CN109217112B - Combined lightning arrester based on disc-shaped multi-gap arc extinguishing lightning protection device - Google Patents
Combined lightning arrester based on disc-shaped multi-gap arc extinguishing lightning protection device Download PDFInfo
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- CN109217112B CN109217112B CN201811160902.6A CN201811160902A CN109217112B CN 109217112 B CN109217112 B CN 109217112B CN 201811160902 A CN201811160902 A CN 201811160902A CN 109217112 B CN109217112 B CN 109217112B
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- gap
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T4/00—Overvoltage arresters using spark gaps
- H01T4/16—Overvoltage arresters using spark gaps having a plurality of gaps arranged in series
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T1/00—Details of spark gaps
- H01T1/02—Means for extinguishing arc
- H01T1/08—Means for extinguishing arc using flow of arc-extinguishing fluid
- H01T1/10—Means for extinguishing arc using flow of arc-extinguishing fluid with extinguishing fluid evolved from solid material by heat of arc
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T4/00—Overvoltage arresters using spark gaps
- H01T4/02—Details
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The invention discloses a combined lightning arrester based on a disc-shaped multi-gap arc extinguishing lightning protection device, and particularly relates to a lightning arrester applied to overhead lines with the grade of more than 10 KV. The structure of the invention is as follows: the upper and lower connecting fittings are respectively arranged on the upper and lower parts of the insulating support rod, the upper spherical electrode is connected with the upper connecting fitting, the lower spherical electrode is connected with the lower connecting fitting, and the 1 st, 2 nd and … … N disc-shaped multi-gap arc extinguishing lightning protection devices are sequentially connected in series between the upper connecting fitting and the lower connecting fitting, wherein N is a natural number, and N is more than or equal to 1 and less than or equal to 8. According to the invention, the lightning current is lengthened, thinned and sprayed out, so that the electric arc is extinguished, the occurrence of interphase short-circuit fault is avoided, and the counterattack probability caused by lightning strike to the lightning conductor is reduced; the lightning surge resistance is strong, the through-flow capacity is large, and the safety is high; the consistency of the discharge gap is good; the structure is simple; after the unique multi-outer gap is subjected to power frequency follow current zero-crossing arc extinction, the medium insulation recovery speed is high, and the arc is not reburned.
Description
Technical Field
The invention relates to a lightning arrester applied to overhead lines with the grade of more than 10KV, in particular to a combined lightning arrester based on a disc-shaped multi-gap arc extinguishing lightning protection device, which can prevent direct lightning striking.
Background
Lightning is an important factor affecting the safety of the transmission line, occupies the first trip of the line fault for a long time, is a natural process of atmospheric activity and is not controllable so far. Overvoltage is caused by lightning strike, and damage to insulators and transmission lines is possibly caused; causing the insulator to flash over. The protection is generally realized by adding a line lightning protector to an overhead line in the electric power department. The line arrester that uses on the overhead line at present mainly has: zinc oxide arrester, protective gap arrester and novel multi-gap arrester. The zinc oxide type lightning arrester is easy to wet, easy to age, high in failure rate and difficult to overhaul and maintain; the protective gap lightning arrester cannot extinguish arc after lightning stroke protective action, and cannot effectively solve tripping and disconnection accidents caused by lightning stroke; the novel multi-gap lightning arrester adopts a single metal spherical electrode, the metal spherical electrode is easily melted and changed to cause short circuit between gaps through multiple times of ablation of power frequency electric arcs, and arc extinguishing gap strings are in a relatively closed space, after the power frequency freewheel is subjected to zero crossing arc extinguishing, dielectric insulation is not easy to recover, and the electric arcs are easy to reburning. Meanwhile, the structure is complex, the production is difficult, the product consistency is poor, and the power frequency discharge and the impact discharge are unstable.
Disclosure of Invention
The invention aims to overcome the defects and shortcomings of the existing line lightning arrester and provides a combined lightning arrester based on a disc-shaped multi-gap arc extinguishing lightning protection device.
