CN101277005A - Aerial insulated wire lightning protection device - Google Patents
Aerial insulated wire lightning protection device Download PDFInfo
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- CN101277005A CN101277005A CNA2008101006315A CN200810100631A CN101277005A CN 101277005 A CN101277005 A CN 101277005A CN A2008101006315 A CNA2008101006315 A CN A2008101006315A CN 200810100631 A CN200810100631 A CN 200810100631A CN 101277005 A CN101277005 A CN 101277005A
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- insulator
- limiting element
- current limiting
- drainage ring
- protection device
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Abstract
An overhead insulated wire lightning protection device is characterized in that an insulator on the insulated circuit is taken as a bracket. A drainage ring is provided at the lower part of the circulation circuit, at the middle part of the insulator and the central column of the insulator. The lower end of the insulator is fixedly provided with a connecting board through a bolt. A nonlinear current limiting element is connected in series between the drainage ring and the connecting board. The drainage ring, the nonlinear current limiting element and the insulated circuit form a series gap. The device of the invention can effectively switch off the industrial frequency afterflow caused by the current of thunder. The disconnection of the overhead insulated wire caused by lightning stroke is prevented, and the generation of the accident of wire disconnection caused by lightning stroke is settled from the root.
Description
Technical field
The present invention relates to a kind of lightning protection device, be specifically related to a kind of insulated overhead line overvoltage lightning protection device.
Background technology
A large amount of suspended insulated guide wire circuits that adopt have solved tree line contradiction and circuit corridor contradiction effectively in the 10kV distribution network.But the statistical magnitude of insulated circuit generation lightning-caused breaking and insulator breakdown accident is in rising trend in recent years, and sharply rises along with the increase of insulated conductor line length, has become the main root of serious threat line security operation.Present existing insulated overhead line overvoltage protection has zinc oxide arrester, overhead ground wire etc., but there are the following problems respectively:
1, the zinc oxide arrester protection range is little, increase protection range as need, must on every electric pole, install, increased cost of investment on the one hand, also need on original circuit, to install additional affiliated facilities such as cross-arm, difficulty of construction is big, and this mode has superiority for the protection of power consumption equipment class, but should not adopt on distribution line;
2, overhead ground wire can't adopt in the 10kV distribution network, and the setting up of lightning conducter must exceed original line levels and just can play lightning protection effect, highly is used to set up lightning conducter cost of investment is increased greatly but change the electric pole increase.
Summary of the invention
The present invention is for avoiding above-mentioned existing in prior technology weak point, a kind of reasonable in design, simple in structure, service-strong aerial insulated wire lightning protection device being provided.
Technical solution problem of the present invention adopts following technical scheme:
The design feature of aerial insulated wire lightning protection device of the present invention is to be support with the insulator on the insulated circuit, be positioned at the below of insulated circuit, at the middle part of insulator, be positioned at suit drainage ring on the insulator center pillar, lower end at insulator is provided with connecting plate by bolt, the non-linear current limiting element of connecting between drainage ring and connecting plate constitutes series gap by drainage ring, non-linear current limiting element and insulated circuit.
Design feature of the present invention also is:
Described non-linear current limiting element adopts the silicon rubber zinc oxide arrester.
The stainless steel assembly that described drainage ring is made up of two semicircles.
When suspended insulated guide wire meets the lightning current impact, the high voltage of lightning current at first punctures the series gap between lead and the drainage ring, guide lightning current into current limiting element, by it thunder and lightning residual voltage is limited on the overvoltage, and cut off the power frequency continued flow that lightning current causes, prevent that aerial insulated wire from suffering lightning-caused breaking, fundamentally solve the generation of lightning-caused breaking accident.
Compared with the prior art, beneficial effect of the present invention is embodied in:
1, the present invention can effectively cut off the power frequency continued flow that lightning current causes, prevents that aerial insulated wire from suffering lightning-caused breaking, has fundamentally solved the generation of lightning-caused breaking accident.
2, the present invention can move reliably and with long-term, has solved the danger of former lightning arrester overcoat blast, and its volume is little, in light weight, anticorrosive, manufacturing process is simple.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is a drainage ring structure schematic diagram of the present invention.
Fig. 3 is a current limiting element cross-sectional schematic among Fig. 1.
Number in the figure: 1 current limiting element, 2 drainage rings, 3 insulated circuits, 4 insulators, 5 connecting plates, 6 valve blocks, 7 insulating coatings.
Below, in conjunction with the accompanying drawings the present invention is further described by embodiment.
Embodiment
Referring to Fig. 1, with the insulator on the insulated circuit 4 is support, be positioned at the below of insulated circuit 3, at the middle part of insulator 4, be positioned at suit drainage ring 2 on the insulator center pillar, lower end at insulator 4 is provided with connecting plate 5 by bolt, the non-linear current limiting element 1 of connecting between drainage ring 2 and connecting plate 5 constitutes series gap by drainage ring 2, non-linear current limiting element 1 with insulated circuit 3.
Referring to Fig. 3, non-linear current limiting element 1 adopts the silicon rubber zinc oxide arrester, specifically is to be wrapped in resistor valve sheet 6 by composite silicone rubber insulating coating 7, and two ends connect stainless steel drainage ring 2 respectively and connecting plate 5 is formed.
Referring to Fig. 2, drainage ring 2 adopts the stainless steel assembly of being made up of two semicircles.This version does not need to remove the binding wire on the insulator when the drainage ring is installed, easy for installation.
Assembling process is as follows:
1, connecting plate 5 is enclosed within on the lower end bolt of line insulator 4, is fixed with the nut that is equipped with.
2, current limiting element 1 is installed in the other end of connecting plate 5, and tightens;
3, two semi-circular stainless steel drainage rings 2 are fixed on the top of current limiting element 1, and stainless steel drainage ring 2 is enclosed within on the insulator center pillar, finish installation.
The rated voltage of current limiting element:
Current limiting element is used to block power frequency continued flow, thereby must consider to flow through under power-frequency overvoltage the electric current of current limiting element.For the 10kV system, power-frequency overvoltage generally is no more than 1.1 √ 3p.u..The protector rated voltage that the 10kV system is used is decided to be 12.7kV, and current limiting element direct current 1mA reference voltage should be greater than 18kV.Under the effect of 13.2kV power-frequency overvoltage, if ignore the influence of series gap for power frequency continued flow, the power frequency continued flow that flows through lightning arrester in theory is 0.1A like this, and result of calculation shows that current limiting element can cut off power frequency continued flow fully well.Because series gap has good cutting action to little electric current, thereby flow through that the power frequency continued flow of current limiting element is inevitable to be lower than 0.1A greatly.
The estimation of current limiting element through-current capability:
Though induction lightening stream amplitude is 200kA, the lightning current that flows through protector is few, selects earth resistance 30 Ω by rules, uses EMTP transient state calculation procedure, and the analog computation result is that the amplitude of lightning current that flows through protector is no more than 16kA.Select the D3 valve block for use, it can bear the heavy current impact of 2 65kA, if design object is only considered 200kA and following fail safe, so every basic bar is all installed protector, and in 20 years, the thunderbolt spoilage of protector is about 6/10000, and its margin of safety is very big.If every interval one basic bar is installed one group of protector, then the thunderbolt spoilage of protector is 1.2 ‰.And every interval four basic bars are installed one group of protector, and then the thunderbolt spoilage of protector is 2.4 ‰.For guaranteeing the safe operation of protector, suggestion is easily hit the district to densely inhabited district or thunder and lightning, and every basic bar is installed one group of protector; the thunderbolt spoilage is 6/10000 in such 20 years; and, then one group of protector is installed every 3-5 base bar for general area, then the thunderbolt spoilage is about 3 ‰ in 20 years.
Series gap:
The series gap distance relation of protector is to the protective feature of protector, and it should satisfy under the lightning overvoltage effect by cooperating with the reasonable of insulator, and the series gap action message guarantees not flashover of insulator; Maximum power-frequency overvoltage can be tolerated reliably and series gap does not puncture.
Claims (3)
1, aerial insulated wire lightning protection device, it is characterized in that with the insulator on the insulated circuit (4) be support, be positioned at the below of insulated circuit (3), at the middle part of insulator (4), be positioned at suit drainage ring (2) on the insulator center pillar, lower end at insulator (4) is provided with connecting plate (5) by bolt, the non-linear current limiting element (1) of connecting between described drainage ring (2) and connecting plate (5) constitutes series gap by described drainage ring (2), non-linear current limiting element (1) with insulated circuit (3).
2, aerial insulated wire lightning protection device according to claim 1 is characterized in that described non-linear current limiting element (1) adopts the silicon rubber zinc oxide arrester.
3, aerial insulated wire lightning protection device according to claim 1 is characterized in that the stainless steel assembly that described drainage ring (2) is made up of two semicircles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101006315A CN101277005A (en) | 2008-05-12 | 2008-05-12 | Aerial insulated wire lightning protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101006315A CN101277005A (en) | 2008-05-12 | 2008-05-12 | Aerial insulated wire lightning protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101277005A true CN101277005A (en) | 2008-10-01 |
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ID=39996118
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101006315A Pending CN101277005A (en) | 2008-05-12 | 2008-05-12 | Aerial insulated wire lightning protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101277005A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102723707A (en) * | 2012-05-23 | 2012-10-10 | 河南省电力公司信阳供电公司 | Lightning protection device with overhead insulated line |
| CN107404114A (en) * | 2017-08-08 | 2017-11-28 | 芜湖市凯鑫避雷器有限责任公司 | A kind of Novel overvoltage protector structure |
-
2008
- 2008-05-12 CN CNA2008101006315A patent/CN101277005A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102723707A (en) * | 2012-05-23 | 2012-10-10 | 河南省电力公司信阳供电公司 | Lightning protection device with overhead insulated line |
| CN107404114A (en) * | 2017-08-08 | 2017-11-28 | 芜湖市凯鑫避雷器有限责任公司 | A kind of Novel overvoltage protector structure |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20081001 |