CN102486956B - Lightning protection device with combination of multigap driven arc extinguishing and driving arc extinguishing by multipoint strong airflow - Google Patents
Lightning protection device with combination of multigap driven arc extinguishing and driving arc extinguishing by multipoint strong airflow Download PDFInfo
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- CN102486956B CN102486956B CN 201010569453 CN201010569453A CN102486956B CN 102486956 B CN102486956 B CN 102486956B CN 201010569453 CN201010569453 CN 201010569453 CN 201010569453 A CN201010569453 A CN 201010569453A CN 102486956 B CN102486956 B CN 102486956B
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Abstract
The invention relates to a lightning protection device, in particular to a lightning protection device with combination of multigap driven arc extinguishing and driving arc extinguishing by multipoint strong airflow, which is used for power transmission lines with all voltage grades. The lightning protection device is arranged on all iron caps of a line insulator string in parallel, a main discharging gap and a multigap driven arc extinguishing unit are connected in series, and the total flashover voltage is less than that of the protected insulator string, so that when the lines are struck by lightning, a product is punctured prior to the protected insulator string. A signal acquisition device acquires lightning current signals automatically and starts a gas generation device, so that high-speed air flow is generated instantaneously in a semi-enclosed space and extinguishes the arcs; and in the multigap driven arc extinguishing unit, air is rapidly heated by high-temperature arcs and expands, lengthens the arcs quickly and sprays out the arcs from air-guiding holes so as to extinguish the arcs. According to the lightning protection device, the structure is simple, the installation is convenient, and when the line is struck by the lightning, lightning current can be leaked into the ground quickly, and simultaneously the high-speed airflow is generated to extinguish power-flow current, so that electrical equipment is effectively protected and the power supply reliability is improved.
Description
Technical field
The present invention relates to a kind of lightning protection device, specifically the passive compound multiple spot air blast active arc extinguishing lightning protection device in a kind of many gaps for each electric pressure transmission line.
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 that affects power grid security.The impulse flashover that causes during the transmission line lightning strikes causes the line insulator flashover, then produces very large power frequency continued flow, damages insulator string and gold utensil, causes line accident.Traditional " blocking type " lightning protection mode due to its limitation, can not solve problem of lightning at all.Therefore the general employing of power department is installed gap or the leakage conductor protected in parallel additional at transmission line and is realized protective wire.Yet in actual motion, protection gap in parallel and leakage conductor have its obvious defective as follows:
At first, when the transmission line lightning strikes, the gap of protecting in parallel leaks into the earth preferentially because the overvoltage that thunderbolt causes punctures with 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 that causes after the insulator string flashover; electric arc is being protected long-time calcination between the 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.
Secondly, leakage conductor is expensive, use, maintenance cost is high, Leakage Current is large, and useful life is short, changes frequent, and the zinc oxide module used of leakage conductor under lightning impulse owing to there being obvious kelvin effect, under large electric current, easily blast, cause the circuit chromic trouble, is unfavorable for electrical network economy, safety, stable operation.
Summary of the invention
The object of the invention is to overcome the shortcoming in the above-mentioned background technology, initiatively arc extinguishing lightning protection device of the passive compound multiple spot air blast in a kind of many gaps is provided.the present invention is directed to the actual conditions of China's multi-thunder area transmission line, the a large amount of exploitative experiments that carry out, designed a kind of suspension insulator (porcelain that can be used for each electric pressure transmission line, glass) and the passive compound multiple spot air blast in many gaps of strain insulator string arc extinguishing lightning protection device initiatively, this device not only can have precedence over protected insulator string and puncture, and has the initiatively dual arc-suppression function that combines of arc extinguishing and the passive arc extinguishing in many gaps of air blast, puncture at protective device, after lightning current flows through, air blast active arc extinguishing unit and the passive arc extinguishing unit in many gaps move simultaneously, cut off immediately power frequency continued flow, reach the purpose of quick elimination thunderbolt ground connection or short trouble, and the quenching time is less than relaying protection operate time, thereby effectively guarantee power supply reliability.
