CN203643555U - Tour-inspection device for single-phase earth fault point of power distribution network - Google Patents
Tour-inspection device for single-phase earth fault point of power distribution network Download PDFInfo
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- CN203643555U CN203643555U CN201320892598.0U CN201320892598U CN203643555U CN 203643555 U CN203643555 U CN 203643555U CN 201320892598 U CN201320892598 U CN 201320892598U CN 203643555 U CN203643555 U CN 203643555U
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- 238000007689 inspection Methods 0.000 title claims abstract description 22
- 238000012360 testing method Methods 0.000 claims abstract description 6
- 238000004891 communication Methods 0.000 claims description 32
- 238000009413 insulation Methods 0.000 claims description 17
- 238000013500 data storage Methods 0.000 claims description 7
- 210000000352 storage cell Anatomy 0.000 claims description 7
- 238000005304 joining Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 2
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- 230000004807 localization Effects 0.000 description 4
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Abstract
The utility model discloses a tour-inspection device for a single-phase earth fault point of a power distribution network. The device comprises a frequency signal generator, a grounding wire hook, a hand-held signal detector and a data receiver, wherein the frequency signal generator provides current signals used for test to a tested single-phase line, the grounding wire hook is hung on the tested single-phase line and can move back and forth along the tested single-phase line, the hand-held signal detector moves back and forth along the tested single-phase line to detect the current values of the tested single-phase line at positions passed by, and the data receiver synchronously displays and records the current values detected by the hand-held signal detector; the grounding wire hook is connected with the signal output end of the frequency signal generator, and installed at the top end of a first insulating hand lever; and the hand-held signal detector is mounted at the top end of the a second insulating hand lever, and comprises a shell, a first circuit board and a split core type current transformer. The tour-inspection device of the utility model is simple in structure, use and operation, convenient to carry out wiring, good in using effect and safe and reliable in performance; and can determine the single-phase earth fault point simply, rapidly and accurately.
Description
Technical field
The utility model belongs to one-phase earthing failure in electric distribution network inspection technical field,, especially relate to a kind of one-phase earthing failure in electric distribution network point inspection device.
Background technology
Along with social development, when increasing day by day, electricity consumption also the quality of power supply is had higher requirement, and power supply reliability more and more receives the concern of power department and power consumer.Statistics demonstration, more than 95% power outage of electrical network is all caused by distribution fault.How fault can effectively detect rapidly fault, and isolate after occurring, and restores electricity, and reduces fault effects tool and is of great significance.
Automatically blow-out when small current neutral grounding system generation instantaneity earth fault, do not need to carry out localization of fault, and in the time there is permanent earth fault, because arc overvoltage may occur for it, threaten system insulation, therefore should be first circuit be disconnected to then trouble-shooting point as early as possible, and fault is got rid of, restore electricity.At present, localization of fault means be staff along line inspection, find trouble spot by visual inspection, this has not only expended a large amount of manpower and materials, and is difficult for finding the hidden faults such as such as insulator breakdown.Particularly for vast Rural Power Distribution Network, due to its profit of having inconvenient traffic, environmental facies are to badly, and localization of fault more needs to spend considerable time.For power department, artificial looking up the fault point had both increased staff's work difficulty, had also increased system maintenance expense.For user, extending power off time has greatly affected production and life, in the time of load peak, has a power failure and will cause great economic loss to user.Thereby research fast, accurately fault locator is conducive to improve power supply department and user's economic benefit.
Utility model content
Technical problem to be solved in the utility model is for above-mentioned deficiency of the prior art, a kind of one-phase earthing failure in electric distribution network point inspection device is provided, it is simple in structure, easy-to-connect, use is easy and simple to handle and result of use good, safe and reliable, can be easy, fast and accurately determine Single-phase Ground Connection Failure.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of one-phase earthing failure in electric distribution network point inspection device, it is characterized in that: comprise to the frequency of signal generator that injects test current signal in the tested uniline in power distribution network, hang on tested uniline and the clamp for ground wire that can move forward and backward along tested uniline, move forward and backward and the hand-held signal supervisory instrument that the current value in institute's tested uniline in shift position place is detected and the data sink that hand-held current value that signal supervisory instrument detects is carried out to simultaneous display and record along tested uniline, the signal output part of described clamp for ground wire and frequency of signal generator joins, described clamp for ground wire is arranged on insulation hand lever one top, described hand-held signal supervisory instrument is arranged on insulation hand lever two tops, described hand-held signal supervisory instrument comprises shell, is arranged on the electronic circuit board one in described shell and is fixed on the split core type current transformer that the current value in the tested uniline in Qie Dui present position place, described shell top carries out real-time detection, the signal acquisition circuit that is provided with data processor one on described electronic circuit board one, join with split core type current transformer and the wireless communication module one joining with data processor one, described signal acquisition circuit and data processor one join, described data sink comprises data processor two and the parameter set unit, display unit, wireless communication module two and the data storage cell that join with data processor two respectively, between described data processor one and data processor two, carries out two-way communication by wireless communication module one and wireless communication module two.
