CN202395408U - Adjustable gap lightning protection device used for electric power system power transmission line - Google Patents

Adjustable gap lightning protection device used for electric power system power transmission line Download PDF

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Publication number
CN202395408U
CN202395408U CN2011204670201U CN201120467020U CN202395408U CN 202395408 U CN202395408 U CN 202395408U CN 2011204670201 U CN2011204670201 U CN 2011204670201U CN 201120467020 U CN201120467020 U CN 201120467020U CN 202395408 U CN202395408 U CN 202395408U
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China
Prior art keywords
adjustable
transmission line
electrode
lightning protection
spheric electrode
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Expired - Fee Related
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CN2011204670201U
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Chinese (zh)
Inventor
李景禄
易小飞
廖志华
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Individual
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Abstract

The utility model discloses an adjustable gap lightning protection device used for an electric power system power transmission line. The adjustable gap lightning protection device is composed of a fixing hardware (1), wiring spherical electrodes (2), grounding spherical electrodes (3), and an adjustable fixing support (4). The fixing hardware (1) is fixed and clamped on a lead of a power transmission line and is welded with the wiring spherical electrodes (2). The wiring spherical electrodes (2) are electrically connected with the lead (5) of the power transmission line via the fixing hardware (1). The grounding spherical electrodes (2) are fixed on an upper end of a suspension insulator (6) via the adjustable fixing support (4), are electrically connected with a tower cross beam (7), and are connected with the ground. The gap size can be adjusted, and the gap can be adjusted along with the working condition of the insulator, so the gap size failure caused by the change of the working condition of the insulator can be prevented. The gap adopts a spherical gap, and the lightning disruptive discharge voltage of the spherical gap discharge is small in dispersity. The adjustable gap lightning protection device has the advantages of excellent lightning protection effect, wide application scope, simple structure, low cost, and easy maintenance.

