CN109901017A - A kind of 4 combination methods of non-contact distributed traveling wave fault location - Google Patents
A kind of 4 combination methods of non-contact distributed traveling wave fault location Download PDFInfo
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- CN109901017A CN109901017A CN201910199010.5A CN201910199010A CN109901017A CN 109901017 A CN109901017 A CN 109901017A CN 201910199010 A CN201910199010 A CN 201910199010A CN 109901017 A CN109901017 A CN 109901017A
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Abstract
The invention discloses a kind of 4 combination methods of non-contact distributed traveling wave fault location to be symmetrical arranged four test points Y1, Y2, Y3, Y4, and have L on the given route MN that overall length is LY1≤ 10km, LY4≤10km.When failure is between Y2 and Y3, the approximate location of fault point is calculated, to judge upstream or downstream that fault point is put in the line.According to the time difference between guilty culprit section and corresponding first three traveling wave of test point, position of failure point can be calculated.According to the time difference between guilty culprit section and corresponding first three traveling wave of test point, position of failure point is calculated.The present invention determines that fault point distance, outstanding feature are the requirements for there was only installation region to the installation site of test point by the fault current information between test point, has biggish adaptability in practical engineering applications.
Description
Technical field
The present invention relates to fault detection technique field, specially a kind of non-contact 4 points of joints of distributed traveling wave fault location
Method.
Background technique
Although method is dominated at midpoint reduces the requirement to installation point, it is required that point one group of test point of installation in the line,
Route midpoint region still may be not suitable for install test point region, so the requirement to installation point also need further it is weak
Change.4 combination methods are to install 4 groups of test points on the line thus, and event is determined by the fault current information between test point
Barrier point distance, outstanding feature is the requirement for there was only installation region to the installation site of test point, is had in practical engineering applications
There is biggish adaptability.
Summary of the invention
It is above-mentioned to solve the purpose of the present invention is to provide a kind of 4 combination methods of non-contact distributed traveling wave fault location
The problem of being proposed in background technique.
To achieve the above object, the invention provides the following technical scheme: a kind of non-contact distributed traveling wave fault location four
Point combination method, route is divided into three sections by mono- Lx of fault point Lx and its mirror image work L, is all to have in the test point of route head-end sections
Test point is imitated, when the then section of effective test point in L1-L2 occurs for failure are as follows:
It is proposed that the installation site of 4 test points is required as shown in formula (2) using formula (1):
Preferably, transmission line of electricity is divided into 1,2,3,4,5 five section by 4 test points；It is examined at test point Y1, Y2, Y3, Y4
The traveling wave step-out time measured is △ t1, △ t2, △ t3, △ t4, then when route is in different section failures, each test point
Time difference meets different rules: when failure occurs in section 1, effective test point be Y1 and Y2, preceding the two of Y1 and Y2 at this time
The sequence of a traveling wave can determine, at this time shown in corresponding range equation such as formula (3):
When failure occurs in section 2, there is LY1 < LY2 < L/2, therefore Y1 is effective test point, range equation can table at this time
It is shown as shown in Equation 4:
Failure occurs at section 3, and there are two kinds of situations, and when failure occurs to put upstream in the line, range equation can
Shown in expression (5):
When failure occurs to put downstream in the line, range equation is represented by shown in formula (6):
Failure occurs at section 4, has L/2 < LX < LY1, therefore Y4 is effective test point, range equation can indicate at this time
For shown in formula (7):
Failure occurs at section 5, and effective test point is Y3 and Y4, and the sequence of the first two traveling wave of Y3 and Y4 can be true at this time
It is fixed, at this time shown in corresponding range equation such as formula (8):
The determination of range equation, formula (3)-(8), in addition to section 3, range equation can be uniquely determined in other sections, and
