A method for optimizing the layout of PLP lightning protection for high-drop transmission lines

Abstract

The present application relates to the technical field of power system protection, and in particular to a method for optimizing the layout of PLP lightning protection for high-drop transmission lines. A PLP device is first installed on the highest pole tower on non-flat ground, and then an adjacent pole tower is selected to determine whether it is within the horizontal protection range of the PLP device. If so, the adjacent pole tower is determined to be within the vertical protection range of the PLP device by calculating the inclination angle between the highest pole tower and the adjacent pole tower. If not, it is determined that a PLP device needs to be installed on the adjacent pole tower. It is not limited to the layout of PLP for transmission lines in plateau mountains, but is applicable to the PLP lightning protection layout of power equipment in the same area with any height difference. It aims to solve the problem of how to arrange PLP on pole towers in non-flat sites with height differences.

Description

Technical Field

[0001] The present application relates to the technical field of power system protection, and in particular to a method for optimizing the arrangement of PLP lightning protection for high-drop transmission lines. Background Art

[0002] At present, a new type of lightning protection device has been proposed - Plasma Lightning Protector (PLP), which has a good effect in lightning protection. It uses the "tip-like effect" to make its own electric field strength under the thundercloud two orders of magnitude higher than the protected object, and gathers the thundercloud charge, so that the protected target is in a safe position with a relatively low electric field. It uses an induction array anti-lightning rod and a dielectric barrier strong ionization composite discharger, and uses the thundercloud electric field to achieve passive strong ionization. The strong ionization discharger generates and radiates high-concentration plasma in both directions from cloud to ground, and efficiently neutralizes the thundercloud charge induced by the anti-lightning rod, solving the fatal problem that the electric field self-shielding effect of the traditional lightning arrester array needle suppresses the increase of divergent current and is easily struck by lightning.

[0003] The installation of PLP requires a certain height. The transmission line tower itself has a high ground drop, so the top of the tower is the best installation location for PLP. However, when PLP is used in complex mountainous areas with high and low terrain differences such as plateaus, there will be height differences between towers. The lightning protection range of PLP installed on some towers can cover adjacent towers. At this time, there is no need to arrange PLP on adjacent towers within the lightning protection range. Therefore, a method for optimizing the layout of PLP lightning protection for high-drop transmission lines is needed to give full play to the lightning protection effect of PLP and save installation costs. Summary of the invention

[0004] The main purpose of this application is to provide a method for optimizing the layout of PLP lightning protection for high-drop transmission lines, aiming to solve the problem of how to arrange PLP on towers in non-planar sites with high and low terrain differences.

[0005] To achieve the above-mentioned object, the present application provides a method for optimizing the layout of PLP lightning protection for high-drop transmission lines, which is applied to a non-planar site, wherein the non-planar site includes at least two towers of non-equal heights, and the method includes the following steps:

[0006] S10, setting a target PLP device at the current highest pole tower in the non-planar site, and measuring the height difference between the needle end of the target PLP device and the ground as the pole tower height;

[0007] S20, measuring the horizontal distance between the current highest tower and at least one adjacent tower and the vertical height difference between the current highest tower and the adjacent tower, and determining whether the adjacent tower is within the horizontal protection range of the PLP device according to the horizontal distance and the vertical height difference;

[0008] S30: If yes, taking the base of the currently highest tower as the origin, establishing a rectangular coordinate system on the plane formed by the currently highest tower and the adjacent towers, and determining the inclination angle between the currently highest tower and the adjacent tower based on the rectangular coordinate system;

[0009] S40, determining whether the inclination angle is greater than a preset inclination angle threshold, where the preset inclination angle threshold is the inclination angle of the cone busbar within the PLP protection range;

[0010] S50: If yes, it is determined that the adjacent tower needs to be arranged with a PLP; otherwise, it is determined that the adjacent tower does not need to be arranged with a PLP.

[0011] Optionally, the S20 includes:

[0012] The horizontal spacing is calculated as follows:

[0013]

[0014] Where Δx is the horizontal difference between the current highest tower and the adjacent tower, x is the straight-line distance between the current highest tower and the adjacent tower, and Δh is the vertical height difference between the current highest tower and the adjacent tower;

[0015] Obtaining a horizontal protection range radius of the PLP device;

[0016] When the horizontal spacing is less than the radius of the horizontal protection range, it is determined that the adjacent tower is within the horizontal protection range of the target PLP device; otherwise, it is determined that the adjacent tower is outside the horizontal protection range of the target PLP device.

