshold are selected as close parallel sections.

[0029] The maximum sag position of the closely parallel section is then determined as the wind deflection limit position where wind deflection protection needs to be set. Wind deflection protection is only carried out on closely parallel sections with high wind deflection risk. While ensuring the effectiveness of wind deflection protection, the ineffective deployment of protective devices in low-risk sections is avoided, thereby achieving the optimal allocation of protection resources.

[0030] The selected wind deflection limiting positions are two-dimensional plane points calculated based on the spatial relationship between the planned path and the live line. These points are located on the laying trajectory of the conductor to be laid. The insulated arc-shaped limiting ring needs to be suspended at a certain height above the conductor to form an effective lateral constraint. If this position is directly fixed to a point on the ground wire, although the arc-shaped ring can be suspended, the resulting constraint is static. The position and span of the insulated arc-shaped limiting ring cannot be dynamically adjusted according to real-time wind conditions. During tension laying, wind speed, wind direction, and the distance between the conductor and the live line change in real time. Static constraints cannot adapt to these changes; either the constraint is too tight, causing unnecessary friction, or too loose, failing to effectively limit wind deflection.

[0031] Therefore, by further utilizing the existing parallel overhead ground wires as the load-bearing structure, two corresponding climbing devices are installed at each wind deflection limiting position, and an insulated load-bearing rope is connected between the two climbing devices. The spacing and release length are controlled so that the insulated load-bearing rope hangs down naturally to form an upward-opening arc ring. Without the need to erect additional temporary supports, a movable physical constraint structure can be quickly deployed above each high-risk section, making full use of existing facilities and reducing construction costs and operational complexity.

[0032] The method of setting insulated arc-shaped limiting rings corresponding to each wind deflection limiting position via the climbing device includes: Determine the existing parallel overhead ground wires between adjacent towers along the planned path, and select installation positions on the parallel overhead ground wires that are longitudinally aligned with each wind deflection limit position. Install climbing wire devices at each installation position of the parallel overhead ground wire, with each wind deflection limiting position corresponding to a set of symmetrically arranged climbing wire devices; Insulated load-bearing ropes are laid between symmetrically arranged climbing devices, and the insulated load-bearing ropes hang down to form insulated arc-shaped limiting rings.

[0033] First, determine the existing parallel overhead ground wires between adjacent towers on the planned path. These parallel overhead ground wires include two parallel overhead ground wires, which are continuously laid along the line direction and located above the conductor to be laid.

[0034] For each wind deflection limiting position, its mileage position along the planned path is vertically projected upwards onto the corresponding parallel overhead ground line segment, resulting in installation points longitudinally aligned with the mileage position on both overhead ground lines. The installation points on the two overhead ground lines are symmetrical to each other in the lateral direction. A climbing device is installed at each of the symmetrical installation points to obtain a set of symmetrically arranged climbing devices corresponding to the wind deflection limiting position.

[0035] An insulated load-bearing rope is connected between these symmetrical climbing devices. The rope crosses the two ground wires on the left and right sides and hangs down naturally under the action of gravity, forming an arc-shaped loop with the opening facing upward. Since there is a fixed lateral distance between the two ground wires, the lateral opening width of the arc-shaped loop is determined by this distance, while the size of the sag is adjusted by controlling the length of the rope that is released.

[0036] After forming the insulated arc-shaped limiting rings, tension wire is laid out according to the planned path. The conductor to be laid is led out from the tension field and passes through the interior of each insulated arc-shaped limiting ring in sequence before connecting to the traction field. During normal laying, the conductor to be laid does not come into contact with the insulated arc-shaped limiting rings, and the laying efficiency is not affected. However, when the conductor to be laid swings towards the adjacent live line side due to lateral wind force, its lateral displacement will be physically blocked by the ropes of the insulated arc-shaped limiting rings, thus forcibly limiting it within the safe lateral range defined by the arc-shaped rings.

