A calculation method for preventing transmission line galloping

Abstract

The present invention belongs to the technical field of transmission lines, and in particular relates to a calculation method for preventing transmission line galloping. The present invention comprises: step 1. obtaining the transmission line morphology under current conditions; step 2. fitting a curve model equation according to discrete points based on the transmission line morphology; step 3. calculating the stress value of the transmission line under the current state based on the curve model equation; step 4. calculating the transmission line sag equation using the curve model equation; step 5. estimating the transmission line model under different meteorological conditions; step 6. establishing a transmission line galloping ellipsoid model to determine whether the phase-to-phase distance exceeds the limit. Under severe meteorological conditions, when the transmission line sag morphology cannot be obtained, the present invention can realize real-time monitoring of transmission line galloping through previously collected transmission line parameters, combined with micro-meteorological information and line parameters, so as to achieve the purpose of early warning and effectively maintain the stable operation of the power system.

Description

Technical Field

[0001] The present invention belongs to the technical field of power transmission lines, and in particular relates to a calculation method for preventing power transmission line galloping. Background Art

[0002] Overhead transmission lines are a vital component of the power system. Because they are installed outdoors, contaminants accumulate on the lines, and thermal expansion and contraction can cause sag and stress values ​​to differ from those designed. This can lead to galloping when affected by microtopography and micrometeorology. When galloping occurs, the inconsistent amplitudes of the galloping between different phases of the lines or between conductors and ground wires within the same span result in a small phase-to-phase distance, leading to phase-to-phase flashover tripping. According to statistics, when ice-covered transmission lines gallop, phase-to-phase flashover tripping occurs due to the small distance between the conductors or ground wires, accounting for over 50% of all incidents. Therefore, by obtaining the real-time sag of the transmission line based on micrometeorological information and line parameters, and establishing a galloping trajectory model, we can accurately determine whether the phase-to-phase distance between the conductors and ground wires exceeds the limit, thereby ensuring power system stability.

[0003] Traditional sag monitoring methods generally require surveyors to conduct on-site monitoring, which has limited accuracy, is time-consuming, and makes it difficult to achieve real-time sag monitoring.

[0004] For example, the application date is 2020.05.19, the patent publication number is CN111339692A, the patent number is 2020104225404, and the name is an invention patent application for a method and device for determining power line sag based on laser point cloud data. The application method includes: determining the power line point cloud data of the target power line between two adjacent towers in the target area based on laser point cloud data; applying a preset fitting method to determine the initial sag point and the initial sag value on the target power line; constructing a three-dimensional spatial range centered on the initial sag point in the power line point cloud data of the target power line; if the three-dimensional spatial range contains power line point cloud data, then using the position information of the point with the smallest elevation value to correct the initial sag point and the initial sag value to obtain the actual sag point and the actual sag value. This method can effectively improve the accuracy of obtaining power line sag, effectively save time and money costs for data processing, and improve the efficiency of obtaining power line sag, thereby improving the reliability and accuracy of using power line sag to monitor the operating status of transmission lines. Although this method can quickly measure the sag value, it fails to predict the sag in different weather conditions and determine the phase distance. Summary of the Invention

[0005] To address the shortcomings of the aforementioned prior art, the present invention provides a method for calculating transmission line gallop prevention. Its purpose is to enable real-time monitoring of transmission line gallop in adverse weather conditions, when line sag cannot be determined, thereby maintaining stable power system operation.

[0006] The technical solution adopted by the present invention to achieve the above-mentioned purpose is:

[0007] A calculation method for preventing transmission line galloping includes the following steps:

[0008] Step 1. Obtain the transmission line morphology under current conditions;

[0009] Step 2. Fit the curve model equation according to the discrete points based on the transmission line morphology;

[0010] Step 3. Calculate the stress value of the transmission line under the current state according to the curve model equation;

[0011] Step 4. Calculate the transmission line sag equation using the curve model equation;

[0012] Step 5. Estimate the transmission line model under different meteorological conditions;

[0013] Step 6. Establish a dancing ellipsoid model of the transmission line to determine whether the phase-to-phase distance exceeds the limit.

