Method for predicting clearance distance between power line and adjacent structure based on dynamic mechanical model
By combining dynamic mechanical models with on-site measured data, a three-dimensional power line curve equation was established, which solved the problem of accurately predicting the clearance distance between power lines and adjacent structures, and achieved high-precision safety assessment under any weather conditions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- GUANGXI ELECTRICAL POLYTECHNIC INST
- Filing Date
- 2026-04-27
- Publication Date
- 2026-06-05
AI Technical Summary
Existing technologies cannot effectively take into account the impact of factors such as temperature, wind deflection, icing, and initial elongation on the clearance distance between power lines and adjacent structures, resulting in design deviations and inaccurate measurements. It is difficult to make accurate predictions under any future weather conditions, and manual inspections are inefficient.
A method based on dynamic mechanical models was adopted. The initial state of the model was calibrated using a single field measurement, and a three-dimensional power line curve equation was established. Taking into account the effects of sag and wind deflection, the clearance distance under any specified meteorological conditions was calculated.
It enables accurate prediction of airspace clearance under any weather conditions in the future, identifies potential safety risks, reduces engineering costs, avoids design and construction deviations, and has high precision and real-time performance.
Smart Images
Figure CN122154241A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of safety assessment technology for overhead power lines, specifically to a method for predicting the clearance distance between power lines and adjacent structures based on a dynamic mechanical model. It is particularly applicable to the assessment of clearance distances between overhead confluence lines, between overhead lines and wind turbine blades, and between wind farm transmission lines and other lines or ground features in wind farms. Background Technology
[0002] The clearance distance is a key indicator for ensuring the safe operation of overhead power lines. Insufficient clearance can easily lead to discharge accidents, seriously threatening the safe production of power energy.
[0003] For safety management of clearance distances near power lines, existing technologies typically employ the following methods:
[0004] 1. During the design phase, engineers conduct site surveys, design work, and verification calculations.
[0005] 2. During the commissioning and acceptance phase of the project, verification is carried out through measurement.
[0006] 3. Regular manual inspections and measurement monitoring.
[0007] However, the above-mentioned technical methods have the following shortcomings:
[0008] First, the verification calculations performed during the design phase rely on design parameters, while the geometric and physical parameters after actual construction often deviate from the design scheme. This deviation is especially true when power lines and adjacent structures are constructed by different entities in succession, which may result in the actual clearance distance being less than the design value, posing a safety hazard.
[0009] Second, the measurement verification conducted during the commissioning and acceptance phase of the project is usually completed under specific meteorological conditions, which are not the most unfavorable operating conditions with the minimum clearance. Due to the characteristics of power lines such as thermal expansion and contraction, wind deflection, and increased sag caused by plastic elongation and creep elongation (collectively referred to as initial elongation), their clearance is affected by multiple factors such as temperature, wind speed, icing, and initial elongation. Therefore, the measurement values at the time of acceptance cannot characterize the minimum clearance in the long-term operation.
[0010] Third, manual periodic inspections and measurement monitoring methods suffer from high labor costs, low efficiency, and lack of real-time capability, making it difficult to meet the needs of modern power grid safety operation and maintenance.
[0011] Therefore, there is a lack of existing technologies that can comprehensively consider the coupled effects of multiple factors such as temperature, wind deflection, icing, and initial elongation to accurately predict the clearance distance between power lines and nearby structures under any future weather conditions. Summary of the Invention
[0012] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a method for predicting the clearance distance between power lines and adjacent structures based on a dynamic mechanical model. This method is based on a power line mechanical model, calibrates the initial state of the model using field measurement data, and then extrapolates and predicts the minimum clearance distance under any specified weather conditions, providing a basis for the safety assessment of clearance distances for overhead power lines.
[0013] To achieve the above objectives, the present invention adopts the following technical solution:
[0014] A method for predicting the clearance distance between power lines and adjacent structures based on a dynamic mechanical model includes the following steps:
[0015] Step S1: Obtain basic data. Obtain the physical parameters of the power line, a list of typical meteorological conditions that the power line may experience, measure the span of each section of the tension section where the adjacent span is located, the sag and elevation difference angle of the power line in the adjacent span, the coordinates of the suspension point of the power line in the adjacent span, the coordinates of the sensitive points of the adjacent structures, and measure the meteorological parameters of the daily working conditions: temperature, wind speed, and icing thickness.
[0016] Step S2: Back-calculate the stress under the measured daily operating conditions. Using the sag of the electric field lines on the measured day, the stress of the electric field lines under the measured daily operating conditions is back-calculated using the formula for the sag of a sloping parabola. .