[0037] After passing through the corresponding insulated arc-shaped limiting ring, wind deflection monitoring at the corresponding location is activated to collect the reference distance between the conductor to be laid and the adjacent live line, and to record wind data in real time, so as to reflect the operating conditions of the conductor to be laid under the constraint of the insulated arc-shaped limiting ring in real time, and then adaptively adjust the position of the insulated arc-shaped limiting ring to ensure the wind deflection suppression effect.

[0038] The reference distance between the conductor to be laid and the adjacent live line is actually calculated by collecting the distance between the climbing device installed on the overhead ground wire near the adjacent live line and the adjacent live line, and combining it with the distance between the conductor to be laid and the overhead ground wire.

[0039] Both the overhead ground wire and the live line are in a stable state during construction. The conductor to be laid and the overhead ground wire are in a parallel state with longitudinal alignment under normal working conditions without wind deflection. Therefore, by collecting the distance between the climbing device and the live line, and combining it with the fixed longitudinal distance between the conductor to be laid and the overhead ground wire, a reference distance representing the original safety margin of the conductor to be laid when there is no wind deflection can be obtained through simple side length conversion.

[0040] The calculated baseline distance only represents the original safety margin of the conductor under ideal conditions without wind deflection. It cannot reflect the dynamic reduction of the actual distance caused by wind deflection. The wind force will cause the conductor to deflect laterally. The magnitude of the deflection is actually related to many factors such as wind speed, wind direction, conductor tension, span, and conductor parameters. Moreover, these factors change in real time during the laying process.

[0041] Therefore, based on the collected wind data, the maximum possible offset position of the conductor under the current working conditions can be directly given through mechanical calculations. The obtained maximum offset position can effectively quantify the compression effect of wind deflection on the safety distance. By combining it with the reference distance, the dynamic minimum safety distance can be obtained, thereby quantifying the fault risk caused by the insufficient distance between the conductor to be laid and the adjacent energized conductor.

[0042] The step of predicting the location of maximum wind deflection of the conductor to be deployed based on wind data and the current tension of the conductor includes: Based on the measured wind force data within the preset collection period, predict the wind force data at the corresponding wind deflection limit location; Based on real-time wind data and wind forecast data, the fluctuation range of the lateral wind speed and wind direction parameters perpendicular to the conductor to be laid at the corresponding wind deflection limit position is determined. Based on the fluctuation range of lateral wind speed and wind direction parameters, the corresponding equivalent wind load sequence acting on the conductor to be laid is calculated. Based on the current tension of the conductor to be laid, the conductor parameters, and the span parameters of the section where the corresponding wind deflection limit position is located, the dynamic swing envelope set of the conductor to be laid is calculated in combination with the corresponding equivalent wind load sequence. Obtain the extreme offset position of the corresponding dynamic swing envelope set, and use the extreme offset position as the position of the maximum wind deflection of the conductor to be laid.

[0043] Within the typical span range of tension stringing construction, the spatial distribution of the wind field has good continuity, and the differences in wind speed and direction between different locations within the same section are usually small. Therefore, all measured wind force data collected at the wind deflection limit location within the preset collection period are obtained and used as the overall wind force data for the corresponding section. The wind force data includes wind speed data and wind direction parameters.

[0044] Considering the random fluctuations in outdoor wind fields, relying solely on real-time instantaneous values ​​may lead to errors in wind deflection estimation. Therefore, all acquired wind speed and wind direction parameters are sorted according to the acquisition time to form wind speed and wind direction time series. Exponential smoothing is then used to perform short-term predictions on the acquired wind speed and wind direction time series, resulting in wind speed and wind direction prediction sequences for a certain period in the future, which are then used as wind force prediction data.

[0045] The acquired wind speed forecast data and measured wind speed data are merged in chronological order to obtain the merged wind speed sequence and wind direction sequence.

[0046] Since only the component perpendicular to the conductor's direction plays a major role in lateral wind deflection in the wind load acting on the conductor, the angle between the wind direction and the deployment direction is first calculated based on the deployment direction of the conductor to be deployed at the wind deflection limit location, combined with the wind direction sequence. Then, the lateral wind speed component sequence corresponding to the wind speed sequence is calculated using the angle between the wind direction and the deployment direction, combined with trigonometric function relationships.

