CN104007294B - Overhead line parameter measurement wiring device - Google Patents
Overhead line parameter measurement wiring device Download PDFInfo
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- CN104007294B CN104007294B CN201410250630.4A CN201410250630A CN104007294B CN 104007294 B CN104007294 B CN 104007294B CN 201410250630 A CN201410250630 A CN 201410250630A CN 104007294 B CN104007294 B CN 104007294B
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- 238000005259 measurement Methods 0.000 title claims abstract description 41
- 238000006243 chemical reaction Methods 0.000 claims abstract description 5
- 230000003068 static effect Effects 0.000 claims description 35
- 230000005540 biological transmission Effects 0.000 claims description 21
- 238000000605 extraction Methods 0.000 claims 1
- 238000012360 testing method Methods 0.000 description 39
- 238000000034 method Methods 0.000 description 9
- 238000009413 insulation Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 238000000819 phase cycle Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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Abstract
The invention discloses an overhead line parameter measurement wiring device which comprises a three-phase high-voltage lead interface, a main diverter switch, three induced voltage lead-out measurement pile heads, three alternating current voltmeters, a direct current voltmeter, a direct current ammeter, three air switches and a rectifying device. The three-phase high-voltage lead interface is located on the rear side of a box body and used for leading in an overhead line. The main diverter switch is located above a device panel, and achieves diversion of overhead line induced voltage and direct current resistance parameter measurement functions. The induced voltage lead-out measurement pile heads are located on the left side of the device, and can be externally connected with an instrument to achieve the measurement function. The alternating current voltmeters are used for measuring the induced voltage. The direct current voltmeter and the direct current ammeter are used for measuring and obtaining the voltage and current in a direct current resistance measurement loop. The air switches achieve selection of the direct current measurement loop. The rectifying device achieves conversion between the alternating current and the direct current, and therefore direct current resistance measurement is achieved. The overhead line parameter measurement wiring device can solve the problem that wiring and replacement are tedious in the prior art.
Description
Technical field:
The present invention relates to a kind of overhead transmission line parameter measurement termination.
Background technology:
Newly-built and reconstruction high-tension overhead line before being taken into use, need to check line insulation situation, verification phase place, measurement
D.C. resistance and various power frequency parameter value, using as computing system short circuit current, reckoning trend distribution, relay protection setting
Realistic basis with work such as the selections of the reasonable method of operation.
In prior art, tester typically adopts the manual mode of connection, realizes the company of test equipment and tested transmission line of electricity
Connect.Induced voltage in current overhead transmission line parameter experiment project, nuclear phase, insulation resistance and direct current resistance m easurem ent link
Connect thread-changing operation excessively loaded down with trivial details:
Before wiring, the testing crew of overhead transmission line head and end will first close earthing switch blade respectively, is then hung with overhead jointing clamp
Connect bare copper wire, then be strained and fixed with insulating tape, prepare test, be the personal safety of guarantee test personnel, prevent faradism to hinder
People, needs to wear insulating glove during whole test connection.
End is required to be grounded non-measured phase short circuit first during measurement induced voltage, to be measured mutually hanging；Head end three-phase is all hanging,
Then head and end pulls open earthing switch blade, and head end testing crew begins to use circuit tester to overlap three-phase measurement induced voltage successively simultaneously
Nuclear phase, reuses insulation resistance meter and carries out insulation measurement to three-phase after finishing.After above-mentioned experiment process finishes namely complete
Become induced voltage and the insulation measurement of a phase, the separate whether right of this phase head and end in measurement process, can have been checked simultaneously
Should.Need after the completion of one phase study to contact the replacing wiring of line end testing crew again, now end testing crew would generally be again
Close earthing switch blade, then carries out thread-changing again and repeats above-mentioned test operation.After the completion of three-phase test is equal, head and end closes again
Earthing switch blade, prepares D.C. resistance test.
