Early warning method, device and equipment for overhead line and medium

Abstract

The invention discloses an early warning method, device and equipment for an overhead line and a medium, and relates to the field of overhead line design, and the method comprises the steps: obtaining the longitude and latitude height information of each position point on the overhead line through Beidou equipment installed on the overhead line; calculating sag of each position point on the overhead line according to the longitude and latitude height information and a catenary curve equation of the overhead line, and determining the maximum sag; calculating the deicing jump height of the overhead line according to the maximum sag; and carrying out safety early warning according to the ice-shedding jump height. According to the invention, the sag calculation precision can be improved, and real-time early warning can be realized.

Description

Technical Field

[0001] The present application relates to the field of overhead line design, and particularly to a warning method, device, equipment and medium for overhead lines. Background Art

[0002] Overhead line de-icing is a common phenomenon in ice-covered transmission lines. Ice-covered de-icing jump means that the ice-covered conductor will produce uneven de-icing or asynchronous de-icing under the action of rising temperature, natural wind force, or artificial vibration and knocking. As the ice thickness on the conductor increases, the conductor tension increases significantly, and the conductor sag increases significantly. When a large section or the whole span de-ices, due to the rapid conversion of the elastic energy stored in the conductor into the kinetic energy and potential energy of the conductor, it causes the conductor to jump upward, reducing the distance between conductors or between the conductor and the ground wire, resulting in discharge between the conductor and the ground wire, and in severe cases, it can cause the line to trip.

[0003] Uneven ice coverage or asynchronous de-icing of adjacent span conductors will produce a tension difference, causing the conductor and the ground wire to slide in the clamp, resulting in all the outer aluminum strands of the conductor breaking at the outlet of the clamp and the steel core twitching, and in severe cases, it can cause the pole tower to collapse.

[0004] Engineers often calculate the sag of the overhead line by measuring the relevant height or angle of the overhead line, and then calculate the de-icing jump height and the phase distance between adjacent overhead lines to achieve safety warning for the overhead line. In related technologies, generally, a device with an acceleration principle sensor is installed on the overhead line, and relevant angles or data are obtained through the sensor, and then the sag of the overhead line is calculated. However, this method has the problem of low measurement accuracy, often resulting in untimely warning. Summary of the Invention

[0005] The purpose of the present application is to provide a warning method, device, equipment and medium for overhead lines, which can improve the calculation accuracy of the sag and help to achieve real-time warning.

[0006] To achieve the above purpose, the present application provides the following solutions:

[0007] In a first aspect, the present application provides a warning method for overhead lines, including:

[0008] Obtaining the longitude, latitude and altitude information of each position point on the overhead line through a Beidou device installed on the overhead line;

[0009] Calculating the sag of each position point on the overhead line according to the longitude, latitude and altitude information of each position point on the overhead line and the catenary curve equation of the overhead line;

[0010] Determining the maximum sag of the overhead line based on the sag of each position point;

[0011] Calculating the de-icing jump height of the overhead line according to the maximum sag;

[0012] Conduct safety warnings according to the de-icing jump height.

[0013] Furthermore, the warning method for the overhead line further includes:

[0014] Obtain the longitude, latitude and altitude information of each position point on two adjacent overhead lines through the Beidou device installed on the overhead line;

[0015] Calculate the phase distance between two adjacent overhead lines according to the longitude, latitude and altitude information of each position point on the two adjacent overhead lines;

[0016] Conduct safety warnings according to the phase distance.

[0017] Furthermore, the overhead line is arranged between a first tower and a second tower, and the fixing points of the overhead line on the first tower and the second tower are a first suspension point and a second suspension point respectively;

[0018] Calculate the sag of each position point on the overhead line according to the longitude, latitude and altitude information of each position point on the overhead line and the catenary curve equation of the overhead line, including:

[0019] Determine the height of the first suspension point, the height of the second suspension point and the span according to the longitude, latitude and altitude information of each position point on the overhead line; wherein, the span is the horizontal distance between the first tower and the second tower;

[0020] Determine the height difference between the first suspension point and the second suspension point according to the height of the first suspension point and the height of the second suspension point;

[0021] Calculate the sag of each position point on the overhead line according to the span, the height difference and the catenary curve equation of the overhead line.

