CN105938978A - Multi-gap lightning-protection insulator used for alternating-current overhead transmission line - Google Patents
Multi-gap lightning-protection insulator used for alternating-current overhead transmission line Download PDFInfo
- Publication number
- CN105938978A CN105938978A CN201610383276.1A CN201610383276A CN105938978A CN 105938978 A CN105938978 A CN 105938978A CN 201610383276 A CN201610383276 A CN 201610383276A CN 105938978 A CN105938978 A CN 105938978A
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- Prior art keywords
- gap
- arc
- transmission line
- insulator
- multiple level
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T4/00—Overvoltage arresters using spark gaps
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/02—Suspension insulators; Strain insulators
- H01B17/04—Chains; Multiple chains
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/42—Means for obtaining improved distribution of voltage; Protection against arc discharges
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T4/00—Overvoltage arresters using spark gaps
- H01T4/16—Overvoltage arresters using spark gaps having a plurality of gaps arranged in series
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G13/00—Installations of lightning conductors; Fastening thereof to supporting structure
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Insulators (AREA)
Abstract
The invention discloses a multi-gap lightning-protection insulator used for an alternating-current overhead transmission line. The multi-gap lightning-protection insulator is formed by combining an arc blowing structure consisting of a multi-gap arc extinguish chamber system and an insulating material with a composite insulator chain with a certain length. During normal operation of an electric power system, the multi-gap lightning-protection insulator is the same as a long rod suspension insulator in function to achieve mechanical supporting and electric potential isolation effects; when overvoltage generated in the transmission line reaches a certain value, tandem multiple gaps are punctured, an arc passage is established, an arc is stretched by using high temperature and high voltage generated by the arc at the same time until the arc is extinguished finally; the time of duration in the process is extremely short, and action tripping of a relay protection device cannot be caused while lightning current is leaked, so that the reliability of power supply is greatly improved. The function of the insulator and the function of a lightning arrester are combined into one body, so that devices installed on power transmission line poles and towers are greatly reduced.
Description
Technical field
The present invention relates to the insulator in lightning protection device, be specifically related to a kind of for exchanging
The Multiple level lightning protection insulator of overhead transmission line.
Background technology
Along with the development of China's economic construction, power system overlay area is increasingly wider, system
Capacity grows with each passing day, and the safe and reliable operation of transmission line of electricity increasingly affects socioeconomic
Exhibition.Thunder and lightning is very big to electric network influencing, the property loss and the person that China causes because being struck by lightning every year
Injures and deaths are countless, and in power system, the damage to crops caused by thunder of transmission line of electricity is more serious, to electrical network
Safe operation bring greater impact.In order to ensure circuit reliability of operation, need more
Many leakage conductors are put in transmission line of electricity, even completely zinc oxide surge arresters, and cost is huge
Greatly.
A kind of novel spark gap multiple short air gap spark gap, owing to its material becomes
The reasons such as this is the lowest, ruggedness is strong and cost performance is high enter the visual field of people, and cause
Extensive concern in industry.Multiple short air gap spark gap combines " blocking type " lightning protection and " dredges
Conductivity type " thought of lightning protection, it is allowed to insulate breakdown electric arc of setting up, and the gap of series connection is lightning-arrest
Device provides the passage of lightning current of releasing；Meanwhile, the High Temperature High Pressure that application electric arc produces is elongated
Electric arc, until last arc extinction, this process duration is extremely short, at lightning current of releasing
While protective relaying device action will not be caused to trip, the reliability of power supply obtains the biggest
Improve.
It addition, transmission line of electricity needs to install substantial amounts of insulator, therefore, for ensureing circuit
The operation of normal safe, has in circuit install substantial amounts of device.And substantial amounts of dress is installed
Put the cost of investment on the one hand adding transmission line of electricity, on the other hand too increase line upkeep
Difficulty and cost.Therefore, find a kind of economical, effective and circuit can be reduced as far as possible
The Lightning Protection of erecting device also becomes a new research direction.
Summary of the invention
The purpose of the present invention is exactly the shortcoming and defect being to overcome existing lightning protection measures to exist,
There is provided a kind of be made up of the combination of Multiple level arc-chutes system and composite insulator string for exchanging
The Multiple level lightning protection insulator of overhead transmission line.