[0014] Furthermore, the step 1 of obtaining the transmission line morphology under the current conditions is to use a laser device to scan the power corridor, obtain the three-dimensional point cloud data of the power line, fit the collected discrete power line point cloud data, fit a curve, calculate the curve model equation, and record the micro-meteorological information when obtaining the point cloud data.

[0015] Furthermore, in step 2, the curve model equation is fitted based on the discrete points according to the transmission line morphology. The XOZ coordinate system is established with the span line between the two towers as the X-axis and the elevation as the Z-axis. The curve equation is solved in the XOZ coordinate plane. The conductor force analysis solves the curve model equation as follows:

[0016]

[0017] Among them, C1 and C2 are the coefficients of the belt, σ0 is the stress value, γ is the conductor load ratio, and the curve model equation is a two-dimensional catenary model. x is the horizontal coordinate value of any point on the fitting curve, and z is the sag vertical coordinate value.

[0018] Furthermore, the calculation of the transmission line sag equation using the curve model equation in step 4 is to solve the transmission line sag model in the current state according to the curve model equation, and the sag equation formula is obtained as follows:

[0019]

[0020] Furthermore, the estimation of the transmission line model under different meteorological conditions in step 5 is to obtain the sag equation and stress value of the transmission line under the current state, combine the curve model equation, consider the influence of the conductor load on the micrometeorological conditions, and estimate the transmission line sag model under different micrometeorological conditions;

[0021] Based on the relationship between stress calculation and sag simulation parameters under different natural factors, the overhead transmission line equation is obtained as follows:

[0022]

[0023] Where: σ m and σ n are the horizontal stress of conductor sag under two different natural conditions; γ m and γ n are the power line load ratios under two different natural conditions; t m and t n are the temperatures of the current-carrying conductor under two natural conditions respectively; l is the distance of the target gear where the conductor is located; α is the temperature expansion coefficient of the power line; E is the expansion coefficient of the power line.

[0024] Furthermore, in step 6, the transmission line dancing ellipsoid model is established to determine whether the phase distance exceeds the limit. This is done by combining the transmission line sag model under the estimated micro-meteorological state, considering the influence of wind excitation, and establishing the transmission line ellipsoid dancing trajectory.

[0025] Furthermore, the establishment of the transmission line ellipsoidal dancing trajectory is achieved by dancing around the line connecting the two towers as the axis, each dancing plane is an ellipse, and the overall dancing trajectory is an ellipsoid. The dancing trajectory equation is:

[0026]

[0027] Where l is the distance between the two towers, b is the sag value, x is the horizontal coordinate, y is the vertical coordinate, and z is the coordinate perpendicular to the xoy plane.

[0028] Furthermore, the calculation method can determine whether the phase-to-phase distance exceeds the limit based on the sag model under the estimated micro-meteorological conditions when the transmission line is covered with ice, resulting in different icing conditions for different phases of the same span, thereby achieving the purpose of early warning.

[0029] The point cloud data collected by the airborne radar after flight is used to fit the curve model of the ground wire;

[0030] The curve model equations after fitting are:

[0031] Ground line equation:

[0032] Wire equation:

[0033] The calculated stress of the ground conductor is σ0 and the specific load is γ;

[0034] The heat generated by the conductors causes the ground wire to be more heavily iced than the conductors. Assuming the ground wire ice thickness is d1mm and the conductor ice thickness is d2mm, the power line curve model equations under this state are calculated as follows:

[0035] Ground line equation:

[0036] Wire equation:

[0037] The ground stress is obtained as σ0′, and the specific load is γ′; the conductor stress is obtained as σ0″, and the specific load is γ″;

[0038] At this time, the distance between the ground conductors in the ice-covered state is smaller than that in the un-ice-covered state. When dancing occurs due to wind excitation, the phase-to-phase distance is too close, which is prone to flashover tripping.