[0017] Optionally, the calculation expression of the horizontal protection range radius is:

[0018]

[0019] Where r is the horizontal protection range radius of the PLP device, h is the tower height, and Δh is the vertical height difference between the current highest tower and the adjacent tower.

[0020] Optionally, the step of calculating the tilt angle in S30 includes:

[0021] The rectangular coordinate system is constructed by taking the bottom of the current highest tower as the origin O of the coordinate system, the direction from the current highest tower to the adjacent tower as the positive direction of the x-axis, and the direction from the bottom to the top of the current highest tower as the positive direction of the y-axis;

[0022] Based on the plane formed by the rectangular coordinate system, the inclination angle is calculated according to the measured vertical height difference and the horizontal distance.

[0023] Optionally, the calculation expression of the tilt angle is:

[0024]

[0025] Where θ is the inclination angle of the plane between the current highest tower and the adjacent tower based on the rectangular coordinate system, Δx is the horizontal difference between the current highest tower and the adjacent tower, h is the tower height, It is the vertical height difference between the current highest tower and the adjacent tower.

[0026] Optionally, the preset tilt angle threshold has a value interval of [174°, 176°].

[0027] Optionally, after S20, the step further includes:

[0028] S60: If not, determine whether the adjacent tower needs to be installed with a PLP.

[0029] Optionally, after S50, the method further includes:

[0030] S70, selecting a pole tower with the next highest height as the current highest pole tower, and repeating steps S10-S50 until it is determined whether each pole tower in the non-planar site needs to be installed with a PLP.

[0031] In addition, to achieve the above objectives, the present application also provides a transmission line tower, which determines whether it is necessary to arrange PLP on the top of the tower through the high-drop transmission line PLP lightning protection optimization arrangement method as described in any of the above items.

[0032] This application has at least the following beneficial effects:

[0033] 1. Reasonably install PLP on the transmission line tower in a non-planar site with height difference for lightning protection, taking into account both reliability and economy;

[0034] 2. This method is not limited to the layout of PLP transmission lines in plateau mountains, but is applicable to the PLP lightning protection layout of power equipment in the same area with any height difference. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a flow chart of the first embodiment of the method for optimizing the arrangement of lightning protection for high-drop transmission lines PLP of the present application;

[0036] Figure 2 This is a schematic diagram of the protection scope of the PLP device involved in the first embodiment of the present application;

[0037] Figure 3A schematic diagram of the construction of a rectangular coordinate system and an inclination angle involved in the first embodiment of the present application;

[0038] Figure 4 This is a flow chart of the second embodiment of the method for optimizing the arrangement of lightning protection for high-drop transmission line PLP of the present application;

[0039] Figure 5 This is a flow chart of a third embodiment of the method for optimizing the arrangement of lightning protection for high-drop transmission lines PLP of the present application;

[0040] Figure 6 This is a layout diagram of the fourth embodiment of the high-drop transmission line PLP lightning protection optimization layout method of the present application;

[0041] Figure 7 This is a layout diagram of the fifth embodiment of the high-drop transmission line PLP lightning protection optimization layout method of the present application;

[0042] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0043] In order to better understand the above technical solution, exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0044] Based on the above-mentioned power system protection technology, an embodiment of the high-drop transmission line PLP lightning protection optimization layout method of the present application is proposed.

[0045] Reference Figure 1 In the first embodiment, the high drop transmission line PLP lightning protection optimization layout method comprises the following steps:

[0046] S10, setting a target PLP device at the current highest pole tower in the non-planar site, and measuring the height difference between the needle end of the target PLP device and the ground as the pole tower height;

[0047] In this embodiment, first, a pole tower currently set at the highest point of the non-planar site is found, a PLP device is set on top of the pole tower as the target PLP device, and the height difference between the needle end of the target PLP device and the ground is measured as the pole tower height.

[0048] A non-planar site refers to a site with a certain inclination and / or unevenness, such as a plateau or mountainous area.