For achieving the above object, designed by the present invention for exchange overhead transmission line many
Gap lightning protection insulator, the ball-and-socket including plug, being connected to plug low-pressure end, is connected to core
The rod bulb of high-pressure side and be set on the on high-tension side composite insulator string of plug, also includes being nested with
The insulating cylinder of described plug low-pressure side and be helically wound insulating cylinder surface many between
Gap arc-chutes system, described Multiple level arc-chutes system includes arranging along described insulating cylinder surface
Helical form silastic-layer and be uniformly embedded in described helical form silastic-layer along the hand of spiral
Multiple electrodes, have gap between the most adjacent two electrodes, described helical form silastic-layer and
Face and at each interstitial site, have the through hole being in communication with the outside, described through hole and described between
Gap connects.
Further, caved inward bottom the gap between the most adjacent described two electrodes gas
Chamber.
Further, the helical form silastic-layer top of described Multiple level arc-chutes system and low
End is all disposed with cylinder electrode；The top of described insulating cylinder is fixedly connected with the first grading ring,
Described first grading ring leaves air with the cylinder electrode on described Multiple level arc-chutes system top
Gap；The bottom of described insulating cylinder is fixedly connected with the second grading ring, described second grading ring
The air gap, and described is left with the cylinder electrode of described Multiple level arc-chutes system bottom
Two grading rings are positioned at the top of described composite insulator string；It is nested with at described plug on high-tension side
3rd grading ring, and described 3rd grading ring is positioned at the lower section of described composite insulator string.
Further, the clearance distance between the most adjacent described two electrodes is 0.5～10mm,
Described through-hole aperture is more than clearance distance and less than electrode diameter.
Further, the edge, each through hole end of described helical form silastic-layer is provided with convex
Rising, described projection forms outlet protection hole to the outlet introversion of described through hole.
Further, described electrode is spherical steel ball or cylindrical steel ball.
Further, described insulating cylinder is epoxy resins insulation cylinder.
Further, described air cavity is peach-shaped air cavity.
The beneficial effects of the present invention is: the Multiple level lightning protection insulator of the present invention is by Multiple level
The arc blow-out structure of arc-chutes system and insulant composition and there is the compound inslation of certain length
Substring combines, when power system is properly functioning, and Multiple level lightning protection insulator and rod
Suspension insulator subfunction is identical, plays mechanical support and potential isolation effect；When in transmission line of electricity
When the overvoltage produced reaches certain value, many respacings of series connection are breakdown, set up electric arc and lead to
Road, the High Temperature High Pressure elongating arc that application electric arc produces simultaneously, until last arc extinction,
This process duration is extremely short, and relay protection will not be caused while lightning current of releasing to fill
Putting action tripping operation, the reliability of power supply is greatly improved；
Insulator function and spark gap function are combined as a whole by the present invention, greatly reduce peace
The device being contained on electric power line pole tower.This Multiple level lightning protection insulator simple in construction simultaneously,
The silicone rubber and the epoxide resin material that use are relatively common, cheap, greatly reduce defeated
The investment of electric line and operation expense.
Accompanying drawing explanation
Fig. 1 is that the present invention is for exchanging the knot of the Multiple level lightning protection insulator of overhead transmission line
Structure schematic diagram；
Fig. 2 is the structural representation of arc-chutes unit in Fig. 1.
In figure: plug 1, ball-and-socket 2, bulb 3, composite insulator string 4, epoxy resin are exhausted
Edge cylinder 5, Multiple level arc-chutes system 6, helical form silastic-layer 7, electrode 8, gap 9,
Through hole 10, air cavity 11, cylinder electrode the 12, first grading ring the 13, second grading ring 14,
3rd grading ring 15, projection 16, protection hole 17.
Detailed description of the invention
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
The Multiple level lightning protection insulator for exchanging overhead transmission line designed by the present invention,
The arc blow-out structure that is made up of Multiple level arc-chutes system and insulant and there is certain length
Composite insulator string combines, i.e. low-pressure end is Multiple level arc-chutes system and insulant
The arc blow-out structure of composition, this arc blow-out structure is main group of Multiple level lightning protection insulator of the present invention
Becoming part, high-pressure side is the main gap of the composite insulator string composition of certain length.
