CN204228876U - Ground detection device - Google Patents

Ground detection device Download PDF

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Publication number
CN204228876U
CN204228876U CN201420657683.3U CN201420657683U CN204228876U CN 204228876 U CN204228876 U CN 204228876U CN 201420657683 U CN201420657683 U CN 201420657683U CN 204228876 U CN204228876 U CN 204228876U
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CN
China
Prior art keywords
electric conductor
electrode tip
electrically
current
current transformer
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.)
Withdrawn - After Issue
Application number
CN201420657683.3U
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Chinese (zh)
Inventor
魏刚
刘铁城
杨少铁
詹爱东
严伟
白桦
王晓卉
刘佳巍
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.)
State Grid Corp of China SGCC
Beijing Electric Power Transmission and Transformation Co
Original Assignee
State Grid Corp of China SGCC
Beijing Electric Power Transmission and Transformation Co
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Filing date
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Application filed by State Grid Corp of China SGCC, Beijing Electric Power Transmission and Transformation Co filed Critical State Grid Corp of China SGCC
Priority to CN201420657683.3U priority Critical patent/CN204228876U/en
Application granted granted Critical
Publication of CN204228876U publication Critical patent/CN204228876U/en
Withdrawn - After Issue legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model is about a kind of ground detection device, relates to earthing detection field, and fundamental purpose is to detect on outside overhead transmission line whether there is ground connection fast, reduces the labour intensity of operating personnel, improves detection efficiency.The technical scheme of main employing is: ground detection device, comprises direct current output unit, the first electric conductor, the second electric conductor and current detecting unit; Direct current output unit comprises the first electrode tip and the second electrode tip; First electric conductor, its one end is electrically connected with described first electrode tip, and the other end is used for being connected with outside line electricity to be measured; Second electric conductor, its one end is electrically connected with described second electrode tip, and the other end is used for ground connection; Whether current detecting unit, have DC current to pass through for detecting on described first electric conductor and/or described second electric conductor.The technical scheme that the utility model provides is applicable to carry out earthing detection to outside three-phase overhead transmission line.

