A method and system for predicting lateral wind of a power transmission line based on a three-dimensional wind field

Abstract

The application discloses a kind of based on three-dimensional wind field transmission line lateral wind prediction method and system, belong to transmission line safety technical field, this method includes: obtaining transmission line basic information, and obtain corresponding numerical weather prediction data;Based on the interpolation calculation model of three-dimensional wind field component of transmission line basic information and construction, respectively calculate the three-dimensional wind component of forecast at transmission line height;Based on numerical weather prediction data, establish the coordinate system of transmission line and numerical weather prediction three-dimensional wind field coordination;According to the longitude and latitude of adjacent tower extracted in transmission line basic information, the transmission line section heading angle between adjacent tower is calculated;Construct lateral wind prediction model for transmission line section;In lateral wind prediction model for transmission line section, face transmission line and carry out lateral wind prediction of iteration for each forecast time and each tower.The method improves the prediction accuracy of lateral wind, effectively improves power grid operation efficiency and safety.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of power transmission line safety, and particularly relates to a power transmission line lateral wind prediction method and system based on a three-dimensional wind field. BACKGROUND

[0002] The lateral wind (i.e. wind perpendicular to the direction of the power transmission line section, also known as crosswind or lateral wind) of the power transmission line section has the most important influence on the calculation of the wind load of the overhead power transmission line. The lateral wind speed not only directly acts on the calculation of the wind load of the power transmission line, affecting the vibration and stability of the power transmission line, but also can cause damage to key equipment such as tower tilting, fracture and insulator, thereby causing power transmission interruption and system failure, and further affecting the reliable supply of power and the overall safe operation of the power grid.

[0003] When a tornado, strong convection or other weather events with strong vertical motion occur, the power transmission line breakage and tower collapse caused by the upward or downward effect of the three-dimensional wind field in the vertical direction are more serious. The main reasons are as follows: first, the vertical wind speed can cause dynamic changes of the wind load in the vertical direction, resulting in additional stress and fatigue of the power transmission line structure. Second, the severe vertical wind speed can cause changes and disturbances in the local wind field structure, affecting the distribution and direction of the horizontal wind speed, and further possibly causing the power transmission line to be subjected to uneven wind load at different positions, increasing the risk of the power transmission line structure. However, the current prediction of the lateral wind of the power transmission line section does not consider the influence of the vertical speed, which seriously restricts the accuracy of the lateral wind prediction. Therefore, it is necessary to consider the influence of the horizontal wind speed component and the vertical wind speed component in the meteorological scene with significant vertical motion, so as to obtain accurate prediction of the lateral wind of the power transmission line, i.e. to carry out prediction of the lateral wind of the power transmission line based on the three-dimensional wind field, so as to effectively improve the prediction accuracy and support the safe and stable operation of the power grid. SUMMARY

[0004] To solve the problems existing in the prior art, the present application provides a power transmission line lateral wind prediction method and system based on a three-dimensional wind field, which improves the prediction accuracy of the lateral wind, helps to reduce the structural damage and failure of the power transmission line, and effectively improves the operation efficiency and safety of the power grid.

[0005] To solve the above technical problems, the technical scheme adopted by the present application is as follows:

[0006] In a first aspect, the present application provides a power transmission line lateral wind prediction method based on a three-dimensional wind field, comprising:

[0007] obtaining power transmission line basic information and obtaining corresponding numerical weather prediction data;

[0008] Based on the interpolation calculation model of the three-dimensional wind field component constructed based on the basic information of the power transmission line, the three-dimensional wind component at the height of the power transmission line is calculated respectively;

[0009] A coordinate system is established based on the numerical weather prediction data, which coordinates the three-dimensional wind field of the power transmission line and the numerical weather prediction data;

[0010] In the coordinate system that coordinates the three-dimensional wind field of the power transmission line and the numerical weather prediction data, the horizontal wind direction and the vertical wind direction at the height of the power transmission line are calculated according to the numerical weather prediction data; and the heading angle of the power transmission line section between adjacent towers is calculated according to the longitude and latitude of the adjacent towers extracted from the basic information of the power transmission line.

[0011] Based on the three-dimensional wind component at the height of the power transmission line, the horizontal synthetic wind speed at the corresponding height is obtained; the angle between the heading of the power transmission line section and the horizontal wind direction is calculated based on the horizontal synthetic wind speed; and the lateral wind prediction model facing the power transmission line section is constructed based on the horizontal synthetic wind speed and the angle between the heading of the power transmission line section and the wind direction.

[0012] Based on the lateral wind prediction model facing the power transmission line section, the lateral wind prediction is carried out for the power transmission line in an iteration manner for each prediction time and each tower.

[0013] In a second aspect, the present application provides a power transmission line lateral wind prediction system based on a three-dimensional wind field, comprising:

[0014] An acquisition module is configured to acquire the basic information of the power transmission line and obtain corresponding numerical weather prediction data.

[0015] A model construction module is configured to calculate the three-dimensional wind component at the height of the power transmission line based on the interpolation calculation model of the three-dimensional wind field component constructed based on the basic information of the power transmission line.

[0016] A coordinate system is established based on the numerical weather prediction data, which coordinates the three-dimensional wind field of the power transmission line and the numerical weather prediction data.

[0017] In the coordinate system that coordinates the three-dimensional wind field of the power transmission line and the numerical weather prediction data, the horizontal wind direction and the vertical wind direction at the height of the power transmission line are calculated according to the numerical weather prediction data; and the heading angle of the power transmission line section between adjacent towers is calculated according to the longitude and latitude of the adjacent towers extracted from the basic information of the power transmission line.

[0018] Based on the three-dimensional wind component at the height of the power transmission line, the horizontal synthetic wind speed at the corresponding height is obtained; the angle between the heading of the power transmission line section and the horizontal wind direction is calculated based on the horizontal synthetic wind speed; and the lateral wind prediction model facing the power transmission line section is constructed based on the horizontal synthetic wind speed and the angle between the heading of the power transmission line section and the wind direction.

[0019] A prediction module is configured to perform iteration of lateral wind prediction for each forecast time and each tower based on a lateral wind prediction model for each transmission line section.

