A method and system for planning a power transmission line based on a shared tower

Abstract

The application provides a shared iron tower power transmission line planning method and system, which comprises the following steps: in a certain length of line, according to different spans of adjacent iron towers, the height and the number of the iron towers under each span are calculated respectively; and the optimal scheme of the shared iron tower power transmission line is determined based on the spans of the adjacent iron towers, the corresponding height and the number of the iron towers of each span; wherein the spans of the adjacent iron towers are all the spans meeting the antenna coverage requirement, and the most economical scheme meeting the antenna signal coverage requirement can be determined after the given length of the line, which is beneficial to improve the economy of the shared iron tower project and effectively control the project cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power grid engineering design management, and particularly relates to a shared tower transmission line planning method and system. BACKGROUND

[0002] With the further acceleration of shared tower construction, under the premise of considering the communication antenna hanging height and coverage distance, the main factors affecting the economy of the shared tower are the tower span l and the tower height h. With the increase of the tower span l, under the premise that the line length D is unchanged, the number of towers will be reduced, thereby reducing the line construction cost, but the tower height will also increase due to the increase of the span, and the tower weight will also increase, thereby causing the increase of the line construction cost.

[0003] How to reduce the construction cost under the premise of meeting the communication signal coverage to improve the technical and economic benefits of the project has become a research focus. SUMMARY

[0004] In order to solve the above-mentioned deficiencies existing in the prior art, the present application provides a shared tower transmission line planning method and system, which is mainly used for planning the newly-built shared tower transmission line. From the economic point of view, under the premise of meeting the existing power and communication specification requirements, the most economical number and height of the tower are selected to provide a reference basis for the transmission line planning, and the blank of the economic planning of the shared tower transmission line is filled.

[0005] The purpose of the present application is achieved by the following technical solutions:

[0006] The present application provides a shared tower transmission line planning method, which comprises:

[0007] In a certain length of line, the tower height and the number of towers under each span are calculated according to the different spans of adjacent towers;

[0008] The optimal scheme of the shared tower transmission line is determined based on the spans of adjacent towers, the tower height and the number of towers corresponding to each span;

[0009] The spans of the adjacent towers are all the spans meeting the antenna coverage requirements.

[0010] Preferably, the optimal scheme of the shared tower transmission line is determined based on the spans of adjacent towers, the tower height and the number of towers corresponding to each span, which comprises:

[0011] The tower cost is calculated according to the tower height and the number of towers under each span;

[0012] The scheme of the shared tower transmission line is determined based on the optimal cost corresponding to the spans of adjacent towers, the tower height and the number of towers.

[0013] Preferably, the formula for calculating the tower cost based on the tower height and number of towers under each span is as follows:

[0014]

[0015] Where C is the cost of the iron tower, n is the number of iron towers, h is the height of the iron tower, and c is the cost per unit height of the iron tower.

[0016] Preferably, the step of calculating the tower height and number of towers at each span according to the different spans of adjacent towers along a certain length of line includes:

[0017] Adjust the span between adjacent iron towers;

[0018] Calculate the tower height based on the span between adjacent towers;

[0019] The number of towers is calculated based on the span between adjacent towers.

[0020] Verify whether the span between adjacent towers is sufficient to meet antenna coverage requirements based on the tower height.

[0021] Preferably, the formula for calculating the tower height based on the span between adjacent towers is as follows:

[0022]

[0023] Where h is the tower height, l is the span between adjacent towers, b is the tower head height, γ is the specific load of the wire, σ0 is the minimum linear stress of the sag, and d is the distance from the lowest point of the sag to the ground.

[0024] Preferably, the formula for calculating the number of towers based on the span between adjacent towers is:

[0025]

[0026] Where n is the number of towers, l is the span between adjacent towers, and D is the total length of the line.

[0027] Preferably, the step of verifying whether the span between adjacent towers based on tower height meets the antenna coverage requirements includes:

[0028] Calculate the antenna coverage distance based on the tower height;

[0029] If twice the antenna coverage distance is not less than the span between adjacent towers, then the span between adjacent towers meets the antenna coverage requirement.

[0030] If twice the antenna coverage distance is less than the span between adjacent towers, then the span between adjacent towers does not meet the antenna coverage requirements.

[0031] Preferably, the formula for calculating the antenna coverage distance based on the tower height is:

[0032]

[0033] Where L is the antenna coverage distance, h is the tower height, s is the safety distance between the antenna mounting position and the top of the tower, Φ is the antenna downtilt angle, and a is the half-power angle of the antenna in the vertical plane.