Two equations respectively correspond the upstream side and two kinds of downstream side situation that fault point is put in the line in section 3, need to be to failure point
It sets and substantially judges, by formula (2-33) it is found that the obtained modulus time difference size of test point is at a distance from fault point to test point
Directly proportional, when setting the distance between test point Y2 and Y3 as L23, the modulus time difference of test point Yi is △ ti, can by formula (2-33)
Approximate distance Lx2 of the fault point away from test point Y2 is obtained, is represented by as shown in formula (9)
Preferably, when the approximate location that can determine fault point by comparing the modulus time difference between two test points, therefore
It, can be by comparing the mould between test point Y2 and Y3 when failure occurs between test point Y2 and Y3 in 4 combination methods
The amount time difference determines the approximate location of fault point, further judges that selection formula (5) or formula (6) are come to fault point precision ranging.Root
Formula (10) are represented by according to the final range equation of 4 combination methods known to above-mentioned analysis:
Preferably, the specific steps are as follows:
A, on the given route MN that overall length is L, four test points Y1, Y2, Y3, Y4 are symmetrical arranged, and have LY1≤
10km, LY4≤10km；
B, when failure is between Y2 and Y3, the approximate location of fault point is calculated using formula (9), to judge event
The upstream or downstream that barrier point is put in the line.
C, according to the time difference between guilty culprit section and corresponding first three traveling wave of test point, substituting into formula (10) can be counted
Calculate position of failure point.
Compared with prior art, right on the given route MN that overall length is L the beneficial effects of the present invention are: in the present invention
Claim setting four test points Y1, Y2, Y3, Y4, and has LY1≤ 10km, LY4≤10km.When failure is between Y2 and Y3, meter
The approximate location for calculating fault point, to judge upstream or downstream that fault point is put in the line.According to guilty culprit section
Time difference between corresponding first three traveling wave of test point, position of failure point can be calculated.According to guilty culprit section and right
The time difference between first three traveling wave of test point is answered, position of failure point is calculated.The present invention passes through the failure electricity between test point
Stream information determines fault point distance, and outstanding feature is the requirement for there was only installation region to the installation site of test point, in reality
There is biggish adaptability when the engineer application of border.
Detailed description of the invention
Fig. 1 is 4 combination method fault localization schematic view of the mounting position of the invention.
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
Site preparation 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.
Referring to Fig. 1, the present invention provides a kind of technical solution: a kind of non-contact 4 points of joints of distributed traveling wave fault location
Method, mono- Lx of fault point Lx and its mirror image work L, is divided into three sections for route, is all effectively to detect in the test point of route head-end sections
Point, when the then section of effective test point in L1-L2 occurs for failure are as follows:
It is proposed that the installation site of 4 test points is required as shown in formula (2) using formula (1):
In the present invention, transmission line of electricity is divided into 1,2,3,4,5 five section by 4 test points；At test point Y1, Y2, Y3, Y4
The traveling wave step-out time detected is △ t1, △ t2, △ t3, △ t4, then when route is in different section failures, each test point
Time difference meet different rules: when failure occur in section 1 when, effective test point be Y1 and Y2, at this time before Y1 and Y2
The sequence of two traveling waves can determine, at this time shown in corresponding range equation such as formula (3):
When failure occurs in section 2, there is LY1 < LY2 < L/2, therefore Y1 is effective test point, range equation can table at this time
It is shown as shown in Equation 4:
Failure occurs at section 3, and there are two kinds of situations, and when failure occurs to put upstream in the line, range equation can
Shown in expression (5):
When failure occurs to put downstream in the line, range equation is represented by shown in formula (6):
Failure occurs at section 4, has L/2 < LX < LY1, therefore Y4 is effective test point, range equation can indicate at this time
