Automatic calculation method and device for lightning shielding failure analogous to sunlight projection

Abstract

The present application provides a method and device for automatically calculating lightning shielding failure analogous to sunlight projection, including: collecting basic information of the pole tower to be evaluated, establishing a basic electrical geometry model of the pole tower to be evaluated; determining the coordinates of the intersection of any two strike distance circles among multiple conductors; using the straight line Z with equation to characterize the lightning lead-in incident situation; calculating the projection of each intersection on the axis, and arranging the projection intersections from large to small; obtaining the ground projection set of each conductor and ground wire at the lightning current and lightning incident angle based on the straight line Z according to each projection intersection; calculating the comprehensive projection of the ground projection set under the double integral according to the lightning current amplitude probability distribution and the lightning incident angle distribution, and calculating the shielding failure tripping rate according to the comprehensive projection. The calculation of the complex geometric structure of the electrical geometry model is avoided, and the universal calculation of the shielding failure tripping rate of different types of pole tower structures is realized by directly calculating the projection of the exposed arc.

Description

Technical Field

[0001] The present application belongs to the field of electric power technology, and in particular, relates to a method and device for automatically calculating lightning shielding failure by analogy with sunlight projection. Background Art

[0002] Lightning hazards are still the main factor that threatens line safety at all times. They are the main cause of line tripping and sudden power outages. In the past operation, they have brought huge losses to the power system and have a great impact on the stable operation of the power system. Improving the prediction accuracy of the theoretical model of lightning protection design for transmission lines, reducing lightning tripping, and improving the lightning resistance of transmission lines are key links in ensuring the reliability of the power system. Therefore, providing an accurate lightning risk assessment method for overhead transmission lines and realizing accurate calculation of lightning risk assessment for overhead transmission line towers has important practical significance for guiding the lightning protection design of overhead lines in new projects and differentiated management of lightning protection for in-service lines. Summary of the invention

[0003] The main purpose of the embodiments of the present invention is to provide a method and device for automatically calculating lightning shielding failure by analogy with sunlight projection. By analogy with sunlight projection, the projection basis of the exposed arc of the conductor is directly calculated, thereby realizing the calculation of the shielding failure tripping rate, avoiding the complex geometric structure calculation of the electrical geometric model, and realizing the universal calculation of the shielding failure tripping rate of different types of tower structures by directly calculating the projection of the exposed arc.

[0004] In the first aspect, a method for automatically calculating lightning shielding failure analogous to sunlight projection is provided, the method comprising: collecting basic information of the tower to be evaluated, establishing a basic electrical geometry model of the tower to be evaluated, the basic information including the height of the three-phase conductors, the center distance of the conductors, the height of the two ground wires and the center distance of the ground wires; based on the basic electrical geometry model, determining the coordinates of the intersection of any two strike distance circles among multiple conductors; applying the equation: The straight line Z represents the lightning leader incident situation, where is the coordinate on the line Z, and the parameter Lightning incident angle The slope of the straight line below Indicates the intersection of straight line Z and the ground; calculate each intersection point The projection of the axis is arranged from large to small to obtain the projection intersection points; according to each projection intersection point, the analogy of sunlight projection method is applied based on the straight line Z to obtain the lightning current of each conductor and ground wire. , Lightning incident angle The ground projection set at the time; the comprehensive projection under the double integral of the ground projection set is calculated according to the lightning current amplitude probability distribution and the lightning incident angle distribution, and the shielding tripping rate is calculated according to the comprehensive projection, wherein the comprehensive projection under the double integral of the ground projection set is calculated according to the lightning current amplitude probability distribution and the lightning incident angle distribution using the following relationship:

[0005] ;

[0006] in, For the The comprehensive projection of the root wires, For the Root conductor in lightning current , Lightning incident angle The ground projection at is the lightning incident angle distribution, is the probability distribution of lightning current amplitude.

