CN104008828A - Discharge gap device - Google Patents

Discharge gap device Download PDF

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Publication number
CN104008828A
CN104008828A CN201410257130.3A CN201410257130A CN104008828A CN 104008828 A CN104008828 A CN 104008828A CN 201410257130 A CN201410257130 A CN 201410257130A CN 104008828 A CN104008828 A CN 104008828A
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China
Prior art keywords
fixed head
securing member
head
bottom electrode
fixed
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CN201410257130.3A
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Chinese (zh)
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CN104008828B (en
Inventor
陈希
戚力彦
冯学斌
缪晶晶
王道根
徐志磊
沈辉
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State Grid Corp of China SGCC
State Grid Zhejiang Electric Power Co Ltd
China Electric Power Research Institute Co Ltd CEPRI
Jiangdong Fittings Equipment Co Ltd
Original Assignee
State Grid Corp of China SGCC
State Grid Zhejiang Electric Power Co Ltd
China Electric Power Research Institute Co Ltd CEPRI
Jiangdong Fittings Equipment Co Ltd
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Application filed by State Grid Corp of China SGCC, State Grid Zhejiang Electric Power Co Ltd, China Electric Power Research Institute Co Ltd CEPRI, Jiangdong Fittings Equipment Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201410257130.3A priority Critical patent/CN104008828B/en
Publication of CN104008828A publication Critical patent/CN104008828A/en
Application granted granted Critical
Publication of CN104008828B publication Critical patent/CN104008828B/en
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Abstract

The invention discloses a discharge gap device. The discharge gap device is located on a ground wire insulator chain and comprises a first fastener, a second fastener, a first fixing board, a second fixing board, a top electrode and a bottom electrode, the head end of the first fixing board is fixed to the high-voltage end of the ground wire insulator chain through the first fastener, the tail end of the first fixing board is connected with the head end of the top electrode, the tail end of the top electrode is an arcing end, the head end of the second fixing board is fixed to the low-voltage end of the ground wire insulator chain through the second fastener, the tail end of the second fixing board is connected with the head end of the bottom electrode, the tail end of the bottom electrode is an arc striking end, and a gap is reserved between the arcing end and the arc striking end. The discharge gap device has the advantages that a gap between ground wire insulators is adjustable and can be adjusted if the gap does not meet the requirement for the ice melting or lightning protection performance of a ground wire in an actual project, and operation is convenient and rapid.

