CN110470945A - A kind of power transmission and transformation line fault detecting and positioning method - Google Patents
A kind of power transmission and transformation line fault detecting and positioning method Download PDFInfo
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- CN110470945A CN110470945A CN201910635383.2A CN201910635383A CN110470945A CN 110470945 A CN110470945 A CN 110470945A CN 201910635383 A CN201910635383 A CN 201910635383A CN 110470945 A CN110470945 A CN 110470945A
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- frequency signal
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000005540 biological transmission Effects 0.000 title claims abstract description 19
- 230000009466 transformation Effects 0.000 title claims abstract description 15
- 238000001514 detection method Methods 0.000 claims abstract description 12
- 238000004891 communication Methods 0.000 claims description 3
- 238000012790 confirmation Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 claims 1
- 238000011835 investigation Methods 0.000 abstract description 5
- 238000002347 injection Methods 0.000 abstract description 3
- 239000007924 injection Substances 0.000 abstract description 3
- 238000004458 analytical method Methods 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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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
-
- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- Locating Faults (AREA)
Abstract
The invention discloses a kind of power transmission and transformation line fault detecting and positioning methods, a kind of power transmission and transformation line fault detecting and positioning method, the invention is by being provided with two-frequency signal receiving end in each node, by two-frequency signal generator from failure both ends Injection Current signal, the signal obtained by each node two-frequency signal receiving end, pass through the signal at faulty line both ends, determine the Position Approximate of faulty line, it is to carry out on the ground that two-frequency signal, which detects signal code, far from conducting wire, detect work safety, speed, after two end node locations for determining faulty line, emit traveling wave by oscillograph, according to the run duration of traveling wave, it can determine the specific location of fault point, in the case where the positioning of both-end traveling wave positioning mode is effective, unique traveling wave positioning result is filtered out using both-end fault analytical method, effectively to avoid reflected traveling wave and refraction The interference of traveling wave, detection positioning is more accurate, and investigation speed is fast.
Description
Technical field
The present invention relates to line faults to detect field of locating technology, specially a kind of power transmission and transformation line fault detection positioning side
Method.
Background technique
With the continuous development of electric system, super-pressure, long distance transmission line are more and more, line fault point it is accurate
Positioning more shows its importance, seeks the workload looked into reduce route, shortens fault correction time, save a large amount of manpower, object
Power improves power supply reliability, reduces loss of outage, reinforces and improve system operation and management level, there is an urgent need to occur in system
Fault point can be accurately searched when failure, existing defeated modified line road is checked when fault point is checked by energization investigation method, is arranged
Heavy workload is looked into, the speed of investigation is slow, and general fault zone is only able to find after investigation, fault point should not be directly searched out,
Therefore, it is necessary for designing a kind of power transmission and transformation line fault detecting and positioning method.
Summary of the invention
The purpose of the present invention is to provide a kind of power transmission and transformation line fault detecting and positioning methods, to solve above-mentioned background technique
The problem of middle proposition.
In order to solve the above technical problem, the present invention provides following technical solutions: a kind of power transmission and transformation line fault detection is fixed
Position method, includes the following steps:
S1: disengagement failure line power, outlet switch releasing are spare, and detection confirmation no-voltage on the split faulty line of side outside the Pass
In the presence of；
S2: two-frequency signal source is accessed in switch outside, injects two-frequency signal electric current to faulty line；
S3: two-frequency signal receiving end acquires the double frequency current signal of transmission line of electricity respectively, and double frequency current signal can be in fault point
Stealpass is defeated, and the signal receiving end of the next node of interruption does not receive current signal, thus determines two end nodes of faulty line
Position；
S4: it carries out determining fault wire section by the signal that the two-frequency signal receiving end of each node and branch end obtains；
S5: after obtaining faulty line segment signal, traveling wave is emitted to faulty line by oscillograph from failure terminal both ends, is passed through
The time that traveling wave returns calculates fault point；
S6: by calculating positioning of the fault point realization to fault detection.
