CN104332827A - Lighting protection device - Google Patents
Lighting protection device Download PDFInfo
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- CN104332827A CN104332827A CN201410659971.7A CN201410659971A CN104332827A CN 104332827 A CN104332827 A CN 104332827A CN 201410659971 A CN201410659971 A CN 201410659971A CN 104332827 A CN104332827 A CN 104332827A
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- control device
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Abstract
The invention relates to a lightning protection device which comprises a shell and electrodes. Arc extinguishing chambers and at least two electrode chambers are formed in the shell, the inner-wall surface of each arc extinguishing chamber is round and smooth, the arc extinguishing chambers and the electrode chambers are arranged in a staggered manner, each arc extinguishing chamber is provided with two openings which are communicated with the two adjacent electrode chambers respectively, and each arc extinguishing chamber is communicated with the outside through an arc blowing passage; a lightning receiving face is arranged at each of two ends of each electrode, the electrodes are placed in the electrode chambers, the lightning receiving faces at the two ends of the electrodes are exposed in the arc extinguishing chambers on two sides of the electrode chambers at the same time to communicate the arc extinguishing chambers on the two sides, and a flashover gap is reserved between the two lightning receiving faces in each arc extinguishing chamber. The lightning protection device is free of charge accumulation effect, less prone to being broken down under identical gap voltage and capable of improving line insulation level; especially when being on a high-voltage power distribution line network, influence on power distribution quality caused by voltage fluctuation of the power distribution network due to great lowering of voltage of the power distribution network because of frequent misoperation discharging of the lightning protection device can be avoided.
Description
Technical field
Patent of the present invention relates to power system high tension power line anti-thunder technical field, is specifically related to a kind of lightning protection device.
Background technology
Along with the research that deepens continuously of circuit on power system lightning protection device, the application of various novel lightning protection device is maked rapid progress.Series multiple clearance lightning-proof device, utilize the characteristic of high pressure technique intermediate gap electric arc to carry out lightning Protection Design, but in existing clearance lightning-proof device, the quenching time is long, easily causes system relay protection action and trips; Have employed electric arc calcination gas exhausted material and produce gas push power to complete the elongation of electric arc, cooling and extinguishing.Along with the reduction of the consumption of material, useful life can be affected at the lightning protection properties of device after repeatedly lightning stroke flashover.
Summary of the invention
Based on this, the present invention discloses a kind of lightning protection device and lightning protection device arc control device volume calculations method, this lightning protection device action effectively, guarantee that lightning protection function normally plays a role, these computational methods are used to design arc control device volume, make that lightning protection device arc extinguishing operate time is short, arc-rupturing capacity strong, the break time of lightning protection device continuous several times work is short.
A kind of lightning protection device, comprising: shell, has arc control device and at least two electrode chambers in it; Wherein, arc control device and electrode chamber are staggered successively, and arc control device have two openings to be communicated with adjacent two electrode chambers respectively, and arc control device inner wall surface is round and smooth, has arc blow-out passage to be in communication with the outside by arc control device.
A kind of lightning protection device, comprising: shell, has arc control device and at least two electrode chambers in it, arc control device inner wall surface is round and smooth, arc control device and electrode chamber are staggered, and arc control device have two openings to be communicated with adjacent two electrode chambers respectively, have arc blow-out passage to be in communication with the outside by arc control device; Electrode, two ends respectively have one to connect sudden strain of a muscle face, and electrode is placed in electrode chamber, and the sudden strain of a muscle face that connects at electrode two ends is exposed in the arc control device of electrode chamber both sides, by both sides arc control device electric connection simultaneously, and two in arc control device connect between sudden strain of a muscle face and leave flashover gap.
Wherein in an embodiment, described arc control device are spherical.
Wherein in an embodiment, the volume V of described arc control device is determined by the air pressure of the lightning current characteristic of being struck by lightning, ambient atmosphere and specific heat capacity, meet in a lightning stroke process, under the air pressure and specific heat capacity of the ambient atmosphere of specifying, the gas-heated of arc control device is obtained maximum swelling merit by lightning current.
Wherein in an embodiment, described arc control device inwall has increasing to climb groove, and described increasing climbs grooved ring around flashover gap.
Wherein in an embodiment, described increasing is climbed groove and is extended to described arc blow-out passage and extend in described arc blow-out passage.
