CN102737795A - 10-35kV overhead transmission line constraint space injection gas arc extinguishing lightning protection gap apparatus - Google Patents
10-35kV overhead transmission line constraint space injection gas arc extinguishing lightning protection gap apparatus Download PDFInfo
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- CN102737795A CN102737795A CN2011100902882A CN201110090288A CN102737795A CN 102737795 A CN102737795 A CN 102737795A CN 2011100902882 A CN2011100902882 A CN 2011100902882A CN 201110090288 A CN201110090288 A CN 201110090288A CN 102737795 A CN102737795 A CN 102737795A
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Abstract
本发明涉及一种防雷保护装置，特别是一种适用于10～35kV架空输电线路的10～35kV架空输电线路约束空间喷射气体灭弧防雷间隙。该装置并联安装于线路绝缘子串两端，保护间隙之间的闪络电压小于被保护绝缘子串，从而在输电线路遭受雷击时优先于被保护绝缘子串击穿，击穿放电时，信号采集装置自动感应雷电流信号并触发高速喷射气体发生装置，瞬间产生高速喷射气流对约束空间内续流电弧沿纵向强烈冲击、冷却至熄灭。本发明结构简单，安装、维护方便，其在线路发生雷击时可快速将雷电流泄入大地的同时产生高速气流熄灭工频续流，从而有效地保护电力设备，提高供电可靠性。
The invention relates to a lightning protection device, in particular to a 10-35kV overhead transmission line suitable for a 10-35kV overhead transmission line constrained space spray gas arc extinguishing lightning protection gap. The device is installed in parallel at both ends of the line insulator strings, and the flashover voltage between the protection gaps is lower than that of the protected insulator strings, so that when the transmission line is struck by lightning, it breaks down prior to the protected insulator strings. When the breakdown discharges, the signal acquisition device automatically The lightning current signal is sensed and the high-speed jet gas generating device is triggered, and the high-speed jet gas flow is instantly generated to strongly impact the freewheeling arc in the confined space along the longitudinal direction, and cool down until it is extinguished. The invention has simple structure and is convenient for installation and maintenance. When a lightning strike occurs on the line, it can quickly release the lightning current into the ground and at the same time generate a high-speed airflow to extinguish the power frequency continuous flow, thereby effectively protecting the electric equipment and improving the reliability of power supply.
Description
Technical field
The present invention relates to a kind of lightning protection device, specifically a kind of 10～35kV overhead transmission line constraint space jet gas arc extinguishing lightning protection inter space device that is used for 10～35kV overhead transmission line.
Background technology
The transmission line lightning protection always is the important content of power department lightning protection work, and lightning fault remains one of key factor that influences power grid security.The impulse flashover that transmission line causes when thunderbolt takes place causes the line insulator flashover, produces very big power frequency continued flow then, damages insulator string and gold utensil, causes line accident.Traditional " obstruction type " lightning protection mode is because its limitation can not solve the thunderbolt problem at all.So power department generally is employed in, and transmission line installs parallel connection protection gap additional or leakage conductor is realized protective wire.Yet in the actual motion, parallel connection protection gap and leakage conductor all have its obvious defects following:
At first, when thunderbolt took place transmission line, parallel connection protection gap leaked into the earth preferentially because of 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 behind the insulator string flashover; Electric arc is long-time calcination between the protection gap, will cause insulator string to damage, when serious; Possibly 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 costs an arm and a leg, use, maintenance cost height; Leakage Current is big, and useful life is short, changes frequent; And the zinc oxide module used of leakage conductor under lightning impulse owing to there is tangible kelvin effect; Big electric current is blast easily down, causes the circuit chromic trouble, is unfavorable for electrical network economy, safety, stable operation.
Summary of the invention
The objective of the invention is to overcome the shortcoming in the above-mentioned background technology, a kind of 10～35kV overhead transmission line constraint space jet gas arc extinguishing lightning protection inter space device that is applicable to 10～35kV overhead transmission line is provided.The present invention is directed to the actual conditions of China multi-thunder area 10～35kV overhead transmission line; The a large amount of exploitative experiments that carry out have been designed a kind of suspension insulator (porcelain, glass) of 10～35kV overhead transmission line and 10～35kV overhead transmission line constraint space jet gas arc extinguishing lightning protection inter space device of strain insulator string of can be used for, and this device is when thunderbolt takes place transmission line; Not only can have precedence over by the protection insulator string and puncture; And have initiatively arc extinguishing function of very strong constraint space air blast, puncture at protective device, after lightning current flows through; Gas generating unit action generation high velocity air extinguishes power frequency continued flow in the constraint space; Reach the purpose of quick elimination thunderbolt ground connection or short trouble, and the quenching time less than relaying protection operate time, thereby effectively guarantee the reliability of supplying power.
