CN203800381U - Controllable discharging lightning rod for overhead transmission line - Google Patents
Controllable discharging lightning rod for overhead transmission line Download PDFInfo
- Publication number
- CN203800381U CN203800381U CN201420164816.3U CN201420164816U CN203800381U CN 203800381 U CN203800381 U CN 203800381U CN 201420164816 U CN201420164816 U CN 201420164816U CN 203800381 U CN203800381 U CN 203800381U
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- Prior art keywords
- lightning rod
- lightning
- transmission line
- dynamic ring
- energy storage
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Abstract
The utility model relates to a controllable discharging lightning rod for an overhead transmission line. The controllable discharging lightning rod comprises a main rod and a dynamic ring; the main rod is installed in an intermediate sleeve of the dynamic ring; a plurality of fixed supports are connected to the dynamic ring along the circumference and are sleeved at the dynamic ring by hoops. An energy storage element is connected below the sleeve; the main rod penetrates the sleeve and the energy storage element; and the energy storage element separates the upper portion and the lower portion of the main rod, so that conduction is realized when the certain voltage is reached. According to the scheme, the lightning rod can be installed simply and conveniently. When the controllable discharging lightning rod is erected at the elevation angle of the transmission line, the thunder guiding capability of the iron tower can be obviously improved; the lightning with possibility of shielding failure can be intercepted in advance, wherein the lightning penetrates to the lower place. Therefore, the lightning strike probability cab be substantially reduced.
Description
Technical field
The utility model relates to lightning protection field, relates in particular to a kind of overhead transmission line controllable discharge lightning rod.
Background technology
Thunder discharge is thundercloud between the earth or thundercloud or the electric discharge phenomena of thundercloud inside, and on the earth, average every day, 8,000,000 thunderbolts approximately occurred.The shape of thunder discharge passage is mainly wire, sometimes can see in the clouds sheet thunder and lightning, in indivedual very rare situations, there will be spherical thunder and lightning.
At present, on overhead transmission line, conventionally need to adopt lightning measure, to protect the safety of transmission line.The most frequently used lightning protection method still adopts lightning rod (lightning conducter) substantially, its principle is: utilize oneself height that the electric field generation distortion under thundercloud is guided to lightning discharge on lightning rod, although this mode is simple, but there are many defects: 1, shielding occurs: a large amount of research and facts have proved, the risk of shielding failure of conventional lightning conductor is greatly about 1% left and right, and the danger that while using lightning rod as seen, protected object is struck by lightning is still very large; 2, there is counterattack to occur: can form high voltage if the impedance of earth resistance is too high, causing the counterattack to protection thing of lightning rod and downlead, easily there is insulation breakdown to the hypotelorism of lightning rod and downlead and damages in various power lines, telephone wire, broadcast wire, antenna; On the other hand, the ground net corrosion of some device lightning rod is serious, and its resistance is up to tens Europe, and this also can cause counterattack; 3, can cause induction overvoltage: powerful lightning current (tens of kilo-amperes～kilo-amperes up to a hundred) at a terrific speed (Microsecond grade) enter in the process in ground along lightning rod and downlead, can on protected object, form induction overvoltage and cause the accident, to overhead transmission line, beyond the 50m when thunderbolt, induction overvoltage generally can reach 250 ~ 500kV, even higher, this also can cause the tripping operation of part transmission line; 4, be not suitable for protecting weak current equipment.
Utility model content
The utility model, in order to overcome deficiency of the prior art, provides a kind of overhead transmission line controllable discharge lightning rod, and the utility model is to be achieved through the following technical solutions:
A kind of overhead transmission line controllable discharge lightning rod, comprise main pin, dynamic ring, described main pin is arranged in the intermediate sleeve of dynamic ring, described dynamic ring is along being circumferentially connected with several fixed supports, described fixed support is enclosed within on dynamic ring by cuff, is connected with energy storage unit below described sleeve.Separately, reaching certain voltage will conducting by part and lower part on main pin for energy storage unit.
As optimal technical scheme of the present utility model, described main pin runs through sleeve and energy storage unit.
As optimal technical scheme of the present utility model, described support bracket fastened quantity is three, is uniformly distributed circumferentially on dynamic ring.
As optimal technical scheme of the present utility model, this lightning rod is arranged on mounting bracket.Mounting bracket is mounted on steel tower top, and higher than overhead ground wire, each steel tower is installed two lightning rods.
Its operation principle is: in the time that near ground electric field intensity controllable discharge lightning rod installation place is lower (if thundercloud is from controllable discharge lightning rod and the situation such as protected object is distant), thundercloud can not discharge to ground object, now the energy storage device of controllable discharge lightning rod syringe needle is in storage thundercloud electric field energy operating mode, due to the effect of dynamic ring, syringe needle upper member (dynamic ring and main pin needle point) is in potential fluctuation state, little with ambient atmosphere potential difference, therefore there is hardly corona discharge, ensured near the little requirement of space charge syringe needle before initiation occurs.
When thundercloud electric field rise to indication it may occur controllable discharge lightning rod and the lightning of protected object generation around time; energy storage device proceeds to immediately releases energy operating mode; this transformation is no longer limited the electric field strength of main pin needle point by dynamic ring; needle point electric field moment rises hundreds of times; near making needle point, air discharges rapidly; form very strong discharge pulse; because there is no the obstruction of space charge; this discharge pulse upwards develops into fast upward leader under thundercloud electric field action, goes to tackle thundercloud bottom guide or enters thundercloud charge center.Do not become upward leader if pulse for the first time causes, energy storage device enters again energy storage state, makes the space charge of pulse shaping for the first time be dissipated simultaneously, prepares pulse for the second time and produces.So circulation can successfully cause up thunder.