According to the above technical scheme, the positioning system includes two-frequency signal generator, two-frequency signal receiving end and oscillography
Device, the two-frequency signal generator are arranged at route both ends, the two-frequency signal receiving end be arranged in each route node and
Both ends and each node and the branch end of route is arranged in branch end, the oscillograph.
According to the above technical scheme, the failure point calculating method is,
；
In formula: L1Expression fault point is at a distance from route one end, T1For launch time, T2For receiving time, v is row wave speed.
According to the above technical scheme, described to there is node to be not received by current signal, first determine that connecting node is failure
Point.
According to the above technical scheme, it is respectively set in the two-frequency signal generator, two-frequency signal receiving end and oscillograph
There is network communication module, and is connect with GPS monitoring system.
According to the above technical scheme, in the S5, after oscillograph emits traveling wave, the length of both ends distance fault point is differed
In the length of two nodes, then it is determined as at two or the above fault point at two, checks one by one.
Compared with prior art, the beneficial effects obtained by the present invention are as follows being: the invention, it is double by being provided in each node
Frequency signal receiving end is connect by two-frequency signal generator from failure both ends Injection Current signal by each node two-frequency signal
The signal that receiving end obtains determines that the Position Approximate of faulty line, two-frequency signal detect signal by the signal at faulty line both ends
Electric current is to carry out on the ground, far from conducting wire, detects work safety, speed, after two end node locations for determining faulty line,
Emitting traveling wave by oscillograph can determine the specific location of fault point according to the run duration of traveling wave, position in both-end traveling wave
Method positions in effective situation, unique traveling wave positioning result is filtered out using both-end fault analytical method, effectively to avoid reflecting
Traveling wave and the interference for reflecting traveling wave, detection positioning is more accurate, and investigation speed is fast.
Detailed description of the invention
Attached drawing is used to provide further understanding of the present invention, and constitutes part of specification, with reality of the invention
It applies example to be used to explain the present invention together, not be construed as limiting the invention.In the accompanying drawings:
Fig. 1 is flow chart of the method for the present 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 power transmission and transformation line fault detecting and positioning method, including
Following steps:
S1: disengagement failure line power, outlet switch releasing are spare, and detection confirmation no-voltage on the split faulty line of side outside the Pass
In the presence of；
S2: two-frequency signal source is accessed in switch outside, injects two-frequency signal electric current to faulty line；
S3: two-frequency signal receiving end acquires the double frequency current signal of transmission line of electricity respectively, and double frequency current signal can be in fault point
Stealpass is defeated, and the signal receiving end of the next node of interruption does not receive current signal, thus determines two end nodes of faulty line
Position；
S4: it carries out determining fault wire section by the signal that the two-frequency signal receiving end of each node and branch end obtains；
S5: after obtaining faulty line segment signal, traveling wave is emitted to faulty line by oscillograph from failure terminal both ends, is passed through
The time that traveling wave returns calculates fault point；
S6: by calculating positioning of the fault point realization to fault detection.
According to the above technical scheme, positioning system includes two-frequency signal generator, two-frequency signal receiving end and oscillograph, double
Frequency signal generator is arranged at route both ends, and the node and branch end of each route, oscillograph is arranged in two-frequency signal receiving end
Both ends and each node and the branch end of route are set.
According to the above technical scheme, failure point calculating method is,
；
In formula: L1Expression fault point is at a distance from route one end, T1For launch time, T2For receiving time, v is row wave speed.
According to the above technical scheme, there is node to be not received by current signal, first determining that connecting node is fault point.
According to the above technical scheme, net is respectively arranged in two-frequency signal generator, two-frequency signal receiving end and oscillograph
Network communication module, and connect with GPS monitoring system.
According to the above technical scheme, in S5, after oscillograph emits traveling wave, the length of both ends distance fault point is not equal to two
The length of node, then be determined as at two or the above fault point at two, checks one by one.