The purpose of the invention is realized in the following way:
the device comprises an insulating support rod, an upper connecting fitting, a lower connecting fitting, an upper spherical electrode, a lower spherical electrode and a disc-shaped multi-gap arc extinguishing lightning protection device;
the positions and the connection relations are as follows:
the upper part of the insulating support rod is provided with an upper connecting fitting, the lower part of the insulating support rod is provided with a lower connecting fitting, the upper spherical electrode is connected with the upper connecting fitting, the lower spherical electrode is connected with the lower connecting fitting, and disc-shaped multi-gap arc extinguishing lightning protection devices of No. 1, no. 2 and No. … … N are sequentially connected in series between the upper connecting fitting and the lower connecting fitting, wherein N is a natural number, and N is more than or equal to 1 and less than or equal to 8.
The invention has the following advantages and positive effects:
(1) the lightning current is lengthened, thinned and sprayed out, so that the electric arc is extinguished, the occurrence of interphase short-circuit faults is avoided, and the counterattack probability caused by lightning strike of the lightning conductor is reduced;
(2) the lightning surge resistance is strong, the through-flow capacity is large, and the safety is high;
(3) the discharge gap has good consistency, and the impact discharge and the power frequency discharge are stable;
(4) simple structure, high reliability and easy mass production.
(5) After the unique multi-outer gap is subjected to power frequency follow current zero-crossing arc extinction, the medium insulation recovery speed is high, and the arc is not reburned.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
fig. 2 is a schematic structural view of a disk-shaped multi-gap arc extinguishing lightning protection device E;
fig. 3 is a schematic diagram of a double hemisphere T-shaped ceramic discharge tube 20.
In the figure:
a, insulating support rods;
b-upper connecting hardware fitting;
c, lower connecting hardware fittings;
d1-upper spherical electrode, D2-lower spherical electrode;
e-disc-shaped multi-gap arc extinguishing lightning protection device,
10-a main gap spherical electrode,
11-main gap upper spherical electrode and 12-main gap lower spherical electrode.
20-double hemispheric T-shaped ceramic discharge vessel,
a 21-T-shaped ceramic tube,
211-a hemispherical cavity, wherein,
212-a hollow cylinder, which is provided with a hollow cavity,
22-a graphite hemispherical electrode,
23-metal hemispherical electrode.
30-external gap spherical electrode
31-left spherical electrode, 32-right spherical electrode;
40-an inner insulating layer;
50-an outer insulating layer;
a-arc extinguishing gap string; b-large arc gap string.
Detailed Description
The following detailed description is made with reference to the accompanying drawings and examples:
1. structure of combined lightning arrester
1. Overall (L)
As shown in fig. 1, the arc extinguishing lightning protection device comprises an insulating support rod A, an upper connecting fitting B, a lower connecting fitting C, an upper spherical electrode D1, a lower spherical electrode D2 and a disk-shaped multi-gap arc extinguishing lightning protection device E;
the positions and the connection relations are as follows:
the upper part of the insulating support rod A is provided with an upper connecting fitting B, the lower part of the insulating support rod A is provided with a lower connecting fitting C, an upper spherical electrode D1 is connected with the upper connecting fitting B, a lower spherical electrode D2 is connected with the lower connecting fitting C, and disc-shaped multi-gap arc extinguishing lightning protection devices E of No. 1, no. 2 and No. … … N are sequentially connected in series between the upper connecting fitting B and the lower connecting fitting C, N is a natural number, and N is more than or equal to 1 and less than or equal to 8.
2. Functional component
1) Insulating support rod A
The insulating support rod A is formed by processing glass fiber reinforced plastic or epoxy pipes.
Its function is to play the role of insulating support.
2) Upper connecting fitting B
The insulating support rod A is a metal conductor and is formed by die casting aluminum or copper.
The function of the device is to play a role in connection and fixation.
3) Lower connecting fitting C
The lower connecting fitting C is a metal conductor and is formed by die casting aluminum or copper.
The function of the device is to play a role in connection and fixation.
4) Upper and lower spherical electrodes D1, D2
The upper and lower spherical electrodes D1, D2 are a stainless steel work piece.
