CN205861806U - The low pressure starting the arc and clearance distance adjustable power frequency continued flow assay device - Google Patents
The low pressure starting the arc and clearance distance adjustable power frequency continued flow assay device Download PDFInfo
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- CN205861806U CN205861806U CN201620847822.8U CN201620847822U CN205861806U CN 205861806 U CN205861806 U CN 205861806U CN 201620847822 U CN201620847822 U CN 201620847822U CN 205861806 U CN205861806 U CN 205861806U
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- clearance distance
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- spheric electrode
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- 238000003556 assay Methods 0.000 title claims abstract description 14
- 239000012212 insulator Substances 0.000 claims abstract description 22
- 238000005259 measurement Methods 0.000 claims abstract description 19
- 239000000725 suspension Substances 0.000 claims abstract description 19
- 238000002474 experimental method Methods 0.000 claims abstract description 16
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000010931 gold Substances 0.000 claims abstract description 10
- 229910052737 gold Inorganic materials 0.000 claims abstract description 10
- 229910001220 stainless steel Inorganic materials 0.000 claims description 14
- 239000010935 stainless steel Substances 0.000 claims description 14
- 239000000758 substrate Substances 0.000 claims description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 238000012360 testing method Methods 0.000 abstract description 46
- 238000013461 design Methods 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 6
- 238000010998 test method Methods 0.000 abstract description 6
- 230000003247 decreasing effect Effects 0.000 abstract description 3
- 238000011156 evaluation Methods 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 238000010891 electric arc Methods 0.000 description 8
- 238000004458 analytical method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 230000015556 catabolic process Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000004870 electrical engineering Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000000752 ionisation method Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
This utility model relates to a kind of low pressure starting the arc and clearance distance adjustable power frequency continued flow assay device, including impulse voltage generator system, voltage measurement system, Luo-coil, suspension insulator, spark gap gapless section, upper spheric electrode, lower spheric electrode, striking fuse, industrial frequency experiment power-supply system.The air gap between upper and lower spheric electrode adds striking fuse, and power frequency side power-supply device is affected by Impulse Voltage to be remarkably decreased.Upper and lower spheric electrode is fixed on suspension insulator by anchor ear gold utensil, it is achieved that freely regulating of clearance distance.Use the concrete test method of this device: gap between upper and lower spheric electrode is adjusted, striking fuse is installed, export power-frequency voltage, output surge voltage, carries out 5 testing experiments, changes clearance distance, evaluation test result, determines that optimal clearance distance designs.Assay device and method shorten the test period, improve test efficiency, enhance test rigor, are effectively guaranteed the accuracy of test.
Description
Technical field
This utility model belongs to electrical engineering technical field, is specifically related to a kind of low pressure starting the arc and the adjustable work of clearance distance
Frequently operating duty cycle test device.
Background technology
Leakage conductor mostly is arrester with gaps, it is advantageous that under working voltage, and voltage, spark gap valve are born in gap
In the case of sheet life, and lightning arrester body damage, circuit can be properly functioning.But under lightning current effect, gap is hit
Wear, space electric arc can be formed.Lightning current is short for action time, and spark gap is quickly introduced into the earth, and arc channel is in power frequency simultaneously
Power frequency continued flow can be formed under voltage effect.If the energy that the energy that electric arc dissipates injects more than gap, power frequency continued flow is at electric current
Extinguish before zero crossing, but the temperature of arc gap is higher, there is the thermal ionization process of local, still there is between arc gap certain conducting
Road, is likely to occur under exchange recovers the effect of voltage and restrikes.Arc reignition can cause spark gap to absorb, and energy increases, valve block is sent out
Heat aggravation, causes the faults such as valve block infringement, line-to-ground tripping operation further.It is thus desirable to the power frequency continued flow to arrester with gaps
Situation carries out analysis of experiments.
At present in the power frequency continued flow test of arrester with gaps, pressuring method is surge voltage superposition power-frequency voltage, generally
Need relatively HI high impact voltage effect just can make gap breakdown, form electric arc.When power frequency side is transformator, protective loop requires height,
When power frequency side is electric capacity, inductor oscillating loop, and equipment needed thereby is various, parameter collocation is difficult, and the triggered time is difficult to control to.Survey at present
Whether extinguish simply by electric arc during examination and judge that lightning arrester gap setting is the most reasonable, it is judged that according to single, test device
Cannot freely regulate clearance distance, test crash then needs spark gap redesign to test again, test period length, work effect
Rate is low.