[0022] Furthermore, the catenary curve equation is:

[0023]

[0024] wherein, (x, y) is the coordinate of any position point on the overhead line, and δ o is the stress in the horizontal direction at any position point on the overhead line, and g is the specific load on the overhead line.

[0025] Furthermore, the calculation formula for the sag is:

[0026]

[0027] wherein, f x is the sag of the position point (x, y) on the overhead line, h is the height difference between the first suspension point and the second suspension point, l is the span, and L h＝0is the line length of the overhead line between the first and second poles when the height difference is 0, and sh is the hyperbolic sine function.

[0028] Further, the calculation formula for the de-icing jump height is:

[0029]

[0030] where H c is the de-icing jump height, m is the local de-icing coefficient, and Δf is the sag difference before and after de-icing.

[0031] Further, calculating the phase distance between two adjacent overhead lines according to the longitude, latitude and height information of each position point on the two adjacent overhead lines includes:

[0032] Calculating the sag of the overhead line at the first position point according to the longitude, latitude and height information of each position point on the overhead line;

[0033] Calculating the sag of the adjacent overhead line at the second position point according to the longitude, latitude and height information of each position point on the adjacent overhead line of the overhead line; wherein, the horizontal distance from the first position point to the first pole is the same as the horizontal distance from the second position point to the first pole;

[0034] Calculating the phase distance according to the sag at the first position point and the sag at the second position point.

[0035] In a second aspect, the present application provides an early warning device for an overhead line, including:

[0036] An acquisition module, configured to acquire the longitude, latitude and height information of each position point on the overhead line through a Beidou device installed on the overhead line.

[0037] A first calculation module, configured to calculate the sag of each position point on the overhead line according to the longitude, latitude and height information of each position point on the overhead line and the catenary curve equation of the overhead line.

[0038] A confirmation module, configured to determine the maximum sag of the overhead line based on the sag of each position point.

[0039] A second calculation module, configured to calculate the de-icing jump height of the overhead line according to the maximum sag.

[0040] An early warning module, configured to perform safety early warning according to the de-icing jump height.

[0041] In a third aspect, the present application provides a computer device, including: a memory, a processor, and a computer program stored on the memory and executable on the processor, where the processor executes the computer program to implement the above-mentioned early warning method for an overhead line.

[0042] In a fourth aspect, the present application provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the warning method for overhead lines described above is implemented.

[0043] According to the specific embodiments provided by the present application, the following technical effects are disclosed:

[0044] The present application provides a warning method, device, equipment, medium and product for overhead lines. The latitude, longitude and altitude information of each position point on the overhead line is obtained by a Beidou device installed on the overhead line; the sag of each position point on the overhead line is calculated using the latitude, longitude and altitude information. High-precision measurement data can be obtained through the Beidou device. Based on this, the sag of each position point on the overhead line with high precision is calculated, greatly improving the calculation accuracy of the sag. Furthermore, the de-icing jump height is calculated to provide real-time warning for the overhead line. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0046] Figure 1 It is an application environment diagram of a warning method for overhead lines in an embodiment of the present application;

[0047] Figure 2 It is a flowchart of a warning method for overhead lines provided in an embodiment of the present application;

[0048] Figure 3 It is a schematic diagram of the catenary curve and coordinate system of an overhead line provided in an embodiment of the present application;

[0049] Figure 4 It is a schematic diagram of the shape of an overhead line when the suspension points are at different heights provided in another embodiment of the present application;

[0050] Figure 5 It is a schematic diagram of the functional modules of a warning device for overhead lines provided in another embodiment of the present application;