[0007] In another possible implementation, the basic electrical geometry model of the tower to be evaluated is:

[0008] ;

[0009] ;

[0010] ;

[0011] in, Indicates the lightning current Below, the exposed arc radius of the conductor; Indicates the radius of the ground wire shielding arc; Indicates the height of the ground wire from the ground, used to characterize the protection range of the earth.

[0012] In a possible implementation, based on a basic electrical geometry model, determining the coordinates of the intersection of any two distance circles among the plurality of conductors includes: n Wires, determined based on basic electrical geometry model n strike circle and intersection point; in the lightning current Based on the basic electrical geometry model, any There are two intersection points of the two-click distance circle: and ; If the two circles actually have no intersection, the intersection coordinates are assigned to (-1000, -1000); if the two intersection points are the same point, the two intersection coordinates are the same value.

[0013] In another possible implementation, the intersection points are calculated at x The projection of the axis is arranged from large to small to obtain the intersection of the projections, including: intersection point, , and according to the coordinates of each intersection x Arrange all intersection points in descending order to get the intersection matrix ;right The intersection points are projected according to the slope of line Z to obtain the intersection matrix All intersection points in the image correspond to the projected intersection points on the ground.

[0014] In another possible implementation, the projection intersection points are based on the straight line Z and the analog sunlight projection method is used to obtain the lightning current of each conductor and ground wire. , Lightning incident angle The ground projection set at that time includes: The projection intersection point x Axis divided into intervals; for the straight line Z, take , calculate the straight line Z n The intersection coordinates of the hit circle are selected, and the intersection coordinate with the largest y value is selected. For the wire of the arc corresponding to the intersection corresponding to the selected intersection coordinate m ,Sure[ , ] is the wire m The ground projection line segment; for the straight line Z, the projection process analogous to the sunlight projection is completed from +∞ to -∞, and we get n Root conductor, ground wire in lightning current , Lightning incident angle Ground projection set .

[0015] In another possible implementation, calculating the shielding failure tripping rate according to the comprehensive projection includes: calculating the shielding failure tripping rate according to the comprehensive projection combined with the ground lightning density, the annual number of lightning days and the arcing rate by applying the following relationship:

[0016] ;

[0017] in, For the The tripping rate of wire failure is is the arc building rate, is the ground lightning density, The number of thunderstorm days per year.

[0018] In the second aspect, a lightning shielding failure automatic calculation device analogous to sunlight projection is provided, the device comprising: a model building unit, used to collect basic information of the tower to be evaluated, and establish a basic electrical geometry model of the tower to be evaluated, the basic information including the height of the three-phase conductor, the center distance of the conductor, the height of the two ground wires and the center distance of the ground wires; an intersection coordinate determination unit, used to determine the intersection coordinates of any two strike distance circles in multiple conductors based on the basic electrical geometry model; a lightning incident characterization unit, used to apply the equation The straight line Z represents the lightning leader incident situation, where is the coordinate on the line Z, and the parameter Lightning incident angle The slope of the straight line below Represents the intersection of the straight line Z and the ground; the projection calculation unit is used to calculate the intersection of each point The projection of the axis is arranged from large to small to obtain the projection intersection; the ground projection acquisition unit is used to obtain the lightning current of each conductor and ground wire based on the straight line Z according to each projection intersection using the analog sunlight projection method. , Lightning incident angle A ground projection set when the trip rate calculation unit is used to calculate the comprehensive projection under the double integral of the ground projection set according to the lightning current amplitude probability distribution and the lightning incident angle distribution, and calculate the shielding trip rate according to the comprehensive projection, wherein the comprehensive projection under the double integral of the ground projection set is calculated according to the lightning current amplitude probability distribution and the lightning incident angle distribution using the following relationship:

[0019] ;

[0020] in, For the The comprehensive projection of the root wires, For the Root conductor in lightning current , Lightning incident angle The ground projection at is the lightning incident angle distribution, is the probability distribution of lightning current amplitude.

[0021] In a third aspect, an electronic device is provided, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, a method for automatically calculating lightning shielding by analogy with sunlight projection as provided in the first aspect is implemented.

[0022] In a fourth aspect, a non-transitory computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, a method for automatically calculating lightning shielding failure analogous to sunlight projection as provided in the first aspect is implemented. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in describing the embodiments of the present application are briefly introduced below.

[0024] Figure 1 A flowchart of a method for automatically calculating lightning shielding failure by analogy with sunlight projection provided by one embodiment of the present invention;

[0025] Figure 2 A schematic diagram of a basic electrical geometry model of a tower to be evaluated provided in an embodiment of the present invention;

[0026] Figure 3 A schematic diagram of a projection analogous to sunlight projection according to an embodiment of the present invention;

[0027] Figure 4 A schematic diagram of tower foundation parameters according to an embodiment of the present invention;

[0028] Figure 5 A structural diagram of a lightning shielding failure automatic calculation device analogous to sunlight projection provided by one embodiment of the present invention;

[0029] Figure 6 A schematic diagram of the physical structure of an electronic device provided by the present invention. DETAILED DESCRIPTION

[0030] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar modules or modules with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be interpreted as limiting the present invention.

[0031] It will be understood by those skilled in the art that, unless expressly stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present application refers to the presence of the features, integers, steps, operations, modules and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, modules, components and / or groups thereof. It should be understood that when we refer to a module as being "connected" or "coupled" to another module, it may be directly connected or coupled to the other modules, or there may be intermediate modules. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The term "and / or" used herein includes all or any modules and all combinations of one or more associated listed items.

[0032] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation method of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0033] The technical solution of the present application and how to solve the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0034] like Figure 1 FIG. 1 is a flow chart of a method for automatically calculating lightning shielding failure by analogy with sunlight projection provided by an embodiment of the present invention, the method comprising:

[0035] Step S11, collecting basic information of the tower to be evaluated and establishing a basic electrical geometry model of the tower to be evaluated, wherein the basic information includes the height of three-phase conductors, the center distance of the conductors, the height of two ground wires and the center distance of the ground wires.

[0036] Step S12, based on the basic electrical geometry model, determining the coordinates of the intersection of any two distance circles among the multiple conductors.

[0037] Step S13, the application equation is The straight line Z represents the lightning leader incident situation, where is the coordinate on the line Z, and the parameter Lightning incident angle The slope of the straight line below Indicates the intersection of line Z and the ground.

[0038] Step S14, calculate each intersection point The projection of the axis is arranged from large to small to obtain the intersection of the projections.

[0039] Step S15, according to each projection intersection point, based on the straight line Z, the analog sunlight projection method is used to obtain the lightning current of each conductor and ground wire. , Lightning incident angle The ground projection set at the time.

[0040] Step S16, calculating the comprehensive projection of the ground projection set under the double integral according to the lightning current amplitude probability distribution and the lightning incident angle distribution, and calculating the shielding failure tripping rate according to the comprehensive projection.

[0041] The embodiment of the present invention establishes the geometric structure of the pole tower to be evaluated, solves the intersection points of different exposure arcs based on the electrical geometry model, and calculates the outermost exposure arc by point-by-point scanning, thereby realizing the calculation of the projection distance, avoiding the complex geometric structure calculation of the electrical geometry model, and realizing the universal calculation of the shielding failure tripping rate of different types of pole tower structures by directly calculating the projection of the exposure arc.

[0042] In the embodiment of the present invention, in step S11, optionally, basic information of the tower to be evaluated is collected, including the height of the three-phase conductors, the center distance of the conductors, the height of the two ground wires, and the center distance of the ground wires. The basic electrical geometric model of the tower to be evaluated characterizes the calculation method of the exposed arc radius of the conductors in the tower to be evaluated, the shielding arc radius of the ground wire, and the height of the ground wire from the ground. Figure 2 , for any lightning current The basic electrical geometry model of the tower to be evaluated is:

[0043] ;

[0044] ;

[0045] ;

[0046] in, Indicates the lightning current Below, the exposed arc radius of the conductor; Indicates the radius of the ground wire shielding arc; Indicates the height of the ground wire from the ground, used to characterize the protection range of the earth.

