CN205846263U - Grounding body structure based on graphite-based flexible ground body - Google Patents
Grounding body structure based on graphite-based flexible ground body Download PDFInfo
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- CN205846263U CN205846263U CN201620771173.8U CN201620771173U CN205846263U CN 205846263 U CN205846263 U CN 205846263U CN 201620771173 U CN201620771173 U CN 201620771173U CN 205846263 U CN205846263 U CN 205846263U
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- grounding body
- flexible ground
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Abstract
This utility model provides a kind of grounding body structure based on graphite-based flexible ground body, and including grounding body body and some acupuncture graphite, acupuncture graphite one end is connected on grounding body body, and the angle of acupuncture graphite and grounding body body is not 0；Some acupuncture joining of graphites are in the identical or different position of grounding body body, but same position is to multi-link two sections of acupuncture graphite, and grounding body body and some acupuncture graphite are in same plane；Described grounding body body and acupuncture graphite are graphite-based flexible ground body, and acupuncture graphite is identical with the diameter of grounding body body or differs, the 1% ~ 25% of acupuncture graphite a length of grounding body body length.This utility model connects acupuncture graphite on conventional graphite base flexible ground body, to make full use of spark effect, thus reduces the impulse earthed resistance of graphite-based flexible ground body.
Description
Technical field
This utility model belongs to power system Lightning protection field, particularly relates to a kind of based on graphite-based flexible ground
The grounding body structure of body.
Background technology
The grounding device of transmission line of electricity is to safeguard that power system security reliability service, guarantee electrical equipment are pacified with operations staff
Full basic guarantee and important measures.The earthing pole with good impact characteristics can be that transmission line of electricity provides effective protection, from
And avoid because thunderbolt causes power outage, safe operation and power supply reliability to power system are respectively provided with highly important
Meaning.
Along with development and the raising of stability of power system of China's electrical network, in whole electric power system faults, by
The accident ratio that thunderbolt causes is increase trend.When circuit in thunderbolt, if the impulse earthed resistance of earthing pole is higher, can be online
Insulator chain two ends, road form higher dangerous voltage, and this brings threat not only to the personal safety of operation of power networks personnel, and
Electrical equipment can be destroyed, even cause more serious accident.Due to the restriction of technical conditions, power system grounding design in early days
Have ignored the impact characteristics of earthing pole and only focus on its power frequency characteristic.For a long time, the design considerations code of tower grounding pole " is handed over
The ground connection of stream electric device " (DL/ T621-1997), in code, the basic principle of grounding design is by power frequency earthing resistance and punching
The product hitting coefficient is considered as impulse earthed resistance, describes the impact characteristics of grounding device under lightning current effect with this.But, at thunder
Under the function of current, reflection tower grounding pole impact property is impulse earthed resistance, rather than power frequency earthing resistance.For avoiding accident
Generation, improve the impulse grounding characteristic of earthing pole, earthing pole structure is carried out system optimize design be the most necessary.
Grounding device, under the effect of dash current, is producing transient electromagnetic field about, the soil of close earthing pole
Electric field intensity if it exceeds the critical breakdown strength of soil, then produces spark in the soil near the region of earth conductor and puts
Electricity, soil is breakdown, and spark discharge is formed such that the voltage drop near earthing pole is greatly reduced, and the size of earthing pole is as increasing
Add, thus reduced Transient grounding resistance, here it is spark effect.Earthing pole adds needle prick shape conductor and can make soil
Between soil particle, the distortion of local space electric field intensity is strengthened, and promotes the generation of spark effect, can reduce grounding body theoretically
Impulse earthed resistance.Additionally, graphite-based flexible ground body owing to it is corrosion-resistant, anti-theft, fall impedance, easily construction, cost declining, guarantor
The advantage of the aspects such as environment has obtained increasingly being widely applied in tower grounding.To this end, research how to reduce graphite-based soft
The impulse earthed resistance of property grounding body is significant to the safe and stable operation of transmission line of electricity.
Utility model content
The purpose of this utility model is to provide and a kind of reduces the based on graphite-based flexible ground body of impulse earthed resistance
Grounding body structure.
A kind of grounding body structure based on graphite-based flexible ground body, including grounding body body and some acupuncture graphite, if
Dry acupuncture joining of graphite in the identical or different position of grounding body body, same position to multi-link two sections of acupuncture graphite；Acupuncture
Graphite is not 0 ° with the angle of grounding body body, and grounding body body and some acupuncture graphite are in same plane；Described
Grounding body body and acupuncture graphite are graphite-based flexible ground body, and acupuncture graphite is identical with the diameter of grounding body body or not phase
With, the 1% ~ 25% of acupuncture graphite a length of grounding body body length.
Acupuncture graphite determines according to grounding body body length, and typically grounded body body length is the longest, acupuncture graphite number
Measure the most.Acupuncture graphite is generally 1 ~ 10.
Acupuncture graphite diameter is preferably 10mm ~ 30mm.
Acupuncture graphite is preferably 45 ° ~ 90 ° with the angle of grounding body body.
As preferably, acupuncture joining of graphite position is not more than grounding body body length to the distance of grounding body body head end
Half.
In this utility model grounding body structure, grounding body body and acupuncture graphite are connected by connector, described connection
Part is U-type groove, anchor ear or screw；Described connector is the non-metallic material such as plastics, epoxy resin or the metal such as copper, galvanized steel
Material.In being embodied as, connector can be selected as required, but to ensure to connect reliable, and reduce as far as possible acupuncture graphite with
Contact resistance between grounding body body.
