CN110161353A - A kind of fault locator and method - Google Patents
A kind of fault locator and method Download PDFInfo
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- CN110161353A CN110161353A CN201910363709.0A CN201910363709A CN110161353A CN 110161353 A CN110161353 A CN 110161353A CN 201910363709 A CN201910363709 A CN 201910363709A CN 110161353 A CN110161353 A CN 110161353A
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- pulse voltage
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- 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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- 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
- G01R31/088—Aspects of digital computing
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- 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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- Locating Faults (AREA)
Abstract
The application discloses a kind of fault locator and method, for the fault point after singlephase earth fault occurs, including ceramic condenser divider and pulse voltage signal detection device, ceramic condenser divider includes the first ceramic condenser and the second ceramic condenser, the input terminal and single phase poaer supply connection of first ceramic condenser, the output end of first ceramic condenser is connected with the input terminal of the second ceramic condenser, the output end ground connection of the second ceramic condenser；Pulse voltage signal detection device includes pulse voltage detection module, timing module and processing module, and pulse voltage detection module is in parallel with the second ceramic condenser, the output end ground connection of pulse voltage detection module；Timing module is used for when pulse voltage detection module detects pulse voltage signal, and record detects the time of the wave head of pulse voltage signal；Processing module is used for the time difference according to pulse voltage signal and catadioptric signal, fault point.The application can improve the positioning accuracy and efficiency of fault point.
Description
Technical field
This application involves distribution network technology field more particularly to a kind of fault locators and method.
Background technique
It in distribution line, often will appear singlephase earth fault, therefore after the failure occurred, need fault point,
To check and solve failure as early as possible, guarantee the safe and stable operation of power distribution network.Existing method for locating single-phase ground fault master
There are impedance method, traveling wave method and outdoor fault point detection method etc., these methods have relied on failure and front and back power distribution network ginseng occurs
Several variations, however due to the topological structure of power distribution network complexity, the reasons such as the method for operation is changeable, and cable is mixed with overhead line are led
Cause the power distribution network parameter acquisition procedure in actual implementation complex, fault location low efficiency.
Summary of the invention
The application provides a kind of fault locator and method, to solve Single-phase Ground Connection Failure positioning effect in distribution line
The low problem of rate.
In a first aspect, the application provides a kind of fault locator, for the positioning failure after singlephase earth fault generation
Point, including ceramic condenser divider and pulse voltage signal detection device, the ceramic condenser divider include the first ceramic electrical
Hold and the second ceramic condenser, the input terminal and single phase poaer supply connection of the first ceramic condenser, the output end of the first ceramic condenser
It connects with the input terminal of the second ceramic condenser, the output end ground connection of the second ceramic condenser；The pulse voltage signal detection device
Including pulse voltage detection module, timing module and processing module, pulse voltage detection module is in parallel with the second ceramic condenser, arteries and veins
Rush the output end ground connection of voltage detection module；Timing module is used to detect pulse voltage signal when pulse voltage detection module
When, record detects the time of the wave head of the pulse voltage signal；Processing module be used for according to the pulse voltage signal with
Time difference of the pulse voltage signal between the catadioptric signal of fault point, fault point.
Optionally, the fault locator further includes pulse voltage signal generator, pulse voltage signal generator with
The single phase poaer supply connection of non-faulting side is used for the fault locator input pulse voltage signal.
Optionally, the capacitance range of the first ceramic condenser is 1nf-100nf, and the capacitance range of the second ceramic condenser is
200uf-1000uf。
Optionally, tie point, the tie point and the arteries and veins are provided between the first ceramic condenser and the second ceramic condenser
Rush the input terminal connection of voltage detection module.
Optionally, the processing module be also used to show detect the number of pulse voltage signal, the time difference and
Fault location result.
Second aspect, the application provide a kind of Fault Locating Method, for fault locator as described in relation to the first aspect,
Described method includes following steps:
On the single phase poaer supply route of non-faulting side, Xiang Suoshu fault locator input pulse voltage signal；
When pulse voltage detection module detects the wave head of pulse voltage signal, timing module records the pulse voltage
The corresponding first pulse detection time t1 of signal；
Fault point is encountered during the pulse voltage signal is propagated on single phase poaer supply route, pulse voltage detects mould
Block detects pulse voltage catadioptric signal；
Timing module records the corresponding second pulse detection time t2 of the pulse voltage catadioptric signal；
Processing module is fixed according to the time difference Δ t between the first pulse detection time t1 and the second pulse detection time t2
Position fault point.