[0047] The maximum and minimum values ​​in the lateral wind speed component sequence are obtained and used as upper and lower limits to form the fluctuation range of lateral wind speed. The oscillation angle range of wind direction is determined by the wind direction parameters within a preset collection period and used as the fluctuation range of wind direction parameters.

[0048] Each lateral wind speed value within the range of lateral wind speed fluctuations is converted into an equivalent wind load acting on a unit length of conductor, forming an equivalent wind load sequence. Each load value in the formed equivalent wind load sequence corresponds to a possible wind condition.

[0049] By combining the real-time tension of the conductor to be laid, the conductor parameters, and the actual length of the span where the wind deflection limit is located, the catenary mechanical model is used to calculate the lateral swing trajectory of the conductor under the action of each load in the equivalent wind load sequence.

[0050] The real-time tension can be obtained through the traction machine control system used in tension wire laying, and the conductor parameters include physical parameters such as the diameter of the conductor to be laid, the weight per unit length, and the elastic modulus.

[0051] In the calculation, the conductor to be laid is considered as a flexible cable subjected to a uniformly distributed lateral wind load. By solving the equilibrium differential equation of the conductor under the lateral load, the lateral offset distribution curve of the conductor at each point along the span is obtained. The corresponding offset distribution curves under all lateral loads are plotted in the same coordinate system, forming a set of dynamic swing envelopes. When forming the set of dynamic swing envelopes, the abscissa of its coordinate system is specifically defined as the position along the span, i.e., the distance in meters from one of the towers, and the ordinate is defined as the lateral offset of the conductor to be laid at that position, i.e., the number of meters it swings towards the live line.

[0052] Find the peak point in the upper boundary of the dynamically swinging envelope set. This peak point is the limit offset position that the conductor to be deployed may reach under the current wind and tension conditions, and take this limit offset position as the position of the maximum wind deflection of the conductor to be deployed.

[0053] After obtaining the location of maximum wind deflection, based on the location of maximum wind deflection of the conductor to be laid and the reference distance, the minimum safe distance between the conductor to be laid and the adjacent live line is calculated, including: The horizontal displacement of the wind deflection is obtained based on the location of the maximum wind deflection of the conductor to be laid; Based on the wind-induced horizontal displacement and the reference distance, the minimum safe distance between the conductor to be laid and the adjacent energized line is calculated.

[0054] Since the protection section for wind deflection suppression is a parallel section, and the overhead ground wire is parallel to the conductor to be laid, all three are actually in a parallel position. The overhead ground wire and the adjacent live conductor are in a stable state in actual operation. The reference distance calculated based on the distance between the climbing device and the adjacent live conductor can actually reflect the original safety margin of the entire conductor to be laid in the corresponding section when no wind deflection occurs.

[0055] Based on the ordinate value of the location of maximum wind deflection in the corresponding coordinate system, the horizontal displacement of the conductor to be laid corresponding to the location of maximum wind deflection is determined. Subtracting the determined horizontal displacement from the reference distance yields the minimum safe distance between the conductor to be laid and the adjacent live line under the current wind and tension conditions. The obtained minimum safe distance is the remaining safe distance for the conductor to be laid under extreme wind deflection conditions in the current wind environment.

[0056] Considering that the wind deflection suppression of the conductor to be laid by the insulated arc-shaped limiting ring is achieved through physical limiting means, physical friction will be generated during wind deflection suppression. If the position of the insulated arc-shaped limiting ring is adjusted to completely follow the position of the maximum wind deflection, it may lead to excessive friction between the conductor to be laid and the insulated arc-shaped limiting ring, which will affect construction safety.

[0057] Therefore, based on obtaining the minimum safe distance, the risk level of the conductor to be released is further assessed by combining the preset safe distance threshold, and then a targeted strategy for adjusting the movement of the insulation arc limiting ring is formulated. This can ensure that the conductor to be released maintains a safe distance from the adjacent live line, while avoiding excessive constraints and ensuring the wind deflection suppression effect.