Description

Ground detection device
Technical field
The utility model relates to earthing detection technical field, particularly relates to a kind of ground detection device.
Background technology
Overhead transmission line be with insulator transmission pressure is fixed on stand on ground shaft tower between with the transmission line of electricity of electric energy transmitting.The distance of overhead transmission line is generally very long, and constructed by different construction units according to bid section, the duration is longer.Meanwhile, in order to prevent induced electricity and wind-powered electricity generation from causing danger to workmen, must hang ground wire during construction operation, therefore occasional causes the situation that ground wire after construction is not removed.Overhead transmission line is newly-built or after having overhauled, staff needs the dismounting situation checking ground wire, if overhead transmission line there is the ground wire do not removed, when overhead transmission line parameter testing or overhead transmission line start, just there will be exception, will test period be had a strong impact on and overhead transmission line puts into operation the time.
Existing solution is: before overhead transmission line puts into operation, and tour personnel check step by step along overhead transmission line between each shaft tower.Its drawback is: the time is long, can not find whether overhead transmission line exists ground connection fast.
Utility model content
In view of this, the utility model provides a kind of ground detection device, and fundamental purpose is to detect on outside overhead transmission line whether there is ground connection fast, reduces the labour intensity of operating personnel, improves detection efficiency.
For achieving the above object, the utility model mainly provides following technical scheme:
Embodiment of the present utility model provides a kind of ground detection device, comprising:
Direct current output unit, comprises the first electrode tip and the second electrode tip;
First electric conductor, its one end is electrically connected with described first electrode tip, and the other end is used for being connected with outside line electricity to be measured;
Second electric conductor, its one end is electrically connected with described second electrode tip, and the other end is used for ground connection; And
Whether current detecting unit, have DC current to pass through for detecting on described first electric conductor and/or described second electric conductor.
The purpose of this utility model and solve its technical matters and also can be applied to the following technical measures to achieve further.
Aforesaid ground detection device, wherein, described direct current output unit comprises the first current transformer and direct supply;
A winding of described first current transformer and described direct supply are connected in series and form the first loop;
The two ends of the Secondary Winding of described first current transformer form described first electrode tip and described second electrode tip.
Aforesaid ground detection device, wherein, described direct current output unit also comprises:
Switch, is series in described first loop, for described first loop that is turned on or off.
Aforesaid ground detection device, wherein, described current detecting unit comprises the second current transformer and reometer;
The Secondary Winding of described second current transformer and described reometer are connected in series and form second servo loop;
A winding of described second current transformer is arranged between described first electric conductor and described first electrode tip, and one end of a winding of described second current transformer is electrically connected with described first electric conductor, and the other end is electrically connected with described first electrode tip;
Or
A winding of described second current transformer is arranged between described second electric conductor and described second electrode tip, and one end of a winding of described second current transformer is electrically connected with described second electric conductor, and the other end is electrically connected with described second electrode tip.
Aforesaid ground detection device, wherein also comprises coupling arrangement, and described coupling arrangement comprises:
Insulating bar; And
Hook, be arranged at described insulating bar, described hook is made up of conductive material, and described hook is electrically connected with described first electric conductor, for hanging on described outside circuit to be measured and being connected with described outside line electricity to be measured;
Described first electric conductor is connected with described outside line electricity to be measured by described hook.
Aforesaid ground detection device, wherein, the quantity of described coupling arrangement is three, and the hook of three described coupling arrangements is configured to hang on respectively the different transmission pressure of three of outside three-phase overhead transmission line and is electrically connected with corresponding described transmission pressure.
Aforesaid ground detection device, wherein, described insulating bar is expansion link.
Aforesaid ground detection device, wherein also comprises:
Alarm unit, for have DC current by time perform corresponding alarm response;
Described alarm unit is arranged between described first electric conductor and described first electrode tip, and one end of described alarm unit is electrically connected with described first electric conductor, and the other end is electrically connected with described first electrode tip;
Or
Described alarm unit is arranged between described second electric conductor and described second electrode tip, and one end of described alarm unit is electrically connected with described second electric conductor, and the other end is electrically connected with described second electrode tip.
Aforesaid ground detection device, wherein, described first electric conductor and described second electric conductor are wire.
