CN205376792U - Low impedance high voltage transmission lines lightning protection system - Google Patents
Low impedance high voltage transmission lines lightning protection system Download PDFInfo
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- CN205376792U CN205376792U CN201620097791.9U CN201620097791U CN205376792U CN 205376792 U CN205376792 U CN 205376792U CN 201620097791 U CN201620097791 U CN 201620097791U CN 205376792 U CN205376792 U CN 205376792U
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- downlead
- lightning
- high voltage
- transmission line
- protection system
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- 230000000630 rising effect Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 230000009466 transformation Effects 0.000 abstract 1
- 230000001052 transient effect Effects 0.000 abstract 1
- 230000005611 electricity Effects 0.000 description 11
- 239000002689 soil Substances 0.000 description 3
- 230000001131 transforming effect Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
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- 235000009566 rice Nutrition 0.000 description 1
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Abstract
The utility model provides a low impedance high voltage transmission lines lightning protection system, the utility model belongs to the technical field of high voltage transmission lines lightning grounding, overhead transmission line A among the prior art is solved to the purpose, B, downlead of the triphase arrester of C sharing, suffer the thunderbolt when the circuit, the lightning current passes through the arrester when ground is gone into to the downlead, arouse earth potential rise, the unable release in time of lightning current, it invades in the station to make the lightning wave follow transmission line, cause the rapid rising of high -voltage power transmission and transformation transient state current potential, arouse the technical problem of tripping operation, it includes arrester and downlead, wherein: it still includes low -impedance absorption formula earthing device, the absorption formula earthing device establish underground, and the arrester on each circuit of high voltage transmission lines all is connected through downlead and the first electrode that absorbs formula earthing device alone. Utility model can make lightning current and distant place zero potential point's potential difference form capacitance effect, reduces the impedance of lightning current release, guarantees the lightning current and goes into ground, reduction transmission line's thunderbolt pressure smoothly.
Description
Technical field
This utility model belongs to high-tension line Lightning protection field, is specifically related to a kind of low impedance, high voltage circuit lightning protection system.
Background technology
Transmission line of electricity is the important component part of power transmission system, transmission line of electricity mostly have the area of sudden change for the soil resistivity such as wilderness, hills, high mountain through part, soil property fault zone, the junctional area in rock and mixing with soil area, hillside and rice field, the area of the circumstance complication such as air port, mountain top, reservoir river, area, mining area.Owing to transmission line of electricity is long, the probability that same circuit many places meet with thunderbolt is relatively big, is damage to crops caused by thunder severely afflicated area.
In transmission line of electricity lightning protection, overhead transmission line A, B, C three-phase respectively installs a spark gap, and lightning current enters ground by spark gap through downlead.In prior art, the spark gap of overhead transmission line A, B, C three-phase, share a downlead or utilize steel tower to do downlead, when circuit is struck by lightning, lightning current when downlead or steel tower enter ground, causes earth potential to raise by spark gap, lightning current cannot discharge in time, make lightning wave invade in station along transmission line of electricity, cause the sharply rising of high voltage power transmission and transforming system transients current potential, cause tripping operation.
Summary of the invention
The purpose of this utility model is to solve the spark gap of overhead transmission line A, B, C three-phase in prior art to share a downlead, when circuit is struck by lightning, lightning current by spark gap through downlead enter ground time, earth potential is caused to raise, lightning current cannot discharge in time, makes lightning wave invade in station along transmission line of electricity, causes the sharply rising of high voltage power transmission and transforming system transients current potential, cause the technical problem of tripping operation, it is provided that a kind of low impedance, high voltage circuit lightning protection system.
For solving above-mentioned technical problem, the technical solution adopted in the utility model is:
A kind of low impedance, high voltage circuit lightning protection system, it includes spark gap and downlead, wherein: it also includes low-impedance absorption grounding device, described absorption grounding device is located in the ground, and the spark gap on each circuit of high-tension line is all connected with the first electrode of absorption grounding device separately through downlead.
Described absorption grounding device includes two electrodes, and the second electrode is located at below the first electrode.
Described low impedance, high voltage circuit lightning protection system, also includes electrical apparatus release, and spark gap is connected with downlead by electrical apparatus release.
Described downlead is shielded lead.
