CN106409447B - A kind of parallel connection clearance device for glass insulator lightning protection - Google Patents
A kind of parallel connection clearance device for glass insulator lightning protection Download PDFInfo
- Publication number
- CN106409447B CN106409447B CN201611118064.7A CN201611118064A CN106409447B CN 106409447 B CN106409447 B CN 106409447B CN 201611118064 A CN201611118064 A CN 201611118064A CN 106409447 B CN106409447 B CN 106409447B
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- China
- Prior art keywords
- glass insulator
- gap electrode
- screening electrodes
- parallel connection
- lightning protection
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- 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
- H01B17/46—Means for providing an external arc-discharge path
-
- 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
- H01B17/48—Means for obtaining improved distribution of voltage; Protection against arc discharges over chains or other serially-arranged insulators
Abstract
The present invention be on a kind of parallel connection clearance device for glass insulator lightning protection, including：It is fixedly arranged on the upper gap electrode of glass insulator strings upper end；It is fixedly arranged on the lower gap electrode of the glass insulator strings lower end；And it is connected to the screening electrodes of the glass insulator strings between the upper gap electrode and the lower gap electrode.Technical scheme can reduce the situation that power frequency continued flow electric arc is run to insulator surface, improve the success rate of dredging to electric arc, improve the protecting effect to insulator chain.
Description
Technical field
The present invention relates to transmission line of electricity anti-thunder technical field, more particularly to it is a kind of for glass insulator lightning protection and
Join inter space device.
Background technology
Overhead transmission line is a kind of to be set up in ground and utilize the power transmission lines of insulator and air insulation.As
The major way of remote high voltage power transmission, overhead transmission line is commonly exposed in atmospheric environment, easily by meteorological condition
Influence, for example overhead transmission line is subject to thunderbolt under thunder and lightning weather condition.If overhead transmission line is by thunderbolt meeting
Cause insulator arc-over in circuit, and then cause tripping operation, cause long-time power failure；And after insulator arc-over occurs, on
Voltage between bottom electrode can be reduced to zero rapidly or close to zero, and the spark or electric arc in flashover passage can cause insulator surface office
Portion's overheat causes carbonization, damages the insulating materials of insulator surface.
Glass insulator is commonly used in the prior art, in order to carry out lightning protection to glass insulator, it will usually use
The measure of parallel connection gaps avoids glass insulator flashover.The measure of parallel connection gaps is in parallel with insulator on overhead transmission line
One inter space device, so as to form parallel connection gaps.Parallel connection gaps are a kind of Lightning stroke Protection Measures for Over-Head Lines of leading-type, can play and connect
Dodge thunder and lightning, transfer and dredge the effect of many aspects such as power frequency arc and uniform power frequency electric field.Because the insulation of parallel connection gaps is strong
Degree can be hit first less than the glass insulator that it is protected, therefore in thunderbolt between the upper and lower clearance electrode of parallel connection gaps
Wear, and produce afterflow electric arc.The electric arc being burning in the presence of the magnetic field force that short circuit current flow is produced, can along clearance electrode by
Gradually it is moved to the arcing point of the electrode and finally extinguishes.Because the presence of parallel connection gaps make it that the electric arc that thunderbolt is produced will not be to exhausted
The direction movement of edge, therefore set parallel connection gaps to reach the purpose of insulator chain on protection transmission line of electricity.
Although however, carrying out short circuit to insulation distance by the upper and lower clearance electrode of parallel connection gaps, enabling to impact to put
Electricity preferentially occurs in the inside of parallel connection gaps, so that the purpose of protection insulator chain is reached, but impulsive discharge can subsequently draw
Send out power frequency continued flow electric arc.The upper and lower arc root of power frequency continued flow electric arc can be stablized within a certain period of time to be moved between upper and lower clearance electrode
It is dynamic, but power frequency continued flow arc motion is complicated, electric arc may run to insulator surface under the influence of the factors such as wind-force, directly
Connecing causes parallel connection gaps to dredge that success rate is not high to electric arc, reduces protecting effect of the parallel connection gaps to insulator chain.
The content of the invention
A kind of parallel connection clearance device for glass insulator lightning protection is provided in the embodiment of the present invention, it is existing to solve
There is not high, the problem of the reducing to glass insulator protection effect of dredging success rate of parallel connection gaps in technology to electric arc.
In order to solve the above-mentioned technical problem, the embodiment of the present invention has invented following technical scheme：
The invention provides a kind of parallel connection clearance device for glass insulator lightning protection, including：
It is fixedly arranged on the upper gap electrode of glass insulator strings upper end；
It is fixedly arranged on the lower gap electrode of the glass insulator strings lower end；And,
The screening electrodes for the glass insulator strings being connected between the upper gap electrode and the lower gap electrode.
