CN204010854U - A kind of discharging gap apparatus - Google Patents
A kind of discharging gap apparatus Download PDFInfo
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- CN204010854U CN204010854U CN201420308655.0U CN201420308655U CN204010854U CN 204010854 U CN204010854 U CN 204010854U CN 201420308655 U CN201420308655 U CN 201420308655U CN 204010854 U CN204010854 U CN 204010854U
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- 238000007599 discharging Methods 0.000 title claims abstract description 28
- 239000012212 insulator Substances 0.000 claims abstract description 27
- 238000005452 bending Methods 0.000 claims description 12
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 15
- 238000010891 electric arc Methods 0.000 description 8
- 238000009413 insulation Methods 0.000 description 5
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 3
- 241000883966 Astrophytum capricorne Species 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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Abstract
The utility model discloses a kind of discharging gap apparatus, this discharging gap apparatus is positioned on ground insulator string, described discharging gap apparatus comprises the first securing member, the second securing member, the first fixed head, the second fixed head, top electrode and bottom electrode, the first fixed head head end is fixed on the high-pressure side of ground insulator string by the first securing member, the end of the first fixed head connects the head end of top electrode, the end of top electrode is for recruiting arc end, the second fixed head head end is fixed on the low-pressure end of ground insulator string by the second securing member, the end of the second fixed head connects bottom electrode head end, the end arc end of bottom electrode, recruit arc end and arc end to leave space.The beneficial effects of the utility model: ground insulator gap is adjustable clearance, if gap does not meet ground wire deicing or lightning protection properties requirement in Practical Project, can adjust simple operation.
Description
Technical field
The utility model relates to a kind of discharging gap apparatus.
Background technology
Discharging gap is the conventional gas discharge device of high voltage technique; generally be used for controlling the break-make of high voltage circuit; utilize the intermediate air gap discharging in advance of this structure to prevent the protection of various overvoltage (as the overvoltage such as thunder and lightning, operation) to high-tension apparatuses such as bushings, effect is analogous to lightning arrester and overvoltage protection device.Discharging gap is made up of two electrodes conventionally, one connects high-pressure side, another connects low-pressure end, between two electrodes, it is state of insulation, in the time that the voltage between two electrodes reaches puncture voltage, the breakdown one-tenth conducting state that insulate, after afterflow disappears, between two electrodes of recovery certainly due to insulation, have the state of insulation of becoming, thereby loop is again in off-state.
Transmission line is located in wilderness, is subject to thunderbolt.Because of near the lightning induced voltage that the thunderbolt direct lightning strike overvoltage that causes of circuit and thunderbolt circuit, ground causes, the i.e. atmospheric over-voltage of normal appearance on so-called transmission line.Insulator arc-over, line tripping and lightning surge intrusion electric substation damage electric equipment accident that it causes are occupied very most of in the total accident of electrical network.
Therefore,, for addressing the above problem, spy provides a kind of new technical scheme.
Utility model content
The utility model provides a kind of discharging gap apparatus.
The technical solution adopted in the utility model is:
A kind of discharging gap apparatus, this discharging gap apparatus is positioned on ground insulator string, described discharging gap apparatus comprises the first securing member, the second securing member, the first fixed head, the second fixed head, top electrode and bottom electrode, described the first fixed head head end is fixed on the high-pressure side of ground insulator string by the first securing member, the end of the first fixed head connects the head end of top electrode, the end of described top electrode is for recruiting arc end, described the second fixed head head end is fixed on the low-pressure end of ground insulator string by the second securing member, the end of the second fixed head connects bottom electrode head end, the end arc end of described bottom electrode, described trick arc end and arc end leave space.
Described trick arc end is bending from lower to upper, and described arc end is bending from top to bottom.
Described trick arc end from lower to upper bending angle and arc end from top to bottom bending angle be 30-45 °.