By technique scheme, the ground detection device that the utility model embodiment provides at least has following beneficial effect:
One, the technical scheme that the utility model embodiment provides is by arranging direct current output unit, first electric conductor, second electric conductor and current detecting unit, when when carrying out earthing detection to outside circuit to be measured, line electricity to be measured to one end of the first electric conductor and outside is only needed to be connected, by one end ground connection of the second electric conductor, whether then detected on the first electric conductor and/or the second electric conductor by current detecting unit has DC current to pass through, when detection have DC current by time then illustrate that outside circuit to be measured has ground connection, otherwise, when detect do not have DC current by time then illustrate that outside circuit to be measured does not have ground connection.Between shaft tower, ground connection has been checked whether along overhead transmission line step by step relative to tour personnel in prior art, the utility model ground detection device only needs to carry out detecting to the arbitrary place on overhead transmission line outside between two shaft towers to learn between this two shaft tower, whether outside overhead transmission line has the situation of ground connection, its detection efficiency is higher, and the labour intensity of operating personnel is low.
Two, the technical scheme that the present embodiment provides comprises direct current output unit, the first electric conductor, the second electric conductor and current detecting unit, and its building block is less, and structure is simpler.
Above-mentioned explanation is only the general introduction of technical solutions of the utility model, in order to better understand technological means of the present utility model, and can be implemented according to the content of instructions, coordinates accompanying drawing to be described in detail as follows below with preferred embodiment of the present utility model.
Accompanying drawing explanation
Fig. 1 is the structured flowchart that a kind of ground detection device of providing of the utility model one embodiment is connected with outside circuit to be measured and the earth;
Fig. 2 is the circuit realiration schematic diagram of a kind of ground detection device that the utility model one embodiment provides;
Fig. 3 is the circuit realiration schematic diagram of the another kind of ground detection device that the utility model one embodiment provides;
Fig. 4 is the structural representation of a kind of ground detection device that the utility model one embodiment provides;
Fig. 5 is the structured flowchart that alarm unit that the utility model one embodiment provides is connected with the first electric conductor and the first electrode tip respectively;
Fig. 6 is the structured flowchart that another alarm unit that the utility model one embodiment provides is connected with the second electric conductor and the second electrode tip respectively;
Fig. 7 is the schematic flow sheet of a kind of ground detecting method that the utility model one embodiment provides.
Embodiment
For further setting forth the utility model for the technological means reaching predetermined utility model object and take and effect, below in conjunction with accompanying drawing and preferred embodiment, to according to the embodiment of the utility model application, structure, feature and effect thereof, be described in detail as follows.In the following description, the not necessarily same embodiment that different " embodiment " or " embodiment " refers to.In addition, special characteristic, structure or feature in one or more embodiment can be combined by any suitable form.
As shown in Figure 1, a kind of ground detection device that the utility model one embodiment proposes, comprises direct current output unit 1, first electric conductor 2, second electric conductor 3 and current detecting unit 5.Direct current output unit 1 comprises the first electrode tip 11 and the second electrode tip 12.This first electrode tip 11 and the second electrode tip 12 are respectively the both positive and negative polarity of direct current output unit 1, and specifically when implementing, when the first electrode tip 11 is positive pole, then the second electrode tip 12 is negative pole; Otherwise when the first electrode tip 11 is negative pole, then the second electrode tip 12 is positive pole.
One end of first electric conductor 2 is electrically connected with the first electrode tip 11, and the other end of the first electric conductor 2 is used for being electrically connected with outside circuit 4 to be measured.One end of second electric conductor 3 is electrically connected with the second electrode tip 12, and the other end of the second electric conductor 3 is used for ground connection, and " ground connection " herein refers to and is greatly connected.Whether current detecting unit 5, have DC current to pass through for detecting on the first electric conductor 2 and/or the second electric conductor 3.
Specifically when carrying out earthing detection to outside circuit 4 to be measured, circuit 4 to be measured to one end of the first electric conductor 2 and outside is electrically connected, by one end ground connection of the second electric conductor 3.As shown in Figures 2 and 3, when outside circuit 4 to be measured has ground connection, have the outside of ground connection circuit 4 to be measured and the first electric conductor 2, direct current output unit 1, second electric conductor 3 and the earth to form loop, the earth serves as resistive element in this loop.Under the effect of direct current output unit 1, the first electric conductor 2 and the second electric conductor 3 all there is DC current to pass through.Now, current detecting unit 5 can detect, and the first electric conductor 2 and/or the second electric conductor 3 have DC current to pass through, and user can infer that this outside circuit 4 to be measured has ground connection accordingly.Otherwise, when outside circuit 4 to be measured does not have ground connection, outside circuit 4 to be measured and the first electric conductor 2, direct current output unit 1 and the second electric conductor 3 can not form a complete loop, now current detecting unit 5 detects, and the first electric conductor 2 and/or the second electric conductor 3 do not have DC current to pass through, and user can infer that this outside circuit 4 to be measured does not have ground connection accordingly.