It is desirable to line end testing crew will be earth-free for three-phase short circuit during measurement D.C. resistance；Head end testing crew will be to be measured
Biphase seal in DC loop.DC loop is usually to be concatenated as power supply by two Vehicular accumulator cells, then from power supply one end
Draw wire and concatenate the electric current that indicator type current meter is used as in measuring loop, then biphase (end is by measured again
Short circuit) concatenate into DC loop, another pole (starting to overlap again during test) being finally wired to accumulator battery is constituted
DC experiment loop.Before test, DC loop can not close, and wants head and end to pull open earthing switch blade, head end has one during test
Testing crew is overlapped accumulator at the trial manually and is constituted DC loop, can regard the switch as DC loop as, separately will
There is a testing crew to be responsible for wanting circuit tester overlap joint accumulator battery the two poles of the earth reading loop voltage, also need a testing crew to be responsible for reading
Fetch the reading of ammeter in road, the testing crew being responsible for record will record read test voltage, current value in time.On
After the completion of stating test, head end testing crew closes earthing switch blade, changes test connection, measures separately biphase electricity by above-mentioned steps
Pressure, current value, until after the completion of three groups of tests all, head and end closes earthing switch blade, and D.C. resistance test terminates.
Above-described connect thread-changing complex operation, tester needs directly contact p-wire in wiring.When tested power transmission line
When line-frequency induction voltage is relatively low in road, mild electrical shock can be produced to tester.But, when line-frequency induction voltage is higher,
Seriously tester can be wounded, even result in tester dead.
Although in prior art, can adopt and wear insulating glove and carry out wiring with the personal safety of guarantee test personnel.But absolutely
Edge glove are typically all thicker, tester put on insulating glove wiring very inconvenient it is easy to lead to wiring loosely, shadow
Ring process and the measuring accuracy of test.
Content of the invention:
For overcoming the defect of prior art, it is an object of the invention to provide a kind of overhead transmission line parameter measurement termination, can
Loaded down with trivial details to solve the problems, such as to connect thread-changing in prior art.Can achieve simultaneously testing crew and electrical body in process of the test effective every
From thus ensureing the personal safety of testing crew.
The present invention solves technical problem and adopts the following technical scheme that
Overhead transmission line parameter measurement termination, is provided as the junction box of termination body, in the side of described junction box
It is provided with three-phase high-voltage pin interfaces, another side is provided with induced voltage and draws measurement pile crown；
Main switching switch is provided with junction box's panel, described main switching switch has discoidal switch base and can switch
The switching knob rotating on pedestal, circumferentially spaced in described switch base is distributed with three groups of static contacts, every group of static contact
Comprise five fixed contacts equidistantly arranged；Three cunnings corresponding with described three groups of static contacts are interval with described switching knob
Block, each described slide block energy and can only simultaneously contacting with three described fixed contacts；
Three A.C. voltmeters, D.C. voltmeter, DC ammeter, three skies are additionally provided with junction box's panel
Air cock and a fairing；Overhead transmission line three-phase high-voltage line accesses junction box through described three-phase high-voltage pin interfaces, and every
3rd fixed contact of group static contact connects；5th fixed contact of every group of static contact connects described three alternating voltages respectively through lead
Table, three described induced voltages are drawn measurement pile crown and are connected with the 5th fixed contact of every group of static contact respectively through lead；
Described D.C. voltmeter, DC ammeter are connected in the DC loop of described fairing conversion, described DC loop
Two lines road be connected in parallel on described three air switches, in three groups of static contacts of switch base, the second static contact
First fixed contact is connected with the first air switch, and the first fixed contact of the two or three group of static contact is connected with the second air switch,
First fixed contact of the 3rd the first static contact is connected with the 3rd air switch.
