CN108627735A - A kind of fast accurate searches the method and detection device of Single-phase Ground Connection Failure - Google Patents

A kind of fast accurate searches the method and detection device of Single-phase Ground Connection Failure Download PDF

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Publication number
CN108627735A
CN108627735A CN201810833726.1A CN201810833726A CN108627735A CN 108627735 A CN108627735 A CN 108627735A CN 201810833726 A CN201810833726 A CN 201810833726A CN 108627735 A CN108627735 A CN 108627735A
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CN
China
Prior art keywords
detection device
ground connection
searches
fast accurate
connection failure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201810833726.1A
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Chinese (zh)
Inventor
李德水
张新明
汪华燕
徐金松
汪华玲
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Dehui Power Installation Engineering Co Ltd
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Zhejiang Dehui Power Installation Engineering Co Ltd
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Publication date
Application filed by Zhejiang Dehui Power Installation Engineering Co Ltd filed Critical Zhejiang Dehui Power Installation Engineering Co Ltd
Priority to CN201810833726.1A priority Critical patent/CN108627735A/en
Publication of CN108627735A publication Critical patent/CN108627735A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Abstract

The invention discloses methods and detection device that a kind of fast accurate searches Single-phase Ground Connection Failure, after there is singlephase earth fault, the either switch on main line is disconnected first, the resistance for disconnecting switch both sides is measured with detection device, if a side resistance is smaller, is continued selection disconnection switch in the range of the side and is measured with detection device, until determining branch line where singlephase earth fault, either switch is disconnected on the branch line again, is repeated the above steps, until determining the minimum zone where fault point.Present invention reduces the times of processing singlephase earth fault, efficiently solve the problems, such as that singlephase earth fault searches difficult, processing time length, not only customer outage hours are shortened, but also improves work efficiency, reduce examination air-supply danger, are suitable for region of the Rural Electric Power circuit compared with dispersion.

