CN111767504A - Shared iron tower-based power transmission line planning method and system - Google Patents

Shared iron tower-based power transmission line planning method and system Download PDF

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CN111767504A
CN111767504A CN202010401013.5A CN202010401013A CN111767504A CN 111767504 A CN111767504 A CN 111767504A CN 202010401013 A CN202010401013 A CN 202010401013A CN 111767504 A CN111767504 A CN 111767504A
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span
towers
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赵伟博
刘蕊
董玉明
莫娟
房正刚
李毅刚
徐金
沈鸿冰
杨臻
李想
马裕超
刘湘莅
齐道坤
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State Grid Corp of China SGCC
China Electric Power Research Institute Co Ltd CEPRI
State Grid Henan Electric Power Co Ltd
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China Electric Power Research Institute Co Ltd CEPRI
State Grid Henan Electric Power Co Ltd
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Abstract

The invention provides a shared iron tower-based power transmission line planning method and a system, which comprises the following steps: in a line with a certain length, respectively calculating the height of the iron towers and the number of the iron towers under each span according to different spans of adjacent iron towers; determining an optimal scheme of the shared iron tower transmission line based on each span of adjacent iron towers, the height of the iron tower corresponding to each span and the number of the iron towers; the invention can determine the most economic scheme meeting the antenna signal coverage requirement after the line length is given, is beneficial to improving the economical efficiency of shared iron tower projects and effectively controls project cost.