[0020] As a further improvement, the obtaining module is configured to obtain the basic information of the transmission line, including:

[0021] As a further improvement, the obtaining module is configured to obtain the basic information of the transmission line, including:

[0022] As a further improvement, the obtaining module is configured to obtain the corresponding numerical weather prediction data, including:

[0023] As a further improvement, the obtaining module is configured to obtain the corresponding numerical weather prediction data, including:

[0024] As a further improvement, the obtaining module is configured to obtain the corresponding numerical weather prediction data, including:

[0025] As a further improvement, the model construction module is configured to calculate the three-dimensional wind components at the height of the transmission line based on the basic information of the transmission line and the constructed interpolation calculation model of the three-dimensional wind field components, including:

[0026] As a further improvement, the model construction module is configured to construct the interpolation calculation model of the three-dimensional wind field components, including:

[0027]

[0028]

[0029] As a further improvement, the model construction module is configured to calculate the three-dimensional wind components at the height of the transmission line based on the interpolation calculation model and the different heights of each transmission line section, including:

[0030]

[0031] ​​​​​​​​​​​​​​the meridional wind, the zonal wind and the vertical velocity at the height of the transmission line; and the meridional wind at the height of the two known heights and the zonal wind at the height of the two known heights and the vertical velocity at the height of the two known heights and the zonal wind at the height of the two known heights and the vertical velocity at the height of the two known heights and the vertical velocity at the height of the two known heights

[0032] As a further improvement of the application, in the model building module, a coordinate system is established based on the numerical weather prediction data, which coordinates the transmission line with the numerical weather prediction three-dimensional wind field, comprising:

[0033] The coordinate system of the numerical weather prediction three-dimensional wind component: the meridional wind and the zonal wind are orthogonal, the meridional wind is the wind component along the longitude direction of the earth, the zonal wind is the wind component along the latitude direction of the earth; the vertical velocity is the wind component perpendicular to the meridional wind and the zonal wind;

[0034] Based on the coordinate system of the numerical weather prediction three-dimensional wind component, the longitude and latitude information of the transmission line tower is dropped on the three-dimensional wind component coordinate system, and it is confirmed that the longitude changes on the horizontal axis of the coordinate system, and the latitude changes on the vertical axis of the coordinate system, to establish a coordinate system that coordinates the transmission line with the numerical weather prediction wind field.

[0035] As a further improvement of the application, in the model building module, according to the predicted meridional wind, zonal wind and vertical velocity at the height of the transmission line, the corresponding three-dimensional wind direction angle is calculated, comprising:

[0036] Based on the meridional wind , the zonal wind and the vertical velocity at the height of the transmission line, the corresponding horizontal wind direction and the vertical wind direction at the height of the transmission line are calculated, specifically:

[0037]

[0038] wherein, is the arctangent function.

[0039] ​As a further improvement of the application, in the model building module, the transmission line section direction angle between adjacent towers is calculated according to the longitude and latitude of the adjacent towers extracted from the transmission line basic information, comprising:

[0040] Any transmission line section is composed of towers and The longitude and latitude coordinates of the tower are denoted as The longitude and latitude coordinates of the tower are denoted as The direction of each transmission line section is calculated based on the three-dimensional wind component coordinate system, and the direction of the transmission line section is:

[0041]

[0042] Where, is the inverse tangent function, represents the longitude change of the transmission line section, is the dimension change of the transmission line section, which is calculated from the longitude and latitude coordinates of the two towers at the ends of the transmission line section.

[0043] As a further improvement of the application, in the model building module, after calculating the transmission line section direction angle between adjacent towers, it further comprises:

[0044] Convert the horizontal wind direction angle and the transmission line section direction angle to the [0, 360] interval; introduce a four-quadrant inverse tangent function to calculate the angle:

[0045]

[0046] Where, Consider the change of the four quadrants, so that the value range of the four-quadrant inverse tangent function becomes between, by adjusting the value range and the conversion of radian and angle, the angle can fall in the interval , specifically:

[0047]

[0048] Where, The return result is in radian units, multiplied by to convert to angle.

[0049] As a further improvement of the application, in the model building module, based on the predicted three-dimensional wind component at the height of the transmission line, the horizontal synthetic wind speed at the corresponding height is obtained, comprising:

[0050] The height of the transmission line ​The meridional wind at the height of the transmission line and the zonal wind According to the orthogonality, the size of the horizontal synthetic wind speed is calculated:

[0051] .

[0052] As a further improvement of the application, in the model construction module, the angle between the transmission line segment direction and the horizontal wind direction is calculated based on the horizontal synthetic wind speed, comprising:

[0053] The horizontal wind direction angle and the transmission line segment direction angle , and the values are adjusted within the interval In the same coordinate system, the angle α between the two is calculated as:

[0054]

[0055] The angle between the two is also adjusted to the interval , specifically:

[0056] .

[0057] As a further improvement of the application, in the model construction module, the horizontal wind prediction model for the transmission line segment is constructed based on the horizontal synthetic wind speed and the angle between the transmission line direction and the wind direction, comprising:

[0058] The horizontal component of the lateral wind received by the transmission line segment is calculated based on the horizontal synthetic wind speed and the angle between the transmission line segment direction and the horizontal wind direction:

[0059]

[0060] Based on the vertical speed and the vertical wind direction at the height of the transmission line, the size of the horizontal component of the lateral wind received by the transmission line segment is calculated:

[0061]

[0062] Further, the horizontal wind speed facing the transmission line is calculated based on the three-dimensional wind component:

[0063] .

[0064] As a further improvement of the application, in the prediction module, based on the horizontal wind prediction model for the transmission line segment, the horizontal wind prediction is carried out for the transmission line in a forecast time and a tower iteration, comprising:

[0065] Based on the power transmission line section-oriented transverse wind prediction model, for each integral time step of the numerical weather prediction, and for each power transmission line section of the power transmission line, time and space double-loop iterations are carried out to calculate the transverse wind results of each integral time step and each tower iteration.

[0066] Based on the transverse wind results of each integral time step and each tower iteration, a size judgment is made with the windproof parameters of the power transmission line design, respectively, when the transverse wind is greater than the design parameters, the wind warning is issued for the power transmission line section and the integral time step.

[0067] In a third aspect, the present application provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to realize the power transmission line transverse wind prediction method based on the three-dimensional wind field.

[0068] In a fourth aspect, the present application provides a computer readable storage medium, which stores a computer program, wherein the computer program is executed by a processor to realize the power transmission line transverse wind prediction method based on the three-dimensional wind field.

[0069] In a fifth aspect, the present application provides a computer program product, which comprises computer instructions for instructing a computer to execute the power transmission line transverse wind prediction method based on the three-dimensional wind field.