the passive compound multiple spot air blast in this many gaps is the arc extinguishing lightning protection device initiatively, take insulator string ground connection side as order, this device comprises: the first insulator fixed support device, air blast is arc extinguishing unit initiatively, main discharge gap, second insulator fixed support device, the passive arc extinguishing unit in many gaps, the 3rd insulator fixed support device, last a slice insulator fixed support device, main discharge gap, high-field electrode and high-field electrode fixture, the passive compound multiple spot air blast in described many gaps initiatively arc extinguishing lightning protection device is installed in parallel in the corresponding chapeau de fer of line insulator string by fixed support device, at the air blast that is fixed in first insulator fixed support device arc extinguishing unit and being fixed between the metallic conductor fixed support device of second insulator initiatively, and be fixed in the air blast active arc extinguishing unit of last a slice insulator fixed support device and be fixed between the high-field electrode of yoke plate, form respectively the main discharge gap take air as dielectric, , connected by the passive arc extinguishing unit in many gaps between last a slice insulator fixed support device at the c of second insulator fixture end, in the passive arc extinguishing unit in many gaps, form the little discharging gap take air as dielectric between every two adjacent non-metal electrodes, a plurality of little air gap series connection in the passive arc extinguishing unit of main discharge gap and many gaps, its total flashover voltage is less than protected insulator string flashover voltage, thereby when transmission line is struck by lightning, this assembly first punctures, form discharge channel in a plurality of little discharging gap of power frequency continued flow in the passive arc extinguishing unit of main discharge gap and many gaps that continues, the protection insulator string is avoided the electric arc calcination.Gas generating unit is placed in the discharge channel of air blast active arc extinguishing unit, in the time of the protection spark-over of gap, the automatic collection signal of signal pickup assembly also starts gas generating unit, moment produces high velocity air, the high velocity jet air-flow at one end leaves in the semiclosed air flue of gas outlet, consumingly the electric arc in hemi-closure space is carried out cooling and side knock to arc extinction; Simultaneously, the electric arc in the arc extinguishing unit of passive many gaps sharply heats the air between adjacent two non-metal electrodes and makes its rapid expanding in the small space of sealing, and rapid elongating arc also sprays from gas port, plays the effect of auxiliary extinction of arc.The passive arc extinguishing unit internal electrode in many gaps adopts nonmetallic electric conducting material, the disruptive discharge calcination can not produce metallic vapour, be conducive to extinguishing of electric arc between the gap, and be uniform electric field between every two adjacent nonmetal spheric electrodes of the passive arc extinguishing unit in many gaps, can effectively prevent restriking after arc extinguishing, simultaneously, because each passive arc extinguishing unit in many gaps has very large electric capacity, the voltage when it is parallel to each sheet insulator whole insulator string will normally be moved distributes and improves.
The present invention has obvious advantage with respect to parallel connection gaps and leakage conductor; when circuit normally moves without afterflow; can start rapidly during the lightning strikes overvoltage; reliable arc extinguishing when " dredging " lightning current; and can be with arc extinction before the relay protection of transmission line action; thereby avoid line tripping to occur, thereby effectively protect power equipment, improve power supply reliability.But and repetitive operation, gas generating unit can charged for replacement.Because the time compole that electric arc continues is short, electrode material can steady in a long-term move substantially without ablation.
Description of drawings
Fig. 1 is structure chart of the present invention
Fig. 2 is the passive arc extinguishing unit schematic diagrames in the many gaps in the present invention
Fig. 3 is the air blast active arc extinguishing unit schematic diagram in the present invention
Fig. 4 is the insulator fixed support device schematic diagram in the present invention
Embodiment
Describe the initiatively execution mode of arc extinguishing lightning protection device of the passive compound multiple spot air blast in many gaps of the present invention in detail below in conjunction with accompanying drawing.