Three-phase high-voltage pin interfaces are located on rear side of wiring casing body, for the introducing of overhead transmission line；Main switching switch is located at device
On panel, realize overhead transmission line induced voltage and the switching of D.C. resistance parameter measurement function；Induced voltage draws measurement stake
Head is located on the left of wiring casing, can realize measurement function by extension instrument；A.C. voltmeter is used for measuring induced voltage；Unidirectional current
Pressure table and DC ammeter are in order to measure voltage and electric current in direct current resistance m easurem ent loop；Air switch is realized DC measurement and is returned
The selection on road；The conversion of alternating current-direct current realized by fairing, in order to complete direct current resistance m easurem ent.
Compared with the prior art, beneficial effects of the present invention are embodied in:
The present invention can select corresponding measurement function by main switching switch, simplifies the frequency connecing thread-changing in process of the test manually
Rate, solves the problems, such as to connect thread-changing in prior art loaded down with trivial details.Meanwhile, all of the present invention connect thread-changing operation all in aerial line LUSHEN
Complete in number measurement termination, it is achieved that testing crew and the isolation of electrical body in process of the test, to test with effective guarantee
The personal safety of personnel.
Brief description:
Fig. 1 is the axonometric chart of apparatus of the present invention；Switch on-off principle block diagram based on Fig. 2；Switch the switch of switch based on Fig. 3
Knob schematic diagram；Fig. 4 is the internal circuit diagram of the present invention.
In figure label: 1 junction box, 2 three-phase high-voltage pin interfaces, 3 induced voltages draw measurement pile crown, and 4 main switchings switch,
5 switching knobs, 6 switch base, 7 slide blocks, 8 A.C. voltmeters, 9 D.C. voltmeters, 10 DC ammeter, 11 first
Air switch, 12 second air switches, 13 the 3rd air switches.
Below by way of specific embodiment, and the invention will be further described to combine accompanying drawing.
Specific embodiment:
Embodiment: combine Fig. 1, be provided as the junction box 1 of termination body, be provided with three in the posterior side of junction box 1
Individual hole, as three-phase high-voltage pin interfaces 2, junction box another side (left surface) is provided with three induced voltages and draws measurement
Pile crown 3；
Main switching switch 4 is provided with junction box's panel, Fig. 2, shown in 3, this main switching switch has discoidal switch base
Seat 6 and the switching knob 5 that can rotate in switch base, circumferentially spaced in switch base three group static contacts are distributed with,
Every group of static contact comprises five fixed contacts equidistantly arranged；Three groups of static contacts are numbered respectively and are i-th group, the i-th i group and the i-th ii
Group, 1. 2. 3. 4. 5. five fixed contacts of each group static contact are numbered respectively is, each group # is fixed contact 2., 4. is neutral,
Three slide blocks 7 corresponding with three groups of static contacts are interval with switching knob, each slide block energy and can only simultaneously with three fixed contacts
Contact, that is, three slide blocks can correspond to respectively turn on three groups of static contacts 1., 3. fixed contact or 3., 5. fixed contact.
Junction box's panel is additionally provided with three A.C. voltmeters, 9, DC ammeter 10 of 8, D.C. voltmeter,
Three air switches and a fairing；Overhead transmission line three-phase high-voltage line accesses junction box 1 through three-phase high-voltage pin interfaces 2,
It is connected with the 3rd fixed contact (numbering is 3.) of every group of static contact；5th fixed contact (numbering is 5.) of every group of static contact is through lead
Connect three A.C. voltmeters respectively, three induced voltages of junction box's left surface draw measurement pile crowns 3 through lead respectively with often
5th fixed contact (numbering is 5.) of group static contact connects.
Fig. 2, shown in 4, D.C. voltmeter 9, DC ammeter 10 are connected in the DC loop of fairing conversion, directly
The two lines road flowing back to road is connected in parallel on three air switches, in three groups of static contacts of switch base 6, the i-th the i-th i group stationary contacts
First fixed contact (numbering is 1.) of head is connected with the first air switch 11, and the first fixed contact of i-th i the i-th ii group static contact (is compiled
Number 1.) it is connected with the second air switch 12, the first fixed contact (numbering is 1.) and the 3rd air of i-th i-th group of static contact of ii
Switch 13 connection.
