CN203013424U - 500-kilovolt overhead transmission line strain-string parallel-gap anti-lighting protective device - Google Patents
500-kilovolt overhead transmission line strain-string parallel-gap anti-lighting protective device Download PDFInfo
- Publication number
- CN203013424U CN203013424U CN 201220688441 CN201220688441U CN203013424U CN 203013424 U CN203013424 U CN 203013424U CN 201220688441 CN201220688441 CN 201220688441 CN 201220688441 U CN201220688441 U CN 201220688441U CN 203013424 U CN203013424 U CN 203013424U
- Authority
- CN
- China
- Prior art keywords
- transmission line
- shading ring
- string
- insulator string
- overhead transmission
- 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 - Lifetime
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 29
- 230000001681 protective effect Effects 0.000 title abstract 3
- 239000012212 insulator Substances 0.000 claims abstract description 52
- 239000000725 suspension Substances 0.000 claims abstract description 8
- 239000002131 composite material Substances 0.000 claims description 11
- 208000005168 Intussusception Diseases 0.000 claims description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- 239000012211 strain insulator Substances 0.000 description 3
- 208000025274 Lightning injury Diseases 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 241000272165 Charadriidae Species 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005246 galvanizing Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Images
Landscapes
- Insulators (AREA)
Abstract
The utility model relates to a 500-kilovolt overhead transmission line strain-string parallel-gap anti-lighting protective device, belonging to the technical field of transmission line anti-lighting protection. According to the utility model, a parallel gap is additionally arranged on a conventional device and comprises a grounding-side rod-shaped structure arcing horn. The included angle between the grounding-side rod-shaped structure arcing horn and a yoke plate is [theta], and the [theta] ranges from 45 degrees to 60 degrees. The grounding-side rod-shaped structure arcing horn is fixed through the yoke plate onto grounding-side suspension rods. An included angle between a front/rear voltage-balancing shielding ring and a horizontal line is [alpha], and the [alpha] ranges from 15 degrees to 30 degrees. The 500-kilovolt overhead transmission line strain-string parallel-gap anti-lighting protective device provided by the utility model is applicable to 500-kilovolt overhead transmission lines and is capable of functioning to protect line insulator strings when the lines are struck by lightning and to guarantee the success of reclosing after the occurrence of lightning accidents.
Description
Technical field
The utility model relates to a kind of 500 kilovolts of overhead transmission line strain insulator-string parallel gap lightning protection devices, belongs to transmission line lightning-protection engineering field.
Background technology
Along with the increase of transmission line rated voltage, the corresponding raising of ratio that the lightning stroke trip accident of adding up both at home and abroad accounts for total number of accident, 500 kilovolts of China and the lightning strike accident of following electric pressure transmission line just account for more than 50% of total accident.Thunder and lightning cause power frequency arc that the insulator string flashover produces can calcination, damage the surface insulation layer of insulator string, serious situation even may cause insulator string occur disrumpent feelings, fall string, greatly affected the safe operation of transmission line.Therefore, the overhead transmission line fault that causes due to thunderbolt is one of major failure type of overhead transmission line.
Existing Lightning Protection on Power Transmission Lines measure is mainly " blocking type " protected mode, and its core concept is to improve as much as possible the lightning withstand level of circuit, reduces tripping rate with lightning strike.Along with the reinforcement of electrical network framework, the generally application of relaying protection and reclosing device can adopt " leading-type " lightning protection to replenish as the strong of " blocking type " lightning protection measures, with the low small probability problem of lightning that solves transmission line that drops into.Under " leading-type " lightning protection thought guidance, proposed often be struck by lightning or the electric transmission line isolator of pollution flashover on parallel connection gaps is installed the lightning protection scheme.
The principle of insulator parallel connection gaps lightning protection is: in insulator string two ends pair of metal electrodes (claiming again arcing horn or arc leading angle) in parallel, consist of and protect the gap, usually protect the distance in gap long less than the string of insulator string.When overhead transmission line is struck by lightning, produce very high lightning overvoltage on insulator string, but because of the lightning impulse discharge voltage in the protection gap discharge voltage lower than insulator string, therefore at first discharge in the protection gap.The power frequency arc that continues by the formed discharge channel of parallel connection gaps, is directed to the arcing horn end under electric power and thermal stress effect, be fixed on the arcing horn cigarette burning, thereby the protection insulator avoids the electric arc calcination.Its core concept can be summarized as and allow circuit that certain tripping rate with lightning strike is arranged, and adopts inter space device in parallel with insulator string, and thunder energy is discharged by gap discharge, dredges power frequency arc.Though lightning stroke flashover is arranged, and reclosing can be successful, without permanent fault.
