CN201075637Y - Puncture type lightning protection equipment for preventing aerial insulated wire lightning stroke yarn cutting - Google Patents
Puncture type lightning protection equipment for preventing aerial insulated wire lightning stroke yarn cutting Download PDFInfo
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- CN201075637Y CN201075637Y CNU2007201131867U CN200720113186U CN201075637Y CN 201075637 Y CN201075637 Y CN 201075637Y CN U2007201131867 U CNU2007201131867 U CN U2007201131867U CN 200720113186 U CN200720113186 U CN 200720113186U CN 201075637 Y CN201075637 Y CN 201075637Y
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- bucking electrode
- guide wire
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Abstract
The utility model discloses a puncture-type lightning protection device for preventing an aerial insulating wire from breakage by lightning stroke, comprising an insulator, the aerial insulating wire, a puncturing cable clamp, a puncturing extension conductor and an arc shielding electrode. Under thunder overvoltage, the thunder overvoltage is led to the arc shielding electrode positioned at the offside of the insulator lower part metal electrode by a puncturing blade which touches the conductor tightly, thus leading the thunder overvoltage to be added between the arc shielding electrode and the insulator lower part metal electrode, and causing the air gap between the arc shielding electrode and the insulator lower part metal electrode to be broken through. In this way, the power frequency afterflow arc is fired in the air gap after thunder strike, thus protecting the aerial insulating wire not to be broken during the process of lightning stroke. The utility model is safe in operation, free in maintenance and high in reliability during the process of lightning protection gap operation, which is particularly applicable to the 10kV aerial insulating wire.
Description
Technical field
The utility model relates to the penetration type lightning protection device that prevents the suspended insulated guide wire lightning-caused breaking, belongs to power distribution network technology field.
Background technology
In order to reduce the overhead distribution fault that external causes such as trees, birds, accumulated snow cause, improve power supply reliability, adopted suspended insulated guide wire in recent decades both at home and abroad in a large number.Insulated conductor has solved corridor that plain conductor can't resolve and safety problem really, compare with cable, it has reduced investment, builds fast advantage, but its lightning-caused breaking problem is very outstanding, and it has become in the distribution network system major issue that an extremely presses for solution.
Developed country adopts the time of suspended insulated guide wire power transmission and distribution longer, has accumulated a large amount of operating experiences, has successively adopted many precautionary measures and method, and is specific as follows.
Overhead ground wire: in the open space, joint use overhead ground wire to tackle distribution insulated overhead line induction overvoltage, this is the bigger conventional method of a kind of investment.But, because the insulation level of distribution line design is lower, be very easy to cause the counterattack flashover behind the thunderbolt overhead ground wire, still can cause power frequency continued flow fusing insulated conductor.So external present less employing of this method.
Zinc oxide arrester: in recent years, people utilize the zinc oxide arrester nonlinear resistance property and block the characteristic of power frequency continued flow fast, are widely used in circuit with the restriction lightning overvoltage, and its protection range is limited, is merely able to protect this bar apparatus basically.Countries such as Japan, the U.S., Canada drop into huge fund circuit are transformed, and after on every basic electric pole three (phase) zinc oxide arresters being installed, the lightning-caused breaking rate is reduced to 2.7% by original 93.3%, and the lightning-caused breaking accident does not take place substantially again.But adopt this kind method, can use lightning arrester in a large number, when lightning arrester is second-rate, might be in operation and causes more line accident, influence safe operation.
The clamper insulator: Tokyo Electric Power adopts discharge clamper insulator to prevent the insulated conductor lightning-caused breaking.Promptly peel off insulating barrier, install the metal wire clamp of particular design additional, and the striking discharging gap is set in insulated conductor bearing.When lightning flash over causes power frequency continued flow, power frequency continued flow on this metal wire clamp arcing until line tripping extinguishing power frequency continued flow, thereby avoid burning insulator and fusing insulated conductor.