[0049] S20, measuring the horizontal distance between the current highest tower and at least one adjacent tower and the vertical height difference between the current highest tower and the adjacent tower, and determining whether the adjacent tower is within the horizontal protection range of the PLP device according to the horizontal distance and the vertical height difference;

[0050] In this embodiment, then, the horizontal distance between the current highest tower and at least one adjacent tower is measured, and the vertical height difference between the current highest tower and the adjacent tower is measured, and it is determined whether the adjacent tower is within the horizontal protection range of the PLP device based on the horizontal distance and the vertical height difference.

[0051] The adjacent pole towers refer to the pole towers adjacent to the current tallest pole tower. The height of the adjacent pole towers may be the same as or smaller than the current tallest pole tower.

[0052] It is understandable that when there are two or more pole towers of the same height in the non-planar site, the pole tower close to the center of the non-planar site is selected as the current highest pole tower.

[0053] It should be noted that, refer to Figure 2 The protection range diagram of the PLP device is shown, and its protection range includes the horizontal protection range and the vertical protection range shown in the figure. In this embodiment, it is first determined whether the adjacent tower is within the horizontal protection range, and if so, further determination is made.

[0054] Specifically and optionally, in this embodiment, how to determine whether adjacent towers are within the horizontal protection range of the PLP device is as follows:

[0055] (1)

[0056] Where Δx is the horizontal difference between the current highest tower and the adjacent tower, x is the straight-line distance between the current highest tower and the adjacent tower, and Δh is the vertical height difference between the current highest tower and the adjacent tower;

[0057] Obtaining a horizontal protection range radius of the PLP device;

[0058] When the horizontal spacing is less than the radius of the horizontal protection range, it is determined that the adjacent tower is within the horizontal protection range of the target PLP device; otherwise, it is determined that the adjacent tower is outside the horizontal protection range of the target PLP device.

[0059] Further and optionally, the calculation expression of the horizontal protection range radius is:

[0060] (2)

[0061] In the formula, r is the radius of the horizontal protection range of the PLP device, h is the height of the pole tower, and Δh is the vertical height difference between the current highest pole tower and the adjacent pole tower.

[0062] Compare the calculated Δx with r. If Δx < r exists, the horizontal position of this pole tower is within the protection area of the highest pole tower where the PLP is installed, and then proceed to the next step.

[0063] S30, if so, take the bottom of the current highest pole tower as the origin, and establish a rectangular coordinate system on the plane formed by the current highest pole tower and the adjacent pole tower, and determine the inclination angle between the current highest pole tower and the adjacent pole tower based on the rectangular coordinate system;

[0064] In this embodiment, when it is determined that the horizontal distance is less than the radius of the horizontal protection range, a rectangular coordinate system is established with the plane of the two pole towers and the bottom of the pole tower where the PLP is installed as the origin, the coordinates of the top of the pole tower where the PLP is installed and the coordinates of the top of the adjacent pole tower are calculated, and the inclination angle of the straight line equation formed by the tops of the two pole towers is calculated.

[0065] Specifically and optionally, first, take the bottom of the current highest pole tower as the origin O of the coordinate system, the direction from the current highest pole tower to the adjacent pole tower as the positive direction of the x-axis, and the direction from the bottom to the top of the current highest pole tower as the positive direction of the y-axis to construct the rectangular coordinate system. Then, based on the plane formed by the rectangular coordinate system, calculate the inclination angle according to the measured vertical height difference and the horizontal distance.

[0066] Further and optionally, the calculation expression of the inclination angle is:

[0067] (3)

[0068] In the formula, θ is the inclination angle between the current highest pole tower and the adjacent pole tower based on the plane formed by the rectangular coordinate system, Δx is the horizontal difference between the current highest pole tower and the adjacent pole tower, h is the height of the pole tower, is the vertical height difference between the current highest pole tower and the adjacent pole tower.

[0069] Exemplarily, for the construction of the rectangular coordinate system and the inclination angle, refer to Figure 3 .

[0070] S40, determine whether the inclination angle is greater than a preset inclination angle threshold;

[0071] S50, if so, determine that the adjacent pole tower needs to be arranged with PLP; otherwise, determine that the adjacent pole tower does not need to be arranged with PLP.