[0039] Furthermore, the calculation method can be used to determine if different phases of the same transmission line have different ice coverage conditions when ice is applied to them. This can lead to inconsistent swing amplitudes due to wind excitation, resulting in close interphase distances and flashover tripping. Based on the predicted micrometeorological conditions, the conductor ellipsoidal swing trajectory is established to determine whether the interphase distance exceeds the limit, thereby achieving early warning.

[0040] The sag equations of the transmission line under this icing state are:

[0041] Ground wire sag equation:

[0042] Conductor sag equation:

[0043] The sag of the transmission line changes after ice covering. The thicker the ice, the greater the sag. According to the sag formula, a rotating ellipsoid model is established with the line connecting the tops of the two towers as the axis. The ellipsoid equations are:

[0044] Geodesic ellipsoid equation:

[0045] Among them, b1 is the sag curve model equation of the ground wire;

[0046] Wire ellipsoid equation:

[0047] Among them, b2 is the sag curve model equation of the conductor;

[0048] In the dancing trajectory under wind excitation under current meteorological conditions, the dancing ellipsoid model of the ground wire affected by wind excitation when the ice coverage is d1mm and the dancing ellipsoid model of the ground wire affected by wind excitation when the ice coverage is d2mm are obtained. The two ellipsoid models are compared to determine whether the phase-to-phase distance exceeds the limit; if it exceeds the limit, a flashover tripping accident will occur.

[0049] A computer storage medium stores a computer program, which, when executed by a processor, implements the steps of a calculation method for preventing power transmission line galloping.

[0050] The present invention has the following beneficial effects and advantages:

[0051] The present invention can obtain the sag of the transmission line in a timely manner under adverse weather conditions when the sag shape of the transmission line cannot be obtained. The transmission line parameters collected in the past are combined with micro-meteorological information and line parameters, and a power line dancing trajectory model is established according to the sag shape. The real-time monitoring of the transmission line dancing can be realized, and it can be judged in real time whether the phase-to-phase distance of the transmission line exceeds the limit and whether there is a hidden danger of phase-to-phase flashover tripping, so as to achieve the purpose of early warning and effectively maintain the stable operation of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0053] Figure 1 This is a circuit stress analysis diagram of the present invention;

[0054] Figure 2 It is the dancing ellipsoid diagram of the present invention;

[0055] Figure 3 It is a data processing flow chart of the present invention;

[0056] Figure 4 The present invention is a ground conductor morphology curve diagram in ice-covered state and non-ice-covered state;

[0057] Figure 5 This is a diagram showing the sag of the ground conductor after ice coating according to the present invention;

[0058] Figure 6 This is the ellipsoid diagram of the ground line dancing under the influence of wind excitation when the ice coverage is 30mm;

[0059] Figure 7 This is the ellipsoid diagram of the ground line dancing under the influence of wind excitation when the ice coverage is 25 mm. DETAILED DESCRIPTION

[0060] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein may be combined with each other.

[0061] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0062] Refer to the following Figure 1-Figure 7 Describe the technical solutions of some embodiments of the present invention.

[0063] Example 1

[0064] The present invention provides an embodiment, which is a calculation method for preventing transmission line galloping, specifically comprising the following steps:

[0065] Step 1. Obtain the transmission line morphology under current conditions.

[0066] Specifically, the coordinates of the transmission lines are collected through laser point cloud equipment. First, the laser equipment is used to scan the power corridor to obtain the three-dimensional point cloud data of the power lines. Then, the collected discrete power line point cloud data is fitted to fit a curve, the curve equation is calculated, and the micrometeorological information when the point cloud data is obtained is recorded.

[0067] Step 2. Fit the curve model equation according to the discrete power line point cloud data based on the transmission line morphology.

[0068] Establish an XOZ coordinate system with a plane perpendicular to the ground and solve the curve model equation.

[0069] The XOZ coordinate system is specifically established with the span line of the two towers as the X axis and the elevation as the Z axis. The curve model equation is solved in the XOZ coordinate plane, such as Figure 1 As shown, Figure 1 This is the line force analysis diagram of the present invention. For the conductor force analysis, the curve model equation is solved as follows:

[0070]

[0071] Among them, C1 and C2 are the coefficients of the belt, σ0 is the stress value, γ is the conductor load ratio, and the curve model equation is a two-dimensional catenary model. x is the horizontal coordinate value of any point on the fitting curve, and z is the sag vertical coordinate value.

[0072] Step 3. According to the curve model equation, calculate the stress value of the transmission line in the current state.

[0073] Step 4. Calculate the transmission line sag equation using the curve model equation.

[0074] Specifically, the sag model of the transmission line in the current state is solved according to the curve model equation, and the sag equation formula is obtained as follows:

[0075]

[0076] Step 5. Estimate the transmission line model under different meteorological conditions.

[0077] After obtaining the sag equation and stress value of the transmission line under the current state, combined with the curve model equation, considering the influence of micro-meteorological load on the conductor, the sag model of the power transmission line under different micro-meteorological conditions is estimated.

[0078] Based on the relationship between stress calculation and sag simulation parameters under different natural factors, the overhead transmission line equation is obtained as follows:

[0079]

[0080] Where: σ m and σ n are the horizontal stress of conductor sag under two different natural conditions; γ m and γ n are the power line load ratios under two different natural conditions; t m and t n are the temperatures of the current-carrying conductor under two natural conditions respectively; l is the distance of the target gear where the conductor is located; α is the temperature expansion coefficient of the power line; E is the expansion coefficient of the power line.

[0081] Step 6. Establish a dancing ellipsoid model of the transmission line to determine whether the phase-to-phase distance exceeds the limit.

[0082] Specifically, the sag model of power transmission lines under the estimated micro-meteorological conditions is combined with the influence of wind excitation to establish the ellipsoidal dancing trajectory of the transmission line.

[0083] The dancing is centered around the line connecting the two towers. Each dancing plane is an ellipse, and the overall dancing trajectory is an ellipsoid. Figure 2 As shown, Figure 2 It is the dancing ellipsoid diagram of the present invention.

[0084] The dancing trajectory equation is:

[0085]

[0086] Where l is the distance between the two towers, b is the sag value, x is the horizontal coordinate, y is the vertical coordinate, and z is the coordinate perpendicular to the xoy plane.

[0087] like Figure 3 As shown, Figure 3 It is a data processing flow chart of the present invention.

[0088] Example 2

[0089] The present invention provides another embodiment, which is a calculation method for preventing transmission line galloping.

[0090] When transmission lines are iced, different phases of the same span may experience different ice coverage conditions, leading to changes in sag. Based on the sag model under the estimated micro-meteorological conditions, it is determined whether the phase distance exceeds the limit, thereby achieving the purpose of early warning.

[0091] The point cloud data collected by the airborne radar after flight is used to fit the curve model of the ground wire;

[0092] The curve model equations after fitting are:

[0093] Ground line equation:

[0094] Wire equation:

[0095] The calculated stress of the ground conductor is σ0 and the specific load is γ;

[0096] The heat generated by the conductors causes the ground wire to be more heavily iced than the conductors. Assuming the ground wire ice thickness is d1mm and the conductor ice thickness is d2mm, the power line curve model equations under this state are calculated as follows:

[0097] Ground line equation:

[0098] Wire equation:

[0099] The ground stress is obtained as σ0′, and the specific load is γ′; the conductor stress is obtained as σ0″, and the specific load is γ″;

[0100] At this time, the distance between the ground conductors in the ice-covered state is smaller than that in the un-ice-covered state. When dancing occurs due to wind excitation, the phase-to-phase distance is too close, which is prone to flashover tripping.