Wherein in an embodiment, described in connect sudden strain of a muscle face be hemisphere.
Wherein in an embodiment, described in connect the hemispheric diameter D in sudden strain of a muscle face and flashover gap d and meet: D is more than or equal to d/2.
Wherein in an embodiment, the width of described arc blow-out passage is greater than the minimum range in described flashover gap, is less than the Breadth Maximum of described arc control device cross section.
Below the advantage of above-mentioned lightning protection device and lightning protection device arc control device volume calculations method or principle are described:
1, lightning protection device is when being impacted by Lightning Over-voltage, Lightning Over-voltage is applied on arc control device unit by electrode, when arc control device two end electrodes suffers impulse overvoltage, there is flashover in the flashover gap between two electrodes, the air in arc control device is sharply added thermal expansion.In arc control device, arc-plasma produces arc blow-out effect under electric field, magnetic field, flow field and aerodynamic multiple action, blown by electric arc disconnected, reach automatic arc quenching effect, arc control device adopt non-gas exhausted material manufacture, can ignore in whole process material consumption, on useful life of lightning protection device without impact;
Arc control device inner wall surface is round and smooth, inwall is round and smooth, and when being struck by lightning, arc control device inner wall charge is evenly distributed, there is no charge accumulation effects, under identical gap voltage, be not easy breakdown, line insulation grade can be improved, particularly online at high-tension distributing line, the frequent misoperation electric discharge of lightning protection device can be avoided, cause high voltage distribution network voltage degradation, cause distribution network voltage influence of fluctuations distribution quality.
2, arc control device are circular form, and arc control device, relative to spherical symmetric, make the electric charge of distribution on it more even, obtain better insulation effect.
3, the volume V of arc control device is determined by the air pressure of the lightning current characteristic of being struck by lightning, ambient atmosphere and specific heat capacity, meets in a lightning stroke process, and under the air pressure and specific heat capacity of the ambient atmosphere of specifying, the gas-heated of arc control device is obtained maximum swelling merit by lightning current.When needs ensure that arc control device inwall is round and smooth, be inconvenient to revise arc control device inner wall shape and optimize arc blow-out effect, the present invention optimizes the design of arc control device volume from thunderbolt characterisitic parameter and external environment characterisitic parameter, obtain desirable arc blow-out effect, flashover arc can be promoted fast along arc blow-out channel injection in ambient atmosphere environment, make when lightning protection device suffers the thunder and lightning thunderbolt of this kind of characteristic, the quenching time is short, and arc quenching effect is best.Extend at flashover arc, its motional impedance obtains good cooling effect while increasing, and can fast, effectively cut off lightning stroke flashover electric arc and discharge its energy.
Further, can, according to lightning protection region meteorological data for many years, select the highest lightning performance of this field frequency to design arc control device volume, be that lightning protection obtains best lightning protection properties.Also can select the common lightning performance in multiple lightning protection region, have corresponding lightning protection device at distribution Net-based Design for the thunder and lightning of different qualities, obtain comprehensively, effective lightning protection effect.
4, increasing climbs groove for extending the creepage distance between adjacent electrode, improve the inner edge flashing voltage of arc control device, guarantee that each overvoltage flashover occurs, between adjacent electrodes on the shortest physical connection path, to make arc control device each lightning impulse operation voltage numerical discretization little.Particularly when arc control device are spheroidal, when arc control device volume is identical, spherical area is minimum, and creepage distance is the shortest, sets up and climbs the class of insulation that groove effectively can improve circuit.
5, the hemispheric diameter D in the sudden strain of a muscle face that connects and flashover gap d meet: D is more than or equal to d/2, make the Electric Field Distribution between the sudden strain of a muscle face that connects more even, avoid lightning impulse rising edge steepness in conductor propagation, produce the degree of kelvin effect, reduce the dispersiveness of flashover voltage, improve dielectric strength.
Accompanying drawing explanation
Fig. 1 is the embodiment of the present invention one lightning protection device structure chart;
Fig. 2 is the embodiment of the present invention one lightning protection device partial enlarged drawing;
Fig. 3 is the embodiment of the present invention one lightning protection device cross-sectional view;
Fig. 4 is the structure chart of electrode in the embodiment of the present invention one;
Fig. 5 is the structure chart of electrode in the embodiment of the present invention two;
Fig. 6 is that the A of Fig. 5 is to cutaway view;
Fig. 7 is the end view of Fig. 5.