According to principle of uniformity, the covered wire distribution system (SAX system) of Finland Nokia company research and development adopts suspension clamp and other device as the arc protection device, and suspension clamp bears power frequency arc.But this device anti-seismic performance is relatively poor, when the circuit wind is waved, often breaks down.
Increase flashover path: by increasing flashover path, reducing the power frequency probability of sustained arc, is another thinking that prevents insulated overhead line lightning-caused breaking accident.Russia State Power Corporation at first proposes long flashover gap protection mode.One U-shaped insulation flashover path is installed on cross-arm, makes the impulse sparkover voltage between U-shaped head and the insulated conductor lower than insulator arc-over voltage.When lightning overvoltage, this gap is prior to the insulator breakdown flashover, and develops along the insulation flashover path.Design this path long enough, just can stop power frequency continued flow to build arc, cut off power frequency continued flow.But this method is also immature, does not apply.
Improve the line insulation level: the porcelain insulator in the distribution line is changed becomes the silicon rubber insulation cross-arm, improves the line insulation level completely, and the power frequency continued flow that thunder and lightning causes can't be built arc greatly because of creep distance.
In order to lower the circuit cost, can adopt suspended insulated guide wire to strengthen the mode of minor insulation, promptly add heavy insulation in insulated conductor bearing, also be a kind of way of trial, effect neither be very desirable.
The line overvoltage protection device: some many damage to crops caused by thunder countries as Japan, Australia, US and European etc., in fact large-scale popularization application circuit overvoltage protection device on insulated overhead line is exactly to be with the external series gap lightning arrester in recent years.This device utilizes external series gap, formation is to the outer discharging gap of zinc oxide current limiting element, when lightning overvoltage appears in circuit, external series gap at first discharges, lightning current discharges through the zinc oxide current limiting element, the then oxidized zinc current limiting element of power frequency continued flow blocks, thereby prevents the generation of insulated overhead line lightning-caused breaking accident.This protective device is safeguarded, maintenance workload is bigger after putting into operation.
In sum, though above-mentioned several mode can prevent lightning-caused breaking effectively, but also there are following problems: the anti-broken string of present some gold utensil, some before use, insulated conductor need be peeled off long length, exposed part is bigger, and this can have certain influence to the sealing and the insulation of lead, and can have a strong impact on the mechanical strength and the useful life of lead; Some installs more complicated, is not easy to use in practice.And use lightning arrester and overvoltage protection device, though protection effect is good, mainly there are problems such as operation maintenance difficulty.
Summary of the invention
The purpose of this utility model is for overcoming the defective of prior art, a kind of penetration type lightning protection device that prevents the suspended insulated guide wire lightning-caused breaking being provided.
The penetration type lightning protection device that prevents the suspended insulated guide wire lightning-caused breaking of the present utility model, comprise insulator, suspended insulated guide wire, it is characterized in that being equipped with on the suspended insulated guide wire penetrating cable clamp, penetrating cable clamp is connected with puncture and extends conductor, puncture is extended end conductor and is provided with the arc bucking electrode, on puncture extension conductor and arc bucking electrode, be with insulating sleeve, wherein, be enclosed within the insulating sleeve termination openings on the arc bucking electrode, the cambered surface of arc bucking electrode is towards insulator lower metal electrode, and arc bucking electrode and insulator lower metal electrode constitute a pair of discharging gap.
The penetrating cable clamp of penetration type lightning protection device of the present utility model directly penetrates the insulating barrier of suspended insulated guide wire, closely electrically contacts with the insulated conductor conductor inside, thereby the current potential of insulated conductor is directly caused on puncture extension conductor and the arc bucking electrode.Under the effect of lightning overvoltage, the puncture blade that closely contacts with conductor, extending conductor by puncture causes lightning overvoltage on the arc bucking electrode, make lightning overvoltage directly be added in this arc bucking electrode and insulator lower metal electric discharge between electrodes gap, cause the air gap between arc bucking electrode and the insulator lower metal electrode to puncture.Like this, behind lightning impulse, power frequency continued flow electric arc will burn in this air gap, thereby protect suspended insulated guide wire can not break in lightning stroke process.