[0072] In this embodiment, it is determined whether the inclination angle is greater than a preset inclination angle threshold. The preset inclination angle threshold is characterized by the inclination angle of the cone busbar of the PLP protection range. When the inclination angle is greater than the preset inclination angle threshold, it means that the vertical height of the adjacent tower exceeds the vertical protection range of the target PLP. Therefore, it is necessary to arrange the PLP on the top of the adjacent tower.

[0073] Optionally, the protection angle of the PLP device is usually between 84° and 86°, so the value range of the preset tilt angle threshold is:

[0074] 180°-(90°-84°) or 180°-(90°-86°)

[0075] That is, the value interval of the preset tilt angle threshold is [174°, 176°].

[0076] Optionally, the preset tilt angle threshold may be preferably 174°. That is, when θ>174°, the vertical height of the tower exceeds the protection range, and the tower needs to be arranged with a PLP.

[0077] In the technical solution provided in this embodiment, a PLP device is first installed on the highest tower on the non-flat ground, and then an adjacent tower is selected to determine whether it is within the horizontal protection range of the PLP device. If so, the inclination angle between the highest tower and the adjacent tower is calculated to determine whether the adjacent tower is within the vertical protection range of the PLP device. If not, it is determined that a PLP device needs to be installed on the adjacent tower. This is not limited to the layout of PLP for transmission lines in plateau mountains, but is applicable to the PLP lightning protection layout of power equipment in the same area with any height difference.

[0078] Second embodiment

[0079] Based on the first embodiment, in this embodiment, refer to Figure 4 , after S20, further comprising:

[0080] S60: If not, determine whether the adjacent tower needs to be equipped with a PLP.

[0081] In this embodiment, if it is determined that the adjacent pole tower is not within the horizontal protection range of the PLP device, it is directly considered that the adjacent pole tower needs to be arranged with a PLP.

[0082] Third embodiment

[0083] Based on the first or second embodiment, in this embodiment, refer to Figure 5 , after S50, further comprising:

[0084] S70, selecting a pole tower with the next highest height as the current highest pole tower, and repeating steps S10-S50 until it is determined whether each pole tower in the non-planar site needs to be installed with a PLP.

[0085] In this embodiment, after completing the judgment of whether the adjacent towers near the current highest tower in the non-planar site are within the protection range, the second highest tower with a height second only to the highest tower in the previous round is selected as the current highest tower in the next round, until the judgment is completed for each tower in the non-planar site, thereby completing the PLP lightning protection optimization layout.

[0086] Fourth embodiment

[0087] Reference Figure 6 Based on the first embodiment, as a specific implementation method, in this embodiment, the height h of the tower is set to 14m, the height difference Δh between the highest tower and the selected adjacent tower is set to 56m, the straight-line distance x between the two towers is 503m, and the preset inclination angle threshold is 174°.

[0088] Substituting the height h and the height difference Δh into formula (1), we can obtain the horizontal protection range radius r = 600m;

[0089] Substituting the straight-line distance x and the height difference Δh into equation (2), we obtain the horizontal distance Δx to be approximately 500 m.

[0090] Substituting the height difference Δh and the horizontal distance Δx into equation (3), we obtain the inclination angle θ=173.61°<174°.

[0091] Therefore, it is determined that there is no need to arrange PLP on adjacent towers.

[0092] Fifth embodiment

[0093] Reference Figure 7 Based on the first embodiment, as a specific implementation method, in this embodiment, the height h of the tower is set to 14m, the height difference Δh between the highest tower and the selected adjacent tower is set to 34m, the straight-line distance x between the two towers is 450m, and the preset inclination angle threshold is 174°.

[0094] Substituting the height h and the height difference Δh into formula (1), we can obtain the horizontal protection range radius r = 480m;

[0095] Substituting the straight-line distance x and the height difference Δh into equation (2), we can obtain the horizontal distance Δx to be approximately 449 m.

[0096] Substituting the height difference Δh and the horizontal distance Δx into equation (3), we obtain the inclination angle θ=175.67°>174°.

[0097] Therefore, it is determined that PLP needs to be arranged on adjacent towers.

[0098] It should be noted that since the storage medium provided in the embodiment of the present application is the storage medium used to implement the method of the embodiment of the present application, based on the method introduced in the embodiment of the present application, the person skilled in the art can understand the specific structure and deformation of the storage medium, so it is not repeated here. All storage media used in the method of the embodiment of the present application belong to the scope of protection of this application.