Description

Shared iron tower-based power transmission line planning method and system
Technical Field
The invention relates to the technical field of power grid engineering design management, in particular to a power transmission line planning method and system based on a shared iron tower.
Background
With the further acceleration of the shared iron tower construction, the main factors influencing the economy of the shared iron tower in the power transmission line planning are the tower span l and the tower height h under the premise of considering the hanging height and the covering distance of the communication antenna, and with the increase of the tower span l, under the premise of unchanging the line length D, the number of the iron towers is reduced, so that the line construction cost is reduced, but the tower height is increased due to the increase of the span, and the tower weight is increased, so that the line construction cost is increased
How to reduce the construction cost on the premise of meeting the communication signal coverage so as to improve the technical and economic benefits of the project becomes a research focus.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides a shared iron tower-based power transmission line planning method and a shared iron tower-based power transmission line planning system.
The purpose of the invention is realized by the following technical scheme:
the invention provides a shared iron tower-based power transmission line planning method, which comprises the following steps:
in a line with a certain length, respectively calculating the height of the iron towers and the number of the iron towers under each span according to different spans of adjacent iron towers;
determining an optimal scheme of the shared iron tower transmission line based on each span of adjacent iron towers, the height of the iron tower corresponding to each span and the number of the iron towers;
and the span distances of the adjacent iron towers are all the span distances meeting the antenna covering requirement.
Preferably, the determining the optimal scheme of the shared iron tower transmission line based on each span of adjacent iron towers, the height of the iron tower corresponding to each span and the number of the iron towers comprises:
calculating the cost of the iron tower according to the height of the iron tower and the number of the iron towers under each span;
and determining a scheme for sharing the transmission lines of the iron towers based on the span of the adjacent iron towers, the height of the iron towers and the number of the iron towers which correspond to the optimal cost.
Preferably, the calculation formula for calculating the cost of the iron tower according to the height of the iron tower and the number of the iron towers at each span is as follows:
Figure BDA0002489475160000021
wherein C is the cost of the iron towers, n is the number of the iron towers, h is the height of the iron towers, and C is the cost of the iron towers with unit height.
Preferably, in a line with a certain length, the method for calculating the height of the iron tower and the number of the iron towers under each span according to different spans of adjacent iron towers comprises the following steps:
adjusting the span of adjacent iron towers;
calculating the height of the iron tower according to the span of the adjacent iron towers;
calculating the number of the iron towers according to the span of the adjacent iron towers;
and verifying whether the span of the adjacent iron towers is the span meeting the antenna coverage requirement or not based on the height of the iron towers.
Preferably, the calculation formula for calculating the height of the iron tower according to the span of the adjacent iron towers is as follows:
Figure BDA0002489475160000022
wherein h is the height of the iron tower, l is the span of the adjacent iron tower, b is the height of the tower head, gamma is the specific load of the electric wire, and sigma is0Is the lowest line stress of the sag, and d is the distance from the lowest point of the sag to the ground.
Preferably, the calculation formula for calculating the number of the iron towers according to the span of the adjacent iron towers is as follows:
Figure BDA0002489475160000023
wherein n is the number of iron towers, l is the span of adjacent iron towers, and D is the total length of the line.
Preferably, the verifying whether the span of the adjacent iron towers is the span meeting the antenna coverage requirement based on the height of the iron towers includes:
calculating an antenna coverage distance according to the height of the iron tower;
if the two times of antenna coverage distance is not less than the span of the adjacent iron towers, the span of the adjacent iron towers meets the span required by the antenna coverage;
and if the two times of antenna coverage distance is less than the span of the adjacent iron towers, the span of the adjacent iron towers does not meet the span required by the antenna coverage.
Preferably, the calculation formula for calculating the antenna coverage distance according to the height of the iron tower is as follows:
Figure BDA0002489475160000031
wherein L is the antenna coverage distance, h is the height of the iron tower, s is the safe distance between the antenna mounting position and the tower top, phi is the antenna downward inclination angle, and a is the half-power angle of the antenna vertical plane.
Based on the same idea, the invention provides a shared iron tower-based power transmission line planning system, which comprises: the system comprises a data calculation module and a scheme determination module;
the data calculation module is used for respectively calculating the height of the iron towers and the number of the iron towers under each span in a line with a certain length according to different spans of adjacent iron towers;
the scheme determining module is used for determining the optimal scheme of the shared iron tower transmission line based on each span of adjacent iron towers, the iron tower height corresponding to each span and the number of the iron towers;
and the span distances of the adjacent iron towers are all the span distances meeting the antenna covering requirement.
Preferably, the scheme determining module includes: a cost calculation unit and an optimal scheme unit;
