CN106291256A - A kind of T-type line fault localization system and method - Google Patents
A kind of T-type line fault localization system and method Download PDFInfo
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- CN106291256A CN106291256A CN201610871753.9A CN201610871753A CN106291256A CN 106291256 A CN106291256 A CN 106291256A CN 201610871753 A CN201610871753 A CN 201610871753A CN 106291256 A CN106291256 A CN 106291256A
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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
- G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead
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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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Abstract
The invention discloses a kind of T-type line fault localization system, including: the first detection device and second detection device at two end points of the basic routing line being separately positioned on T-shaped transmission line of electricity；It is arranged on the branched line of T-shaped transmission line of electricity and away from the 3rd detection device at the basic routing line end points with branched line joint；It is arranged on the branched line of T-shaped transmission line of electricity and the 4th detection device at the end points of this joint neighbouring；Communicate to connect with each detection device, determine faulty line for the fault traveling wave Mintrop wave polarity collected according to the 3rd detection device and the 4th detection device, and according to single line distributed fault distance-finding method, faulty line is carried out the processing means of fault location.Decrease the quantity of detection device, reduce fault localization cost, it is not necessary to utilize reflected wave information, improve Range finding reliability, there is not blind area.Correspondingly also disclosing a kind of T-type line fault distance-finding method, effect is identical with this system, does not repeats them here.
Description
Technical field
The present invention relates to transmission system intelligent diagnostics field, particularly relate to a kind of T-type line fault localization system and side
Method.
Background technology
Along with the high speed development of electric power networks, the application of T-shaped transmission line of electricity is more and more extensive.But, due to T-type line electricity
Power conveying capacity is strong, and load is big, once breaks down and is likely to result in the consequence even more serious than conventional electrical power lines road.
But, relatively lag behind for the more conventional circuit of T-type line Fault Locating Method.At present, conventional T-type line fault
Localization method is the most at least to install two set detection devices on each branched line of T-type line, utilizes head wave energy to judge
Fault branch, the fault traveling wave utilizing the detection device on fault branch to receive further determines that fault section, calculates fault
Distance.But, the method is mounted with too much detection device thus improves fault localization cost, and meanwhile, the method needs profit
Use reflected wave information, when circuit is short-circuited fault, faint by end points (or branch point) reflected energy of trouble point,
Cause detection difficult.
Therefore, how to reduce the cost of T-type line fault localization, can simpler exactly trouble point be carried out simultaneously
Location, is that those skilled in the art are presently required and solve the technical problem that.
Summary of the invention
It is an object of the invention to provide a kind of T-type line fault localization system and method, T-type line fault can be reduced and survey
Away from cost, can simpler exactly trouble point be positioned simultaneously.
For solving above-mentioned technical problem, the technical scheme is that
A kind of T-type line fault localization system, including: it is separately positioned on two ends of the basic routing line of T-shaped transmission line of electricity
The first detection device and second detection device at Dian；It is arranged on the branched line of described T-shaped transmission line of electricity and away from described
The 3rd detection device at the end points of basic routing line and branched line joint；It is arranged on the branch line of described T-shaped transmission line of electricity
The 4th detection device on road and at the end points of neighbouring described basic routing line and described branched line joint；With described first inspection
Survey device, second detection device, the 3rd detection device and the 4th detection device communication connection, for according to described 3rd detection dress
Put the fault traveling wave Mintrop wave polarity collected with the 4th detection device and determine faulty line, and survey according to single line distributed fault
Away from method, described faulty line is carried out the processing means of fault location.
Preferably, described processing means is master station main frame.
A kind of T-type line fault distance-finding method, including:
The first detection device and the second detection it is respectively provided with in advance at two end points of the basic routing line of T-shaped transmission line of electricity
Device, is arranged on the branched line of described T-shaped transmission line of electricity and away from the basic routing line end points with branched line joint
3rd detection device；On the branched line of described T-shaped transmission line of electricity and adjacent to basic routing line and the end of branched line joint
4th detection device is set at Dian；
Event is determined according to the fault traveling wave Mintrop wave polarity that described 3rd detection device and described 4th detection device are gathered
Barrier circuit；
According to single line distributed fault distance-finding method, described faulty line is carried out fault location.