[0051] Figure 6 It is a schematic diagram of the structure of a computer device provided in an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0052] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0053] To make the above objects, features, and advantages of the present application more obvious and understandable, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0054] The early warning method for overhead lines provided by the embodiments of the present application can be applied to an application environment as Figure 1 shown. Among them, the terminal 102 communicates with the server 104 through a network. The data storage system can store the data that the server 104 needs to process. The data storage system can be set up separately, integrated on the server 104, or placed on the cloud or other servers. The terminal 102 can send the latitude, longitude, and altitude information of each position point on the overhead line to the server 104. After receiving the latitude, longitude, and altitude information of each position point on the overhead line, for the latitude, longitude, and altitude information of each position point on the overhead line, the server 104 calculates the sag of each position point on the overhead line based on the latitude, longitude, and altitude information of each position point on the overhead line and the catenary curve equation of the overhead line, and determines the maximum sag of the overhead line; calculates the de-icing jump height of the overhead line according to the maximum sag; and performs safety early warning according to the de-icing jump height. The server 104 can feedback the obtained de-icing jump height to the terminal 102. In addition, in some embodiments, the early warning method for overhead lines can also be implemented by the server 104 or the terminal 102 alone. For example, the terminal 102 can directly process the latitude, longitude, and altitude information of each position point on the overhead line, or the server 104 can obtain the latitude, longitude, and altitude information of each position point on the overhead line from the data storage system and process the latitude, longitude, and altitude information of each position point on the overhead line.

[0055] Among them, the terminal 102 can be, but is not limited to, various desktop computers, laptop computers, smart phones, and tablet computers. The server 104 can be implemented by an independent server or a server cluster composed of multiple servers, and can also be a cloud server.

[0056] In an exemplary embodiment, as Figure 2 shown, a method for early warning of overhead lines is provided. This method is executed by a computer device, and can be specifically executed by a computer device such as a terminal or a server alone, or jointly executed by a terminal and a server. In the embodiments of the present application, this method is applied to Figure 1Taking the server 104 in [the context] as an example, the following steps 201 to 205 are included. Among them:

[0057] Step 201, obtain the longitude, latitude, and altitude information of each position point on the overhead line through the Beidou device installed on the overhead line.

[0058] Step 202, calculate the sag of each position point on the overhead line according to the longitude, latitude, and altitude information of each position point on the overhead line and the catenary curve equation of the overhead line.

[0059] In an exemplary embodiment, the overhead line is arranged between the first tower and the second tower, and the fixed points of the overhead line on the first tower and the second tower are the first suspension point and the second suspension point respectively. Then step 202 includes steps 21 - 23:

[0060] Step 21, determine the height of the first suspension point, the height of the second suspension point, and the span according to the longitude, latitude, and altitude information of each position point on the overhead line; wherein, the span is the horizontal distance between the first tower and the second tower.

[0061] Specifically, the longitude, latitude, and altitude information includes longitude information, latitude information, and altitude information. The position points where the Beidou device is installed are the first suspension point and the second suspension point. According to the latitude information of the first suspension point and the latitude information of the second suspension point, determine the horizontal distance between the first suspension point and the second suspension point, that is, the horizontal distance between the first tower and the second tower, namely the span.

[0062] Step 22, determine the height difference between the first suspension point and the second suspension point according to the height of the first suspension point and the height of the second suspension point.

[0063] Specifically, determine the height of the first suspension point and the height of the second suspension point respectively according to the height information of the first suspension point and the height information of the second suspension point.

[0064] Step 23, calculate the sag of each position point on the overhead line according to the span, the height difference, and the catenary curve equation of the overhead line.

[0065] The overhead line is suspended between the first tower and the second tower and is in a balanced state under its own weight. Assume that the load per unit length and unit cross-section on the overhead line is the specific load g. Then the overhead line has a certain sag between the first tower and the second tower. Take the lowest point on the overhead line as the coordinate origin, and any section of the overhead line with a length of L X .