[0034] Based on the same underlying concept, this invention provides a shared tower-based power transmission line planning system, including: a data calculation module and a scheme determination module;

[0035] The data calculation module shown is used to calculate the tower height and number of towers at each span of a certain length of line, based on the different spans of adjacent towers.

[0036] The scheme determination module is used to determine the optimal scheme for a shared tower transmission line based on the span of each adjacent tower, the tower height corresponding to each span, and the number of towers.

[0037] The spacing between adjacent towers is such that it meets the antenna coverage requirements.

[0038] Preferably, the scheme determination module includes: a cost calculation unit and an optimal scheme unit;

[0039] The cost calculation unit is used to calculate the cost of the iron tower based on the tower height and number of iron towers under each span.

[0040] The optimal solution unit is used to determine a shared tower transmission line scheme based on the adjacent tower span, tower height, and number of towers corresponding to the cost-optimal scheme.

[0041] Compared with the closest prior art, the beneficial effects of the present invention are as follows:

[0042] 1. This invention provides a method and system for planning power transmission lines based on shared towers, comprising: calculating the tower height and number of towers at each span according to different spans of adjacent towers in a line of a certain length; determining the optimal scheme for the shared tower power transmission line based on each span of adjacent towers, the tower height corresponding to each span, and the number of towers; wherein the spans of the adjacent towers are all spans that meet the antenna coverage requirements. This invention can determine the most economical scheme that meets the antenna signal coverage requirements after a given line length, which is beneficial to improving the economics of shared tower projects and effectively controlling project costs. Attached Figure Description

[0043] Figure 1 Flowchart of the power transmission line planning method based on the economic efficiency of shared towers in this invention;

[0044] Figure 2 : A schematic diagram of the antenna coverage of the present invention;

[0045] Figure 3 : A schematic diagram of the sag of the transmission line of the present invention;

[0046] Figure 4 : Basic structural diagram of the power transmission line planning system based on the economic efficiency of shared iron towers of the present invention;

[0047] Figure 5 : Detailed structural diagram of the power transmission line planning system based on the economic efficiency of shared iron towers of the present invention. Detailed Implementation

[0048] To better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0049] Example 1

[0050] This invention provides a method for planning transmission lines based on shared towers, such as... Figure 1 As shown, it includes:

[0051] In a certain length of line, the tower height and number of towers are calculated for each span according to the different spans of adjacent towers.

[0052] The optimal scheme for shared tower transmission lines is determined based on the span of adjacent towers, the tower height corresponding to each span, and the number of towers.

[0053] The spacing between adjacent towers is such that it meets the antenna coverage requirements.

[0054] The determination of the optimal scheme for shared tower transmission lines based on the span of adjacent towers, the corresponding tower height, and the number of towers includes:

[0055] Calculate the cost of the iron towers based on the tower height and number of towers under each span.

[0056] Based on the cost-optimal values ​​of adjacent tower span, tower height, and number of towers, a shared tower transmission line scheme is determined.

[0057] The formula for calculating the cost of iron towers based on the tower height and number of towers under each span is as follows:

[0058]

[0059] Where C is the cost of the iron tower, n is the number of iron towers, h is the height of the iron tower, and c is the cost per unit height of the iron tower.

[0060] In a certain length of line, based on the different spans of adjacent towers, the tower height and number of towers are calculated for each span, such as... Figure 2 As shown, it includes:

[0061] Adjust the span between adjacent iron towers;

[0062] Calculate the tower height based on the span between adjacent towers;

[0063] The number of towers is calculated based on the span between adjacent towers.

[0064] Verify whether the span between adjacent towers is sufficient to meet antenna coverage requirements based on the tower height.

[0065] The formula for calculating the tower height based on the span between adjacent towers is as follows:

[0066]

[0067] Where h is the tower height, l is the span between adjacent towers, b is the tower head height, γ is the specific load of the wire, σ0 is the minimum linear stress of the sag, and d is the distance from the lowest point of the sag to the ground.

[0068] The formula for calculating the number of iron towers based on the span between adjacent iron towers is as follows:

[0069]

[0070] Where n is the number of towers, l is the span between adjacent towers, and D is the total length of the line.

[0071] The method of verifying whether the span between adjacent towers based on tower height meets the antenna coverage requirements is as follows: Figure 3 As shown, it includes:

[0072] Calculate the antenna coverage distance based on the tower height;

[0073] If twice the antenna coverage distance is not less than the span between adjacent towers, then the span between adjacent towers meets the antenna coverage requirement.

[0074] If twice the antenna coverage distance is less than the span between adjacent towers, then the span between adjacent towers does not meet the antenna coverage requirements.