The function is an electrode of the arc discharge channel (input, output).
5) Disk-shaped multi-gap arc extinguishing lightning protection device E
As shown in fig. 2, the disk-shaped multi-gap arc extinguishing lightning protection device E is a core component of the present invention, and comprises a main gap spherical electrode 10, a double hemisphere T-shaped ceramic discharge tube 20, an outer gap spherical electrode 30, an inner insulating layer 40 and an outer insulating layer 50;
the positions and the connection relations are as follows:
the arc extinguishing gap string a is formed by connecting 6-10 double hemispheric T-shaped ceramic discharge tubes 20 in series and is in a small arc shape;
the arc extinguishing gap strings a and the outer gap spherical electrodes 30 of 6-8 and 5-7 are sequentially staggered and connected in series to form a large arc gap b, and the head and the tail of the large arc gap b are respectively connected with a main gap upper spherical electrode 11 and a main gap lower spherical electrode 12 of the main gap spherical electrode 10;
an inner insulating layer 40 is uniformly wrapped outside the large arc gap b;
an outer insulating layer 50 is wrapped around the inner insulating layer 40.
The functional components are as follows:
(1) Main gap ball electrode 10
As shown in fig. 1 and 2, the main gap ball electrode 10 includes a main gap upper ball electrode 11 and a main gap lower ball electrode 12;
is a spherical conductor processed by stainless steel, and the spherical diameter is 15-25 mm.
The upper spherical electrode 11 and the lower spherical electrode 12 are respectively connected with the head end and the tail end of the large arc gap b, and serve as input and output ends of discharge.
(2) Double hemisphere T-shaped ceramic discharge tube 20
As shown in fig. 2 and 3, the double-hemispherical T-type ceramic discharge tube 20 includes a T-type ceramic tube 21, a graphite hemispherical electrode 22, and a metal hemispherical electrode 23;
the T-shaped ceramic tube 21 includes a hollow cylinder 212 and a hemispherical cavity 211 which are communicated left and right,
a graphite hemispherical electrode 22 and a metal hemispherical electrode 23 are respectively arranged in the upper cavity and the lower cavity of the hemispherical cavity 211;
the diameter of the hemispherical cavity 211 is 15-19 mm, and the thickness is 9-13 mm; the inner and outer diameters of the hollow cylinder 212 are respectively 2.4-5 mm, 5.6-9 mm;
the radius of the graphite hemispherical electrode 22 is 4-6 mm;
the radius of the metal hemispherical electrode 23 is 4-6 mm.
The arc extinguishing gap string a is formed by connecting a plurality of double hemispheric T-shaped ceramic discharge tubes 20 end to end, and the arc extinguishing gap string a is used for crushing and extinguishing the electric arc.
(3) Outer gap ball electrode 30
As shown in fig. 1, the outer interstitial spherical electrode 30 includes a left spherical electrode 31 and a right spherical electrode 32;
is a spherical conductor processed by stainless steel, and the spherical diameter is 15-25 mm.
The outer gap ball electrode 30 is between the two arc extinguishing gap strings a, which function to help extinguish the arc and to increase the dielectric insulation recovery speed after the arc is extinguished, so that the arc does not reburn.
(4) Inner insulating layer 40
The inner insulating layer 40 is an arc and high temperature resistant reinforced nylon wrap that is molded or injection molded to improve product strength and rigidity.
(5) Outer insulating layer 50
The outer insulating layer 50 is a silicone rubber coating, is in a hub shape, and is formed by die pressing or injection molding, so that the weather resistance and the insulation level of the product are improved.