Summary of the invention
The utility model purpose is to propose a kind of parallel clearance lightning protection device that is applicable to 500 kilovolts of overhead transmission line strain insulator-strings; change the structure of existing lightning protection device; to change the path of electric arc in the lightning overvoltage discharge process, reach the purpose of the built on stilts transmission circuit insulator string of protection.
500 kilovolts of overhead transmission line strain insulator-string parallel gap lightning protection devices that the utility model proposes, this lightning protection device comprises a plurality of composite insulators, the mutual intussusception of a plurality of composite insulators connects, form front insulator string and rear insulator string, each is connected the ground connection side of front insulator string and rear insulator string with suspension rod, the side of wire was of front insulator string and the side of wire was of rear insulator string respectively are equipped with front shading ring and the rear shading ring of all pressing of all pressing, and the front shading ring of all pressing is relative with the triangle yoke plate fixing by bracing frame with the rear shading ring of all pressing; Characterized by further comprising a parallel connection gaps, described parallel connection gaps comprises the arcing horn of a ground connection paraphysis shape structure, and the angle between ground connection paraphysis shape structure arcing horn and yoke plate is θ, θ=45 °～60 °; The arcing horn of described ground connection paraphysis shape structure is fixed on by yoke plate on the suspension rod of ground connection side, and described front all to press shading ring and rear shading ring and the horizontal angle of all pressing be α, α=15 °～30 °.
500 kilovolts of overhead transmission line strain insulator-string parallel gap lightning protection devices that the utility model proposes; be applicable to 500 kilovolts of overhead transmission lines, when circuit is struck by lightning, can play the effect of protection circuit insulator string; and after lightning strike accident occurs, can guarantee the reclosing success.
Description of drawings
Fig. 1 is the existing two string of the 500 kilovolts of overhead transmission line strain insulators outline drawing that parallel connection gaps is not installed.
Fig. 2 is that the A of Fig. 1 is to view.
Fig. 3 is the structural representation of the parallel gap lightning protection device of 500 kilovolts of overhead transmission line strain insulator-strings the utility model proposes.
Fig. 4 is that the A of Fig. 3 is to view.
in Fig. 1-Fig. 4, the 1st, composite insulator, the 2nd, all press shading ring, the 3rd, attachment bolt, the 4th, suspension rod, the 5th, bracing frame, the 6th, the triangle yoke plate, the 7th, yoke plate, the 8th, the arcing horn of ground connection paraphysis shape structure, D1 is the insulator umbrella maximum gauge, D2 is the centre distance of two insulator strings, D3 is two parallel shading ring distances of all pressing when parallel connection gaps is not installed, L is that the composite insulator string string is long, L1 is the shortest air gap distance of parallel connection gaps, Dc1 is when all pressing shading ring simultaneously as the side of wire was arcing horn and insulator string center of maximum distance, Dc2 be when all pressing shading ring simultaneously as the side of wire was arcing horn and the insulator string minimum centers-distance from, Dc3 all presses shading ring plane longest distance, before α is, after all press shading ring and horizontal angle, θ is the arcing horn of ground connection paraphysis shape structure and the angle between yoke plate.
Embodiment
500 kilovolts of overhead transmission line strain insulator-string parallel gap lightning protection devices that the utility model proposes, its structure as shown in Figure 1, this lightning protection device comprises a plurality of composite insulators 1, the mutual intussusception of a plurality of composite insulators connects, form front insulator string and rear insulator string, each is connected the ground connection side of front insulator string and rear insulator string with suspension rod 4, the side of wire was of front insulator string and the side of wire was of rear insulator string respectively are equipped with front shading ring 2 and the rear shading ring of all pressing of all pressing, before all press shading ring relative with triangle yoke plate 6 fixing by bracing frame 5 with the rear shading ring 2 of all pressing.Also comprise a parallel connection gaps, parallel connection gaps comprises the arcing horn 8 of a ground connection paraphysis shape structure, and the angle between ground connection paraphysis shape structure arcing horn 8 and yoke plate 7 is θ, θ=45 °～60 °.The arcing horn of ground connection paraphysis shape structure is fixed on by yoke plate 7 on the suspension rod 4 of ground connection side, frontly all presses shading ring 2 and rear all to press shading ring 2 and horizontal angle be α, α=15 °～30 °.
