CN106229701A - A kind of installation method of graphite-based flexible ground body - Google Patents

A kind of installation method of graphite-based flexible ground body Download PDF

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Publication number
CN106229701A
CN106229701A CN201610621312.3A CN201610621312A CN106229701A CN 106229701 A CN106229701 A CN 106229701A CN 201610621312 A CN201610621312 A CN 201610621312A CN 106229701 A CN106229701 A CN 106229701A
Authority
CN
China
Prior art keywords
graphite
acupuncture
grounding
flexible ground
based flexible
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.)
Pending
Application number
CN201610621312.3A
Other languages
Chinese (zh)
Inventor
张昌
甘艳
唐烈峥
阮江军
黄道春
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.)
STATE GRID CENTER CHINA GRID Co Ltd
Wuhan University WHU
Central China Grid Co Ltd
Original Assignee
STATE GRID CENTER CHINA GRID Co Ltd
Wuhan University WHU
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by STATE GRID CENTER CHINA GRID Co Ltd, Wuhan University WHU filed Critical STATE GRID CENTER CHINA GRID Co Ltd
Priority to CN201610621312.3A priority Critical patent/CN106229701A/en
Publication of CN106229701A publication Critical patent/CN106229701A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/66Connections with the terrestrial mass, e.g. earth plate, earth pin
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors

Abstract

The invention provides the installation method of a kind of graphite-based flexible ground body, including: (1) horizontally embedded grounding body main body and some acupuncture graphite, buried depth is 0.5m ~ 1m;(2) scene is by acupuncture joining of graphite in the identical or different position of grounding body main body, and same position to multi-link two sections of acupuncture graphite, acupuncture graphite is not 0 ° with the angle of grounding body body;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;(3) backfill soil is used to backfill.The inventive method 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

A kind of installation method of graphite-based flexible ground body
Technical field
The invention belongs to power system Lightning protection field, particularly relate to the installation of a kind of graphite-based flexible ground body Method.
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.
Summary of the invention
It is an object of the invention to provide the installation method of a kind of graphite-based flexible ground body reducing impulse earthed resistance.
A kind of installation method of graphite-based flexible ground body, including:
(1) horizontally embedded grounding body main body and some acupuncture graphite, buried depth is 0.5m~1m;
(2) on-the-spot by acupuncture joining of graphite in the identical or different position of grounding body main body, same position to multi-link two Section acupuncture graphite, acupuncture graphite is not 0 ° with the angle of grounding body body;
Described grounding body body and acupuncture graphite are graphite-based flexible ground body, acupuncture graphite and grounding body body Diameter is identical or differs, the 1%~25% of acupuncture graphite a length of grounding body body length;
(3) backfill soil is used to backfill.
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 the present invention, grounding body body and acupuncture graphite are connected by connector, and described connector is U-type groove, anchor ear Or screw;Described connector is the non-metallic material such as plastics, epoxy resin or the metal material such as copper, galvanized steel.It is embodied as In, connector can be selected as required, but to ensure to connect reliably, and reduce as far as possible between acupuncture graphite and grounding body body Contact resistance.
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, installation method of the present invention 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 the concrete schematic diagram of installation method of the present invention.
In figure, 1-grounding body body, 2-acupuncture graphite, 3-beam point.
Detailed description of the invention
A kind of detailed description of the invention and the technique effect of the present invention 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 Laying, buried depth is 1m.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 R=28.86 Ω of grounding body body 1.In the present embodiment, grounding body body 1 is i.e. It is equal to 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 Body 1 and acupuncture graphite 2 are in same level.The impulse earthed resistance accounting for spark effect equally calculates, and impact connects Earth-current waveform is set to 2.6/50 μ s, and peak value is 50kA, obtains the impulse grounding electricity of the present embodiment graphite-based flexible ground body Resistance R1=27.65 Ω.Compare with the conventional graphite base flexible ground body without acupuncture graphite, the stone of the present embodiment band acupuncture graphite The impulse earthed resistance of ink 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. an installation method for graphite-based flexible ground body, is characterized in that, including:
(1) horizontally embedded grounding body main body and some acupuncture graphite, buried depth is 0.5m~1m;
(2) on-the-spot by acupuncture joining of graphite in the identical or different position of grounding body main body, same position to multi-link two sections of pins Thorn graphite, acupuncture graphite is not 0 ° with the angle of grounding body body;
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;
(3) backfill soil is used to backfill.
2. the installation method of graphite-based flexible ground body as claimed in claim 1, is characterized in that:
Described acupuncture graphite is 1~10.
3. the installation method of graphite-based flexible ground body as claimed in claim 1, is characterized in that:
Described a diameter of 10mm~30mm of acupuncture graphite.
4. the installation method of 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. the installation method of 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. the installation method of 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. the installation method of 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. the installation method of graphite-based flexible ground body as claimed in claim 6, is characterized in that:
Described connector is non-metallic material or metal material.
CN201610621312.3A 2016-08-01 2016-08-01 A kind of installation method of graphite-based flexible ground body Pending CN106229701A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610621312.3A CN106229701A (en) 2016-08-01 2016-08-01 A kind of installation method of graphite-based flexible ground body

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610621312.3A CN106229701A (en) 2016-08-01 2016-08-01 A kind of installation method of graphite-based flexible ground body

Publications (1)

Publication Number Publication Date
CN106229701A true CN106229701A (en) 2016-12-14

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111541122A (en) * 2020-05-14 2020-08-14 国网湖北省电力有限公司十堰供电公司 Grounding construction method for graphite-based flexible grounding material tower

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103117459A (en) * 2013-01-31 2013-05-22 广西电网公司电力科学研究院 Reinforced grounding current diffusion device of power transmission line tower
CN104466440A (en) * 2014-12-11 2015-03-25 四川为民科技有限公司 Pulse power grid system lightning protection grounding device for animal protection and installation method thereof
CN105244640A (en) * 2015-11-10 2016-01-13 国家电网公司 Flexible graphite grounding grid

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103117459A (en) * 2013-01-31 2013-05-22 广西电网公司电力科学研究院 Reinforced grounding current diffusion device of power transmission line tower
CN104466440A (en) * 2014-12-11 2015-03-25 四川为民科技有限公司 Pulse power grid system lightning protection grounding device for animal protection and installation method thereof
CN105244640A (en) * 2015-11-10 2016-01-13 国家电网公司 Flexible graphite grounding grid

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111541122A (en) * 2020-05-14 2020-08-14 国网湖北省电力有限公司十堰供电公司 Grounding construction method for graphite-based flexible grounding material tower

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Application publication date: 20161214