This 10～35kV overhead transmission line constraint space jet gas arc extinguishing lightning protection inter space device comprises: ground connection lateral electrode fixture, ground connection lateral electrode, gap in arcing chamber fixture, gap in arcing chamber noncontinuous electrode, signal pickup assembly, insulated enclosure housing, gas generating unit, hydrophobicity shirt rim, gap in arcing chamber puff prot, main discharge gap, lead lateral electrode, lead lateral electrode fixture, embedded iron block, kicker magnet and gas generating unit switch sheet metal; Said 10～35kV overhead transmission line constraint space jet gas arc extinguishing lightning protection inter space is in parallel installed with in the line insulator string two ends through fixture; Form main discharge gap between gap in arcing chamber noncontinuous electrode and the lead lateral electrode; The flashover voltage of main discharge gap is less than the flashover voltage of being protected insulator string; Thereby, transmission line preferentially punctures when being struck by lightning; The power frequency continued flow that continues forms the electrical discharge arc passage between main discharge gap, the protection insulator string is avoided the electric arc calcination; 3 gas generating units are installed in the insulated enclosure housing of constraint space; When thunderbolt takes place in transmission line; The automatic acquired signal of signal pickup assembly also starts gas generating unit, and the high velocity jet air-flow of generation acts on the electric arc in the arc extinguishing cavity and causes impact of collision to be cooled to electric arc and extinguish.
Signal pickup assembly is installed in series in the gap in arcing chamber noncontinuous electrode; And be connected to the gas generating unit of trigger position; 3 gas generating unit sequence startings when thunderbolt takes place; High velocity jet gas shock gas generating unit after gas generating unit starts switches sheet metal, as the necessary condition of next jet gas generating means startup; The outside hydrophobicity shirt rim of insulation shell can effectively prevent the flashover of rainy day generation along the insulation shell surface.
The present invention has remarkable advantages with respect to parallel connection gaps and leakage conductor; When circuit normally moves, do not have afterflow, can start reliable arc extinguishing in the time of " dredging " lightning current rapidly when Lightning Over-voltage takes place; And can be with arc extinction before the relay protection of transmission line action; Thereby avoid line tripping to take place, thereby protect power equipment effectively, 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 does not have ablation basically, can steady in a long-term move.
Description of drawings
Fig. 1 is a structure chart of the present invention
Fig. 2 is that gas generating unit starts the switching sketch map among the present invention
Embodiment
Describe the execution mode of 10～35kV overhead transmission line constraint space jet gas arc extinguishing lightning protection inter space of the present invention in detail below in conjunction with accompanying drawing.
Fig. 1 is a structure chart of the present invention; This 10～35kV overhead transmission line constraint space jet gas arc extinguishing lightning protection inter space device; This device comprises: ground connection lateral electrode fixture (1), ground connection lateral electrode (2), gap in arcing chamber fixture (3), gap in arcing chamber noncontinuous electrode (4), signal pickup assembly (5), insulated enclosure housing (6), gas generating unit (7), hydrophobicity shirt rim (8), gap in arcing chamber puff prot (9), main discharge gap (10, lead lateral electrode (11), lead lateral electrode fixture (12), embedded iron block (13), kicker magnet (14) and gas generating unit switch sheet metal (15); Said 10～35kV overhead transmission line constraint space jet gas arc extinguishing lightning protection inter space is in parallel installed with in the line insulator string two ends through fixture; It is characterized in that: being used to connect lead and forming the end that the reliable lead lateral electrode fixture (12) that is connected connects main discharge gap (10) with lead is lead lateral electrode (11); Reliably be connected gap in arcing chamber fixture (3) with ground connection lateral electrode (2); The other end that is connected to main discharge gap (10) is gap in arcing chamber noncontinuous electrode (4); Be connected to the other end of ground connection lateral electrode (2) with the ground connection lateral electrode fixture (1) that earth electrode reliably is connected; Signal pickup assembly (5) is series at gap in arcing chamber noncontinuous electrode (4); Three gas generating units (7) place near the insulated enclosure housing (6) gap in arcing chamber noncontinuous electrode (4) the on-fixed end; And insulated enclosure housing (6) outside has hydrophobicity shirt rim (8), and the high velocity jet air-flow that gas generating unit (7) produces vertically acts on electric arc and sprays along gap in arcing chamber puff prot (9).