[0058] The step of adjusting the movement of the corresponding insulating arc-shaped limiting ring based on the minimum safety distance and a preset safety distance threshold includes: When the minimum safe distance is less than the preset safe distance threshold, the position of the offset of the maximum wind deflection on the conductor to be released by the control arc limiting ring is moved and adjusted. When the minimum safe distance is greater than or equal to the preset safe distance threshold, the movement strategy of the insulating arc-shaped limiting ring is formulated based on the ratio of the minimum safe distance to the preset safe distance threshold and the current position of the insulating arc-shaped limiting ring.

[0059] When the minimum safe distance is less than the preset safe distance threshold, it indicates that under the current wind and tension conditions, the remaining safety margin between the conductor to be laid and the live line at the extreme offset point is insufficient, posing a risk of flashover or contact with the line. In this case, the climbing device needs to be driven to move along the overhead ground wire in the direction of the maximum wind deflection of the conductor to be laid, so that the insulating arc-shaped limiting ring is moved to the vicinity of this extreme offset point. The constraint center of the insulating arc-shaped limiting ring is then aligned with the section of the conductor where the actual swing is most severe, thus providing physical obstruction at the most dangerous location.

[0060] Furthermore, different levels of response measures are designed for risks of varying severity. When the deviation is small, it indicates that although there is a risk to the conductor to be released, the degree of safety margin deficiency is limited. The constraint boundary can be adjusted to a suitable position simply by translating the arc-shaped ring, without the need for additional sag tightening. This avoids unnecessary rope contraction and mechanism movement, reducing mechanical wear and energy consumption. When the deviation is large, it indicates that the conductor to be released is almost touching the live line under extreme wind deflection. In this case, because the original opening span of the insulating arc-shaped limiting ring is large, simply translating the insulating arc-shaped limiting ring may still leave a large swing gap, and the conductor to be released may still swing significantly within the ring. Therefore, it is necessary to simultaneously reduce the constraint range of the insulating arc-shaped limiting ring, making the rope closer to the trajectory of the conductor to be released, thereby further compressing the movement space of the conductor to be released physically.

[0061] This tiered control strategy can ensure sufficient constraints under severe risks while avoiding friction and energy consumption caused by excessive adjustments under mild risks, thereby improving the accuracy of wind deflection suppression.

[0062] Specifically, through this hierarchical control strategy, such as Figure 2 As shown, the offset position of the control insulation arc limiting ring towards the conductor to be laid, which generates the maximum wind deflection, is adjusted, including: Calculate the deviation between the minimum safe distance and the preset safe distance threshold; When the deviation is less than the deviation threshold, the movement amount is determined based on the offset position of the position where the wind deflection is the maximum on the conductor to be laid, and the insulation arc limiting ring is controlled to move to the offset position side of the position where the wind deflection is the maximum on the conductor to be laid by the corresponding movement amount. When the deviation is greater than or equal to the deviation threshold, the amount of movement is determined based on the offset position of the position where the wind deflection is maximum on the conductor to be laid, and the sag size corresponding to the insulating arc limiting ring is matched. The insulating arc-shaped limiting ring is moved by a corresponding amount towards the offset position of the conductor to be laid, where the wind deflection is greatest. After the movement, the insulating arc-shaped limiting ring is adjusted to the corresponding sag size.

[0063] Calculate the difference between the preset safe distance threshold and the minimum safe distance to obtain the corresponding deviation. This deviation represents the degree of inadequacy of the current safety margin. The larger the deviation, the more serious the risk.

[0064] Compare the deviation amount with the preset deviation threshold. If the deviation amount is less than the deviation threshold, it means that although the safety margin is insufficient, it is not serious. At this time, it is only necessary to move the insulating arc-shaped limiting ring towards the direction of the maximum wind deflection of the conductor to be released, and keep the position of the insulating arc-shaped limiting ring at the offset position of the maximum wind deflection.

[0065] Specifically, the location of maximum wind deflection, i.e., the point where the conductor swings most violently, is determined from the upper envelope of the dynamic swing envelope, and the exact location of this point within the span is confirmed. Combining the span position of the climbing device on the overhead line, the location of maximum wind deflection is compared with the current span position of the climbing device to determine the direction of movement, and the difference in distance between the two is taken as the amount of movement.

