CN203366872U - An apparatus using a lightning protection gap insulation cooperation method based on Coulomb force arc ignition - Google Patents
An apparatus using a lightning protection gap insulation cooperation method based on Coulomb force arc ignition Download PDFInfo
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- CN203366872U CN203366872U CN 201320392874 CN201320392874U CN203366872U CN 203366872 U CN203366872 U CN 203366872U CN 201320392874 CN201320392874 CN 201320392874 CN 201320392874 U CN201320392874 U CN 201320392874U CN 203366872 U CN203366872 U CN 203366872U
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Abstract
The utility model discloses an apparatus using a lightning protection gap insulation cooperation method based on Coulomb force arc ignition. The apparatus comprises an insulating arc-extinguishing device and a protective gap device arranged in parallel near an insulator string. The insulating arc-extinguishing device comprises an arc-extinguishing cylinder and a gas generator disposed in the arc-extinguishing cylinder. The protective gap device is mainly formed by a low-voltage end electrode and a high-voltage end electrode. One end of the low-voltage end electrode is installed on a cross arm of a tower through a connecting tool, while the insulating arc-extinguishing device is installed on the other end of the low-voltage end electrode. One end of the high-voltage end electrode is installed an overhead wire, while the other end of the high-voltage end electrode points to the low-voltage end electrode. The length of the distance of a main protective gap between the low-voltage end electrode and the high-voltage end electrode is set as the length of the creep distance of the insulator string of a same tower. The apparatus has characteristics of simple structure, low production cost, and security and reliability, resolves a problem that a conventional protective gap is still connected with a part of the creep distance of the insulator string in a short circuit manner, and effectively reduces the lightning trip-out rate and the accident rate of a power transmission line in a power system, and increases the stability of the power system.
Description
Technical field
The utility model has related to transmission line protective gap device, has been specifically related to a kind of device of the lightning protection inter space insulation coordination method based on the Coulomb force striking.
Background technology
The transmission line lightning protection always is the important content of power department Thunder Protection, and lightning fault remains one of key factor affected power grid security.The transmission line lightning strikes, cause the line insulator flashover, and the power frequency continued flow thereupon risen damages insulator string and gold utensil, causes insulator string to burn and blows the wire accident.Traditional " blocking type " lightning protection mode, the transformation pole tower ground resistance, set up coupling ground wire and lightning conducter, installation leakage conductor etc., due to its limitation, can only solve 50% lightning strike accident.In recent years, in order further to improve the reliability of transmission line power supply, the power department employing is installed protection in parallel gap additional at transmission line and is prevented lightning strike accident.Yet, in actual motion, it is as follows that protection in parallel gap has obvious defect:
At first, protection in parallel gap is arranged on the insulator string two ends, is that the method by shortening the insulator string creepage distance plays the effect that while being struck by lightning, preferential insulator string punctures.The insulator string creepage distance is by short circuit; not only causing the whole lightning withstand level of power system transmission line to descend increases tripping rate with lightning strike; power frequency insulation level while simultaneously causing electric power system normally to move descends, and has improved protection in parallel gap mistakenly hit under temporary overvoltage and switching overvoltage between invisible to wear probability.
Secondly, when the transmission line lightning strikes, protection in parallel gap, preferentially because the overvoltage that thunderbolt causes punctures, leaks into the earth by lightning current, thereby plays the effect of protection transmission line and electric equipment.Yet because parallel connection protection gap does not have the arc extinguishing ability; can not extinguish the power frequency continued flow caused after the insulator string flashover; electric arc is long-time calcination between the protection gap; to cause insulator string to damage; when serious; may cause the transmission line broken string, electric arc can cause ablation and reduce its protective value electrode simultaneously.The final circuit breaker that relies on comes extinguish arcs to realize protecting transmission line and equipment, is to sacrifice the way that " trip-out rate " and " power supply reliability " exchanges " low rate of failure " for.