Utility model content
The purpose of this utility model is big for the power frequency continued flow difficulty of test of arrester with gaps, test equipment electric pressure
Require that high, conclusion (of pressure testing) analyzes the shortcomings such as simple, test period length, it is provided that a kind of low pressure starting the arc and the adjustable work of clearance distance
Frequently operating duty cycle test device and test method.
For solve above-mentioned technical problem, this utility model by the following technical solutions:
A kind of low pressure starting the arc and clearance distance adjustable power frequency continued flow assay device, including impulse voltage generator system,
Voltage measurement system, Luo-coil, suspension insulator, spark gap gapless section, upper spheric electrode, lower spheric electrode, striking are melted
Silk, industrial frequency experiment power-supply system, described voltage measurement system includes that electrode voltage measures system and bottom electrode voltage measurement system
System.Impulse voltage generator system is used for exporting surge voltage, and industrial frequency experiment power-supply system is used for exporting power-frequency voltage, Roche line
Circle is used for measuring arc current, and upper electrode voltage measures system and bottom electrode voltage measurement system is respectively used to measure upper and lower electricity
The current potential of pole.Spark gap gapless section is connected to below suspension insulator, and upper spheric electrode and lower spheric electrode are arranged on suspension type
On insulator, being welded with striking fuse in upper spheric electrode, striking fuse is positioned between spheric electrode and lower spheric electrode
In gap.
As improving further and supplementing for technique scheme, this utility model uses following measure.
Described impulse voltage generator system is made up of control system, charge power supply loop, sphere gap and protection system.
Described voltage measurement system is capacitive partial pressure device, measures system including upper electrode voltage and bottom electrode voltage is surveyed
Amount system, the waveform of measurement is kept to arc voltage waveform on the same time mutually.
Described suspension insulator is composite sheath insulator, a length of 1 ~ 5m of insulator, and described upper and lower spheric electrode is passed through
Anchor ear gold utensil is fixed on suspension insulator, and described spark gap gapless section is by aluminum wire and described suspension insulator lower end
Gold utensil is connected with lower spheric electrode.
Described anchor ear gold utensil includes right anchor ear, left anchor ear, bolt, nut and stainless steel substrates, and described stainless steel substrates is welded on
On right anchor ear, described stainless steel substrates having a manhole, described manhole is away from right anchor ear end.
Described upper and lower spheric electrode is that stainless steel ball is welded on screw rod, is fixed on described rustless steel by traveling nut
The manhole position of sheet, the distance between described upper and lower spheric electrode is freely adjustable.
Described striking fuse is the metal copper wire of 10 μm ~ 1mm, and under small area analysis, fusing forms electric arc.Described striking fuse contracts
Short clearance distance, in the case of power-frequency voltage does not punctures, surge voltage declines to a great extent, and needed for power frequency side, protection device is obvious
Reducing, starting the arc ability in the air gap rises, and success of the test rate rises.
Described industrial frequency experiment power-supply system is made up of control system, input power, transformator and protection system, described power frequency
The control system of experiment power supply system and the control system of described impulse voltage generator system are same set of system.
Using said apparatus to test the power frequency continued flow characteristic of spark gap, concrete method of testing is as follows:
Step 1: complete wiring；
Step 2: design according to spark gap external series gap, upper and lower spheric electrode clearance distance is adjusted.Installation striking is melted
Silk, between control striking fuse and lower spheric electrode, the frequency breakdown voltage of the air gap is more than power frequency output voltage；
Step 3: open all test systems, opens industrial frequency experiment power-supply system, controls the output of industrial frequency experiment power-supply system
Spark gap declared working condition working voltage；
Step 4: determine surge voltage size according to the distance between striking fuse and lower spheric electrode, obtains according to test
Empirical equation: surge voltage sizeU=30.09l 0.6043KV, in formulalFor the distance between striking fuse and lower spheric electrode,
cm.When power-frequency voltage reaches peak value, make impulse voltage generator system output cathode lightning impulse by control system
Voltage；
Step 5: carrying out several times (preferably 5 times) testing experiment, record test every time is measured by Luo-coil respectively
Arc currentiSystematic survey voltage is measured with upper electrode voltageU 1 , bottom electrode voltage measurement system measure voltageU 2 ；
Step 6: change clearance distance and test, repeat the measurement of step 2 ~ 5；
Step 7: evaluation test result., there is electric arc at power current the in 5 tests in basis for estimation: under identical gap
During zero passage, not blow-out then thinks that clearance distance setting is unsatisfactory for requirement；
Step 8: arrange, by arc current, voltage test under different gap for meeting the clearance distance of test requirements document
The relative analysis of result determines that optimal clearance distance designs.