[0047] In step S12, for n Wires, determined based on basic electrical geometry model n strike circle and intersection points;

[0048] In lightning current Based on the basic electrical geometry model, any There are two intersection points of the two-click distance circle: and ; If the two circles actually have no intersection, the intersection coordinates are assigned to (-1000, -1000); if the two intersection points are the same point, the two intersection coordinates are the same value.

[0049] In the embodiment of the present invention, the obtained intersection point, , and according to the coordinates of each intersection x Arrange all intersection points in descending order to get the intersection matrix .right The intersection points are projected according to the slope of line Z to obtain the intersection matrix All intersection points in the image correspond to the projection intersection points on the ground, and all projection intersection points are combined to obtain the projection matrix. .

[0050] right The projection intersection point x Axis divided into For the straight line Z, take , calculate the straight line Z n The intersection coordinates of the hit circle are selected, and the intersection coordinate with the largest y value is selected. For the wire of the arc corresponding to the intersection corresponding to the selected intersection coordinate m ,Sure[ , ] is the wire m The ground projection line segment.

[0051] See also Figure 3 , for the straight line Z, the projection process analogous to sunlight projection is completed from +∞ to -∞, and we get n Root conductor, ground wire in lightning current , Lightning incident angle Ground projection set .

[0052] Considering the probability distribution of lightning current amplitude and lightning incident angle distribution, the projection under double integral is obtained Optionally, the comprehensive projection under the double integral of the ground projection set is calculated using the following relationship based on the lightning current amplitude probability distribution and the lightning incident angle distribution:

[0053] ;

[0054] in, For the The comprehensive projection of the root wires, For the Root conductor in lightning current , Lightning incident angle The ground projection at is the lightning incident angle distribution, is the probability distribution of lightning current amplitude. Among them:

[0055] ;

[0056] After obtaining the comprehensive projection of each conductor, the shielding trip rate is calculated using the following relationship based on the comprehensive projection combined with the ground lightning density, annual lightning days and arcing rate:

[0057] ;

[0058] in, For the The tripping rate of wire breakdown, in times / (100km·year), is the arc building rate, is the ground lightning density, unit is 1 / (km 2 ·day), The number of thunderstorm days per year.

[0059] The embodiment of the present invention is based on the line tower parameters, takes into account the lightning current amplitude distribution and the lightning incident angle distribution, and when using the electrical geometry model to calculate the electrical geometry exposure space of the conductor, the conductor exposure arc projection basis is directly calculated by analogy with the sunlight projection method, thereby realizing the calculation of the shielding failure tripping rate. Compared with the traditional calculation method, it takes into account the avoidance of the complex geometric structure calculation of the ordinary electrical geometry model, and realizes the universal calculation of the shielding failure tripping rate of different types of tower structures by directly calculating the projection of the exposure arc, which has important engineering significance.

[0060] The following example illustrates a single-circuit 500 kV line with two ground wires and three-phase conductors. The following is the specific calculation process.

[0061] First, collect the basic parameters of a tower on the line. Figure 4 And as shown in Table 1.

[0062] Table 1 Tower foundation parameters

[0063]

[0064] Then calculate the intersection points between the circles, a total of An intersection point.

[0065] Calculate the intersection points The projection of the axis, and arrange them from large to small to get the intersection point .

[0066] Lightning incident angle The straight line Z below is set differently b value, calculate a b Value, the intersection with the 5 circles, for y The intersection point with the largest value is considered to be the projection interval segment where the line is located. is the ground projection of the corresponding conductor (ground wire).

[0067] Evaluating double integrals , Under, the comprehensive projection of each conductor and ground wire Finally, the conductor shielding failure tripping rate is calculated. If the shielding failure tripping rate of a conductor is greater than the preset threshold, it means that the line needs to be modified.