The beneficial effects of the utility model are: ground insulator gap is adjustable clearance, if gap does not meet ground wire deicing or lightning protection properties requirement in Practical Project, can adjust simple operation;
It is effective lightning protection device, be arranged on insulator string end with certain gap, simple in structure, easy to maintenance, in system, be used in conjunction with automatic reclosing, both can be by timely lightning current ground connection, again can be to user's uninterrupted power supply, prevent insulator surface flashover, protect electric equipment, maintain the effect of the normal operation of circuit thereby play;
On ground insulator string, discharging gap is installed, with respect to lightning conducter is got up through the insulation against ground of little gap, gap breakdown while only having thunderbolt, ground wire grounding, this had both reduced the supplementary load loss that when circuit normally moves, in lightning conducter, electric current causes, lightning conducter can be doubled as again to connection and use;
When gap discharge, electric arc apart forms the most nearby at electrode, the electric arc that top, erietiform gap forms is immediately elongated rapidly, this electric arc is generally easy to extinguish, also can be because drawing on electric arc, electrode is burnt all in end, goat's horn gap, and the minimum place of clearance distance can not burn, thereby ensures correct operation next time;
Install an apiculus additional at gap location, to increase gap electrical field unevenness.
Brief description of the drawings
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Fig. 1 is the structural representation of embodiment 1, and wherein a is suspension string gold utensil, and b is strain insulator-string gold utensil.
Wherein: 1, the first securing member, 2, the second securing member, 3, the first fixed head, 4, the second fixed head, 5, top electrode, 6, bottom electrode, 7, ground insulator string, 8, recruit arc end, 9, arc end.
Embodiment
In order to deepen understanding of the present utility model, be described in further detail of the present utility model below in conjunction with embodiment and accompanying drawing, this embodiment only, for explaining the utility model, does not form the restriction to protection range of the present utility model.
Embodiment 1
As shown in Figure 1, a kind of discharging gap apparatus of the present utility model, this discharging gap apparatus is positioned on ground insulator string, discharging gap apparatus comprises the first securing member 1, the second securing member 2, the first fixed head 3, the second fixed head 4, top electrode 5 and bottom electrode 6, the first fixed head 3 head ends are fixed on the high-pressure side of ground insulator string 7 by the first securing member 1, the end of the first fixed head 3 connects the head end of top electrode 5, the end of top electrode 5 is for recruiting arc end 8, the second fixed head 4 head ends are fixed on the low-pressure end of ground insulator string 7 by the second securing member 2, the end of the second fixed head 4 connects bottom electrode 6 head ends, the end arc end 9 of bottom electrode 6, recruit arc end 8 and arc end 9 to leave space, recruit arc end 8 bending from lower to upper, arc end 9 is bending from top to bottom, recruit arc end 8 from lower to upper bending angle and arc end 9 from top to bottom bending angle be 30-45 °, when gap discharge, electric arc apart forms the most nearby at electrode, the electric arc that top, twin horn cleat shape gap forms is immediately elongated rapidly, this electric arc is generally easy to extinguish, also can be because drawing on electric arc, electrode is burnt all in end, goat's horn gap, the minimum place of clearance distance can not burn, thereby ensure correct operation next time.
It is effective lightning protection device, be arranged on insulator string end with certain gap, simple in structure, easy to maintenance, in system, be used in conjunction with automatic reclosing, both can be by timely lightning current ground connection, again can be to user's uninterrupted power supply, prevent insulator surface flashover, protect electric equipment, maintain the effect of the normal operation of circuit thereby play;
On ground insulator string, discharging gap is installed, with respect to lightning conducter is got up through the insulation against ground of little gap, gap breakdown while only having thunderbolt, ground wire grounding, this had both reduced the supplementary load loss that when circuit normally moves, in lightning conducter, electric current causes, lightning conducter can be doubled as again to connection and use.
The electrical test of the utility model discharging gap requires:
According to the function of discharging gap apparatus and designing requirement, should do following several electric type approval tests.
(1) lightning impulse voltage test or the test of 50% all-wave impulse flashover voltage
This test is mainly to measure the dielectric strength of discharging gap to lightning overvoltage; for playing the effect of protection insulator; its dielectric strength must be less than the impulse flashover voltage of insulator string, must not occur along all or part of insulator surface flashover under test voltage.