[0017] Step S3: Calculate the stress under the desired working condition. Based on the measured daily working condition stress... By using the electric line state equation, combined with the comprehensive specific load of the measured day's operating condition and the comprehensive specific load of the operating condition to be determined, the electric line stress under the operating condition to be determined is obtained. .
[0018] Step S4: Establish a three-dimensional model of the power line curve. Based on the theory of oblique parabolic curves, establish a three-dimensional spatial curve equation for the power line that simultaneously considers the effects of sag and wind deflection.
[0019] Step S5: Calculate the clearance distance. The discrete power line curve is a lattice. Sensitive points are selected from nearby structures. The Euclidean distance between the points is calculated, and the minimum value is selected as the clearance distance for the working condition to be determined.
[0020] Furthermore, the formula for the oblique parabola in step S2 is: , To measure the actual sag under daily operating conditions; To measure the comprehensive load of power lines under daily operating conditions, only the power line self-weight load is considered when there is no wind or ice. To observe the distance between the gears; The elevation difference angle between the two suspension points at both ends of the power line is observed.
[0021] Furthermore, the electric field line state equation in step S3 is: , To measure the stress on power lines under daily operating conditions; To measure the combined specific load of power lines under daily operating conditions; To measure the daily operating temperature; The combined load ratio of the power line under the required operating conditions; The desired operating temperature; This represents the span of a tension section of a power line; The elastic modulus of the electric field line; is the coefficient of thermal expansion.
[0022] Furthermore, in step S3, the electric field line stress under the desired operating condition is calculated. If the power line is a line that has been in operation for 0 to 5 years, then the measured ambient temperature of the measured day will be reduced by a preset cooling compensation value to simulate the mechanical state of the power line after the initial elongation is released.
[0023] Furthermore, the curve equation in step S4 is based on the coordinates of the two suspension points of the electric field line. , and power line comprehensive load Horizontal load ratio Vertical load ratio Electric power line stress The coefficient is the power line curve model of the adjacent span, as shown below. Figure 2 As shown, the equation of the curve is as follows:
[0024] exist Figure 2 In the middle, order According to geometric relationships, we have:
[0025]
[0026]
[0027] By the theory of oblique parabolas, the arc perpendicular to point P is... :
[0028]
[0029] The equation of curve APB is:
[0030]
[0031] Curve AP2B is formed by APB after wind deflection, and according to geometric relationships:
[0032]
[0033]
[0034]
[0035] The equation of curve AP2B is:
[0036]
[0037] That is, the equation of curve AP2B is about The function, with its coefficients and parameters, can be represented by the equation:
[0038]
[0039] Furthermore, the discretization process in step S5 involves discretizing the continuous power line spatial curve into a spatial lattice with a step size of no more than 0.5 meters, and then selecting the global minimum value as the clearance distance by calculating the Euclidean distance between all pairs of points.
[0040] Furthermore, both the state equation in step S3 and the curve equation in step S4 require the input of the specific load of the working condition to be determined. The specific load calculation is related not only to wind speed but also to wind direction angle. When the adjacent structure is another power line, i.e., the two power lines intersect, such as... Figure 3 As shown, it is impossible to consider the extreme case where the wind direction is perpendicular to the line at the same time for both lines. Therefore, when the wind speed of the working condition is not zero, it is necessary to traverse the wind direction angle and execute the logic of steps S3 to S5. For each round of traversal, the corresponding specific load is calculated, and then the corresponding power line space curve is generated and the clearance distance under the current wind direction angle is calculated. The global minimum value of the calculation results under all wind direction angles is taken as the final clearance distance of the working condition.
[0041] The wind direction angle traversal process is as follows: if the wind speed is not zero in the selected operating condition, then traverse the angle between the wind direction and the reference line in steps of 10°. , For all values within the range of 0° to 360°, calculate the specific load, such as... Figure 4 As shown.
[0042] Furthermore, steps S3 to S5 are for calculating the clearance distance for a single operating condition. In order to obtain the minimum clearance distance throughout the entire life cycle of the power line, it is necessary to traverse each operating condition in the list of typical meteorological operating conditions and execute steps S3 to S5 to obtain the clearance distance corresponding to each operating condition; compare all the calculated clearance distances to determine the global minimum clearance distance and its corresponding most unfavorable meteorological operating condition.