Shown in Fig. 3, realize principle in conjunction with what the main switching of the above analysis present invention switched: when switching knob is in x shelves,
Three slide blocks 7 are respectively at 2. 3. 4. on fixed contact of each group static contact, are now in neutral state；When switching knob is threaded to y
During shelves, 1. 2. 3. on fixed contact of three slide block 7 synchronous slides to each group static contact, realize 1. 3. turning on；When switching knob rotation
During to z shelves, 3. 4. 5. on fixed contact of three slide block 7 synchronous slides to each group static contact, realize 3. 5. turning on；
The work process of the present invention is as follows:
Preparation before test: first the earthing switch blade at overhead transmission line two ends to be measured closes, then in overhead transmission line first and last
Two ends are using overhead jointing clamp mounting bare copper wire by under three couplings and be fixed on insulating tape (keep the alternate mutually insulated of lead).
Then overhead transmission line head end lead is re-introduced in this measurement termination, a, b, c triple line respectively with three groups of static contacts
3rd fixed contact (numbering is 3.) connects.
During on-test, measurement induced voltage (simultaneously can also realize nuclear phase) first, now by overhead transmission line end to be measured
A phase is hanging, and the biphase short circuit of b, c is grounded；After the completion of said process, overhead transmission line head and end pulls open earthing switch blade, will fill
The main switching switching knob put is threaded to z shelves, reads three-phase induction voltage by three A.C. voltmeters and (now actually measures a line
Why induced voltage, read three-phase voltage, primarily to comparing with a phase voltage value, due to b, c phase line end
Ground connection, b, c voltage measured should be far smaller than the voltage that a phase records, it is achieved thereby that the nuclear phase of circuit, the i.e. a of head end
Corresponding with a phase of end), after having measured a phase induced voltage, measurement can be drawn by the induced voltage on the left of junction box
Pile crown measures the insulation resistance (external megameter measurement) of three-phase, and the biphase insulating resistance value of b, the c now recording also should be relatively
A phase less than normal, thus reaffirmed head and end phase sequence correspond to.The data of test data sheet only measures the sense of phase (a phase)
Answer magnitude of voltage and insulating resistance value, and whether this phase of head and end corresponds to.After the completion of by main switching switching knob be threaded to neutral gear,
Then end a, c short circuit is grounded by contact overhead transmission line end personnel, and b phase is hanging, repeats above step, completes b phase sense
Answer the measurement of voltage.The measurement of c phase operates in the same manner.
Induced voltage is measured, overhead transmission line end need to will be earth-free for three-phase short circuit, then head end testing crew is by this device
Main switching switching knob be threaded to y shelves, carry out direct current resistance m easurem ent, first air switch that closes first (ab air switch), read
Take voltage and the electric current of ab DC loop, be then turned off ab air switch, then second air switch that closes (bc air switch), read
The voltage of bc DC loop and electric current, followed by close the 3rd air switch (ca air switch), reads the electricity of ca DC loop
Pressure and electric current.
The use of this device leaves it at that, and head end closes earthing switch blade, and this device is taken off.