[0066] The drive climbing device moves along the overhead ground wire by a corresponding amount in the direction of movement, aligning the projection of the center of the insulating arc-shaped limiting ring in the span direction with the horizontal coordinate of the position of maximum wind deflection. During the movement, the sag of the insulating arc-shaped limiting ring remains constant. After the movement is complete, the insulating arc-shaped limiting ring is positioned directly above the section of the conductor that experiences the most severe swaying, effectively preventing extreme deviations in the conductor.

[0067] If the deviation is greater than or equal to the deviation threshold, it indicates a severe lack of safety margin. The conductor to be laid is highly likely to approach or even touch a live line under extreme wind deflection, and simply translating the insulating arc-shaped limiting ring is insufficient to provide adequate constraint. Therefore, while performing the translation operation, it is also necessary to adjust the sag of the arc-shaped ring. In this case, the determination method for the amount and direction of translation is the same as when the deviation is less than the deviation threshold.

[0068] After the drive climbing device moves to the offset position where the wind deflection is at its maximum, the corresponding sag size is further matched according to the magnitude of the deviation; the larger the deviation, the smaller the sag size. The specific correspondence between the deviation and the sag size can be set according to actual needs. Specifically, the sag size of the insulated arc-shaped limiting ring can be adjusted by tightening the insulated load-bearing rope, thus shortening the effective length of the rope.

[0069] When the minimum safe distance is greater than or equal to the preset safe distance threshold, it indicates that the current safety margin meets the requirements. In order to reduce the contact wear between the conductor to be released and the insulated arc-shaped limiting ring, the adequacy of the safety margin is further quantified by the ratio of the minimum safe distance to the preset safe distance threshold, and then the corresponding movement strategy is selected. While ensuring the wind deflection suppression effect, mechanical wear is reduced and the device life is extended.

[0070] Specifically, such as Figure 3 As shown, the step of formulating a movement strategy for the insulating arc-shaped limiting ring based on the ratio of the minimum safe distance to a preset safe distance threshold, combined with the current position of the insulating arc-shaped limiting ring, includes: When the ratio of the minimum safe distance to the preset safe distance threshold is greater than or equal to the preset ratio threshold, obtain the offset between the current position and the initial installation position of the insulating arc-shaped limiting ring; When the offset exceeds the offset threshold, the control insulation arc limiting loop returns to the initial installation position; Maintain the current position of the insulating arc-shaped limiting ring as long as the offset does not exceed the offset threshold; When the ratio of the minimum safe distance to the preset safe distance threshold is less than the preset ratio threshold, the control insulation arc-shaped limiting ring is dynamically reciprocated.

[0071] When the ratio of the minimum safety distance to the preset safety distance threshold is greater than or equal to the preset ratio threshold, it indicates that the current safety margin is relatively high. At this time, the offset between the current position of the insulating arc-shaped limiting ring and the initial installation position is further calculated, and the offset is compared with the preset offset threshold.

[0072] If the offset exceeds the offset threshold, it indicates that the insulating arc-shaped limiting ring has significantly deviated from its initial position due to previous strong winds or adjustments. If it continues to remain in that position, it will cause unnecessary friction between the conductor to be laid and the insulating carrying rope, increasing the resistance to laying the wire and also occupying the forward travel. Therefore, control the climbing device to move back to the initial installation position so that the insulating arc-shaped limiting ring returns to its original position.

[0073] If the offset does not exceed the offset threshold, it means that the current position of the insulating arc-shaped limiting ring is very close to the initial installation position. The slight deviation will not cause significant friction or travel loss, and the current position of the insulating arc-shaped limiting ring can be kept unchanged, avoiding mechanical wear caused by frequent small movements.