The defect that does not possess the arc extinguishing ability for common parallel connection gaps, the inventor is in the patent of applying for before, China Patent No. is 2011201046273 to disclose a kind of 10～35kV overhead transmission line constraint space gas jet arc extinguishing lightning protection clearance apparatus that is applicable to 10～35kV overhead transmission line, this device is installed in parallel in the line insulator string two ends, flashover voltage between the protection gap is less than protected insulator string, thereby having precedence over protected insulator string when transmission line is struck by lightning punctures, during disruptive discharge, the automatic induction lightening stream signal of signal pickup assembly also triggers the high velocity jet gas generating unit, moment produces the high velocity jet air-flow to the intense impact longitudinally of afterflow electric arc in constraint space, be cooled to and extinguish.And for example China Patent No. is 2011200053246 to disclose the constraint space jet-stream wind arc extinguishing lightning protection clearance apparatus for each electric pressure transmission line, this device is installed in parallel in the line insulator string two ends, flashover voltage between the protection gap is less than protected insulator string, thereby having precedence over protected insulator string when transmission line is struck by lightning punctures, during disruptive discharge, when the gas exhausted material of constraint space inside is sharply heated the generation gases at high pressure by high-temperature electric arc, the automatic collection signal of signal pickup assembly also starts the gas jet generating means, moment produces high velocity air and longitudinally electric arc is impacted, be cooled to and extinguish.Before the inventor, the patent of application plays a good role for extinguishing power frequency arc, but still has short circuit SI semi-insulation substring creepage distance, reduces the shortcoming of circuit power frequency insulation level.Above-mentioned device also needs to be further improved, thereby reaches better effect, improves the stability of electric power system.
Summary of the invention
The purpose of this utility model is for the deficiencies in the prior art, a kind of overhead transmission line that is applicable to various electric pressures is provided, can have successfully extinguished the device that power frequency continued flow electric arc that lightning discharge causes does not reduce again the lightning protection inter space insulation coordination method attracted based on Coulomb force of electric power system power frequency insulation level.
To achieve these goals, the utility model has adopted following technical scheme:
A kind of device of the lightning protection inter space insulation coordination method based on the Coulomb force striking, comprise the insulation arc-control device and be arranged on side by side near the protection inter space device of insulator string; The insulation arc-control device comprises the arc extinguishing cylinder and is built in the gas generator of arc extinguishing cylinder; The protection inter space device mainly consists of low-pressure end electrode and high-pressure side electrode; Wherein, an end of described low-pressure end electrode is by connecting installation on cross arm of tower, other end installing insulating arc-control device; One end of described high-pressure side electrode is arranged on aerial condutor, and the other end points to the low-pressure end electrode; The creepage distance length of the insulator string that the distance A length setting in the main protection gap between described low-pressure end electrode and high-pressure side electrode is same shaft tower.
The utility model is arranged on the low-pressure end electrode on cross arm of tower, the high-pressure side electrode is arranged on aerial condutor, and the distance of the main protection between low-pressure end electrode and high-pressure side electrode is become and equaled the insulator string creepage distance by common parallel connection gaps short circuit SI semi-insulation substring creepage distance, inhaling mutually principle by charge inducing principle and the charges of different polarity makes the preferential insulator string of this device energy breakdown, be that insulator string is not subject to effects of lightning, can not damage because of thunderbolt; And the voltage endurance capability that has guaranteed power frequency is unaffected, has reduced the nothing under the switching overvoltage and punctured.
In common protection inter space device in parallel; low-field electrode and high-field electrode are arranged on respectively the insulator string top and bottom; it also has shortcoming: insulator string is unique solid tie point of wire and shaft tower, is bearing the Action of Gravity Field of wire itself, and the safety of electrical network is played an important role.On common parallel connection gaps electrode installation and insulator string, increased undoubtedly the stressed of insulator string, can be multiplied in the situation that wind-force makes wire rock this power of swing; The utility model is installed on the high and low pressure termination electrode respectively on wire and shaft tower, on the stressed not directly impact of insulator string.
Common parallel connection gaps attracts lightning current, the protection insulator string, but with thunder and lightning puncture and the power frequency continued flow that rises can locate and elbow link plate place through the wire clamp (be exactly that instrument that wire is connected with insulator string) of insulator string.The heat of power frequency continued flow can cause wire clamp and conductor overheating, has increased the probability of lightning-caused breaking; In the utility model; thunder and lightning punctures from wire toward shaft tower, even there is power frequency arc also can not cause and burn phenomenon insulator string, and main protection clearance distance insulator string be far away; the possibility that power frequency arc burns insulator string reduces, better to the protection effect of insulator string.