Preferably, the fault traveling wave Mintrop wave polarity gathered according to described 3rd detection device and described 4th detection device
Determine faulty line, including:
Judge the polarity of fault traveling wave Mintrop wave that described 3rd detection device and described 4th detection device gathered whether
Identical；
The most then judge that described basic routing line is as faulty line；
If it is not, then judge that described branched line is as faulty line.
Preferably, when described basic routing line is faulty line, according to single line distributed fault distance-finding method to described event
Barrier circuit carries out fault location, including:
The speed v of calculating fault traveling wave:
Calculate trouble point distance L away from described first detection deviceAx:
Wherein, LBDIt is the distance of the 3rd detection device to the 4th detection device, LACIt is that the first detection device is to the second detection
The distance of device；tA, tB, tC, tDRepresent the first detection device, the 4th detection device, second detection device and the 3rd detection respectively
Device detects the time of fault traveling wave Mintrop wave wave head.
Preferably, when described branched line is faulty line, according to single line distributed fault distance-finding method to described event
Barrier circuit carries out fault location, including:
The speed v of calculating fault traveling wave:Or
Calculate trouble point distance L away from described 4th detection deviceBx:
Wherein, LBCIt is the 4th detection device to the distance of second detection device, LABIt is that the first detection device is to the 4th detection
The distance of device, LBDIt is the distance of the 3rd detection device to the 4th detection device, tA, tB, tC, tDRepresent the first detection dress respectively
Put, the 4th detection device, second detection device and the 3rd detect device and the time of fault traveling wave Mintrop wave wave head detected.
Compared with prior art, technique scheme has the advantage that
The T-type line fault localization system that the embodiment of the present invention is provided, including: it is separately positioned on T-shaped transmission line of electricity
The first detection device and second detection device at two end points of basic routing line；It is arranged on the branched line of T-shaped transmission line of electricity
Above and away from the 3rd at the basic routing line end points with branched line joint detect device；It is arranged on dividing of T-shaped transmission line of electricity
The 4th detection device on branch line and at the end points of neighbouring basic routing line and branched line joint；With first detection device,
Second detection device, the 3rd detection device and the 4th detection device communication connection, for according to the 3rd detection device and the 4th inspection
The fault traveling wave Mintrop wave polarity that survey device is collected determines faulty line, and according to single line distributed fault distance-finding method to event
Barrier circuit carries out the processing means of fault location.Use this system, only need according to two the detection dresses being arranged on branched line
The Mintrop wave polarity putting detected fault traveling wave i.e. can determine that faulty line, and according to single line distributed fault distance-finding method pair
Faulty line carries out localization of fault, only need to install four set detection devices, decrease the number of detection device in T-type line
Amount, reduces fault localization cost, is not required to utilize reflected wave information simultaneously, improve the reliability of range finding, there is not measurement dead
District.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is the present invention
Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to according to
These accompanying drawings obtain other accompanying drawing.
The T-type line fault localization system that Fig. 1 is provided by a kind of detailed description of the invention of the present invention detects the peace of device
Dress schematic diagram；
A kind of T-type line fault distance-finding method flow chart that Fig. 2 is provided by one embodiment of the present invention.
Detailed description of the invention
The core of the present invention is to provide a kind of T-type line fault localization system and method, can reduce T-type line fault and survey
Away from cost, can simpler exactly trouble point be positioned simultaneously.
Understandable, below in conjunction with the accompanying drawings to this in order to enable the above-mentioned purpose of the present invention, feature and advantage to become apparent from
Bright detailed description of the invention is described in detail.
Elaborate detail in the following description so that fully understanding the present invention.But the present invention can with multiple not
Being same as alternate manner described here to implement, those skilled in the art can do class in the case of intension of the present invention
Like promoting.Therefore the present invention is not limited by following public detailed description of the invention.
Refer to the T-type line fault localization system that Fig. 1, Fig. 1 are provided by a kind of detailed description of the invention of the present invention is examined
Survey the scheme of installation of device.