Press IEC standard-required, adopt 1.2/50 standard surge waveform to carry out lightning impulse simulation.Conventional probability is that 50% impulse flashover voltage value is its thunder and lightning dry withstand voltage, when test, can carry out with insertion or lifting and lowering method, its numerical value convert after standard ambient condition general 6 ~ 7 times to circuit phase voltage.
(2) power frequency wet flash-over voltage test
Press IEC standard-required, the artificial and voltage arithmetic mean that causes power frequency flashover that records of the standard that imposes on gap, also can take probability and be 50% flashover voltage.
Its objective is that examination gap tolerates the ability of operating voltage and switching overvoltage under circuit service conditions.Its numerical value general 4 ~ 4.5 times to circuit phase voltage.
(3) power frequency wet withstand voltage
Operating experience shows, the electric equipment that stands one minute AC voltage withstand test generally can ensure safe operation.In IEC standard, generally get the predetermined test voltage of 75% design, then maintain one minute and flashover does not occur or puncture as electric pressure of test voltage 2% speed rising taking per second, can peek.But also can maintain one minute for Starting Voltage by 95% of power frequency wet flash-over voltage, decline and 2% generally can tolerate if still there is flashover.
(4) radio interference test
Discharging gap is installed on insulator string, certainly will increase its radio interference.Be less than 46db by the requirement of Malaysian bidding documents 275kV insulator string.
(5) initial corona voltage test
Require to be analogous to other with electric pressure with altitude hardware corona tests requirement about the corona test of discharging gap.
The above; it is only preferred embodiment of the present utility model; be not the restriction of the utility model being made to any other form, and according to any amendment or equivalent variations that technical spirit of the present utility model is done, still belong to the utility model scope required for protection.
Claims (3)
1. a discharging gap apparatus, it is characterized in that: this discharging gap apparatus is positioned on ground insulator string, described discharging gap apparatus comprises the first securing member, the second securing member, the first fixed head, the second fixed head, top electrode and bottom electrode, described the first fixed head head end is fixed on the high-pressure side of ground insulator string by the first securing member, the end of the first fixed head connects the head end of top electrode, the end of described top electrode is for recruiting arc end, described the second fixed head head end is fixed on the low-pressure end of ground insulator string by the second securing member, the end of the second fixed head connects bottom electrode head end, the end arc end of described bottom electrode, described trick arc end and arc end leave space.
2. a kind of discharging gap apparatus according to claim 1, is characterized in that: described trick arc end is bending from lower to upper, and described arc end is bending from top to bottom.
3. a kind of discharging gap apparatus according to claim 1, is characterized in that: described trick arc end from lower to upper bending angle and arc end from top to bottom bending angle be 30-45 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420308655.0U CN204010854U (en) | 2014-06-11 | 2014-06-11 | A kind of discharging gap apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420308655.0U CN204010854U (en) | 2014-06-11 | 2014-06-11 | A kind of discharging gap apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN204010854U true CN204010854U (en) | 2014-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420308655.0U Active CN204010854U (en) | 2014-06-11 | 2014-06-11 | A kind of discharging gap apparatus |
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| CN (1) | CN204010854U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104008828A (en) * | 2014-06-11 | 2014-08-27 | 国家电网公司 | Discharge gap device |
| CN107800095A (en) * | 2016-08-29 | 2018-03-13 | 深圳带路科技有限公司 | A kind of ground wire energy-saving safe attachment means |
-
2014
- 2014-06-11 CN CN201420308655.0U patent/CN204010854U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104008828A (en) * | 2014-06-11 | 2014-08-27 | 国家电网公司 | Discharge gap device |
| CN104008828B (en) * | 2014-06-11 | 2017-06-20 | 国家电网公司 | A kind of discharging gap apparatus |
| CN107800095A (en) * | 2016-08-29 | 2018-03-13 | 深圳带路科技有限公司 | A kind of ground wire energy-saving safe attachment means |
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