CN104360216B - Ground detection device and ground detecting method - Google Patents
Ground detection device and ground detecting method Download PDFInfo
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- CN104360216B CN104360216B CN201410637346.2A CN201410637346A CN104360216B CN 104360216 B CN104360216 B CN 104360216B CN 201410637346 A CN201410637346 A CN 201410637346A CN 104360216 B CN104360216 B CN 104360216B
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Abstract
The present invention is on a kind of ground detection device and ground detecting method, is related to earthing detection field, and main purpose is outside quick detection on overhead transmission line, with the presence or absence of ground connection, to reduce the labor intensity of operating personnel, improve detection efficiency.The technical scheme mainly used for：Ground detection device, including direct current output unit, the first electric conductor, the second electric conductor and current detecting unit；Direct current output unit includes first electrode end and second electrode end；First electric conductor, its one end electrically connect with the first electrode end, and the other end is used to electrically connect with outside circuit to be measured；Second electric conductor, its one end electrically connect with the second electrode end, and the other end is used to be grounded；Current detecting unit, whether there is DC current to pass through on first electric conductor and/or second electric conductor for detecting.Technical scheme provided by the invention is applied to carry out earthing detection to outside three-phase overhead transmission line.
Description
Technical field
The present invention relates to earthing detection technical field, more particularly to a kind of ground detection device and ground detecting method.
Background technology
Overhead transmission line is to be fixed on transmission pressure with insulator between the shaft tower for standing on ground to transmit the defeated of electric energy
Electric line.The distance of overhead transmission line is typically very long, is constructed according to bid section by different construction units, the duration is longer.Meanwhile in order to
Prevent that induced electricity and wind-powered electricity generation from causing danger to workmen, ground wire must be hung during construction operation, therefore occasional causes to apply
Ground wire is without situation about removing after work.After the completion of newly-built or maintenance, staff needs to check and is grounded overhead transmission line
The dismounting situation of line, if there is the ground wire do not removed on overhead transmission line, start in overhead transmission line parameter testing or overhead transmission line
When, exception will occur, will have a strong impact on that test period and overhead transmission line put into operation the time.
Existing solution is：Before overhead transmission line puts into operation, tour personnel is along overhead transmission line step by step between each shaft tower
Checked.Its drawback is：Time is grown, it is impossible to quick to find overhead transmission line with the presence or absence of ground connection.
The content of the invention
In view of this, the present invention provides a kind of ground detection device and ground detecting method, main purpose are quickly to examine
Survey on outside overhead transmission line with the presence or absence of ground connection, reduce the labor intensity of operating personnel, improve detection efficiency.
To reach above-mentioned purpose, present invention generally provides following technical scheme：
On the one hand, embodiments of the invention provide a kind of ground detection device, including：
Direct current output unit, including first electrode end and second electrode end；
First electric conductor, its one end electrically connect with the first electrode end, and the other end is used to be electrically connected with outside circuit to be measured
Connect；
Second electric conductor, its one end electrically connect with the second electrode end, and the other end is used to be grounded；And
Current detecting unit, whether there is direct current on first electric conductor and/or second electric conductor for detecting
Stream passes through.
The object of the invention to solve the technical problems can be also applied to the following technical measures to achieve further.
Foregoing ground detection device, wherein, the direct current output unit includes the first current transformer and direct current
Source；
The first winding of first current transformer is connected in series with the dc source and forms the first loop；
The both ends of the secondary winding of first current transformer form the first electrode end and the second electrode end.
Foregoing ground detection device, wherein, the direct current output unit also includes：
Switch, is series in first loop, for first loop that is turned on or off.
Foregoing ground detection device, wherein, the current detecting unit includes the second current transformer and ammeter；
The secondary winding of second current transformer is connected in series with the ammeter and forms second servo loop；
The first winding of second current transformer is arranged between first electric conductor and the first electrode end,
One end of the first winding of second current transformer electrically connects with first electric conductor, the other end and the first electrode
End electrical connection；
Or
The first winding of second current transformer is arranged between second electric conductor and the second electrode end,
One end of the first winding of second current transformer electrically connects with second electric conductor, the other end and the second electrode
End electrical connection.