Further feature of the present utility model, the end of arc bucking electrode is the dimpling flat horizontal surface, and the side is curved.Like this, the arc bucking electrode can play the effect that makes the electrode surface electric field homogenizing.Insulator lower metal electrode is the face of cylinder that diameter is bigger, the electric field on its surface is also relatively even, can make arc bucking electrode and insulator lower metal electrode be in face-to-face state in the horizontal direction, thereby constitute a pair of more uniform electric field gap, it can make discharge voltage more reliable and stable.
Usually, the distance in the atmospherical discharges gap between arc bucking electrode and the insulator lower metal electrode between 10～20cm, thereby can guarantee that the gap can puncture prior to insulator, plays a protective role under the effect of lightning overvoltage.
This lightning protection device adopts the penetrating cable clamp of the standard suspended insulated guide wire that punctures.Install insulating case additional at puncture extension conductor and arc bucking electrode outside, can guarantee insulation.
The advantage of lightning protection device of the present utility model is:
(1) simple installation needn't be peelled off the insulating barrier of insulated conductor;
(2) non-maintaining, the anti-performance of burning is outstanding;
(3) lightning protection device installation and load flow are to irrelevant;
(4) the protection insulator surface exempts from electric arc and burns damage;
(5) exempt from ground connection, security of operation, the reliability height is particluarly suitable for using on the 10kV suspended insulated guide wire, is applicable to copper, aluminium suspended insulated guide wire.
Description of drawings
Fig. 1 is a kind of concrete structure schematic diagram of the utility model lightning protection device;
Fig. 2 is the cambered surface schematic diagram of arc bucking electrode.
Embodiment
With reference to Fig. 1, prevent the penetration type lightning protection device of suspended insulated guide wire lightning-caused breaking, comprise insulator 5, suspended insulated guide wire 6, penetrating cable clamp 1 is installed on suspended insulated guide wire, penetrating cable clamp 1 is connected with puncture and extends conductor 2, puncture is extended conductor 2 ends and is provided with arc bucking electrode 3, on puncture extension conductor 2 and arc bucking electrode 3, be with insulating sleeve 7, wherein, be enclosed within the insulating sleeve termination openings on the arc bucking electrode 3, the cambered surface of arc bucking electrode 3 is towards insulator lower metal electrode 4, and arc bucking electrode 3 and insulator lower metal electrode 4 constitute a pair of discharging gap.
The arc bucking electrode that Fig. 2 provides, its end is the dimpling flat horizontal surface, and the side has been the evenly arc of shielding of electric field, can make electric field gap homogenizing.
Claims (3)
1. prevent the penetration type lightning protection device of suspended insulated guide wire lightning-caused breaking, comprise insulator (5), suspended insulated guide wire (6), it is characterized in that being equipped with on the suspended insulated guide wire penetrating cable clamp (1), penetrating cable clamp (1) is connected with puncture and extends conductor (2), puncture is extended conductor (2) end and is provided with arc bucking electrode (3), on puncture extension conductor (2) and arc bucking electrode (3), be with insulating sleeve (7), wherein, be enclosed within the insulating sleeve termination openings on the arc bucking electrode (3), the cambered surface of arc bucking electrode (3) is towards insulator lower metal electrode (4), and arc bucking electrode (3) and insulator lower metal electrode (4) constitute a pair of discharging gap.
2. the penetration type lightning protection device that prevents the suspended insulated guide wire lightning-caused breaking according to claim 1, the spacing that it is characterized in that the discharging gap between arc bucking electrode (3) and the insulator lower metal electrode (4) is at 10～20cm.