The working mechanism of the invention is as follows:
when the high-voltage overhead line is struck by lightning, overvoltage is introduced by the main gap spherical electrode 10, and the double-hemispherical T-shaped ceramic discharge tubes 20 are broken down one by one to form a discharge channel; the lightning current is discharged to the ground through the device, and meanwhile, the power frequency voltage can generate power frequency follow current along the discharging channel; when the electric arc passes through the 1 st graphite hemisphere electrode 22 to the 2 nd graphite hemisphere electrode 22, the high-temperature electric arc meets the inner wall of the cooled T-shaped ceramic tube 21 to generate self-expansion air flow, the air flow is sprayed out through the hollow cylinder 212 of the T-shaped ceramic tube 21, the strong self-expansion air flow acts on the electric arc to stretch the length of the electric arc, meanwhile, the temperature is reduced to facilitate the extinction of the electric arc, the electric arc is sprayed out from the orifice of the hollow cylinder 212 along with the air flow to form a quenching arc, the hollow cylinder 212 of each double-hemisphere T-shaped ceramic discharge tube 20 forms a power failure, so that a plurality of double-hemisphere T-shaped ceramic discharge tubes 20 form a plurality of power failures to crush and quench the electric arc, and the re-ignition of the electric arc is avoided, thereby completing a lightning strike discharge action. The graphite hemispherical electrode 22 has large heat capacity, high temperature resistance and high strength, and can bear the high temperature of an electric arc without being vaporized; the graphite hemispherical electrode 22 is adopted, so that the graphite hemispherical electrode cannot be melted due to repeated ablation of lightning current and power frequency current, and safety accidents are caused by short circuit to influence the performance of products; the device can greatly improve the number of times of lightning stroke of the product and prolong the service life.
Claims (1)
1. A combined lightning arrester based on a disk-shaped multi-gap arc extinguishing lightning protection device,
the device comprises an insulating support rod (A), an upper connecting fitting (B), a lower connecting fitting (C), an upper spherical electrode (D1), a lower spherical electrode (D2) and a disc-shaped multi-gap arc extinguishing lightning protection device (E); the insulating support rod (A) is formed by processing glass fiber reinforced plastic or epoxy pipes; the positions and the connection relations are as follows:
an upper connecting fitting (B) is arranged at the upper part of an insulating support rod (A), a lower connecting fitting (C) is arranged at the lower part of the insulating support rod (A), an upper spherical electrode (D1) is connected with the upper connecting fitting (B), a lower spherical electrode (D2) is connected with the lower connecting fitting (C), and disc-shaped multi-gap arc extinguishing lightning protection devices (E) of No. 1, no. 2 and No. … … N are sequentially connected in series between the upper connecting fitting (B) and the lower connecting fitting (C), wherein N is a natural number, and N is more than or equal to 1 and less than or equal to 8;
the method is characterized in that:
the disk-shaped multi-gap arc extinguishing lightning protection device (E) comprises a main gap spherical electrode (10), a double-hemisphere T-shaped ceramic discharge tube (20), an outer gap spherical electrode (30), an inner insulating layer (40) and an outer insulating layer (50);
the positions and the connection relations are as follows:
6-10 double-hemisphere T-shaped ceramic discharge tubes (20) are connected in series to form an arc extinguishing gap string (a) which is in a small arc shape;
6-8 arc extinguishing gap strings (a) and 5-7 outer gap spherical electrodes (30) are sequentially staggered and connected in series to form a large arc gap (b), and a main gap upper spherical electrode (11) and a main gap lower spherical electrode (12) of a main gap spherical electrode (10) are respectively connected to the head and the tail of the large arc gap (b);
an inner insulating layer (40) is uniformly wrapped outside the large arc gap (b);
an outer insulating layer (50) is wrapped outside the inner insulating layer (40);
the main gap spherical electrode (10) comprises a main gap upper spherical electrode (11) and a main gap lower spherical electrode (12);