Owing to this utility model have employed technique scheme, solve overhead transmission line A in prior art, B, the spark gap of C three-phase shares what a downlead existed, when circuit is struck by lightning, lightning current by spark gap through downlead enter ground time, earth potential is caused to raise, lightning current cannot discharge in time, lightning wave is made to invade in station along transmission line of electricity, cause the sharply rising of high voltage power transmission and transforming system transients current potential, cause the technical problem of tripping operation, compared with background technology, this utility model have employed a kind of absorption grounding device, it enables to the potential difference formation capacity effect of lightning current and zero-potential point at a distance, reduce the impedance of lightning current release, ensure that lightning current enters ground smoothly, reduce the thunderbolt pressure of transmission line of electricity.Therefore, this utility model has the impedance that can fully reduce Lightning-Protected Grounding of Transmission Line system, and effectively reduce the alternating electromagnetic field caused by the thunderbolt impact on lightning protection earthing system and transmission line of electricity, ensure that lightning current discharges smoothly, ensure the safety and stability of transmission line of electricity, the advantage reducing the tripping operation probability of transmission line of electricity.
Accompanying drawing explanation
Fig. 1 is overhead transmission line lightning protection system structural representation in prior art；
Fig. 2 is structural representation of the present utility model；
In figure: 1 spark gap, 2 downleads, 3 absorption grounding device, 4 electrical apparatus releases.
Detailed description of the invention
Below in conjunction with drawings and Examples, this utility model is elaborated:
As shown in Figure 2, low impedance, high voltage circuit lightning protection system in the present embodiment, it includes spark gap 1 and downlead 2, wherein: it also includes low-impedance absorption grounding device 3, described absorption grounding device 3 is located in the ground, and all the first electrodes separately through downlead 2 with absorption grounding device 3 of the spark gap 1 on each circuit of high-tension line are connected.Described downlead 2 is shielded lead.Described absorption grounding device 3 includes two electrodes, and the second electrode is located at below the first electrode.
The second electrode that absorption grounding device 3 in the present embodiment is not limited only in the present embodiment is located at the situation immediately below the first electrode, second electrode can also be located at the first electrode same position vertically or below tilting, it also is able to have below certain level distance, but the buried depth buried depth more than the first electrode of the second electrode must be made.
Low impedance, high voltage circuit lightning protection system in the present embodiment can also include electrical apparatus release 4, and spark gap 1 is connected with downlead 2 by electrical apparatus release 4.Electrical apparatus release 4 can disconnect lightning-arrest path when spark gap 1 is damaged short circuit, it is ensured that the normal operation of high-tension line system.
Claims (4)
1. a low impedance, high voltage circuit lightning protection system, it includes spark gap (1) and downlead (2), it is characterized in that: it also includes low-impedance absorption grounding device (3), described absorption grounding device (3) is located in the ground, and all the first electrodes separately through downlead (2) with absorption grounding device (3) of the spark gap (1) on each circuit of high-tension line are connected.
2. low impedance, high voltage circuit lightning protection system according to claim 1, it is characterised in that: described absorption grounding device (3) includes two electrodes, and the second electrode is located at below the first electrode.
3. low impedance, high voltage circuit lightning protection system according to claim 1, it is characterised in that: it also includes electrical apparatus release (4), and spark gap (1) is connected with downlead (2) by electrical apparatus release (4).
4. the low impedance, high voltage circuit lightning protection system according to claim 1,2 or 3, it is characterised in that: described downlead (2) is shielded lead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620097791.9U CN205376792U (en) | 2016-01-28 | 2016-01-28 | Low impedance high voltage transmission lines lightning protection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620097791.9U CN205376792U (en) | 2016-01-28 | 2016-01-28 | Low impedance high voltage transmission lines lightning protection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205376792U true CN205376792U (en) | 2016-07-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620097791.9U Active CN205376792U (en) | 2016-01-28 | 2016-01-28 | Low impedance high voltage transmission lines lightning protection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205376792U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105552593A (en) * | 2016-01-28 | 2016-05-04 | 国网山西省电力公司临汾供电公司 | Low-impedance lightning protection system of high-voltage circuit |
-
2016
- 2016-01-28 CN CN201620097791.9U patent/CN205376792U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105552593A (en) * | 2016-01-28 | 2016-05-04 | 国网山西省电力公司临汾供电公司 | Low-impedance lightning protection system of high-voltage circuit |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |