CN204304426U - Anti-counterattack thunder device - Google Patents
Anti-counterattack thunder device Download PDFInfo
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- CN204304426U CN204304426U CN201420760145.7U CN201420760145U CN204304426U CN 204304426 U CN204304426 U CN 204304426U CN 201420760145 U CN201420760145 U CN 201420760145U CN 204304426 U CN204304426 U CN 204304426U
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- lightning
- thunder
- counterattack
- shaft tower
- counterattack thunder
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- 230000000694 effects Effects 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000012212 insulator Substances 0.000 description 10
- 238000009413 insulation Methods 0.000 description 4
- 239000004020 conductor Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000010891 electric arc Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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Abstract
The utility model relates to a kind of anti-counterattack thunder device, it is characterized in that comprising the anti-counterattack thunder and lightning sense be arranged between shaft tower and arrester, the anti-counterattack thunder and lightning of connecting with the sense of anti-counterattack thunder and lightning hinders, and hinders anti-counterattack thunder discharging gap in parallel with the sense of described anti-counterattack thunder and lightning and anti-counterattack thunder and lightning.The beneficial effect that the utility model has: be arranged between shaft tower and arrester, changing a former thunder and lightning current by pass is two thunder and lightning current by pass, the current amplitude flowing through shaft tower installed anti-counterattack thunder device under identical thunderbolt condition after diminishes, there is counterattack thunder required voltage higher, and then reach the anti-lightning strike effect of raising.
Description
Technical field
The utility model relates to a kind of anti-counterattack thunder device.
Background technology
For the mountain area of High aititude, edaphic condition is poor, and mainly based on coarse sand grains, soil resistivity is comparatively large, and this is just brought very large difficulty by the anti-lightning strike work of the transmission line of tower erection in mountain area.The main way of currently used counnter attack thunderbolt is for reducing earth resistance, but the way of reduction earth resistance is to the poor effect reducing mountain area earth resistance, and alpine region difficulty of construction is large, and circuit cost height is obviously unreasonable.When thunderbolt overhead line structures or lightning conducter, lightning current makes this above earth potential greatly raise by lightning strike spot impedance, when the potential difference between lightning strike spot and wire exceedes line insulation impulse sparkover voltage, and can to wire generation flashover, make wire occur overvoltage, be called counterattack.Currently used lightning arrester mainly plays shunting action, and when thunderbolt shaft tower or wire, the overcurrent that shaft tower or wire produce will leak into the earth along lightning arrester, guardwire or insulator be not struck by lightning the overcurrent that produces burn.
Summary of the invention
The purpose of this utility model is the problems referred to above that solution prior art exists and provides a kind of anti-counterattack thunder device, be arranged between shaft tower and arrester, changing a former thunder and lightning current by pass is two thunder and lightning current by pass, the current amplitude flowing through shaft tower installed anti-counterattack thunder device under identical thunderbolt condition after diminishes, there is counterattack thunder required voltage higher, and then reach the anti-lightning strike effect of raising.
Above-mentioned technical purpose of the present utility model mainly solves by the following technical programs: anti-counterattack thunder device, it is characterized in that comprising the anti-counterattack thunder and lightning sense be arranged between shaft tower and arrester, the anti-counterattack thunder and lightning of connecting with the sense of anti-counterattack thunder and lightning hinders, and hinders anti-counterattack thunder discharging gap in parallel with the sense of described anti-counterattack thunder and lightning and anti-counterattack thunder and lightning.Anti-counterattack thunder device (English is Apparatus of Pre Counterattack Thunder, referred to as ACT) is arranged between shaft tower and arrester, makes an original thunder and lightning current by pass become two thunder and lightning current by pass.And then reduce the current amplitude that flows through shaft tower and improve counterattack thunder required voltage occurs, thus reach and improve anti-lightning strike effect.
As improving further and supplementing technique scheme, the utility model adopts following technical measures: described arrester, the sense of anti-counterattack thunder and lightning, the resistance of anti-counterattack thunder and lightning, shaft tower inductance and shaft tower resistance form Article 1 lightning current current by pass, and described arrester, anti-counterattack thunder discharging gap, shaft tower inductance and shaft tower resistance form Article 2 lightning current current by pass.
Described shaft tower grounding through resistance.
The beneficial effect that the utility model has: be arranged between shaft tower and arrester, changing a former thunder and lightning current by pass is two thunder and lightning current by pass, the current amplitude flowing through shaft tower installed anti-counterattack thunder device under identical thunderbolt condition after diminishes, there is counterattack thunder required voltage higher, and then reach the anti-lightning strike effect of raising.