Compared with prior art, the beneficial effects of the utility model are: 1. controllable discharge lightning rod has a sizable protection zone that suffers hardly shielding; 2. this lightning rod reduces shielding and increases shielding angle by producing upwards electric discharge; 3. on average shift to an earlier date 10 μ s than common Franklin lightning rod the discharge time of this lightning rod; 4. in the time that electric field is lower, the corona current of controllable discharge lightning rod, almost in complete holddown; 5. be increased to can start controllable discharge lightning rod time at electric field, the pulsed corona discharge electric current that controllable discharge lightning rod produces, its corona current amplitude is large, but the mean value of corona current is little, and this is conducive to the conversion from corona to forerunner arc; 6. controllable discharge lightning rod has larger shielding angle; can reduce like this risk of shielding failure of transmission line; main discharge current amplitude due to controllable discharge lightning rod is little on the other hand, steepness is low; according to the designing requirement of transmission line lightning withstand level; the transmission line of 35kV-500kV is can tolerate this lightning discharge electric current completely and can not trip, and also can not cause large induction overvoltage.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is scheme of installation of the present utility model.
In figure: the main pin of 1-; 2-dynamic ring; 3-fixed support; 4-cuff; 5-energy storage unit; 6-mounting bracket; 20-sleeve.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
Refer to Fig. 1 and Fig. 2, Fig. 1 is structural representation of the present utility model, and Fig. 2 is scheme of installation of the present utility model.
Described a kind of overhead transmission line controllable discharge lightning rod, comprise main pin 1, dynamic ring 2, described main pin 1 is arranged in the intermediate sleeve 20 of dynamic ring 2, dynamic ring 2 is along being circumferentially evenly connected with three fixed supports 3, described fixed support 3 is enclosed within on dynamic ring 2 by cuff 4, is connected with energy storage unit 5 below sleeve 20, and described main pin 1 runs through sleeve 20 and energy storage unit 5, separately, reaching certain voltage will conducting by part and lower part on post pin 1 for energy storage unit 5.
This lightning rod is arranged on mounting bracket 6, and mounting bracket 6 is mounted on steel tower top, and controllable discharge lightning rod can stand on all kinds of buildings as autonomous system; during for the protection of transmission line; directly be contained in the elevation angle, head of mast, higher than overhead ground wire, each steel tower is installed two lightning rods.In the time setting up controllable discharge lightning rod on the transmission line elevation angle, can significantly improve the thunder ability of drawing of steel tower, can tackle in advance the lightning that infiltrates into lower and may occur shielding, thereby greatly reduce the probability of thunderbolt.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any amendments of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection range of the present utility model.
Claims (4)
1. an overhead transmission line controllable discharge lightning rod, comprise main pin (1), it is characterized in that: also comprise dynamic ring (2), described main pin (1) is arranged in the intermediate sleeve (20) of dynamic ring (2), described dynamic ring (2) is along being circumferentially connected with several fixed supports (3), it is upper that described fixed support (3) is enclosed within dynamic ring (2) by cuff (4), is connected with energy storage unit (5) in the below of described sleeve (20).
2. a kind of overhead transmission line controllable discharge lightning rod according to claim 1, is characterized in that: described main pin (1) runs through sleeve (20) and energy storage unit (5).
3. a kind of overhead transmission line controllable discharge lightning rod according to claim 1, is characterized in that: the quantity of described fixed support (3) is three, is uniformly distributed circumferentially on dynamic ring (2).
4. according to a kind of overhead transmission line controllable discharge lightning rod described in claim 1 or 3, it is characterized in that: this lightning rod is arranged on mounting bracket (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420164816.3U CN203800381U (en) | 2014-04-08 | 2014-04-08 | Controllable discharging lightning rod for overhead transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420164816.3U CN203800381U (en) | 2014-04-08 | 2014-04-08 | Controllable discharging lightning rod for overhead transmission line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203800381U true CN203800381U (en) | 2014-08-27 |
Family
ID=51382570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420164816.3U Expired - Fee Related CN203800381U (en) | 2014-04-08 | 2014-04-08 | Controllable discharging lightning rod for overhead transmission line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203800381U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107046232A (en) * | 2017-03-08 | 2017-08-15 | 宁波高新区远创科技有限公司 | A kind of ultra-high-tension power transmission line tower Special lightning-protection pin |
| CN109038455A (en) * | 2018-07-28 | 2018-12-18 | 中国电力工程顾问集团西北电力设计院有限公司 | A kind of Lightning-Rod Protection Disign In Substations vibration absorber |
-
2014
- 2014-04-08 CN CN201420164816.3U patent/CN203800381U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107046232A (en) * | 2017-03-08 | 2017-08-15 | 宁波高新区远创科技有限公司 | A kind of ultra-high-tension power transmission line tower Special lightning-protection pin |
| CN109038455A (en) * | 2018-07-28 | 2018-12-18 | 中国电力工程顾问集团西北电力设计院有限公司 | A kind of Lightning-Rod Protection Disign In Substations vibration absorber |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140827 Termination date: 20150408 |
|
| EXPY | Termination of patent right or utility model |