Description of reference numerals:
1, shell, 11, arc control device, 12, arc blow-out passage, 111, increase and climb groove, 2, electrode, 211, first connects sudden strain of a muscle face, and 212, second connects sudden strain of a muscle face, and 22, connecting portion, 221, buffer groove.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment one
As shown in Figures 1 to 3, in the present embodiment, lightning protection device comprises shell 1 and the electrode 2 of insulation fluosilicic colloid, insulation crust 1 is shaft-like, there are arc control device 11 and electrode 2 Room, arc control device 11 and electrode 2 Room are interspersed at the inner axial straight line of shell 1, and arc control device 11 are communicated with adjacent two electrode 2 Room, and electrode 2 Room is communicated with adjacent two arc control device 11.
Have some electrodes 2, electrode 2 two ends are two connect sudden strain of a muscle face, connect striking arc during for being struck by lightning.It is indoor that electrode 2 is placed in electrode 2, and the sudden strain of a muscle face that connects is exposed in the arc control device 11 adjacent with this electrode 2 Room respectively, makes two adjacent arc control device 11 electric connections.
Interior two of exposing of same arc control device 11 connect between sudden strain of a muscle face and leave flashover gap, clearance distance 0.3mm to 1.5mm.
Arc control device 11 have arc blow-out passage 12 to be connected with the external world, and arc blow-out passage 12 is cylindrical hole, and arc blow-out passage 12 diameter is less than arc control device 11 diameter, is greater than flashover clearance distance, preferably, and arc blow-out passage 12 diameter value 2mm to 4mm.
Arc control device 11 are spherical, and the sudden strain of a muscle face that connects of electrode 2 is hemisphere, and the position of arc control device 11 inwall symmetry is located in the sudden strain of a muscle face that connects, and the minimum range in flashover gap is in the junction of arc control device 11 with arc blow-out passage 12.
The hemispheric diameter D in the sudden strain of a muscle face of connecing and flashover gap d meet: D is more than or equal to d/2.
Arc control device 11 inwall also has increasing to climb groove 111, for extending the creepage distance between two adjacent electrodes 2, increase climb groove 111 around minimum flashover gap, extend to arc blow-out passage 12 after extend at arc blow-out passage 12 inwall, increase and climb groove 111 place plane and electrode 2 axes normal, width 0.5mm to 1mm, degree of depth 1mm to 2mm.
As shown in Figure 4, electrode 2 comprises connecting portion 22, first and connects and dodge head, second and connect sudden strain of a muscle head, connecting portion 22 one end connect first connect dodge head, the other end connects and second connects sudden strain of a muscle head, first connects and dodges head and have first to connect sudden strain of a muscle face 211, the second to connect and dodge head and have second to connect sudden strain of a muscle face 212.
First connects sudden strain of a muscle head, second connects the entirety of dodging head, connecting portion 22 composition, and integral surface has anti-loosening convex-concave structure.First connects sudden strain of a muscle head, second connects sudden strain of a muscle head expansion projection, connecting portion 22 cross section is less than first and connects and dodge head maximum cross-section, be less than described second and connect and dodge head maximum cross-section, and first connects and dodge head, second to connect the cross section dodging head and connecting portion 22 entirety be the umbilicate structures of two ends projection.
First connects and dodges head, second and connect that to dodge head be hemisphere, and the hemisphere face on it is respectively first and connects sudden strain of a muscle face 211, second and connect sudden strain of a muscle face 212 for hemisphere face, first connects sudden strain of a muscle face 211, described second surface smoothness connecing sudden strain of a muscle face 212 reaches or higher than minute surface 14C level.
Connecting portion 22 is four sides cylinder, and cylinder both ends of the surface connect with first respectively dodges head, second and connect and dodges head and be connected, and four sides are divided into two groups between two relatively, and wherein one group is the face of cylinder with the hemisphere rounding off at two ends, another organize be for plane.
Follow in maximum principles of energy lower volume merit such as electric arc calcination releases, according to temperature rise and energy relationship equation:
Q＝c*m*△T；
Wherein, Q is the energy of heated air, and c is that the specific heats of gases are held, and m is gaseous mass, and △ T is gas temperature rise.