Above-mentioned a kind of one-phase earthing failure in electric distribution network point inspection device, it is characterized in that: described data sink also comprises external shell and is arranged on the electronic circuit board two in described case body, described data processor two, wireless communication module two and data storage cell are all laid on described electronic circuit board two, and described parameter set unit and display unit are all laid on described external shell.
Above-mentioned a kind of one-phase earthing failure in electric distribution network point inspection device, is characterized in that: the current value of described frequency of signal generator institute output current signal is that 40mA ± 5mA and its frequency are 22Hz ± 2Hz.
Above-mentioned a kind of one-phase earthing failure in electric distribution network point inspection device, is characterized in that: described external shell is hand-held housing.
Above-mentioned a kind of one-phase earthing failure in electric distribution network point inspection device, is characterized in that: described insulation hand lever one and insulation hand lever two are link rod.
Above-mentioned a kind of one-phase earthing failure in electric distribution network point inspection device, is characterized in that: described data sink is technical grade PDA.
Above-mentioned a kind of one-phase earthing failure in electric distribution network point inspection device, is characterized in that: described wireless communication module one and wireless communication module two are Wifi wireless communication module.
The utility model compared with prior art has the following advantages:
1, simple in structure, reasonable in design, circuit connection is convenient and input cost is low, and processing and fabricating is convenient.
2, volume is little, lightweight and easy to carry.
3, use easy and simple to handle and result of use good, practical value is high, when after uniline generation singlephase earth fault, first in tested uniline, inject test current signal by frequency of signal generator, adopt again hand-held signal supervisory instrument to move from front to back along tested uniline, in moving process, by hand-held signal supervisory instrument, the current value in institute's tested uniline in shift position place is detected and by detected current value synchronous driving to data sink, the corresponding current value that hand-held signal supervisory instrument is transmitted of data sink carries out simultaneous display, and patrol officer observes the current value of tested uniline position in hand-held signal supervisory instrument moving process by data sink, and the position that before and after finding out on tested uniline, both sides electric current is undergone mutation, and this position is just Single-phase Ground Connection Failure.Thereby, can determine easy, fast Single-phase Ground Connection Failure by the utility model, reduce the blindness of localization of fault, shortened failure detection time, and positioning result is accurate; Meanwhile, operating personnel are away from high pressure, and patrolman operates by insulating bar on ground, safe and reliable.In addition, in the time that circuit normally moves, the load current that hand-held signal supervisory instrument can detection line.
In sum, the utility model is simple in structure, easy-to-connect, use is easy and simple to handle and result of use good, safe and reliable, can easy, fast and accurately determine Single-phase Ground Connection Failure, reduce power distribution line maintenance personnel's labour intensity, convenient and swift and flexible operation.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Brief description of the drawings
Fig. 1 is use state reference map of the present utility model.
Fig. 2 is the schematic block circuit diagram of the utility model hand-held signal supervisory instrument and data sink.
Description of reference numerals:
1-tested uniline; 2-1-frequency of signal generator; 2-2-clamp for ground wire;
2-3-insulation hand lever one; 3-hand-held signal supervisory instrument;
3-1-split core type current transformer; 3-2-insulation hand lever two;
3-3-data processor one; 3-4-signal acquisition circuit;
3-5-wireless communication module one; 4-data sink;
4-1-data processor two; 4-2-parameter set unit; 4-3-display unit;
4-4-wireless communication module two; 4-5-data storage cell.