[0066] As Figure 3 shown, assume that the stress in the horizontal direction of the overhead line is δ o , and the cross-sectional area of the overhead line is S. Then the tensile force in the horizontal direction of the overhead line is T 0= δ o × S. The axial tension on the overhead line is T x , and the angle with the horizontal direction is α. Then, within a section of length L X , from the force balance condition of the overhead line, we get:

[0067] T x cosα = T 0 = δ o × S(1);

[0068] T x sinα = g × L X × S(2);

[0069] By comparing the above two equations, we get:

[0070]

[0071] Formula (3) is the differential equation of the catenary curve. Differentiating formula (3) with respect to x gives:

[0072]

[0073] In differential calculus, the arc length differential formula is:

[0074] dS 2 = (dx) 2 + (dy) 2 (5);

[0075] After transposing and rearranging formula (4), and integrating both ends, we get:

[0076]

[0077] Performing separation of variables integration on formula (6) again, referring to the integration formula, we have:

[0078]

[0079] Performing separation of variables integration again, we get:

[0080]

[0081] Therefore, the ordinate of any point C on the overhead line is:

[0082]

[0083] Formula (10) is the general form of the catenary curve equation, where C 1 and C 2is an integration constant, and its value can be determined according to the position of the coordinate origin and the initial conditions. If the coordinate origin is at the lowest point of the overhead conductor, the following initial conditions are available: x = 0, dy / dx = tanα = 0; substituting the initial conditions into Equation (8), then C 1 = 0. Substituting x = 0, y = 0, and C 1 = 0 into Equation (10), In this way, the catenary curve equation at the lowest point of the coordinate origin is obtained as follows:

[0084]

[0085] where (x, y) are the coordinates of any position point on the overhead line, δ o is the stress in the horizontal direction at any position point on the overhead line, and g is the specific load on the overhead line.

[0086] In addition, the catenary curve equation can also be derived in another way, and the derivation result is also Formula (11). Therefore, the coordinate origin where the catenary curve equation is located can be any point on the overhead line.

[0087] As Figure 4 shown, the coordinates of the first suspension point A are (x A , y A ) and the coordinates of the second suspension point B are (x B , y B ). The height difference between the first suspension point A and the second suspension point B is h. The calculation formula for the sag of any position point (x, y) in the overhead line AB is:

[0088] f x = y B - y x - h x (12);

[0089] h = y B - y A (13);

[0090]

[0091] where f x is the sag of the position point (x, y).

[0092] According to the position point where O is located, when x = a substituting it into Formula (8) gives C 1 = -a; when x = 0, y = 0. Substituting x = 0, y = 0, and C 1 = -a into Formula (10), we get when x = l, y = h. Substituting the above three boundary conditions into Formula (10) together, we obtain:

[0093]

[0094] The projections a and b from the lowest point of the conductor to the first suspension point and the second suspension point perpendicular to the load direction, respectively, solved from Equation (14) are as follows:

[0095]

[0096] wherein, L h＝0 is the length of the overhead line in the lower span where the first suspension point and the second suspension point are at the same height, l is the span, and h is the height difference. When the first suspension point is higher than the second suspension point, h is negative; otherwise, h is positive.

[0097] On the overhead line, the height difference between the first suspension point and the second suspension point is only a few per thousand of the span length. The span is generally several hundred meters. In engineering, to avoid the operation of hyperbolic functions, the approximate formulas of Equation (15) and Equation (16) are commonly used. When h / l << 1, take sh -1 (h / L h＝0 ) ≈ hcosβ / l, and substituting it into Equation (15) and Equation (16) to obtain the approximate formulas for a and b:

[0098]

[0099] When Equation (17) and Equation (18) are applied in engineering, compared with Equation (15) and Equation (16), the error is generally within the range of ±5%.