The utility model achieves the above object by the following technical programs: a kind of 500 kilovolts of overhead transmission line strain insulator-string parallel gap lightning protection devices are provided; this lightning protection device comprises insulator string and parallel connection gaps; parallel connection gaps all presses shading ring and ground connection paraphysis shape arcing horn jointly to form by side of wire was, and described side of wire was all presses shading ring and ground connection paraphysis shape arcing horn to be contained in respectively the two ends of insulator string.
Described strain insulator string is comprised of 29 composite insulators of two strings; The end of described ground connection paraphysis shape electrode upwarps, and caliber is 50mm, with horizontal angle theta be 45 °～60 °, require top car circle.
Below with reference to accompanying drawing also in conjunction with the embodiments, describe the utility model in detail.
Fig. 1 is the existing two string of the 500 kilovolts of overhead transmission line strain insulators outline drawing that parallel connection gaps is not installed.Long L=H1 * the 29=155 of composite insulator string string * 29=4495mm wherein.The diameter D1=400mm of full skirt, two insulator string centre distance D2=500mm.Side of wire was all presses shading ring to be parallel relation, both distance B 3=1180mm.
Fig. 2 is that the A of Fig. 1 is to view.Wherein, all press the large ring radius of shading ring to represent with R1, R1=325mm, little ring radius represents with R2, R2=224mm.
Fig. 3 is the structural representation of the parallel gap lightning protection device of 500 kilovolts of overhead transmission line strain insulator-strings the utility model proposes.Wherein can see from vertical view, insulator string is comprised of two each 29 composite insulators of string, and string is long to be represented with L.The shortest air gap distance of parallel connection gaps represents with L1.Ground connection side parallel connection gaps uses the clavate structure, and direction is parallel with the insulator string orientation, and horizontal offset distance represents with Dg, probes into the degree of depth and represents with Hg.Side of wire was is connected to two and all presses shading ring, is arranged in parallel differently from all pressures shading ring shown in Fig. 3, and this all presses shading ring and horizontal line α in an angle, and angle is 15 °～30 °.
Fig. 4 is that the A of Fig. 3 is to view.See from end view, all press the large ring radius of shading ring to represent with R1, R1=325mm, little ring radius represents with R2, R2=224mm.All press shading ring to support rib by diameter
Aluminium-alloy pipe form, all press the shading ring diameter to be
Aluminium-alloy pipe, wall thickness is 5mm.Large ring radius represents with R1, R1=325mm, and little ring radius represents with R2, R2=224mm.All press the shading ring weld all to need to polish specially.
To the polishing of parallel connection gaps outer surface, so that smooth surface, and integral body is carried out hot galvanizing.Arcing horn uses diameter to be the aluminium-alloy pipe of 50mm, and wall thickness is 1.2mm.Dg and Hg represent respectively the horizontal offset distance of this arcing horn and probe into the degree of depth.This arcing horn and two insulator strings all are connected on same yoke plate.