Embodiment
As Fig. 1, shown in Fig. 2, the utility model comprises to the frequency of signal generator 2-1 that injects test current signal in the tested uniline 1 in power distribution network, hang on tested uniline 1 and the clamp for ground wire 2-2 that can move forward and backward along tested uniline 1, move forward and backward and the hand-held signal supervisory instrument 3 that the current value in the tested uniline 1 in shift position place of institute is detected and the data sink 4 that hand-held signal supervisory instrument 3 current value that detects is carried out to simultaneous display and record along tested uniline 1, the signal output part of described clamp for ground wire 2-2 and frequency of signal generator 2-1 joins, described clamp for ground wire 2-2 is arranged on insulation hand lever one 2-3 top.Described hand-held signal supervisory instrument 3 is arranged on insulation hand lever two 3-2 tops, described hand-held signal supervisory instrument 3 comprises shell, the current value that is arranged on the electronic circuit board one in described shell and be fixed in the tested uniline 1 in Qie Dui present position place, described shell top carries out the split core type current transformer 3-1 detecting in real time, on described electronic circuit board one, be provided with data processor one 3-3, the signal acquisition circuit 3-4 joining with split core type current transformer 3-1 and wireless communication module one 3-5 joining with data processor one 3-3, described signal acquisition circuit 3-4 and data processor one 3-3 join.Described data sink 4 comprises data processor two 4-1 and parameter set unit 4-2, the display unit 4-3, wireless communication module two 4-4 and the data storage cell 4-5 that join with data processor two 4-1 respectively, between described data processor one 3-3 and data processor two 4-1, carries out two-way communication by wireless communication module one 3-5 and wireless communication module two 4-4.
In the present embodiment, described data sink 4 also comprises external shell and is arranged on the electronic circuit board two in described case body, described data processor two 4-1, wireless communication module two 4-4 and data storage cell 4-5 are all laid on described electronic circuit board two, and described parameter set unit 4-2 and display unit 4-3 are all laid on described external shell.
In the present embodiment, described external shell is hand-held housing.
When actual use, described external shell also can adopt the housing of other type.
In the present embodiment, described data sink 4 is technical grade PDA.
When actual use, that is to say to injecting non-power-frequency current signal in tested uniline 1 by described frequency of signal generator 2-1, described frequency of signal generator 2-1 institute output current signal is non-power-frequency current signal.The current value of described frequency of signal generator 2-1 institute output current signal is that 40mA ± 5mA and its frequency are 22Hz ± 2Hz.
In the present embodiment, the current value of described frequency of signal generator 2-1 institute output current signal is that 40mA and its frequency are 22Hz.When actual use, can according to specific needs, current value and the frequency of frequency of signal generator 2-1 institute output current signal be adjusted accordingly.
In the present embodiment, described insulation hand lever one 2-3 and insulation hand lever two 3-2 are link rod.
When actual use, described insulation hand lever one 2-3 and insulation hand lever two 3-2 also can adopt the insulativity rod member of other type.
In the present embodiment, described wireless communication module one 3-5 and wireless communication module two 4-4 are Wifi wireless communication module.
When actual use, described wireless communication module one 3-5 and wireless communication module two 4-4 also can adopt the wireless communication module of other type.
In actual use procedure, when tested uniline 1 occurs after singlephase earth fault, first in tested uniline 1, inject test current signal by frequency of signal generator 2-1, adopt again hand-held signal supervisory instrument 3 to move from front to back along tested uniline 1, and in moving process, by hand-held signal supervisory instrument 3, the current value in the tested uniline 1 in shift position place of institute is detected and by detected current value synchronous driving to data sink 4, the current value that described data sink 4 transmits hand-held signal supervisory instrument 3 carries out simultaneous display, and patrol officer observes the current value of tested uniline 1 position in hand-held signal supervisory instrument 3 moving process by data sink 4, and the position that before and after finding out on tested uniline 1, both sides electric current is undergone mutation, and this position is just Single-phase Ground Connection Failure.
The above; it is only preferred embodiment of the present utility model; not the utility model is imposed any restrictions; every any simple modification of above embodiment being done according to the utility model technical spirit, change and equivalent structure change, and all still belong in the protection domain of technical solutions of the utility model.
Claims (7)
1. an one-phase earthing failure in electric distribution network point inspection device, it is characterized in that: comprise to the frequency of signal generator (2-1) that injects test current signal in the tested uniline (1) in power distribution network, hang over the clamp for ground wire (2-2) that tested uniline (1) is upper and can move forward and backward along tested uniline (1), the hand-held signal supervisory instrument (3) that moves forward and backward and the current value in the tested uniline in shift position place of institute (1) is detected along tested uniline (1) and the data sink (4) that hand-held signal supervisory instrument (3) current value that detects is carried out to simultaneous display and record, described clamp for ground wire (2-2) joins with the signal output part of frequency of signal generator (2-1), described clamp for ground wire (2-2) is arranged on insulation hand lever one (2-3) top, described hand-held signal supervisory instrument (3) is arranged on insulation hand lever two (3-2) top, described hand-held signal supervisory instrument (3) comprises shell, the current value that is arranged on the electronic circuit board one in described shell and be fixed in the described shell top tested uniline in Qie Dui present position place (1) carries out the split core type current transformer (3-1) detecting in real time, on described electronic circuit board one, be provided with data processor one (3-3), the signal acquisition circuit (3-4) joining with split core type current transformer (3-1) and the wireless communication module one (3-5) joining with data processor one (3-3), described signal acquisition circuit (3-4) joins with data processor one (3-3), described data sink (4) comprises data processor two (4-1) and the parameter set unit (4-2), display unit (4-3), wireless communication module two (4-4) and the data storage cell (4-5) that join with data processor two (4-1) respectively, between described data processor one (3-3) and data processor two (4-1), carries out two-way communication by wireless communication module one (3-5) and wireless communication module two (4-4).
2. according to a kind of one-phase earthing failure in electric distribution network point inspection device claimed in claim 1, it is characterized in that: described data sink (4) also comprises external shell and is arranged on the electronic circuit board two in described case body, described data processor two (4-1), wireless communication module two (4-4) and data storage cell (4-5) are all laid on described electronic circuit board two, and described parameter set unit (4-2) and display unit (4-3) are all laid on described external shell.
3. according to a kind of one-phase earthing failure in electric distribution network point inspection device described in claim 1 or 2, it is characterized in that: the current value of described frequency of signal generator (2-1) institute output current signal is that 40mA ± 5mA and its frequency are 22Hz ± 2Hz.
4. according to a kind of one-phase earthing failure in electric distribution network point inspection device claimed in claim 2, it is characterized in that: described external shell is hand-held housing.
5. according to a kind of one-phase earthing failure in electric distribution network point inspection device described in claim 1 or 2, it is characterized in that: described insulation hand lever one (2-3) and insulation hand lever two (3-2) are link rod.
6. according to a kind of one-phase earthing failure in electric distribution network point inspection device claimed in claim 4, it is characterized in that: described data sink (4) is technical grade PDA.
7. according to a kind of one-phase earthing failure in electric distribution network point inspection device described in claim 1 or 2, it is characterized in that: described wireless communication module one (3-5) and wireless communication module two (4-4) are Wifi wireless communication module.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320892598.0U CN203643555U (en) | 2013-12-31 | 2013-12-31 | Tour-inspection device for single-phase earth fault point of power distribution network |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320892598.0U CN203643555U (en) | 2013-12-31 | 2013-12-31 | Tour-inspection device for single-phase earth fault point of power distribution network |
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| CN203643555U true CN203643555U (en) | 2014-06-11 |
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| CN201320892598.0U Expired - Lifetime CN203643555U (en) | 2013-12-31 | 2013-12-31 | Tour-inspection device for single-phase earth fault point of power distribution network |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106646119A (en) * | 2016-11-24 | 2017-05-10 | 国网山东省电力公司成武县供电公司 | Ground fault search instrument, and ground fault point search method and system |
| CN106771881A (en) * | 2017-01-23 | 2017-05-31 | 国网山东省电力公司德州供电公司 | The method and device of Single-phase Ground Connection Failure is positioned in star-like three-phase ungrounded power systems |
| CN108627735A (en) * | 2018-07-26 | 2018-10-09 | 浙江德辉电力安装工程有限公司 | A kind of fast accurate searches the method and detection device of Single-phase Ground Connection Failure |
-
2013
- 2013-12-31 CN CN201320892598.0U patent/CN203643555U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106646119A (en) * | 2016-11-24 | 2017-05-10 | 国网山东省电力公司成武县供电公司 | Ground fault search instrument, and ground fault point search method and system |
| CN106646119B (en) * | 2016-11-24 | 2019-05-10 | 国网山东省电力公司成武县供电公司 | Earth fault searches instrument, earth fault lookup method and system |
| CN106771881A (en) * | 2017-01-23 | 2017-05-31 | 国网山东省电力公司德州供电公司 | The method and device of Single-phase Ground Connection Failure is positioned in star-like three-phase ungrounded power systems |
| CN108627735A (en) * | 2018-07-26 | 2018-10-09 | 浙江德辉电力安装工程有限公司 | A kind of fast accurate searches the method and detection device of Single-phase Ground Connection Failure |
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