Description

The adjustable clearance lightning protection device that is used for power system transmission line
Technical field
The utility model relates to the electric power safety field, is specifically related to be used for the adjustable clearance lightning protection device of power system transmission line.
Background technology
The general transmission range of the transmission line of electric power system landform long, process is intricate, is struck by lightning easily.The direct lightning strike overvoltage and the lightning induced voltage that cause because of thunderbolt form the metallic short circuit passage at two flashovers mutually or between the three-phase line of transmission line especially easily, can cause thousands of amperes of power frequency continued flows, and arc energy will increase suddenly, may blow lead; In addition; The lead of transmission line generally is connected on the shaft tower of ground connection through insulator string; Therefore produce the electric arc of creeping between lead and the ground connection shaft tower easily because of thunderbolt; These electric arcs often occur in nearest place between lead and the shaft tower---be insulator string near, therefore cause insulator string to burn easily, cause accidents such as transmission line tripping operation power failure.
Because it is the electric pressure of transmission line is higher usually, therefore complicated aspect lightning protection measures.The transmission line lightning protection is general to be adopted and sets up lightning conducter, reduces pole tower ground resistance, reinforced insulation, installs coupling ground wire additional, method such as Transmission Line Arrestor is installed; The core concept of these safeguard measures is to improve the lightning withstand level of circuit as far as possible, reduces tripping rate with lightning strike.But they still have certain limitation.Set up lightning conducter the probability that reduces the thunderbolt lead is played important effect, but occur sometimes because of the shielding failure phenomenon in the mountain area; Reducing pole tower ground resistance has decisive role to reducing thunderbolt counterattack trip-out rate, but bigger in mountain area and high soil resistivity enforcement difficulty; Reinforced insulation can improve lightning withstand level, but receives the shaft tower size restrictions; Install coupling ground wire additional and can improve the mountain route lightning withstand level, but performance difficulty; The installation Transmission Line Arrestor is effective, is prone to hit Duan Yi and hits a little or be prone to hit phase but invest the huge circuit thunder and lightning that can only be used for; Only adopting under the situation of traditional lightning protection mode at present, still there is certain stroke-incidence rate in the aerial power transmission line of China's electrical network, particularly at southern area because the electric network fault that causes of thunderbolt still accounts for significant proportion.
Summary of the invention
The utility model is to the above-mentioned shortcoming of prior art, and a kind of can lightning protection effect good, wide accommodation, the adjustable clearance lightning protection device that is used for power system transmission line simple in structure, with low cost, easy to maintenance are provided.
In order to solve the problems of the technologies described above; The technical scheme that the utility model adopts is: a kind of adjustable clearance lightning protection device that is used for power system transmission line; The lead of said transmission line is connected on the electric power line pole tower through insulator string; It is characterized in that: it is by fixedly gold utensil, wiring spheric electrode, ground connection spheric electrode and adjustable fixed support constitute; Said ground connection spheric electrode is connected on the adjustable fixed support through the adjustable electrode connecting rod, adjustable fixed support through screw in suspension insulator upper end, and with shaft tower on keep ground connection; Said fixedly gold utensil is clamped and fastened on the lead and supports the wiring spheric electrode, and the wiring spheric electrode is through fixedly gold utensil and lead conducting; Said wiring spheric electrode and ground connection spheric electrode are relative and its gap is shorter than the distance of insulator string.
Further improvement as the utility model:
Said adjustable fixed support supports band steel by copper facing and the adjustable electrode connecting rod constitutes; Copper facing is supported band steel and is provided with and the corresponding screw of adjustable electrode connecting rod; The adjustable electrode connecting rod is connected in copper facing through said screw and supports on the band steel, and said ground connection spheric electrode is fixedly connected with the adjustable electrode connecting rod;
Said fixedly gold utensil is made up of fixed electrode connecting rod, tooth arch and balance weight; Said tooth arch is made up of last tooth arch and following tooth arch; Last tooth arch and following tooth arch pass through bolt or rivet with the tight clamping of the metal conductor portion of lead; Said fixed electrode connecting rod one end and the welding of last tooth arch, the other end and the welding of wiring spheric electrode;
Said wiring spheric electrode and ground connection spheric electrode are antirust spheric electrode;
The radius of said antirust spheric electrode is 25mm;
Said wiring spheric electrode apart from insulator string apart from more than the 500mm;
Employing the utlity model has following advantage:
Have the design in gap in the utility model between wiring spheric electrode and the ground connection spheric electrode; Make when transmission line is struck by lightning that after voltage difference reaches certain level, can discharge prior to insulator string in this gap; Deflect from electric arc insulator and between two spheric electrodes, burn along the insulator string surface combustion; Therefore can avoid insulator string and circuit to be burnt, keep the effect of the normal operation of circuit, thereby can thoroughly solve the thunderbolt damage of lead and the problem of broken string by thunderbolt.Owing to keep the above distance of 500mm between insulator string and the wiring spheric electrode; And adjustable support bracket fastened circular arc design; Make the power frequency arc that continues under the effect of electric power and thermal stress, can outwards extend to direction away from insulator string; Can avoid insulator owing to the heat that produces of creeping of electric arc burns, thereby can avoid transmission line generation physical property fault, can improve the success rate of reclosing.Because the gap between two spheric electrodes of the utility model can be adjusted, therefore go for multiple voltage, multiple model, therefore the transmission line that the insulator string of varying number is supported has advantage applied widely; In the course of work of insulator string on shaft tower; The surface of insulator string can form filth gradually, deterioration takes place; Make the withstand voltage of insulator string be lower than the preceding withstand voltage of its installation, can adjust two gaps between the spheric electrode this moment just can be so that aging insulator string has lightning protection effect preferably.In addition, the design of the utility model rust-proof type spheric electrode can prevent effectively that spheric electrode from getting rusty and cause the ability of the seizure electric arc root of spheric electrode, the useful life that can effectively improve spheric electrode; The utility model is simple in structure, with low cost, and maintenance is also very simple, can be directly through the state of this adjustable clearance of visual inspection lightning protection device, and need not have a power failure inspection or charged inspection, safer, convenient.
Description of drawings
Fig. 1 is applied to the structural representation that built on stilts plain conductor is implemented for the utility model;
Fig. 2 is the spherical utmost point of the utility model wiring and gold utensil sketch map thereof;
Fig. 3 is the spherical utmost point of the utility model wiring and gold utensil sectional structure chart thereof;
Fig. 4 is adjustable support bracket fastened three-view diagram.
Embodiment
As shown in Figure 1; Lead is connected in through insulator string on the cross-arm of electric power line pole tower, and the adjustable clearance lightning protection device in first case study on implementation of the utility model is mainly by by fixedly gold utensil, wiring spheric electrode, ground connection spheric electrode and adjustable fixed support constitute.Be welded on the tooth arch after spheric electrode and the welding of fixed electrode connecting rod; Last tooth arch is fixed on the lead through screw or rivet with following tooth arch; And guaranteeing its balance, the wiring spheric electrode reliably is communicated with through between gold utensil and the lead at tooth arch bottom welding balance weight.The distance in gap between ground connection spheric electrode and the wiring spheric electrode mLength n than insulator string is short.With insulator string and lead contact point as basic point, in order to prevent to produce electric arc between wiring spheric electrode and the insulator string, lLength should be more than the 500mm, in the present embodiment, the distance between wiring spheric electrode and the insulator string lBe 500mm.
Adjustable fixed support is made up of copper facing band steel and screw; Band steel is divided into horizontal and vertical band steel; Laterally band steel is through welding vertical band steel in the above; Utilize screw that whole adjustable fixed support is fixed on the suspension insulator upper end, and laterally slot so that safe being fixed on the suspension insulator in the middle of the band steel.
The ground connection spheric electrode is made up of adjustable electrode connecting rod, spheric electrode, nut.The adjustable electrode connecting rod is a threaded rod; Length 300mm; Adjustable electrode connecting rod and spheric electrode, and be fixed in the horizontal band steel of the copper facing of holding the hole successfully both sides through nut, the distance in gap between engages adjustable ground connection spheric electrode through adjustable electrode connecting rod and nut and the wiring spheric electrode m, adjustable range is 50-250mm;
The wiring spheric electrode is made up of spheric electrode, fixed electrode connecting rod, last tooth arch, following tooth arch and balance weight.Be welded on the tooth arch fixed electrode length of connecting rod after spheric electrode and the welding of fixed electrode connecting rod kBe 50mm.Last tooth arch is fixed on the lead through screw or rivet with following tooth arch; Tooth arch all has metal to process up and down; Because the structure of this wire clamp gripping member; Make the wire clamp gripping member can keep not damaging the structural behaviour of metal conductor portion, and weld balance weight to guarantee its balance in the tooth arch bottom with the good conducting of lead.
In actual condition; May produce the electric arc of high temperature between ground connection spheric electrode and the wiring spheric electrode, molecule activity is very violent, therefore gets rusty easily; And in a single day spheric electrode gets rusty; Then can influence the effect of the generation electric arc of spheric electrode, so ground connection spheric electrode and wiring spheric electrode adopt antirust spheric electrode, for example adopt measures such as stable preferred metal, antirust coat, antirust composition.Therefore in the present embodiment; Ground connection spheric electrode and the zinc-plated steel ball of wiring spheric electrode, its radius of sphericity is about 25mm, and this size can be in the suction arc effect of the dispersiveness that guarantees spheric electrode, assurance spheric electrode; Make that the quality of spheric electrode is less, production cost is low, easy to carry.
As shown in Figure 1, lead is a plain conductor in the embodiment of the utility model, directly will go up tooth arch, down tooth arch is clamped and fastened on the metallic conductor of lead and gets final product.
Lightning impulse test is the result show; Insulator string in the utility model installs the adjustable clearance lightning protection device additional, and the clearance distance lightning flash over that is equal to or less than insulator string apart from the time, its 50% lightning impulse discharge voltage descends about 20% than the discharge voltage of insulator string; Discharge all occurs between the metal electrode of parallel connection gaps; In power frequency arc test, the adjustable clearance lightning protection device has good striking effect, can effectively prevent the damage of being struck by lightning of insulator string and lead.