[0099] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems or computer program products. Therefore, the present application may take the form of a complete hardware embodiment, a complete software embodiment or an embodiment combining software and hardware. Moreover, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0100] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems) and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0101] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0102] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0103] It should be noted that in the claims, any reference signs placed between brackets shall not be construed as limiting the claims. The word "comprising" does not exclude the presence of components or steps not listed in the claim. The word "a" or "an" preceding a component does not exclude the presence of a plurality of such components. The present application may be implemented by means of hardware comprising several different components and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third etc. does not indicate any order. These words may be interpreted as names.

[0104] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0105] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A method for optimizing the layout of PLP lightning protection for high-drop transmission lines, characterized in that: Applied to a non-planar site, the non-planar site includes at least two pole towers of unequal heights, and the method includes the following steps: S10, setting a target PLP device at the current highest pole tower in the non-planar site, and measuring the height difference between the needle end of the target PLP device and the ground as the pole tower height; S20, measuring the horizontal distance between the current highest tower and at least one adjacent tower and the vertical height difference between the current highest tower and the adjacent tower, and determining whether the adjacent tower is within the horizontal protection range of the PLP device according to the horizontal distance and the vertical height difference; S30: If yes, taking the base of the currently highest tower as the origin, establishing a rectangular coordinate system on the plane formed by the currently highest tower and the adjacent towers, and determining the inclination angle between the currently highest tower and the adjacent tower based on the rectangular coordinate system; S40, determining whether the inclination angle is greater than a preset inclination angle threshold, where the preset inclination angle threshold is the inclination angle of the cone busbar within the PLP protection range; S50, if yes, it is determined that the adjacent tower needs to be arranged with a PLP; otherwise, it is determined that the adjacent tower does not need to be arranged with a PLP; The step of calculating the tilt angle in S30 includes: The rectangular coordinate system is constructed by taking the bottom of the current highest tower as the origin O of the coordinate system, the direction from the current highest tower to the adjacent tower as the positive direction of the x-axis, and the direction from the bottom to the top of the current highest tower as the positive direction of the y-axis; Based on the plane formed by the rectangular coordinate system, the inclination angle is calculated according to the measured vertical height difference and the horizontal spacing; The calculation expression of the inclination angle is: ； Where θ is the inclination angle of the plane between the current highest tower and the adjacent tower based on the rectangular coordinate system, Δx is the horizontal difference between the current highest tower and the adjacent tower, h is the height of the highest tower, The vertical height difference between the current tallest tower and the adjacent tower.

2. The method according to claim 1, characterized in that The S20 includes: The horizontal spacing is calculated as follows: ； Where Δx is the horizontal difference between the current highest tower and the adjacent tower, x is the straight-line distance between the current highest tower and the adjacent tower, and Δh is the vertical height difference between the current highest tower and the adjacent tower; Obtaining a horizontal protection range radius of the PLP device; When the horizontal spacing is less than the radius of the horizontal protection range, it is determined that the adjacent tower is within the horizontal protection range of the target PLP device; otherwise, it is determined that the adjacent tower is outside the horizontal protection range of the target PLP device.

3. The method according to claim 2, characterized in that The calculation expression of the radius of the horizontal protection range is: ； Where r is the horizontal protection range radius of the PLP device, h is the height of the highest tower, and Δh is the vertical height difference between the current highest tower and the adjacent tower.

4. The method according to claim 1, characterized in that The preset tilt angle threshold has a value interval of [174°, 176°].

5. The method according to claim 1, characterized in that After S20, the following steps are also included: S60: If not, determine whether the adjacent tower needs to be installed with a PLP.

6. The method according to claim 1, characterized in that After S50, the method further includes: S70, selecting a pole tower with the next highest height as the current highest pole tower, and repeating steps S10-S50 until it is determined whether each pole tower in the non-planar site needs to be installed with a PLP.

7. A transmission line tower, characterized in that: The transmission line tower determines whether it is necessary to arrange PLP on the top of the tower by using the method for optimizing the arrangement of PLP lightning protection for high-drop transmission lines according to any one of claims 1 to 6.

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