[0074] When the ratio of the minimum safe distance to the preset safe distance threshold is less than the preset ratio threshold, it indicates that the safety margin is in a critical state. Although the minimum safe distance has not yet fallen below the threshold, it is close to the critical point, and wind conditions may fluctuate at any time, causing the safe distance to decrease further. At this time, the dynamic reciprocating movement mode is entered, so that the insulated arc-shaped limiting ring always conforms to the real-time swing of the conductor. Even if the safe distance decreases, the insulated arc-shaped limiting ring can still be in a position close to the offset position corresponding to the maximum wind deflection position, which can provide constraint more quickly and improve the response speed of wind deflection suppression.

[0075] The control of the insulating arc-shaped limiting ring to move dynamically back and forth includes: Within a preset time interval, the deviation between the current minimum safe distance and the preset safe distance threshold is obtained, and the movement amplitude is matched based on the absolute value of the deviation. The direction of movement is determined based on the sign of the current deviation, and a single movement action is performed in combination with the movement amplitude. When the next preset time interval is reached, the minimum safety distance is updated, and the corresponding movement amplitude and direction of movement are determined before the next movement action is performed.

[0076] The system cyclically acquires the current minimum safe distance at preset time intervals, calculates its deviation from a preset safe distance threshold, and determines the movement direction based on the sign of the deviation. If the minimum safe distance is greater than the threshold, it moves away from the live line; if it is less than the threshold, it moves closer to the live line. The movement amplitude is then matched to the absolute value of the deviation; a larger deviation results in a larger amplitude, but the movement amplitude must be limited to a predetermined range, which can be set according to actual needs.

[0077] Each cycle executes a movement action, causing the insulated arc-shaped limiting ring to make small-amplitude reciprocating movements, dynamically following the real-time swing of the conductor.

[0078] When the minimum safe distance re-enters the range where the ratio is greater than or equal to the preset ratio threshold and remains stable, the dynamic reciprocating movement mode is exited, and the return or movement adjustment is performed according to the minimum safe distance.

[0079] Another aspect of this embodiment provides a conductor wind deflection limiting system for tension wire laying, including: The monitoring and planning module is used to screen wind deflection limitation locations based on the planned path of tension laying and to set wind deflection limitation devices at each wind deflection limitation location to form an insulated arc-shaped limitation ring for limiting the wind deflection of the conductor to be laid. The wind deflection monitoring module is used to collect corresponding wind force data and the reference distance between the conductor to be laid and the adjacent live line at the wind deflection limitation position through which the conductor to be laid passes. Combined with the maximum wind deflection position of the conductor to be laid identified based on the wind force data and the current tension of the conductor to be laid, the minimum safe distance between the conductor to be laid and the adjacent live line is calculated. The wind deflection control module is used to control the wind deflection limiting device based on the minimum safe distance and a preset safe distance threshold, and to move and adjust the corresponding insulated arc-shaped limiting ring.

[0080] The monitoring and planning module is set on the user side. It can plan the corresponding wind deflection limit position and notify the relevant operators to set up the wind deflection limit device at the corresponding wind deflection limit position before tensioning and laying out the wire, so as to form the corresponding insulated arc-shaped limit ring.

[0081] The wind deflection monitoring module is connected to the wind deflection control module and both are installed on the wind deflection limiting device. The wind deflection monitoring module collects relevant data in real time to determine the wind deflection situation, while the wind deflection control module can formulate a corresponding movement adjustment strategy for the wind deflection limiting device based on the determined wind deflection situation.

[0082] The monitoring and planning module can be a computer or other equipment on the platform side, while the wind deflection monitoring module and wind deflection control module can be data processing components such as microprocessors with corresponding data processing capabilities.

[0083] The wind deflection monitoring module is also equipped with multiple sensors, such as wind force sensors and distance sensors, which can collect data such as ambient wind speed, wind direction and distance to adjacent power lines.

[0084] The wind deflection limiting device specifically includes a climbing cable device, a stepping guide rail, and an insulating rope retraction device. Each wind deflection limiting device comprises two climbing cable devices, symmetrically arranged on a parallel overhead ground line. Each climbing cable device includes a motor unit, a traveling pulley, and a connecting structure. The wind deflection limiting device moves on the overhead ground line via the motor unit and traveling pulley within the climbing cable device. The connecting structure connects the motor unit and the traveling pulley. The stepping guide rail connects the two climbing cable devices, and its extension and retraction are adjusted by the motor unit, thereby controlling the clamping pressure of the climbing cable device on the overhead ground line.