Claims (1)
1. one kind 500 kilovolts overhead transmission line strain insulator-string parallel gap lightning protection devices, this lightning protection device comprises a plurality of composite insulators, the mutual intussusception of a plurality of composite insulators connects, form front insulator string and rear insulator string, each is connected the ground connection side of front insulator string and rear insulator string with suspension rod, the side of wire was of front insulator string and the side of wire was of rear insulator string respectively are equipped with front shading ring and the rear shading ring of all pressing of all pressing, and the front shading ring of all pressing is relative with the triangle yoke plate fixing by bracing frame with the rear shading ring of all pressing; Characterized by further comprising a parallel connection gaps, described parallel connection gaps comprises the arcing horn of a ground connection paraphysis shape structure, and the angle between ground connection paraphysis shape structure arcing horn and yoke plate is θ, θ=45 °～60 °; The arcing horn of described ground connection paraphysis shape structure is fixed on by yoke plate on the suspension rod of ground connection side, and described front all to press shading ring and rear shading ring and the horizontal angle of all pressing be α, α=15 °～30 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220688441 CN203013424U (en) | 2012-12-13 | 2012-12-13 | 500-kilovolt overhead transmission line strain-string parallel-gap anti-lighting protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220688441 CN203013424U (en) | 2012-12-13 | 2012-12-13 | 500-kilovolt overhead transmission line strain-string parallel-gap anti-lighting protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203013424U true CN203013424U (en) | 2013-06-19 |
Family
ID=48604991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220688441 Expired - Lifetime CN203013424U (en) | 2012-12-13 | 2012-12-13 | 500-kilovolt overhead transmission line strain-string parallel-gap anti-lighting protective device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203013424U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107230534A (en) * | 2017-07-20 | 2017-10-03 | 云南电网有限责任公司电力科学研究院 | A kind of 220kV single ball-type parallel connection clearance devices used for transmission line |
| CN108592766A (en) * | 2018-04-04 | 2018-09-28 | 国网冀北电力有限公司廊坊供电公司 | A kind of grounding-for-lightning device is from windup-degree measuring instrument |
-
2012
- 2012-12-13 CN CN 201220688441 patent/CN203013424U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107230534A (en) * | 2017-07-20 | 2017-10-03 | 云南电网有限责任公司电力科学研究院 | A kind of 220kV single ball-type parallel connection clearance devices used for transmission line |
| CN108592766A (en) * | 2018-04-04 | 2018-09-28 | 国网冀北电力有限公司廊坊供电公司 | A kind of grounding-for-lightning device is from windup-degree measuring instrument |
| CN108592766B (en) * | 2018-04-04 | 2023-10-27 | 国网冀北电力有限公司廊坊供电公司 | Lightning protection earthing device is from torsion angle measuring apparatu |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201765890U (en) | Parallel gap lightning protection device for overhead transmission line | |
| CN203423465U (en) | Power distribution overhead power transmission line lightning-induced overvoltage lightning protection device | |
| CN101697299B (en) | Lightning protection insulator for insulated conductor of overhead line | |
| CN102930943A (en) | Pure-air serial gap type extra-high voltage line lightening arrester | |
| CN101202431B (en) | Insulation tower head for power distribution network overhead line | |
| CN107732663B (en) | Coulomb force traction ball-type compressed jet airflow arc extinguishing device and ball-type arcing horn | |
| CN203013424U (en) | 500-kilovolt overhead transmission line strain-string parallel-gap anti-lighting protective device | |
| CN210349489U (en) | Multiple series gap lightning stroke flashover protector | |
| CN203014162U (en) | 500-kilovolt overhead transmission line suspension-string parallel-gap anti-lighting protective device | |
| CN210245185U (en) | Windage yaw jumper wire prevention insulator for 500kV transmission line | |
| CN201274402Y (en) | Damping dual needle type winding attach prevention lightning arrester | |
| CN206480440U (en) | A kind of central lightning stroke flashover arc extinguishing lightning protection device of compression line span | |
| CN206595546U (en) | A kind of voltage protector with disconnector | |
| CN103956705A (en) | Full-coverage-type lightning protection device for overhead transmission lines | |
| CN202042294U (en) | Multi-gap self-expansion strong airflow arc extinction lightning-protection protecting device | |
| CN201260026Y (en) | Lightning protector with series interval | |
| CN203826907U (en) | Full-coverage overhead transmission line lightning protection apparatus | |
| CN205646747U (en) | 800 kilovolt direct current line gap installation device | |
| CN201611762U (en) | Lightning arrester for tractive power supply system of electrified railway | |
| CN209844207U (en) | Multi-gap lightning arrester with insulator function | |
| CN203496704U (en) | Lightning strike restraining type overhead contact system of electrified rail tractive power supply system | |
| CN202996445U (en) | Disconnector-containing type compound insulated column-type lightning-protection insulator | |
| CN202796277U (en) | No-freewheeling arc lightning protection gap protecting device | |
| CN104734102A (en) | Alternating current transmission line iron tower | |
| CN201514819U (en) | Lightning protection insulator for insulated conductor for overhead line |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130619 |