For shown in formula (7):
Failure occurs at section 5, and effective test point is Y3 and Y4, and the sequence of the first two traveling wave of Y3 and Y4 can be true at this time
It is fixed, at this time shown in corresponding range equation such as formula (8):
The determination of range equation, formula (3)-(8), in addition to section 3, range equation can be uniquely determined in other sections, and
Two equations respectively correspond the upstream side and two kinds of downstream side situation that fault point is put in the line in section 3, need to be to failure point
It sets and substantially judges, by formula (2-33) it is found that the obtained modulus time difference size of test point is at a distance from fault point to test point
Directly proportional, when setting the distance between test point Y2 and Y3 as L23, the modulus time difference of test point Yi is △ ti, can by formula (2-33)
Approximate distance Lx2 of the fault point away from test point Y2 is obtained, is represented by as shown in formula (9)
Join when the approximate location that can determine fault point by comparing the modulus time difference between two test points, therefore at 4 points
In legal, when failure occurs between test point Y2 and Y3, it can come by comparing the modulus time difference between test point Y2 and Y3
It determines the approximate location of fault point, further judges that selection formula (5) or formula (6) are come to fault point precision ranging.According to above-mentioned point
The final range equation of 4 combination methods is represented by formula (10) known to analysis:
In the present invention, a kind of 4 combination methods of non-contact distributed traveling wave fault location, the specific steps are as follows:
A, on the given route MN that overall length is L, four test points Y1, Y2, Y3, Y4 are symmetrical arranged, and have LY1≤
10km, LY4≤10km；
B, when failure is between Y2 and Y3, the approximate location of fault point is calculated using formula (9), to judge event
The upstream or downstream that barrier point is put in the line.
C, according to the time difference between guilty culprit section and corresponding first three traveling wave of test point, substituting into formula (10) can be counted
Calculate position of failure point.
In conclusion in the present invention, on the given route MN that overall length is L, be symmetrical arranged four test point Y1, Y2, Y3,
Y4, and have LY1≤ 10km, LY4≤10km.When failure is between Y2 and Y3, the approximate location of fault point is calculated, thus
Judge upstream or downstream that fault point is put in the line.According between guilty culprit section and corresponding first three traveling wave of test point
Time difference, position of failure point can be calculated.According between guilty culprit section and corresponding first three traveling wave of test point when
Between it is poor, calculate position of failure point.The present invention determines fault point distance by the fault current information between test point, dashes forward
Feature is the requirement for there was only installation region to the installation site of test point out, has biggish adaptation in practical engineering applications
Property.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (4)
1. a kind of 4 combination methods of non-contact distributed traveling wave fault location, it is characterised in that: fault point Lx and its mirror image work L
Route is divided into three sections by one Lx, is all effective test point in the test point of route head-end sections, when failure occur in L1-L2,
The then section of effective test point are as follows:
It is proposed that the installation site of 4 test points is required as shown in formula (2) using formula (1):
2. one kind according to claim 14 combination methods of non-contact distributed traveling wave fault location, it is characterised in that: defeated
Electric line is divided into 1,2,3,4,5 five section by 4 test points；When the traveling wave detected at test point Y1, Y2, Y3, Y4 reaches
Difference is △ t1, △ t2, △ t3, △ t4, then when route is in different section failures, the time difference of each test point meets different
Rule: when failure occur in section 1 when, effective test point be Y1 and Y2, the sequence of the first two traveling wave of Y1 and Y2 can be true at this time
It is fixed, at this time shown in corresponding range equation such as formula (3):
When failure occurs in section 2, there is LY1 < LY2 < L/2, therefore Y1 is effective test point, range equation is represented by this time
It is as shown in Equation 4:
Failure occurs at section 3, and there are two kinds of situations, and when failure occurs to put upstream in the line, range equation can be indicated