referring to Fig. 1, the passive compound multiple spot air blast in this many gaps is the arc extinguishing lightning protection device initiatively, take insulator string ground connection side as order, this device comprises: first insulator fixed support device 1, air blast is arc extinguishing unit 2 initiatively, main discharge gap 3, second insulator fixed support device 4, the passive arc extinguishing unit 5 in many gaps, the 3rd insulator fixed support device 6, last a slice insulator fixed support device 7, main discharge gap 8, high-field electrode 9 and high-field electrode fixture 10, the passive compound multiple spot air blast in described many gaps initiatively arc extinguishing lightning protection device is installed in parallel in the corresponding chapeau de fer of line insulator string by fixed support device, at the air blast that is fixed in first insulator fixed support device 1 arc extinguishing unit 2 and being fixed between the metallic conductor fixed support device 4 of second insulator initiatively, and be fixed in the air blast active arc extinguishing unit 2 of last a slice insulator fixed support device 7 and be fixed between the high-field electrode 9 of yoke plate, form respectively the main discharge gap 3 and 8 take air as dielectric, , connected by the passive arc extinguishing unit 5 in many gaps between last a slice insulator fixed support device 7 at the c of second insulator fixture 4 end, in the passive arc extinguishing unit 5 in many gaps, form the little discharging gap take air as dielectric between every two adjacent non-metal electrodes, main discharge gap 3,8 and the passive arc extinguishing unit 5 in many gaps in the series connection of a plurality of little air gap, its total flashover voltage is less than protected insulator string flashover voltage, thereby when transmission line is struck by lightning, this assembly first punctures, form discharge channel in a plurality of little discharging gap of power frequency continued flow in the passive arc extinguishing unit of main discharge gap and many gaps that continues, the protection insulator string is avoided the electric arc calcination.Gas generating unit is placed in the discharge channel of air blast active arc extinguishing unit 2, in the time of the protection spark-over of gap, the automatic collection signal of signal pickup assembly also starts gas generating unit, moment produces high velocity air, the high velocity jet air-flow at one end leaves in the semiclosed air flue of gas outlet, consumingly the electric arc in hemi-closure space is carried out cooling and side knock to arc extinction; Simultaneously, the electric arc in passive many gaps arc extinguishing unit 5 sharply heats the air between adjacent two non-metal electrodes and makes its rapid expanding in the small space of sealing, and rapid elongating arc also sprays from gas port, plays the effect of auxiliary extinction of arc.Passive arc extinguishing unit 5 internal electrodes in many gaps adopt nonmetallic electric conducting material, the disruptive discharge calcination can not produce metallic vapour, be conducive to extinguishing of electric arc between the gap, and be uniform electric field between every two adjacent nonmetal spheric electrodes of the passive arc extinguishing unit 5 in many gaps, can effectively prevent restriking after arc extinguishing, simultaneously, because the passive arc extinguishing unit 5 in each many gap has very large electric capacity, the voltage when it is parallel to each sheet insulator whole insulator string will normally be moved distributes and improves.
Transmission line is normally in service, the potential difference at this device two ends equals the circuit phase voltage, reach far away the disruptive critical voltage of this device, device can be not breakdown and no current pass through, thereby the signal pickup assembly induction can not start gas generating unit less than lightning current yet; During the transmission line lightning strikes (direct lightning strike or induction thunder); the overvoltage ripple that produces arrives the line insulator string place by wire transmission; because the flashover voltage of this device preferentially punctures lower than the flashover voltage of protected insulator string; lightning current is leaked into the earth; reduce superpotential amplitude, thereby play the effect of protection insulator string and circuit and electric equipment.Simultaneously, when lightning current flow through conductor, signal pickup assembly induction lightening stream also started rapidly initiatively arc extinguishing unit of air blast automatically, and moment produces the high velocity jet air-flow.Because this air-flow has high speed, can produce greatly electric arc and impact, the electric arc in hemi-closure space is elongated by sharply cooling the time, extinguishes thereby can not be maintained until; Simultaneously, the electric arc that produces in the arc extinguishing unit of passive many gaps sharply heats the air between adjacent two non-metal electrodes and makes its rapid expanding in the small space of sealing, and rapid elongating arc also sprays from gas port, plays the effect of auxiliary extinction of arc.Because the passive arc extinguishing unit internal electrode in many gaps adopts nonmetallic electric conducting material, the disruptive discharge calcination can not produce metallic vapour, be conducive to extinguishing of electric arc between the gap, and be uniform electric field between every two adjacent nonmetal spheric electrodes in the passive arc extinguishing unit in many gaps, can effectively prevent restriking after arc extinguishing, simultaneously, because each passive arc extinguishing unit in many gaps has very large electric capacity, the voltage when it is parallel to each sheet insulator whole insulator string will normally be moved distributes and improves.