[0043] Compared with the prior art, the beneficial effects of the present invention are as follows:
[0044] The method of this invention can predict the clearance distance under any specified meteorological conditions in the future with only one field measurement. It can effectively identify safety risks before potential dangers occur and provide a basis for decision-making to take preventive measures.
[0045] This invention establishes a three-dimensional dynamic curve model, comprehensively considering the coupling effects of sag, wind deflection, and initial elongation, and directly uses on-site measured data as the calculation benchmark. This effectively eliminates design and construction deviations, making the prediction results closer to the actual physical state of the power line and achieving higher accuracy.
[0046] The method of this invention does not require the installation of additional online monitoring hardware, is easy to implement on a general computing platform, reduces the cost and threshold of engineering applications, and facilitates promotion. Attached Figure Description
[0047] Figure 1 This is the overall flowchart of the method of the present invention.
[0048] Figure 2 This is a schematic diagram of the three-dimensional coordinate model of the electric field line in this invention.
[0049] Figure 3 This is a schematic diagram illustrating the wind direction angle analysis of the two intersecting crossing lines in this invention.
[0050] Figure 4 This is a flowchart of the wind direction angle traversal process of the present invention.
[0051] Figure 5 This is a schematic diagram of two power lines crossing each other in Embodiment 1 of the present invention.
[0052] Figure 6 This is a schematic diagram showing the proximity of a power line and a wind turbine in Embodiment 2 of the present invention. Detailed Implementation
[0053] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.
[0054] Example 1: Prediction of clearance distance when two power lines cross each other.
[0055] This embodiment describes a method for predicting the minimum clearance distance between upper line L1 and lower line L2. Figure 5 This is a schematic diagram of two power lines crossing each other.
[0056] Step S1, Obtain basic data:
[0057] S1-1 Obtaining power line physical parameters from power line design documents:
[0058] Regarding the upper line, the two lower conductors are power lines sensitive to clearance distance. Their parameters are: conductor type LGJ-300 / 40, cross-sectional area 338.99 mm². 2 It has a diameter of 23.9 mm, a single weight of 1131 kg / km, a breaking force of 92360 N, an expansion coefficient of 0.0000196 1 / ℃, and an elastic modulus of 73000 MPa.
[0059] Regarding the overhead lines, the two overhead ground wires are sensitive power lines in terms of clearance distance. Their parameters are as follows: ground wire type OPGW, cross-sectional area 97.83 mm². 2 It has a diameter of 13.2 mm, a single weight of 676 kg / km, a breaking force of 118000 N, an expansion coefficient of 0.000013 1 / ℃, and an elastic modulus of 162000 MPa.
[0060] S1-2 Obtain a list of typical meteorological conditions from the power line design documents:
[0061] High temperature is T=40, V=0, B=0; low temperature is T=-5, V=0, B=0; average annual temperature is T=20, V=0, B=0; strong wind is T=10, V=35, B=0; icing is T=-5, V=0, B=5; installation is T=15, V=0, B=0; external wind is T=10, V=10, B=0; internal wind is T=15, V=15, B=0; T is temperature in °C, V is wind speed in m / s, and B is icing thickness in mm.
[0062] The following data were measured on-site at S1-3:
[0063] To ensure measurement accuracy, the preferred daily operating conditions are windless and ice-free weather conditions. Daily operating conditions: T=5℃, V=0 m / s, B=0 mm.
[0064] Line measurement data:
[0065] The spans of adjacent tension sections are: 485, 271, 465, 415, 475, 426, 424, 350, 377, 387, 335, 397, 457, 296, in meters;
[0066] Adjacent span: sag 13.18m, span distance 465m, hanging point height difference angle 0.887°.
[0067] Coordinates of the adjacent power line connection points: left start (21277.98, 12022.53, 161.4), left end (21732.25, 11923.19, 154.2), right start (21273.48, 11998.96, 161.4), right end (21727.75, 11899.61, 154.2).
[0068] Lower line measurement data:
[0069] The spans of adjacent tension sections are: 393, 259, 376, 338, 391, 328, 298, in meters;
[0070] Adjacent span: sag 3.96m, span distance 338m, hanging point height difference angle 0.885°.
[0071] Coordinates of the adjacent power line connection points: left start (21440.95, 12160.67, 166), left end (21419.22, 11822.86, 162), right start (21422.99, 12162.01, 166), right end (21401.76, 11824.13, 162).
[0072] Step S2, back-calculate the daily working stress:
[0073] Using the formula for the sag of an oblique parabola:
[0074] Known quantities to be obtained:
[0075] : Measure the actual sag under daily operating conditions. In this example, steps S1-3 are known. The upper line is 13.18m and the lower line is 3.96m.
[0076] The combined specific load of the power line under the measured daily operating conditions is calculated from the unit weight of the power line in step S1-1 and the measured daily wind speed V in S1-3. In this example, the line load is 0.0327 N / (m·mm). 2 The downstream line is 0.0678 N / (m·mm). 2 );
[0077] : The span of the adjacent span is known in steps S1-3 of this example. The upper span is 465m and the lower span is 338m.
[0078] The elevation difference angle between the two suspension points of the adjacent power line is known in steps S1-3 of this example. The upper line is 0.887° and the lower line is 0.885°.
[0079] Substituting into the formula for an oblique parabola, we obtain: Daily electric field line stress measured on the upper line. =67.11 MPa, daily power line stress measured on the lower line =244.41 MPa.
[0080] Step S3, calculate the stress under the unknown working condition:
[0081] Taking the "high temperature" condition as the desired operating condition, the following calculations are performed:
[0082] Equations of state:
[0083] Known quantities to be obtained:
[0084] The stress on the power lines under daily operating conditions has been calculated in step S2.
[0085] The combined load ratio of the power lines under daily operating conditions has been calculated in step S2.
[0086] : Measure the daily operating temperature. Steps S1-3 are known. If the power line is a newly built line with an operation period of no more than 5 years, the effect of initial elongation needs to be considered, and a cooling compensation should be applied to the measured daily temperature. In this example, it is an old line, and the cooling value is 0℃. =5-0=5℃;
[0087] The combined load ratio of the power line under the desired operating condition is calculated from the wind speed and wind direction angle of the desired operating condition to determine the horizontal load ratio. The vertical load ratio is calculated by combining the icing thickness with the power line's self-weight. , ;
[0088] : Operating temperature to be determined;
[0089] The representative span of the tension section of the power line is calculated from the spans of each tension section in steps S1-3, i.e. ;
[0090] , The elastic coefficient and thermal expansion coefficient of the electric field line can be obtained from the physical parameters of the electric field line in step S1-1.
[0091] Solving the state equations for the upper line yields the stress under "high temperature" conditions. =65.03 MPa;
[0092] Solving the state equations for the downstream line yields the stress under "high temperature" conditions. =234.9 MPa;
[0093] Step S4: Establish a 3D model of the power line curve:
[0094] Equation of electric field line curve:
[0095] The following are the known parameters required to construct the equation of the electric field line curve:
[0096] Hanging point coordinates: , The results were obtained from actual measurements in steps S1-3.
[0097] Power line load ratio for the required operating condition: Comprehensive load ratio Horizontal load ratio Vertical load ratio It is obtained from step S2;
[0098] Stress of power lines under the required operating conditions This has already been calculated in step S3.
[0099] In this example, see Figure 5 To generate the curve equation after wind deflection, the following parameters need to be input:
[0100] Taking the left-side power line as an example, the following parameters need to be entered: left-side start (21277.98, 12022.53, 161.4), left-side end (21732.25, 11923.19, 154.2), parameter group ( =0, =0.0327, =0.0327, =65.03).
[0101] Taking the left-side power line as an example, the following parameters need to be entered: left-side start (21440.95, 12160.67, 166), left-side end (21419.22, 11822.86, 162), parameter group ( =0, =0.0678, =0.0678, =234.9).
[0102] Step S5, calculate the clearance distance:
[0103] With a step size of 0.5 meters, i.e., the equation The variable takes values in increments of 0.5. The discrete curve equation is a point matrix, and the distance between the points is the Euclidean distance. , ={1,2,3...N}. The clearance distance between the two curves under high-temperature conditions is... =min( ).
[0104] Furthermore, following steps S3-S5 above, calculate the corresponding clearance distance for each of the following conditions: low temperature, average annual temperature, strong wind, icing, installation, external passage, and internal passage. , , , , , , In each round of traversing the operating conditions, if the wind speed in that condition is not zero, the wind direction angles from 0° to 360° need to be traversed in steps of 10°, and the minimum value among all the calculated wind direction angles is taken as the clearance distance for that operating condition.
[0105] Finally, the minimum clearance for power line crossings. =min( , , , , , , , The result in this example is: the minimum clearance distance occurred under high wind conditions, with a minimum clearance distance of 9.23m, and the location was between the upper right power line and the lower right power line, 138m from the upper right starting point.
[0106] Example 2: Prediction of the proximity clearance between power lines and wind turbines
[0107] This embodiment describes a method for predicting the clearance distance from a power line L to its nearest wind turbine.
[0108] S1-1 Obtaining power line physical parameters from power line design documents:
[0109] The overhead ground wire near the wind turbine is a power line sensitive to clearance distance. Using it as the subject of study, its parameters are: model JLB20A-100, cross-sectional area 100.88 mm². 2 It has a diameter of 13 mm, a single weight of 674.1 kg / km, a breaking force of 121660 N, an expansion coefficient of 0.000013 1 / ℃, and an elastic modulus of 147200 MPa.
[0110] S1-2 Obtain a list of typical meteorological conditions from the power line design documents:
[0111] High temperature is T=40, V=0, B=0; low temperature is T=-10, V=0, B=0; average annual temperature is T=20, V=10, B=0; strong wind is T=10, V=35, B=0; icing is T=-5, V=0, B=20; installation is T=15, V=0, B=0; external wind is T=10, V=10, B=0; internal wind is T=15, V=15, B=0; T is temperature in °C, V is wind speed in m / s, and B is icing thickness in mm.
[0112] The following data were measured on-site at S1-3:
[0113] Measurement conditions: T=15℃, V=0 m / s, B=0 mm. Measurement days should be selected in windless and ice-free weather.
[0114] Using the overhead ground wire near the wind turbine as the prediction target, the power line measurement data is as follows:
[0115] The spans of adjacent tension sections are: 270, 158, and 345, in meters.
[0116] Adjacent span: sag 2.6m, span distance 270m, hanging point height difference angle 2.33°;
[0117] Coordinates of the adjacent power line connection point: beginning (0, 3.2, 23.5), end (270, 2.5, 21.3).
[0118] With the center of the wind turbine hub as the sensitive point, the wind turbine measurement data are as follows:
[0119] The coordinates of the center O of the wind turbine hub are: (121, 36, 112).
[0120] Step S2, back-calculate the daily working stress:
[0121] Similar to Example 1, the electric line stress under the measured daily operating conditions was calculated using the parabolic curve formula. =229.87 MPa.
[0122] Step S3, calculate the stress under the unknown working condition:
[0123] Taking the "high temperature" operating condition as the desired operating condition, perform the calculation:
[0124] Similar to Example 1, the stress of the power line under the "high temperature" condition is obtained by applying the state equation to solve the problem. =216.18 MPa;
[0125] Step S4: Establish a 3D model of the power line curve:
[0126] Similar to Example 1, to generate the curve equation after wind deflection, the following parameters need to be input:
[0127] For the overhead ground wire near the wind turbine, parameters need to be entered; starting point (0, 3.2, 23.5), ending point (270, 2.5, 21.3), parameter group ( =0, =0.0655, =0.0655, =216.18).
[0128] Step S5, calculate the clearance distance:
[0129] Similar to Example 1, the discrete electric field curve equation is a lattice, and the sensitive point near the nearby structure is the center point O of the wind turbine hub. The Euclidean distance between the discrete points of the electric field curve and point O is used. , ={1,2,3...N}. The clearance between the power line and point O under high-temperature operating conditions is... =min( ).
[0130] Furthermore, following steps S3-S5 above, calculate the corresponding clearance distance for each of the following conditions: low temperature, average annual temperature, strong wind, icing, installation, external passage, and internal passage. , , , , , , .
[0131] Finally, the minimum clearance between the electric field line and the center point O of the wheel hub. =min( , , , , , , , In this example, the minimum clearance distance occurred under high wind conditions, with a minimum clearance distance of 96.75m, located 120m from the starting point of the upper left power line. Since the wind turbine blade length is 75 meters, the predicted minimum clearance distance between the power line and the turbine blade is 96.75m - 75m = 21.75m.
[0132] This invention is not limited to the preferred embodiments described above. Anyone can derive other products in various forms under the guidance of this invention. However, regardless of any changes in shape or structure, any technical solution that is the same as or similar to this application falls within the protection scope of this invention.
Claims
1. A method for predicting the clearance distance between power lines and adjacent structures based on a dynamic mechanical model, characterized in that, Includes the following steps: Step S1: Obtain basic data, which includes power line physical parameters, a list of preset typical meteorological conditions, span data of each span in the tension section where the adjacent span is located, the sag and hanging point height difference angle of the adjacent power line measured on-site under the measurement day conditions, the hanging point coordinates of the adjacent power line, the coordinates of sensitive points of adjacent structures, and the meteorological parameters of the measurement day conditions. Step S2: Based on the measured sag of the adjacent power line under the measured daily operating conditions, the power line stress under the measured daily operating conditions is calculated by back-calculating using the parabolic sag formula. ; Step S3: Based on the measured daily operating conditions, the electric line stress By using the electric line state equation, combined with the comprehensive specific load of the measured day's operating condition and the comprehensive specific load of the operating condition to be determined, the electric line stress under the operating condition to be determined is obtained. ; Step S4: Based on the electric line stress under the desired operating condition The meteorological parameters of the desired working condition and the coordinates of the adjacent power line hanging point are used to establish a three-dimensional dynamic curve model describing the spatial morphology of the power line under the desired working condition. The three-dimensional dynamic curve model simultaneously considers the effects of sag and wind deflection. Step S5: Discretize the three-dimensional dynamic curve model into a spatial point matrix, and combine it with the coordinates of the sensitive points of the adjacent structures to calculate the Euclidean distance between each point in the spatial point matrix and the sensitive point, and select the minimum value as the clearance distance under the working condition to be determined.
2. The method for predicting the clearance distance between power lines and adjacent structures based on a dynamic mechanical model according to claim 1, characterized in that, The formula for the sag of the oblique parabola in step S2 is: In the formula, To measure the actual sag under daily operating conditions, To measure the combined load ratio of power lines under daily operating conditions, To observe the distance between the gears, The elevation difference angle between the two suspension points at both ends of the power line is observed.
3. The method for predicting the clearance distance between power lines and adjacent structures based on a dynamic mechanical model according to claim 1, characterized in that, The electric field line state equation in step S3 is: In the formula, , , These are measured as power line stress, combined specific load, and temperature under daily operating conditions. , , These are the power line stress, combined specific load, and temperature under the desired operating condition; This represents the span of a tension section of a power line; The elastic modulus of the electric field line; is the coefficient of thermal expansion of the electric field line.
4. The method for predicting the clearance distance between power lines and adjacent structures based on a dynamic mechanical model according to claim 1 or 3, characterized in that, In step S3, the electric field stress under the desired operating condition is calculated. If the power line is a newly built line whose service life does not exceed the preset period, then the measured ambient temperature of the measured day's operating conditions is subtracted by a preset cooling compensation value, and then substituted into the power line state equation for solution, in order to simulate the mechanical state of the power line after the initial elongation is released.
5. The method for predicting the clearance distance between power lines and adjacent structures based on a dynamic mechanical model according to claim 1, characterized in that, The three-dimensional dynamic curve model in step S4 is established based on the theory of oblique parabolic curves, and its parametric equations are expressed in terms of variables. The specific form is as follows: ； in,( )and( ( ) represents the coordinates of two suspension points of the adjacent power line. , , These are the combined specific load, vertical specific load, and horizontal specific load of the power line under the desired operating condition. The stress on the power line is the stress under the desired operating condition.
6. The method for predicting the clearance distance between power lines and adjacent structures based on a dynamic mechanical model according to claim 1, characterized in that, The discretization process in step S5 involves discretizing the continuous three-dimensional dynamic curve model of the power line into a spatial lattice with a step size of no more than 0.5 meters.
7. The method for predicting the clearance distance between power lines and adjacent structures based on a dynamic mechanical model according to claim 1, characterized in that, When the adjacent structure is another power line, if the wind speed of the desired operating condition is not zero, then a wind direction angle traversal sub-step is introduced in steps S3 to S5: The system iterates through all values of the relative angle between the wind direction and the reference line within the range of 0° to 360° using a preset angle step size. For each angle value, it calculates the corresponding power line horizontal load ratio and comprehensive load ratio, thereby generating the corresponding three-dimensional dynamic curve model and calculating the clearance distance under the current wind direction angle. The global minimum value of the calculation results under all wind direction angles is taken as the final clearance distance for the working condition to be determined.
8. The method for predicting the clearance distance between power lines and adjacent structures based on a dynamic mechanical model according to claim 7, characterized in that, The preset angle step size is 10°.
9. The method for predicting the clearance distance between power lines and adjacent structures based on a dynamic mechanical model according to claim 1, characterized in that, The method further includes: traversing each desired condition in the preset list of typical meteorological conditions, executing steps S3 to S5 to obtain the airspace distance corresponding to each desired condition; comparing all calculated airspace distances to determine the global minimum airspace distance and its corresponding most unfavorable meteorological condition.