A kind of detailed description of the invention of the present invention provides a kind of T-type line fault localization system, including: it is separately positioned on
The first detection device A and second detection device C at two end points of the basic routing line of T-shaped transmission line of electricity；It is arranged on T-shaped transmission of electricity
On the branched line of circuit and away from the 3rd detection device D at the basic routing line end points with branched line joint；It is arranged on T
The 4th detection device B on the branched line of type transmission line of electricity and at the end points of neighbouring basic routing line and branched line joint；
With the first detection device A, second detection device C, the 3rd detection device D and the 4th detection device B communication connection, for according to the
The fault traveling wave Mintrop wave polarity that three detection device D and the 4th detection device B are collected determines faulty line, and divides according to single line
Cloth fault distance-finding method carries out the processing means of fault location to faulty line.
In the present embodiment, preferred process device is master station main frame.In the present embodiment, due to the first detection
Device, second detection device, the 3rd detection device are separately positioned at three end points of T-type line, wherein, and the 4th detection device
On the branched line of T-shaped transmission line of electricity and at the end points of neighbouring basic routing line and branched line joint, refer to such as Fig. 1
Shown in, the 4th detection device is arranged on branched line one end of neighbouring basic routing line, and the i.e. the 4th detection device is arranged on branch
On circuit, and its distance basic routing line and branched line joint are near as far as possible, but the position of the 4th detection device is not
Overlap with basic routing line and branched line joint, this make the detection for T-type line without dead band, any in this T-type line
At one, break down in place, then the fault traveling wave signal that this trouble point sends all can be by detected by each detection device.Inventor
Research finds, when breaking down on basic routing line, the fault traveling wave that trouble point sends can pass sequentially through the on branched line
Four detection devices and the 3rd detection device, then on branched line, same the 4th separate detection device and the 3rd detection device receive
The fault traveling wave polarity arrived is identical；When branched line breaks down, the fault traveling wave that fault point sends is respectively to the 3rd inspection
Surveying device and the 4th detection device transmission, on branched line, same the 3rd separate detection device and the 4th detection device receive
Fault traveling wave opposite polarity, thus, it is possible to judge T-type line any bar line failure.
After judging faulty line, the Mintrop wave wave head time utilizing four detection devices to be detected carries out fault location.
According to single line distributed fault distance-finding method, faulty line is carried out fault location to refer specifically to: if fault occurs at backbone
Lu Shang, then utilize on branched line two detection devices to carry out fault traveling wave and test the speed, utilize two detections on basic routing line
Device carries out trouble point range finding.Specific formula for calculation is as follows:
Wherein, v is fault traveling wave speed；LAxRepresent the trouble point distance away from the first detection device A；LBDRepresent the 4th inspection
Survey the distance between device B and the 3rd detection device D；LACRepresent the distance between the first detection device and second detection device；
tA, tB, tC, tDRepresent that the first detection device, the 4th detection device, second detection device and the 3rd detection device detect respectively
The time of fault traveling wave Mintrop wave wave head.
It should be noted that present embodiment is to detect by trouble point distance first to say as a example by the distance of device
Bright, it is also possible to be found range in trouble point by the distance calculating trouble point distance second detection device.
When fault occurs on branched line, utilize the 4th detection device and the event of two detection devices on basic routing line
The Mintrop wave time difference of barrier row ripple calculates row wave speed, utilizes the Mintrop wave time difference of two on branched line detection devices to carry out trouble point
Range finding.Specific formula for calculation is as follows:
Or
Wherein, LBxRepresent the distance of trouble point distance the 4th detection device；LBCRepresent the 4th detection device and the second detection
Distance between device；LABRepresent the distance between the first detection device and the 4th detection device；LBDRepresent the 4th detection device
Distance between B and the 3rd detection device D；tA, tB, tC, tDRepresent the first detection device, the 4th detection device, the second inspection respectively
Survey device and the 3rd detection device detect the time of fault traveling wave Mintrop wave wave head.
It should be noted that in the present embodiment, in reality, trouble point is positioned, calculate the 4th detection device and
During the distance of each detection device on basic routing line, the position of the 4th detection device can be regarded as basic routing line and branch line
The joint on road, calculates to facilitate.
Use this system, only need to be according to two detections being arranged on branched line fault traveling waves detected by device
Mintrop wave polarity i.e. can determine that faulty line, and according to single line distributed fault distance-finding method, faulty line is carried out trouble point calmly
Position, only need to install four set detection devices in T-type line, decrease the quantity of detection device, reduce fault localization
This, be not required to utilize reflected wave information simultaneously, improve the reliability of range finding, there is not blind area.