Transmission line is normally in service; The potential difference at these device two ends equals the circuit phase voltage; Reach the disruptive critical voltage of this device far away, 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; When thunderbolt takes place in transmission line (direct lightning strike is perhaps responded to thunder); The overvoltage ripple that produces is transferred to the line insulator string place through lead; Because being lower than by the flashover voltage of protection insulator string, the flashover voltage of this device preferentially punctures; 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 initiatively arc extinguishing unit of constraint space air blast rapidly automatically, and moment produces the high velocity jet air-flow.Because this air-flow has high speed, can produce great the impact to electric arc, the electric arc in the constraint space is elongated when sharply being cooled off, and extinguishes thereby can not be maintained until; Simultaneously, the insulated enclosure inner walls adopts gas exhausted material, under the high-temperature electric arc effect, produces gases at high pressure, can quicken impact and cooling to electric arc, plays the effect of auxiliary arc extinguishing.
Fig. 2 is that gas generating unit starts the switching sketch map among the present invention; Three gas generating units (7) superpose vertically and arrange and embedded iron block (13) is equipped with in inside; Sequence starting when gas generating unit (7) at transmission line thunderbolt takes place; When under action of gravity, falling to kicker magnet (14) position and its adhesive; And form with signal pickup assembly (5) and reliably to be connected, the high velocity jet gas shock gas generating unit after gas generating unit (7) starts switches sheet metal (15), as the necessary condition of next jet gas generating means (7) startup.
Each gas generating unit all is equipped with and switches sheet metal and embedded iron block, when gas generating unit in action of gravity, when falling to trigger position, gas generating unit is by the kicker magnet adhesive and be connected triggering loop conducting with signal pickup assembly; Simultaneously, switch sheet metal and housing inner groovy and combine, effectively support gas generating unit; The high-speed gas that gas generating unit action back produces impacts and switches sheet metal when coming off; Produce reaction force; Make it break away from the magnetic force adhesive and ejection from device; Next gas generating unit slides to trigger position under automatic under action of gravity, thereby realizes that three gas generating units switch in proper order.
The present invention has remarkable advantages with respect to parallel connection gaps and leakage conductor, when circuit normally moves, does not have afterflow, can start reliable arc extinguishing in the time of " dredging " lightning current rapidly when Lightning Over-voltage takes place; And has constraint space air blast active arc extinguishing and arc extinguishing cavity produce the gases at high pressure arc extinguishing under the high-temperature electric arc effect double action; Thereby make that the duration of electric arc is extremely short; Electrode material does not have ablation basically; Can be with arc extinction before relay protection of transmission line action, thus avoid line tripping to take place; Said device can through the adjustment main discharge gap distance to adapt to the different voltages with different grade.Fixed support device can adapt to dissimilar insulator strings, and gas generating unit adopts sequence starting and changes easily, thereby this device can use repeatedly, reaches once mounting, repeatedly the purpose of income.Greatly practice thrift investment.And the gas that this device produces is safe from harm compliance with environmental protection requirements to biological, environment.
Although invention has been described; But foregoing description just for illustrative purposes; The invention is not restricted to the above-mentioned specific descriptions that combine accompanying drawing; 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 (3)
1. 10～35kV overhead transmission line constraint space jet gas arc extinguishing lightning protection inter space device; This device comprises: ground connection lateral electrode fixture (1), ground connection lateral electrode (2), gap in arcing chamber fixture (3), gap in arcing chamber noncontinuous electrode (4), signal pickup assembly (5), insulated enclosure housing (6), gas generating unit (7), hydrophobicity shirt rim (8), gap in arcing chamber puff prot (9), main discharge gap (10), lead lateral electrode (11), lead lateral electrode fixture (12), embedded iron block (13), kicker magnet (14) and gas generating unit switch sheet metal (15); Said 10～35kV overhead transmission line constraint space jet gas arc extinguishing lightning protection inter space is in parallel installed with in the line insulator string two ends through fixture; It is characterized in that: being used to connect lead and forming the end that the reliable lead lateral electrode fixture (12) that is connected connects main discharge gap (10) with lead is lead lateral electrode (11); Reliably be connected gap in arcing chamber fixture (3) with ground connection lateral electrode (2); The other end that is connected to main discharge gap (10) is gap in arcing chamber noncontinuous electrode (4); Be connected to the other end of ground connection lateral electrode (2) with the ground connection lateral electrode fixture (1) that earth electrode reliably is connected; Signal pickup assembly (5) is series at gap in arcing chamber noncontinuous electrode (4); Three gas generating units (7) place near the insulated enclosure housing (6) gap in arcing chamber noncontinuous electrode (4) the on-fixed end; And insulated enclosure housing (6) outside has hydrophobicity shirt rim (8), and the high velocity jet air-flow that gas generating unit (7) produces vertically acts on electric arc and sprays along gap in arcing chamber puff prot (9).