[0101] Example 3

[0102] The present invention provides another embodiment, which is a calculation method for preventing transmission line galloping.

[0103] When transmission lines are iced, different phases within the same span experience varying ice coverage, leading to varying sag conditions. Influenced by wind, the sag amplitudes can be inconsistent, causing phase-to-phase distances to become too close and causing flashover tripping. Therefore, based on a sag model estimated under micrometeorological conditions, a conductor ellipsoidal sag trajectory is established to determine whether the phase-to-phase distance exceeds the limit, thereby providing early warning.

[0104] The point cloud data collected by the airborne radar after flight is used to perform curve fitting on the ground conductor. The catenary equations after fitting are:

[0105] Ground line equation:

[0106] Wire equation:

[0107] It can be obtained that the stress of the ground conductor is σ0=39.64MPa and the load ratio is γ=0.031.

[0108] Due to the heat generated by the conductors, the ice thickness of the ground wire will be more serious than that of the conductors. Therefore, this paper assumes that the ice thickness of the ground wire is 30 mm and the ice thickness of the conductor is 25 mm. The calculated catenary equation models of the power line under this state are:

[0109] Ground line equation:

[0110] Wire equation:

[0111] It can be obtained that the ground wire stress is σ0=145.0968MPa, and the specific load is γ=0.164; the conductor stress is σ0=111.5213MPa, and the specific load is γ=0.1097.

[0112] Example 4

[0113] The present invention provides another embodiment, which is a calculation method for preventing transmission line galloping.

[0114] When ice covers transmission lines, different phases of the same span may experience different ice coverage. Affected by wind excitation, the dancing amplitudes are inconsistent, resulting in close distances between phases and flashover tripping. Based on the estimated micrometeorological conditions, the conductor ellipsoid dancing trajectory is established to determine whether the phase distance exceeds the limit, thereby achieving the purpose of early warning.

[0115] The sag equations of the transmission line under this icing state are:

[0116] Ground wire sag equation:

[0117] Conductor sag equation:

[0118] The sag of the transmission line changes after ice covering. The thicker the ice, the greater the sag. According to the sag formula, a rotating ellipsoid model is established with the line connecting the tops of the two towers as the axis. The ellipsoid equations are:

[0119] Geodesic ellipsoid equation:

[0120] Among them, b1 is the sag curve model equation of the ground wire;

[0121] Wire ellipsoid equation:

[0122] Among them, b2 is the sag curve model equation of the conductor;

[0123] In the dancing trajectory under wind excitation under current meteorological conditions, the dancing ellipsoid model of the ground wire affected by wind excitation when the ice coverage is d1mm and the dancing ellipsoid model of the ground wire affected by wind excitation when the ice coverage is d2mm are obtained. The two ellipsoid models are compared to determine whether the phase-to-phase distance exceeds the limit; if it exceeds the limit, a flashover tripping accident will occur.

[0124] Example 5

[0125] The present invention provides another embodiment, which is a calculation method for preventing transmission line galloping.

[0126] At this time, the electric lines are shaped like Figure 4 As shown, Figure 4 The graph shows the ground conductor configuration in ice-covered and un-ice-covered conditions. As can be seen from the graph, the ground conductor spacing in the ice-covered state is smaller than in the un-ice-covered state. When wind-induced dancing occurs, the phase spacing is too close, making flashover and tripping more likely.