Shown in formula (5):
When failure occurs to put downstream in the line, range equation is represented by shown in formula (6):
Failure occurs at section 4, has L/2 < LX < LY1, therefore Y4 is effective test point, range equation is represented by formula at this time
(7) shown in:
Failure occurs at section 5, and effective test point is Y3 and Y4, and the sequence of the first two traveling wave of Y3 and Y4 can determine at this time,
At this time shown in corresponding range equation such as formula (8):
The determination of range equation, formula (3)-(8), in addition to section 3, range equation can be uniquely determined in other sections, and section 3
In two equations respectively correspond the upstream side and two kinds of downstream side situation that fault point is put in the line, need to be to position of failure point substantially
It judges, by formula (2-33) it is found that the obtained modulus time difference size of test point is directly proportional at a distance from fault point to test point,
When setting the distance between test point Y2 and Y3 as L23, the modulus time difference of test point Yi is △ ti, and failure can be obtained by formula (2-33)
Approximate distance Lx2 of the point away from test point Y2, is represented by as shown in formula (9)
3. one kind according to claim 14 combination methods of non-contact distributed traveling wave fault location, it is characterised in that: when
It can determine the approximate location of fault point by comparing the modulus time difference between two test points, therefore in 4 combination methods, when
When failure is occurred between test point Y2 and Y3, fault point can be determined by comparing the modulus time difference between test point Y2 and Y3
Approximate location, further judge that selection formula (5) or formula (6) are come to fault point precision ranging.According to 4 points of above-mentioned analysis
The final range equation of combination method is represented by formula (10):
4. one kind according to claim 14 combination methods of non-contact distributed traveling wave fault location, it is characterised in that: tool
Steps are as follows for body:
A, on the given route MN that overall length is L, four test points Y1, Y2, Y3, Y4 are symmetrical arranged, and have LY1≤ 10km, LY4
≤10km；
B, when failure is between Y2 and Y3, the approximate location of fault point is calculated using formula (9), to judge fault point
The upstream or downstream put in the line.
C, according to the time difference between guilty culprit section and corresponding first three traveling wave of test point, substituting into formula (10) can be calculated
Position of failure point.
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Citations (6)
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|---|---|---|---|---|
| CN101833058A (en) * | 2010-05-28 | 2010-09-15 | 上海交通大学 | Earth fault distance measurement method based on traveling wave modulus time difference |
| CN102495336A (en) * | 2011-12-29 | 2012-06-13 | 上海交通大学 | Distributed single-phase earth fault ranging system and ranging method thereof |
| CN102830328A (en) * | 2012-08-23 | 2012-12-19 | 上海交通大学 | Distributed fault location method for T-circuit |
| CN103364691A (en) * | 2013-07-09 | 2013-10-23 | 上海交通大学 | Distributed fault location method for overhead line-cable hybrid circuit |
| CN103823156A (en) * | 2014-01-28 | 2014-05-28 | 上海交通大学 | Transmission line distributed type fault positioning method with fault tolerant function |
| CN104198887A (en) * | 2014-08-19 | 2014-12-10 | 国家电网公司 | Fault distance measurement method based on double symmetric check points |
-
2019
- 2019-03-15 CN CN201910199010.5A patent/CN109901017A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101833058A (en) * | 2010-05-28 | 2010-09-15 | 上海交通大学 | Earth fault distance measurement method based on traveling wave modulus time difference |
| CN102495336A (en) * | 2011-12-29 | 2012-06-13 | 上海交通大学 | Distributed single-phase earth fault ranging system and ranging method thereof |
| CN102830328A (en) * | 2012-08-23 | 2012-12-19 | 上海交通大学 | Distributed fault location method for T-circuit |
| CN103364691A (en) * | 2013-07-09 | 2013-10-23 | 上海交通大学 | Distributed fault location method for overhead line-cable hybrid circuit |
| CN103823156A (en) * | 2014-01-28 | 2014-05-28 | 上海交通大学 | Transmission line distributed type fault positioning method with fault tolerant function |
| CN104198887A (en) * | 2014-08-19 | 2014-12-10 | 国家电网公司 | Fault distance measurement method based on double symmetric check points |
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Application publication date: 20190618 |
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