Preferably, the screening electrodes is multiple, and multiple screening electrodes are along the glass insulator strings length direction
Equidistantly arrangement.
Preferably, the quantity of the screening electrodes and the voltage class of overhead transmission line where the glass insulator strings
Positive correlation.
Preferably, the upper gap electrode both sides arcing point is smaller than the lower gap electrode both sides arcing point
Spacing；
The external diameter of multiple screening electrodes is incremented by successively from top to bottom, wherein, the external diameter of the top screening electrodes is more than
Or equal to the spacing of the upper gap electrode both sides arcing point, and bottom screening electrodes external diameter be less than or equal to it is described under
The spacing of splaying electrode both sides arcing point.
Preferably, the screening electrodes by fixture be located in the upper gap electrode and the lower gap electrode it
Between glass insulator strings on.
Preferably, the screening electrodes are grading ring.
Preferably, the anchor ring level of the grading ring, and the grading ring ring external diameter be more than or equal to the upper end between
The spacing of gap electrode both sides arcing point.
Preferably, the spacing at the edge of the screening electrodes and the glass insulator strings axis is more than or equal to
32cm。
Technical scheme provided in an embodiment of the present invention includes following beneficial effect：By between upper gap electrode and lower end
Screening electrodes are connected on glass insulator strings between gap electrode, the screening electrodes, which can play to connect, draws upper gap electrodes transfer
The power frequency continued flow electric arc come over, then screening electrodes power frequency continued flow electric arc is transferred to lower gap electrode so that by original from upper
Splaying electrode to one section of long electric arc between lower gap electrode is converted into two sections of short electric arcs, so as to shorten power frequency continued flow electricity
The move distance of arc, and then reduce the motion complexity of power frequency continued flow electric arc, reduce caused by wind-force etc. is acted on electric arc to
The situation that glass insulator strings direction is run, so that dredge success rate of the screening electrodes to power frequency continued flow electric arc is improved, raising pair
And then the protecting effect of glass insulator.
It should be appreciated that the general description of the above and detailed description hereinafter are only exemplary and explanatory, not
Can the limitation present invention.
Brief description of the drawings
Accompanying drawing herein is merged in specification and constitutes the part of this specification, shows the implementation for meeting the present invention
Example, and for explaining principle of the invention together with specification.
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, for those of ordinary skill in the art
Speech, without having to pay creative labor, can also obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 for it is provided in an embodiment of the present invention the first be used for glass insulator lightning protection parallel connection clearance device knot
Structure schematic diagram；
Fig. 2 is the second provided in an embodiment of the present invention knot for the parallel connection clearance device of glass insulator lightning protection
Structure schematic diagram；
Fig. 3 for it is provided in an embodiment of the present invention the third be used for glass insulator lightning protection parallel connection clearance device knot
Structure schematic diagram；
Fig. 4 is the knot of the 4th kind provided in an embodiment of the present invention parallel connection clearance device for being used for glass insulator lightning protection
Structure schematic diagram.
The corresponding relation of each structure and reference is as follows shown in Fig. 1 to Fig. 4：
1- glass insulator strings, 2- upper gaps electrode, 3- lower gaps electrode, 4- screening electrodes, 41- grading rings, 5-
Fixture.
Embodiment
The embodiment of the present invention provides a kind of parallel connection clearance device for glass insulator lightning protection, for solving background
Existing parallel connection gaps dredge that success rate is not high to electric arc in technology, the problem of not strong to the protection effect of glass insulator.
The parallel connection clearance device for glass insulator lightning protection of the embodiment of the present invention is illustrated first, such as schemed
Shown in 1, parallel connection clearance device provided in an embodiment of the present invention includes：
It is fixedly arranged on the upper gap electrode 2 of the upper end of glass insulator strings 1；Wherein, the upper end of upper gap electrode 2 is connected with
Shaft tower, lower end is connected with glass insulator.
It is fixedly arranged on the lower gap electrode 3 of the lower end of glass insulator strings 1；Wherein, the upper end of lower gap electrode 3 connects
Glass insulator is connected to, lower end is connected with aerial condutor.And,
The equal piezoelectricity for the glass insulator strings 1 being connected between the upper gap electrode 2 and the lower gap electrode 3
Pole 4.
Screening electrodes 4 are connected on the glass insulator strings 1 between upper gap electrode 2 and lower gap electrode 3, if by
To during thunderbolt, the electric arc of generation can be moved to screening electrodes 4 from upper gap electrode 2 first, then be shifted to down from screening electrodes 4
Splaying electrode 3, so that former one section of long electric arc is converted into two sections of short electric arcs.Preferably, screening electrodes 4 are located at two gap electricity
The centre position of pole.