Compared with prior art, the utility model has the advantage of:
1) this utility model is a kind of low pressure starting the arc and clearance distance adjustable power frequency continued flow assay device and test method,
The air gap between upper and lower spheric electrode adds striking fuse, effectively reduces the surge voltage of the air gap starting the arc
Level, power frequency side protection device parameter level declines, and protection equipment design is the simplest, and power frequency side power-supply device is by impact electricity
The impact of pressure effect is remarkably decreased.And starting the arc ability in the air gap rises, success of the test rate rises；
2) upper and lower spheric electrode is fixed on suspension insulator by anchor ear gold utensil, easy for installation, simple to operate, it is achieved
Freely regulating of clearance distance, can carry out the contrast test of different gap；
3) except being measured the arc current under the conditions of power frequency continued flow by Luo-coil in process of the test, measure simultaneously
Upper and lower spheric electrode voltage, to obtain arc voltage, obtains while arc voltage and electric current and is conducive to further analytical gap
Distance is for the impact of power frequency continued flow, and test method is the most reasonable；
4) process of the test has carried out the experimental test under 5 kinds of different gap, has enhanced test rigor, effectively ensure
The accuracy of test, improves the cogency of test.
Accompanying drawing explanation
Fig. 1 is this utility model assay device electrical block diagram.
Fig. 2 is anchor ear hardware fitting structure schematic diagram.
Fig. 3 is the structural representation that anchor ear gold utensil is fixed on suspension insulator.
Fig. 4 is clearance distance adjustable power frequency continued flow test method flow chart.
Marginal data: 1, impulse voltage generator system；2, voltage measurement system；21, upper electrode voltage measures system；
22, bottom electrode voltage measurement system；3, Luo-coil；4, suspension insulator；5, spark gap gapless section；6, upper spheric electrode；
7, lower spheric electrode；8, striking fuse；9, industrial frequency experiment power-supply system；10, right anchor ear；11, left anchor ear；12, screw rod；13, spiral shell
Cap；14, stainless steel substrates；141, manhole；15, movable nut.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, this utility model is described in further detail.
As it is shown in figure 1, this utility model is a kind of low pressure starting the arc and clearance distance adjustable power frequency continued flow assay device, bag
Include impulse voltage generator system 1, voltage measurement system 2, Luo-coil 3, suspension insulator 4, spark gap gapless section 5, on
Spheric electrode 6, lower spheric electrode 7, striking fuse 8, industrial frequency experiment power-supply system 9.
Described voltage measurement system 2 includes that electrode voltage measures system 21 and bottom electrode voltage measurement system 22, described
Voltage measurement system 2 uses capacitive partial pressure device, is quick on the draw impact and power-frequency voltage.
Described striking fuse 8 is welded in spheric electrode, and described striking fuse 8 is the metallic copper of diameter 10 μm ~ 1mm
Silk, under small area analysis, fusing forms electric arc.Described striking fuse 8 shortens clearance distance, in the power frequency of power frequency supply system output
In the case of voltage does not punctures, the surge voltage of the air gap starting the arc declines to a great extent, and power frequency side protection device parameter declines, protection
Equipment design is the simplest, and power frequency side power-supply device is affected by Impulse Voltage to be remarkably decreased.And the air gap is risen
Arc ability rises, and success of the test rate rises.
As shown in Figure 2,3, described upper spheric electrode 6 and lower spheric electrode 7 pass through anchor ear installation at suspension insulator 4
On.