The technical scheme that the utility model embodiment provides is by arranging direct current output unit 1, first electric conductor 2, second electric conductor 3 and current detecting unit 5, only need to carry out detecting to the arbitrary place on the outside overhead transmission line between two shaft towers to learn between this two shaft tower, whether outside overhead transmission line has the situation of ground connection, its detection efficiency is higher, and the labour intensity of operating personnel is low.In addition, the building block of the ground detection device that the utility model embodiment provides is less, and structure is simpler.
Specifically when implementing, as shown in Figures 2 and 3, the direct current output unit 1 in the utility model embodiment can comprise the first current transformer 102 and direct supply 101.This direct supply 101 can be dry cell or accumulator etc.A winding of the first current transformer 102 and direct supply 101 are connected in series and form the first loop 10.The two ends of the Secondary Winding of the first current transformer 102 form aforesaid first electrode tip 11 and the second electrode tip 12.
Current transformer is common technology of the prior art, can choose in the prior art as required.Current transformer makes according to electromagnetic induction principle.Current transformer is made up of the iron core closed and winding.Current transformer comprises a winding and Secondary Winding, and a umber of turn of current transformer is little, and Secondary Winding turn ratio is more.The effect of current transformer is that primary current larger for numerical value in a winding is converted to the less secondary current of numerical value in Secondary Winding by certain no-load voltage ratio.The larger current conversion of direct supply 101 can be that less electric current inputs the first electric conductor 2 and the second electric conductor 3 by this first current transformer 102; thus available protecting can be carried out to the external loading on the first electric conductor 2 and the second electric conductor 3, simultaneously on the first electric conductor 2 and the second electric conductor 3, less DC current is also convenient for measuring.
Further, as shown in Figures 2 and 3, the direct current output unit 1 in above-described embodiment also comprises switch 103, and switch 103 is series in the first loop 10, for first loop 10 that is turned on or off.The technical scheme that the present embodiment provides can be controlled the first the open close of loop 10 in real time by the switch 103 arranged, convenient working human users; In addition, in idle, also by switch 103, first loop 10 can be disconnected, 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 comprise the second current transformer 501 and reometer 502.The Secondary Winding of the second current transformer 501 and reometer 502 are connected in series and form second servo loop 20.A winding of the second current transformer 501 can be series between the first electric conductor 2 and the first electrode tip 11, also can be series between the second electric conductor 3 and the second electrode tip 12.
One, the winding that Fig. 2 shows the second current transformer 501 is arranged at a kind of embodiment between the first electric conductor 2 and the first electrode tip 11.One end of a winding of the second current transformer 501 is electrically connected with the first electric conductor 2, and the other end is electrically connected with the first electrode tip 11.In other words, the first electric conductor 2 is electrically connected with the first electrode tip 11 by the second current transformer 501, and a windings in series of the second current transformer 501 is between the first electric conductor 2 and the first electrode tip 11.
Two, the winding that Fig. 3 shows the second current transformer 501 is arranged at a kind of embodiment between the second electric conductor 3 and the second electrode tip 12.One end of a winding of the second current transformer 501 is electrically connected with the second electric conductor 3, and the other end is electrically connected with the second electrode tip 12.In other words, the second electric conductor 3 is electrically connected with the second electrode tip 12 by the second current transformer 501, and a windings in series of the second current transformer 501 is between the second electric conductor 3 and the second electrode tip 12.
In these two embodiments, when when carrying out earthing detection to outside circuit 4 to be measured, if outside circuit to be measured 4 has ground connection, then the first electric conductor 2 and the second electric conductor 3 all there is DC current to pass through, this first larger DC current can be converted into the second less DC current on the second servo loop 20 of Secondary Winding side under the effect of the second current transformer 501, this the second less DC current can meet the range requirement of reometer 502, facilitates reometer 502 to catch this second DC current and measure.
In actual applications, the reometer 502 in above-described embodiment can be pointer gauge or digital watch.
Specifically when implementing, the ground detection device that the utility model embodiment provides can also comprise coupling arrangement.As shown in Figure 4, coupling arrangement comprises insulating bar 6 and hook 7.Hook 7 is arranged at insulating bar 6, and hook 7 is made up of conductive material, and hook 7 is electrically connected with the first electric conductor 2.Hook 7 is for hanging on outside circuit to be measured 4 and being electrically connected with outside circuit 4 to be measured.First electric conductor 2 can be electrically connected by this hook 7 and outside circuit 4 to be measured.The technical scheme of the present embodiment passes through insulating bar 6 and the hook 7 of setting, the join domain of the first electric conductor 2 can be expanded, such as, when outside circuit to be measured 4 is very high, circuit 4 to be measured to first electric conductor 2 and the outside of eminence can be connected with hook 7 by insulating bar 6 by operating personnel, thus convenient working human users.