Of the present utility model further illustrating, the end of above-described low-pressure end electrode is connecting a connecting cylinder that adopts non-conducting material to make.
Of the present utility model further illustrating, above-described connecting cylinder can be straight-tube shape or horn-like.
Of the present utility model further illustrating, the above straight-tube shape connecting cylinder is provided with the striking disk that adopts electric conducting material (as copper, aluminium etc.) to make.
Of the present utility model further illustrating, the above horn-like connecting cylinder is provided with the striking copper band.
Improvement technical scheme of the present utility model, set up striking disk or striking copper band, and reliably fixing by connecting cylinder and low-pressure end electrode; Yet connecting cylinder is electrically non-conductive material to be made; therefore; thunder and lightning punctures connecting cylinder while attracteding to striking disk or striking copper band again and then arrives the low-pressure end electrode, and this just is equivalent to the striking disk or the striking copper band has been divided into small one and large one two gaps by the main protection gap.Striking disk or striking copper band play sucking action (insulator string is within its protection range) to the thunder and lightning of certain air scope on every side, have increased the striking ability, thereby the main protection clearance distance of device is increased to, are equal to or greater than the insulator string creepage distance.Suppose that the negative polarity thunderbolt is in aerial condutor, lightning wave is sent to close shaft tower insulator string and lightning protection inter space by wire.The high-pressure side electrode punctures front meeting and assembles a large amount of negative electrical charges, by principle of induction is known, on the striking disk, will induce different in nature positive charge, between inducing charge and charge inducing, can produce powerful Coulomb attraction power effect, attracts thunder and lightning to puncture towards the low-pressure end electrode.The positive polarity thunderstorm hour is proving by the same methods.
What the insulation arc-control device in the utility model adopted is the arc-control device of inventor in applying for a patent (cn201210371579.3), this insulation arc-control device comprises lightening pulse harvester, arc extinguishing cylinder and gas generator, and gas generator is placed in the arc extinguishing cylinder; The lightening pulse harvester is connected with the low-pressure end electrode, realizes gathering the thunder and lightning signal; Gas generator comprises the gentle ball insulator foot of arc extinguishing gas ball; Be provided with trigger electrode and short-circuited conducting sleeve on arc extinguishing gas ball; Gas ball insulator foot is provided with fixed electrode on the position corresponding with trigger electrode, and fixed electrode is connected with the electrode of lightening pulse harvester.Arc extinguishing gas ball comprises electricity-heat converter and solid gas exhausted material device; The electroporation that electricity-heat converter passes over the lightening pulse harvester is heat energy; Solid gas exhausted material device produces a large amount of gas under high-temperature and high-pressure conditions.The stack vertically in the arc extinguishing cylinder of the gas generator of insulation arc-control device is arranged and embedded iron plate all is equipped with in each gas generator inside; The arc extinguishing cylinder of insulation arc-control device is provided with kicker magnet and switching sheet metal; When transmission line occurs once to be struck by lightning, the first gas generator starts and carries out arc extinguishing, then automatic trip is from arc-control device, the position of the first gas generator before the second gas generator falls to, the position of the second gas generator before the 3rd gas generator falls to, the embedded iron plate of the second gas generator and kicker magnet adhesive, the trigger electrode of the second gas generator forms reliable the connection with the electrode of lightening pulse harvester, completes the arc extinguishing that once is struck by lightning.The arc extinguishing cylinder is provided with the draw-in groove of offsetting the kick produced when gas generator starts.
The utility model will be by thinking that two ends, protection gap arranged side by side are arranged on respectively on shaft tower and aerial condutor with insulator string; make thunder and lightning can be chosen between the electrode in protection gap or discharge thunder energy on insulator string, protect disruptive field intensity between clearance electrode and insulator string the final decision of flashover field intensity size the lightning impulse discharge path.When the disruptive field intensity between the protection clearance electrode is greater than the flashover field intensity of insulator string, thunder and lightning is from the disruptive discharge of protection clearance electrode, and the effect of dredging lightning current protection insulator string is played in the protection gap.Architecture advances of the present utility model is that the inventor finds out according to this point.