Description

A kind of discharging gap apparatus
Technical field
The present invention 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 overvoltage such as thunder and lightning, operations) to high-tension apparatuses such as bushings, effect is analogous to lightning arrester and overvoltage protection device.Discharging gap is comprised of two electrodes conventionally, one connects high-pressure side, another connects low-pressure end, between two electrodes, it is state of insulation, when 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.The insulator arc-over that it causes, line tripping and lightning surge intrusion electric substation damage electric equipment accident 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.
Summary of the invention
The invention provides a kind of discharging gap apparatus.
The technical solution used in the present invention 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 crooked from lower to upper, and described arc end is crooked from top to bottom.
Described trick arc end from lower to upper crooked angle and arc end from top to bottom crooked angle be 30-45 °.
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 3rd securing member, the 4th 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 is vertical fastening with the head end of top electrode by the 3rd securing member, 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 is vertical fastening with bottom electrode head end by the 4th securing member, described bottom electrode is started to tilt to be bent upwards by middle part, the bending section of described top electrode end and bottom electrode leaves space.
The angle of inclination at described bottom electrode middle part is 130-140 °.
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, described the first fixed head end and top electrode head end angulation, 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, described the second fixed head end is vertical with bottom electrode head end, described bottom electrode is started to tilt to be bent upwards by middle part, in the junction of the first fixed head and top electrode and the knee of bottom electrode, leave gap and at gap location, install most advanced and sophisticated.
The described very band iron that powers on is made, and bottom electrode is that round steel is made.
Between the first fixed head end and top electrode head end, angulation is 45-135 °, and the angle of the oblique bending at bottom electrode middle part is 130-140 °.
The invention has the beneficial effects as follows: 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, with certain gap, be arranged on insulator string end, simple in structure, easy to maintenance, in system, be used in conjunction with automatic reclosing, both can be by the timely ground connection of lightning current, again can be to user's uninterrupted power supply, thereby play, prevent insulator surface flashover, protect electric equipment, maintain the effect of the normal operation of circuit;
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;
During 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 guarantees correct operation next time;
At gap location, install an apiculus additional, to increase gap electrical field unevenness.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention 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.
Fig. 2 is the structural representation of embodiment 2, and wherein a is suspension string gold utensil, and b is strain insulator-string gold utensil.
Fig. 3 is the structural representation of embodiment 3, and wherein a is suspension string gold utensil, and b is strain insulator-string gold utensil.
Wherein: 1, the first securing member, the 2, second securing member, the 3, first fixed head, the 4, second fixed head, 5, top electrode, 6, bottom electrode, 7, ground insulator string, 8, recruit arc end, 9, arc end, the 10, the 3rd securing member, the 11, the 4th securing member, 12, tip.
Embodiment
In order to deepen the understanding of the present invention, below in conjunction with embodiment and accompanying drawing, to of the present invention, be described in further detail, this embodiment only, for explaining the present invention, does not form the restriction to protection scope of the present invention.
Embodiment 1
As shown in Figure 1, a kind of discharging gap apparatus of the present invention, 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 crooked from lower to upper, arc end 9 is crooked from top to bottom, recruit arc end 8 from lower to upper crooked angle and arc end 9 from top to bottom crooked angle be 30-45 °, during 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 guarantee correct operation next time.
It is effective lightning protection device, with certain gap, be arranged on insulator string end, simple in structure, easy to maintenance, in system, be used in conjunction with automatic reclosing, both can be by the timely ground connection of lightning current, again can be to user's uninterrupted power supply, thereby play, prevent insulator surface flashover, protect electric equipment, maintain the effect of the normal operation of circuit;
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.
Embodiment 2
As shown in Figure 2, a kind of discharging gap apparatus of the present invention, this discharging gap apparatus is positioned on ground insulator string 7, discharging gap apparatus comprises the first securing member 1, the second securing member 2, the 3rd securing member 10, the 4th securing member 11, 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 is vertical fastening with the head end of top electrode 5 by the 3rd securing member 10, 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 is vertical fastening with bottom electrode 6 head ends by the 4th securing member 11, bottom electrode 6 is started to tilt to be bent upwards by middle part, the bending section of top electrode 5 ends and bottom electrode 6 leaves space, the angle of inclination at bottom electrode 6 middle parts is 130-140 °, gap between top electrode 5 and bottom electrode 6 can be adjusted by the 3rd securing member 10 and the 4th securing member 11 respectively, during gap discharge, electric arc apart forms the most nearby at electrode, the electric arc that top, single 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, the minimum place of clearance distance can not burn, thereby guarantee correct operation next time.
It is effective lightning protection device, with certain gap, be arranged on insulator string end, simple in structure, easy to maintenance, in system, be used in conjunction with automatic reclosing, both can be by the timely ground connection of lightning current, again can be to user's uninterrupted power supply, thereby play, prevent insulator surface flashover, protect electric equipment, maintain the effect of the normal operation of circuit;
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.
Embodiment 3
As shown in Figure 3, a kind of discharging gap apparatus of the present invention, this discharging gap apparatus is positioned on ground insulator string 7, 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 first fixed head 3 ends and top electrode 5 head end angulations, 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 second fixed head 4 ends are vertical with bottom electrode 6 head ends, bottom electrode 6 is started to tilt to be bent upwards by middle part, in the first fixed head 3 and the junction of top electrode 5 and the knee of bottom electrode 6, leave gap and install most advanced and sophisticated 12 at gap location, top electrode 5 is made for band iron, bottom electrode 6 is made for round steel, between the first fixed head 1 end and top electrode 5 head ends, angulation is 45-135 °, the angle of the oblique bending at bottom electrode 6 middle parts is 130-140 °, at gap location, install an apiculus additional, to increase gap electrical field unevenness.
It is effective lightning protection device, with certain gap, be arranged on insulator string end, simple in structure, easy to maintenance, in system, be used in conjunction with automatic reclosing, both can be by the timely ground connection of lightning current, again can be to user's uninterrupted power supply, thereby play, prevent insulator surface flashover, protect electric equipment, maintain the effect of the normal operation of circuit;
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 discharging gap of the present invention 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, during 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 guarantee safe operation.In IEC standard, generally get the predetermined test voltage of 75% design, then take and per secondly as electric pressure of test voltage 2% speed rising, maintain one minute and flashover does not occur or puncture, can peek.But also can by power frequency wet flash-over voltage 95% for Starting Voltage maintains one minute, if still there is flashover, decline and 2% generally can tolerate.
(4) radio interference test
Discharging gap is installed on insulator string, certainly will increase its radio interference.Requirement by Malaysian bidding documents 275kV insulator string is less than 46db.
(5) initial corona voltage test
Corona test about discharging gap requires to be analogous to other with electric pressure with altitude hardware corona tests requirement.
The above, be only preferred embodiment of the present invention, is not the present invention to be done to the restriction of any other form, and according to any modification or equivalent variations that technical spirit of the present invention is done, still belongs to the present invention's scope required for protection.

