CN106569091A - Power distribution line earth fault point search system - Google Patents
Power distribution line earth fault point search system Download PDFInfo
- Publication number
- CN106569091A CN106569091A CN201610915723.3A CN201610915723A CN106569091A CN 106569091 A CN106569091 A CN 106569091A CN 201610915723 A CN201610915723 A CN 201610915723A CN 106569091 A CN106569091 A CN 106569091A
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- earth fault
- distribution line
- sender
- electrically connected
- pulse detector
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- 238000007689 inspection Methods 0.000 claims description 5
- 230000005611 electricity Effects 0.000 description 5
- 230000015556 catabolic process Effects 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 241001124569 Lycaenidae Species 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 210000001367 artery Anatomy 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000034994 death Effects 0.000 description 1
- 231100000517 death Toxicity 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000013399 early diagnosis Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Locating Faults (AREA)
Abstract
The invention belongs to the technical field of power distribution line earth fault point search and specifically relates to a power distribution line earth fault point search system. The invention is aimed at providing the power distribution line earth fault point search system which is simple in structure and convenient to use. The power distribution line earth fault point search system disclosed in the invention comprises a fault line, a transmitter and a pulse detector; an output end of the transmitter is electrically connected with the fault line, a signal input end of the pulse detector is electrically connected with the fault line, and an output end of the pulse detector is electrically connected with an alarm device.
Description
Technical field
The invention belongs to the technical field that distribution line earth fault is searched, and in particular to a kind of distribution line ground connection event
Barrier point lookup system.
Background technology
With the expanding day of distribution network systems scale, distribution line is increasing.Once break down on distribution line, palpus
Trouble point is found as early as possible, is fixed a breakdown, restore electricity.But, because lookup means fall behind trouble point is often difficult to quickly locate.
Rapidly trouble point is accurately found after line fault, not only to repairing circuit and fast recovery of power supply in time, and to entirely matching somebody with somebody
The safety and stability of net system and economical operation have highly important effect.
Singlephase earth fault is a kind of failure very common in distribution line failure, almost accounts for the 80% of whole fault types
On.Singlephase earth fault has following harm：1st, to the impact of line loss：The generation of singlephase earth fault can cause larger electricity
Can be lost, because distribution line Earth Phase is indirectly or directly to ground discharge, if reaching certain run time according to the rules (no
More than two hours), will so increase electric energy loss；2nd, to the harm of life entity：One kind of singlephase earth fault shows and is exactly
Wire lands, if there is wire landing, passer-by and circuit patrolman when ground connection distribution line is not out of service
(especially at night) is likely to result in person electric shock even generation of the accident such as injures and deaths, and other biological is likely to cause to get an electric shock
Casualty accident；3rd, to the harm of controller switching equipment：Singlephase earth fault occurs it may happen that intermittent orphan's light ground connection, so as to cause
Resonance overvoltage, overvoltage can make the insulator on circuit that insulation breakdown occurs, and cause serious short circuit accident, can also make part
Distribution transformer is burned out, it is also possible to burn spark gap and fuse so as to electrical fire occur；4th, to the harm of converting equipment：
In 10kV distribution lines, after there is singlephase earth fault, can detect on the voltage transformer of transformer station's 10kV buses
Zero-sequence current, while in open-delta, producing residual voltage；Due to the core sataration of voltage transformer, excitation can be increased
Electric current, if run time is longer to be possible to be burned out voltage transformer；After generation singlephase earth fault, several times can be also produced
In the resonance overvoltage of normal voltage, the insulating properties of converting equipment is endangered, can make converting equipment that insulation breakdown occurs when more serious,
Cause more major break down.
And, distribution network system mainly adopts the mode such as isolated neutral system and grounding through arc, in neutral point
Occur after singlephase earth fault in isolated neutral system, fault current is smaller, system can continue normal operation a period of time, no
Affect to customer power supply, but, prolonged operation can cause other more serious failures, destroy the safety fortune of system equipment
OK.Therefore trouble shoot positioning is quickly and accurately carried out, can technically ensures the safe operation of electrical network.
The content of the invention
The present invention overcomes the shortcomings of that prior art is present, and technical problem to be solved is：A kind of simple structure is provided, is made
System is searched with convenient distribution line earth fault.
In order to solve above-mentioned technical problem, the technical solution used in the present invention is：A kind of distribution line earth fault is looked into
System, including faulty line are looked for, is also included：Sender and pulse detector, the outfan of the sender and the fault wire
Road is electrically connected, and the signal input part of the pulse detector is electrically connected with the faulty line, the pulse detector
Outfan is electrically connected with alarm device.
Preferably, the pulse detector is mainly made up of hook portion and connecting portion, and the pulse detector is by described
Hook portion is hooked on the faulty line, and the pulse detector is fixedly connected by the connecting portion with insulating bar.
Preferably, one end of the insulating bar is fixedly connected with the connecting portion of the pulse detector, the alarm device
It is arranged at the other end of the insulating bar.
Preferably, the sender is arranged on automobile, and the power end of the sender electrically connects with the vehicle power of 12V
Connect.
Preferably, the sender is arranged on automobile, and the power end of the sender electrically connects with the accumulator of 12V
Connect.
Preferably, the outfan of the sender is electrically connected by adding electric terminal with the faulty line.
Preferably, the alarm device includes buzzer and display lamp.
Preferably, the pulse detector is CT detectors.
The present invention has the advantages that compared with prior art：
1st, distribution line earth fault of the invention searches system structure simply, mainly by sender and pulse detector
Constitute, when searching trouble point, sender injects high-voltage dc pulse in faulty line, and some phenomena of the failure in circuit are again
It is existing, fault current loop is constituted by ground connection, then using pulse detector along circuit query, by the induced signal of alarm
Whetheing there is can just accurately determine the position of failure generation, using very convenient.
2nd, the sender in the present invention is arranged on moving automobile, and pulse detector is arranged on insulating bar, can during work
According to actual needs, sender arbitrarily moved by moving automobile, pulse detector moved by hand-held insulating bar, using simple
Conveniently, it is easy to field engineering application.
3rd, in the present invention, the power supply of sender can be the vehicle power of 12V, alternatively the accumulator of 12V, whole device
Continuous electric energy power is stronger, for the workplace of bad environments, with very big practicality.
Description of the drawings
Below in conjunction with the accompanying drawings the present invention will be further described in detail.
Fig. 1 is the structural representation that a kind of distribution line earth fault that the embodiment of the present invention one is provided searches system；
Fig. 2 is the structure of sender in a kind of distribution line earth fault lookup system that the embodiment of the present invention one is provided
Schematic diagram；
In figure：1 is faulty line, and 2 is sender, and 3 is pulse detector, and 31 is hook portion, and 32 is connecting portion, and 4 are report
Alarm device, 5 is insulating bar, and 6 to add electric terminal, and 21 is housing, and 22 is high voltage output terminal, ground terminal based on 23, and 24 are electricity
Source input port, 25 is outer container grounding ports, and 26 is control circuit, and 27 are ground connection continuous detecting circuit, and 28 is the aging inspection of cable
Slowdown monitoring circuit, 29 is driving circuit, and 210 is the first bleeder circuit, and 211 is voltage display screen, and 212 is the second bleeder circuit, and 213 are
Voltage display control circuit, 214 are ground connection display screen, and 215 are ground connection display control circuit.
Specific embodiment
To make purpose, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than the embodiment of whole；Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Fig. 1 is the structural representation that a kind of distribution line earth fault that the embodiment of the present invention one is provided searches system,
Fig. 2 is the structural representation of sender in a kind of distribution line earth fault lookup system that the embodiment of the present invention one is provided,
As shown in Figure 1 and Figure 2, a kind of distribution line earth fault searches system, including faulty line 1, also includes：Sender 2 and arteries and veins
Detector 3 is rushed, the outfan of the sender 2 is electrically connected with the faulty line 1, and the signal of the pulse detector 3 is defeated
Enter end to be electrically connected with the faulty line 1, outfan and the alarm device 4 of the pulse detector 3 are electrically connected.
The distribution line earth fault of the present invention searches system structure simply, mainly by sender 2 and pulse detector 3
Constitute, when searching trouble point, sender 2 injects high-voltage dc pulse in faulty line 1, and some phenomena of the failure in circuit are again
It is existing, fault current loop is constituted by ground connection, then believed by the sensing of alarm 4 along circuit query using pulse detector 3
Number whetheing there is can just accurately determine the position of failure generation, using very convenient.
Specifically, the pulse detector 3 is mainly made up of hook portion 31 and connecting portion 32, and the pulse detector 3 leads to
Cross the hook portion 31 to be hooked on the faulty line 1, the pulse detector 3 is by the connecting portion 32 and insulating bar 5
It is fixedly connected.
Specifically, one end of the insulating bar 5 is fixedly connected with the connecting portion 32 of the pulse detector 3, the warning
Device 4 is arranged at the other end of the insulating bar 5.
Specifically, the sender 2 is arranged on automobile, and the power end of the sender 2 is electric with the vehicle power of 12V
Connection.
Specifically, the sender 2 is arranged on automobile, and the power end of the sender 2 electrically connects with the accumulator of 12V
Connect.
In the present invention, the power supply of sender 2 can be the vehicle power of 12V, alternatively the accumulator of 12V, whole device
Continuous electric energy power is stronger, for the workplace of bad environments, with very big practicality.
Sender 2 in the present invention is arranged on moving automobile, and pulse detector 3 is arranged on insulating bar 5, can during work
According to actual needs, sender 2 is arbitrarily moved by moving automobile, pulse detector 3 is moved by hand-held insulating bar 5, used
It is simple and convenient, be easy to field engineering application.
Specifically, the outfan of the sender 2 is electrically connected by adding electric terminal 6 with the faulty line 1.
Specifically, the alarm device 4 includes buzzer and display lamp.
Specifically, the pulse detector 3 is CT detectors.
Correspondingly, the sender 2 in the present embodiment, it may include housing 21, can be provided with high-voltage output end on the housing 21
High-pressure generating circuit can be provided with son 22, main ground terminal 23 and power input port 24, the housing 21, the high pressure occurs
Circuit may include transformator T1, high-voltage rectifying loop ZL, electric capacity C1, resistance R1 and transmit switch SW1, and the transformator T1's is defeated
Enter end be electrically connected with the power input port 24, the output of the transformator T1 with the high-voltage rectifying loop ZL1's
Input is electrically connected, and the electric capacity C1 is attempted by the outfan of the high-voltage rectifying loop ZL, the high-voltage rectifying loop ZL1
Positive output end be sequentially connected in series the resistance R1, it is described transmit switch SW1 after be electrically connected with the high voltage output terminal 22, institute
State the negative output terminal of high-voltage rectifying loop ZL, the earth terminal for transmitting switch SW1 electrically to connect with the main ground terminal 23
Connect.
Specifically, can also be provided with the housing 21 in outer container grounding ports 25, the housing 21 can also be provided with control electricity
Road 26, ground connection continuous detecting circuit 27, cable burn-in test circuit 28 and driving circuit 29, the outer container grounding ports 25 and institute
The negative terminal electrical connection of power input port 24 is stated, between the outer container grounding ports 25 and the main ground terminal 23 and is connected to
First bleeder circuit 210, the outfan of first bleeder circuit 210 is by the ground connection continuous detecting circuit 27 and the control
The input electrical connection of circuit processed 26, the input of the control circuit 26 is also defeated with the cable burn-in test circuit 28
Go out end electrical connection, the input of the cable burn-in test circuit 28 and a CT harvesters CT1 are electrically connected, described first
CT harvester CT1 are arranged on the cable run between the high voltage output terminal 22 and the housing 21, the control circuit
The input of 26 outfan and the driving circuit 29 is electrically connected, the outfan of the driving circuit 29 and the transformator
The input electrical connection of T1, the outfan of the control circuit 26 is also electrically connected with start stop switch A1, the start stop switch
A1 is serially connected on the positive input circuit of the transformator T1.
Specifically, can also be provided with the housing 21 in voltage display screen 211, the housing 21 and be additionally provided with the second partial pressure electricity
Road 212 and voltage display control circuit 213, the input of second bleeder circuit 212 and the resistance R1 and described transmit
Line electrical connection between switch SW1, the outfan of second bleeder circuit 212 and the voltage display control circuit
213 input electrical connection, the input of the outfan of the voltage display control circuit 213 and the voltage display screen 211
End electrical connection, the earth terminal of the earth terminal of the voltage display control circuit 213 and second bleeder circuit 212 is and institute
State outer container grounding ports 25 to be electrically connected.
Specifically, ground connection display screen 214 can be also provided with the housing 21, the 2nd CT collections is additionally provided with the housing 21
Device CT2 and ground connection display control circuit 215, the 2nd CT harvester CT2 are arranged on and described transmit switch SW1 and the master connects
On circuit between ground terminal 23, the 2nd CT harvesters CT2 is electric with the input of the ground connection display control circuit 215
Connection, the outfan of the ground connection display control circuit 215 is electrically connected with the input of the ground connection display screen 214.
Specifically, the power input port 24 can be electrically connected with outside 12V DC sources.
Specifically, the 12V DC sources of the outside can be vehicle power, or can be accumulator.
Specifically, the resistance of the resistance R1 can be 2.5K Ω.
Specifically, the capacitance of the electric capacity C1 can be 2 μ F.
In the present embodiment, with direct current 12V as power supply, boosted by high-pressure generating circuit, be charged to electric capacity C1, by transmitting
Switch SW1 periodically delivers letters direct current high voltage pulses to distribution line, deliver letters interval can for 2S or 6S, the voltage of generation be 5KV,
10KV, 15KV, can be according to free switching in three electric pressures of circuit practical situation here.
In the present embodiment, the control circuit 26 can be by receiving the ground connection continuous detecting circuit 27 and the aging inspection of cable
The signal that both slowdown monitoring circuits 28 send, the intensity transmitted come dynamic adjustment by the driving circuit 29 and various parameters, from
And various interference signals are effectively shielded, greatly improve the identification accuracy rate of CT detectors.
Of the invention to have measurement signal voltages grade high, security reliability is high, it is little that line facility is affected, use simple side
Just, it is easy to the advantage of field engineering application, it is adaptable to which 10KV distribution lines earth fault is investigated, and especially can investigate earth resistance not
Difficult high resistance earthing fault more than 20K Ω, has very high practicability in power distribution network field failure investigation.This device is to distribution
On the basis of line-to-ground fault reason is analyzed, by the way that very intuitively method judges abort situation, for general line
Hunting attendant in road can quickly and easily find out abort situation without very high technical requirements.Filled by using this detection
Put, can make to investigate distribution line failure and early diagnosiss in time, effectively protect power system safety and stability operation.
Finally it should be noted that：Various embodiments above only to illustrate technical scheme, rather than a limitation；To the greatest extent
Pipe has been described in detail with reference to foregoing embodiments to the present invention, it will be understood by those within the art that：Its according to
So the technical scheme described in foregoing embodiments can be modified, either which part or all technical characteristic are entered
Row equivalent；And these modifications or replacement, do not make the essence disengaging various embodiments of the present invention technology of appropriate technical solution
The scope of scheme.
Claims (8)
1. a kind of distribution line earth fault searches system, including faulty line (1), it is characterised in that：Also include：Sender
(2) and pulse detector (3), outfan and the faulty line (1) electrical connection of the sender (2), the pulse inspection
The signal input part and the faulty line (1) for surveying device (3) is electrically connected, outfan and the warning of the pulse detector (3)
Device (4) is electrically connected.
2. a kind of distribution line earth fault according to claim 1 searches system, it is characterised in that：The pulse inspection
Survey device (3) to be mainly made up of hook portion (31) and connecting portion (32), the pulse detector (3) is by hook portion (31) hook
Hang on the faulty line (1), the pulse detector (3) is fixedly connected by the connecting portion (32) with insulating bar (5).
3. a kind of distribution line earth fault according to claim 2 searches system, it is characterised in that：The insulating bar
(5) one end is fixedly connected with the connecting portion (32) of the pulse detector (3), and the alarm device (4) is arranged at described exhausted
The other end of edge rod (5).
4. a kind of distribution line earth fault according to claim 1 searches system, it is characterised in that：The sender
(2) it is arranged on automobile, the power end of the sender (2) is electrically connected with the vehicle power of 12V.
5. a kind of distribution line earth fault according to claim 1 searches system, it is characterised in that：The sender
(2) it is arranged on automobile, the power end of the sender (2) is electrically connected with the accumulator of 12V.
6. a kind of distribution line earth fault according to claim 1 searches system, it is characterised in that：The sender
(2) outfan is electrically connected by adding electric terminal (6) and the faulty line (1).
7. a kind of distribution line earth fault according to claim 1 searches system, it is characterised in that：The dress of reporting to the police
(4) are put including buzzer and display lamp.
8. a kind of distribution line earth fault according to claim 1 searches system, it is characterised in that：The pulse inspection
It is CT detectors to survey device (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610915723.3A CN106569091A (en) | 2016-10-20 | 2016-10-20 | Power distribution line earth fault point search system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610915723.3A CN106569091A (en) | 2016-10-20 | 2016-10-20 | Power distribution line earth fault point search system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106569091A true CN106569091A (en) | 2017-04-19 |
Family
ID=60414219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610915723.3A Pending CN106569091A (en) | 2016-10-20 | 2016-10-20 | Power distribution line earth fault point search system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106569091A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0915292A (en) * | 1995-06-28 | 1997-01-17 | Chubu Electric Power Co Inc | Transmission and distribution line fault detector |
| JP2004317349A (en) * | 2003-04-17 | 2004-11-11 | Nippon Kouatsu Electric Co | Failure point detection device |
| CN102608484A (en) * | 2012-03-14 | 2012-07-25 | 北京中电欧亚科技有限公司 | Fault indictor for power distribution lines |
| CN206114826U (en) * | 2016-10-20 | 2017-04-19 | 国网山西省电力公司临汾供电公司 | Distribution lines earth fault point seek system |
-
2016
- 2016-10-20 CN CN201610915723.3A patent/CN106569091A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0915292A (en) * | 1995-06-28 | 1997-01-17 | Chubu Electric Power Co Inc | Transmission and distribution line fault detector |
| JP2004317349A (en) * | 2003-04-17 | 2004-11-11 | Nippon Kouatsu Electric Co | Failure point detection device |
| CN102608484A (en) * | 2012-03-14 | 2012-07-25 | 北京中电欧亚科技有限公司 | Fault indictor for power distribution lines |
| CN206114826U (en) * | 2016-10-20 | 2017-04-19 | 国网山西省电力公司临汾供电公司 | Distribution lines earth fault point seek system |
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Application publication date: 20170419 |