Described anchor ear gold utensil includes right anchor ear 10, left anchor ear 11, screw rod 12, nut 13, stainless steel substrates 14, affiliated right anchor ear
10 and left anchor ear 11 use stainless steel, described stainless steel substrates 14 to be connected on right anchor ear 10 by welding procedure.Described stainless
Steel disc 14 has a manhole 141 for fixed electrode away from right anchor ear 10 end.
Described upper spheric electrode 6 and lower spheric electrode 7 are fixed on the manhole of stainless steel substrates 14 by traveling nut 15
On 141, clearance distance can be realized and freely regulate.
Use this utility model one low pressure starting the arc and clearance distance adjustable power frequency continued flow assay device, specifically test step
The most as shown in Figure 4:
Step 1: complete wiring；
Step 2: be adjusted gap between upper and lower spheric electrode, installs striking fuse；
Step 3: open all test systems, opens industrial frequency experiment power-supply system, exports power-frequency voltage；
Step 4: control impulse voltage generator system output surge voltage；
Step 5: carrying out 5 testing experiments, the arc current measured by Luo-coil tested in record every time respectivelyiWith upper
Electrode voltage measures systematic survey voltageU 1 , bottom electrode voltage measurement system measure voltageU 2 ；
Step 6: change clearance distance, repeats step 2 ~ step 5；
Step 7: evaluation test result；
Step 8: determine that optimal clearance distance designs.
In described step 2, design according to spark gap external series gap, upper and lower spheric electrode gap is adjusted.Striking is installed
During fuse, between control striking fuse and lower spheric electrode, the frequency breakdown voltage of the air gap is more than power frequency output voltage.
In described step 3, control industrial frequency experiment power-supply system output spark gap declared working condition working voltage.
In described step 4, when power-frequency voltage reaches peak value, make impulse voltage generator system defeated by control system
Go out positive polarity surge voltage.The empirical equation obtained according to test: surge voltage sizeU=30.09l 0.6043KV, in formulalFor drawing
Distance between arc fuse and lower spheric electrode, cm.
In described step 6, respectively under the clearance distance differing-5mm ,-10mm ,+5mm ,+10mm with design gaps distance
Test.
In described step 7, it is judged that foundation: under identical gap, 5 tests occur power frequency arc in electric current zero passage for the first time
Time not blow-out then think clearance distance arrange be unsatisfactory for requirement.
In described step 8, arrange, by arc current, electricity under different gap for meeting the clearance distance of test requirements document
The relative analysis of pressure result of the test determines that optimal clearance distance designs.
Lightning impulse voltage under air gap distance determines its clearance distance upper limit.After spark gap lost efficacy, clearance gap
From to bear 1.2 times of power frequency highest operating voltage, thereby determine that its clearance distance lower limit, be expressed as follows respectively:
U MLG50 ≥U 1mA +U d50 ,U d ≥1.2U n ,
WhereinU d50 It is struck by lightning 50% discharge voltage for gap,U MLG50 It is struck by lightning 50% discharge voltage design load for spark gap,U 1mA For
Spark gap 1mA reference voltage,U n For the highest power-frequency voltage of operation of power networks,U d Power-frequency voltage value is born for spark gap inefficacy post gap.
Meet above-mentioned in the case of, judge clearance distance by the blow-out time, and adopt according to arc voltage and current parameters
Arc motion emulation is carried out, reason with Mayr model (referring to document " study mechanism of novel injection air-flow lightning protection gap in arcing chamber ")
Opinion analyzes arc reignition and electric arc blow-out time situation, finally considers the blow-out time of experimental and theoretical analysis, takes the shortest
The air gap of blow-out time is ideal gap distance.
The above is only preferred implementation of the present utility model, and protection domain of the present utility model is not limited merely to
Above-described embodiment.To those of ordinary skill in the art, gained under without departing from this utility model technology concept thereof
To modifications and variations also should be regarded as protection domain of the present utility model.