[0068] In summary, the embodiment of the present invention collects basic information of the tower to be evaluated to establish a basic electrical geometry model of the tower to be evaluated; based on the basic electrical geometry model, the coordinates of the intersection of any two distance circles among multiple conductors are determined; the application equation is: The straight line Z represents the lightning leader incident situation, where is the coordinate on the line Z, and the parameter Lightning incident angle The slope of the straight line below Indicates the intersection of straight line Z and the ground; calculate each intersection point The projection of the axis is arranged from large to small to obtain the projection intersection points; according to each projection intersection point, the analogy of sunlight projection method is applied based on the straight line Z to obtain the lightning current of each conductor and ground wire. , Lightning incident angle The ground projection set at that time; the comprehensive projection under the double integral of the ground projection set is calculated according to the lightning current amplitude probability distribution and the lightning incident angle distribution, and the shielding failure tripping rate is calculated according to the comprehensive projection, which avoids the complex geometric structure calculation of the electrical geometric model. By directly calculating the projection of the exposed arc, the universal calculation of the shielding failure tripping rate of different types of tower structures is realized.

[0069] like Figure 5 The figure shows a structural diagram of a lightning shielding failure automatic calculation device analogous to sunlight projection provided by an embodiment of the present invention, the device comprising:

[0070] The model building unit 501 is used to collect basic information of the tower to be evaluated and build a basic electrical geometric model of the tower to be evaluated;

[0071] An intersection coordinate determining unit 502 is used to determine the intersection coordinates of any two distance circles among the multiple conductors based on a basic electrical geometry model;

[0072] The lightning incident characterization unit 503 is used to apply the equation The straight line Z represents the lightning leader incident situation, where is the coordinate on the line Z, and the parameter Lightning incident angle The slope of the straight line below represents the intersection of the straight line Z and the ground;

[0073] Projection calculation unit 504, used to calculate the intersection of each point The projection of the axis is arranged from large to small to obtain the intersection of the projections;

[0074] The ground projection acquisition unit 505 is used to obtain the lightning current of each conductor and ground wire based on the intersection of each projection and the straight line Z by using the analog sunlight projection method. , Lightning incident angle The ground projection set at the time;

[0075] The trip rate calculation unit 506 is used to calculate the comprehensive projection under the double integral of the ground projection set according to the lightning current amplitude probability distribution and the lightning incident angle distribution, and calculate the shielding failure trip rate according to the comprehensive projection.

[0076] The device of the above embodiment is applied to the corresponding method in the above embodiment, and has the beneficial effects of the corresponding method embodiment, which will not be described in detail here.

[0077] Figure 6 An example of a physical structure diagram of an electronic device is shown in FIG. Figure 6As shown, the electronic device may include: a processor (processor) 601, a communication interface (Communications Interface) 602, a memory (memory) 603 and a communication bus 604, wherein the processor, the communication interface and the memory communicate with each other through the communication bus. The processor may call the logic instructions in the memory to execute an automatic calculation method for lightning shielding failure analogous to sunlight projection, the method comprising: collecting basic information of the tower to be evaluated, establishing a basic electrical geometry model of the tower to be evaluated; based on the basic electrical geometry model, determining the coordinates of the intersection of any two strike distance circles in a plurality of conductors; applying the equation: The straight line Z represents the lightning leader incident situation, where is the coordinate on the line Z, and the parameter Lightning incident angle The slope of the straight line below Indicates the intersection of straight line Z and the ground; calculate each intersection point The projection of the axis is arranged from large to small to obtain the projection intersection points; according to each projection intersection point, the analogy of sunlight projection method is applied based on the straight line Z to obtain the lightning current of each conductor and ground wire. , Lightning incident angle The ground projection set at that time; the comprehensive projection under the double integral of the ground projection set is calculated according to the lightning current amplitude probability distribution and the lightning incident angle distribution, and the shielding failure tripping rate is calculated based on the comprehensive projection.