Foregoing ground detection device, wherein also including attachment means, the attachment means include：
Insulating bar；And
Hook, is arranged at the insulating bar, and the hook is made of an electrically conducting material, the hook and first electric conductor
Electrical connection, for hanging on outside circuit to be measured and being electrically connected with outside circuit to be measured；
First electric conductor is electrically connected by the hook with outside circuit to be measured.
Foregoing ground detection device, wherein, the quantity of the attachment means is three, the extension of three attachment means
Hook is configured to hang on three different transmission pressures of outside three-phase overhead transmission line respectively and led with the corresponding transmission of electricity
Line electrically connects.
Foregoing ground detection device, wherein, the insulating bar is expansion link.
Foregoing ground detection device, wherein also including：
Alarm unit, for have DC current by when perform corresponding alarm response；
The alarm unit is arranged between first electric conductor and the first electrode end, and the one of the alarm unit
End electrically connects with first electric conductor, and the other end electrically connects with the first electrode end；
Or
The alarm unit is arranged between second electric conductor and the second electrode end, and the one of the alarm unit
End electrically connects with second electric conductor, and the other end electrically connects with the second electrode end.
Foregoing ground detection device, wherein, first electric conductor and second electric conductor are wire.
On the other hand, embodiments of the invention also provide a kind of ground detecting method, including：
The first electrode end of direct current output unit is electrically connected by the first electric conductor with outside circuit to be measured；
The second electrode end of the direct current output unit is grounded by the second electric conductor；
Whether detect on first electric conductor and/or second electric conductor has DC current to pass through.
By above-mentioned technical proposal, ground detection device and ground detecting method provided in an embodiment of the present invention at least have
Following beneficial effect：
First, technical scheme provided in an embodiment of the present invention is by setting direct current output unit, the first electric conductor, second to lead
Electric body and current detecting unit, when carrying out earthing detection to outside circuit to be measured, it is only necessary to by the one of the first electric conductor
End is electrically connected with outside circuit to be measured, and one end of the second electric conductor is grounded, and is then led by current detecting unit detection first
Whether have on electric body and/or the second electric conductor DC current by, when detection have DC current by when then illustrate it is outside to be measured
Circuit has ground connection, conversely, when detect without DC current by when then illustrate that outside circuit to be measured is not grounded.Relative to
Tour personnel checks whether there is ground connection step by step along overhead transmission line between shaft tower in the prior art, and ground detection device of the present invention is only
Need to carry out any place between two shaft towers on outside overhead transmission line detection that outside overhead line between two shaft tower can be learnt
Whether road has the situation of ground connection, and its detection efficiency is higher, and the labor intensity of operating personnel is low.
2nd, the present embodiment provide technical scheme include direct current output unit, the first electric conductor, the second electric conductor and
Current detecting unit, its building block is less, and structure is simpler.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention,
And can be practiced according to the content of specification, below with presently preferred embodiments of the present invention and coordinate accompanying drawing describe in detail as after.
Brief description of the drawings
Fig. 1 is that a kind of ground detection device that one embodiment of the invention provides is connected with outside circuit to be measured and the earth
Structured flowchart；
Fig. 2 is a kind of circuit realiration schematic diagram for ground detection device that one embodiment of the invention provides；
Fig. 3 is the circuit realiration schematic diagram for another ground detection device that one embodiment of the invention provides；
Fig. 4 is a kind of structural representation for ground detection device that one embodiment of the invention provides；
Fig. 5 is that the alarm unit that one embodiment of the invention provides is connected with the first electric conductor and first electrode end respectively
Structured flowchart；
Fig. 6 is that another alarm unit that one embodiment of the invention provides connects with the second electric conductor and second electrode end respectively
The structured flowchart connect；
Fig. 7 is a kind of schematic flow sheet for ground detecting method that one embodiment of the invention provides.
Embodiment
Further to illustrate the present invention to reach the technological means and effect that predetermined goal of the invention is taken, below in conjunction with
Accompanying drawing and preferred embodiment, to embodiment, structure, feature and its effect according to the present patent application, describe in detail such as
Afterwards.In the following description, what different " embodiment " or " embodiment " referred to is not necessarily the same embodiment.It is in addition, one or more
Special characteristic, structure or feature in individual embodiment can be combined by any suitable form.
As shown in figure 1, a kind of ground detection device that one embodiment of the invention proposes, including direct current output unit 1, the
One electric conductor 2, the second electric conductor 3 and current detecting unit 5.Direct current output unit 1 includes first electrode end 11 and second
Electrode tip 12.The first electrode end 11 and second electrode end 12 are respectively the both positive and negative polarity of direct current output unit 1, are specifically being implemented
When, when first electrode end 11 is positive pole, then second electrode end 12 is negative pole；Conversely, when first electrode end 11 is negative pole, then
Second electrode end 12 is positive pole.
One end of first electric conductor 2 electrically connects with first electrode end 11, and the other end of the first electric conductor 2 is used to treat with outside
Survey line road 4 electrically connects.One end of second electric conductor 3 electrically connects with second electrode end 12, and the other end of the second electric conductor 3 is used to connect
Ground, " ground connection " herein refer to be connected with the earth.Current detecting unit 5, it is conductive for detecting the first electric conductor 2 and/or second
Whether there is DC current to pass through on body 3.
Specifically when carrying out earthing detection to outside circuit 4 to be measured, by one end of the first electric conductor 2 and outside circuit to be measured
4 electrical connections, one end of the second electric conductor 3 is grounded.As shown in Figures 2 and 3, when outside circuit 4 to be measured has ground connection, there is ground connection
The outside electric conductor 2 of circuit 4 and first to be measured, direct current output unit 1, the second electric conductor 3 and the earth formed loop, the earth
Resistive element is served as in the loop.In the presence of direct current output unit 1, on the first electric conductor 2 and the second electric conductor 3
There is DC current to pass through.Now, current detecting unit 5, which is able to detect that on the first electric conductor 2 and/or the second electric conductor 3, has directly
Electric current is flowed by the way that user can infer that outside circuit 4 to be measured has ground connection accordingly.Conversely, when outside circuit 4 to be measured is not grounded
When, the outside electric conductor 2 of circuit 4 and first to be measured, the electric conductor 3 of direct current output unit 1 and second can not form one completely
Loop, now current detecting unit 5 detect do not have on the first electric conductor 2 and/or the second electric conductor 3 DC current by,
User can infer that outside circuit 4 to be measured is not grounded accordingly.
Technical scheme provided in an embodiment of the present invention is by setting direct current output unit 1, the first electric conductor 2, second to lead
Electric body 3 and current detecting unit 5, it is only necessary to detected to any place on the outside overhead transmission line between two shaft towers
Learn whether outside overhead transmission line between two shaft tower has the situation of ground connection, its detection efficiency is higher, and the work of operating personnel is strong
Spend low.In addition, the building block of ground detection device provided in an embodiment of the present invention is less, structure is simpler.
Specifically when implementing, as shown in Figures 2 and 3, direct current output unit 1 in the embodiment of the present invention can include the
One current transformer 102 and dc source 101.The dc source 101 can be dry cell or battery etc..First Current Mutual Inductance
The first winding of device 102 is connected in series with dc source 101 and forms the first loop 10.First current transformer 102 it is secondary
The both ends of winding form foregoing first electrode end 11 and second electrode end 12.
Current transformer is common technology of the prior art, can be chosen in the prior art as needed.Electricity
Current transformer is made of according to electromagnetic induction principle.Current transformer is made up of the iron core and winding closed.Current transformer
Including first winding and secondary winding, the first winding number of turn of current transformer is seldom, and secondary winding turn ratio is more.Electric current is mutual
The effect of sensor is that the larger primary current of numerical value in first winding is converted to numerical value in secondary winding by certain no-load voltage ratio
Less secondary current.The larger electric current of dc source 101 can be converted into less electricity by first current transformer 102
Stream the first electric conductor 2 of input and the second electric conductor 3, so as to the external loading on the first electric conductor 2 and the second electric conductor 3
Effectively protected, while less DC current is also convenient for measuring on the first electric conductor 2 and the second electric conductor 3.
Further, as shown in Figures 2 and 3, the direct current output unit 1 in above-described embodiment also includes switch 103, opens
Close 103 to be series in the first loop 10, for first loop 10 that is turned on or off.The technical scheme that the present embodiment provides is by setting
The switch 103 put can be controlled in real time to the open close of the first loop 10, convenient working human users；In addition, in idle,
First loop 10 can be disconnected by switch 103, ensure the safety of operating personnel.
Specifically when implementing, as shown in Figures 2 and 3, the current detecting unit 5 in above-described embodiment can include the second electricity
Current transformer 501 and ammeter 502.The secondary winding of second current transformer 501 is connected in series with ammeter 502 and forms the
Secondary circuit 20.The first winding of second current transformer 501 can be series between the first electric conductor 2 and first electrode end 11,
It can also be series between the second electric conductor 3 and second electrode end 12.
First, Fig. 2 shows that the first winding of the second current transformer 501 is arranged at the first electric conductor 2 and first electrode end
A kind of embodiment between 11.One end of the first winding of second current transformer 501 electrically connects with the first electric conductor 2, separately
One end electrically connects with first electrode end 11.In other words, the first electric conductor 2 passes through the second current transformer 501 and first electrode
The electrical connection of end 11, the first winding of the second current transformer 501 are series between the first electric conductor 2 and first electrode end 11.
2nd, Fig. 3 shows that the first winding of the second current transformer 501 is arranged at the second electric conductor 3 and second electrode end
A kind of embodiment between 12.One end of the first winding of second current transformer 501 electrically connects with the second electric conductor 3, separately
One end electrically connects with second electrode end 12.In other words, the second electric conductor 3 passes through the second current transformer 501 and second electrode
The electrical connection of end 12, the first winding of the second current transformer 501 are series between the second electric conductor 3 and second electrode end 12.
In two embodiments, when carrying out earthing detection to outside circuit 4 to be measured, if outside circuit 4 to be measured has
Ground connection, then have DC current by the way that the first larger DC current is second on the first electric conductor 2 and the second electric conductor 3
Less second DC current that can be converted into the presence of current transformer 501 on the second servo loop 20 of secondary winding side,
Less second DC current disclosure satisfy that the range requirement of ammeter 502, facilitate ammeter 502 to second DC current
Caught and measured.
In actual applications, the ammeter 502 in above-described embodiment can be pointer gauge or digital table.
Specifically when implementing, ground detection device provided in an embodiment of the present invention can also include attachment means.Such as Fig. 4 institutes
Show, attachment means include insulating bar 6 and hook 7.Hook 7 is arranged at insulating bar 6, and hook 7 is made of an electrically conducting material, hook 7 with
First electric conductor 2 electrically connects.Hook 7 is used to hang on outside circuit 4 to be measured and electrically connected with outside circuit 4 to be measured.First leads
Electric body 2 can be electrically connected by the hook 7 with outside circuit 4 to be measured.The insulating bar 6 that the technical scheme of the present embodiment passes through setting
With hook 7, the join domain of the first electric conductor 2 can be expanded, such as, when outside circuit 4 to be measured is very high, operating personnel can be with
First electric conductor 2 circuit 4 to be measured with the outside of eminence is connected by insulating bar 6 and hook 7, so as to which convenient working personnel grasp
Make.
In actual applications, above-mentioned hook 7 can be set in one end of insulating bar 6, and the other end of insulating bar 6 is hand-held
End.When operating personnel holds one end of insulating bar 6, hook 7 can be hung on outside circuit 4 to be measured.Wherein, in order to improve
Hook 7 safe application performance, the inner hollow of insulating bar 6, the first electric conductor 2 the inside cabling of insulating bar 6 and realize with
The electrical connection of hook 7.
Further, as shown in Figures 2 and 3, the quantity of the attachment means in above-described embodiment can be three.Specifically exist
During implementation, because the outside three-phase overhead transmission line between adjacent two shaft tower has three transmission pressures, when operating personnel's needs pair
When three transmission pressures of the three-phase overhead transmission line carry out earthing detection simultaneously, operating personnel is only needed three attachment means
Hook 7 is hung on three different transmission pressures of outside three-phase overhead transmission line respectively, makes each hook 7 and a transmission of electricity
Wire corresponds, and each hook 7 electrically connects with corresponding transmission pressure.When current detecting unit 5 has detected
During DC current, then illustrate that at least a transmission pressure has grounding phenomenon in the three-phase overhead transmission line between two shaft tower.
The technical scheme that the present embodiment provides, can be simultaneously to three of outside three-phase overhead transmission line by setting three attachment means
Transmission pressure carries out earthing detection, and detection efficiency is further enhanced.
Further, the insulating bar 6 in above-described embodiment can be expansion link.The length of expansion link is freely adjustable, energy
Enough meet operating personnel under different execution conditions to the demand of the connecting length of the first electric conductor 2.
Specifically when implementing, as shown in Figure 5 and Figure 6, the ground detection device in above-described embodiment can also include alarm
Unit 8, the alarm unit 8 be used for have DC current by when perform corresponding alarm response.Wherein, alarm unit 8 can be set
Put between the first electric conductor 2 and first electrode end 11, can also be arranged between the second electric conductor 3 and second electrode end 12.
First, Fig. 5 shows a kind of embodiment party that alarm unit 8 is arranged between the first electric conductor 2 and first electrode end 11
Formula.One end of alarm unit 8 electrically connects with the first electric conductor 2, and the other end of alarm unit 8 electrically connects with first electrode end 11.
In other words, the first electric conductor 2 is electrically connected by alarm unit 8 with first electrode end 11, and it is conductive that alarm unit 8 is series at first
Between body 2 and first electrode end 11.
2nd, Fig. 6 shows a kind of embodiment party that alarm unit 8 is arranged between the second electric conductor 3 and second electrode end 12
Formula.One end of alarm unit 8 electrically connects with the second electric conductor 3, and the other end of alarm unit 8 electrically connects with second electrode end 12.
In other words, the second electric conductor 3 is electrically connected by alarm unit 8 with second electrode end 12, and it is conductive that alarm unit 8 is series at second
Between body 3 and second electrode end 12.
By setting alarm unit 8 in the technical scheme of two embodiments, rung when alarm unit 8 performs corresponding alarm
At once, then illustrate ground connection in circuit to be measured be present.The alarm unit 8 of the setting can allow operating personnel to learn the knot of detection in time
Fruit, operation is more convenient, and the usage experience of operating personnel is preferable.
In practical operation, above-mentioned alarm unit 8 can be buzzer or alarm lamp.For example, have when in circuit to be measured
DC current by when, buzzer sends audio signal or alarm lamp sends optical signal.
Fig. 7 shows a kind of schematic flow sheet for ground detecting method that another embodiment of the present invention provides.Such as Fig. 7 institutes
Show, the executive agent of the method described in the present embodiment can be the ground detection device that above-described embodiment provides, specifically, this reality
Applying the method described in example includes：
Step 201, the first electrode end of direct current output unit is electrically connected by the first electric conductor and outside circuit to be measured
Connect.
Step 202, the second electrode end of the direct current output unit is grounded by the second electric conductor.
The size of step 203, detection first electric conductor or the DC current on second electric conductor.
Need exist for supplement be：Above-mentioned step 201 and the order of step 202 can overturn, you can with first by direct current
The second electrode end of electricity output unit is grounded by the second electric conductor, then again leads to the first electrode end of direct current output unit
The first electric conductor is crossed to electrically connect with outside circuit to be measured.
The above described is only a preferred embodiment of the present invention, any formal limitation not is made to the present invention, according to
Any simple modification, equivalent change and modification made according to the technical spirit of the present invention to above example, still falls within this hair
In the range of bright technical scheme.
Claims (9)
- A kind of 1. ground detection device, it is characterised in that including：Direct current output unit, including first electrode end and second electrode end；First electric conductor, its one end electrically connect with the first electrode end, and the other end is used to electrically connect with outside circuit to be measured；Second electric conductor, its one end electrically connect with the second electrode end, and the other end is used to be grounded；AndCurrent detecting unit, whether there is direct current circulation on first electric conductor and/or second electric conductor for detecting Cross.
- 2. ground detection device as claimed in claim 1, it is characterised in thatThe direct current output unit includes the first current transformer and dc source；The first winding of first current transformer is connected in series with the dc source and forms the first loop；The both ends of the secondary winding of first current transformer form the first electrode end and the second electrode end；The direct current output unit also includes：Switch, is series in first loop, for first loop that is turned on or off.
- 3. the ground detection device as described in any one of claim 1 to 2, it is characterised in that the current detecting unit includes Second current transformer and ammeter；The secondary winding of second current transformer is connected in series with the ammeter and forms second servo loop；The first winding of second current transformer is arranged between first electric conductor and the first electrode end, described One end of the first winding of second current transformer electrically connects with first electric conductor, the other end and first electrode end electricity Connection；OrThe first winding of second current transformer is arranged between second electric conductor and the second electrode end, described One end of the first winding of second current transformer electrically connects with second electric conductor, the other end and second electrode end electricity Connection.
- 4. the ground detection device as described in any one of claim 1 to 2, it is characterised in that also including attachment means, the company Connection device includes：Insulating bar；AndHook, is arranged at the insulating bar, the hook is made of an electrically conducting material, and the hook is electrically connected with first electric conductor Connect, for hanging on outside circuit to be measured and being electrically connected with outside circuit to be measured；First electric conductor is electrically connected by the hook with outside circuit to be measured.
- 5. ground detection device as claimed in claim 4, it is characterised in thatThe quantity of the attachment means is three, and the hook of three attachment means is configured to hang on outside three photo frames respectively Three different transmission pressures on ceases to be busy road and electrically connected with the corresponding transmission pressure.
- 6. ground detection device as claimed in claim 4, it is characterised in that the insulating bar is expansion link.
- 7. the ground detection device as described in any one of claim 1 to 2, it is characterised in that also include：Alarm unit, for have DC current by when perform corresponding alarm response；The alarm unit is arranged between first electric conductor and the first electrode end, one end of the alarm unit with The first electric conductor electrical connection, the other end electrically connect with the first electrode end；OrThe alarm unit is arranged between second electric conductor and the second electrode end, one end of the alarm unit with The second electric conductor electrical connection, the other end electrically connect with the second electrode end.
- 8. the ground detection device as described in any one of claim 1 to 2, it is characterised in thatFirst electric conductor and second electric conductor are wire.
- A kind of 9. ground detecting method, it is characterised in that including：The first electrode end of direct current output unit is electrically connected by the first electric conductor with outside circuit to be measured；The second electrode end of the direct current output unit is grounded by the second electric conductor；Whether detect on first electric conductor and/or second electric conductor has DC current to pass through.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410637346.2A CN104360216B (en) | 2014-11-05 | 2014-11-05 | Ground detection device and ground detecting method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410637346.2A CN104360216B (en) | 2014-11-05 | 2014-11-05 | Ground detection device and ground detecting method |
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| CN104360216B true CN104360216B (en) | 2018-01-12 |
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| CN107238776B (en) * | 2017-05-27 | 2020-10-02 | 国网河南省电力公司平顶山供电公司 | Detection alarm device for preventing transformer substation from transmitting power with safety measures |
| CN109116167A (en) * | 2018-07-27 | 2019-01-01 | 中国电力科学研究院有限公司 | A kind of cable grounding line monitoring device and method based on coupling coil |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20010000555A (en) * | 2000-10-06 | 2001-01-05 | 조효상 | Ground relay of engine driven generator |
| CN102231489B (en) * | 2011-04-22 | 2013-07-03 | 西安理工大学 | Method for monitoring grounding wire connection status during power line maintenance work |
| CN102636722B (en) * | 2012-04-27 | 2014-12-10 | 广东电网公司肇庆供电局 | Detection device for preventing switching-on of grounding wires |
| CN102903204A (en) * | 2012-10-24 | 2013-01-30 | 四川省电力公司绵阳电业局 | Grounding wire missing-disassembly alarm device |
| CN204228876U (en) * | 2014-11-05 | 2015-03-25 | 国家电网公司 | Ground detection device |
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