3. the penetration type lightning protection device that prevents the suspended insulated guide wire lightning-caused breaking according to claim 1 is characterized in that the end of arc bucking electrode (3) is the dimpling flat horizontal surface, and the side has been the evenly arc of shielding of electric field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201131867U CN201075637Y (en) | 2007-08-16 | 2007-08-16 | Puncture type lightning protection equipment for preventing aerial insulated wire lightning stroke yarn cutting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201131867U CN201075637Y (en) | 2007-08-16 | 2007-08-16 | Puncture type lightning protection equipment for preventing aerial insulated wire lightning stroke yarn cutting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201075637Y true CN201075637Y (en) | 2008-06-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201131867U Expired - Fee Related CN201075637Y (en) | 2007-08-16 | 2007-08-16 | Puncture type lightning protection equipment for preventing aerial insulated wire lightning stroke yarn cutting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201075637Y (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104345206A (en) * | 2014-11-14 | 2015-02-11 | 国家电网公司 | Voltage live-line measurement device capable of preventing fault arcs |
| CN104360134A (en) * | 2014-11-14 | 2015-02-18 | 国家电网公司 | Live-line voltage measurement device capable of preventing transient overvoltage |
| CN104360161A (en) * | 2014-11-14 | 2015-02-18 | 国家电网公司 | Contact resistance live line measurement device |
| CN104360133A (en) * | 2014-11-14 | 2015-02-18 | 国家电网公司 | Contact resistance voltage measuring device |
| CN104360135A (en) * | 2014-11-14 | 2015-02-18 | 国家电网公司 | Live line voltage measurement device |
| CN104360163A (en) * | 2014-11-14 | 2015-02-18 | 国家电网公司 | Contact resistor live-line measurement device capable of preventing fault arcs |
| CN104360132A (en) * | 2014-11-14 | 2015-02-18 | 国家电网公司 | Contact resistance live line measurement device |
| CN104360160A (en) * | 2014-11-14 | 2015-02-18 | 国家电网公司 | High-voltage loop contact resistor live line measurement device |
| CN104360162A (en) * | 2014-11-14 | 2015-02-18 | 国家电网公司 | Live line measurement device for contact resistance of high voltage loop |
| CN114336179A (en) * | 2021-12-31 | 2022-04-12 | 国网河南省电力公司周口供电公司 | Novel lightning-stroke-prevention broken line protection device for shielding, insulating and isolating 10kV overhead insulated line |
-
2007
- 2007-08-16 CN CNU2007201131867U patent/CN201075637Y/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104345206A (en) * | 2014-11-14 | 2015-02-11 | 国家电网公司 | Voltage live-line measurement device capable of preventing fault arcs |
| CN104360134A (en) * | 2014-11-14 | 2015-02-18 | 国家电网公司 | Live-line voltage measurement device capable of preventing transient overvoltage |
| CN104360161A (en) * | 2014-11-14 | 2015-02-18 | 国家电网公司 | Contact resistance live line measurement device |
| CN104360133A (en) * | 2014-11-14 | 2015-02-18 | 国家电网公司 | Contact resistance voltage measuring device |
| CN104360135A (en) * | 2014-11-14 | 2015-02-18 | 国家电网公司 | Live line voltage measurement device |
| CN104360163A (en) * | 2014-11-14 | 2015-02-18 | 国家电网公司 | Contact resistor live-line measurement device capable of preventing fault arcs |
| CN104360132A (en) * | 2014-11-14 | 2015-02-18 | 国家电网公司 | Contact resistance live line measurement device |
| CN104360160A (en) * | 2014-11-14 | 2015-02-18 | 国家电网公司 | High-voltage loop contact resistor live line measurement device |
| CN104360162A (en) * | 2014-11-14 | 2015-02-18 | 国家电网公司 | Live line measurement device for contact resistance of high voltage loop |
| CN114336179A (en) * | 2021-12-31 | 2022-04-12 | 国网河南省电力公司周口供电公司 | Novel lightning-stroke-prevention broken line protection device for shielding, insulating and isolating 10kV overhead insulated line |
| CN114336179B (en) * | 2021-12-31 | 2023-11-21 | 国网河南省电力公司周口供电公司 | Lightning-proof broken line protection device for shielding, insulating and isolating 10kV overhead insulated line |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080618 Termination date: 20090916 |