the cost calculation unit is used for calculating the cost of the iron tower according to the height of the iron tower and the number of the iron towers under each span;
and the optimal scheme unit is used for determining a scheme of sharing the power transmission line of the iron tower based on the span of the adjacent iron towers, the height of the iron tower and the number of the iron towers which correspond to the optimal cost.
Compared with the closest prior art, the invention has the beneficial effects that:
1. the invention provides a shared iron tower-based power transmission line planning method and a system, which comprises the following steps: in a line with a certain length, respectively calculating the height of the iron towers and the number of the iron towers under each span according to different spans of adjacent iron towers; determining an optimal scheme of the shared iron tower transmission line based on each span of adjacent iron towers, the height of the iron tower corresponding to each span and the number of the iron towers; the invention can determine the most economic scheme meeting the antenna signal coverage requirement after the line length is given, is beneficial to improving the economical efficiency of shared iron tower projects and effectively controls project cost.
Drawings
FIG. 1: the invention relates to a power transmission line planning method based on shared iron tower economy, which comprises the following steps of (1) flow chart;
FIG. 2: the antenna coverage of the present invention is schematic;
FIG. 3: the invention discloses a sag schematic diagram of a power transmission line;
FIG. 4: the invention relates to a basic structure diagram of a power transmission line planning system based on the economy of a shared iron tower;
FIG. 5: the invention discloses a detailed structure diagram of a power transmission line planning system based on shared iron tower economy.
Detailed Description
For better understanding of 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 in the embodiments of the present invention.
Example 1
The invention provides a shared iron tower-based power transmission line planning method, as shown in figure 1, comprising the following steps:
in a line with a certain length, respectively calculating the height of the iron towers and the number of the iron towers under each span according to different spans of adjacent iron towers;
determining an optimal scheme of the shared iron tower transmission line based on each span of adjacent iron towers, the height of the iron tower corresponding to each span and the number of the iron towers;
and the span distances of the adjacent iron towers are all the span distances meeting the antenna covering requirement.
The method for determining the optimal scheme of the power transmission line of the shared iron tower based on each span of the adjacent iron towers, the height of the iron tower corresponding to each span and the number of the iron towers comprises the following steps:
calculating the cost of the iron tower according to the height of the iron tower and the number of the iron towers under each span;
and determining a scheme for sharing the transmission lines of the iron towers based on the span of the adjacent iron towers, the height of the iron towers and the number of the iron towers which correspond to the optimal cost.
The calculation formula for calculating the cost of the iron tower according to the height of the iron tower and the number of the iron towers under each span is as follows:
Figure BDA0002489475160000041
wherein C is the cost of the iron towers, n is the number of the iron towers, h is the height of the iron towers, and C is the cost of the iron towers with unit height.
In a line with a certain length, the height of the iron tower and the number of the iron towers under each span are respectively calculated according to different spans of adjacent iron towers, as shown in fig. 2, the method comprises the following steps:
adjusting the span of adjacent iron towers;
calculating the height of the iron tower according to the span of the adjacent iron towers;
calculating the number of the iron towers according to the span of the adjacent iron towers;
and verifying whether the span of the adjacent iron towers is the span meeting the antenna coverage requirement or not based on the height of the iron towers.
The calculation formula for calculating the height of the iron tower according to the span of the adjacent iron towers is as follows:
Figure BDA0002489475160000051
wherein h is the height of the iron tower, l is the span of the adjacent iron tower, b is the height of the tower head, gamma is the specific load of the electric wire, and sigma is0Is the lowest line stress of the sag, and d is the distance from the lowest point of the sag to the ground.
The calculation formula for calculating the number of the iron towers according to the span of the adjacent iron towers is as follows:
Figure BDA0002489475160000052
wherein n is the number of iron towers, l is the span of adjacent iron towers, and D is the total length of the line.
The verifying whether the span of the adjacent iron towers is the span meeting the antenna coverage requirement based on the height of the iron towers as shown in fig. 3 includes:
calculating an antenna coverage distance according to the height of the iron tower;
if the two times of antenna coverage distance is not less than the span of the adjacent iron towers, the span of the adjacent iron towers meets the span required by the antenna coverage;
and if the two times of antenna coverage distance is less than the span of the adjacent iron towers, the span of the adjacent iron towers does not meet the span required by the antenna coverage.
The calculation formula for calculating the antenna coverage distance according to the height of the iron tower is as follows:
Figure BDA0002489475160000053
wherein L is the antenna coverage distance, h is the height of the iron tower, s is the safe distance between the antenna mounting position and the tower top, phi is the antenna downward inclination angle, and a is the half-power angle of the antenna vertical plane.
Specifically, the method comprises the following steps:
