CN202352841U - Multipole grounding device for power transmission line tower - Google Patents

Multipole grounding device for power transmission line tower Download PDF

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Publication number
CN202352841U
CN202352841U CN2011205216517U CN201120521651U CN202352841U CN 202352841 U CN202352841 U CN 202352841U CN 2011205216517 U CN2011205216517 U CN 2011205216517U CN 201120521651 U CN201120521651 U CN 201120521651U CN 202352841 U CN202352841 U CN 202352841U
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CN
China
Prior art keywords
grounding
ground connection
line
tower
multipolar
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN2011205216517U
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Chinese (zh)
Inventor
刘渝根
龙小平
陈红光
梁健
曾伟
黄晓刚
吴小舟
冷迪
田资
成文杰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CHONGQING TONGNAN COUNTY POWER SUPPLY CO LTD
Chongqing University
Original Assignee
CHONGQING TONGNAN COUNTY POWER SUPPLY CO LTD
Chongqing University
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Filing date
Publication date
Application filed by CHONGQING TONGNAN COUNTY POWER SUPPLY CO LTD, Chongqing University filed Critical CHONGQING TONGNAN COUNTY POWER SUPPLY CO LTD
Priority to CN2011205216517U priority Critical patent/CN202352841U/en
Application granted granted Critical
Publication of CN202352841U publication Critical patent/CN202352841U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to a grounding device for a power transmission line tower, in particular to a multipole grounding device for the power transmission line tower. The multipole grounding device comprises at least two tower grounding legs and grounding main lines connected with each of the tower grounding legs, wherein each of the grounding main lines is provided with at least one thunder guide line group, and the thunder guide line group is composed of vertical grounding electrodes which are vertically connected with the grounding main lines and are connected to the underground and grounding branch lines which are distributed on two sides of the grounding main lines and are connected with the top ends of the vertical grounding electrodes. According to the multipole grounding device, by means of the structure, inductive effect is reduced, and thunder resistance performance and the adaptability to soil are high.