While using the device of the lightning protection inter space insulation coordination method based on the Coulomb force striking of the present utility model, lightening pulse can be assembled a large amount of same sex electric charges at electrode one end before puncturing protective gap, and induces a large amount of charges of different polarity simultaneously on other end electrode; According to the electric charge principle of opposite sex attraction, there is the Coulomb force of attracting each other between the charges of different polarity on the lightning protection inter space two end electrodes, final definite play a decisive role of this Coulomb force to the thunder discharge path.The lightning protection inter space device of producing based on this principle, when realizing transmission line lightning stroke in the preferential selection in thunder discharge path, the creationary dielectric strength that makes lightning protection inter space power frequency dielectric strength be more than or equal to insulator string, realized newly coordinating without the insulation of power-frequency voltage loss.
Advantage of the present utility model:
1. by the low-pressure end electrode, be arranged on cross arm of tower, the high-pressure side electrode is arranged on aerial condutor; and the protection gap formed between low-pressure end electrode and high-pressure side electrode is listed near insulator string; allow this protection gap have precedence over insulator string breakdown; make insulator string not be subject to effects of lightning fully; reduce power system transmission line tripping rate with lightning strike and rate of failure, raising stability of power system, extend the power equipment such as transformer, circuit breaker useful life, greatly saved maintenance, the maintenance cost of equipment cost and system.
2. simple in structure, cost of manufacture is low, safe and reliable.
The accompanying drawing explanation
Fig. 1 is the structural representation of the utility model one embodiment.
Fig. 2 is the structural representation of another embodiment of the utility model.
Reference numeral:
The 1-insulator string, the 2-cross arm of tower, 3-connects gold utensil, 4-arc extinguishing cylinder, 5-gas generator, 6-low-pressure end electrode, 7-striking disk, 8-high-pressure side electrode, 9-aerial condutor, 10-connecting cylinder, 11-striking copper band, the distance in A-main protection gap.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further illustrated.
Embodiment 1:
A kind of device of the lightning protection inter space insulation coordination method based on the Coulomb force striking, comprise the insulation arc-control device and be arranged on side by side near the protection inter space device of insulator string 1; The insulation arc-control device comprises arc extinguishing cylinder 4 and is built in the gas generator 5 of arc extinguishing cylinder 4; The protection inter space device mainly consists of low-pressure end electrode 6 and high-pressure side electrode 8; Wherein, an end of described low-pressure end electrode 6 is arranged on cross arm of tower 2 by connecting gold utensil 3, other end installing insulating arc-control device; One end of described high-pressure side electrode 8 is arranged on aerial condutor 9, and the other end points to low-pressure end electrode 6; The creepage distance length of the insulator string 1 that the distance A length setting in the main protection gap between described low-pressure end electrode 6 and high-pressure side electrode 7 is same shaft tower.
Embodiment 2:
As shown in Figure 1, a kind of device of the lightning protection inter space insulation coordination method based on the Coulomb force striking, comprise the insulation arc-control device and be arranged on side by side near the protection inter space device of insulator string 1; The insulation arc-control device comprises arc extinguishing cylinder 4 and is built in the gas generator 5 of arc extinguishing cylinder 4; The protection inter space device mainly consists of low-pressure end electrode 6 and high-pressure side electrode 8; Wherein, an end of described low-pressure end electrode 6 is arranged on cross arm of tower 2 by connecting gold utensil 3, other end installing insulating arc-control device; One end of described high-pressure side electrode 8 is arranged on aerial condutor 9, and the other end points to low-pressure end electrode 6; The creepage distance length of the insulator string 1 that the distance A length setting in the main protection gap between described low-pressure end electrode 6 and high-pressure side electrode 7 is same shaft tower.The end of described low-pressure end electrode 6 is connecting a connecting cylinder 10 that adopts the straight-tube shape of non-conducting material making, and the straight-tube shape connecting cylinder is provided with the striking disk 7 that adopts electric conducting material to make.