(1) on the premise of only considering the cost of the iron towers, the main factors influencing the construction of the shared iron towers are the number n of the iron towers and the height H of the iron towers, in order to meet the coverage requirement of communication signals, the proper downward inclination angle phi of the antenna and the hanging height H of the antenna need to be adjusted, because the adjacent iron towers are provided with the communication antennas, 2 times of signal coverage distance L needs to be larger than or equal to the span L between the iron towers, the height H of the iron towers is also related to the span L of the iron towers, and because of the safety distance, the height H of the iron towers can be correspondingly increased along with the reduction of the span L so as to increase the call height to meet the safety requirement;
(2) after determining the correlation relationship of the variables in the shared iron tower, inputting the values of the known variables, including:
2-1) the line length D, namely the length of the whole transmission line;
2-2) the cost c of the iron tower at unit height is used for determining the cost conditions of the iron tower at different heights;
2-3) gamma is the specific load of the wire and is related to the type of the wire and the meteorological conditions;
2-4) minimum sag line stress σ0Related to span, wire type, safety factor and meteorological conditions;
2-5) the safe distance is s, namely the safe distance between the antenna mounting position and the tower top;
2-6) the minimum safe distance d from the lowest point of the sag to the ground;
2-7) the half-power angle alpha of the vertical plane of the antenna, which is used for determining the coverage area of the antenna;
2-8) an antenna downward inclination angle phi used for determining the coverage range of the antenna;
(3) selecting a gear pitch l according to past experience0As a reference pitch, a sequence l of pitches is obtained by gradually increasing and decreasing in units of 5mi(i ═ 1,2, …, m), and according to the formula
Figure BDA0002489475160000061
Obtaining a group of iron towers ni(i-1, 2, …, m) according to the formula
Figure BDA0002489475160000062
Obtaining a group of height data h of the iron toweri(i 1,2, …, m), so the antenna hangs high Hi(i ═ 1,2, …, m) can be derived from formula H-s, and is thus based on the formula
Figure BDA0002489475160000063
Obtaining corresponding antenna signal coverage distance Li(i ═ 1,2, …, m) data;
(4) judging 2 times of LiAnd a span liIf L is less than or equal to 2L, the height h of the iron tower is reservediThe number n of iron towersiAnd a span liOtherwise, the data is removed;
(5) according to the formula
Figure BDA0002489475160000064
Calculating the iron tower cost C corresponding to the group of iron tower dataiRepeating the above steps to calculate all feasible Ci(i＝1,2,…M) selecting a cost C among the set of tower costsminMinimum height h of iron tower setiThe number n of iron towersiAnd a span liThe data is the most economical scheme for sharing the power transmission line of the iron tower.
Example 2
Based on the same invention concept, the invention also provides a power transmission line planning system based on the shared iron tower, and the principle of solving the technical problems by the devices is similar to the power transmission line planning system based on the economy of the shared iron tower, so repeated parts are not repeated.
The basic structure of the system is shown in fig. 4, and comprises: the system comprises a data calculation module and a scheme determination module;
the data calculation module is used for respectively calculating the height of the iron towers and the number of the iron towers under each span in a line with a certain length according to different spans of adjacent iron towers;
and the scheme determining module is used for determining the optimal scheme of the shared iron tower transmission line based on each span of the adjacent iron towers, the iron tower height corresponding to each span and the number of the iron towers.
The detailed structure of the power transmission line planning system based on the economy of the shared iron tower is shown in fig. 5.
The scheme determination module comprises: a cost calculation unit and an optimal scheme unit;
the cost calculation unit is used for calculating the cost of the iron tower according to the height of the iron tower and the number of the iron towers under each span;
and the optimal scheme unit is used for determining a scheme of sharing the power transmission line of the iron tower based on the span of the adjacent iron towers, the height of the iron tower and the number of the iron towers which correspond to the optimal cost.
The data calculation module includes: the device comprises an adjusting unit, a calculating unit and a verifying unit.
The adjusting unit is used for adjusting the span of adjacent iron towers;
the calculating unit is used for calculating the height of the iron tower according to the span of the adjacent iron towers; calculating the number of the iron towers according to the span of the adjacent iron towers;
and the verification unit is used for verifying whether the span of the adjacent iron towers is the span meeting the antenna coverage requirement or not based on the height of the iron towers.
The authentication unit includes: a verification data subunit and a comparison data subunit;
the verification data subunit is used for calculating the antenna coverage distance according to the height of the iron tower;
the data comparison subunit is configured to compare the two times of antenna coverage distance with the span of the adjacent iron tower, where if the two times of antenna coverage distance is not less than the span of the adjacent iron tower, the span of the adjacent iron tower meets the span required by the antenna coverage, and if the two times of antenna coverage distance is less than the span of the adjacent iron tower, the span of the adjacent iron tower does not meet the span required by the antenna coverage.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may 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, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may 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, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The present invention is not limited to the above embodiments, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention are included in the scope of the claims of the present invention which are filed as the application.