Description

Multipolar system electric power line pole tower earthing device
Technical field
The utility model relates to the earthing device of electric power line pole tower, especially a kind of inductive effect, the anti-thunder performance of raising and multipolar system electric power line pole tower earthing device strong to soil suitability of reducing.
Background technology
The grounding system of electric power line pole tower is most important to the lightning protection of circuit, and good tower grounding device can be introduced the earth with lightning current smoothly when circuit is struck by lightning.The earth resistance that reduces the tower grounding device is to improve line lightning resisting level, reduces one of major measure of lightning outage rate.
At present, the earthing device of shaft tower generally adopts radiation earth electrode or continuous elongation earth electrode to reduce the earth resistance of earthing device.In the mountain area of high soil resistivity,, often need adopt very long elongation earth electrode for the earth resistance with the tower grounding device is reduced to below the required value.When earth electrode length was excessive, earth electrode itself can present tangible inductive effect, hindered lightning current and flowed to the earth electrode far-end.The impulse earthed resistance of tower grounding device is a tower grounding device discharge capacity evaluation index the most accurately; Because the existence of inductive effect, the continuous elongation earth electrode the impact coefficient that the resistance method can increase the tower grounding device falls, at this moment; Though the power frequency earthing resistance of tower grounding device is minimized to a certain extent; But because the increase of impact coefficient, its impulse earthed resistance might not reduce, and earial drainage speed and discharge capacity not necessarily can improve.Even its impulse earthed resistance also decreases, but the strong inductive effect of continuous elongation earth electrode can make that also earth electrode can not get sufficient utilization, reduces the economy and the practicality of tower grounding device.
In sum, the tower grounding device of prior art, strong, the anti-thunder performance of its inductive effect is low and poor to soil suitability.
Summary of the invention
The purpose of the utility model is in order to overcome the above-mentioned deficiency that prior art exists, a kind of inductive effect, the anti-thunder performance of raising and multipolar system electric power line pole tower earthing device strong to soil suitability of reducing to be provided.
The utility model is realized through following technical scheme, a kind of multipolar system electric power line pole tower earthing device, comprise at least two tower grounding legs, with the ground connection main line of each tower grounding leg conducting; Wherein: said every ground connection main line is provided with at least one group and leads thunder and lightning line group; Lead thunder and lightning line group by being connected conducting and inserting underground vertical grounding electrode and form with the ground connection branch line that is distributed in ground connection main line both sides and is connected conducting with the vertical grounding electrode top with the ground connection main line is vertical.Said tower grounding leg is four, is uniformly distributed with to be arranged on around the shaft tower, between the ground connection branch line of leading thunder and lightning line group near a group of tower grounding leg, connects and forms closed rectangle.
The utility model is owing to the advantage that said structure has is: can not be very long at the ground connection main line, impact coefficient be unlikely under the very big situation, and the earth resistance of tower grounding device is reduced to below the required value.Under the prerequisite that power frequency earthing resistance meets the demands, reduce the impulse earthed resistance of tower grounding device, increase the release ability of lightning current of shaft tower, can adapt to the requirement of different soils resistivity area tower grounding.Reduced inductive effect, improved anti-thunder performance and strong soil suitability.
Description of drawings
The utility model can further specify through the indefiniteness embodiment that accompanying drawing provides.
Fig. 1 is the structural representation of the utility model.
Among the figure: 1, tower grounding leg; 2, vertical grounding electrode; 3, ground connection main line; 4, ground connection branch line.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is described further:
Referring to accompanying drawing 1, the multipolar system electric power line pole tower earthing device among the figure, comprise at least two tower grounding legs 1, with the ground connection main line 3 of each tower grounding leg 1 conducting; Wherein: said every ground connection main line 3 is provided with at least one group and leads thunder and lightning line group; Lead thunder and lightning line group by being connected conducting and inserting underground vertical grounding electrode 2 and form with the ground connection branch line 4 that is distributed in ground connection main line 3 both sides and is connected conducting with vertical grounding electrode 2 tops with ground connection main line 3 is vertical.
In the foregoing description: said tower grounding leg 1 is four, is uniformly distributed with to be arranged on around the shaft tower, between the ground connection branch line 4 of leading thunder and lightning line group near a group of tower grounding leg 1, connects and forms closed rectangle.
In the said structure: the distance of leading between the thunder and lightning line group is 6m.
In the foregoing description: said vertical grounding electrode 2 is the hot galvanizing angle steel of 50 * 50 * 5 ㎜.The length of said ground connection branch line 4 is 6m.
In the said structure: the angle between said ground connection branch line 4 and the ground connection main line 3 is 60 °~75 °.
In the said structure: said ground connection main line 3 surfaces, vertical grounding electrode 2 surfaces and ground connection branch line 4 surfaces are provided with anticorrosive coat.Certainly, buried all parts all should carry out preservative treatment.
During use,, confirm the progression that multipolar system tower grounding device should adopt, promptly lead the group number of thunder and lightning line group according to geological environment, soil resistivity near the shaft tower are investigated.For the area of soil resistivity≤1000 Ω .m, every ground connection main line length should be not less than 24m, and promptly progression is not less than level Four; Be positioned at the area of 1000~2000 Ω .m for soil resistivity, every ground connection main line length should be not less than 30m, and promptly progression is not less than Pyatyi; For the area of soil resistivity>=2000 Ω .m, every ground connection main line length should be not less than 36m, and promptly progression is not less than six grades, can satisfy the grounding requirement of general shaft tower.
In sum, the utility model has reduced inductive effect, has improved anti-thunder performance and strong to soil suitability.

Claims (9)