The parallel connection clearance device for glass insulator lightning protection that embodiments of the invention are provided：By between upper end
Screening electrodes 4 are connected on glass insulator strings 1 between gap electrode 2 and lower gap electrode 3, the screening electrodes 4 can be played
Connect and draw the power frequency continued flow electric arc that upper gap electrode 2 is passed over, then power frequency continued flow electric arc is transferred to lower end by screening electrodes 4
Clearance electrode 3, so as to original is converted into from upper gap electrode 2 to one section of long electric arc between lower gap electrode 3 two sections short
Electric arc, so as to shorten the move distance of power frequency continued flow electric arc, and then reduces the motion complexity of power frequency continued flow electric arc, reduces
The situation that electric arc is run to the direction of glass insulator strings 1 caused by wind-force etc. is acted on, so that it is continuous to power frequency to improve screening electrodes 4
The protecting effect for dredging success rate, raising pair and then glass insulator of stream electric arc.
In many overhead transmission lines, the length of glass insulator strings 1 is long, electric if only one of which screening electrodes 4
Arc to dredge effect not strong, in order to solve the problem, as shown in Fig. 2 screening electrodes 4 can be multiple, multiple equal piezoelectricity
Equidistantly arranged along the length direction of glass insulator strings 1 pole 4.
By setting multiple screening electrodes 4, then by multiple screening electrodes 4 along between length direction of glass insulator strings 1 etc.
Away from arrangement, then power frequency continued flow electric arc can be equally divided into some sections by multiple screening electrodes 4, for example, screening electrodes 4 are 3
Individual, then electric arc is 4 sections.So as to further reduce the length of electric arc, that improves electric arc dredges success rate.
Wherein, the quantity of screening electrodes 4 and the voltage class positive of the place overhead transmission line of glass insulator strings 1
Close.
Voltage class is high, and the power frequency continued flow electric arc produced in thunderbolt is longer, and intensity is bigger, therefore screening electrodes 4 are counted
Amount and the voltage class positive correlation of overhead transmission line, it is possible to increase electric arc dredges success rate.For example：550kV overhead power transmissions
The quantity of the corresponding screening electrodes 4 of circuit can be 3 or more than 3；The corresponding screening electrodes 4 of 220kV overhead transmission lines
Quantity can be 1 or 2.
As a kind of preferred embodiment, as shown in figure 3, being smaller than for the both sides arcing point of upper gap electrode 2 is described
The spacing of the both sides arcing point of lower gap electrode 3；
The external diameter of multiple screening electrodes 4 is incremented by successively from top to bottom, wherein, the external diameter of the top screening electrodes 4 is big
In or equal to the both sides arcing point of upper gap electrode 2 spacing, and bottom screening electrodes 4 external diameter be less than or equal to institute
State the spacing of the both sides arcing point of lower gap electrode 3.
External diameter by multiple screening electrodes 4 is incremented by successively from top to bottom, then electric arc can be in transmittance process from top to bottom
In, the distance with glass insulator strings 1 is more and more remote, so that reduce electric arc drifts to glass insulation under the effect of the external force such as wind-force
The possibility of son, further improve electric arc dredges success rate.
For protective glass insulator chain 1, the electric arc between clearance electrode and screening electrodes 4 is made as far as possible away from glass insulator
String 1, the spacing at the edge of screening electrodes 4 and the axis of glass insulator strings 1 is more than or equal to 32cm.
Parallel connection clearance device is commonly located at open air, is got rusty easily in the environment of wind and weather, so as to influence screening electrodes
Conductance, in order to ensure the conductance of screening electrodes, the screening electrodes 4 improved in electric arc guiding success rate, the present embodiment can
For stainless steel screening electrodes, by the way that screening electrodes 4 are set into stainless steel screening electrodes, in the environment of wind and weather, the electricity
Pole is difficult to get rusty, therefore the guiding success rate of electric arc is higher.
As shown in figure 4, screening electrodes 4 are located in the upper gap electrode 2 and the lower gap electrode by fixture 5
On glass insulator strings 1 between 3.Screening electrodes 4 are located in by upper gap electrode 2 and lower gap by using fixture 5
On glass insulator strings 1 between electrode 3, it is not necessary to which glass insulator strings 1 are dismantled, so that installation difficulty is reduced,
It subsequently can repeatedly install and remove the screening electrodes 4.
As shown in figure 4, screening electrodes 4 are grading ring 41.Screening electrodes 4 are grading ring 41, being capable of balanced radial electric current.
The anchor ring level of pressure ring 41, and the ring external diameter of the grading ring 41 is more than or equal to the both sides arcing point of upper gap electrode 2
Spacing.
The ring external diameter of grading ring 41 is more than or equal to the spacing of the both sides arcing point of upper gap electrode 2, enables to upper end
Clearance electrode 2 flows to the power frequency continued flow electric arc of grading ring 41 further away from glass insulator strings 1, so as to reduce electric arc to insulation
The situation of substring drift.