[0085] When the climbing device moves, the stepping guide rail extends, increasing the horizontal distance between the traveling pulleys and reducing the bearing pressure on the overhead ground wire. The forward and reverse rotation of the motor unit controls the traveling pulleys to move forward or backward on the conductor. When the climbing device stops, the locking device retracts its clamp to secure the overhead ground wire and prevent the climbing device from slipping.

[0086] The insulated carrying rope winding and unwinding device is a motor-controlled coil structure. One end of the coil is fixed to the end connected to the insulated carrying rope. The forward and reverse rotation of the insulated carrying rope winding and unwinding device can be controlled by the motor, thereby controlling the winding and unwinding of the insulated carrying rope and the exposed length of the insulated carrying rope. The motor of the insulated carrying rope winding and unwinding device is a different motor from the motor of the climbing device.

[0087] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

Claims

1. A method for limiting conductor wind deflection applied to tension wire laying, characterized in that, include: Based on the planning path of tension-based cable laying, wind deflection limiting locations are selected, and corresponding insulated arc-shaped limiting rings are set at each wind deflection limiting location. Specifically, the planning path based on tension-based cable laying determines the tower distribution information and delineates the construction area; based on the location information of each live line within the construction area, closely parallel sections where the horizontal distance between the planned path and the live lines is less than a preset distance threshold are identified; the maximum sag of the closely parallel section is used as the wind deflection limiting location; existing parallel overhead ground wires between adjacent towers on the planning path are identified, and installation positions on the parallel overhead ground wires aligned longitudinally with each wind deflection limiting location are selected; climbing devices are installed at each installation position on the parallel overhead ground wires, with each wind deflection limiting location corresponding to a symmetrically arranged set of climbing devices; insulated load-bearing ropes are laid between the symmetrically arranged climbing devices, and the insulated load-bearing ropes droop down to form insulated arc-shaped limiting rings. The conductor to be laid is laid along the planned path, with the constraint condition of passing through the insulated arc-shaped limiting ring. After the conductor to be laid passes through the corresponding insulated arc-shaped limiting ring, wind deflection monitoring is activated at the corresponding wind deflection limiting position to collect corresponding wind force data and the reference distance between the conductor to be laid and the adjacent live line. Based on wind data and the current tension of the conductor to be deployed, predict the location of the maximum wind deflection of the conductor to be deployed; Based on the location of the maximum wind deflection of the conductor to be laid and the reference distance, calculate the minimum safe distance between the conductor to be laid and the adjacent live line. Based on the minimum safe distance and combined with the preset safe distance threshold, the corresponding insulating arc-shaped limiting ring is moved and adjusted. When the minimum safe distance is less than the preset safe distance threshold, the insulating arc-shaped limiting ring is moved and adjusted towards the offset position of the position where the wind deflection is the maximum on the conductor to be released. When the minimum safe distance is greater than or equal to the preset safe distance threshold, the movement strategy of the insulating arc-shaped limiting ring is formulated based on the ratio of the minimum safe distance to the preset safe distance threshold and the current position of the insulating arc-shaped limiting ring.

2. The method for limiting conductor wind deflection applied to tension wire laying according to claim 1, characterized in that, The method of predicting the location of maximum wind deflection of the conductor to be deployed based on wind data and the current tension of the conductor includes: Based on the measured wind force data within the preset collection period, predict the wind force data at the corresponding wind deflection limit location; Based on real-time wind data and wind forecast data, the fluctuation range of the lateral wind speed and wind direction parameters perpendicular to the conductor to be laid at the corresponding wind deflection limit position is determined. Based on the fluctuation range of lateral wind speed and wind direction parameters, the corresponding equivalent wind load sequence acting on the conductor to be laid is calculated. Based on the current tension of the conductor to be laid, the conductor parameters, and the span parameters of the section where the corresponding wind deflection limit position is located, the dynamic swing envelope set of the conductor to be laid is calculated in combination with the corresponding equivalent wind load sequence. Obtain the extreme offset position of the corresponding dynamic swing envelope set, and use the extreme offset position as the position of the maximum wind deflection of the conductor to be laid.