[0070] The present application has the following beneficial effects compared with the prior art:

[0071] The present application proposes to calculate the meridional wind, the latitudinal wind and the vertical wind speed at the height of the power transmission line based on the three-dimensional wind field data of the numerical weather prediction, and to establish a coordinate system coordinated with the three-dimensional wind field based on the wind components, so as to carry out accurate analysis of the predicted wind direction and the direction of the power transmission line section, and finally to establish a transverse wind prediction model based on the three-dimensional wind field, and to carry out iterative calculation at each integral time step, and to issue a refined early warning of the power transmission line section and the time when the predicted transverse wind is greater than the design parameters of the power transmission line. The present application considers the three-dimensional wind field, improves the prediction accuracy of the transverse wind, not only helps to reduce the structural damage and failure of the power transmission line, but also effectively improves the operation efficiency and safety of the power grid. The present application aims to realize the accurate prediction of the transverse wind in the scene with significant vertical motion, and to provide solid technical support and protection for the safe operation and equipment protection of the power transmission line. BRIEF DESCRIPTION OF DRAWINGS

[0072] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following introduces the drawings of the related technical solutions in the embodiments of the present application or the prior art. It should be understood that the drawings in the following introduction are only for the convenience of clearly describing part of the embodiments of the technical solutions of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the premise of the drawings.

[0073] Figure 1 Route map for the power transmission line transverse wind prediction method based on three-dimensional wind field of the present application

[0074] Figure 2 Coordinate system schematic diagram based on three-dimensional wind component of numerical weather prediction

[0075] Figure 3 Coordinate system schematic diagram for coordination of power transmission line and numerical weather prediction wind field

[0076] Figure 4 Flow chart of a power transmission line transverse wind prediction method based on three-dimensional wind field provided by an embodiment of the present application

[0077] Figure 5 A power transmission line transverse wind prediction device based on three-dimensional wind field provided by the present application

[0078] Figure 6 An electronic device schematic diagram provided by the present application DETAILED DESCRIPTION

[0079] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application. For the step numbers in the following embodiments, they are only set for the convenience of description and explanation, and the order between the steps is not limited in any way, and the execution order of each step in the embodiments can be adaptively adjusted according to the understanding of those skilled in the art.

[0080] In the description of the present application, the words such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solutions.

[0081] The present application aims to solve the problem that the transverse wind of the power transmission line is difficult to accurately predict in the meteorological scene with significant vertical motion, such as Figure 1 As shown in the drawings, the first object of the present application is to provide a power transmission line transverse wind prediction method based on three-dimensional wind field, comprising:

[0082] Step 1, obtain the basic information of the transmission line and obtain the corresponding numerical weather forecast data;

[0083] Step 2, based on the basic information of the transmission line and the interpolation calculation model of the three-dimensional wind field component constructed, respectively calculate the three-dimensional wind components at the height of the transmission line;

[0084] Step 3, based on the numerical weather forecast data, establish a coordinate system coordinated with the three-dimensional wind field of the numerical weather forecast and the transmission line;

[0085] Step 4, in the coordinate system coordinated with the three-dimensional wind field of the numerical weather forecast and the transmission line, according to the numerical weather forecast data, calculate the horizontal wind direction and the vertical wind direction at the height of the transmission line; according to the longitude and latitude of the adjacent towers extracted from the basic information of the transmission line, calculate the heading angle of the transmission line section between the adjacent towers;

[0086] Step 5, based on the three-dimensional wind components at the height of the transmission line, obtain the horizontal synthetic wind speed at the corresponding height; based on the horizontal synthetic wind speed, calculate the angle between the heading of the transmission line section and the horizontal wind direction; based on the horizontal synthetic wind speed and the angle between the heading of the transmission line section and the horizontal wind direction, construct a lateral wind prediction model facing the transmission line section;

[0087] Step 6, based on the lateral wind prediction model facing the transmission line section, carry out the lateral wind prediction of the transmission line section by iteration at each forecast time and each tower.

[0088] Further, the three-dimensional wind field based transmission line lateral wind prediction method proposed by the present application respectively calculates the meridional wind, the latitudinal wind and the vertical velocity at the height of the transmission line, establishes a three-dimensional coordinate system coordinated with the numerical weather forecast wind field and the transmission line, and based on the analysis model of the horizontal wind direction, the vertical wind direction and the heading of the transmission line section in the coordinated coordinate system, the lateral wind prediction model facing the transmission line section and other key steps.

[0089] Further, in order to reduce the influence of nonlinear wind direction on the synthetic wind speed, the meridional wind, the latitudinal wind and the vertical velocity at the height of the transmission line are respectively calculated; based on the three-dimensional wind components of the numerical weather forecast, a coordinate system coordinated with the three-dimensional wind field of the numerical weather forecast and the transmission line is established; based on the established coordinated coordinate system, an analysis model of the horizontal wind direction, the vertical wind direction and the heading of the transmission line section is established; finally, a lateral wind size prediction model facing the transmission line section considering the three-dimensional wind field is established.

[0090] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0091] In combination Figure 2 The present application proposes a three-dimensional wind field based transmission line lateral wind prediction method and system, comprising the following steps:

[0092] Step 1: Obtain the basic information of the transmission line and the numerical weather prediction data. The basic information of the transmission line includes the longitude , latitude , height of the transmission line , and the like, and a matching relationship is established according to the longitude and latitude of the tower and the high-precision grid numerical weather prediction data to extract the conventional data of the numerical weather prediction at the corresponding grid point of the transmission line.

[0093] As an example, the conventional data of the numerical weather prediction at the corresponding grid point of the transmission line includes the meridional wind , zonal wind and vertical velocity at the height of 10 meters, 100 meters and 200 meters.

[0094] Further, step 1 specifically includes:

[0095] Step 1-1: Obtain the basic information of the tower of the transmission line under study. Including the longitude , latitude and height of the transmission line section .

[0096] As an example, it should be noted that the tower longitude and latitude and the transmission line section height here are actually an array because a transmission line contains multiple towers, and between two adjacent towers a transmission line section is determined. However, in order to simplify the description of the prediction model and facilitate understanding, in the present application, it is simply referred to as a variable, which should be expanded to an array structure in actual application.

[0097] Step 1-2: Extract the numerical weather prediction three-dimensional data of the transmission line section corresponding grid. Based on the grid numerical weather prediction covering the transmission line, according to the longitude and latitude information of the transmission line tower in step 1-1, the matching relationship between each transmission line section and the numerical weather prediction grid is established, and the three-dimensional data of the corresponding grid point is extracted from the numerical weather prediction result.

[0098] As an example, the numerical weather prediction model includes the meridional wind, zonal wind and vertical velocity at the height of 10 meters, 100 meters and 200 meters from the ground in the prediction of the near-surface three-dimensional wind field, which are respectively denoted as , , , , , , , and .