Accompanying drawing explanation
Fig. 1 is one thunderbolt shaft tower earial drainage schematic diagram of the present utility model.
Fig. 2 is a kind of shaft tower equivalent circuit schematic diagram not installing anti-counterattack thunder device.
Fig. 3 is a kind of shaft tower equivalent circuit schematic diagram installing anti-counterattack thunder device.
Fig. 4 installs the current vs that anti-counterattack thunder device and the thunderbolt shaft tower not installing anti-counterattack thunder device flow through shaft tower to scheme.
Fig. 5 installs anti-counterattack thunder device and the counterattack thunder generation voltage-contrast figure not installing anti-counterattack thunder device.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment: anti-counterattack thunder device, as shown in Figure 1, comprise the anti-counterattack thunder and lightning sense 4 be arranged between shaft tower and arrester, the anti-counterattack thunder and lightning of connecting with anti-counterattack thunder and lightning sense 4 hinders 6, hinders 6 anti-counterattack thunder discharging gaps 5 in parallel with described anti-counterattack thunder and lightning sense 4 and anti-counterattack thunder and lightning.
Described arrester 3, anti-counterattack thunder and lightning sense 4, anti-counterattack thunder and lightning resistance 6, shaft tower inductance 7 and shaft tower resistance 8 form Article 1 lightning current current by pass 1, and described arrester 3, anti-counterattack thunder discharging gap 5, shaft tower inductance 7 and shaft tower resistance 8 form Article 2 lightning current current by pass 2.
Described shaft tower resistance 8 receives ground 9.
1,2-lightning current current by pass, 3-arrester, the inductance L of 4-ACT
f, the discharging gap of 5-ACT, the resistance R of 6-ACT
f, the inductance L of 7-shaft tower
gt, the resistance R of 8-shaft tower
oh, 9-the earth
ACT has two current by pass, and during thunderbolt arrester, lightning current is to L
fcharging, L
fwhen voltage reaches the puncture voltage of discharging gap, discharging gap conducting, lightning current leaks into the earth, through L along passage 1
felectric current along passage 2 flow into the earth.
1.1ACT makes the amplitude of lightning current flowing through shaft tower reduce
When thunderbolt overhead line structures or lightning conducter, lightning current makes this above earth potential greatly raise by lightning strike spot impedance, when the potential difference between lightning strike spot and wire exceedes line insulation impulse sparkover voltage, and can to wire generation flashover, make wire occur overvoltage, be called counterattack.Currently used lightning arrester mainly plays shunting action, and when thunderbolt shaft tower or wire, the overcurrent that shaft tower or wire produce will leak into the earth along lightning arrester, guardwire or insulator be not struck by lightning the overcurrent that produces burn.The ACT operation principle studied herein is that ACT is by lightning current I when thunderbolt arrester
ldbecome and flow through L
felectric current jI
lfwith the electric current I flowing through passage 1
t, the lightning current flowing through shaft tower through ACT can be expressed as:
Will
get amplitude and I
ldrelatively can obtain
Reduced by the known amplitude of lightning current flowing through shaft tower of formula (1-2).
The Mathematical Modeling that 1.2 shaft tower counterattack thunders occur
As tower top current potential U
tdbe equal to or greater than the U of insulator string
50%time, will be hit back to this phase conductor by tower top, line tripping [2-3] may be caused.
ACT-anti-counterattack thunder device, I
lf-flow through the current value of ACT inductance, U
50%50% impulse sparkover voltage value when-insulator string wire lower end is positive pole, h
dp-wire average height,
-unlikely maximum the lightning current causing insulation flashover that tolerates when being struck by lightning, U
td-tower top voltage, C
jelectric capacity between-insulator and shaft tower, I
sL-flashover current, U
fvoltage when-counterattack thunder occurs
Flow through the amplitude of lightning current reduction of shaft tower through ACT shown in formula (1-3),
probability reduce.
There is counterattack thunder probability and reduce in 1.3 wires
During thunderbolt shaft tower, lightning conducter has tower top current potential U
td, due to the coupled voltages KU that coupled relation wire produces
td.Therefore, the potential difference on lightning conducter and wire is:
Meanwhile, when lightning conducter is struck by lightning, the induced voltage that wire produces is:
Utilize principle of stacking, the voltage max that wire insulation substring produces is:
Work as U
jbe more than or equal to 50% impulse sparkover voltage U of insulator string
50%time, wire is strikeed back, and forms the short circuit between wire and earth electrode (shaft tower or lightning conducter), causes line tripping.The lightning withstand level of circuit is:
As thunderbolt ACT, now line lightning resisting level formula becomes:
Thunderbolt condition is identical, and the amplitude of lightning current flowing through shaft tower through ACT diminishes
potential difference between wire and earth electrode diminishes,
the access of ACT, makes wire occur to reduce against the probability of flashover.