Claims (8)

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 crooked from lower to upper, and described arc end is crooked 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 crooked angle and arc end from top to bottom crooked angle be 30-45 °.
4. 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 3rd securing member, the 4th 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 is vertical fastening with the head end of top electrode by the 3rd securing member, 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 is vertical fastening with bottom electrode head end by the 4th securing member, described bottom electrode is started to tilt to be bent upwards by middle part, the bending section of described top electrode end and bottom electrode leaves space.
5. a kind of discharging gap apparatus according to claim 4, is characterized in that: the angle of inclination at described bottom electrode middle part is 130-140 °.
6. 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, described the first fixed head end and top electrode head end angulation, 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, described the second fixed head end is vertical with bottom electrode head end, described bottom electrode is started to tilt to be bent upwards by middle part, in the junction of the first fixed head and top electrode and the knee of bottom electrode, leave gap and at gap location, install most advanced and sophisticated.
7. a kind of discharging gap apparatus according to claim 6, is characterized in that: described in the very band iron that powers on make, bottom electrode is that round steel is made.
8. a kind of discharging gap apparatus according to claim 6, is characterized in that: between the first fixed head end and top electrode head end, angulation is 45-135 °, and the angle of the oblique bending at bottom electrode middle part is 130-140 °.
CN201410257130.3A 2014-06-11 2014-06-11 A kind of discharging gap apparatus Active CN104008828B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106054006A (en) * 2016-08-08 2016-10-26 国网湖南省电力公司 Low-voltage arc starting and gap distance adjustable power-frequency freewheeling test apparatus and method
CN108254661A (en) * 2018-02-01 2018-07-06 南方电网科学研究院有限责任公司 Gold utensil sparking voltage test system and method
CN110082652A (en) * 2019-04-29 2019-08-02 电力规划总院有限公司 Choosing method, the device of arcing horn and insulator chain in overhead transmission line

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2687923Y (en) * 2004-02-12 2005-03-23 中国电力科学研究院 Overhead circuit parallel gap lightning protection device
CN2779573Y (en) * 2005-01-13 2006-05-10 中国电力科学研究院 Compound transformer neutral point protection gap
CN201075318Y (en) * 2007-06-19 2008-06-18 北京交通大学 Insulator string electrical arc discharge apparatus
CN201243186Y (en) * 2007-11-30 2009-05-20 北京市电力公司 Parallel connection clearance device for V-shaped insulator string of high-tension overhead line
CN203014162U (en) * 2012-12-13 2013-06-19 河南电力器材公司 500-kilovolt overhead transmission line suspension-string parallel-gap anti-lighting protective device
CN204010854U (en) * 2014-06-11 2014-12-10 国家电网公司 A kind of discharging gap apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2687923Y (en) * 2004-02-12 2005-03-23 中国电力科学研究院 Overhead circuit parallel gap lightning protection device
CN2779573Y (en) * 2005-01-13 2006-05-10 中国电力科学研究院 Compound transformer neutral point protection gap
CN201075318Y (en) * 2007-06-19 2008-06-18 北京交通大学 Insulator string electrical arc discharge apparatus
CN201243186Y (en) * 2007-11-30 2009-05-20 北京市电力公司 Parallel connection clearance device for V-shaped insulator string of high-tension overhead line
CN203014162U (en) * 2012-12-13 2013-06-19 河南电力器材公司 500-kilovolt overhead transmission line suspension-string parallel-gap anti-lighting protective device
CN204010854U (en) * 2014-06-11 2014-12-10 国家电网公司 A kind of discharging gap apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106054006A (en) * 2016-08-08 2016-10-26 国网湖南省电力公司 Low-voltage arc starting and gap distance adjustable power-frequency freewheeling test apparatus and method
CN106054006B (en) * 2016-08-08 2019-04-05 国网湖南省电力公司 The low pressure starting the arc and the adjustable power frequency continued flow experimental rig of clearance distance and test method
CN108254661A (en) * 2018-02-01 2018-07-06 南方电网科学研究院有限责任公司 Gold utensil sparking voltage test system and method
CN110082652A (en) * 2019-04-29 2019-08-02 电力规划总院有限公司 Choosing method, the device of arcing horn and insulator chain in overhead transmission line
CN110082652B (en) * 2019-04-29 2021-09-03 电力规划总院有限公司 Selection method and device for arcing horn and insulator string in overhead transmission line

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