Embodiment 3:
As shown in Figure 2, a kind of device of the lightning protection inter space insulation coordination method based on the Coulomb force striking, comprise the insulation arc-control device and be arranged on side by side near the protection inter space device of insulator string 1; The insulation arc-control device comprises arc extinguishing cylinder 4 and is built in the gas generator 5 of arc extinguishing cylinder 4; The protection inter space device mainly consists of low-pressure end electrode 6 and high-pressure side electrode 8; Wherein, an end of described low-pressure end electrode 6 is arranged on cross arm of tower 2 by connecting gold utensil 3, other end installing insulating arc-control device; One end of described high-pressure side electrode 8 is arranged on aerial condutor 9, and the other end points to low-pressure end electrode 6; The creepage distance length of the insulator string 1 that the distance A length setting in the main protection gap between described low-pressure end electrode 6 and high-pressure side electrode 7 is same shaft tower.The end of described low-pressure end electrode 6 is connecting a trumpet-shaped connecting cylinder 10 that adopts non-conducting material to make, and horn-like connecting cylinder is provided with striking copper band 11.
Claims (5)
1. the device of the lightning protection inter space insulation coordination method based on the Coulomb force striking, comprise the insulation arc-control device and be arranged on side by side near the protection inter space device of insulator string (1); The insulation arc-control device comprises arc extinguishing cylinder (4) and is built in the gas generator (5) of arc extinguishing cylinder (4); The protection inter space device mainly consists of low-pressure end electrode (6) and high-pressure side electrode (8); It is characterized in that: an end of described low-pressure end electrode (6) is arranged on cross arm of tower (2) above, other end installing insulating arc-control device by connecting gold utensil (3); It is upper that one end of described high-pressure side electrode (8) is arranged on aerial condutor (9), and the other end points to low-pressure end electrode (6); The creepage distance length of the insulator string (1) that the distance A length setting in the main protection gap between described low-pressure end electrode (6) and high-pressure side electrode (7) is same shaft tower.
2. the device of the lightning protection inter space insulation coordination method based on the Coulomb force striking according to claim 1 is characterized in that: the end of described low-pressure end electrode (6) is connecting a connecting cylinder (10) that adopts non-conducting material to make.
3. the device of the lightning protection inter space insulation coordination method based on the Coulomb force striking according to claim 2, it is characterized in that: described connecting cylinder (10) is straight-tube shape or horn-like.
4. the device of the lightning protection inter space insulation coordination method based on the Coulomb force striking according to claim 3 is characterized in that: described straight-tube shape connecting cylinder is provided with the striking disk (7) that adopts electric conducting material to make.
5. the device of the lightning protection inter space insulation coordination method based on the Coulomb force striking according to claim 3, it is characterized in that: described horn-like connecting cylinder is provided with striking copper band (11).
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320392874 CN203366872U (en) | 2013-07-03 | 2013-07-03 | An apparatus using a lightning protection gap insulation cooperation method based on Coulomb force arc ignition |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320392874 CN203366872U (en) | 2013-07-03 | 2013-07-03 | An apparatus using a lightning protection gap insulation cooperation method based on Coulomb force arc ignition |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103337315A (en) * | 2013-07-03 | 2013-10-02 | 王巨丰 | Device adopting anti-thunder clearance insulation coordination method based on coulomb force striking arc |
| CN104299733A (en) * | 2014-10-13 | 2015-01-21 | 王巨丰 | Arc control device provided with high-stability anti-falling mechanism |
-
2013
- 2013-07-03 CN CN 201320392874 patent/CN203366872U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103337315A (en) * | 2013-07-03 | 2013-10-02 | 王巨丰 | Device adopting anti-thunder clearance insulation coordination method based on coulomb force striking arc |
| CN103337315B (en) * | 2013-07-03 | 2016-05-04 | 王巨丰 | The device of the lightning protection inter space Insulation Coordination method based on Coulomb force striking |
| CN104299733A (en) * | 2014-10-13 | 2015-01-21 | 王巨丰 | Arc control device provided with high-stability anti-falling mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131225 Effective date of abandoning: 20160504 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |