CN102752762A - Design method for reducing base station ground screen area by ground screen effective utilization in lightning stroke - Google Patents

Design method for reducing base station ground screen area by ground screen effective utilization in lightning stroke Download PDF

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Publication number
CN102752762A
CN102752762A CN201210231216XA CN201210231216A CN102752762A CN 102752762 A CN102752762 A CN 102752762A CN 201210231216X A CN201210231216X A CN 201210231216XA CN 201210231216 A CN201210231216 A CN 201210231216A CN 102752762 A CN102752762 A CN 102752762A
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base station
earth electrode
metal earth
rice
closed loop
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刘吉克
孔力
张清泉
牛年增
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China Information Technology Designing and Consulting Institute Co Ltd
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China Information Technology Designing and Consulting Institute Co Ltd
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Abstract

The invention discloses a design method for reducing a base station ground screen area by ground screen effective utilization in lightning stroke. The method comprises the following steps of burying an annular metal grounding body around outer edges of a base station when the ground soil resistivity is less than 1000 ohm m, wherein the burying depth is 0.5-1 m, and the power frequency grounding resistance of the annular metal grounding body is less than 10 ohms; and when the ground soil resistivity is more than 1000 ohm m, selecting one of the two following ways according to the specific environment of the base station: the first way is to bury a 20m*20m rectangular closed-loop metal grounding body around the base station, and bury a vertical metal grounding body downwards along the rectangular closed-loop metal grounding body at 5 meters intervals; the second way is to bury a 10m*10m rectangular closed-loop metal grounding body around the base station, and bury a vertical metal grounding body downwards along the rectangular closed-loop metal grounding body at 5 meters intervals, and bury radiation metal grounding bodies at four corners of the rectangular metal grounding body. The method provided by the invention has the advantage that the ground screen area is greatly reduced under the premise that the lightning protection demand of the base station is met.

Description

The earth mat effective rate of utilization reduces the method for designing of base station the ground network area when utilizing thunderbolt
Technical field
The present invention relates to mobile communication base station the ground network area method for designing, the earth mat effective rate of utilization reduces the method for designing of base station the ground network area when especially relating to the utilization thunderbolt.
Background technology
Along with mobile communication service area network constantly to the extension of suburb, mountain area, traffic backbone, base station geographical environment of living in is all the more abominable, especially in the mountain area; Because soil property is very poor, is mostly rubble soil, decomposed rock or granite, surperficial soil layer is tens to tens cm thicks only; Even be exposed rock, therefore; Make that the earth mat contact resistance of base station does very for a short time be difficulty very; When especially (greater than 1000 Ω .m) build base station, frontier station and repeater in the higher area of some ground resistivities,, almost possibly not reach the designing requirement of standard if continue to use existing lightning protection standard and require design.
Summary of the invention
The object of the invention be to provide a kind of when utilizing thunderbolt the earth mat effective rate of utilization reduce the method for designing of base station the ground network area.
For realizing above-mentioned purpose, the present invention takes following technical proposals:
The earth mat effective rate of utilization reduced the method for designing of base station the ground network area when utilization according to the invention was struck by lightning, and comprised the steps:
At first, adopt earth resistance tester to measure the earth soil resistivity of base station area; When said the earth soil resistivity during less than 1000 Ω .m, bury the endless metal earth electrode underground around the base station outer rim, depth of burying 0.5-1 rice, the power frequency earthing resistance value of said endless metal earth electrode is less than 10 Ω; When said the earth soil resistivity during,, select one of following two kinds of methods to carry out the design of earth mat according to the residing concrete environment in base station greater than 1000 Ω .m:
First method: with ground, base station geometric center point is the center, buries the rectangle closed loop metal earth electrode of length * wide=20 meter * 20 meters underground around the base station, depth of burying 0.5-1 rice; 3-5 rice is buried a vertical metal earth electrode downwards underground along the every interval of said rectangle closed loop metal earth electrode then, and said vertical metal earth electrode and rectangle closed loop metal earth electrode are electrically connected the length 2-3 rice of vertical metal earth electrode;
Second method: with ground, base station geometric center point is the center, buries the rectangle closed loop metal earth electrode of length * wide=10 meter * 10 meters underground around the base station, depth of burying 0.5-1 rice; 3-5 rice is buried a vertical metal earth electrode downwards underground along the every interval of said rectangle closed loop metal earth electrode then, and said vertical metal earth electrode and rectangle closed loop metal earth electrode are electrically connected the length 2-3 rice of vertical metal earth electrode; At last, outwards bury the radiation metal earth electrode underground at four jiaos of along continuous straight runs of rectangle closed loop metal earth electrode, depth of burying 0.5-1 rice, the length 10-20 rice of said radiation metal earth electrode also is electrically connected with rectangle closed loop metal earth electrode.
The invention has the advantages that when base station area the earth soil resistivity during the impact equivalence radius of base station under the lightning current effect during according to thunderbolt designs and do not go to consider the size of power frequency earthing resistance base station the ground network area greater than 1000 Ω .m.Thereby the earth mat after realizing optimizing is enough to loose and lets out lightning current, satisfying under the base station lightning protection demand prerequisite, has reduced the ground network area greatly.Consider that said vertical metal ground connection physical efficiency plays the usefulness of concentrating ground connection expansion to loose and let out lightning current; Therefore; 3-5 rice is buried a vertical metal earth electrode downwards underground along the every interval of said rectangle closed loop metal earth electrode; The vertical junction terrain played to quicken to loose and let out lightning current this moment, rather than was purpose to reduce ground network ground resistance.In four jiaos of radiation metal earth electrodes that attach again with 10-20 rice of rectangle closed loop metal earth electrode, the diffusing stream effect that has further improved thunder and lightning.
The equivalent radius of impact of the present invention is:
Figure 201210231216X100002DEST_PATH_IMAGE001
In the formula, rch-impact equivalent radius, m;
The equivalent radius of r-ground network area;
Figure 548229DEST_PATH_IMAGE002
, m;
A-ground network area, m 2
ρ-soil resistivity, Ω m;
The relative dielectric constant of
Figure 201210231216X100002DEST_PATH_IMAGE003
-soil; Be generally 4~15, be taken as 9 more in the engineering;
Obviously, impact the ratio of equivalent radius and the equivalent radius of ground network area:
Figure 275489DEST_PATH_IMAGE004
Be illustrated under the impact condition, ground network utilize degree.
Table 1 has provided the area (A=100~6400m at different ground resistivity (ρ=250~2000 Ω .m) and earth mat 2) under the condition, the utilance percentage of the equivalent radius of impulse radius and ground network.
Table 1
Figure 201210231216X100002DEST_PATH_IMAGE005
Can find out that from table 1 soil resistivity is low more, the area utilization of earth mat is also low more.
Description of drawings
Fig. 1 is the mobile communication base station earth mat structural representation of the embodiment of the invention 1.
Fig. 2 is the mobile communication base station earth mat structural representation of the embodiment of the invention 2.
Embodiment
Embodiment 1:
The earth mat effective rate of utilization reduced the method for designing of base station the ground network area when utilization according to the invention was struck by lightning, and comprised the steps:
At first, adopt earth resistance tester to measure the earth soil resistivity of base station area; When said the earth soil resistivity during less than 1000 Ω .m, bury the endless metal earth electrode underground around the base station outer rim, depth of burying 0.5-1 rice, the power frequency earthing resistance value of said endless metal earth electrode is less than 10 Ω; When said the earth soil resistivity during greater than 1000 Ω .m, as shown in Figure 1, according to base station 1 residing concrete environment, select following earth mat optimal design:
With base station 1 ground geometric center point is the center, buries the rectangle closed loop metal earth electrode 2 of length * wide=20 meter * 20 meters underground around base station 1, depth of burying 0.5-1 rice; Bury a vertical metal earth electrode 3 downwards underground for 5 meters along said rectangle closed loop metal earth electrode 2 every intervals then, said vertical metal earth electrode 3 is electrically connected the length 2-3 rice of vertical metal earth electrode 3 with rectangle closed loop metal earth electrode 2.Base station 1 earth mat that then rectangle closed loop metal earth electrode 2, vertical metal earth electrode 3 is constituted is connected with the electrical ground system of base station 1 and gets final product.
Embodiment 2:
The earth mat effective rate of utilization reduced the method for designing of base station the ground network area when utilization according to the invention was struck by lightning, and comprised the steps:
At first, adopt earth resistance tester to measure the earth soil resistivity of base station area; When said the earth soil resistivity during less than 1000 Ω .m, bury the endless metal earth electrode underground around the base station outer rim, depth of burying 0.5-1 rice, the power frequency earthing resistance value of said endless metal earth electrode is less than 10 Ω; When said the earth soil resistivity during greater than 1000 Ω .m, as shown in Figure 2, according to base station 1 residing concrete environment, select following grounding grid design:
With base station 1 ground geometric center point is the center, buries the rectangle closed loop metal earth electrode 2 of length * wide=10 meter * 10 meters underground around base station 1, depth of burying 0.5-1 rice; Bury a vertical metal earth electrode 3 downwards underground for 5 meters along said rectangle closed loop metal earth electrode 2 every intervals then, said vertical metal earth electrode 3 is electrically connected the length 2-3 rice of vertical metal earth electrode 3 with rectangle closed loop metal earth electrode 2; At last, outwards bury radiation metal earth electrode 4 underground at 2 four jiaos of along continuous straight runs of rectangle closed loop metal earth electrode, depth of burying 0.5-1 rice, the length 10-20 rice of said radiation metal earth electrode 4 also is electrically connected with rectangle closed loop metal earth electrode 2.Base station 1 earth mat that then rectangle closed loop metal earth electrode 2, vertical metal earth electrode 3, radiation metal earth electrode 4 is constituted is connected with the electrical ground system of base station 1 and gets final product.

Claims (1)

1. one kind is utilized when thunderbolt earth mat effective rate of utilization to reduce the method for designing of base station the ground network area, comprises the steps:
At first, adopt earth resistance tester to measure the earth soil resistivity of base station area; When said the earth soil resistivity during less than 1000 Ω .m, bury the endless metal earth electrode underground around the base station outer rim, depth of burying 0.5-1 rice, the power frequency earthing resistance value of said endless metal earth electrode is less than 10 Ω; It is characterized in that:,, select one of following two kinds of methods to carry out the optimal design of earth mat according to base station (1) residing concrete environment when said the earth soil resistivity during greater than 1000 Ω .m:
First method: with ground, base station (1) geometric center point is the center, buries the rectangle closed loop metal earth electrode (2) of length * wide=20 meter * 20 meters underground around base station (1), depth of burying 0.5-1 rice; 3-5 rice is buried a vertical metal earth electrode (3) downwards underground along the every interval of said rectangle closed loop metal earth electrode (2) then; Said vertical metal earth electrode (3) is electrically connected the length 2-3 rice of vertical metal earth electrode (3) with rectangle closed loop metal earth electrode (2);
Second method: with ground, base station (1) geometric center point is the center, buries the rectangle closed loop metal earth electrode (2) of length * wide=10 meter * 10 meters underground around base station (1), depth of burying 0.5-1 rice; 3-5 rice is buried a vertical metal earth electrode (3) downwards underground along the every interval of said rectangle closed loop metal earth electrode (2) then; Said vertical metal earth electrode (3) is electrically connected the length 2-3 rice of vertical metal earth electrode (3) with rectangle closed loop metal earth electrode (2); At last; Outwards bury radiation metal earth electrode (4) underground at (2) four jiaos of along continuous straight runs of rectangle closed loop metal earth electrode; Depth of burying 0.5-1 rice, the length 10-20 rice of said radiation metal earth electrode (4) also is electrically connected with rectangle closed loop metal earth electrode (2).
CN201210231216XA 2012-07-05 2012-07-05 Design method for reducing base station ground screen area by ground screen effective utilization in lightning stroke Pending CN102752762A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103825113A (en) * 2014-03-17 2014-05-28 国家电网公司 Grounding device for high-soil resistivity region
CN105048434A (en) * 2015-07-07 2015-11-11 广东南方电信规划咨询设计院有限公司 Outdoor optical cross-connection device lightning protection grounding system of wireless far-end TD-LTE network
CN110265800A (en) * 2019-05-21 2019-09-20 中国建筑第八工程局有限公司 Based on the earthing or grounding means and its construction method under the conditions of plate brad supporting
CN114759375A (en) * 2022-05-07 2022-07-15 北京万云科技开发有限公司 Large-scale charge balance surface direct lightning protection device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101035324A (en) * 2007-02-13 2007-09-12 中国移动通信集团广东有限公司 Ground network reconstruction method of the communication base station
JP2007280775A (en) * 2006-04-07 2007-10-25 Shoden Corp Grounding system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007280775A (en) * 2006-04-07 2007-10-25 Shoden Corp Grounding system
CN101035324A (en) * 2007-02-13 2007-09-12 中国移动通信集团广东有限公司 Ground network reconstruction method of the communication base station

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
广东移动通信有限责任公司: "《移动通信基站地网优化设计及新型综合防雷接地解决方案》", 8 September 2005, article "移动通信基站地网优化设计及新型综合防雷接地解决方案" *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103825113A (en) * 2014-03-17 2014-05-28 国家电网公司 Grounding device for high-soil resistivity region
CN103825113B (en) * 2014-03-17 2016-04-20 国家电网公司 High soil resistivity earthing device
CN105048434A (en) * 2015-07-07 2015-11-11 广东南方电信规划咨询设计院有限公司 Outdoor optical cross-connection device lightning protection grounding system of wireless far-end TD-LTE network
CN110265800A (en) * 2019-05-21 2019-09-20 中国建筑第八工程局有限公司 Based on the earthing or grounding means and its construction method under the conditions of plate brad supporting
CN114759375A (en) * 2022-05-07 2022-07-15 北京万云科技开发有限公司 Large-scale charge balance surface direct lightning protection device

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Application publication date: 20121024