1.4ACT arc quenching principle
When shaft tower and wire or insulator generation flashover, the electric current produced is capacity current, when capacity current reaches certain value, by causing, insulator bursts, wire is burnt, power equipment damages, the generation of electric power system trip accident, affect the safe and stable operation of electric power system, flashover current can be expressed as:
The access of ACT will effectively suppress the generation of electric arc, after ACT provides inductance current, and flashover current amplitude:
time, do not produce electric arc when thunderbolt insulator or wire,
time, arc current
amplitude reduce, Bu Huiyin
excessive and insulator of burning, wire.
2, simulating, verifying
Inverse flashover is also in counterattack, and the main cause that counterattack thunder occurs is that the impulse earthed resistance of shaft tower is excessive, will raise tower top current potential U
tdvalue, then counterattack just easily occurs.For the validity of ACT, carry out anti-counterattack thunder test:
Fig. 2 is by 3-arrester, 7-shaft tower inductance L
gt, 8-shaft tower resistance R
oh, the protected metallic conductor of 11-, 12-play the earth electrode composition of fixed heel earial drainage effect.Fig. 3 is by 1-arrester, 2-inductance L
f, 3-resistance R
f4-discharging gap, 5-inductance L
gt, 6-shaft tower resistance R
oh, the protected metallic conductor of 7-, 8--play the earth electrode composition of fixed heel earial drainage effect.Respectively simulation lightning test is carried out to the device of Fig. 2 and Fig. 3.To the electric current I flowing through shaft tower
ldwith tower top current potential U during generation flashover
tdcarry out contrast simulation result as shown in Figure 4, the current amplitude flowing through shaft tower after installing ACT as shown in Figure 4 under identical thunderbolt condition diminishes, and the earial drainage time is elongated.As shown in Figure 5, at metal object with shaft tower equivalent impedance apart under identical condition, it is high to there is counterattack thunder required voltage than shaft tower in the shaft tower installing ACT.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model.In the above-described embodiments, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection range of the present utility model.
Claims (3)
1. anti-counterattack thunder device, it is characterized in that comprising the anti-counterattack thunder and lightning sense (4) be arranged between shaft tower and arrester, the anti-counterattack thunder and lightning of connecting with anti-counterattack thunder and lightning sense (4) hinders (6), hinders (6) anti-counterattack thunder discharging gap (5) in parallel with described anti-counterattack thunder and lightning sense (4) and anti-counterattack thunder and lightning.
2. anti-counterattack thunder device according to claim 1, it is characterized in that described arrester (3), anti-counterattack thunder and lightning sense (4), anti-counterattack thunder and lightning resistance (6), shaft tower inductance (7) and shaft tower resistance (8) form Article 1 lightning current current by pass (1), described arrester (3), anti-counterattack thunder discharging gap (5), shaft tower inductance (7) and shaft tower resistance (8) form Article 2 lightning current current by pass (2).
3. anti-counterattack thunder device according to claim 1 and 2, is characterized in that described shaft tower resistance (8) ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420760145.7U CN204304426U (en) | 2014-12-04 | 2014-12-04 | Anti-counterattack thunder device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420760145.7U CN204304426U (en) | 2014-12-04 | 2014-12-04 | Anti-counterattack thunder device |
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| Publication Number | Publication Date |
|---|---|
| CN204304426U true CN204304426U (en) | 2015-04-29 |
Family
ID=53109940
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420760145.7U Active CN204304426U (en) | 2014-12-04 | 2014-12-04 | Anti-counterattack thunder device |
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| CN (1) | CN204304426U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104659776A (en) * | 2014-12-04 | 2015-05-27 | 国家电网公司 | Lightning counterattack protection device |
| CN111342417A (en) * | 2020-04-26 | 2020-06-26 | 云南电网有限责任公司西双版纳供电局 | Lightning protection counterattack device for power transmission line |
-
2014
- 2014-12-04 CN CN201420760145.7U patent/CN204304426U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104659776A (en) * | 2014-12-04 | 2015-05-27 | 国家电网公司 | Lightning counterattack protection device |
| CN111342417A (en) * | 2020-04-26 | 2020-06-26 | 云南电网有限责任公司西双版纳供电局 | Lightning protection counterattack device for power transmission line |
| CN111342417B (en) * | 2020-04-26 | 2021-05-04 | 云南电网有限责任公司西双版纳供电局 | Lightning protection counterattack device for power transmission line |
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