CN108169626A - A kind of T-shaped power transmission line fault locating method and system - Google Patents
A kind of T-shaped power transmission line fault locating method and system Download PDFInfo
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
The present invention provides a kind of T-shaped power transmission line fault locating method and system, wherein the method includes：The zero _exit of fault traveling wave is obtained respectively and Aerial mode component reaches first end, second end and the time at third end of T-shaped transmission line of electricity；Utilize the preset algorithm model unrelated with velocity of wave, the zero _exit for being based respectively on fault traveling wave reaches first end, the time at second end and third end determines that trouble point reaches the first end, second end and first distance at third end and is based respectively on the component of fault traveling wave and reaches first end, second end and the time at third end and determine that trouble point reaches the first end, second end and the second distance at third end；Each first distance and the difference of second distance are calculated respectively；Comparison result fault point based on the difference and predetermined threshold value.The present invention has the characteristics of fault location precision is high and simple and practical.
Description
Technical field
The present embodiments relate to power system transmission lines to protect field, more particularly to T-shaped transmission open acess
Method and system.
Background technology
Ultra-high-tension power transmission line long transmission distance, conveying electric energy are big, and the vital task of electrical energy transportation is served as in electric system.
The extensive use in grid of T-shaped transmission line of electricity once T-shaped transmission line of electricity breaks down, will cause electric grid large area
Power outage, consequence are extremely serious.Therefore failure can not only be reduced by fast and accurately carrying out T-shaped transmission open acess
The maintenance of circuit and service restoration time, moreover it is possible to reduce the economic loss caused by power outage, to the reliable of electric system and
Safe operation is of great significance.T-shaped transmission line of electricity due in structure there are certain particularity, if only merely with list
Hold measurement data, it will be difficult to complete the positioning of trouble point.At present, T-shaped transmission line of electricity is typically all to carry out event using three end datas
Barrier positioning, including two methods：Fault analytical method and traveling wave method.
In fault analytical method, paper《Shu Hongchun, peak, Chen Xueyun wait .T type transmission system Fault Location Algorithms to grind
Study carefully Proceedings of the CSEEs, 1998,18 (6)：416-420.》Based on distributed parameter model, it is respectively compared by three end electrical quantity
If the T node voltage values being calculated by the value that one end calculates and the difference at other both ends, thus can determine that this end place
Branch for fault branch, then fault branch is solved using the fault location scheme of Double-End Source circuit, obtain failure away from
From.Paper《Yang-Hong Lin,Chih-Wen Liu,Chi-Shan Yu.A New Fault Locator for Three-
Terminal Transmission Lines-Using Two-Terminal Synchronized Voltage and
Current Phasors[J].IEEE Transaction Power Delivery.2002,17(2):452-459.》Need elder generation
It is assumed that a certain branch is not present, it is double line terminal T-type line equivalent.With the Fault Locating Method of double line terminal, acquire
Then fault distance compares the real part of fault distance with the actual range of T nodes, if the real part of fault distance is than practical
Apart from small then on this collateral road, in offside branch if the real part of fault distance is bigger than actual range, the if equal
Three branches, but this method is unable to accurate judgement T near nodals or the fault branch when breaking down on Article 3 branch road.
In traveling wave method, existing method detects two initial wavefronts of failure by velocity of wave and arrives separately at circuit both ends
Time and velocity of wave acquire abort situation, then identify fault branch.But velocity of wave is different in different transmission line structures
, for same circuit, also it is not quite similar in the parameter of different moments circuit, so as to cause erroneous calculations fault distance, it is difficult to
Failure is carried out to be accurately positioned.
Invention content
An embodiment of the present invention provides it is a kind of it is simple and convenient, there is the T-shaped transmission of electricity with high accuracy of highly practical and fault location
Line fault localization method and system.
In order to solve the above-mentioned technical problem, an embodiment of the present invention provides following technical solutions：
A kind of T-shaped power transmission line fault locating method, including：
Obtain the zero _exit of fault traveling wave respectively and Aerial mode component reach the first end of T-shaped transmission line of electricity, second end and
The time at third end；
Using the preset algorithm model unrelated with velocity of wave, the zero _exit for being based respectively on fault traveling wave reaches first end, the
The time at two ends and third end determines that trouble point reaches the first end, second end and first distance at third end and difference
Based on fault traveling wave component reach first end, the time at second end and third end determines that trouble point reaches the first end, the
Two ends and the second distance at third end；
Each first distance and the difference of second distance are calculated respectively；
Comparison result fault point based on the difference and predetermined threshold value.