Description

A kind of fast accurate searches the method and detection device of Single-phase Ground Connection Failure
Technical field
The present invention relates to technical field of electric power detection, specially a kind of method of fast accurate lookup Single-phase Ground Connection Failure And detection device.
Background technology
Single-phase earthing is 10kV (35kV) single-phase earthing of small current earthing system, and singlephase earth fault is that distribution system is most normal The failure seen mostly occurs in moist, rainy weather.Due on screen of trees, distribution line insulator it is single-phase breakdown, single-phase wire break and Caused by the factors such as toy harm.Single-phase earthing not only affects the normal power supply of user, but also there may be excessively electric Pressure, burns out equipment, or even cause phase fault and expand accident.The processing method for being familiar with earth fault is very heavy to operator on duty It wants.Failure results in the decline of customer power supply reliability, and economic loss is caused to user.Therefore, shorten processing single-phase earthing The time of failure restores have realistic meaning to customer power supply as early as possible.
Singlephase earth fault proximity switch tripping or will not fall quick-fried molten, be not easy to determine failure point range.Therefore, it is necessary to complete Line, which is maked an inspection tour, searches fault point, and it is longer to search the time.Single-phase Ground Connection Failure usually has concealment, and completely making an inspection tour still can not send out Existing fault point needs to carry out trying to send with dispatch contact.It is sent by examination, gradually determines fault point location, it is therefore desirable to improve Detection method improves detection efficiency.
Invention content
The purpose of the present invention is to provide method and detection device that a kind of fast accurate searches Single-phase Ground Connection Failure, solutions The problem of having determined proposed in background technology.
To achieve the above object, the present invention provides the following technical solutions:A kind of fast accurate lookup Single-phase Ground Connection Failure Method, after there is singlephase earth fault, first disconnect main line on either switch, with detection device measure disconnect switch The resistance of both sides continues selection disconnection switch in the range of the side and is measured with detection device if a side resistance is smaller, until Branch line where determining singlephase earth fault, then either switch is disconnected on the branch line, it repeats the above steps, until determining fault point The minimum zone at place.
As a kind of preferred embodiment of the present invention, the application method that detection device measures is to hang detection device upper end It is connected on circuit to be detected, lower end ground connection reads the reading of ohmmeter.
A kind of fast accurate searches the detection device of Single-phase Ground Connection Failure, and single-phase connect is searched for above-mentioned fast accurate The method of earth fault point, including hook, insulating bar, ohmmeter, conducting wire, ground pin, hook are set to the top of insulating bar, hang Hook is that an annulus with opening is hook-shaped, and insulating bar is connect by conducting wire with ohmmeter, and ohmmeter connects ground pin by conducting wire, Ground pin is connected at the ground connection in power circuit.
As a kind of preferred embodiment of the present invention, it is plastic shell outside insulating bar, is internally provided with resistor rod, resistance Stick resistance value is more than 1.5 megaohms.
As a kind of preferred embodiment of the present invention, resistor rod is connected for several fixed value resistances.
As a kind of preferred embodiment of the present invention, resistor rod bottom is equipped with current limiter.
As a kind of preferred embodiment of the present invention, hook is equipped with high-voltage AC electroscope.
As a kind of preferred embodiment of the present invention, high-voltage AC electroscope voltage class is 10Kv.
As a kind of preferred embodiment of the present invention, hook may be configured as right angle hook.
Compared with prior art, beneficial effects of the present invention are as follows:The time of processing singlephase earth fault is shortened, effectively It solves the problems, such as that singlephase earth fault searches difficult, processing time length, not only shortens customer outage hours, but also improve work Efficiency reduces examination air-supply danger, is suitable for region of the Rural Electric Power circuit compared with dispersion.
Description of the drawings
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention, Objects and advantages will become more apparent upon:
Fig. 1 is the schematic diagram for the method that a kind of fast accurate of the present invention searches Single-phase Ground Connection Failure;
Fig. 2 is the structural schematic diagram for the detection device that a kind of fast accurate of the present invention searches Single-phase Ground Connection Failure;
Fig. 3 is the insulating bar structural schematic diagram for the detection device that a kind of fast accurate of the present invention searches Single-phase Ground Connection Failure;
In figure:Hook 1, insulating bar 2, ohmmeter 3, conducting wire 4, ground pin 5, resistor rod 6, plastic shell 7, fixed value resistance 8, limit Flow device 9, high-voltage AC electroscope 10.
Specific implementation mode
To make the technical means, the creative features, the aims and the efficiencies achieved by the present invention be easy to understand, with reference to Specific implementation mode, the present invention is further explained.
Referring to Fig. 1, the present invention provides a kind of technical solution:A kind of fast accurate searches the side of Single-phase Ground Connection Failure Method disconnects the either switch on main line first after there is singlephase earth fault, is measured with detection device and disconnects switch both sides Resistance, if a side resistance is smaller, continue in the range of the side selection disconnect switch measured with detection device, until determine Branch line where singlephase earth fault, then either switch is disconnected on the branch line, it repeats the above steps, until where determining fault point Minimum zone.
The application method that wherein detection device measures is that detection device upper end is articulated on circuit to be detected, lower termination Ground reads the reading of ohmmeter.
The time that processing singlephase earth fault is shortened using the detection method efficiently solves singlephase earth fault lookup Difficult, processing time length problem, not only shortens customer outage hours, but also improves work efficiency, reduces examination air-supply danger, is applicable in In region of the Rural Electric Power circuit compared with dispersion.
Fig. 2, Fig. 3 are please referred to, detection method to realize the present invention devises a kind of fast accurate lookup single-phase earthing event Hinder the detection device of point, including hook, insulating bar, ohmmeter, conducting wire, ground pin, hook is set to the top of insulating bar, hangs Hook is that an annulus with opening is hook-shaped, and insulating bar is connect by conducting wire with ohmmeter, and ohmmeter connects ground pin by conducting wire, Ground pin is connected at the ground connection in power circuit, and the detection device of this programme has easy to carry, easy to assembly, cost It is low, the good feature of safety coefficient.
It is plastic shell outside insulating bar, is internally provided with resistor rod, resistor rod resistance value is more than 1.5 megaohms, and human body is born Voltage security voltage range is 36V and hereinafter, since human body resistance value is about 1700 Europe, and the resistance value of resistor rod is arranged, it should So that there is the case where circuit electrification, human body bears voltage and is not higher than 12V, and line voltage distribution is 10Kv, therefore resistor rod resistance Value is 1700*10Kv/12V-1700=1.415 megaohm, it is contemplated that special circumstances, resistor rod resistance value are set greater than 1.5 megaohms.
Resistor rod is the series connection of several fixed value resistances, and concatenated form can make cost-effective, can also accurately control resistance value.
Resistor rod bottom is equipped with current limiter, and current limiter can limit electric current, and the safety of power worker is protected when electric current is excessive.
Hook is equipped with high-voltage AC electroscope, and high-voltage AC electroscope voltage class is 10Kv, can detect electric current.
Hook may be configured as right angle hook, be adapted to different power circuit environment.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention, for this field skill For art personnel, it is clear that invention is not limited to the details of the above exemplary embodiments, and without departing substantially from the present invention spirit or In the case of essential characteristic, the present invention can be realized in other specific forms.Therefore, in all respects, should all incite somebody to action Embodiment regards exemplary as, and is non-limiting, the scope of the present invention by appended claims rather than on state Bright restriction, it is intended that including all changes that come within the meaning and range of equivalency of the claims in the present invention It is interior.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art The other embodiment being appreciated that.

Claims (9)

1. a kind of method that fast accurate searches Single-phase Ground Connection Failure, it is characterised in that:It is first after there is singlephase earth fault The either switch on main line is first disconnected, the resistance for disconnecting switch both sides is measured with detection device, if a side resistance is smaller, Continue selection disconnection switch in the range of the side to be measured with detection device, until determine branch line where singlephase earth fault, then Either switch is disconnected on the branch line, is repeated the above steps, until determining the minimum zone where fault point.
2. the method that a kind of fast accurate according to claim 1 searches Single-phase Ground Connection Failure, it is characterised in that:It is described The application method that detection device measures is that detection device upper end is articulated on circuit to be detected, and lower end ground connection reads ohmmeter Reading.
3. a kind of fast accurate searches the detection device of Single-phase Ground Connection Failure, for realizing the fast accurate in claim 1 The method for searching Single-phase Ground Connection Failure, it is characterised in that:Including hook(1), insulating bar(2), ohmmeter(3), conducting wire(4)、 Ground pin(5), the hook(1)It is set to the insulating bar(2)Top, the hook(1)For an annulus with opening It is hook-shaped, the insulating bar(2)Pass through conducting wire(4)With ohmmeter(3)Connection, the ohmmeter(3)Pass through conducting wire(4)Connection ground connection Plug(5), the ground pin(5)It is connected at the ground connection in power circuit.
4. a kind of fast accurate according to claim 3 searches the detection device of Single-phase Ground Connection Failure, it is characterised in that: The insulating bar(2)Outside is plastic shell(7), it is internally provided with resistor rod(6), the resistor rod(6)Resistance value is more than 1.5 million Europe.
5. a kind of fast accurate according to claim 4 searches the detection device of Single-phase Ground Connection Failure, it is characterised in that: The resistor rod(6)For several fixed value resistances(8)Series connection.
6. a kind of fast accurate according to claim 5 searches the detection device of Single-phase Ground Connection Failure, it is characterised in that: The resistor rod(6)Bottom is equipped with current limiter(9).
7. a kind of fast accurate according to claim 3 searches the detection device of Single-phase Ground Connection Failure, it is characterised in that: The hook(1)It is equipped with high-voltage AC electroscope(10).
8. a kind of fast accurate according to claim 7 searches the detection device of Single-phase Ground Connection Failure, it is characterised in that: The high-voltage AC electroscope(10)Voltage class is 10Kv.
9. a kind of fast accurate according to claim 3 searches the detection device of Single-phase Ground Connection Failure, it is characterised in that: The hook(1)It may be configured as right angle hook.
CN201810833726.1A 2018-07-26 2018-07-26 A kind of fast accurate searches the method and detection device of Single-phase Ground Connection Failure Pending CN108627735A (en)

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CN201810833726.1A CN108627735A (en) 2018-07-26 2018-07-26 A kind of fast accurate searches the method and detection device of Single-phase Ground Connection Failure

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Application Number Priority Date Filing Date Title
CN201810833726.1A CN108627735A (en) 2018-07-26 2018-07-26 A kind of fast accurate searches the method and detection device of Single-phase Ground Connection Failure

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Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101382577A (en) * 2008-10-24 2009-03-11 华北电力大学 Single-phase earth fault positioning device for electrical power distribution network
CN101483337A (en) * 2009-02-25 2009-07-15 北京盛华宏业科技有限公司 Failure automatic diagnosis and separation apparatus and method for power distribution network overhead line
CN101907675A (en) * 2010-06-25 2010-12-08 江苏省电力公司泗洪县供电公司 Method for finding out fault of distribution network circuit
CN201845663U (en) * 2010-10-27 2011-05-25 灵宝市电业局 Multifunctional insulating supporting operating rod
CN201935978U (en) * 2010-11-30 2011-08-17 河南省电力公司安阳供电公司 Simple ground fault detection apparatus
CN202676848U (en) * 2012-07-11 2013-01-16 河南省电力公司郑州供电公司 High voltage electric power equipment grounding detector
CN203643555U (en) * 2013-12-31 2014-06-11 西安兴汇电力科技有限公司 Tour-inspection device for single-phase earth fault point of power distribution network
CN205826800U (en) * 2016-07-14 2016-12-21 国网山东省电力公司平原县供电公司 A kind of line-to-ground line selection apparatus
CN106501674A (en) * 2016-10-24 2017-03-15 国网福建省电力有限公司 Medium voltage distribution network single-phase earth fault positioning device and its Fault Locating Method
CN206114825U (en) * 2016-09-28 2017-04-19 国网河南省电力公司安阳供电公司 10kV circuit phase to earth fault seeks appearance
CN207650315U (en) * 2017-12-05 2018-07-24 国网宁夏电力有限公司固原供电公司 Distribution line ground fault detection device

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101382577A (en) * 2008-10-24 2009-03-11 华北电力大学 Single-phase earth fault positioning device for electrical power distribution network
CN101483337A (en) * 2009-02-25 2009-07-15 北京盛华宏业科技有限公司 Failure automatic diagnosis and separation apparatus and method for power distribution network overhead line
CN101907675A (en) * 2010-06-25 2010-12-08 江苏省电力公司泗洪县供电公司 Method for finding out fault of distribution network circuit
CN201845663U (en) * 2010-10-27 2011-05-25 灵宝市电业局 Multifunctional insulating supporting operating rod
CN201935978U (en) * 2010-11-30 2011-08-17 河南省电力公司安阳供电公司 Simple ground fault detection apparatus
CN202676848U (en) * 2012-07-11 2013-01-16 河南省电力公司郑州供电公司 High voltage electric power equipment grounding detector
CN203643555U (en) * 2013-12-31 2014-06-11 西安兴汇电力科技有限公司 Tour-inspection device for single-phase earth fault point of power distribution network
CN205826800U (en) * 2016-07-14 2016-12-21 国网山东省电力公司平原县供电公司 A kind of line-to-ground line selection apparatus
CN206114825U (en) * 2016-09-28 2017-04-19 国网河南省电力公司安阳供电公司 10kV circuit phase to earth fault seeks appearance
CN106501674A (en) * 2016-10-24 2017-03-15 国网福建省电力有限公司 Medium voltage distribution network single-phase earth fault positioning device and its Fault Locating Method
CN207650315U (en) * 2017-12-05 2018-07-24 国网宁夏电力有限公司固原供电公司 Distribution line ground fault detection device

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Application publication date: 20181009

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