[0078] In addition, the logic instructions in the above-mentioned memory can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0079] On the other hand, an embodiment of the present invention further provides a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium, and the computer program includes program instructions. When the program instructions are executed by a computer, the computer can execute a lightning shielding failure automatic calculation method analogous to sunlight projection provided by the above-mentioned method embodiments, the method comprising: collecting basic information of the tower to be evaluated, establishing a basic electrical geometry model of the tower to be evaluated; determining the coordinates of the intersection of any two strike distance circles among multiple conductors based on the basic electrical geometry model; applying the equation: The straight line Z represents the lightning leader incident situation, where is the coordinate on the line Z, and the parameter Lightning incident angle The slope of the straight line below Indicates the intersection of straight line Z and the ground; calculate each intersection point The projection of the axis is arranged from large to small to obtain the projection intersection points; according to each projection intersection point, the analogy of sunlight projection method is applied based on the straight line Z to obtain the lightning current of each conductor and ground wire. , Lightning incident angle The ground projection set at that time; the comprehensive projection under the double integral of the ground projection set is calculated according to the lightning current amplitude probability distribution and the lightning incident angle distribution, and the shielding failure tripping rate is calculated based on the comprehensive projection.

[0080] On the other hand, an embodiment of the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, it is implemented to execute a method for automatically calculating lightning shielding failure by analogy with sunlight projection provided in the above embodiments. The method comprises: collecting basic information of the tower to be evaluated, establishing a basic electrical geometry model of the tower to be evaluated; determining the coordinates of the intersection of any two strike distance circles among multiple conductors based on the basic electrical geometry model; applying the equation: The straight line Z represents the lightning leader incident situation, where is the coordinate on the line Z, and the parameter Lightning incident angle The slope of the straight line below Indicates the intersection of straight line Z and the ground; calculate each intersection point The projection of the axis is arranged from large to small to obtain the projection intersection points; according to each projection intersection point, the analogy of sunlight projection method is applied based on the straight line Z to obtain the lightning current of each conductor and ground wire. , Lightning incident angle The ground projection set at that time; the comprehensive projection under the double integral of the ground projection set is calculated according to the lightning current amplitude probability distribution and the lightning incident angle distribution, and the shielding failure tripping rate is calculated based on the comprehensive projection.

[0081] It should be understood that, although the steps in the flowchart of the accompanying drawings are displayed in sequence as indicated by the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least a part of the steps in the flowchart of the accompanying drawings may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily executed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be executed in turn or alternately with other steps or at least a part of the sub-steps or stages of other steps.

[0082] The above is only a partial implementation of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A lightning shielding failure automatic calculation method analogous to sunlight projection, characterized in that: The method comprises: Collect basic information of the tower to be evaluated, and establish a basic electrical geometry model of the tower to be evaluated, wherein the basic information includes the height of three-phase conductors, the center distance of the conductors, the height of two ground wires, and the center distance of the ground wires; Based on the basic electrical geometry model, determining the coordinates of the intersection of any two distance circles among the plurality of conductors; The application equation is The straight line Z represents the lightning leading incident situation, where (x, y ) is the coordinate on the line Z, and the parameter is the lightning incident angle The slope of the straight line below b represents the intersection of the straight line Z and the ground; Calculate the intersection points at x The projection of the axis is arranged from large to small to obtain the intersection of the projections; According to each of the projection intersections, based on the straight line Z, an analog sunlight projection method is applied to obtain the lightning current of each conductor and ground wire. , Lightning incident angle The ground projection set at the time; The comprehensive projection under the double integral of the ground projection set is calculated according to the lightning current amplitude probability distribution and the lightning incident angle distribution, and the shielding tripping rate is calculated according to the comprehensive projection, wherein the comprehensive projection under the double integral of the ground projection set is calculated according to the lightning current amplitude probability distribution and the lightning incident angle distribution by applying the following relationship: ； in, For the The comprehensive projection of the root wires, For the Root conductor in lightning current , Lightning incident angle The ground projection at is the lightning incident angle distribution, is the probability distribution of lightning current amplitude.

2. The method according to claim 1, characterized in that The basic electrical geometry model of the tower to be evaluated is: ； ； ； in, Indicates the lightning current Below, the exposed arc radius of the conductor; Indicates the radius of the ground wire shielding arc; Indicates the height of the ground wire from the ground, used to characterize the protection range of the earth.