Claims (5)
1. a low pressure starting the arc and clearance distance adjustable power frequency continued flow assay device, it is characterised in that include for exporting impact
The impulse voltage generator system of voltage, for exporting the industrial frequency experiment power-supply system of power-frequency voltage, for measuring arc current
Luo-coil, voltage measurement system and suspension insulator, spark gap gapless section is connected to below suspension insulator, upper spherical
Electrode and lower spheric electrode are arranged on suspension insulator, are welded with striking fuse in upper spheric electrode, and striking fuse is positioned at
In the gap of upper spheric electrode and lower spheric electrode, described voltage measurement system includes that electrode voltage measures system and bottom electrode
Voltage measurement system, is respectively used to measure the current potential of upper and lower electrode.
The low pressure starting the arc the most according to claim 1 and clearance distance adjustable power frequency continued flow assay device, it is characterised in that:
Described suspension insulator is composite sheath insulator, and described upper and lower spheric electrode is fixed on suspension insulator by anchor ear gold utensil
On, described spark gap gapless section is connected with described suspension insulator lower end gold utensil and described lower spheric electrode by wire.
The low pressure starting the arc the most according to claim 2 and clearance distance adjustable power frequency continued flow assay device, it is characterised in that:
Described anchor ear gold utensil includes right anchor ear, left anchor ear and stainless steel substrates, and described stainless steel substrates is welded on right anchor ear, described rustless steel
A manhole is being had away from right anchor ear end on sheet.
The low pressure starting the arc the most according to claim 3 and clearance distance adjustable power frequency continued flow assay device, it is characterised in that:
Described upper and lower spheric electrode is that stainless steel ball is welded on screw rod, is fixed on the circle of described stainless steel substrates by traveling nut
Lead to the hole site.
5., according to the low pressure starting the arc one of claim 1 ~ 4 Suo Shu and clearance distance adjustable power frequency continued flow assay device, it is special
Levy and be: described striking fuse is the metal copper wire of diameter 10 μm ~ 1mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620847822.8U CN205861806U (en) | 2016-08-08 | 2016-08-08 | The low pressure starting the arc and clearance distance adjustable power frequency continued flow assay device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620847822.8U CN205861806U (en) | 2016-08-08 | 2016-08-08 | The low pressure starting the arc and clearance distance adjustable power frequency continued flow assay device |
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Cited By (4)
| 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 |
| CN109444687A (en) * | 2018-11-15 | 2019-03-08 | 国网山西省电力公司大同供电公司 | A kind of 10kV power distribution network insulated conductor breakage caused by lightning stroke analogue test platform |
| CN112951831A (en) * | 2019-11-26 | 2021-06-11 | 补丁科技股份有限公司 | Anti-fuse one-time programmable memory cell and related array structure |
| WO2023077887A1 (en) * | 2021-11-05 | 2023-05-11 | 国网辽宁省电力有限公司电力科学研究院 | Power distribution network single-phase grounding fault arc self-extinguishing characteristic simulation apparatus and test method |
-
2016
- 2016-08-08 CN CN201620847822.8U patent/CN205861806U/en not_active Withdrawn - After Issue
Cited By (8)
| 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 |
| CN109444687A (en) * | 2018-11-15 | 2019-03-08 | 国网山西省电力公司大同供电公司 | A kind of 10kV power distribution network insulated conductor breakage caused by lightning stroke analogue test platform |
| CN109444687B (en) * | 2018-11-15 | 2020-11-06 | 国网山西省电力公司大同供电公司 | 10kV distribution network insulated conductor lightning stroke broken string simulation test platform |
| CN112951831A (en) * | 2019-11-26 | 2021-06-11 | 补丁科技股份有限公司 | Anti-fuse one-time programmable memory cell and related array structure |
| US11393547B2 (en) * | 2019-11-26 | 2022-07-19 | Piecemakers Technology, Inc. | Anti-fuse one-time programmable memory cell and related array structure |
| CN112951831B (en) * | 2019-11-26 | 2024-02-02 | 补丁科技股份有限公司 | Antifuse one-time programmable memory cell and related array structure |
| WO2023077887A1 (en) * | 2021-11-05 | 2023-05-11 | 国网辽宁省电力有限公司电力科学研究院 | Power distribution network single-phase grounding fault arc self-extinguishing characteristic simulation apparatus and test method |
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Granted publication date: 20170104 Effective date of abandoning: 20190405 |
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| AV01 | Patent right actively abandoned |