In actual applications, can arrange above-mentioned hook 7 in one end of insulating bar 6, the other end of insulating bar 6 is handheld terminal.During one end of the hand-held insulating bar 6 of operating personnel, hook 7 can be hung on outside circuit to be measured 4.Wherein, in order to improve the safe application performance of hook 7, the inner hollow of insulating bar 6, the first electric conductor 2 also realizes the electrical connection with hook 7 at the inner cabling of this insulating bar 6.
Further, as shown in Figures 2 and 3, the quantity of the coupling arrangement in above-described embodiment can be three.Specifically when implementing, because the outside three-phase overhead transmission line between adjacent two shaft towers has three transmission pressures, when operating personnel needs to carry out earthing detection to three transmission pressures of this three-phase overhead transmission line simultaneously, on the transmission pressure that operating personnel three of only needing the hook 7 of three coupling arrangements to be hung on respectively outside three-phase overhead transmission line are different, make each hook 7 and a transmission pressure one_to_one corresponding, and each hook 7 is all electrically connected with corresponding transmission pressure.When current detecting unit 5 has detected DC current, then illustrate in the three-phase overhead transmission line between this two shaft tower and had at least a transmission pressure to there is grounding phenomenon.The technical scheme that the present embodiment provides is by arranging three coupling arrangements, and can carry out earthing detection to three transmission pressures of the three-phase overhead transmission line of outside, detection efficiency is further enhanced simultaneously.
Further, the insulating bar 6 in above-described embodiment can be expansion link.The length of expansion link can free adjustment, can meet operating personnel's demand to the first electric conductor 2 connecting length under different execution conditions.
Specifically implement time, as shown in Figure 5 and Figure 6, the ground detection device in above-described embodiment can also comprise alarm unit 8, this alarm unit 8 for have DC current by time perform corresponding alarm response.Wherein, alarm unit 8 can be arranged between the first electric conductor 2 and the first electrode tip 11, also can be arranged between the second electric conductor 3 and the second electrode tip 12.
One, Fig. 5 shows alarm unit 8 and is arranged on a kind of embodiment between the first electric conductor 2 and the first electrode tip 11.One end of alarm unit 8 is electrically connected with the first electric conductor 2, and the other end of alarm unit 8 is electrically connected with the first electrode tip 11.In other words, the first electric conductor 2 is electrically connected with the first electrode tip 11 by alarm unit 8, and alarm unit 8 is series between the first electric conductor 2 and the first electrode tip 11.
Two, Fig. 6 shows alarm unit 8 and is arranged on a kind of embodiment between the second electric conductor 3 and the second electrode tip 12.One end of alarm unit 8 is electrically connected with the second electric conductor 3, and the other end of alarm unit 8 is electrically connected with the second electrode tip 12.In other words, the second electric conductor 3 is electrically connected with the second electrode tip 12 by alarm unit 8, and alarm unit 8 is series between the second electric conductor 3 and the second electrode tip 12.
By arranging alarm unit 8 in the technical scheme of these two embodiments, when alarm unit 8 performs corresponding alarm response, then illustrate in circuit to be measured to there is ground connection.The alarm unit 8 of this setting can allow operating personnel learn the result of detection in time, and operate more convenient, the experience of operating personnel is better.
In practical operation, above-mentioned alarm unit 8 can be hummer or alarm lamp.Such as, when have in circuit to be measured DC current by time, hummer sends sound signal or alarm lamp sends light signal.
Fig. 7 shows the schematic flow sheet of a kind of ground detecting method that another embodiment of the utility model provides.As shown in Figure 7, the executive agent of the method described in the present embodiment can be the ground detection device that above-described embodiment provides, concrete, and the method described in the present embodiment comprises:
Step 201, the first electrode tip of direct current output unit to be connected with outside line electricity to be measured by the first electric conductor.
Step 202, by the second electrode tip of described direct current output unit by the second electric conductor ground connection.
Step 203, detect the size of the DC current on described first electric conductor or described second electric conductor.
Here you need to add is that: the order of above-mentioned step 201 and step 202 can be put upside down, namely first the second electrode tip of direct current output unit can be passed through the second electric conductor ground connection, and then the first electrode tip of direct current output unit is connected with outside line electricity to be measured by the first electric conductor.
The above, it is only preferred embodiment of the present utility model, not any pro forma restriction is done to the utility model, the any simple modification done above embodiment according to technical spirit of the present utility model, equivalent variations and modification, all still belong in the scope of technical solutions of the utility model.

Claims (9)

1. a ground detection device, is characterized in that, comprising:
Direct current output unit, comprises the first electrode tip and the second electrode tip;
First electric conductor, its one end is electrically connected with described first electrode tip, and the other end is used for being connected with outside line electricity to be measured;
Second electric conductor, its one end is electrically connected with described second electrode tip, and the other end is used for ground connection; And
Whether current detecting unit, have DC current to pass through for detecting on described first electric conductor and/or described second electric conductor.
2. ground detection device as claimed in claim 1, is characterized in that,
Described direct current output unit comprises the first current transformer and direct supply;
A winding of described first current transformer and described direct supply are connected in series and form the first loop;
The two ends of the Secondary Winding of described first current transformer form described first electrode tip and described second electrode tip.
3. ground detection device as claimed in claim 2, it is characterized in that, described direct current output unit also comprises:
Switch, is series in described first loop, for described first loop that is turned on or off.
4. the ground detection device as described in any one of claims 1 to 3, is characterized in that, described current detecting unit comprises the second current transformer and reometer;
The Secondary Winding of described second current transformer and described reometer are connected in series and form second servo loop;
A winding of described second current transformer is arranged between described first electric conductor and described first electrode tip, and one end of a winding of described second current transformer is electrically connected with described first electric conductor, and the other end is electrically connected with described first electrode tip;
Or
A winding of described second current transformer is arranged between described second electric conductor and described second electrode tip, and one end of a winding of described second current transformer is electrically connected with described second electric conductor, and the other end is electrically connected with described second electrode tip.
5. the ground detection device as described in any one of claims 1 to 3, is characterized in that, also comprises coupling arrangement, and described coupling arrangement comprises:
Insulating bar; And
Hook, be arranged at described insulating bar, described hook is made up of conductive material, and described hook is electrically connected with described first electric conductor, for hanging on described outside circuit to be measured and being connected with described outside line electricity to be measured;
Described first electric conductor is connected with described outside line electricity to be measured by described hook.
6. ground detection device as claimed in claim 5, is characterized in that,
The quantity of described coupling arrangement is three, and the hook of three described coupling arrangements is configured to hang on respectively the different transmission pressure of three of outside three-phase overhead transmission line and is electrically connected with corresponding described transmission pressure.
7. ground detection device as claimed in claim 5, it is characterized in that, described insulating bar is expansion link.
8. the ground detection device as described in any one of claims 1 to 3, is characterized in that, also comprises:
Alarm unit, for have DC current by time perform corresponding alarm response;
Described alarm unit is arranged between described first electric conductor and described first electrode tip, and one end of described alarm unit is electrically connected with described first electric conductor, and the other end is electrically connected with described first electrode tip;
Or
Described alarm unit is arranged between described second electric conductor and described second electrode tip, and one end of described alarm unit is electrically connected with described second electric conductor, and the other end is electrically connected with described second electrode tip.
9. the ground detection device as described in any one of claims 1 to 3, is characterized in that,
Described first electric conductor and described second electric conductor are wire.
CN201420657683.3U 2014-11-05 2014-11-05 Ground detection device Withdrawn - After Issue CN204228876U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420657683.3U CN204228876U (en) 2014-11-05 2014-11-05 Ground detection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420657683.3U CN204228876U (en) 2014-11-05 2014-11-05 Ground detection device

Publications (1)

Publication Number Publication Date
CN204228876U true CN204228876U (en) 2015-03-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201420657683.3U Withdrawn - After Issue CN204228876U (en) 2014-11-05 2014-11-05 Ground detection device

Country Status (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104360216A (en) * 2014-11-05 2015-02-18 国家电网公司 Grounding detecting device and method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104360216A (en) * 2014-11-05 2015-02-18 国家电网公司 Grounding detecting device and method

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Granted publication date: 20150325

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