2. 10～35kV overhead transmission line constraint space jet gas arc extinguishing lightning protection inter space device according to claim 1; It is characterized in that; Three gas generating units (7) superpose vertically and arrange and embedded iron block (13) is equipped with in inside; Sequence starting when three gas generating units (7) at transmission line thunderbolt take place with its adhesive, and reliably is connected with signal pickup assembly (5) formation when under action of gravity, falling to kicker magnet (14) position; High velocity jet gas shock gas generating unit after gas generating unit (7) starts switches sheet metal (15), as the necessary condition of next jet gas generating means (7) startup.
3. 10～35kV overhead transmission line constraint space jet gas arc extinguishing lightning protection inter space device according to claim 1; It is characterized in that; The gas exhausted material that insulated enclosure housing (6) adopts produces gases at high pressure under the high-temperature electric arc effect, discharge from gap in arcing chamber puff prot (9) after acting on electric arc.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110090288.2A CN102737795B (en) | 2011-04-12 | 2011-04-12 | 10-35kV overhead transmission line constraint space injection gas arc extinguishing lightning protection gap apparatus |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110090288.2A CN102737795B (en) | 2011-04-12 | 2011-04-12 | 10-35kV overhead transmission line constraint space injection gas arc extinguishing lightning protection gap apparatus |
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| CN102737795A true CN102737795A (en) | 2012-10-17 |
| CN102737795B CN102737795B (en) | 2014-04-16 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN104240868A (en) * | 2014-10-11 | 2014-12-24 | 国家电网公司 | Line insulator and horn-shaped gap thereof |
| CN104701735A (en) * | 2015-02-10 | 2015-06-10 | 王巨丰 | Repeated thunder arc cutting type arrester |
| CN107705941A (en) * | 2017-09-28 | 2018-02-16 | 上海兆邦电力器材有限公司 | For the arc-blowing device on electric power circuit insulator class electrical equipment |
| CN107768048A (en) * | 2017-09-28 | 2018-03-06 | 上海兆邦电力器材有限公司 | Power frequency continued flow arc breaking device |
| CN110001406A (en) * | 2017-12-20 | 2019-07-12 | 申克碳素技术有限责任公司 | Osculating element and method |
| CN110768231A (en) * | 2018-07-25 | 2020-02-07 | 中国石油化工股份有限公司 | Arc extinguishing device and method for transmission and distribution lines |
| CN111834892A (en) * | 2019-04-15 | 2020-10-27 | 王巨丰 | Sealing method based on lightning-protection arc-extinguishing airflow channel interface |
| CN112117070A (en) * | 2019-06-20 | 2020-12-22 | 王巨丰 | Full-span insulation matching method and device for eliminating span central direct flashover |
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Cited By (13)
| 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 |
| CN104240868A (en) * | 2014-10-11 | 2014-12-24 | 国家电网公司 | Line insulator and horn-shaped gap thereof |
| CN104701735A (en) * | 2015-02-10 | 2015-06-10 | 王巨丰 | Repeated thunder arc cutting type arrester |
| CN107705941A (en) * | 2017-09-28 | 2018-02-16 | 上海兆邦电力器材有限公司 | For the arc-blowing device on electric power circuit insulator class electrical equipment |
| CN107768048A (en) * | 2017-09-28 | 2018-03-06 | 上海兆邦电力器材有限公司 | Power frequency continued flow arc breaking device |
| CN110001406A (en) * | 2017-12-20 | 2019-07-12 | 申克碳素技术有限责任公司 | Osculating element and method |
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| CN110768231A (en) * | 2018-07-25 | 2020-02-07 | 中国石油化工股份有限公司 | Arc extinguishing device and method for transmission and distribution lines |
| CN111834892A (en) * | 2019-04-15 | 2020-10-27 | 王巨丰 | Sealing method based on lightning-protection arc-extinguishing airflow channel interface |
| CN111834892B (en) * | 2019-04-15 | 2023-08-11 | 王巨丰 | Sealing method based on lightning protection and arc extinguishing airflow channel interface |
| CN112117070A (en) * | 2019-06-20 | 2020-12-22 | 王巨丰 | Full-span insulation matching method and device for eliminating span central direct flashover |
| CN112117070B (en) * | 2019-06-20 | 2022-03-08 | 王巨丰 | Full-span insulation matching method and device for eliminating span central direct flashover |
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