Based on above-mentioned, it is an advantage of the current invention that it is of the invention, by being provided with two-frequency signal receiving end in each node,
By two-frequency signal generator from failure both ends Injection Current signal, the letter obtained by each node two-frequency signal receiving end
Number, by the signal at faulty line both ends, determine the Position Approximate of faulty line, it is on ground that two-frequency signal, which detects signal code,
Upper progress detects work safety, speed far from conducting wire, after two end node locations for determining faulty line, is sent out by oscillograph
Traveling wave is penetrated, according to the run duration of traveling wave, can determine the specific location of fault point, detection positioning is more accurate, checks speed
Fastly, when checking failure, if there is many places failure, it can debug one by one from the initial segment, omission will not be generated.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.
Finally, it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not intended to restrict the invention,
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features.
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (6)
1. a kind of power transmission and transformation line fault detecting and positioning method, include the following steps: it is characterized by:
S1: disengagement failure line power, outlet switch releasing are spare, and detection confirmation no-voltage on the split faulty line of side outside the Pass
In the presence of；
S2: two-frequency signal source is accessed in switch outside, injects two-frequency signal electric current to faulty line；
S3: two-frequency signal receiving end acquires the double frequency current signal of transmission line of electricity respectively, and double frequency current signal can be in fault point
Stealpass is defeated, and the signal receiving end of the next node of interruption does not receive current signal, thus determines two end nodes of faulty line
Position；
S4: it carries out determining fault wire section by the signal that the two-frequency signal receiving end of each node and branch end obtains；
S5: after obtaining faulty line segment signal, traveling wave is emitted to faulty line by oscillograph from failure terminal both ends, is passed through
The time that traveling wave returns calculates fault point；
S6: by calculating positioning of the fault point realization to fault detection.
2. a kind of power transmission and transformation line fault detection positioning system according to claim 1, it is characterised in that: the positioning system
System includes two-frequency signal generator, two-frequency signal receiving end and oscillograph, and the two-frequency signal generator is arranged at route both ends,
The two-frequency signal receiving end is arranged in the node and branch end of each route, and the both ends of route and each are arranged in the oscillograph
A node and branch end.
3. a kind of power transmission and transformation line fault detecting and positioning method according to claim 1, it is characterised in that: the fault point
Calculation method is,
；
In formula: L1Expression fault point is at a distance from route one end, T1For launch time, T2For receiving time, v is row wave speed.
4. a kind of power transmission and transformation line fault detecting and positioning method according to claim 1, it is characterised in that: described to have section
Point is not received by current signal, first determines that connecting node is fault point.
5. a kind of power transmission and transformation line fault detecting and positioning method according to claim 1, it is characterised in that: the double frequency letter
It is respectively arranged with network communication module in number generator, two-frequency signal receiving end and oscillograph, and is connect with GPS monitoring system.
6. a kind of power transmission and transformation line fault detecting and positioning method according to claim 1, it is characterised in that: in the S5,
After oscillograph emits traveling wave, the length of both ends distance fault point is not equal to the length of two nodes, then is determined as at two or at two
The above fault point, is checked one by one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910635383.2A CN110470945A (en) | 2019-07-15 | 2019-07-15 | A kind of power transmission and transformation line fault detecting and positioning method |
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| CN201910635383.2A CN110470945A (en) | 2019-07-15 | 2019-07-15 | A kind of power transmission and transformation line fault detecting and positioning method |
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Cited By (3)
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| CN111208389A (en) * | 2020-02-27 | 2020-05-29 | 戚宇林 | System and method for detecting single-phase earth fault of power distribution network |
| CN113917296A (en) * | 2021-09-30 | 2022-01-11 | 海南电网有限责任公司电力科学研究院 | Diagnosis method for circuit multi-point hidden danger discharge |
| CN114325229A (en) * | 2021-12-27 | 2022-04-12 | 深圳供电局有限公司 | A Beidou-based transmission line fault point location method and system |
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| CN111208389A (en) * | 2020-02-27 | 2020-05-29 | 戚宇林 | System and method for detecting single-phase earth fault of power distribution network |
| CN113917296A (en) * | 2021-09-30 | 2022-01-11 | 海南电网有限责任公司电力科学研究院 | Diagnosis method for circuit multi-point hidden danger discharge |
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| CN114325229B (en) * | 2021-12-27 | 2024-07-12 | 深圳供电局有限公司 | Beidou-based power transmission line fault point positioning method and system |
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