3. The method for limiting conductor wind deflection applied to tension wire laying according to claim 1, characterized in that, The calculation of the minimum safe distance between the conductor to be laid and adjacent live lines, based on the maximum wind deflection location and reference distance of the conductor to be laid, includes: The horizontal displacement of the wind deflection is obtained based on the location of the maximum wind deflection of the conductor to be laid; Based on the wind-induced horizontal displacement and the reference distance, the minimum safe distance between the conductor to be laid and the adjacent energized line is calculated.

4. The method for limiting conductor wind deflection applied to tension wire laying according to claim 1, characterized in that, The adjustment of the offset position of the maximum wind deflection on the conductor to be released by the control insulation arc limiting loop includes: Calculate the deviation between the minimum safe distance and the preset safe distance threshold; When the deviation is less than the deviation threshold, the movement amount is determined based on the offset position of the position where the wind deflection is the maximum on the conductor to be laid, and the insulation arc limiting ring is controlled to move to the offset position side of the position where the wind deflection is the maximum on the conductor to be laid by the corresponding movement amount. When the deviation is greater than or equal to the deviation threshold, the amount of movement is determined based on the offset position of the position where the wind deflection is maximum on the conductor to be laid, and the sag size corresponding to the insulating arc limiting ring is matched. The insulating arc-shaped limiting ring is moved by a corresponding amount towards the offset position of the conductor to be laid, where the wind deflection is greatest. After the movement, the insulating arc-shaped limiting ring is adjusted to the corresponding sag size.

5. The method for limiting conductor wind deflection applied to tension wire laying according to claim 1, characterized in that, The step of formulating a movement strategy for the insulating arc-shaped limiting ring based on the ratio of the minimum safe distance to a preset safe distance threshold, combined with the current position of the insulating arc-shaped limiting ring, includes: When the ratio of the minimum safe distance to the preset safe distance threshold is greater than or equal to the preset ratio threshold, obtain the offset between the current position and the initial installation position of the insulating arc-shaped limiting ring; When the offset exceeds the offset threshold, the control insulation arc limiting loop returns to the initial installation position; Maintain the current position of the insulating arc-shaped limiting ring as long as the offset does not exceed the offset threshold; When the ratio of the minimum safe distance to the preset safe distance threshold is less than the preset ratio threshold, the control insulation arc-shaped limiting ring is dynamically reciprocated.

6. The method for limiting conductor wind deflection applied to tension wire laying according to claim 5, characterized in that, The control of the insulating arc-shaped limiting ring to move dynamically back and forth includes: Within a preset time interval, the deviation between the current minimum safe distance and the preset safe distance threshold is obtained, and the movement amplitude is matched based on the absolute value of the deviation. The direction of movement is determined based on the sign of the current deviation, and a single movement action is performed in combination with the movement amplitude. When the next preset time interval is reached, the minimum safety distance is updated, and the corresponding movement amplitude and direction of movement are determined before the next movement action is performed.

7. A conductor wind deflection limiting system applied to tension laying, used to execute the wind deflection limiting method according to any one of claims 1 to 6, characterized in that, include: The monitoring and planning module is used to screen wind deflection limitation locations based on the planned path of tension laying and to set wind deflection limitation devices at each wind deflection limitation location to form an insulated arc-shaped limitation ring for limiting the wind deflection of the conductor to be laid. The wind deflection monitoring module is used to collect corresponding wind force data and the reference distance between the conductor to be laid and the adjacent live line at the wind deflection limitation position through which the conductor to be laid passes. Combined with the maximum wind deflection position of the conductor to be laid identified based on the wind force data and the current tension of the conductor to be laid, the minimum safe distance between the conductor to be laid and the adjacent live line is calculated. The wind deflection control module is used to control the wind deflection limiting device based on the minimum safe distance and a preset safe distance threshold, and to move and adjust the corresponding insulated arc-shaped limiting ring.

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