During application, local soil resistivity, grounding body body length, grounding body body diameter and embedding manner thereof need to be considered
Deng practical situation, by repeatedly simulative optimization, determine the quantity of acupuncture graphite, diameter, length, and with the company of grounding body body
The parameter such as connecting point position, closure.
Compared to the prior art, this utility model has the advantage that and beneficial effect:
Conventional graphite base flexible ground body connects acupuncture graphite, to make full use of spark effect, thus reduces graphite
The impulse earthed resistance of base flexible ground body.
Accompanying drawing explanation
Fig. 1 is concrete structure schematic diagram of the present utility model.
In figure, 1-grounding body body, 2-acupuncture graphite, 3-beam point.
Specific embodiment
A kind of detailed description of the invention of the present utility model and technique effect is described in detail below in conjunction with Fig. 1.
Embodiment 1
The a length of 40m of grounding body body 1, a diameter of 28mm, local soil resistivity is 1000 Ω m, uses level to apply
If buried depth is 2m.The impulse earthed resistance accounting for spark effect calculates, and impulse grounding current waveform is set to 2.6/50 μ
S, peak value is 50kA, obtains the impulse earthed resistance of grounding body body 1R=28.86Ω.In the present embodiment, grounding body body 1 is i.e. etc.
It is same as conventional graphite base flexible ground body.
Embodiment 2
The a length of 40m of grounding body body 1, a diameter of 28mm, a length of 2.5m of acupuncture graphite 2, a diameter of 28mm, will
Two sections of acupuncture graphite 2 are all connected to grounding body body 1 same position, i.e. beam point 3, two sections of acupuncture graphite 2 and grounding body body 1
Angle be 90 °, see Fig. 1.Local soil resistivity is 1000 Ω m, uses horizontal laying, and buried depth is 2m, makes grounding body originally
Body 1 and acupuncture graphite 2 are in same level.The impulse earthed resistance accounting for spark effect equally calculates, impulse grounding
Current waveform is set to 2.6/50 μ s, and peak value is 50kA, obtains the impulse earthed resistance of the present embodiment graphite-based flexible ground bodyR 1=27.65Ω.Compare with the conventional graphite base flexible ground body without acupuncture graphite, the graphite of the present embodiment band acupuncture graphite
The impulse earthed resistance of base flexible ground body decreases.
It is to illustrate the application described in above-described embodiment, though literary composition is illustrated by specific term, but not
The protection domain that can limit the application with this, the personage being familiar with this technical field can be right after understanding spirit herein and principle
It carries out changing or revising and reaches equivalence purpose, and this equivalence change and amendment, all should be covered by right institute circle
Determine in category.
Claims (8)
1. a grounding body structure based on graphite-based flexible ground body, is characterized in that:
Including grounding body body and some acupuncture graphite, some acupuncture joining of graphites are in the identical or different position of grounding body body
Put, same position to multi-link two sections of acupuncture graphite；Acupuncture graphite is not 0 ° with the angle of grounding body body, and grounding body body
It is in same plane with some acupuncture graphite；
Described grounding body body and acupuncture graphite are graphite-based flexible ground body, acupuncture graphite and the diameter of grounding body body
Identical or differ, the 1% ~ 25% of acupuncture graphite a length of grounding body body length.
2. grounding body structure based on graphite-based flexible ground body as claimed in claim 1, is characterized in that:
Described acupuncture graphite is 1 ~ 10.
3. grounding body structure based on graphite-based flexible ground body as claimed in claim 1, is characterized in that:
The described a diameter of 10mm ~ 30mm of acupuncture graphite.
4. grounding body structure based on graphite-based flexible ground body as claimed in claim 1, is characterized in that:
Described acupuncture graphite is 45 ° ~ 90 ° with the angle of described grounding body body.
5. grounding body structure based on graphite-based flexible ground body as claimed in claim 1, is characterized in that:
Acupuncture joining of graphite position is not more than the half of grounding body body length to the distance of grounding body body head end.
6. grounding body structure based on graphite-based flexible ground body as claimed in claim 1, is characterized in that:
Described acupuncture graphite one end is connected on grounding body body by connector.
7. grounding body structure based on graphite-based flexible ground body as claimed in claim 6, is characterized in that:
Described connector is U-type groove, anchor ear or screw.
8. grounding body structure based on graphite-based flexible ground body as claimed in claim 6, is characterized in that:
Described connector is non-metallic material or metal material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620771173.8U CN205846263U (en) | 2016-07-21 | 2016-07-21 | Grounding body structure based on graphite-based flexible ground body |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620771173.8U CN205846263U (en) | 2016-07-21 | 2016-07-21 | Grounding body structure based on graphite-based flexible ground body |
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| Publication Number | Publication Date |
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| CN205846263U true CN205846263U (en) | 2016-12-28 |
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| CN201620771173.8U Active CN205846263U (en) | 2016-07-21 | 2016-07-21 | Grounding body structure based on graphite-based flexible ground body |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112415313A (en) * | 2020-11-10 | 2021-02-26 | 河南四达电力设备股份有限公司 | Method and system for measuring thermal stability coefficient of graphite-based flexible grounding body |
-
2016
- 2016-07-21 CN CN201620771173.8U patent/CN205846263U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112415313A (en) * | 2020-11-10 | 2021-02-26 | 河南四达电力设备股份有限公司 | Method and system for measuring thermal stability coefficient of graphite-based flexible grounding body |
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| GR01 | Patent grant |