Optionally, the fault point, comprising:
According to the time difference Δ t, the distance between the fault point and pulse voltage signal detection device are calculated；
According to the distance between the fault point and pulse voltage signal detection device, determine the fault point in single-phase electricity
The location of on the route of source.
In technical solution described herein, it is based in ceramic condenser divider, the first ceramic condenser and the second ceramic electrical
Coupling between appearance couples pulse voltage detection module for pulse voltage signal, and examines in pulse voltage detection module
When measuring the wave head of pulse voltage signal, by the corresponding signal detection time of timing module synchronous recording.The application is provided
Fault locator, pulse voltage signal generator issue pulse voltage signal can along single phase poaer supply route, a part into
Enter ceramic condenser divider, another part continues along single phase poaer supply line propagation, when encounter occur on single phase poaer supply route it is single-phase
When the fault point of ground fault, since fault point resistance is uneven, it can make partial pulse voltage signal that catadioptric occur, it is catadioptric
The pulse voltage signal penetrated can return to and input ceramic condenser divider, and be received by pulse voltage detection module, meter at this time
When module will record the detection time of preceding pulsatile once voltage signal and the detection time of catadioptric signal, then by two examine
The time difference for surveying the time, fault point corresponding to the catadioptric signal can be positioned.The application can utilize the coupling function of capacitor,
The coupled voltages signal directly from high-tension distributing line, fault locator is simple, easy to carry, and ceramics have good insulation
Property, therefore divider is safe to use, can be realized the detection of pulse voltage signal, to improve the positioning accurate of fault point
Degree and efficiency.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the structural schematic diagram of the fault locator shown in the embodiment of the present application one；
Fig. 2 is the flow chart of the Fault Locating Method shown in the embodiment of the present application two.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Whole description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As shown in Figure 1, the embodiment of the present application one provides a kind of fault locator, for after singlephase earth fault generation
Fault point, including ceramic condenser divider 1 and pulse voltage signal detection device 2, ceramic condenser divider 1 include first
Ceramic condenser 11 and the second ceramic condenser 12, the input terminal of the first ceramic condenser 11 are connect with single phase poaer supply route 4, the first ceramics
The output end of capacitor 11 is connected with the input terminal of the second ceramic condenser 12, the output end ground connection of the second ceramic condenser 12；Pulse electricity
Pressing signal supervisory instrument 2 includes pulse voltage detection module 21, timing module 22 and processing module 23, the first ceramic condenser 11 with
Tie point 13, the input terminal company of tie point 13 and pulse voltage detection module 21 can be set between second ceramic condenser 12
It connects, the output end ground connection of pulse voltage detection module 21, to realize pulse voltage detection module 21 and the second ceramic condenser 12
Parallel connection, timing module 22 is used for when pulse voltage detection module 21 detects pulse voltage signal, and record detects described
The time of the wave head of pulse voltage signal；Processing module 23 is used for according to the pulse voltage signal and the pulse voltage signal
Time difference between the catadioptric signal of fault point, fault point.
Since pulse voltage detection module 21 is in parallel with the second ceramic condenser 12, then the voltage of the second ceramic condenser 12 is
Voltage comprising pulse voltage signal, according to series capacitance voltage divider principle, the voltage of the second ceramic condenser 12 can pass through following formula meter
It calculates:
In formula, UphBy the phase voltage for the single phase poaer supply route 4 that ceramic condenser divider 1 connects；UC2For the second ceramic condenser
12 voltage；C1For the capacitance of the first ceramic condenser 11；C2For the second ceramic condenser C2Capacitance.Optionally, the first ceramics
The capacitor C of capacitor 111Range is 1nf-100nf, the capacitor C of the second ceramic condenser 122Range is 200uf-1000uf, electric herein
Hold in range, the accurate detection and the accurate positioning of fault point of pulse voltage signal may be implemented.