[0075] The formula for calculating the antenna coverage distance based on the tower height is as follows:

[0076]

[0077] Where L is the antenna coverage distance, h is the tower height, s is the safety distance between the antenna mounting position and the top of the tower, Φ is the antenna downtilt angle, and a is the half-power angle of the antenna in the vertical plane.

[0078] Specifically, including:

[0079] (1) Under the premise of only considering the cost of the tower itself, the main factors affecting the construction of shared towers are the number of towers n and the tower height h. In order to meet the coverage requirements of communication signals, it is necessary to adjust the appropriate antenna downtilt angle φ and antenna mounting height H. Since communication antennas are installed on adjacent towers, it is necessary to make twice the signal coverage distance L greater than or equal to the span between towers l. The tower height h is also related to the span between towers l. Since there is a safety distance, as the span between towers l decreases, the tower height h will also increase accordingly to increase the height to meet the safety requirements.

[0080] (2) After determining the relationships between the variables in the shared tower, input the values ​​of the known variables, including:

[0081] 2-1) Line length D, i.e., the length of the entire transmission line;

[0082] 2-2) The cost per unit height of the iron tower, c, is used to determine the cost of the iron tower at different heights;

[0083] 2-3) γ is the specific load of the wire, which is related to the wire type and weather conditions;

[0084] 2-4) The minimum linear stress σ0 of the sag is related to the span, conductor type, safety factor and weather conditions;

[0085] 2-5) The safe distance is s, which is the safe distance between the antenna mounting position and the top of the tower;

[0086] 2-6) The minimum safe distance d from the lowest point of the sag to the ground;

[0087] 2-7) The half-power angle α of the antenna's vertical plane is used to determine the antenna's coverage area;

[0088] 2-8) Antenna downtilt angle φ, used to determine the antenna's coverage area;

[0089] (3) Based on past experience, select a gear length l0 as the baseline gear length, and gradually increase and decrease it in 5m increments to obtain a gear length sequence l. i (i = 1, 2, ..., m), and according to the formula We obtain a set of numbers n for iron towers. i (i = 1, 2, ..., m), and according to the formula A set of tower height data h was obtained i (i = 1, 2, ..., m), therefore the antenna height H i (i = 1, 2, ..., m) can be derived from the formula H = hs, and thus according to the formula Obtain the corresponding antenna signal coverage distance L i(i = 1, 2, ..., m) data;

[0090] (4) Determine the value of 2 times L i With gear distance l i Regarding the size relationship, if l ≤ 2L, then retain this group of tower heights h. i Number of iron towers n i With gear distance l i If the data is correct, then remove it;

[0091] (5) According to the formula Calculate the tower cost C corresponding to this set of tower data. i Repeat the above steps to calculate all feasible C. i (i = 1, 2, ..., m), select cost C from this set of tower costs. min The smallest group of iron towers has a height h i Number of iron towers n i With gear distance l i The data represents the most economical shared tower power transmission line solution.

[0092] Example 2

[0093] Based on the same inventive concept, this invention also provides a transmission line planning system based on shared iron towers. Since the principle of these devices in solving technical problems is similar to that of the transmission line planning system based on the economic efficiency of shared iron towers, the repetitions will not be repeated.

[0094] The basic structure of the system is as follows Figure 4 As shown, it includes: a data calculation module and a scheme determination module;

[0095] The data calculation module shown is used to calculate the tower height and number of towers at each span of a certain length of line, based on the different spans of adjacent towers.

[0096] The scheme determination module is used to determine the optimal scheme for a shared tower transmission line based on the span of each adjacent tower, the tower height corresponding to each span, and the number of towers.

[0097] The detailed structure of the power transmission line planning system based on the economic efficiency of shared towers is as follows: Figure 5 As shown.

[0098] The scheme determination module includes: a cost calculation unit and an optimal scheme unit;

[0099] The cost calculation unit is used to calculate the cost of the iron tower based on the tower height and number of iron towers under each span.

[0100] The optimal solution unit is used to determine a shared tower transmission line scheme based on the adjacent tower span, tower height, and number of towers corresponding to the cost-optimal scheme.

[0101] The data calculation module includes: an adjustment unit, a calculation unit, and a verification unit.

[0102] The adjustment unit is used to adjust the span between adjacent iron towers;

[0103] The calculation unit is used to calculate the tower height based on the span between adjacent towers; and to calculate the number of towers based on the span between adjacent towers.

[0104] The verification unit is used to verify, based on the tower height, whether the span between adjacent towers is the span that meets the antenna coverage requirements.