Refer to a kind of T-type line fault distance-finding method flow process that Fig. 2, Fig. 2 are provided by one embodiment of the present invention
Figure.
Correspondingly, present invention also offers a kind of T-type line fault distance-finding method, including:
S11: be respectively provided with the first detection device and second at two end points of the basic routing line of T-shaped transmission line of electricity in advance
Detection device, is arranged on the branched line of T-shaped transmission line of electricity and away from the basic routing line end points with branched line joint
3rd detection device；On the branched line of T-shaped transmission line of electricity and at the end points of neighbouring basic routing line and branched line joint
4th detection device is set.
S12: determine fault wire according to the fault traveling wave Mintrop wave polarity that the 3rd detection device and the 4th detection device are gathered
Road.
Wherein, the fault traveling wave Mintrop wave polarity gathered according to the 3rd detection device and the 4th detection device determines fault wire
Road, including:
Judge that the polarity of fault traveling wave Mintrop wave that the 3rd detection device and the 4th detection device are gathered is the most identical；
The most then judge that basic routing line is as faulty line；
If it is not, then judge that branched line is as faulty line.
S13: faulty line is carried out fault location according to single line distributed fault distance-finding method.
When basic routing line is faulty line, according to single line distributed fault distance-finding method, faulty line is carried out fault and determine
Position, including:
The speed v of calculating fault traveling wave:
Calculate trouble point distance L away from the first detection deviceAx:
Wherein, LBDIt is the distance of the 3rd detection device to the 4th detection device, LACIt is that the first detection device is to the second detection
The distance of device；tA, tB, tC, tDRepresent the first detection device, the 4th detection device, second detection device and the 3rd detection respectively
Device detects the time of fault traveling wave Mintrop wave wave head.
When branched line is faulty line, according to single line distributed fault distance-finding method, faulty line is carried out fault and determine
Position, including:
The speed v of calculating fault traveling wave:Or
Calculate trouble point distance L away from the 4th detection deviceBx:
Wherein, LBCIt is the 4th detection device to the distance of second detection device, LABIt is that the first detection device is to the 4th detection
The distance of device, LBDIt is the distance of the 3rd detection device to the 4th detection device, tA, tB, tC, tDRepresent the first detection dress respectively
Put, the 4th detection device, second detection device and the 3rd detect device and the time of fault traveling wave Mintrop wave wave head detected.
On the basis of above-mentioned embodiment, one embodiment of the present invention combines PSCAD simulation software and provides a kind of T
The instantiation of molded line road fault location.In the present embodiment, basic routing line total length is 110km, and branch point is positioned at trunk
In circuit, distance first detects at device 60km, branch point i.e. basic routing line and the intersection of branched line, branched line length
For 40km, row velocity of wave propagation is 300m/us.Fault is A phase earth fault, and trouble point distance branch point on branched line
At 10km.
According to the T-type line fault distance-finding method in above-mentioned embodiment, when fault occurs, trigger each detection device and adopt
Collection fault traveling wave waveform.In the present embodiment, use haar small echo carry out singular values standard form, with judge the 3rd detection device and
The polarity of the 4th detection fault traveling wave detected by device, two detection dresses that result is shown as on branched line A phase line
Put the fault traveling wave opposite polarity collected, then demonstrate trouble point on branched line.First detection device, the 4th detection dress
Put, wave head time that the 3rd detection device, second detection device detects is respectively 433us, 233us, 300us, 399us.So
Fault is positioned by the rear method utilized in above-mentioned embodiment, and can calculate row wave speed is 299.7m/us, range finding
Result is on the branched line at distance branch point 9.96km of the trouble point, it can be deduced that range error is only 40m, meets range finding
The requirement of precision.
In sum, T-type line fault localization system and method provided by the present invention, only need according to being arranged on branch line
The Mintrop wave polarity of the fault traveling wave detected by device of two detections on road i.e. can determine that faulty line, and is distributed according to single line
Formula fault distance-finding method carries out localization of fault to faulty line, only need to install four set detection devices, subtract in T-type line
Lack the quantity of detection device, reduced fault localization cost, be not required to utilize reflected wave information simultaneously, improve the reliable of range finding
Property, there is not blind area.