The parallel connection clearance device for glass insulator lightning protection that embodiments of the invention are provided：By between upper end
Screening electrodes 4 are connected on glass insulator strings 1 between gap electrode 2 and lower gap electrode 3, the screening electrodes 4 can be played
Connect and draw the power frequency continued flow electric arc that upper gap electrode 2 is passed over, then power frequency continued flow electric arc is transferred to lower end by screening electrodes 4
Clearance electrode 3, so as to original is converted into from upper gap electrode 2 to one section of long electric arc between lower gap electrode 3 two sections short
Electric arc, so as to shorten the move distance of power frequency continued flow electric arc, and then reduces the motion complexity of power frequency continued flow electric arc, reduces
The situation that electric arc is run to the direction of glass insulator strings 1 caused by wind-force etc. is acted on, so that it is continuous to power frequency to improve screening electrodes 4
The protecting effect for dredging success rate, raising pair and then glass insulator of stream electric arc.
Described above is only the embodiment of the present invention, is made skilled artisans appreciate that or realizing this hair
It is bright.A variety of modifications to these embodiments will be apparent to one skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to principle and features of novelty phase one with being invented herein
The most wide scope caused.
Described above is only the embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (7)
1. a kind of parallel connection clearance device for glass insulator lightning protection, it is characterised in that including：
It is fixedly arranged on the upper gap electrode (2) of glass insulator strings (1) upper end；
It is fixedly arranged on the lower gap electrode (3) of the glass insulator strings (1) lower end；And,
The pressure for the glass insulator strings (1) being connected between the upper gap electrode (2) and the lower gap electrode (3)
Electrode (4)；
Wherein, the screening electrodes (4) is multiple, and multiple screening electrodes (4) are along the glass insulator strings (1) length side
To equidistant arrangement；
Upper gap electrode (2) both sides arcing point is smaller than between the arcing point of lower gap electrode (3) both sides
Away from；
The external diameter of multiple screening electrodes (4) is incremented by successively from top to bottom, wherein, the external diameter of the top screening electrodes be more than or
Equal to the spacing of upper gap electrode (2) both sides arcing point, and bottom screening electrodes external diameter be less than or equal to it is described
The spacing of lower gap electrode (3) both sides arcing point.
2. the parallel connection clearance device according to claim 1 for glass insulator lightning protection, it is characterised in that described
The quantity of screening electrodes (4) and the voltage class positive correlation of overhead transmission line where the glass insulator strings (1).
3. the parallel connection clearance device according to claim 1 for glass insulator lightning protection, it is characterised in that described
Screening electrodes (4) are located in the glass between the upper gap electrode (2) and the lower gap electrode (3) by fixture (5)
On glass insulator chain (1).
4. the parallel connection clearance device according to claim 1 for glass insulator lightning protection, it is characterised in that described
Screening electrodes (4) are grading ring (41).
5. the parallel connection clearance device according to claim 4 for glass insulator lightning protection, it is characterised in that described
The anchor ring level of grading ring (41), and the ring external diameter of the grading ring (41) is more than or equal to the upper gap electrode (2) two
The spacing of side arcing point.
6. the parallel connection clearance device according to claim 1 for glass insulator lightning protection, it is characterised in that described
The edge of screening electrodes (4) is more than or equal to 32cm with the spacing of the glass insulator strings (1) axis.
7. the parallel connection clearance device according to claim 1 for glass insulator lightning protection, it is characterised in that described
Screening electrodes (4) are stainless steel screening electrodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611118064.7A CN106409447B (en) | 2016-12-07 | 2016-12-07 | A kind of parallel connection clearance device for glass insulator lightning protection |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611118064.7A CN106409447B (en) | 2016-12-07 | 2016-12-07 | A kind of parallel connection clearance device for glass insulator lightning protection |
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| Publication Number | Publication Date |
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| CN106409447A CN106409447A (en) | 2017-02-15 |
| CN106409447B true CN106409447B (en) | 2017-11-07 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110346636B (en) * | 2019-07-18 | 2021-08-13 | 广东电网有限责任公司 | Direct lightning protection effect evaluation method for overhead line arrester spacer configuration |
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| CN201975778U (en) * | 2011-03-14 | 2011-09-14 | 华北电网有限公司北京超高压公司 | Drop indication type lightning protection gap |
| CN202749168U (en) * | 2012-09-13 | 2013-02-20 | 重庆市电力公司检修分公司 | Ultra-high voltage line composite insulator with barrier device |
| CN204904933U (en) * | 2015-08-21 | 2015-12-23 | 江苏双汇孚泰电气有限公司 | Trigeminy strain insulator string is hit in lightning protection |
| CN105845287B (en) * | 2016-05-26 | 2017-11-03 | 国网新疆电力公司乌鲁木齐供电公司 | A kind of outdoor post insulator post of three element structures |
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