[0127] The sag equations of the transmission line under this icing state are:

[0128] Ground wire sag equation:

[0129] Conductor sag equation:

[0130] The sag of the transmission line changes after ice covering. The thicker the ice, the greater the sag. Figure 5 As shown, Figure 5 This is a diagram of the sag of the ground conductor after ice coating in the present invention. Based on the sag formula, a rotating ellipsoid model can be established with the line connecting the tops of the two towers as the axis. The ellipsoid equations are:

[0131] Geodesic ellipsoid equation: b1=-0.000565y 2 +0.10693y-0.03

[0132] Wire ellipsoid equation: b2=-0.0004918y 2 +0.0923y-0.0314

[0133] The dancing trajectory excited by the wind under current meteorological conditions, such as Figure 6 As shown, Figure 6 This is the ellipsoid diagram of the ground line dancing under the influence of wind excitation when the ice coverage is 30mm. Figure 7 As shown, Figure 7 This is the ellipsoid diagram of the ground wire dancing under wind excitation when the ice coverage is 25mm. By comparing the two ellipsoid models, it can be determined whether the phase distance exceeds the limit. If it exceeds the limit, a flashover tripping accident will occur.

[0134] Example 6

[0135] Based on the same inventive concept, an embodiment of the present invention further provides a computer storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of a calculation method for preventing transmission line galloping described in embodiment 1 or 2 are implemented.

[0136] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0137] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the steps in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0138] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0139] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0140] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered by the scope of protection of the claims of the present invention.

Claims

1. A calculation method for preventing transmission line galloping, characterized by: The following steps are involved: Step 1. Obtain the transmission line morphology under current conditions; Step 2. Fit the curve model equation according to the discrete points based on the transmission line morphology; Step 3. Calculate the stress value of the transmission line under the current state according to the curve model equation; Step 4. Calculate the transmission line sag equation using the curve model equation; Step 5. Estimate the transmission line model under different meteorological conditions; Step 6. Build a dancing ellipsoid model of the transmission line to determine whether the phase-to-phase distance exceeds the limit; The calculation method is as follows: when the transmission line is covered with ice, the ice coverage of different phases of the same span is different. Under the influence of wind excitation, the dancing amplitude is inconsistent, resulting in the phase distance being too close and the phase flashover tripping; Based on the predicted micro-meteorological conditions, the conductor ellipsoidal dancing trajectory is established to determine whether the phase distance exceeds the limit, thereby achieving the purpose of early warning. The sag equations of the transmission line under this icing state are: Ground wire sag equation: Conductor sag equation: Where x is the horizontal coordinate value of any point on the fitting curve, l is the span of the target gear where the conductor is located, γ′ is the specific load; σ'0 is the ground stress, γ″ is the specific load; σ0" is the conductor stress; The sag of the transmission line changes after ice covering. The thicker the ice, the greater the sag. According to the sag formula, a rotating ellipsoid model is established with the line connecting the tops of the two towers as the axis. The ellipsoid equations are: Geodesic ellipsoid equation: Where b1 is the sag curve model equation of the ground wire, x is the horizontal coordinate, y is the vertical coordinate, z is the coordinate perpendicular to the xoy plane, and l is the span of the target gear where the conductor is located; Wire ellipsoid equation: Wherein, b2 is the sag curve model equation of the conductor, x is the horizontal coordinate, y is the vertical coordinate, z is the coordinate perpendicular to the xoy plane, and l is the span of the target gear where the conductor is located; In the dancing trajectory under wind excitation under current meteorological conditions, the dancing ellipsoid model of the ground wire affected by wind excitation when the ice coverage is d1mm and the dancing ellipsoid model of the ground wire affected by wind excitation when the ice coverage is d2mm are obtained. The two ellipsoid models are compared to determine whether the phase-to-phase distance exceeds the limit; if it exceeds the limit, a flashover tripping accident will occur.

2. The method for calculating the anti-galloping power transmission line according to claim 1, wherein: As described in step 1, the transmission line morphology under the current conditions is obtained, a laser device is used to scan the power corridor to obtain the three-dimensional point cloud data of the power line, the collected discrete power line point cloud data is fitted to fit a curve, the curve model equation is calculated, and the micrometeorological information when the point cloud data is obtained is recorded.