Wherein, the expression formula of the preset algorithm model unrelated with velocity of wave includes：
Wherein, dABFor distance of the trouble point away from A ends is calculated using the fault traveling wave arrival circuit side a and b time,
dACFor distance of the trouble point away from A ends, d is calculated using fault traveling wave arrival circuit A ends and C-terminal timeBATo utilize failed row
Wave reaches circuit B ends and distance of the trouble point away from B ends, d is calculated in the A ends timeBCFor using fault traveling wave reach circuit B ends and
Distance of the trouble point away from B ends, d is calculated in the C-terminal timeCATo be calculated using fault traveling wave arrival circuit C-terminal and A ends time
Distance of the trouble point away from C-terminal, dCBFor using fault traveling wave reach circuit C-terminal and B ends time be calculated trouble point away from C-terminal away from
From tA0The time at circuit A ends, t are reached for fault traveling wave zero _exitA1For fault traveling wave Aerial mode component reach circuit A ends when
Between, tB0The time at circuit B ends, t are reached for fault traveling wave zero _exitB1For fault traveling wave Aerial mode component reach circuit B ends when
Between, tC0Reach C-terminal time, t for fault traveling wave zero _exitC1Reach C-terminal time, l for fault traveling wave Aerial mode componentATBFor circuit
The length of AB, lATCFor the length of circuit AC, lBTCLength for circuit BC.
Wherein, the comparison result fault point based on the difference and predetermined threshold value includes：
The branch where trouble point is determined based on the difference and predetermined threshold value；
The time at the both ends of branch is set to trouble point where reaching trouble point based on trouble point.
Wherein, it is described trouble point is determined based on the difference and predetermined threshold value where branch include：
When the difference of the first end, second end and third end is both less than the predetermined threshold value, determine that failure is happened at T
At type transmission line of electricity node；
When only having the difference of one end to be more than the predetermined threshold value in the difference of the first end, second end and third end,
Compare remaining both ends to the distance of trouble point and local terminal leg length, and determine that failure is happened at the branch less than local terminal leg length
On the road；
When the small predetermined threshold value of the difference for there was only one end in the difference of the first end, second end and third end, really
Determine failure and be happened at the branch road less than the predetermined threshold value.
Wherein, the range of the predetermined threshold value includes [100m, 400m].
The embodiment of the present invention additionally provides a kind of T-shaped transmission open acess system, and application is such as above-described embodiment institute
The T-shaped power transmission line fault locating method stated, and including：
Fault traveling wave harvester is installed in the first end, second end and third end of the T-shaped transmission line of electricity,
And reach first end, second end and the third end of T-shaped transmission line of electricity for obtaining the zero _exit of fault traveling wave and Aerial mode component
Time；
Data processor is configured to, using the preset algorithm model unrelated with velocity of wave, be based respectively on the zero of fault traveling wave
Mold component arrival first end, second end and the time at third end determine that trouble point reaches the first end, second end and third end
The first distance and be based respectively on fault traveling wave component reach first end, the time at second end and third end determines failure
Point reaches the first end, second end and the second distance at third end；Each first distance and second distance are calculated respectively
Difference；Comparison result fault point based on the difference and predetermined threshold value.
7th, system according to claim 6, wherein, the expression formula packet of the preset algorithm model unrelated with velocity of wave
It includes：
Wherein, dABFor distance of the trouble point away from A ends is calculated using the fault traveling wave arrival circuit side a and b time,
dACFor distance of the trouble point away from A ends, d is calculated using fault traveling wave arrival circuit A ends and C-terminal timeBATo utilize failed row
Wave reaches circuit B ends and distance of the trouble point away from B ends, d is calculated in the A ends timeBCFor using fault traveling wave reach circuit B ends and
Distance of the trouble point away from B ends, d is calculated in the C-terminal timeCATo be calculated using fault traveling wave arrival circuit C-terminal and A ends time
Distance of the trouble point away from C-terminal, dCBFor using fault traveling wave reach circuit C-terminal and B ends time be calculated trouble point away from C-terminal away from
From tA0The time at circuit A ends, t are reached for fault traveling wave zero _exitA1For fault traveling wave Aerial mode component reach circuit A ends when
Between, tB0The time at circuit B ends, t are reached for fault traveling wave zero _exitB1For fault traveling wave Aerial mode component reach circuit B ends when
Between, tC0Reach C-terminal time, t for fault traveling wave zero _exitC1Reach C-terminal time, l for fault traveling wave Aerial mode componentATBFor circuit
The length of AB, lATCFor the length of circuit AC, lBTCLength for circuit BC.
Wherein, the data processor is additionally configured to determine the branch where trouble point based on the difference and predetermined threshold value
Time at both ends of road and branch where reaching trouble point based on trouble point is set to trouble point.
Wherein, the data processor is additionally configured to be both less than institute when the difference of the first end, second end and third end
When stating predetermined threshold value, determine that failure is happened at T-shaped transmission line of electricity node；
When only having the difference of one end to be more than the predetermined threshold value in the difference of the first end, second end and third end,
Compare remaining both ends to the distance of trouble point and local terminal leg length, and determine that failure is happened at the branch less than local terminal leg length
On the road；
When the small predetermined threshold value of the difference for there was only one end in the difference of the first end, second end and third end, really
Determine failure and be happened at the branch road less than the predetermined threshold value.
Wherein, the range of the predetermined threshold value includes [100m, 400m].
It can know that the embodiment of the present invention has following advantageous effect based on disclosed above：
The embodiment of the present invention using T-shaped transmission line malfunction traveling wave zero _exit and Aerial mode component reach each end time and
Line length carries out fault location, eliminates influence of the velocity of wave to fault location, and positioning accuracy is high, it is easy to accomplish；
In addition, the method for discrimination of the embodiment of the present invention is simple and reliable, and easy to operate, highly practical, not by fault ground
Resistance, fault type and method of operation limitation, are realized easy.
Description of the drawings
Fig. 1 is the principle flow chart of the T-shaped power transmission line fault locating method in the embodiment of the present invention；
Fig. 2 is the T-shaped transmission line malfunction traveling wave figure in the embodiment of the present invention；
Fig. 3 is that trouble point is when circuit CT branches break down away from C-terminal 40km in the embodiment of the present invention, the event of A ends measurement
Hinder traveling wave Aerial mode component figure；
Fig. 4 is that trouble point is when circuit CT branches break down away from C-terminal 40km in the embodiment of the present invention, the event of B ends measurement
Hinder traveling wave Aerial mode component figure；
Fig. 5 is that trouble point is when circuit CT branches break down away from C-terminal 40km in the embodiment of the present invention, the event of C-terminal measurement
Hinder traveling wave Aerial mode component figure；
Fig. 6 is that trouble point is when circuit CT branches break down away from C-terminal 40km in the embodiment of the present invention, the event of A ends measurement
Hinder traveling wave zero _exit figure；
Fig. 7 is that trouble point is when circuit CT branches break down away from C-terminal 40km in the embodiment of the present invention, the event of B ends measurement
Hinder traveling wave zero _exit figure；
Fig. 8 is that trouble point is when circuit CT branches break down away from C-terminal 40km in the embodiment of the present invention, the event of C-terminal measurement
Hinder traveling wave zero _exit figure.
Specific embodiment
In the following, specific embodiments of the present invention are described in detail with reference to attached drawing, but not as limiting to the invention.
It should be understood that various modifications can be made to disclosed embodiments.Therefore, description above should not regard
To limit, and only as the example of embodiment.Those skilled in the art will expect within the scope and spirit of this
Other modifications.
The attached drawing being included in the description and forms part of the description shows embodiment of the disclosure, and with it is upper
What face provided is used to explain the disclosure together to the substantially description of the disclosure and the detailed description given below to embodiment
Principle.
It is of the invention by the description of the preferred form of the embodiment with reference to the accompanying drawings to being given as non-limiting examples
These and other characteristic will become apparent.
It is also understood that although invention has been described with reference to some specific examples, people in the art
Member realize with can determine the present invention many other equivalents, they have feature as claimed in claim and therefore all
In the protection domain limited whereby.
When read in conjunction with the accompanying drawings, in view of described further below, above and other aspect, the feature and advantage of the disclosure will become
It is more readily apparent.
The specific embodiment of the disclosure is described hereinafter with reference to attached drawing；It will be appreciated, however, that the disclosed embodiments are only
Various ways implementation can be used in the example of the disclosure.It is known and/or repeat function and structure be not described in detail to avoid
Unnecessary or extra details so that the disclosure is smudgy.Therefore, specific structural and functionality disclosed herein is thin
Section is not intended to restrictions, but as just the basis of claim and representative basis be used to instructing those skilled in the art with
Substantially any appropriate detailed construction diversely uses the disclosure.
This specification can be used phrase " in one embodiment ", " in another embodiment ", " in another embodiment
In " or " in other embodiments ", it can be referred to according to one or more of identical or different embodiment of the disclosure.
In the following, the embodiment of the present invention is described in detail with reference to attached drawing, an embodiment of the present invention provides a kind of T-shaped transmission lines of electricity
Fault Locating Method and system, wherein using T-shaped transmission line malfunction traveling wave zero _exit and Aerial mode component reach each end when
Between and line length carry out fault location, eliminate influence of the velocity of wave to fault location, positioning accuracy is high, it is easy to accomplish；In addition, this
The method of discrimination of inventive embodiments is simple and reliable, and easy to operate, highly practical, not by fault ground resistance, fault type with
And method of operation limitation, it realizes easy.
As shown in Figure 1, the principle flow chart for the T-shaped power transmission line fault locating method in the embodiment of the present invention, wherein
This hair life T-shaped power transmission line fault locating method of embodiment can include：
Obtain the zero _exit of fault traveling wave respectively and Aerial mode component reach the first end of T-shaped transmission line of electricity, second end and
The time at third end；
Using the preset algorithm model unrelated with velocity of wave, the zero _exit for being based respectively on fault traveling wave reaches first end, the
The time at two ends and third end determines that trouble point reaches the first end, second end and first distance at third end and difference
Based on fault traveling wave component reach first end, the time at second end and third end determines that trouble point reaches the first end, the
Two ends and the second distance at third end；
Each first distance and the difference of second distance are calculated respectively；
Comparison result fault point based on the difference and predetermined threshold value.
Wherein, the comparison result fault point based on the difference and predetermined threshold value can include：
The branch where trouble point is determined based on the difference and predetermined threshold value；
The time at the both ends of branch is set to trouble point where reaching trouble point based on trouble point.
In addition wherein, it is described trouble point is determined based on the difference and predetermined threshold value where branch include：
When the difference of the first end, second end and third end is both less than the predetermined threshold value, determine that failure is happened at T
At type transmission line of electricity node；
When only having the difference of one end to be more than the predetermined threshold value in the difference of the first end, second end and third end,
Compare remaining both ends to the distance of trouble point and local terminal leg length, and determine that failure is happened at the branch less than local terminal leg length
On the road；
When the small predetermined threshold value of the difference for there was only one end in the difference of the first end, second end and third end, really
Determine failure and be happened at the branch road less than the predetermined threshold value.
Also, the range of wherein described predetermined threshold value includes [100m, 400m].
In the embodiment of the present invention, at T-shaped three end of transmission line of electricity fault traveling wave high speed acquisition device can be installed respectively, with reality
When on-line measurement fault traveling wave zero _exit and Aerial mode component reach time at each end；And it is utilized respectively the both ends time and calculates
To trouble point to two results of each end-point distances of T-shaped transmission line of electricity；Compare the size of two result differences and predetermined threshold value, sentence
Branch where determining trouble point, and determine position of failure point.The localization method of the present invention need not measure velocity of wave, only need to measure zero curve mould
Component reaches the time at each end, and method of discrimination is simple and reliable, has the characteristics that easy to operate, highly practical, fast accurate positioning.
Specifically, the embodiment of the present invention is by taking the T-shaped transmission open acess of 220kV as an example, the length of circuit AT, BT, CT
Degree can be respectively 70km, 80km and 100km, and however, the present invention is not limited theretos can also be the configuration of other distances.It simultaneously can
To install fault traveling wave high speed acquisition device at three end A, B, C of T-shaped transmission line of electricity respectively, when breaking down on transmission line of electricity
When, trouble point generates travelling wave signal, and entire power transmission network is transmitted to along transmission line of electricity, the event mounted on T-shaped tri- end of transmission line of electricity A, B, C
Hinder traveling wave high speed acquisition device and can detect travelling wave signal, and record arriving for primary fault traveling wave zero _exit and Aerial mode component
Up to the time.
When failure respectively holds the arrival of primary fault traveling wave zero _exit and Aerial mode component after occurring using T-shaped transmission line of electricity
Between, a kind of T-shaped transmission line malfunction travelling wave positioning method flow chart unrelated with velocity of wave carries out fault location meter according to Fig. 1
It calculates, specific calculating process is as follows：
Referring to Fig. 2, t0Moment breaks down at T-shaped transmission line of electricity CT branches, according to fault traveling wave both-end ranging formula
The distance that trouble point can be obtained to C-terminal is：
The time of the same end and the relationship of line length are arrived separately at using fault traveling wave zero _exit and Aerial mode component, it can
：
lCTA=v1(tC1-t0+tA1-t0), lCTA=v0(tC0-t0+tA0-t0)
lCTB=v1(tC1-t0+tB1-t0), lCTB=v0(tC0-t0+tB0-t0), v0(tC0-t0)=v1(tC1-t0)
Eliminate v1、v0、t0：
Trouble point can similarly be obtained to the distance at A ends：
Trouble point can similarly be obtained to the distance at B ends：
Wherein, dCAFor distance of the trouble point away from C-terminal is calculated using fault traveling wave arrival circuit C-terminal and A ends time,
dCBFor distance of the trouble point away from C-terminal, d is calculated using fault traveling wave arrival circuit C-terminal and B ends timeABTo utilize failed row
Distance of the trouble point away from A ends, d is calculated in the wave arrival circuit side a and b timeACFor using fault traveling wave reach circuit A ends and
Distance of the trouble point away from A ends, d is calculated in the C-terminal timeBATo be calculated using fault traveling wave arrival circuit B ends and A ends time
Distance of the trouble point away from B ends, dBCFor using fault traveling wave reach circuit B ends and C-terminal time be calculated trouble point away from B ends away from
From tC0Reach C-terminal time, t for fault traveling wave zero _exitC1Reach C-terminal time, t for fault traveling wave Aerial mode componentA0For failure
Traveling wave zero _exit reaches the time at circuit A ends, tA1The time at circuit A ends, t are reached for fault traveling wave Aerial mode componentB0For failure
Traveling wave zero _exit reaches the time at circuit B ends, tB1The time at circuit B ends, v are reached for fault traveling wave Aerial mode component1For failure
Traveling wave Aerial mode component velocity of wave, v0For fault traveling wave zero _exit velocity of wave, lATBFor the length of circuit AB, lATCLength for circuit AC
Degree, lBTCLength for circuit BC.
It is assumed that zero moment breaks down at T-shaped transmission line of electricity T nodes.Referring to table 1, fault traveling wave zero _exit and line mould point
The time that amount arrives separately at tri- end of A, B, C is tA0=247.9 μ s, tB0=282.6 μ s, tC0=351.4 μ s, tA1=238.9 μ s,
tB1=272.3 μ s, tC1=338.5 μ s can obtain trouble point to T-shaped transmission line of electricity according to the both-end ranging formula unrelated with velocity of wave
Two results of each end-point distances：
Zero curve mold component reaches the time at each end during 1 failure of table
2 fault location result of table
The difference of each two measurement results in end can be calculated respectively based on above-mentioned distance, and compared with predetermined threshold value：
dA=| dAB-dAC|=| 69.948-69.863 |=0.085km<400m
dB=| dBC-dBA|=| 79.914-80.052 |=0.138km<400m
dC=| dCA-dCB|=| 100.137-100.086 |=0.051km<400m
Compare the size of three differences and predetermined threshold value, wherein three differences are both less than predetermined threshold value, as shown in table 2, therefore
Barrier is happened at the T nodes of T-shaped transmission line of electricity, and fault branch judgement is accurate, and fault location is accurate.
In addition, it is assumed that T-shaped transmission line of electricity CT branches break down away from zero moment at C-terminal 99.9km.Referring to table 1, failed row
The time that wave zero _exit and Aerial mode component arrive separately at tri- end of A, B, C is tA0=249.4 μ s, tB0=284.5 μ s, tC0=
351.1μs、tA1=337.4 μ s, tB1=273.5 μ s, tC1=239.7 μ s can be obtained according to the both-end ranging formula unrelated with velocity of wave
Trouble point is to two results of each end-point distances of T-shaped transmission line of electricity：
The difference of each two measurement results in end is calculated respectively, and compared with predetermined threshold value：
dA=| dAB-dAC|=| 70.290-70.470 |=0.180km<400m
dB=| dBC-dBA|=| 80.162-79.710 |=0.452km>400m
dC=| dCA-dCB|=| 99.530-99.838 |=0.308km<400m
Compare the size of three differences and predetermined threshold value, only there are one predetermined threshold value is more than in three differences, calculate remaining
The distance of ends A, C to trouble point.Trouble point is taken to the distance d at A endsAB、dACThe average value of two groups of results obtains trouble point to A
The distance at end isThe length of circuit AT branches be 70km, trouble point to A
The distance at end is more than the length of circuit AT branches, fixes a breakdown a little in circuit AT branches.Trouble point is taken to the distance d of C-terminalCA、dCB
The average value of two groups of results, the distance for obtaining trouble point to C-terminal are
The length of circuit CT branches is 100km, and the distance of trouble point to C-terminal is less than the length of circuit CT branches, determines that trouble point is online
Road CT branches, fault branch judgement are accurate.Take the computational length of T-shaped transmission line of electricity AC and the physical length of circuit AC after failure poor
It is worth Δ d=dA+dC-lATC=70.380+99.684-170=0.064km, the distance for obtaining trouble point to C-terminal areThe distance of actual fault point to C-terminal is 99.9km, and range error is
152m meets pinpoint standard.
In addition, it is assumed that T-shaped transmission line of electricity CT branches break down away from zero moment at C-terminal 40km.Wherein reference Fig. 3-Fig. 8,
Wherein Fig. 3 is that trouble point is when circuit CT branches break down away from C-terminal 40km in the embodiment of the present invention, the failed row of A ends measurement
Swash mold component figure；Fig. 4 is that when circuit CT branches break down away from C-terminal 40km, B ends measure for trouble point in the embodiment of the present invention
Fault traveling wave Aerial mode component figure；Fig. 5 is that trouble point is broken down in circuit CT branches away from C-terminal 40km in the embodiment of the present invention
When, the fault traveling wave Aerial mode component figure of C-terminal measurement；Fig. 6 is for trouble point in the embodiment of the present invention in circuit CT branches away from C-terminal 40km
When breaking down, the fault traveling wave zero _exit figure of A ends measurement；Fig. 7 is trouble point in the embodiment of the present invention in circuit CT branches
When breaking down away from C-terminal 40km, the fault traveling wave zero _exit figure of B ends measurement；Fig. 8 is that trouble point is online in the embodiment of the present invention
When road CT branches break down away from C-terminal 40km, the fault traveling wave zero _exit figure of C-terminal measurement.
The time that referring also to table 1, fault traveling wave zero _exit and Aerial mode component arrive separately at tri- end of A, B, C is tA0=
462.1μs、tB0=497 μ s, tC0=143.1 μ s, tA1=440.9 μ s, tB1=474.2 μ s, tC1=136.6 μ s, according to wave
The unrelated both-end ranging formula of speed can obtain trouble point to two results of each end-point distances of T-shaped transmission line of electricity：
The difference of each two measurement results in end is calculated respectively, and compared with predetermined threshold value：
dA=| dAB-dAC|=| 72.273-130.108 |=57.835km>400m
dB=| dBC-dBA|=| 140.068-77.727 |=62.341km>400m
dC=| dCA-dCB|=| 39.892-39.932 |=0.04km<400m
Compare the size of three differences and predetermined threshold value it is found that only there are one being less than predetermined threshold value in three differences, so
Failure is happened at the CT branches less than predetermined threshold value, and fault branch judgement is accurate.Trouble point is taken to the distance d of C-terminalCA、dCBTwo groups
As a result average value, the distance for obtaining trouble point to C-terminal areActual fault point arrives C-terminal
Distance is 40km, and range error 88m meets pinpoint standard.
In conclusion the embodiment of the present invention is reached respectively using T-shaped transmission line malfunction traveling wave zero _exit and Aerial mode component
The time at end and line length carry out fault location, eliminate influence of the velocity of wave to fault location, and positioning accuracy is high, it is easy to accomplish；
In addition, the method for discrimination of the embodiment of the present invention is simple and reliable, and easy to operate, highly practical, not by fault ground resistance, failure
Type and method of operation limitation, are realized easy.
In addition, the embodiment of the present invention additionally provides a kind of T-shaped transmission open acess system, application such as above-mentioned implementation
T-shaped power transmission line fault locating method described in example, and the T-shaped transmission open acess system in the embodiment of the present invention can
To include：Three fault traveling wave harvesters and the data processor with the communication connection of each fault traveling wave harvester.
Wherein, fault traveling wave harvester 1 is installed in the first end, second end and third end of the T-shaped transmission line of electricity
On, and reach first end, second end and the third of T-shaped transmission line of electricity for obtaining the zero _exit of fault traveling wave and Aerial mode component
The time at end.
Data processor 2 can utilize the preset algorithm model unrelated with velocity of wave, be based respectively on from fault traveling wave and acquire dress
The zero _exit arrival first end, second end and the time at third end for putting the fault traveling wave of 1 reception are determined described in the arrival of trouble point
First end, second end and first distance at third end and be based respectively on fault traveling wave component reach first end, second end and
The time at third end determines that trouble point reaches the first end, second end and the second distance at third end；It calculates respectively each described
The difference of first distance and second distance；Comparison result fault point based on the difference and predetermined threshold value.
Wherein, the expression formula of the preset algorithm model unrelated with velocity of wave includes：
Wherein, dABFor distance of the trouble point away from A ends is calculated using the fault traveling wave arrival circuit side a and b time,
dACFor distance of the trouble point away from A ends, d is calculated using fault traveling wave arrival circuit A ends and C-terminal timeBATo utilize failed row
Wave reaches circuit B ends and distance of the trouble point away from B ends, d is calculated in the A ends timeBCFor using fault traveling wave reach circuit B ends and
Distance of the trouble point away from B ends, d is calculated in the C-terminal timeCATo be calculated using fault traveling wave arrival circuit C-terminal and A ends time
Distance of the trouble point away from C-terminal, dCBFor using fault traveling wave reach circuit C-terminal and B ends time be calculated trouble point away from C-terminal away from
From tA0The time at circuit A ends, t are reached for fault traveling wave zero _exitA1For fault traveling wave Aerial mode component reach circuit A ends when
Between, tB0The time at circuit B ends, t are reached for fault traveling wave zero _exitB1For fault traveling wave Aerial mode component reach circuit B ends when
Between, tC0Reach C-terminal time, t for fault traveling wave zero _exitC1Reach C-terminal time, l for fault traveling wave Aerial mode componentATBFor circuit
The length of AB, lATCFor the length of circuit AC, lBTCLength for circuit BC.
In addition, the data processor 2 is additionally configured to determine the branch where trouble point based on the difference and predetermined threshold value
Time at both ends of road and branch where reaching trouble point based on trouble point is set to trouble point.
Wherein, the data processor 2 is additionally configured to be both less than institute when the difference of the first end, second end and third end
When stating predetermined threshold value, determine that failure is happened at T-shaped transmission line of electricity node；
When only having the difference of one end to be more than the predetermined threshold value in the difference of the first end, second end and third end,
Compare remaining both ends to the distance of trouble point and local terminal leg length, and determine that failure is happened at the branch less than local terminal leg length
On the road；
When the small predetermined threshold value of the difference for there was only one end in the difference of the first end, second end and third end, really
Determine failure and be happened at the branch road less than the predetermined threshold value.
Wherein, the range of the predetermined threshold value includes [100m, 400m].
The T-shaped transmission open acess system of the embodiment of the present invention uses configuration corresponding with the above method, herein not
Again system is repeated to illustrate.
In conclusion the embodiment of the present invention is reached respectively using T-shaped transmission line malfunction traveling wave zero _exit and Aerial mode component
The time at end and line length carry out fault location, eliminate influence of the velocity of wave to fault location, and positioning accuracy is high, it is easy to accomplish；
In addition, the method for discrimination of the embodiment of the present invention is simple and reliable, and easy to operate, highly practical, not by fault ground resistance, failure
Type and method of operation limitation, are realized easy.
It is apparent to those skilled in the art that for convenience and simplicity of description, the data of foregoing description
The electronic equipment that processing method is applied to can refer to the corresponding description in before-mentioned products embodiment, and details are not described herein.
Above example is only exemplary embodiment of the present invention, is not used in the limitation present invention, protection scope of the present invention
It is defined by the claims.Those skilled in the art can make the present invention respectively within the spirit and scope of the present invention
Kind modification or equivalent replacement, this modification or equivalent replacement also should be regarded as being within the scope of the present invention.
Claims (10)
1. a kind of T-shaped power transmission line fault locating method, including：
The zero _exit of fault traveling wave is obtained respectively and Aerial mode component reaches first end, second end and the third of T-shaped transmission line of electricity
The time at end；
Using the preset algorithm model unrelated with velocity of wave, the zero _exit for being based respectively on fault traveling wave reaches first end, second end
The trouble point arrival first end, second end and first distance at third end are determined with the time at third end and are based respectively on
Component arrival first end, second end and the time at third end of fault traveling wave determine that trouble point reaches the first end, second end
With the second distance at third end；
Each first distance and the difference of second distance are calculated respectively；
Comparison result fault point based on the difference and predetermined threshold value.