Include plug 1 as shown in Figure 1, be connected to the ball-and-socket 2 of plug 1 low-pressure end and be connected to
The bulb 3 of plug 1 high-pressure side, and be nested with successively on plug 1 from high-pressure side to low-pressure end
The 3rd grading ring 15, composite insulator string the 4, second grading ring 14, epoxy resins insulation
Cylinder 5 and the first grading ring 13；Wherein: ball-and-socket 2 is fixed on the horizontal stroke of AC power line line pole tower
In load, bulb 3 connects high-voltage conducting wires, and plug 1 plays support and pendency effect；It addition, ring
Epoxy resins insulating cylinder 5 surface has been helically wound Multiple level arc-chutes system 6；Meanwhile,
The top of the first grading ring 13 and epoxy resins insulation cylinder 5 is fixed, the second grading ring 14 with
The bottom of epoxy resins insulation cylinder 5 is fixed, and the second grading ring 14 is positioned at composite insulator string
The top of 4, the 3rd grading ring 15 is positioned at the lower section of composite insulator string 6.
Shown in Fig. 2, in the present embodiment, Multiple level arc-chutes system 6 includes along asphalt mixtures modified by epoxy resin
Fat insulating cylinder 5 surface arrange helical form silastic-layer 7, be uniformly embedded in spiral shell along the hand of spiral
Rotation shape silastic-layer 7 in multiple electrodes 8 and be arranged in helical form silastic-layer 7 top and
The cylinder electrode 12 of low side, has gap 9, and the most adjacent two between the most adjacent two electrodes 8
Gap 9 distance between individual electrode 8 is 0.5～10mm；Helical form silastic-layer 7 and the most right
Position, each gap 9 and have the through hole 10 being in communication with the outside, through hole 10 is with gap 9 even
Logical, and through hole 10 aperture more than gap 9 apart from and less than electrode 8 diameter, prevent electrode 8
Landing goes out helical form silastic-layer 7；Between the most adjacent two electrodes 8, adjacent two electrodes 8
Gap 9, helical form silastic-layer 7 around adjacent two electrodes 8 and corresponding with gap 9
Through hole 10 form the arc-chutes unit of one end open, i.e. the number of arc-chutes unit compares electrode
Few one of number, helical form silastic-layer and be embedded in helical form silastic-layer multiple
Electrode forms multiple short (0.5～10mm) gap.
The cylinder electrode 12 at Multiple level arc-chutes system 6 two ends is with the grading ring at its two ends (i.e.
First grading ring 13 and the second grading ring 14) close, and leave certain the air gap, ring
Epoxy resins insulating cylinder 5 and Multiple level arc-chutes system 6 constitute arc blow-out structure, composite insulator
String 4 constitutes main with the grading ring (i.e. second grading ring 14 and the 3rd grading ring 15) at its two ends
Gap is to improve the withstanding voltage of device.
It addition, in the present embodiment, electrode 8 is spherical steel ball or cylindrical steel ball, due to electrode 8
Spacing less (0.5～10mm), the Electric Field Distribution between electrode 8 is more uniform, and air gap is put
There is not polar effect and corona phenomenon in electricity, the dispersibility of electric discharge is the least, simultaneously at spark chamber
Inside, the gas heat that gap breakdown causes increases, and short time inner high voltage gas can only be along logical
Electric arc is outwards blown out by direction, hole, has good blow-out performance.
Meanwhile, caved inward bottom gap 9 between the most adjacent two electrodes 8 air cavity 11,
And air cavity is peach-shaped air cavity 11, the high temperature that arc burning produces makes the gas in air cavity 11 drastically
Expanding, consequent high pressure orders about electric arc and moves to through hole；Helical form silastic-layer 7
Each through hole 10 end edge along being provided with protruding 16, protruding 16 in the outlet of through hole 10
Hole 17 is protected in formation outlet of inclining, and is used for protecting through hole 10 and gap 9 without falling into filth.
When power system is properly functioning, it is lightning-arrest absolutely that transmission line of electricity voltage-to-ground is added in Multiple level
Edge two ends, Multiple level lightning protection insulator is identical with rod insulator insulator function, plays machinery
Support and potential isolation effect, have intensity sudden strain of a muscle pollution flashover voltage high, wet high, the most broken,
The features such as operation maintenance is convenient；When the overvoltage produced in transmission line of electricity reaches certain value,
In Multiple level lightning protection insulator, many respacings of series connection are breakdown, form arc channel, thunder and lightning
Stream is released by Multiple level arc-chutes system, and can the most effectively extinguish electric arc, with
Spark gap function is identical.