I.e. the present embodiment is based in ceramic condenser divider 1, the first ceramic condenser 11 and the second ceramic condenser 12 it
Between coupling, couple pulse voltage detection module 21 for pulse voltage signal, and examine in pulse voltage detection module 21
When measuring the wave head of pulse voltage signal, by the corresponding signal detection time of 22 synchronous recording of timing module.In specific implementation,
The fault locator may also include pulse voltage signal generator 3, referring to Fig.1, pulse voltage signal generator 3 and non-event
The single phase poaer supply route 4 for hindering side connects, and is used for the fault locator input pulse voltage signal, so as to subsequent progress event
Barrier positioning.
When singlephase earth fault occurs in single phase poaer supply route 4, by field service personnel in the way of Fig. 1, by event
Barrier positioning device installs, then starting impulse voltage signal generator 3, the pulse electricity that pulse voltage signal generator 3 issues
Press signal can be along single phase poaer supply route 4 (i.e. single-phase high-tension distributing line), a part enters ceramic condenser divider 1, another
Part continues to propagate along single phase poaer supply route 4, when encountering the fault point that singlephase earth fault occurs on single phase poaer supply route 4,
Since fault point resistance is uneven, it can make partial pulse voltage signal that catadioptric, the pulse voltage signal meeting of catadioptric occur
Ceramic condenser divider 1 is returned and inputted, and is received by pulse voltage detection module 21, before timing module 22 at this time will record
The detection time of the detection time of pulsatile once voltage signal and the catadioptric signal, then by the time of two detection times
Difference can position fault point corresponding to the catadioptric signal.Technical solution described in the present embodiment can utilize the coupling function of capacitor
Can, the coupled voltages signal directly from high-tension distributing line, fault locator is simple, carries and installation is very convenient, pottery
Porcelain has good insulating properties, therefore divider is safe to use, can be realized the detection of pulse voltage signal, to mention
The positioning accuracy and efficiency of high fault point.
Optionally, the processing module 23 can also have display other than having the function of calculating with fault point
Function, be also used to will test the number of pulse voltage signal, the time difference and the fault location that obtains after calculating as a result,
Shown on the surface of fault locator, facilitate field service personnel to check and obtain required fault location as a result, from
And the efficiency of fault location is improved, quickly to check and eliminate failure, guarantee the safe and stable operation of power distribution network.
Accordingly, as shown in Fig. 2, the embodiment of the present application two provides a kind of Fault Locating Method, for such as one institute of embodiment
The fault locator stated, the method specifically comprise the following steps:
Step S101, on the single phase poaer supply route of non-faulting side, Xiang Suoshu fault locator input pulse voltage signal；
Step S102, when pulse voltage detection module detects the wave head of pulse voltage signal, timing module records institute
State the corresponding first pulse detection time t1 of pulse voltage signal；
Step S103 encounters fault point, pulse during the pulse voltage signal is propagated on single phase poaer supply route
Voltage detection module detects pulse voltage catadioptric signal；
Step S104, timing module record the corresponding second pulse detection time t2 of the pulse voltage catadioptric signal；
Step S105, processing module is according to the time between the first pulse detection time t1 and the second pulse detection time t2
Poor Δ t, fault point.Wherein, Δ t=t2-t1.
It, can be according to time difference Δ t, in conjunction with biography of the pulse voltage signal in single phase poaer supply route 4 for step S105
Speed v is broadcast, the distance between fault point and pulse voltage signal detection device 2 Δ S are calculated, Δ S=v × Δ t/2 thus can
Fault point is determined in the specific location of single phase poaer supply route, to complete fault location process according to distance, delta S.
Same and similar part reference mutually between each embodiment in this specification, therefore embodiment two is no longer superfluous
It states.
Those skilled in the art after considering the specification and implementing the invention disclosed here, will readily occur to of the invention its
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the invention, these modifications, purposes or
Person's adaptive change follows general principle of the invention and including the undocumented common knowledge in the art of the present invention
Or conventional techniques.The description and examples are only to be considered as illustrative, and true scope and spirit of the invention are by appended
Claim is pointed out.
It should be understood that the present invention is not limited to the precise structure already described above and shown in the accompanying drawings, and
And various modifications and changes may be made without departing from the scope thereof.The scope of the present invention is limited only by the attached claims.
Claims (7)
1. a kind of fault locator, for the fault point after singlephase earth fault generation, which is characterized in that including ceramics
Capacitive divider (1) and pulse voltage signal detection device (2), the ceramic condenser divider (1) include the first ceramic condenser
(11) it is connect with the second ceramic condenser (12), the input terminal of the first ceramic condenser (11) with single phase poaer supply route (4), the first ceramics
The output end of capacitor (11) is connected with the input terminal of the second ceramic condenser (12), the output end ground connection of the second ceramic condenser (12)；
The pulse voltage signal detection device (2) includes pulse voltage detection module (21), timing module (22) and processing module
(23), pulse voltage detection module (21) is in parallel with the second ceramic condenser (12), the output end of pulse voltage detection module (21)
Ground connection；Timing module (22) is used for when pulse voltage detection module (21) detects pulse voltage signal, and record detects institute
State the time of the wave head of pulse voltage signal；Processing module (23) is used for according to the pulse voltage signal and the pulse voltage
Time difference of the signal between the catadioptric signal of fault point, fault point.
2. fault locator according to claim 1, which is characterized in that it further include pulse voltage signal generator (3),
Pulse voltage signal generator (3) is connect with the single phase poaer supply route (4) of non-faulting side, for defeated to the fault locator
Enter pulse voltage signal.
3. fault locator according to claim 1, which is characterized in that the capacitance range of the first ceramic condenser (11) is
1nf-100nf, the capacitance range of the second ceramic condenser (12) are 200uf-1000uf.
4. fault locator according to claim 1-3, which is characterized in that the first ceramic condenser (11) and the
It is provided between two ceramic condensers (12) tie point (13), the tie point (13) and the pulse voltage detection module (21)
Input terminal connection.
5. fault locator according to claim 1-3, which is characterized in that the processing module (23) is also used
Number, the time difference and the fault location result of pulse voltage signal are detected in display.
6. a kind of Fault Locating Method is used for fault locator as described in any one in claim 1-5, which is characterized in that
Include the following steps:
On the single phase poaer supply route of non-faulting side, Xiang Suoshu fault locator input pulse voltage signal；
When pulse voltage detection module detects the wave head of pulse voltage signal, timing module records the pulse voltage signal
Corresponding first pulse detection time t1；
Fault point, the inspection of pulse voltage detection module are encountered during the pulse voltage signal is propagated on single phase poaer supply route
Survey pulse voltage catadioptric signal；
Timing module records the corresponding second pulse detection time t2 of the pulse voltage catadioptric signal；
Processing module is according to the time difference Δ t between the first pulse detection time t1 and the second pulse detection time t2, positioning event
Barrier point.
7. according to the method described in claim 6, it is characterized in that, the fault point, comprising:
According to the time difference Δ t, the distance between the fault point and pulse voltage signal detection device are calculated；
According to the distance between the fault point and pulse voltage signal detection device, determine the fault point in single phase poaer supply line
The location of road.
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Cited By (4)
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| CN111175610A (en) * | 2020-02-06 | 2020-05-19 | 云南电网有限责任公司电力科学研究院 | Fault positioning system and method for distribution line |
| CN111190075A (en) * | 2020-02-06 | 2020-05-22 | 云南电网有限责任公司电力科学研究院 | Distribution line fault positioning method based on pulse signal injection |
| CN112379220A (en) * | 2020-10-27 | 2021-02-19 | 云南电网有限责任公司临沧供电局 | Ground fault positioning system and method based on distribution transformer injection pulse |
| CN113311286A (en) * | 2021-04-07 | 2021-08-27 | 国网江苏省电力有限公司徐州供电分公司 | Cable fault detection method based on radio frequency signal injection |
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| CN113311286A (en) * | 2021-04-07 | 2021-08-27 | 国网江苏省电力有限公司徐州供电分公司 | Cable fault detection method based on radio frequency signal injection |
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Application publication date: 20190823 |