1. multipolar system electric power line pole tower earthing device, comprise at least two tower grounding legs (1), with the ground connection main line (3) of each tower grounding leg (1) conducting; It is characterized in that: said every ground connection main line (3) is provided with at least one group and leads thunder and lightning line group; Lead thunder and lightning line group by being connected conducting and inserting underground vertical grounding electrode (2) and form with the ground connection branch line (4) that is distributed in ground connection main line (3) both sides and is connected conducting with vertical grounding electrode (2) top with ground connection main line (3) is vertical.
2. multipolar system electric power line pole tower earthing device according to claim 1; It is characterized in that: said tower grounding leg (1) is four; Be uniformly distributed with and be arranged on around the shaft tower, between the ground connection branch line (4) of leading thunder and lightning line group near a group of tower grounding leg (1), connect and form closed rectangle.
3. multipolar system electric power line pole tower earthing device according to claim 1 and 2 is characterized in that: the distance of leading between the thunder and lightning line group is 6m.
4. multipolar system electric power line pole tower earthing device according to claim 1 is characterized in that: the hot galvanizing angle steel of said vertical grounding electrode (2) 50 * 50 * 5 ㎜.
5. multipolar system electric power line pole tower earthing device according to claim 1 is characterized in that: the length of said ground connection branch line (4) is 6m.
6. according to claim 1 or 5 described multipolar system electric power line pole tower earthing device, it is characterized in that: the angle between said ground connection branch line (4) and the ground connection main line (3) is 60 °~75 °.
7. multipolar system electric power line pole tower earthing device according to claim 1 is characterized in that: said ground connection main line (3) surface is provided with anticorrosive coat.
8. multipolar system electric power line pole tower earthing device according to claim 1 is characterized in that: said vertical grounding electrode (2) surface is provided with anticorrosive coat.
9. multipolar system electric power line pole tower earthing device according to claim 1 is characterized in that: said ground connection branch line (4) surface is provided with anticorrosive coat.
CN2011205216517U 2011-12-14 2011-12-14 Multipole grounding device for power transmission line tower Expired - Fee Related CN202352841U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011205216517U CN202352841U (en) 2011-12-14 2011-12-14 Multipole grounding device for power transmission line tower

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011205216517U CN202352841U (en) 2011-12-14 2011-12-14 Multipole grounding device for power transmission line tower

Publications (1)

Publication Number Publication Date
CN202352841U true CN202352841U (en) 2012-07-25

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102983420A (en) * 2012-12-12 2013-03-20 重庆大学 Grounding device for reducing shock ground impedance of electric transmission line tower
CN103036076A (en) * 2012-12-25 2013-04-10 宁波电业局 Device and method for reducing impulse grounding impedance value
CN103457045A (en) * 2013-09-11 2013-12-18 中国南方电网有限责任公司超高压输电公司检修试验中心 Multi-current scattering arm star-shaped grounding electrode topological structure
CN103474791A (en) * 2013-09-29 2013-12-25 国家电网公司 Radial grounding device with impact impedance reducing function
CN105506645A (en) * 2014-09-26 2016-04-20 大唐林州热电有限责任公司 Anticorrosion device and anticorrosion method of ground wire
CN108521031A (en) * 2018-07-03 2018-09-11 国网山东省电力公司惠民县供电公司 A kind of tower grounding device
CN108933341A (en) * 2018-07-03 2018-12-04 国网山东省电力公司惠民县供电公司 A kind of tower grounding device
CN111541121A (en) * 2020-05-14 2020-08-14 国网湖北省电力有限公司十堰供电公司 Method for reducing impact grounding impedance of power transmission line tower

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102983420A (en) * 2012-12-12 2013-03-20 重庆大学 Grounding device for reducing shock ground impedance of electric transmission line tower
CN103036076A (en) * 2012-12-25 2013-04-10 宁波电业局 Device and method for reducing impulse grounding impedance value
CN103036076B (en) * 2012-12-25 2016-02-03 宁波电业局 A kind of reduction Transient grounding resistance value device and method
CN103457045A (en) * 2013-09-11 2013-12-18 中国南方电网有限责任公司超高压输电公司检修试验中心 Multi-current scattering arm star-shaped grounding electrode topological structure
CN103474791A (en) * 2013-09-29 2013-12-25 国家电网公司 Radial grounding device with impact impedance reducing function
CN105506645A (en) * 2014-09-26 2016-04-20 大唐林州热电有限责任公司 Anticorrosion device and anticorrosion method of ground wire
CN108521031A (en) * 2018-07-03 2018-09-11 国网山东省电力公司惠民县供电公司 A kind of tower grounding device
CN108933341A (en) * 2018-07-03 2018-12-04 国网山东省电力公司惠民县供电公司 A kind of tower grounding device
CN108521031B (en) * 2018-07-03 2019-10-11 国网山东省电力公司惠民县供电公司 A kind of tower grounding device
CN111541121A (en) * 2020-05-14 2020-08-14 国网湖北省电力有限公司十堰供电公司 Method for reducing impact grounding impedance of power transmission line tower

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C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20120725

Termination date: 20131214

C17 Cessation of patent right