△ T=Q/cm is drawn by above formula;
Establishing criteria gas state equation:
P*V＝n*R*T；
Wherein T is temperature; R is gas constant; P is pressure; N is molal quantity; V is arc control device volume.
The product constant of P*V in expansion process after GAS ABSORPTION energy, and because arc blow-out passage is in communication with the outside, namely interrupter pressure tends to external atmosphere pressure all the time, and the maximum variable quantity △ T calculating T can converse corresponding V value, makes volume-variation △ V maximum.
With standard 8/20 lightning current waveform double-exponential function i (the t)=I of amplitude 5kA in design
0k (e-α t-e-β t) calculates, if load is pure resistance R, draws thunder energy Q function Q=∫ R|i (t) by integration |
2dt, substitutes into the function that formula △ T=Q/cm obtains △ T, obtains the maximum △ T of △ T by Q
max, thus try to achieve best volume design parameter.
Carry out according to the following steps when calculating the volume of lightning protection device arc control device:
A. get to bear needed for lightning protection device the lightning current of thunderbolt and relation function i (t) of time for amplitude be standard 8/20 lightning current waveform double-exponential function i (the t)=I of 5kA
0k (e
-α t-e
-β t), wherein, I
0for lightning current peak value, α, β are respectively the relevant constant coefficient that to decline to lightning current rising edge, lightning current.
B. i (t) integration is obtained the relation function Q of thunder energy and time t;
C. Q is brought in gas temperature rise equation Q=c* ρ * V* △ T into the function f (△ T) obtained about △ T, obtain the maximum △ T of △ T according to f (△ T)
maxexpression formula; Wherein, the specific heat capacity of c gas contained by arc control device, ρ is gas density quality contained by arc control device, and V is arc control device volume;
D. by △ T
maxexpression formula and equation V=c*T/P simultaneous, try to achieve the value of arc control device volume V; Wherein, P is lightning-arrest region ambient atmosphere pressure.
Embodiment two
Embodiment two is with the difference of embodiment one:
As shown in Figs. 5 to 7, buffer groove 221 on the face of cylinder of connecting portion 22.
Each technical characteristic of the above embodiment can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics does not exist contradiction, be all considered to be the scope that this specification is recorded.
The above embodiment only have expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but can not therefore be construed as limiting the scope of the patent.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (9)
1. a lightning protection device, is characterized in that, comprising:
Shell, has arc control device and at least two electrode chambers in it;
Wherein, arc control device and electrode chamber are staggered successively, and arc control device have two openings to be communicated with adjacent two electrode chambers respectively, and arc control device inner wall surface is round and smooth, has arc blow-out passage to be in communication with the outside by arc control device.
2. a lightning protection device, is characterized in that, comprising:
Shell, have arc control device and at least two electrode chambers in it, arc control device inner wall surface is round and smooth, and arc control device and electrode chamber are staggered, and arc control device have two openings to be communicated with adjacent two electrode chambers respectively, have arc blow-out passage to be in communication with the outside by arc control device;
Electrode, two ends respectively have one to connect sudden strain of a muscle face, and electrode is placed in electrode chamber, and the sudden strain of a muscle face that connects at electrode two ends is exposed in the arc control device of electrode chamber both sides, by both sides arc control device electric connection simultaneously, and two in arc control device connect between sudden strain of a muscle face and leave flashover gap.
3. lightning protection device according to claim 2, is characterized in that, described arc control device are spherical.
4. lightning protection device according to claim 2, it is characterized in that, the volume V of described arc control device is determined by the air pressure of the lightning current characteristic of being struck by lightning, ambient atmosphere, density and specific heat capacity, meet in a lightning stroke process, under the air pressure of the ambient atmosphere of specifying, density and specific heat capacity, the gas-heated of arc control device is obtained maximum swelling merit by lightning current.
5. lightning protection device according to claim 2, is characterized in that, described arc control device inwall has the increasing increasing creepage distance to climb groove, and described increasing climbs grooved ring around flashover gap.
6. lightning protection device according to claim 5, is characterized in that, described increasing is climbed groove and extended to described arc blow-out passage and extend in described arc blow-out passage.
7. lightning protection device according to claim 2, is characterized in that, described in connect sudden strain of a muscle face be hemisphere.