Fig. 2 is the passive arc extinguishing unit schematic diagrames in the many gaps in the present invention, it has a high-temperature insulation material shell, nonmetal spheric electrode encapsulation in the enclosure, the air gap distance that forms between every two adjacent non-metal electrodes is less than half of described nonmetal spheric electrode radius, and each air gap has the discharge gas port, when disruptive discharge, the electric arc that produces in the arc extinguishing unit of passive many gaps sharply heats the air between adjacent two nonmetal spheric electrodes and makes its rapid expanding in the small space of sealing, rapid elongating arc also sprays from gas port, play the effect of auxiliary extinction of arc.
Fig. 3 is the air blast active arc extinguishing unit schematic diagram in the present invention, it has a semiclosed high-temperature insulation material shell, gas generating unit is placed near the air gap that forms between inner two spheric electrodes semiclosed air flue, when conductor electrode had lightning current to flow through, the high velocity jet gas that automatically starts generation acted on the gas that produces after electric arc and action and is expelled to atmosphere from the gas outlet.
Fig. 4 is the insulator fixed support device schematic diagram in the present invention, and the first insulator fixed support device is metallic conductor, and second insulator string fixed support device is metallic conductor, and its both ends horizontal direction is 180 ° of layouts; The 3rd fixed support device to second from the bottom insulator is insulator, and 180 ° of layouts of the fixed support device horizontal direction between adjacent two, and fixed support device is fixed in each sheet insulator cap and forms and is fastenedly connected.
The present invention has obvious advantage with respect to parallel connection gaps and leakage conductor, without afterflow, can start rapidly reliable arc extinguishing in the time of " dredging " lightning current when circuit normally moves during the lightning strikes overvoltage; And have air blast initiatively arc extinguishing unit and the passive arc extinguishing unit in many gaps, two kinds of arc quenching methods combine can moment arc extinguishing, thereby make the duration of electric arc extremely short, electrode material is substantially without ablation, can be with arc extinction before relay protection of transmission line action, thus avoid line tripping to occur; Described device can be by the closely spaced number in the passive arc extinguishing unit of distance and many gaps of adjusting main discharge gap to adapt to different electric pressures.Fixed support device can adapt to dissimilar insulator cap, and the kicker magnet fixed form that gas generating unit adopts is easily changed, thereby this device can Reusability, reaches once mounting, repeatedly the purpose of income.Greatly save investment.And the gas that this device produces is safe from harm to biological, environment, meets environmental requirement.
Although invention has been described; but foregoing description just for illustrative purposes; the invention is not restricted to above-mentioned specific descriptions by reference to the accompanying drawings; those of ordinary skills have the ability that it is not broken away from the various changes of spirit of the present invention, and protection scope of the present invention is defined by the claims.