When transmission line of electricity produces overvoltage, Multiple level lightning protection insulator head end and end shape
The potential difference become is added in Multiple level arc-chutes system and main gap two ends, and overvoltage reaches certain
During value, the small-gap suture between electrode is breakdown, and its little electric arc of internal generation, electric arc is at arc extinguishing
The high temperature that Indoor Combustion produces makes the gas in arc-chutes expand rapidly, produces huge gas
Pressure, and arc-chutes unit is single-open structure, electric arc edge under high temperature and high pressure gas effect
Single radial cut side spray goes out, and electric arc is elongated, and arc road resistance increases, and arc current reduces, due to
Electric arc C-V characteristic is negative, arc voltage increase, electric current persistently reduces, arc voltage increase until
Both end voltage does not maintains arc burning, arc extinction；Simultaneously during this, electric arc quilt
Being elongated to outside arc-chutes, the arc blowing function of air accelerates the cooling of electric arc, is more beneficial for
The extinguishing of electric arc, accelerates the arc extinguishing process of spark gap.The most both released lightning current, again
Can extinguish power frequency continued flow before protective relaying device sends actuating signal, circuit will not trip,
Reach the purpose not having a power failure.
Additionally, the main body of Multiple level lightning protection insulator low-pressure end arc blow-out structure uses epoxy resin
Insulating cylinder, Multiple level arc-chutes system is wrapped in epoxy resins insulation cylinder table in a helical pattern
Face, this arrangement fully and reasonably make use of space and height, is distributed as much as possible
Short air gap arc-chutes unit.Experiment proves that, greater number of short air gap arc-chutes unit string
The Multiple level arc-chutes system of connection is more favourable to the optimization of Multiple level lightning protection insulator performance.
It is the composite insulator string with certain length with the main gap of arc blow-out structures in series, many
The withstanding voltage of gap lightning protection insulator entirety depends primarily on main gap, it is possible to be effectively improved
The withstanding voltage level that Multiple level lightning protection insulator is overall.Arc blow-out structure and main gap are with same
Root plug is fixed into an entirety, forms the Multiple level lightning protection insulator with spark gap function.
Its intensity sudden strain of a muscle pollution flashover voltage high, wet is high, the most broken, operation maintenance convenient, power system
Time properly functioning, this Multiple level lightning protection insulator plays mechanical support and potential isolation effect；And
The umbrella disk structure of main gap can the creep distance of aggrandizement apparatus so that it is be applicable to heavy pollution district.Wherein,
The insulant of Multiple level lightning protection insulator selects common silicone rubber and epoxide resin material,
Excellent performance and cheap.
Insulator and spark gap function are integrated, decrease and be arranged on electric power line pole tower
On Multiple level lightning protection insulator, and this Multiple level lightning protection insulator simple in construction, cost are low
Honest and clean, easy to maintenance, greatly reduce cost of investment and maintenance cost.
Claims (8)
1. for exchanging a Multiple level lightning protection insulator for overhead transmission line, including plug
(1), it is connected to the ball-and-socket (2) of plug (1) low-pressure end, is connected to plug (1) high pressure
End bulb (3) and be set on plug (1) on high-tension side composite insulator string (4), its
Be characterised by: also include being nested with described plug (1) low-pressure side insulating cylinder (5) and with
Spiral way is wrapped in Multiple level arc-chutes system (6) on insulating cylinder (5) surface, described many
Gap arc-chutes system (6) includes the helical form silicon arranged along described insulating cylinder (5) surface
Rubber layer (7) and in be uniformly embedded in described helical form silastic-layer (7) along the hand of spiral
Multiple electrodes (8), have gap (9), described spiral between the most adjacent two electrodes (8)
Shape silastic-layer (7) and face each gap (9) position and have and be in communication with the outside
Through hole (10), described through hole (10) connects with described gap (9).
Multiple level for exchanging overhead transmission line the most according to claim 1 is taken shelter from the thunder
Insulator, it is characterised in that: the gap (9) between the most adjacent described two electrodes (8)
Bottom has caved inward air cavity (11).
Multiple level for exchanging overhead transmission line the most according to claim 1 is taken shelter from the thunder
Insulator, it is characterised in that: the helical form silicone rubber of described Multiple level arc-chutes system (6)
Layer (7) top and low side are all disposed with cylinder electrode (12)；The top of described insulating cylinder (5)
End is fixedly connected with the first grading ring (13), described first grading ring (13) and described many between
The cylinder electrode (12) on gap arc-chutes system (6) top leaves the air gap；Described insulation
The bottom of cylinder (5) is fixedly connected with the second grading ring (14), described second grading ring (14)
The air gap is left with the cylinder electrode (12) of described Multiple level arc-chutes system (6) bottom,
And described second grading ring (14) is positioned at the top of described composite insulator string (4)；It is nested with
At on high-tension side 3rd grading ring (15) of described plug (1), and described 3rd grading ring (15)
It is positioned at the lower section of described composite insulator string (4).