2. according to the method described in claim 1, wherein, the expression formula of the preset algorithm model unrelated with velocity of wave includes：
Wherein, dABFor distance of the trouble point away from A ends, d is calculated using the fault traveling wave arrival circuit side a and b timeACFor profit
Circuit A ends are reached with fault traveling wave and distance of the trouble point away from A ends, d is calculated in the C-terminal timeBATo be reached using fault traveling wave
Distance of the trouble point away from B ends, d is calculated in circuit B ends and A ends timeBCDuring to reach circuit B ends and C-terminal using fault traveling wave
Between distance of the trouble point away from B ends, d is calculatedCAFor failure is calculated using fault traveling wave arrival circuit C-terminal and A ends time
Distance of the point away from C-terminal, dCBFor distance of the trouble point away from C-terminal is calculated using fault traveling wave arrival circuit C-terminal and B ends time,
tA0The time at circuit A ends, t are reached for fault traveling wave zero _exitA1The time at circuit A ends is reached for fault traveling wave Aerial mode component,
tB0The time at circuit B ends, t are reached for fault traveling wave zero _exitB1The time at circuit B ends is reached for fault traveling wave Aerial mode component,
tC0Reach C-terminal time, t for fault traveling wave zero _exitC1Reach C-terminal time, l for fault traveling wave Aerial mode componentATBFor circuit AB
Length, lATCFor the length of circuit AC, lBTCLength for circuit BC.
3. according to the method described in claim 1, wherein, it is described positioned based on the comparison result of the difference and predetermined threshold value therefore
Barrier point includes：
The branch where trouble point is determined based on the difference and predetermined threshold value；
The time at the both ends of branch is set to trouble point where reaching trouble point based on trouble point.
4. according to the method described in claim 3, wherein, it is described trouble point is determined based on the difference and predetermined threshold value where
Branch includes：
When the difference of the first end, second end and third end is both less than the predetermined threshold value, it is T-shaped defeated to determine that failure is happened at
At electric wire circuit node；
When only having the difference of one end to be more than the predetermined threshold value in the difference of the first end, second end and third end, compare
Remaining both ends determine that failure is happened at the branch less than local terminal leg length to the distance of trouble point and local terminal leg length
On；
When the small predetermined threshold value of the difference for there was only one end in the difference of the first end, second end and third end, event is determined
Barrier is happened at the branch road less than the predetermined threshold value.
5. according to the method described in claim 1, wherein, the range of the predetermined threshold value includes [100m, 400m].
6. a kind of T-shaped transmission open acess system, T-shaped transmission of electricity of the application as described in any one in claim 1-5
Line fault localization method, and including：
Fault traveling wave harvester is installed in the first end, second end and third end of the T-shaped transmission line of electricity, is used in combination
In the zero _exit and Aerial mode component for obtaining fault traveling wave reach the first end of T-shaped transmission line of electricity, second end and third end when
Between；
Data processor is configured to, using the preset algorithm model unrelated with velocity of wave, be based respectively on zero mould point of fault traveling wave
Amount reaches first end, the time at second end and third end determines that trouble point reaches the of the first end, second end and third end
One distance and be based respectively on fault traveling wave component reach first end, the time at second end and third end determines that trouble point is arrived
Up to the second distance of the first end, second end and third end；Each first distance and the difference of second distance are calculated respectively；
Comparison result fault point based on the difference and predetermined threshold value.
7. system according to claim 6, wherein, the expression formula of the preset algorithm model unrelated with velocity of wave includes：
Wherein, dABFor distance of the trouble point away from A ends, d is calculated using the fault traveling wave arrival circuit side a and b timeACFor profit
Circuit A ends are reached with fault traveling wave and distance of the trouble point away from A ends, d is calculated in the C-terminal timeBATo be reached using fault traveling wave
Distance of the trouble point away from B ends, d is calculated in circuit B ends and A ends timeBCDuring to reach circuit B ends and C-terminal using fault traveling wave
Between distance of the trouble point away from B ends, d is calculatedCAFor failure is calculated using fault traveling wave arrival circuit C-terminal and A ends time
Distance of the point away from C-terminal, dCBFor distance of the trouble point away from C-terminal is calculated using fault traveling wave arrival circuit C-terminal and B ends time,
tA0The time at circuit A ends, t are reached for fault traveling wave zero _exitA1The time at circuit A ends is reached for fault traveling wave Aerial mode component,
tB0The time at circuit B ends, t are reached for fault traveling wave zero _exitB1The time at circuit B ends is reached for fault traveling wave Aerial mode component,
tC0Reach C-terminal time, t for fault traveling wave zero _exitC1Reach C-terminal time, l for fault traveling wave Aerial mode componentATBFor circuit AB
Length, lATCFor the length of circuit AC, lBTCLength for circuit BC.
8. system according to claim 6, wherein, the data processor is additionally configured to based on the difference and default threshold
Branch where the determining trouble point of value and the time based on the both ends of branch where the arrival trouble point of trouble point are set to failure
Point.