[0105] The verification unit includes: a verification data subunit and a comparison data subunit;

[0106] The verification data subunit is used to calculate the antenna coverage distance based on the tower height;

[0107] The comparison data subunit is used to compare twice the antenna coverage distance with the span of adjacent towers. If twice the antenna coverage distance is not less than the span of adjacent towers, then the span of adjacent towers meets the antenna coverage requirements. If twice the antenna coverage distance is less than the span of adjacent towers, then the span of adjacent towers does not meet the antenna coverage requirements.

[0108] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0109] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0110] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0111] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0112] The above are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of the claims of the present invention pending approval.

Claims

1. A method for planning transmission lines based on shared towers, characterized in that, include: In a certain length of line, the tower height and number of towers are calculated for each span according to the different spans of adjacent towers. The optimal scheme for shared tower transmission lines is determined based on the span of adjacent towers, the tower height corresponding to each span, and the number of towers. The spacing between the adjacent towers is such that it meets the antenna coverage requirements. In a certain length of line, the tower height and number of towers are calculated according to the different spans of adjacent towers, including: Adjust the span between adjacent iron towers; Calculate the tower height based on the span between adjacent towers; The number of towers is calculated based on the span between adjacent towers. Verify whether the span between adjacent towers is sufficient to meet antenna coverage requirements based on the tower height. The formula for calculating the tower height based on the span between adjacent towers is as follows: Where h is the tower height, l is the span between adjacent towers, b is the tower head height, γ is the specific load of the wire, σ0 is the minimum linear stress of the sag, and d is the distance from the lowest point of the sag to the ground.

2. The method for planning transmission lines based on shared towers as described in claim 1, characterized in that, The determination of the optimal scheme for shared tower transmission lines based on the span of adjacent towers, the corresponding tower height, and the number of towers includes: Calculate the cost of the iron towers based on the tower height and number of towers under each span. Based on the cost-optimal values ​​of adjacent tower span, tower height, and number of towers, a shared tower transmission line scheme is determined.

3. The method for planning transmission lines based on shared towers as described in claim 2, characterized in that, The formula for calculating the cost of iron towers based on the tower height and number of towers under each span is as follows: Where C is the cost of the iron tower, n is the number of iron towers, h is the height of the iron tower, and c is the cost per unit height of the iron tower.

4. The method for planning transmission lines based on shared towers as described in claim 1, characterized in that, The formula for calculating the number of iron towers based on the span between adjacent iron towers is as follows: Where n is the number of towers, l is the span between adjacent towers, and D is the total length of the line.

5. The method for planning transmission lines based on shared towers as described in claim 1, characterized in that, The verification of whether the span between adjacent towers based on tower height meets the antenna coverage requirements includes: Calculate the antenna coverage distance based on the tower height; If twice the antenna coverage distance is not less than the span between adjacent towers, then the span between adjacent towers meets the antenna coverage requirement. If twice the antenna coverage distance is less than the span between adjacent towers, then the span between adjacent towers does not meet the antenna coverage requirements.

6. The method for planning transmission lines based on shared towers as described in claim 5, characterized in that, The formula for calculating the antenna coverage distance based on the tower height is as follows: Where L is the antenna coverage distance, h is the tower height, s is the safety distance between the antenna mounting position and the top of the tower, Φ is the antenna downtilt angle, and a is the half-power angle of the antenna in the vertical plane.

7. A power transmission line planning system based on shared towers, characterized in that, include: Data calculation module and scheme determination module; The data calculation module shown is used to calculate the tower height and number of towers at each span of a certain length of line, based on the different spans of adjacent towers. The scheme determination module is used to determine the optimal scheme for a shared tower transmission line based on the span of each adjacent tower, the tower height corresponding to each span, and the number of towers. The spacing between the adjacent towers is such that it meets the antenna coverage requirements. The data calculation module shown specifically includes: Adjust the span between adjacent iron towers; Calculate the tower height based on the span between adjacent towers; The number of towers is calculated based on the span between adjacent towers. Verify whether the span between adjacent towers is sufficient to meet antenna coverage requirements based on the tower height. The formula for calculating the tower height based on the span between adjacent towers is as follows: Where h is the tower height, l is the span between adjacent towers, b is the tower head height, γ is the specific load of the wire, σ0 is the minimum linear stress of the sag, and d is the distance from the lowest point of the sag to the ground.

8. A power transmission line planning system based on shared towers as described in claim 7, characterized in that, The scheme determination module includes: a cost calculation unit and an optimal scheme unit; The cost calculation unit is used to calculate the cost of the iron tower based on the tower height and number of iron towers under each span. The optimal solution unit is used to determine a shared tower transmission line scheme based on the adjacent tower span, tower height, and number of towers corresponding to the cost-optimal scheme.

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