Claims (10)

1. A shared iron tower-based power transmission line planning method is characterized by comprising the following steps:
in a line with a certain length, respectively calculating the height of the iron towers and the number of the iron towers under each span according to different spans of adjacent iron towers;
determining an optimal scheme of the shared iron tower transmission line based on each span of adjacent iron towers, the height of the iron tower corresponding to each span and the number of the iron towers;
and the span distances of the adjacent iron towers are all the span distances meeting the antenna covering requirement.
2. The shared iron tower-based power transmission line planning method according to claim 1, wherein the determining of the optimal scheme of the shared iron tower power transmission line based on each span of adjacent iron towers, the height of the iron tower corresponding to each span and the number of the iron towers comprises:
calculating the cost of the iron tower according to the height of the iron tower and the number of the iron towers under each span;
and determining a scheme for sharing the transmission lines of the iron towers based on the span of the adjacent iron towers, the height of the iron towers and the number of the iron towers which correspond to the optimal cost.
3. The shared iron tower-based power transmission line planning method according to claim 2, wherein the calculation formula for calculating the cost of the iron tower according to the height of the iron tower and the number of the iron towers under each span is as follows:
Figure FDA0002489475150000011
wherein C is the cost of the iron towers, n is the number of the iron towers, h is the height of the iron towers, and C is the cost of the iron towers with unit height.
4. The shared iron tower-based power transmission line planning method according to claim 1, wherein the step of calculating the height of the iron tower and the number of the iron towers under each span respectively in a line with a certain length according to different spans of adjacent iron towers comprises the steps of:
adjusting the span of adjacent iron towers;
calculating the height of the iron tower according to the span of the adjacent iron towers;
calculating the number of the iron towers according to the span of the adjacent iron towers;
and verifying whether the span of the adjacent iron towers is the span meeting the antenna coverage requirement or not based on the height of the iron towers.
5. The shared iron tower-based power transmission line planning method according to claim 4, wherein the calculation formula for calculating the height of the iron tower according to the span of the adjacent iron towers is as follows:
Figure FDA0002489475150000012
wherein h is the height of the iron tower, l is the span of the adjacent iron tower, b is the height of the tower head, gamma is the specific load of the electric wire, and sigma is0Is the lowest line stress of the sag, and d is the distance from the lowest point of the sag to the ground.
6. The shared iron tower-based power transmission line planning method according to claim 4, wherein the calculation formula for calculating the number of iron towers according to the span of adjacent iron towers is as follows:
Figure FDA0002489475150000021
wherein n is the number of iron towers, l is the span of adjacent iron towers, and D is the total length of the line.
7. The shared iron tower-based power transmission line planning method of claim 4, wherein the verifying whether the span of the adjacent iron towers is the span meeting the antenna coverage requirement based on the height of the iron towers comprises:
calculating an antenna coverage distance according to the height of the iron tower;
if the two times of antenna coverage distance is not less than the span of the adjacent iron towers, the span of the adjacent iron towers meets the span required by the antenna coverage;
and if the two times of antenna coverage distance is less than the span of the adjacent iron towers, the span of the adjacent iron towers does not meet the span required by the antenna coverage.
8. The shared iron tower-based power transmission line planning method according to claim 7, wherein the calculation formula for calculating the antenna coverage distance according to the height of the iron tower is as follows:
Figure FDA0002489475150000022
wherein L is the antenna coverage distance, h is the height of the iron tower, s is the safe distance between the antenna mounting position and the tower top, phi is the antenna downward inclination angle, and a is the half-power angle of the antenna vertical plane.
9. The utility model provides a based on sharing iron tower transmission line planning system which characterized in that includes: the system comprises a data calculation module and a scheme determination module;
the data calculation module is used for respectively calculating the height of the iron towers and the number of the iron towers under each span in a line with a certain length according to different spans of adjacent iron towers;
the scheme determining module is used for determining the optimal scheme of the shared iron tower transmission line based on each span of adjacent iron towers, the iron tower height corresponding to each span and the number of the iron towers;
and the span distances of the adjacent iron towers are all the span distances meeting the antenna covering requirement.
10. The shared iron tower-based power transmission line planning system of claim 9, wherein the scheme determining module comprises: a cost calculation unit and an optimal scheme unit;
the cost calculation unit is used for calculating the cost of the iron tower according to the height of the iron tower and the number of the iron towers under each span;
and the optimal scheme unit is used for determining a scheme of sharing the power transmission line of the iron tower based on the span of the adjacent iron towers, the height of the iron tower and the number of the iron towers which correspond to the optimal cost.
CN202010401013.5A 2020-05-13 2020-05-13 Shared iron tower-based power transmission line planning method and system Pending CN111767504A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112423307A (en) * 2020-10-27 2021-02-26 北方工业大学 Arrangement method of communication antenna carrying platform of shared power iron tower

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112423307A (en) * 2020-10-27 2021-02-26 北方工业大学 Arrangement method of communication antenna carrying platform of shared power iron tower

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