8. lightning protection device according to claim 7, is characterized in that, described in connect the hemispheric diameter D in sudden strain of a muscle face and flashover gap d and meet: D is more than or equal to d/2.
9. according to described arbitrary lightning protection device of claim 1 to 8, it is characterized in that, the width of described arc blow-out passage is greater than the minimum range in described flashover gap, is less than the Breadth Maximum of described arc control device cross section.
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| CN201410659971.7A CN104332827B (en) | 2014-11-18 | 2014-11-18 | Lightning protection device |
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| CN201410659971.7A CN104332827B (en) | 2014-11-18 | 2014-11-18 | Lightning protection device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108063366A (en) * | 2017-12-07 | 2018-05-22 | 武汉水院电气有限责任公司 | A kind of multi-chamber clearance lightning-proof device arc blow-out structure |
| CN108092134A (en) * | 2018-01-15 | 2018-05-29 | 王雅娟 | A kind of partition ball disturbance formula multi-chamber arc extinguishing lightning protection device |
| CN109087760A (en) * | 2018-08-28 | 2018-12-25 | 泉州亿兴电力有限公司 | A kind of clearance lightning-proof device with full skirt |
| CN109217110A (en) * | 2018-09-30 | 2019-01-15 | 武汉微创元电子科技有限责任公司 | Double hemisphere T-type ceramic discharge tubes |
| CN109273987A (en) * | 2018-09-30 | 2019-01-25 | 武汉微创元电子科技有限责任公司 | Stick Multiple level arc extinguishing lightning protection device based on double hemisphere T-type ceramic discharge tubes |
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| CN103138253A (en) * | 2012-04-16 | 2013-06-05 | 龚迪阳 | Thunder-lightening inducing arc extinction belt |
| CN103812007A (en) * | 2014-01-24 | 2014-05-21 | 广州供电局有限公司 | Band gap puffer type medium voltage lightning arrester for overhead distribution line |
| CN204216402U (en) * | 2014-11-18 | 2015-03-18 | 广东电网有限责任公司佛山供电局 | Lightning protection device |
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| CN103138253A (en) * | 2012-04-16 | 2013-06-05 | 龚迪阳 | Thunder-lightening inducing arc extinction belt |
| CN103812007A (en) * | 2014-01-24 | 2014-05-21 | 广州供电局有限公司 | Band gap puffer type medium voltage lightning arrester for overhead distribution line |
| CN204216402U (en) * | 2014-11-18 | 2015-03-18 | 广东电网有限责任公司佛山供电局 | Lightning protection device |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108063366A (en) * | 2017-12-07 | 2018-05-22 | 武汉水院电气有限责任公司 | A kind of multi-chamber clearance lightning-proof device arc blow-out structure |
| CN108063366B (en) * | 2017-12-07 | 2023-04-21 | 武汉水院电气有限责任公司 | Multi-chamber clearance lightning protection device blows arc structure |
| CN108092134A (en) * | 2018-01-15 | 2018-05-29 | 王雅娟 | A kind of partition ball disturbance formula multi-chamber arc extinguishing lightning protection device |
| CN108092134B (en) * | 2018-01-15 | 2023-03-31 | 广西序能电气设备有限公司 | Partition ball disturbance type multi-cavity arc extinguishing lightning protection device |
| CN109087760A (en) * | 2018-08-28 | 2018-12-25 | 泉州亿兴电力有限公司 | A kind of clearance lightning-proof device with full skirt |
| CN109217110A (en) * | 2018-09-30 | 2019-01-15 | 武汉微创元电子科技有限责任公司 | Double hemisphere T-type ceramic discharge tubes |
| CN109273987A (en) * | 2018-09-30 | 2019-01-25 | 武汉微创元电子科技有限责任公司 | Stick Multiple level arc extinguishing lightning protection device based on double hemisphere T-type ceramic discharge tubes |
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Effective date of registration: 20210219 Address after: Room 501-503, annex building, Huaye building, No.1-3 Chuimao new street, Xihua Road, Yuexiu District, Guangzhou City, Guangdong Province 510000 Patentee after: China Southern Power Grid Power Technology Co.,Ltd. Address before: 528000 No. 1 South Fenjiang Road, Chancheng District, Guangdong, Foshan Patentee before: FOSHAN POWER SUPPLY BUREAU, GUANGDONG POWER GRID Corp. |