[0099] Further, it is also needed to be explained that the wind speed at different heights is actually an array, and the size of the array depends on the integral time step and the forecast time of the numerical weather prediction. The three-dimensional forecast data are contained in each integral time step of the numerical weather prediction. However, for the convenience of description, the three-dimensional forecast data are recorded as a variable in the present application, and in the actual application, the three-dimensional forecast data can be expanded into an array structure according to the results of the numerical weather prediction.

[0100] Step 2: respectively calculate the forecasted meridional wind, zonal wind and vertical velocity at the height of the power transmission line. The wind speed at the height of the power transmission line is obtained by interpolating the synthetic wind speed at different heights. Since the terrain where the power transmission line is located is complex, the wind speed may have multiple changes in the vertical direction, and the wind direction is a nonlinear function, so the interpolation of the synthetic wind speed may lead to misjudgment of the wind direction.

[0101] In order to solve the above problems and maintain consistency and compatibility with the numerical weather prediction data, a scheme of respectively interpolating the three-dimensional wind field components is proposed, which can not only effectively solve the change of wind speed with height, but also avoid the error caused by the interpolation of synthetic wind speed, and also ensure the accuracy of the wind direction at the height of the power transmission line.

[0102] Further, step 2 specifically includes:

[0103] Step 2-1: build an interpolation calculation model of the three-dimensional wind field components. For the accurate prediction of the transverse wind of the power transmission line, not only the size of the synthetic wind speed at the height of the power transmission line needs to be accurately predicted, but also the accurate prediction of the wind direction is needed.

[0104] Further, therefore, the various interpolation methods based on the synthetic wind speed are no longer applicable. The present application proposes a scheme of respectively interpolating the three-dimensional wind field components to obtain the three-dimensional wind components at the height of the power transmission line, which ensures the accuracy of the wind speed and the wind direction.

[0105] The present application adopts a linear interpolation method to calculate the wind components at the height of the power transmission line, as shown in formula (1):

[0106] (1)

[0107] wherein, represents the three-dimensional wind components at the height of the power transmission line, i.e. the meridional wind, the zonal wind or the vertical velocity. and are the wind components at two known heights and .

[0108] ​Step 2-2: Interpolation calculation of three-dimensional wind components at the power transmission line section. Based on the different heights of each power transmission line section, the meridional wind, zonal wind and vertical velocity at the height of the power transmission line are calculated according to the model of step 2-1, and the specific calculation is shown in formula (2):

[0109] (2)

[0110] wherein, , and are the meridional wind, zonal wind and vertical velocity at the height of the power transmission line. and are the meridional wind at two known heights and , and are the zonal wind at two known heights and , and similarly, and are the vertical velocity at two known heights and . In the present application, the known heights are 10 meters, 100 meters and 200 meters, and the corresponding meridional wind, zonal wind and vertical velocity have been obtained in step 1-2, and only the closest two known heights are selected according to the height of the power transmission line , so that the meridional wind, zonal wind and vertical velocity of the power transmission line section can be calculated by formula (2) respectively.

[0111] Step 3: Establish a coordinate system that coordinates the power transmission line and the numerical weather prediction three-dimensional wind field. In the process of facing the lateral wind prediction of the power transmission line, the analysis of multiple angles such as the direction of the power transmission line section, the wind direction at the height of the power transmission line, and the angle between the direction of the power transmission line section and the wind direction at the height of the power transmission line is involved, and the wind field of the numerical weather prediction is composed of three components of meridional wind , zonal wind and vertical velocity , and the angle of the wind direction is defined as the direction of the wind, which is not in the same coordinate system as the angle of the direction of the power transmission line.

[0112] In order to coordinate the subsequent various angle analyses and simplify the calculation, a coordinate system based on the numerical weather prediction three-dimensional wind field is proposed, so that the analysis of the related angles of the three-dimensional wind field and the power transmission line is more coordinated.

[0113] Further, step 3 specifically includes:

[0114] Step 3-1: Establish a coordinate system based on the three-dimensional wind components of the numerical weather prediction. Based on the three-dimensional wind components of the numerical weather prediction, namely the meridional wind​ , zonal wind and vertical velocity , a coordinate system is established for the calculation coordination, as follows: the meridional wind and the zonal wind are orthogonal, the meridional wind is the wind component along the longitude direction of the earth, and the zonal wind is the wind component along the latitude direction of the earth; the vertical velocity is the wind component perpendicular to the meridional wind and the zonal wind, reflecting the vertical movement of the air column in the atmosphere, and is particularly important in describing the convection process, updraft or downdraft.

[0115] Further, in order to facilitate the calculation coordination and the understanding of the application scenario, the present application stipulates that, in the three-dimensional wind component coordinate system, the wind direction is the direction of the wind (in this way, the calculation of the multiple angles involved in the crosswind is coordinated, and it is more consistent with the actual situation), the horizontal wind direction arrow points to the north as 0°, and moves clockwise, the horizontal wind direction arrow points to the east as 90°, the positive value in the vertical direction represents the upward movement, and the negative value corresponds to the downward movement, as shown in Figure 3 . It can be known from Figure 3 that when the horizontal wind direction angle , ; when the horizontal wind direction angle , ; when the vertical wind direction angle , ; when the vertical wind direction angle , and so on.

[0116] Step 3-2: Establishing a coordinate system for the coordination of the power transmission line and the numerical weather prediction wind field. Based on the three-dimensional wind component coordinate system of the numerical weather prediction established in step 3-1, the longitude and latitude information of the power transmission line tower is dropped on the three-dimensional wind component coordinate system, and it is stipulated that the longitude varies on the horizontal axis of the coordinate system, and the latitude varies on the vertical axis of the coordinate system.

[0117] Further, when the longitude and latitude of the adjacent towers of the power transmission line are used to represent the direction of the power transmission line section, the value of the longitude and latitude change of the power transmission line section and the related angle are consistent with step 3-1, as shown in Figure 4 , and it can be found from Figure 4 that the horizontal wind direction angle and the direction angle of the power transmission line section are alternate interior angles, and it can be seen that the coordinate system proposed by the present application can well unify and coordinate the wind direction and the direction of the power transmission line section, which will greatly simplify the subsequent analysis and calculation process.

[0118] Step 4: Analysis model of three-dimensional wind direction and transmission line segment direction based on the coordinated coordinate system. Based on the coordinated coordinate system specified in step 3, according to the data of zonal wind, meridional wind and vertical velocity at the height of the transmission line calculated in step 2, the corresponding three-dimensional wind direction angle is calculated. According to the longitude and latitude of the adjacent towers extracted in step 1, the direction angle of the transmission line segment between the adjacent towers is calculated, and it is ensured that the calculated angle value is in the interval [0, 360].

[0119] Further, step 4 specifically includes:

[0120] Step 4-1: Calculate the horizontal wind direction and vertical wind direction at the height of the transmission line based on the three-dimensional wind component coordinate system. Based on the zonal wind , meridional wind and vertical velocity at the height of the transmission line calculated in step 2-2, it can be known that the corresponding horizontal wind direction and vertical wind direction Figure 3 at the height of the transmission line are respectively: (3)

[0121] wherein, is the arctangent function.

[0122] Step 4-2: Calculate the direction of each transmission line segment based on the three-dimensional wind component coordinate system. Let any transmission line segment be composed of towers

[0123] and , the longitude and latitude coordinates of tower are denoted as , and the longitude and latitude coordinates of tower are denoted as . It can be known from that the direction of transmission line segment Figure 4 is: (4)

[0124] wherein, is the arctangent function,

[0125] represents the longitude change of the transmission line segment, is the dimension change of the transmission line segment, which can be calculated from the longitude and latitude coordinates of the two towers at the ends of the transmission line segment. Step 4-3: Convert the horizontal wind direction angle and the transmission line segment direction angle to the interval [0, 360].

[0126]

[0127] ​​From the calculation of the wind direction angle and the transmission line segment direction angle in steps 4-1 and 4-2, it is known that their value ranges are in In practical applications, the vertical wind direction angle just meets the demand, but the value of the horizontal wind direction angle and the transmission line segment direction angle needs to be adjusted to between, the four-quadrant inverse tangent function is introduced to calculate the angle:

[0128] (5)

[0129] wherein, The four-quadrant change is considered, so that the value range of the function is changed to between, and on this basis, by adjusting the value range and the conversion of radians and angles, the angle can fall in the interval, which is specifically shown in equation (6):

[0130] (6)

[0131] wherein, The return result of is in radians, and multiplied by will be converted into an angle.

[0132] Step 5: Establishing a horizontal wind prediction model for the transmission line segment. The zonal wind and the meridional wind at the height of the transmission line are calculated in the basic step 2 to obtain the horizontal synthetic wind speed at the height. The angle between the predicted wind direction calculated in step 4 and the transmission line segment direction is calculated and ensured to be in the [0, 180] interval. The horizontal wind prediction model is constructed based on the synthetic wind speed and the angle between the transmission line direction and the wind direction.

[0133] Further, step 5 specifically includes:

[0134] Step 5-1: Calculation of the horizontal synthetic wind speed at the height of the transmission line. The zonal wind and the meridional wind at the height of the transmission line calculated in step 2-2 can be used to calculate the size of the horizontal synthetic wind speed according to their orthogonality:

[0135] (7)

[0136] Step 5-2: Calculation of the angle between the transmission line segment direction and the horizontal wind direction. The horizontal wind direction angle and the transmission line segment direction angle are obtained from step 4, and their values are adjusted to be in the interval. In the same coordinate system, the angle a between the two can be directly calculated as:

[0137] (8)

[0138] Since both the wind direction angle and the transmission line segment heading angle are calculated clockwise from north, the included angle between the two also needs to be adjusted to in the interval, specifically:

[0139] (9)

[0140] Step 5-3: Calculation of the size of the three-dimensional transverse wind facing the transmission line. From the horizontal synthetic wind speed size and the included angle in the previous step 5-1 and step 5-2, the size of the horizontal component of the transverse wind received by the transmission line segment can be calculated:

[0141] (10)

[0142] Since the vertical velocity mainly occurs in weather conditions with strong vertical motion such as tornadoes and strong convection, it is necessary to consider the contribution of vertical velocity to the transverse wind in such scenarios. Based on the vertical velocity and the vertical wind direction at the height of the transmission line in step 2-2 and step 4-1, the size of the horizontal component of the transverse wind received by the transmission line segment can be calculated:

[0143] (11)

[0144] Thus, the transverse wind speed model facing the transmission line considering the three-dimensional wind component is obtained:

[0145] (12)

[0146] Step 6: Conduct transverse wind prediction for each forecast time and each transmission line segment. Based on the step 5 transverse wind prediction model, conduct transverse wind prediction for each forecast time and each tower iteration facing the transmission line. Compare the predicted transverse wind with the windproof parameters designed for the transmission line, and issue warning information when the transverse wind is greater than the design parameters of the transmission line segment and time.

[0147] Further, step 6 specifically includes:

[0148] Step 6-1: Transverse wind prediction for time and space double-loop iteration. Based on the step 5 transverse wind prediction model, for each integration time step of numerical weather prediction and each transmission line segment of the transmission line, conduct time and space double-loop iteration to calculate the transverse wind results for each integration time step and each tower iteration.

[0149] ​Step 6-2: Transmission line transverse wind prediction at the tower level and minute level. Based on the transverse wind results calculated in step 6-1 at each integral time step and each tower iteration, a size comparison is made with the windproof parameters of the transmission line design, and when the transverse wind is greater than the design parameters, a fine gale warning will be issued for the transmission line section and the integral time step.

[0150] It can be seen that, based on the basic information of the transmission line and the matched numerical weather prediction data, the longitudinal wind, the latitudinal wind and the vertical velocity at the height of the transmission line are calculated by linear interpolation, avoiding the nonlinear error of the wind direction calculated by the synthetic wind speed interpolation; then, based on the three-dimensional wind components at the height of the transmission line, a coordinate system coordinated with the numerical weather prediction wind field is established, and then the accurate analysis of the predicted wind direction and the orientation of the transmission line section is carried out; then, based on the analysis of the angle between the horizontal wind direction, the vertical wind direction and the orientation of the transmission line section, a transverse wind size prediction model for the transmission line section is established; finally, through the iterative calculation of each integral time step within the time limit of the numerical weather prediction, the transverse wind prediction in the prediction period is obtained by comparing with the design parameters.

[0151] Furthermore, the basic information of the transmission line and the conventional data of the numerical weather prediction are combined, and through the steps of linear interpolation of three-dimensional wind components in meteorology, definition of a coordinated coordinate system, analysis of the horizontal wind direction, the vertical wind direction and the angle between the horizontal wind direction and the vertical wind direction and the orientation of the transmission line section, a three-dimensional transverse wind prediction model for the transmission line is constructed, which solves the current technical problems and is more in line with the actual situation, and the model prediction accuracy is higher.

[0152] As shown in Figure 5 the second object of the application is to provide a transmission line transverse wind prediction system based on a three-dimensional wind field, comprising:

[0153] The acquisition module is used for acquiring the basic information of the transmission line and obtaining the corresponding numerical weather prediction data;

[0154] The model construction module is used for calculating the three-dimensional wind components at the height of the transmission line based on the basic information of the transmission line and the interpolation calculation model of the three-dimensional wind field components;

[0155] A coordinate system coordinated with the three-dimensional wind field of the numerical weather prediction is established based on the numerical weather prediction data;

[0156] In the coordinate system coordinated with the three-dimensional wind field of the numerical weather prediction, the horizontal wind direction and the vertical wind direction at the height of the transmission line are calculated according to the numerical weather prediction data; and the orientation angle of the transmission line section between the adjacent towers is calculated according to the longitude and latitude of the adjacent towers extracted from the basic information of the transmission line.

[0157] Based on the three-dimensional wind components predicted at the height of the transmission line, the horizontal composite wind speed at the corresponding height is obtained; based on the horizontal composite wind speed, the angle between the direction of the transmission line segment and the horizontal wind direction is calculated; based on the horizontal composite wind speed and the angle between the direction of the transmission line and the wind direction, a lateral wind prediction model facing the transmission line segment is constructed.

[0158] The prediction module is used to perform iterative lateral wind prediction for transmission lines at each forecast time and for each tower, based on the lateral wind prediction model for transmission line segments.

[0159] The present invention provides a transmission line lateral wind prediction system based on a three-dimensional wind field, which is based on the aforementioned transmission line lateral wind prediction method based on a three-dimensional wind field.

[0160] like Figure 6 As shown, a third objective of this invention is to provide an electronic device, including a memory 701, a processor 702, and a computer program stored in the memory 701 and executable on the processor. When the processor executes the computer program, it implements the aforementioned method for predicting transverse winds of transmission lines based on a three-dimensional wind field. The device also includes a communication interface 703 and a bus 704.

[0161] A fourth objective of this invention is to provide a computer-readable storage medium storing a computer program that, when executed by a processor, implements the aforementioned method for predicting transverse winds of transmission lines based on a three-dimensional wind field.

[0162] A fifth objective of this invention is to provide a computer program product comprising computer instructions that instruct a computer to execute the aforementioned method for predicting transverse winds of transmission lines based on a three-dimensional wind field.

[0163] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0164] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0165] The present application can take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment containing both software and hardware aspects. Furthermore, the present application can take the form of a computer program product on one or more computer-usable storage media (including, but not limited to, disk storage, RAM, ROM, optical storage etc.) embodying computer-readable program code.

[0166] The present application is described in reference to the flowchart illustrations and / or block diagrams of the methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processing machine, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart illustrations and / or block diagrams. Figure 1 one or more functions specified in one or more of the flowchart illustrations and / or block diagrams. Figure 1 means for carrying out one or more functions specified in one or more of the flowchart illustrations and / or block diagrams.

[0167] It should be apparent that the foregoing embodiments are merely exemplary of the application and are not specific limitations of the application. Modifications can be made by those skilled in the art, without departing from the spirit of the application, the scope of which is defined by the appended claims.

[0168] Finally, it should be noted that the above-mentioned embodiments are merely intended for describing the technical solutions of the present application, but not for limiting the present application. Although the present application is described in detail with reference to the above embodiments, those skilled in the art should understand that the specific implementation manners of the present application can be modified or replaced equivalently without departing from the spirit and scope of the present application, and any modification or replacement without departing from the spirit and scope of the present application should be covered within the protection scope of the claims of the present application.

Claims

1. A method for predicting transverse wind in transmission lines based on three-dimensional wind fields, characterized in that, include: Obtain basic information about power transmission lines and corresponding numerical weather forecast data; Based on the basic information of the transmission line and the interpolation calculation model of the constructed three-dimensional wind field components, the predicted three-dimensional wind components at the height of the transmission line are calculated respectively. A coordinate system was established based on numerical weather prediction data to coordinate the transmission lines with the three-dimensional wind field of numerical weather prediction. In a coordinate system that is consistent with the three-dimensional wind field of numerical weather prediction, the horizontal and vertical wind directions at the height of the transmission line are calculated based on numerical weather prediction data; the orientation angle of the transmission line segment between adjacent towers is calculated based on the latitude and longitude of adjacent towers extracted from the basic information of the transmission line. Based on the three-dimensional wind components predicted at the height of the transmission line, the horizontal composite wind speed at the corresponding height is obtained; based on the horizontal composite wind speed, the angle between the direction of the transmission line segment and the horizontal wind direction is calculated; based on the horizontal composite wind speed, the angle between the direction of the transmission line segment and the horizontal wind direction, a lateral wind prediction model facing the transmission line segment is constructed. Based on the lateral wind prediction model for transmission line segments, we conduct lateral wind prediction for transmission lines at each forecast time and each tower iteratively.

2. The method for predicting transverse wind of transmission lines based on three-dimensional wind field according to claim 1, characterized in that, The acquisition of basic information about transmission lines includes: Obtain the basic information of the transmission line towers under study, including the longitude of each tower. ,latitude and the height of the transmission line section .

3. The method for predicting transverse wind of transmission lines based on three-dimensional wind fields according to claim 1, characterized in that, The obtained corresponding numerical weather forecast data includes: Extract three-dimensional numerical weather forecast data for the grid corresponding to the transmission line segment; Based on gridded numerical weather prediction covering power transmission lines, and according to the basic information of power transmission line towers, a matching relationship between each power transmission line segment and the numerical weather prediction grid is established, and the three-dimensional data of the corresponding grid points are extracted from the numerical weather prediction results.

4. The method for predicting transverse wind of transmission lines based on three-dimensional wind field according to claim 1, characterized in that, The interpolation calculation model based on the basic information of the transmission line and the constructed three-dimensional wind field components calculates the predicted three-dimensional wind components at the height of the transmission line, including: Constructing an interpolation calculation model for three-dimensional wind field components: in, Indicates the height of the transmission line The three-dimensional wind components at a location include meridional wind, zonal wind, or vertical velocity; and Two known heights and Wind load at the location; Based on the different heights of each transmission line segment, the three-dimensional wind components at the transmission line height are calculated using an interpolation model: meridional wind, zonal wind, and vertical velocity. in, , and For the height of the transmission line Meridional wind, zonal wind, and vertical speed at the location; and Two known heights and The direction of the wind, and These are two known heights. and The zonal wind at that location and These are two known heights. and The vertical velocity at that point.

5. The method for predicting transverse wind of transmission lines based on three-dimensional wind fields according to claim 1, characterized in that, The establishment of a coordinate system based on numerical weather prediction data that is compatible with the three-dimensional wind field of numerical weather prediction for transmission lines includes: Establish a coordinate system for the three-dimensional wind components in numerical weather prediction: meridional wind and latitude wind Orthogonal, meridian wind It is the wind component along the Earth's longitude direction, zonal wind This represents the wind component along the Earth's latitude; vertical velocity. The wind components perpendicular to the meridional and zonal winds; Based on the coordinate system of the three-dimensional wind component in numerical weather prediction, the latitude and longitude information of transmission line towers is mapped onto the three-dimensional wind component coordinate system, and the longitude is confirmed. Variations on the horizontal axis of the coordinate system, latitude By varying the vertical axis of the coordinate system, a coordinate system is established that coordinates the transmission lines with the numerical weather prediction wind field.

6. The method for predicting transverse wind of transmission lines based on three-dimensional wind field according to claim 1, characterized in that, The calculation of the corresponding three-dimensional wind direction angle based on the predicted meridional wind, zonal wind, and vertical velocity at the height of the transmission line includes: Based on the height of the transmission line The direction of the wind Zonal wind and vertical velocity Calculate the horizontal wind direction at the height of the transmission line. and vertical wind direction Specifically: in, It is the arctangent function.

7. The method for predicting transverse wind of transmission lines based on three-dimensional wind field according to claim 1, characterized in that, The step of calculating the transmission line segment alignment angle between adjacent towers based on the latitude and longitude of adjacent towers extracted from the transmission line foundation information includes: Any transmission line segment It is a pole tower and Composition, tower The latitude and longitude coordinates are as follows tower The latitude and longitude coordinates are as follows The route of each transmission line segment is calculated based on a three-dimensional wind component coordinate system. The direction for: in, It is the arctangent function. This represents the change in longitude of a transmission line segment. This represents the dimensional change of a transmission line segment, calculated from the latitude and longitude coordinates of the towers at both ends of the segment.

8. The method for predicting transverse wind of transmission lines based on three-dimensional wind field according to claim 1, characterized in that, The calculation of the transmission line segment azimuth angle between adjacent towers also includes: The horizontal wind direction angle and the transmission line segment orientation angle are converted to the [0, 360] interval; a four-quadrant arctangent function is introduced. Calculate the angle: in, Considering the changes in the four quadrants, the range of the arctangent function in the four quadrants becomes... Between these, by adjusting the value range and the conversion between radians and degrees, the angle can be determined to fall within... The interval, specifically: in, The returned result is in radians, multiplied by This will then be converted into an angle.

9. The method for predicting transverse wind of transmission lines based on three-dimensional wind field according to claim 1, characterized in that, The method for obtaining the horizontal composite wind speed at the corresponding height based on the predicted three-dimensional wind components at the height of the transmission line includes: Due to the height of the transmission line The direction of the wind and latitude wind The magnitude of the horizontal composite wind speed is calculated based on orthogonality: 。 10. The method for predicting transverse wind of transmission lines based on three-dimensional wind field according to claim 1, characterized in that, The angle between the transmission line segment alignment and the horizontal wind direction, calculated based on the horizontal composite wind speed, includes: From horizontal wind angle and the angle of the transmission line segment And all values ​​were adjusted Within the interval; in the same coordinate system, calculate the included angle α between the two: Adjust the angle between the two as well. Within the interval, specifically: 。 11. The method for predicting transverse wind of transmission lines based on three-dimensional wind field according to claim 1, characterized in that, The lateral wind prediction model for transmission line segments, constructed based on the horizontal composite wind speed and the angle between the transmission line alignment and the wind direction, includes: The horizontal component of the transverse wind experienced by the transmission line segment is calculated based on the magnitude of the horizontal composite wind speed and the angle between the transmission line segment's orientation and the horizontal wind direction. Size: Vertical velocity at the height of the transmission line and vertical wind direction Calculate the horizontal component of the transverse wind experienced by the transmission line section. Size: This leads to the lateral wind speed facing the transmission line, taking into account the three-dimensional wind components. Computational model: 。 12. The method for predicting transverse wind of transmission lines based on three-dimensional wind field according to claim 1, characterized in that, The lateral wind prediction model based on transmission line segments performs iterative lateral wind prediction for each transmission line at each forecast time and each tower, including: Based on the crosswind prediction model for transmission line segments, a dual-loop iteration of time and space is carried out for each integral time step of numerical weather prediction and each transmission line segment to calculate the crosswind results for each integral time step and each tower iteration. Based on the crosswind results obtained through iterative integration time steps and tower-by-tower measurements, the magnitude of the crosswind is compared with the wind protection parameters designed for the transmission line. When the crosswind exceeds the design parameters, a gale warning is issued for the transmission line section and the integration time step.

13. A transmission line lateral wind prediction system based on a three-dimensional wind field, characterized in that, include: The acquisition module is used to acquire basic information about transmission lines and obtain corresponding numerical weather forecast data. The model building module is used to calculate the predicted three-dimensional wind components at the height of the transmission line based on the basic information of the transmission line and the constructed three-dimensional wind field component interpolation calculation model. A coordinate system was established based on numerical weather prediction data to coordinate the transmission lines with the three-dimensional wind field of numerical weather prediction. In a coordinate system that is consistent with the three-dimensional wind field of numerical weather prediction, the horizontal and vertical wind directions at the height of the transmission line are calculated based on numerical weather prediction data; the orientation angle of the transmission line segment between adjacent towers is calculated based on the latitude and longitude of adjacent towers extracted from the basic information of the transmission line. Based on the three-dimensional wind components predicted at the height of the transmission line, the horizontal composite wind speed at the corresponding height is obtained; based on the horizontal composite wind speed, the angle between the direction of the transmission line segment and the horizontal wind direction is calculated; based on the horizontal composite wind speed and the angle between the direction of the transmission line and the wind direction, a lateral wind prediction model facing the transmission line segment is constructed. The prediction module is used to perform iterative lateral wind prediction for transmission lines at each forecast time and for each tower, based on the lateral wind prediction model for transmission line segments.

14. The transmission line lateral wind prediction system based on three-dimensional wind field according to claim 13, characterized in that, The acquisition module acquires basic information about the transmission line, including: Obtain the basic information of the transmission line towers under study, including the longitude of each tower. ,latitude and the height of the transmission line section .

15. The transmission line lateral wind prediction system based on three-dimensional wind field according to claim 13, characterized in that, The acquisition module obtains the corresponding numerical weather forecast data, including: Extract three-dimensional numerical weather forecast data for the grid corresponding to the transmission line segment; Based on gridded numerical weather prediction covering power transmission lines, and according to the basic information of power transmission line towers, a matching relationship between each power transmission line segment and the numerical weather prediction grid is established, and the three-dimensional data of the corresponding grid points are extracted from the numerical weather prediction results.

16. The transmission line lateral wind prediction system based on three-dimensional wind field according to claim 13, characterized in that, In the model construction module, the interpolation calculation model based on the basic information of the transmission line and the constructed three-dimensional wind field components calculates the predicted three-dimensional wind components at the height of the transmission line, including: Constructing an interpolation calculation model for three-dimensional wind field components: in, Indicates the height of the transmission line The three-dimensional wind components at a location include meridional wind, zonal wind, or vertical velocity; and Two known heights and Wind load at the location; Based on the different heights of each transmission line segment, the three-dimensional wind components at the transmission line height are calculated using an interpolation model: meridional wind, zonal wind, and vertical velocity. in, , and For the height of the transmission line Meridional wind, zonal wind, and vertical speed at the location; and Two known heights and The direction of the wind, and These are two known heights. and The zonal wind at that location and These are two known heights. and The vertical velocity at that point.

17. The transmission line lateral wind prediction system based on three-dimensional wind field according to claim 13, characterized in that, The model building module establishes a coordinate system for transmission lines that is consistent with the three-dimensional wind field of numerical weather prediction, based on numerical weather prediction data, including: Establish a coordinate system for the three-dimensional wind components in numerical weather prediction: meridional wind and latitude wind Orthogonal, meridian wind It is the wind component along the Earth's longitude direction, zonal wind This represents the wind component along the Earth's latitude; vertical velocity. The wind components perpendicular to the meridional and zonal winds; Based on the coordinate system of the three-dimensional wind component in numerical weather prediction, the latitude and longitude information of transmission line towers is mapped onto the three-dimensional wind component coordinate system, and the longitude is confirmed. Variations on the horizontal axis of the coordinate system, latitude By varying the vertical axis of the coordinate system, a coordinate system is established that coordinates the transmission lines with the numerical weather prediction wind field.

18. The transmission line lateral wind prediction system based on three-dimensional wind field according to claim 13, characterized in that, In the model building module, based on the predicted meridional wind, zonal wind, and vertical velocity at the height of the transmission line, the corresponding three-dimensional wind direction angle is calculated, including: Based on the height of the transmission line The direction of the wind Zonal wind and vertical velocity Calculate the horizontal wind direction at the height of the transmission line. and vertical wind direction Specifically: in, It is the arctangent function.

19. The transmission line lateral wind prediction system based on three-dimensional wind field according to claim 13, characterized in that, In the model building module, based on the latitude and longitude of adjacent towers extracted from the basic information of the transmission line, the orientation angle of the transmission line segment between adjacent towers is calculated, including: Any transmission line segment It is a pole tower and Composition, tower The latitude and longitude coordinates are as follows tower The latitude and longitude coordinates are as follows The route of each transmission line segment is calculated based on a three-dimensional wind component coordinate system. The direction for: in, It is the arctangent function. This represents the change in longitude of a transmission line segment. This represents the dimensional change of a transmission line segment, calculated from the latitude and longitude coordinates of the towers at both ends of the segment.

20. The transmission line lateral wind prediction system based on three-dimensional wind field according to claim 13, characterized in that, The model building module, after calculating the directional angle of the transmission line segment between adjacent towers, also includes: The horizontal wind direction angle and the transmission line segment orientation angle are converted to the [0, 360] interval; a four-quadrant arctangent function is introduced. Calculate the angle: in, Considering the changes in the four quadrants, the range of the arctangent function in the four quadrants becomes... Between these, by adjusting the value range and the conversion between radians and degrees, the angle can be determined to fall within... The interval, specifically: in, The returned result is in radians, multiplied by This will then be converted into an angle.

21. The transmission line lateral wind prediction system based on three-dimensional wind field according to claim 13, characterized in that, In the model building module, based on the predicted three-dimensional wind components at the height of the transmission line, the horizontal composite wind speed at the corresponding height is obtained, including: Due to the height of the transmission line The direction of the wind and latitude wind The magnitude of the horizontal composite wind speed is calculated based on orthogonality: 。 22. The transmission line lateral wind prediction system based on three-dimensional wind field according to claim 13, characterized in that, The model building module calculates the angle between the transmission line segment's orientation and the horizontal wind direction based on the horizontal composite wind speed, including: From horizontal wind angle and the angle of the transmission line segment And all values ​​were adjusted Within the interval; in the same coordinate system, calculate the included angle α between the two: Adjust the angle between the two as well. Within the interval, specifically: 。 23. The transmission line lateral wind prediction system based on three-dimensional wind field according to claim 13, characterized in that, The model building module constructs a lateral wind prediction model for transmission line segments based on the horizontal composite wind speed and the angle between the transmission line alignment and the wind direction, including: The horizontal component of the transverse wind experienced by the transmission line segment is calculated based on the magnitude of the horizontal composite wind speed and the angle between the transmission line segment's orientation and the horizontal wind direction. Size: Vertical velocity at the height of the transmission line and vertical wind direction Calculate the horizontal component of the transverse wind experienced by the transmission line section. Size: This leads to the lateral wind speed facing the transmission line, taking into account the three-dimensional wind components. Computational model: 。 24. The transmission line lateral wind prediction system based on three-dimensional wind field according to claim 13, characterized in that, The prediction module, based on a transverse wind prediction model for transmission line segments, performs iterative transverse wind prediction for each prediction time and each tower along the transmission line, including: Based on the crosswind prediction model for transmission line segments, a dual-loop iteration of time and space is carried out for each integral time step of numerical weather prediction and each transmission line segment to calculate the crosswind results for each integral time step and each tower iteration. Based on the crosswind results obtained through iterative integration time steps and tower-by-tower measurements, the magnitude of the crosswind is compared with the wind protection parameters designed for the transmission line. When the crosswind exceeds the design parameters, a gale warning is issued for the transmission line section and the integration time step.

25. An electronic device, characterized in that, The method includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the method for predicting transverse winds of transmission lines based on a three-dimensional wind field as described in any one of claims 1-12.

26. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the method for predicting transverse winds of transmission lines based on a three-dimensional wind field as described in any one of claims 1-12.

27. A computer program product, the computer program product comprising computer instructions, characterized in that, The computer instructions instruct the computer to execute the method for predicting transverse winds of transmission lines based on three-dimensional wind fields as described in any one of claims 1-12.

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