[0100] Substitute the above integration constant C 1 = -a, and the formula for calculating the value of a in Equation (15) into Equation (10) together, and the catenary curve equation of the overhead line with the coordinate origin at the first suspension point on the left can be obtained as:

[0101]

[0102] According to Equation (19), the sag at any position point on the overhead line can be written as:

[0103]

[0104] wherein, f x is the sag at the position point (x, y) on the overhead line, and sh is the hyperbolic sine function.

[0105] Step 203: Determine the maximum sag of the overhead line based on the sags of each of the position points.

[0106] The maximum sag of the overhead line within the span is the maximum value among the sags of each position point within a certain span. Therefore, the position point of the maximum sag should be located At this point, the derivative of formula (20) with respect to x is taken and set to zero to obtain the horizontal distance x from the position point of the maximum sag to the first suspension point. M .

[0107]

[0108] Substitute the formula for the value of a in formula (15) into formula (21) and solve to obtain:

[0109]

[0110] Substitute x in formula (22) M into formula (20) and calculate to obtain:

[0111]

[0112] Step 204: Calculate the de-icing jump height of the overhead line according to the maximum sag.

[0113] In an exemplary embodiment, the de-icing jump height of the overhead line is calculated and the de-icing jump check is performed mainly under the following three conditions, and then the tower with a large longitudinal unbalanced tension is reinforced according to the de-icing jump height to prevent the tower from collapsing.

[0114] ① The ground elevation difference between adjacent towers is greater than 50 meters.

[0115] ② The span difference on both sides of the tower is more than 2.5 times.

[0116] ③ The span is greater than 500 meters.

[0117] For a single overhead line, the de-icing jump check is usually carried out according to 100% de-icing of the overhead line. For a bundled overhead line, in a light ice area, the line is usually de-iced by 50%, and in a medium and heavy ice area, the line is usually de-iced by 50% - 70% for the de-icing jump check. When calculating the tower strength, in order to obtain the maximum unbalanced tension of the de-icing jump, it is usually calculated according to 100% de-icing of the overhead line.

[0118] In order to check the dynamic approach distance of the de-icing jump, when the span is less than 1000m, the calculation formula for the de-icing jump height is:

[0119]

[0120] where H c is the de-icing jump height, m is the local de-icing coefficient, and Δf is the difference in sag before and after de-icing.

[0121] According to the test results of the de-icing jump, the value of m is as follows:

[0122] When the ice shedding rate is 50% of the designed ice coating, m = 1.35 × 0.5, and take 0.7;

[0123] When the ice shedding rate is 60% of the designed ice coating, m = 1.35 × 0.6, and take 0.8;

[0124] When the ice shedding rate is 70% of the designed ice coating, m = 1.35 × 0.7, and take 0.9;

[0125] When the ice shedding rate is greater than 70% of the designed ice coating, m takes 1.0.

[0126] Step 205, perform safety warning according to the ice shedding jump height.

[0127] Implementing the above steps 201 to 205, the present application can use the Beidou device to obtain high-precision data and then calculate the high-precision sag, improving the calculation accuracy of the sag and helping to achieve real-time warning.

[0128] In an exemplary embodiment, the warning method for the overhead line further includes steps 301 - 303:

[0129] Step 301, obtain the longitude, latitude and altitude information of each position point on two adjacent overhead lines through the Beidou device installed on the overhead line.

[0130] In this embodiment, the overhead lines are installed in an up-and-down manner, and the Beidou device obtains the longitude, latitude and altitude information of each position point on its upper and lower adjacent overhead lines.

[0131] Step 302, calculate the phase distance between two adjacent overhead lines according to the longitude, latitude and altitude information of each position point on the two adjacent overhead lines.

[0132] In an exemplary embodiment, step 302 specifically includes steps 31 - 33:

[0133] Step 31, calculate the sag of the overhead line at the first position point according to the longitude, latitude and altitude information of each position point on the overhead line.

[0134] Step 32, calculate the sag of the adjacent overhead line at the second position point according to the longitude, latitude and altitude information of each position point on the adjacent overhead line of the overhead line; wherein, the horizontal distance from the first position point to the first tower is the same as the horizontal distance from the second position point to the first tower.

[0135] Step 33, calculate the phase distance according to the sag at the first position point and the sag at the second position point.

[0136] Step 303, perform safety warning according to the phase distance.

[0137] By calculating the phase-to-phase distance between adjacent overhead lines, real-time safety warnings can be issued for them, effectively preventing the occurrence of safety accidents.

[0138] Based on the same inventive concept, an embodiment of the present application also provides a warning device for an overhead line for implementing the warning method for the overhead line involved above. The solution provided by this device to solve the problem is similar to the solution described in the above method. Therefore, the specific limitations in one or more embodiments of the warning device for the overhead line provided below can refer to the limitations on the warning method for the overhead line in the above text, and will not be repeated here.

[0139] In an exemplary embodiment, as Figure 5 shown, a warning device for an overhead line is provided, including:

[0140] An acquisition module 51, configured to acquire the longitude, latitude, and altitude information of each position point on the overhead line through a Beidou device installed on the overhead line.

[0141] A first calculation module 52, configured to calculate the sag of each position point on the overhead line according to the longitude, latitude, and altitude information of each position point on the overhead line and the catenary curve equation of the overhead line.

[0142] A confirmation module 53, configured to determine the maximum sag of the overhead line based on the sag of each of the position points.

[0143] A second calculation module 54, configured to calculate the de-icing jump height of the overhead line according to the maximum sag.

[0144] A warning module 55, configured to issue a safety warning according to the de-icing jump height.

[0145] In an exemplary embodiment, a computer device is provided. This computer device can be a server or a terminal, and its internal structure diagram can be as Figure 6As shown in the figure. The computer device includes a processor, a memory, an input / output interface (Input / Output, abbreviated as I / O), and a communication interface. Among them, the processor, the memory, and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store the longitude, latitude, and altitude information of each position point on the overhead line. The input / output interface of the computer device is used to exchange information between the processor and external devices. The communication interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, it implements a warning method for an overhead line.

[0146] Those skilled in the art can understand that Figure 6 the structure shown in the figure is only a block diagram of some structures related to the solution of this application, and does not constitute a limitation on the computer device to which the solution of this application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine some components, or have different component arrangements.

[0147] In an exemplary embodiment, a computer device is further provided, including a memory and a processor. A computer program is stored in the memory, and when the processor executes the computer program, the steps in the above method embodiments are implemented.

[0148] In an exemplary embodiment, a computer-readable storage medium is provided, storing a computer program, and when the computer program is executed by the processor, the steps in the above method embodiments are implemented.

[0149] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use, and processing of relevant data need to comply with relevant regulations.

[0150] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above methods. Among them, any reference to a memory, database, or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memories. Non-volatile memories can include read-only memory (ROM), magnetic tapes, floppy disks, flash memories, optical memories, high-density embedded non-volatile memories, resistive random-access memories (ReRAM), magnetoresistive random-access memories (MRAM), ferroelectric random-access memories (FRAM), phase change memories (PCM), graphene memories, etc. Volatile memories can include random access memories (RAM) or external cache memories, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc.

[0151] The databases involved in the embodiments provided in the present application can include at least one of relational databases and non-relational databases. Non-relational databases can include distributed databases based on blockchain, etc., without limitation. The processors involved in the embodiments provided in the present application can be general-purpose processors, central processors, graphics processors, digital signal processors, programmable logics, data processing logics based on quantum computing, etc., without limitation.