Claims (7)

1. adjustable clearance lightning protection device that is used for power system transmission line; The lead of said transmission line hangs on the cross-arm of electric power line pole tower through insulator string; It is characterized in that: said adjustable clearance lightning protection device is by fixedly gold utensil (1), wiring spheric electrode (2), ground connection spheric electrode (3) and adjustable fixed support (4) constitute; Fixedly gold utensil (1) lead (5) that is clamped and fastened on transmission line is gone up and is welded with wiring spheric electrode (2); Wiring spheric electrode (2) is through fixedly lead (5) conducting of gold utensil (1) and transmission line, and ground connection spheric electrode (2) is fixed on suspension insulator (6) upper end through adjustable fixed support (4) and goes up conducting and keep ground connection with shaft tower cross-arm (7).
2. the adjustable clearance lightning protection device that is used for power system transmission line according to claim 1; It is characterized in that: said wiring spheric electrode (2) is made up of spheric electrode (21), fixed electrode connecting rod (22), last tooth arch (23), following tooth arch (24) and balance weight (25); Spheric electrode (21) is welded on the tooth arch (23) after welding with fixed electrode connecting rod (22); Last tooth arch (23) is fixed on the lead through screw or rivet with following tooth arch (24), and welds balance weight (25) to guarantee its balance in tooth arch (24) bottom.
3. the adjustable clearance lightning protection device that is used for power system transmission line according to claim 1; It is characterized in that: said ground connection spheric electrode (3) is made up of adjustable electrode connecting rod (31), spheric electrode (32), nut (33); Spheric electrode (32) and adjustable electrode connecting rod (31) welding; Adjustable electrode connecting rod (31) is fixed in adjustable fixed support (4) both sides through nut (33), and through its distance of nut (33) scalable.
4. the adjustable clearance lightning protection device that is used for power system transmission line according to claim 1; It is characterized in that: said adjustable fixed support (4) is made up of copper facing band steel and screw; Band steel is divided into horizontal band steel (41) and vertical band steel (42); Laterally band steel (41) is through welding vertical band steel (42) in the above; Utilize screw (43) that whole adjustable fixed support (4) is fixed on suspension insulator (6) upper end, and laterally slot so that safe being fixed on the suspension insulator (6) in the middle of the band steel (41).
5. the adjustable clearance lightning protection device that is used for power system transmission line according to claim 1 is characterized in that: said wiring spheric electrode (2) and ground connection spheric electrode (3) are antirust spheric electrode.
6. the adjustable clearance lightning protection device that is used for power system transmission line according to claim 1 is characterized in that: the radius of sphericity of said wiring spheric electrode (2) and ground connection spheric electrode (3) is 25mm.
7. the adjustable clearance lightning protection device that is used for power system transmission line according to claim 4 is characterized in that: between said wiring spheric electrode and the insulator string is more than the 500mm apart from l.
CN2011204670201U 2011-11-22 2011-11-22 Adjustable gap lightning protection device used for electric power system power transmission line Expired - Fee Related CN202395408U (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103138254A (en) * 2013-03-09 2013-06-05 李景禄 Adjustable excess voltage protective gap fine lightning protection method of power distribution network
CN104158119A (en) * 2014-08-22 2014-11-19 国家电网公司 Overhead ground wire suspended cable clamp adjusting method and buffer device thereof
CN105514917A (en) * 2015-12-05 2016-04-20 王丽鹏 Lightning protection device for high-voltage power transmission line tower
CN105845289A (en) * 2016-05-04 2016-08-10 国网天津市电力公司 Device for suppressing lightning trip-out rate by stretching discharge flashover path through lightning pulse
CN105896451A (en) * 2016-05-04 2016-08-24 国网天津市电力公司 Dual-electrode mutual-pull lightning-stroke trip limiter capable of reducing electric potential gradient
CN105939009A (en) * 2016-06-27 2016-09-14 武汉新能量科技发展有限公司 OPGW terminal voltage-limiting device for high voltage transformer substation
CN105957658A (en) * 2016-07-25 2016-09-21 国网湖南省电力公司 Ice-preventing insulator for ground wire ice-melting reconstruction
CN108011203A (en) * 2017-11-01 2018-05-08 王亚苹 A kind of retractable line part of high-voltage line separated time road

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103138254A (en) * 2013-03-09 2013-06-05 李景禄 Adjustable excess voltage protective gap fine lightning protection method of power distribution network
CN104158119A (en) * 2014-08-22 2014-11-19 国家电网公司 Overhead ground wire suspended cable clamp adjusting method and buffer device thereof
CN104158119B (en) * 2014-08-22 2016-07-20 国家电网公司 A kind of overhead ground wire suspension clamp regulation method and buffer unit
CN105514917A (en) * 2015-12-05 2016-04-20 王丽鹏 Lightning protection device for high-voltage power transmission line tower
CN105845289A (en) * 2016-05-04 2016-08-10 国网天津市电力公司 Device for suppressing lightning trip-out rate by stretching discharge flashover path through lightning pulse
CN105896451A (en) * 2016-05-04 2016-08-24 国网天津市电力公司 Dual-electrode mutual-pull lightning-stroke trip limiter capable of reducing electric potential gradient
CN105896451B (en) * 2016-05-04 2018-03-06 国网天津市电力公司 The mutual pull-type lightning stroke trip limiter for reducing electric potential gradient of bipolar electrode
CN105939009A (en) * 2016-06-27 2016-09-14 武汉新能量科技发展有限公司 OPGW terminal voltage-limiting device for high voltage transformer substation
CN105957658A (en) * 2016-07-25 2016-09-21 国网湖南省电力公司 Ice-preventing insulator for ground wire ice-melting reconstruction
CN108011203A (en) * 2017-11-01 2018-05-08 王亚苹 A kind of retractable line part of high-voltage line separated time road

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
EE01 Entry into force of recordation of patent licensing contract

Assignee: CHANGSHA XINCHANG ELECTRIC POWER SCIENCE & TECHNOLOGY CO., LTD.

Assignor: Yi Xiaofei|Li Jinglu|Liao Zhihua

Contract record no.: 2015430000012

Denomination of utility model: Adjustable gap lightning protection device used for electric power system power transmission line

Granted publication date: 20120822

License type: Exclusive License

Record date: 20150326

LICC Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20120822

Termination date: 20181122

CF01 Termination of patent right due to non-payment of annual fee