Claims (2)
1. the passive compound multiple spot air blast in gap more than kind arc extinguishing lightning protection device initiatively, take insulator string ground connection side as order, this device comprises: first insulator fixed support device (1), air blast is arc extinguishing unit (2) initiatively, main discharge gap (3), second insulator fixed support device (4), the passive arc extinguishing units in many gaps (5), the 3rd insulator fixed support device (6), last a slice insulator fixed support device (7), main discharge gap (8), high-field electrode (9) and high-field electrode fixture (10), the passive compound multiple spot air blast in described many gaps initiatively arc extinguishing lightning protection device is installed in parallel in the corresponding chapeau de fer of line insulator string by fixed support device, it is characterized in that: the b of first insulator fixed support device (1) holds connection and is fixed to the first insulator chapeau de fer, air blast active arc extinguishing unit (2) is connected to a end of first insulator fixed support device (1), and and form main discharge gap (3) between a of second insulator fixed support device (4) end, the b of second insulator fixed support device (4) holds connection and is fixed in second insulator cap, be connected in second insulator fixed support device (4) c end air blast initiatively arc extinguishing unit (2) and the air blast that is connected in a end of the 3rd insulator fixed support device (6) initiatively connected by the passive arc extinguishing units in many gaps (5) between arc extinguishing unit (2), the b end connection of the 3rd insulator fixed support device (6) and be fixed in the 3rd insulator cap, connected mode between the fixed support device of the 3rd extremely last a slice insulator, the passive arc extinguishing unit in many gaps and air blast active arc extinguishing unit is identical with the connected mode between second and the 3rd, the b end of the fixed support device (7) of last a slice insulator connects and is fixed in last a slice insulator cap, air blast initiatively arc extinguishing unit (2) be connected to last a slice insulator fixed support device (7) a end and and a end of high-field electrode (9) between form main discharge gap (8), the b end of high-field electrode (9) connects by high-field electrode fixture (10) and is fixed in the line side yoke plate,
The nonmetal spheric electrode of the passive arc extinguishing unit in described many gaps (5) is encapsulated in insulation crust, the air gap distance that forms between adjacent two nonmetal spheric electrodes is less than half of described nonmetal spheric electrode radius, and each air gap has the discharge gas port;
Described air blast initiatively arc extinguishing unit (2) has a semiclosed high-temperature insulation material shell, gas generating unit is placed near the air gap that forms between inner two spheric electrodes semiclosed air flue, and the end of semiclosed air flue leaves the gas outlet.
2. the passive compound multiple spot air blast in many gaps according to claim 1 arc extinguishing lightning protection device initiatively, it is characterized in that, it is characterized in that, first insulator fixed support device (1) is conductor, second insulator fixed support device (4) is also conductor, and its a, c end horizontal direction 180 degree are arranged; The 3rd fixed support device to last a slice insulator is insulator, and the fixed support device horizontal direction between adjacent two is 180 degree layouts.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010569453 CN102486956B (en) | 2010-12-02 | 2010-12-02 | Lightning protection device with combination of multigap driven arc extinguishing and driving arc extinguishing by multipoint strong airflow |
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| CN 201010569453 CN102486956B (en) | 2010-12-02 | 2010-12-02 | Lightning protection device with combination of multigap driven arc extinguishing and driving arc extinguishing by multipoint strong airflow |
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| CN102486956A CN102486956A (en) | 2012-06-06 |
| CN102486956B true CN102486956B (en) | 2013-06-26 |
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| CN 201010569453 Active CN102486956B (en) | 2010-12-02 | 2010-12-02 | Lightning protection device with combination of multigap driven arc extinguishing and driving arc extinguishing by multipoint strong airflow |
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| US10894610B2 (en) | 2017-06-05 | 2021-01-19 | The Boeing Company | Jet stream lightning protection apparatus, system, and method the same |
| CN107481822B (en) * | 2017-08-24 | 2023-11-03 | 王巨丰 | Split combined type compression arc extinguishing pipe |
| CN211238811U (en) * | 2019-06-20 | 2020-08-11 | 南宁超伏电气科技有限公司 | Multistage recoil arc control device of low-voltage system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101159368A (en) * | 2007-09-28 | 2008-04-09 | 王巨丰 | Air blast arc-quenching lightning protection inter space device |
| CN201478816U (en) * | 2009-04-16 | 2010-05-19 | 王嬿蕾 | Air blowing and variable gap arc extinguishing lightning protection gap device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2619601B2 (en) * | 1993-05-26 | 1997-06-11 | 日本碍子株式会社 | Lightning insulator |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101159368A (en) * | 2007-09-28 | 2008-04-09 | 王巨丰 | Air blast arc-quenching lightning protection inter space device |
| CN201478816U (en) * | 2009-04-16 | 2010-05-19 | 王嬿蕾 | Air blowing and variable gap arc extinguishing lightning protection gap device |
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| JP平6-333453A 1994.12.02 |
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