[0152] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0153] Specific examples are used in this article to elaborate on the principles and implementation manners of the present application. The descriptions of the above embodiments are only used to help understand the method and its core idea of the present application; at the same time, for those of ordinary skill in the art, according to the idea of the present application, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. An overhead line early warning method, characterized in that: The overhead line early warning method comprises: The longitude, latitude and altitude information of each location point on the overhead line is obtained through Beidou equipment installed on the overhead line; Calculating the sag of each position point on the overhead line according to the latitude and longitude information of each position point on the overhead line and the catenary curve equation of the overhead line; Determine the maximum sag of the overhead line based on the sag of each of the location points; Calculating the de-icing jump height of the overhead line according to the maximum sag; A safety warning is issued according to the de-icing jumping height.

2. The overhead line early warning method according to claim 1, characterized in that: The overhead line early warning method also includes: The longitude and latitude information of each location point on two adjacent overhead lines is obtained through Beidou equipment installed on the overhead lines; Calculate the phase distance between two adjacent overhead lines according to the latitude and longitude information of each position point on the two adjacent overhead lines; A safety warning is performed according to the phase-to-phase distance.

3. The overhead line early warning method according to claim 1, characterized in that: The overhead line is arranged between the first pole tower and the second pole tower, and the fixing points of the overhead line on the first pole tower and the second pole tower are the first suspension point and the second suspension point respectively; Calculating the sag of each position point on the overhead line according to the latitude and longitude information of each position point on the overhead line and the catenary curve equation of the overhead line includes: Determine the height of the first suspension point, the height of the second suspension point and the span according to the latitude and longitude information of each position point on the overhead line; wherein the span is the horizontal distance between the first pole tower and the second pole tower; Determining a height difference between the first suspension point and the second suspension point according to the height of the first suspension point and the height of the second suspension point; The sag of each position point on the overhead line is calculated according to the span, the height difference and the catenary curve equation of the overhead line.

4. The overhead line early warning method according to claim 1, characterized in that: The equation of the catenary curve is: Where (x, y) is the coordinate of any point on the overhead line, δ o is the horizontal stress at any point on the overhead line, and g is the specific load on the overhead line.

5. The overhead line early warning method according to claim 1, characterized in that: The calculation formula of the sag is: Among them, f x is the sag of the position point (x, y) on the overhead line, h is the height difference between the first hanging point and the second hanging point, l is the span, L h＝0 is the length of the overhead line between the first tower and the second tower when the height difference is 0, and sh is a hyperbolic sine function.

6. The overhead line early warning method according to claim 1, characterized in that: The calculation formula for the de-icing jump height is: Among them, H c is the deicing jump height, m ​​is the local deicing coefficient, and Δf is the sag difference before and after deicing.

7. The overhead line early warning method according to claim 1, characterized in that: The phase distance between two adjacent overhead lines is calculated based on the latitude and longitude information of each position point on the two adjacent overhead lines, including: Calculating the sag of the overhead line at a first position point according to the latitude and longitude information of each position point on the overhead line; Calculating the sag of the adjacent overhead line at a second position point according to the latitude and longitude information of each position point on the adjacent overhead line of the overhead line; wherein the horizontal distance between the first position point and the first pole tower is the same as the horizontal distance between the second position point and the first pole tower; The phase-to-phase distance is calculated according to the sag of the first position point and the sag of the second position point.

8. An overhead line early warning device, characterized in that: The early warning device of the overhead line comprises: An acquisition module is used to obtain the latitude, longitude and altitude information of each location point on the overhead line through Beidou equipment installed on the overhead line; A first calculation module is used to calculate the sag of each position point on the overhead line according to the latitude and longitude information of each position point on the overhead line and the catenary curve equation of the overhead line; A confirmation module, configured to determine the maximum sag of the overhead line based on the sag of each of the position points; A second calculation module is used to calculate the de-icing jump height of the overhead line according to the maximum sag; The early warning module is used to issue a safety early warning according to the de-icing jumping height.

9. A computer 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 implement the overhead line early warning method according to any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the early warning method for overhead lines according to any one of claims 1 to 7 is implemented.

Images