3. The method according to claim 1, characterized in that The step of determining the coordinates of the intersection of any two distance circles among the plurality of conductors based on the basic electrical geometry model comprises: for n Wires, determined based on the basic electrical geometry model n strike circle and intersection points; In lightning current I Next, based on the basic electrical geometry model, any k , m There are two intersection points of the two-click distance circle: and ; If the two circles actually have no intersection, the intersection coordinates are assigned to (-1000, -1000); if the two intersection points are the same point, the two intersection coordinates are the same value.

4. The method according to claim 3, characterized in that The calculation of each intersection point is x The projection of the axis is arranged from large to small to obtain the projection intersection points, including: To get intersection point, , and according to the coordinates of each intersection x Arrange all intersection points in descending order to get the intersection matrix ; For j intersection points, project according to the slope of line Z to obtain the intersection matrix All intersection points in the image correspond to the projected intersection points on the ground.

5. The method according to claim 4, characterized in that According to each of the projection intersections, based on the straight line Z, the analog sunlight projection method is used to obtain the lightning current of each conductor and ground wire. , Lightning incident angle The ground projection set at the time includes: right The projection intersection point x Axis divided into intervals; For the line Z, take , calculate the straight line Z n The intersection coordinates of the hit circle are selected, and the intersection coordinate with the largest y value is selected. For the wire of the arc corresponding to the intersection corresponding to the selected intersection coordinate m ,Sure[ , ] is the wire m The ground projection line segment of For the straight line Z, the projection process analogous to sunlight projection is completed from +∞ to -∞, and we get n Root conductor, ground wire in lightning current , Lightning incident angle Ground projection set .

6. The method according to claim 1, characterized in that The calculating the shielding failure trip rate according to the comprehensive projection comprises: According to the comprehensive projection combined with the ground lightning density, annual lightning days and arcing rate, the following relationship is used to calculate the shielding tripping rate: ； in, For the The tripping rate of wire failure is is the arc building rate, is the ground lightning density, The number of thunderstorm days per year.

7. A lightning shielding failure automatic calculation device analogous to sunlight projection, characterized in that: The device comprises: A model building unit, used to collect basic information of the pole tower to be evaluated and build a basic electrical geometry model of the pole tower to be evaluated, wherein the basic information includes the height of three-phase conductors, the center distance of the conductors, the height of two ground wires and the center distance of the ground wires; An intersection coordinate determination unit, used for determining the intersection coordinates of any two distance circles among the plurality of conductors based on the basic electrical geometry model; Lightning incident characterization unit, used to apply the equation The straight line Z represents the lightning leading incident situation, where (x, y) is the coordinate on the straight line Z, and the parameter Lightning incident angle The slope of the straight line below b represents the intersection of the straight line Z and the ground; Projection calculation unit, used to calculate the intersection points x The projection of the axis is arranged from large to small to obtain the intersection of the projections; The ground projection acquisition unit is used to obtain the lightning current of each conductor and ground wire based on the straight line Z by using the analog sunlight projection method according to each projection intersection point. I , Lightning incident angle The ground projection set at the time; The trip rate calculation unit is used to calculate the comprehensive projection under the double integral of the ground projection set according to the lightning current amplitude probability distribution and the lightning incident angle distribution, and calculate the shielding trip rate according to the comprehensive projection, wherein the comprehensive projection under the double integral of the ground projection set is calculated by applying the following relationship according to the lightning current amplitude probability distribution and the lightning incident angle distribution: ； in, For the The comprehensive projection of the root wires, For the Root conductor in lightning current , Lightning incident angle The ground projection at is the lightning incident angle distribution, is the probability distribution of lightning current amplitude.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the method for automatically calculating lightning shielding failure by analogy with sunlight projection according to any one of claims 1 to 6 is implemented.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the computer program realizes an automatic calculation method for lightning shielding failure analogous to sunlight projection according to any one of claims 1 to 6.

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