Above a kind of T-type line fault localization system and method provided by the present invention is described in detail.Herein
Applying specific case to be set forth principle and the embodiment of the present invention, the explanation of above example is only intended to help
Understand the present invention and core concept thereof.It should be pointed out that, for those skilled in the art, without departing from this
On the premise of bright principle, it is also possible to the present invention is carried out some improvement and modification, these improve and modification also falls into present invention power
In the protection domain that profit requires.
Claims (6)
1. a T-type line fault localization system, it is characterised in that including: be separately positioned on the basic routing line of T-shaped transmission line of electricity
Two end points at the first detection device and second detection device；Be arranged on the branched line of described T-shaped transmission line of electricity and
Away from the 3rd detection device at the described basic routing line end points with branched line joint；It is arranged on described T-shaped transmission line of electricity
Branched line on and neighbouring described basic routing line and the end points of described branched line joint at the 4th detection device；With institute
State the first detection device, second detection device, the 3rd detection device and the 4th detection device communication connection, for according to described the
The fault traveling wave Mintrop wave polarity that three detection devices and the 4th detection device are collected determines faulty line, and is distributed according to single line
Formula fault distance-finding method carries out the processing means of fault location to described faulty line.
System the most according to claim 1, it is characterised in that described processing means is master station main frame.
3. a T-type line fault distance-finding method, it is characterised in that including:
The first detection device and the second detection dress it is respectively provided with in advance at two end points of the basic routing line of T-shaped transmission line of electricity
Put, on the branched line of described T-shaped transmission line of electricity and away from arranging the at the end points of basic routing line and branched line joint
Three detection devices；On the branched line of described T-shaped transmission line of electricity and adjacent to basic routing line and the end points of branched line joint
Place arranges the 4th detection device；
Fault wire is determined according to the fault traveling wave Mintrop wave polarity that described 3rd detection device and described 4th detection device are gathered
Road；
According to single line distributed fault distance-finding method, described faulty line is carried out fault location.
Method the most according to claim 3, it is characterised in that according to described 3rd detection device and described 4th detection dress
Put gathered fault traveling wave Mintrop wave polarity and determine faulty line, including:
Judge that described 3rd detection device is the most identical with the polarity of the fault traveling wave Mintrop wave that described 4th detection device is gathered；
The most then judge that described basic routing line is as faulty line；
If it is not, then judge that described branched line is as faulty line.
Method the most according to claim 4, it is characterised in that when described basic routing line is faulty line, according to single line
Distributed fault distance-finding method carries out fault location to described faulty line, including:
The speed v of calculating fault traveling wave:
Calculate trouble point distance L away from described first detection deviceAx:
Wherein, LBDIt is the distance of the 3rd detection device to the 4th detection device, LACIt is that the first detection device is to second detection device
Distance；tA, tB, tC, tDRepresent the first detection device, the 4th detection device, second detection device and the 3rd detection device respectively
The time of fault traveling wave Mintrop wave wave head detected.
6. according to the method described in claim 4 or 5, it is characterised in that when described branched line is faulty line, described
According to single line distributed fault distance-finding method, described faulty line is carried out fault location, including:
The speed v of calculating fault traveling wave:Or
Calculate trouble point distance L away from described 4th detection deviceBx:
Wherein, LBCIt is the 4th detection device to the distance of second detection device, LABIt is that the first detection device is to the 4th detection device
Distance, LBDIt is the distance of the 3rd detection device to the 4th detection device, tA, tB, tC, tDRepresent respectively the first detection device, the
Four detection devices, second detection device and the 3rd detection device detect the time of fault traveling wave Mintrop wave wave head.
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| CN109406952A (en) * | 2018-12-24 | 2019-03-01 | 国网青海省电力公司海北供电公司 | The active travelling wave positioning method and system of distribution network failure based on multi-point sampling |
| CN109799424A (en) * | 2019-01-18 | 2019-05-24 | 西安工程大学 | T-type line fault distance-finding method based on longitudinal impedance |
| CN110095685A (en) * | 2019-04-10 | 2019-08-06 | 三峡大学 | Voltage crossover corrects fault distance-finding method along T-type line based on dynamic realtime parameter |
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