3. The method for calculating the anti-galloping power transmission line according to claim 1, wherein: In step 2, the curve model equation is fitted based on the discrete points according to the transmission line morphology. The XOZ coordinate system is established with the span line between the two towers as the X-axis and the elevation as the Z-axis. The curve equation is solved in the XOZ coordinate plane. The force analysis of the conductor is performed to solve the curve model equation: Among them: C1, C2 are the coefficients to be determined, σ0 is the stress value, γ is the conductor load, the curve model equation is a two-dimensional catenary model, x is the horizontal coordinate value of any point on the fitting curve, and z is the sag vertical coordinate value.

4. The method for calculating the anti-galloping power transmission line according to claim 1, wherein: The calculation of the transmission line sag equation using the curve model equation in step 4 is to solve the transmission line sag model in the current state according to the curve model equation, and the sag equation formula is obtained as follows: Where γ is the conductor load, x is the horizontal coordinate value of any point on the fitting curve, and l is the target range of the conductor.

5. The method for calculating the anti-galloping power transmission line according to claim 1, wherein: The estimation of the transmission line model under different meteorological conditions in step 5 is to obtain the sag equation and stress value of the transmission line under the current state, combine it with the curve model equation, consider the influence of the conductor load on the micrometeorological conditions, and estimate the sag model of the transmission line under different micrometeorological conditions. Based on the relationship between the stress calculation and the sag simulation parameters under different natural factors, the overhead transmission line equation is obtained as follows: Where: σ m and σ n are the horizontal stress of conductor sag under two different natural conditions; γ m and γ n are the power line load ratios under two different natural conditions; t m and t n are the temperatures of the current-carrying conductor under two natural conditions respectively; l is the distance of the target gear where the conductor is located; α is the temperature expansion coefficient of the power line; E is the expansion coefficient of the power line.

6. The method for calculating the anti-galloping power transmission line according to claim 1, wherein: The establishment of the transmission line dancing ellipsoid model in step 6 to determine whether the phase distance exceeds the limit is based on the estimated transmission line sag model under micro-meteorological conditions, taking into account the influence of wind excitation, and establishing the transmission line ellipsoid dancing trajectory.

7. The method for calculating the anti-galloping power transmission line according to claim 6, characterized in that: The transmission line ellipsoid dancing trajectory is established by dancing around the line connecting the two towers as the axis, each dancing plane is an ellipse, and the overall dancing trajectory is an ellipsoid. The dancing trajectory equation is: Where l is the distance between the two towers, b is the sag value, x is the horizontal coordinate, y is the vertical coordinate, and z is the coordinate perpendicular to the xoy plane.

8. The method for calculating the anti-galloping power transmission line according to claim 1, characterized in that: The calculation method, when ice is applied to the transmission line, will cause different ice coverage conditions on different phases of the same span, resulting in changes in sag conditions. Based on the sag model under the estimated micro-meteorological conditions, it is determined whether the phase distance exceeds the limit, thereby achieving the purpose of early warning. The point cloud data collected by the airborne radar after flight is used to fit the curve model of the ground wire; The curve model equations after fitting are: Ground line equation: Wire equation: The calculated stress of the ground conductor is σ0 and the specific load is γ; The heat generated by the conductors causes the ground wire to be more heavily iced than the conductors. Assuming the ground wire ice thickness is d1mm and the conductor ice thickness is d2mm, the power line curve model equations under this state are calculated as follows: Ground line equation: Wire equation: The ground stress is obtained as σ0′, and the specific load is γ′; the conductor stress is obtained as σ0″, and the specific load is γ″; At this time, the distance between the ground conductors in the ice-covered state is smaller than that in the un-ice-covered state. When dancing occurs due to wind excitation, the phase-to-phase distance is too close, which is prone to flashover tripping.

9. A computer storage medium, characterized by: The computer storage medium stores a computer program, and when the computer program is executed by the processor, the steps of the calculation method for preventing power transmission line galloping according to any one of claims 1 to 8 are implemented.

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