the upper spherical electrode (11) and the lower spherical electrode (12) of the main gap are all spherical conductors processed by stainless steel, and the spherical diameter is 15-25 mm;
the main gap upper spherical electrode (11) and the main gap lower spherical electrode (12) are respectively connected with the head end and the tail end of the large arc gap (b) and serve as input and output ends of discharge;
the double-hemisphere T-shaped ceramic discharge tube (20) comprises a T-shaped ceramic tube (21), a graphite hemisphere electrode (22) and a metal hemisphere electrode (23);
the T-shaped ceramic tube (21) comprises a hollow cylinder (212) and a hemispherical cavity (211) which are communicated left and right,
a graphite hemispherical electrode (22) and a metal hemispherical electrode (23) are respectively arranged in the upper cavity and the lower cavity of the hemispherical cavity (211);
the diameter of the hemispherical cavity (211) is 15-19 mm, and the thickness is 9-13 mm; the inner and outer diameters of the hollow cylinder (212) are respectively 2.4-5 mm and 5.6-9 mm;
the radius of the graphite hemispherical electrode (22) is 4-6 mm;
the radius of the metal hemispherical electrode (23) is 4-6 mm;
the arc extinguishing gap strings (a) are formed by connecting a plurality of double hemispheric T-shaped ceramic discharge tubes (20) end to end, and the arc extinguishing gap strings are used for crushing and extinguishing the electric arcs;
the outer gap spherical electrode (30) comprises a left spherical electrode (31) and a right spherical electrode (32), the left spherical electrode (31) and the right spherical electrode (32) are all spherical conductors formed by processing stainless steel, the spherical diameter is 15-25 mm, and the outer gap spherical electrode (30) is arranged between two arc extinguishing gap strings (a);
the inner insulating layer (40) is an arc-resistant and high-temperature-resistant reinforced nylon wrapping layer;
the outer insulating layer (50) is a silicon rubber wrapping layer and takes the shape of a hub.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811160902.6A CN109217112B (en) | 2018-09-30 | 2018-09-30 | Combined lightning arrester based on disc-shaped multi-gap arc extinguishing lightning protection device |
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| CN201811160902.6A CN109217112B (en) | 2018-09-30 | 2018-09-30 | Combined lightning arrester based on disc-shaped multi-gap arc extinguishing lightning protection device |
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| CN109217112A CN109217112A (en) | 2019-01-15 |
| CN109217112B true CN109217112B (en) | 2023-06-02 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110098564A (en) * | 2019-04-22 | 2019-08-06 | 中国电力科学研究院有限公司 | A kind of band external series gap lightning arrester and lightning protection system |
| CN112117657A (en) * | 2019-06-19 | 2020-12-22 | 中国石油化工股份有限公司 | Tandem type active lightning arc blowing-out device |
| CN211238809U (en) * | 2019-06-20 | 2020-08-11 | 南宁超伏电气科技有限公司 | Lightning protection device for wind turbine blades of wind power plant |
| CN110176719A (en) * | 2019-06-20 | 2019-08-27 | 武汉爱伦菲尼克斯科技有限责任公司 | A kind of Multiple level arrester with insulator function |
| CN112769042B (en) * | 2020-12-30 | 2021-12-10 | 国网河南省电力公司南阳供电公司 | Method for manufacturing series gap lightning arrester |
| CN115693406B (en) * | 2022-10-25 | 2023-08-15 | 云南电力试验研究院(集团)有限公司 | Structured medium-voltage overhead line lightning protection device |
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| CN106911080A (en) * | 2017-03-02 | 2017-06-30 | 武汉水院电气有限责任公司 | A kind of 10kV multistages short arc potential drop voltage superposition excess voltage preventer |
| CN206595098U (en) * | 2017-03-28 | 2017-10-27 | 武汉爱劳高科技有限责任公司 | Combine disc type Multiple level arrester |
| CN208970930U (en) * | 2018-09-30 | 2019-06-11 | 武汉微创元电子科技有限责任公司 | A kind of combined arrester based on dish type Multiple level arc extinguishing lightning protection device |
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- 2018-09-30 CN CN201811160902.6A patent/CN109217112B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106911080A (en) * | 2017-03-02 | 2017-06-30 | 武汉水院电气有限责任公司 | A kind of 10kV multistages short arc potential drop voltage superposition excess voltage preventer |
| CN206595098U (en) * | 2017-03-28 | 2017-10-27 | 武汉爱劳高科技有限责任公司 | Combine disc type Multiple level arrester |
| CN208970930U (en) * | 2018-09-30 | 2019-06-11 | 武汉微创元电子科技有限责任公司 | A kind of combined arrester based on dish type Multiple level arc extinguishing lightning protection device |
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