9. system according to claim 8, wherein, the data processor is additionally configured to when the first end, second end
When being both less than the predetermined threshold value with the difference at third end, determine that failure is happened at T-shaped transmission line of electricity node；
When only having the difference of one end to be more than the predetermined threshold value in the difference of the first end, second end and third end, compare
Remaining both ends determine that failure is happened at the branch less than local terminal leg length to the distance of trouble point and local terminal leg length
On；
When the small predetermined threshold value of the difference for there was only one end in the difference of the first end, second end and third end, event is determined
Barrier is happened at the branch road less than the predetermined threshold value.
10. system according to claim 6, wherein, the range of the predetermined threshold value includes [100m, 400m].
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110726904A (en) * | 2019-09-27 | 2020-01-24 | 广西电网有限责任公司电力科学研究院 | Method for accurately positioning fault point based on distributed T-order power transmission circuit |
| CN110850235A (en) * | 2019-11-27 | 2020-02-28 | 广东电网有限责任公司 | Multi-terminal positioning algorithm and positioning system based on cable topology and fault transient traveling wave |
| CN112269096A (en) * | 2020-09-22 | 2021-01-26 | 华中科技大学 | K coefficient-based power distribution network traveling wave fault positioning method, device and system |
| CN114859179A (en) * | 2022-05-27 | 2022-08-05 | 湖南大学 | Hybrid line power distribution network traveling wave fault positioning method for eliminating wave velocity influence |
| CN116754900A (en) * | 2023-08-21 | 2023-09-15 | 国网山东省电力公司日照供电公司 | Fault distance measurement method, system, medium and equipment for distribution network with multiple undetectable branches |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103941151A (en) * | 2014-04-03 | 2014-07-23 | 昆明理工大学 | Radiation net fault location method by means of zero mode and aerial mode time difference independent of double-end synchronization and with matching of magnitude of voltages and magnitude of currents |
| CN105699855A (en) * | 2016-04-06 | 2016-06-22 | 国网技术学院 | Single-ended traveling fault location calculation method and location method insusceptible to traveling wave speed |
| CN106291262A (en) * | 2016-10-26 | 2017-01-04 | 四川大学 | The detection and location method of Distribution Network Frame ceases to be busy singlephase earth fault |
| CN106291261A (en) * | 2016-10-26 | 2017-01-04 | 四川大学 | The localization method of series-parallel connection one-phase earthing failure in electric distribution network |
| US20170089971A1 (en) * | 2015-08-13 | 2017-03-30 | State Grid Corporation Of China | Fault Point Locating Method of Hybrid Lines Based on Analysis of Comprehensive Characteristics of Single-end Electric Quantity and Transient Travelling Waves |
-
2018
- 2018-01-16 CN CN201810040021.4A patent/CN108169626B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103941151A (en) * | 2014-04-03 | 2014-07-23 | 昆明理工大学 | Radiation net fault location method by means of zero mode and aerial mode time difference independent of double-end synchronization and with matching of magnitude of voltages and magnitude of currents |
| US20170089971A1 (en) * | 2015-08-13 | 2017-03-30 | State Grid Corporation Of China | Fault Point Locating Method of Hybrid Lines Based on Analysis of Comprehensive Characteristics of Single-end Electric Quantity and Transient Travelling Waves |
| CN105699855A (en) * | 2016-04-06 | 2016-06-22 | 国网技术学院 | Single-ended traveling fault location calculation method and location method insusceptible to traveling wave speed |
| CN106291262A (en) * | 2016-10-26 | 2017-01-04 | 四川大学 | The detection and location method of Distribution Network Frame ceases to be busy singlephase earth fault |
| CN106291261A (en) * | 2016-10-26 | 2017-01-04 | 四川大学 | The localization method of series-parallel connection one-phase earthing failure in electric distribution network |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110726904A (en) * | 2019-09-27 | 2020-01-24 | 广西电网有限责任公司电力科学研究院 | Method for accurately positioning fault point based on distributed T-order power transmission circuit |
| CN110850235A (en) * | 2019-11-27 | 2020-02-28 | 广东电网有限责任公司 | Multi-terminal positioning algorithm and positioning system based on cable topology and fault transient traveling wave |
| CN112269096A (en) * | 2020-09-22 | 2021-01-26 | 华中科技大学 | K coefficient-based power distribution network traveling wave fault positioning method, device and system |
| CN112269096B (en) * | 2020-09-22 | 2021-08-31 | 华中科技大学 | K coefficient-based power distribution network traveling wave fault positioning method, device and system |
| CN114859179A (en) * | 2022-05-27 | 2022-08-05 | 湖南大学 | Hybrid line power distribution network traveling wave fault positioning method for eliminating wave velocity influence |
| CN114859179B (en) * | 2022-05-27 | 2024-06-04 | 湖南大学 | Mixed line power distribution network traveling wave fault positioning method capable of eliminating wave velocity influence |
| CN116754900A (en) * | 2023-08-21 | 2023-09-15 | 国网山东省电力公司日照供电公司 | Fault distance measurement method, system, medium and equipment for distribution network with multiple undetectable branches |
| CN116754900B (en) * | 2023-08-21 | 2023-11-14 | 国网山东省电力公司日照供电公司 | Fault distance measurement method, system, medium and equipment for distribution network with multiple undetectable branches |
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