Claims (1)
1. overhead transmission line parameter measurement termination is it is characterised in that be provided as the junction box (1) of termination body,
It is provided with three-phase high-voltage pin interfaces (2) in the side of described junction box, another side is provided with induced voltage and draws measurement pile crown (3)；
Junction box's panel is provided with main switching switch (4), described main switching switch have discoidal switch base (6) and
The switching knob (5) that can rotate in switch base, circumferentially spaced in described switch base three group static contacts are distributed with,
Every group of static contact comprises five fixed contacts equidistantly arranged；It is interval with described switching knob and described three groups of static contacts pair
Three slide blocks (7) answered, each described slide block energy and can only simultaneously contacting with three described fixed contacts；
Three A.C. voltmeters (8), D.C. voltmeter (9), a DC ammeter are additionally provided with junction box's panel
(10), three air switches and a fairing；Overhead transmission line three-phase high-voltage line is through described three-phase high-voltage pin interfaces (2)
Access junction box (1), be connected with the 3rd fixed contact of every group of static contact respectively；5th fixed contact of every group of static contact is through lead
Connect described three A.C. voltmeters respectively, three described induced voltages extraction measurement pile crown (3) are quiet with every group respectively through lead
5th fixed contact of contact connects；
Described D.C. voltmeter (9), DC ammeter (10) are connected in the DC loop of described fairing conversion, institute
The two lines road stating DC loop is connected in parallel on described three air switches, in three groups of static contacts of switch base, the one the second
First fixed contact of group static contact is connected with the first air switch, the first fixed contact of the two or three group of static contact and the second air
Switch connects, and the first fixed contact of the 3rd the first static contact is connected with the 3rd air switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410250630.4A CN104007294B (en) | 2014-06-06 | 2014-06-06 | Overhead line parameter measurement wiring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410250630.4A CN104007294B (en) | 2014-06-06 | 2014-06-06 | Overhead line parameter measurement wiring device |
Publications (2)
| Publication Number | Publication Date |
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| CN104007294A CN104007294A (en) | 2014-08-27 |
| CN104007294B true CN104007294B (en) | 2017-02-01 |
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| CN201410250630.4A Expired - Fee Related CN104007294B (en) | 2014-06-06 | 2014-06-06 | Overhead line parameter measurement wiring device |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105785130A (en) * | 2016-03-21 | 2016-07-20 | 国家电网公司 | High-voltage line induced voltage and direct-current resistance measuring device |
| CN110794179B (en) * | 2019-11-27 | 2024-09-06 | 国网天津市电力公司 | Quick split-phase switcher for alternating current loop |
| CN111679113B (en) * | 2020-06-04 | 2022-08-19 | 贵州电网有限责任公司 | Auxiliary device for accessing secondary equipment to bus voltage without power failure |
| CN113608160A (en) * | 2021-08-02 | 2021-11-05 | 中国电力科学研究院有限公司 | Joint junction box for metering gateway electric energy meter |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2390288Y (en) * | 1999-07-05 | 2000-08-02 | 哈尔滨铁路局工业总公司齐齐哈尔电力机械厂 | Temporay hot-line connecting device for 10 KV overhead line |
| CN201974501U (en) * | 2011-02-21 | 2011-09-14 | 思源电气股份有限公司 | Fault indicator for overhead lines |
| CN103424666A (en) * | 2013-07-18 | 2013-12-04 | 广东电网公司电力科学研究院 | Overhead line fault indicator with voltage detection function |
| CN203849294U (en) * | 2014-06-06 | 2014-09-24 | 国家电网公司 | Overhead line parameter measuring line connecting device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05346416A (en) * | 1992-06-15 | 1993-12-27 | Hitachi Cable Ltd | Method and device for detecting disconnected strand of overhead wire |
-
2014
- 2014-06-06 CN CN201410250630.4A patent/CN104007294B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2390288Y (en) * | 1999-07-05 | 2000-08-02 | 哈尔滨铁路局工业总公司齐齐哈尔电力机械厂 | Temporay hot-line connecting device for 10 KV overhead line |
| CN201974501U (en) * | 2011-02-21 | 2011-09-14 | 思源电气股份有限公司 | Fault indicator for overhead lines |
| CN103424666A (en) * | 2013-07-18 | 2013-12-04 | 广东电网公司电力科学研究院 | Overhead line fault indicator with voltage detection function |
| CN203849294U (en) * | 2014-06-06 | 2014-09-24 | 国家电网公司 | Overhead line parameter measuring line connecting device |
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| CN104007294A (en) | 2014-08-27 |
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