4. exchange overhead transmission line according to being used for described in claim 1 or 2 or 3 many
Gap lightning protection insulator, it is characterised in that: between the most adjacent described two electrodes (8)
Gap (9) distance is 0.5～10mm, and described through hole (10) aperture is more than gap (9) distance
And less than electrode (8) diameter.
5. exchange overhead transmission line according to being used for described in claim 1 or 2 or 3 many
Gap lightning protection insulator, it is characterised in that: each of described helical form silastic-layer (7) is led to
Hole (10) end edge is along being provided with projection (16), and described projection (16) is to described through hole (10)
Outlet introversion formed outlet protection hole (17).
6. exchange overhead transmission line according to being used for described in claim 1 or 2 or 3 many
Gap lightning protection insulator, it is characterised in that: described electrode (8) be spherical steel ball (8) or
Cylindrical steel ball (8).
7. exchange overhead transmission line according to being used for described in claim 1 or 2 or 3 many
Gap lightning protection insulator, it is characterised in that: described insulating cylinder (5) is epoxy resins insulation cylinder
(5)。
Multiple level for exchanging overhead transmission line the most according to claim 2 is taken shelter from the thunder
Insulator, it is characterised in that: described air cavity (11) is peach-shaped air cavity (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610383276.1A CN105938978A (en) | 2016-06-01 | 2016-06-01 | Multi-gap lightning-protection insulator used for alternating-current overhead transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610383276.1A CN105938978A (en) | 2016-06-01 | 2016-06-01 | Multi-gap lightning-protection insulator used for alternating-current overhead transmission line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105938978A true CN105938978A (en) | 2016-09-14 |
Family
ID=57151845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610383276.1A Withdrawn CN105938978A (en) | 2016-06-01 | 2016-06-01 | Multi-gap lightning-protection insulator used for alternating-current overhead transmission line |
Country Status (1)
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| CN (1) | CN105938978A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107369508A (en) * | 2017-07-19 | 2017-11-21 | 国网湖南省电力公司 | A kind of arrester |
| CN108365519A (en) * | 2018-02-07 | 2018-08-03 | 国网湖北省电力有限公司电力科学研究院 | A kind of transmission line of electricity overvoltage protection |
| 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 |
| CN109961618A (en) * | 2019-03-22 | 2019-07-02 | 国网湖南省电力有限公司 | Composite insulator V-type arranges string falling prevention improvement and alarming method for power |
| CN110176719A (en) * | 2019-06-20 | 2019-08-27 | 武汉爱伦菲尼克斯科技有限责任公司 | A kind of Multiple level arrester with insulator function |
| CN110731037A (en) * | 2017-05-05 | 2020-01-24 | 西美雷电气有限公司 | Lightning arrester with plenum chamber |
| CN111627621A (en) * | 2020-04-23 | 2020-09-04 | 浙江正远电力装备有限公司 | 10kV lightning-protection anti-icing insulator and manufacturing process thereof |
| WO2020215650A1 (en) * | 2019-04-22 | 2020-10-29 | 中国电力科学研究院有限公司 | Lightning arrester having external series gap and lightning protection system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110731037A (en) * | 2017-05-05 | 2020-01-24 | 西美雷电气有限公司 | Lightning arrester with plenum chamber |
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| 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 |
| CN109961618A (en) * | 2019-03-22 | 2019-07-02 | 国网湖南省电力有限公司 | Composite insulator V-type arranges string falling prevention improvement and alarming method for power |
| CN109961618B (en) * | 2019-03-22 | 2020-09-01 | 国网湖南省电力有限公司 | Composite insulator V-shaped arrangement anti-string-falling treatment and warning method |
| WO2020215650A1 (en) * | 2019-04-22 | 2020-10-29 | 中国电力科学研究院有限公司 | Lightning arrester having external series gap and lightning protection system |
| CN110176719A (en) * | 2019-06-20 | 2019-08-27 | 武汉爱伦菲尼克斯科技有限责任公司 | A kind of Multiple level arrester with insulator function |
| CN111627621A (en) * | 2020-04-23 | 2020-09-04 | 浙江正远电力装备有限公司 | 10kV lightning-protection anti-icing insulator and manufacturing process thereof |
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Application publication date: 20160914 |