CN106841907A - The fault type judges method of overhead transmission line - Google Patents
The fault type judges method of overhead transmission line Download PDFInfo
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- CN106841907A CN106841907A CN201611141962.4A CN201611141962A CN106841907A CN 106841907 A CN106841907 A CN 106841907A CN 201611141962 A CN201611141962 A CN 201611141962A CN 106841907 A CN106841907 A CN 106841907A
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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
Abstract
The invention discloses a kind of fault type judges method of overhead transmission line, wherein, the method includes：Obtain the fault waveform of electric signal when overhead transmission line breaks down；The corresponding relation for prestoring is called, wherein, the corresponding relation is the corresponding relation of the fault waveform and fault type；Determine the corresponding fault type of the fault waveform according to the corresponding relation, by above-mentioned technical proposal, realize the foundation fault waveform very first time effectively and ground quickly judges fault type at low cost, be easy to subsequently rush to repair work.So as to Traditional Man scene line inspection pattern after solving failure cannot be in very first time anticipation fault type, inefficiency, and the method for installing special line fault identification system additional increased equipment purchase and O＆M cost, so as to raising efficiency and the implacable technical problem of reduces cost contradiction occur.
Description
Technical field
The present invention relates to field of power transmission, in particular to a kind of fault type judges side of overhead transmission line
Method.
Background technology
In the related art, failure wave-recording technology is with fault oscillograph as apparatus carriers.Fault oscillograph is a kind of
The waveform of the changes such as electric current, voltage that can be before autolog line failure and in failure process, time and breaker actuation situation
Device.Pass through the relevant waveform for being recorded, can more accurately analyze and determine fault type, and calculate the substantially model of trouble point
Enclose (apart from number), looked into for failure patrol, analyze and Judging fault, recover normal power supply important evidence is provided.
Fault oscillograph is widely applied in power network, it can not only by failure when recorder data be stored in and deposit
In reservoir, but also can be by the communication interface of microcomputer-based fault recorder, the fault recorder data teletransmission that will be recorded to scheduling unit
Door, serious analysis are carried out by dedicated analysis software to failure situation, are that traffic department analyzes and processes accident, circuit operation in time
Maintenance department's lookup and elimination accident etc. provide scientific basis.
In the related art, there are artificial cognition, the distributed diagnostics system based on traveling wave positioning in terms of fault distinguishing
Mode and the technologies such as system differentiation.
Artificial cognition fault type, is traditional fault distinguishing mode.Although this mode is most reliable, but needs O＆M
Personnel carry out investigation to fault in-situ, waste time and energy, less efficient, and substantially depend on a line operation maintenance personnel
Technical experience, it is therefore desirable to seek more efficient technical method.
Distributed Fault Section Estimation System fault distinguishing technology based on traveling wave, is a kind of new skill in fault distinguishing field
Art, this mode is accurately positioned abort situation by trouble point traveling wave speed, and according to the preliminary failure judgement type of waveform, greatly
Fault distinguishing efficiency is improved greatly, but the method needs to purchase corresponding hardware device, when the circuit of the equipment of installation increases,
Major network carries out relatively costly during popularization and application on a large scale, and subsequently needs to carry out relevant device maintenance, increased O＆M cost.
For in correlation technique, Traditional Man scene line inspection pattern cannot be at first after overhead transmission line breaks down
Between anticipation fault type, inefficiency, and the method for installing special line fault identification system additional increased equipment purchase and
O＆M cost, so as to raising efficiency and the irreconcilable problem of reduces cost contradiction occur, there is presently no effective solution.
The content of the invention
A kind of fault type judges method of overhead transmission line is the embodiment of the invention provides, after at least solving failure
Traditional Man scene line inspection pattern in very first time anticipation fault type, inefficiency, and cannot install special line fault additional
The method of identification system increased equipment purchase and O＆M cost again, non-adjustable with reduces cost contradiction so as to raising efficiency occur
The technical problem of sum.
One side according to embodiments of the present invention, there is provided a kind of fault type judges method of overhead transmission line,
Including：Obtain the fault waveform of electric signal when overhead transmission line breaks down；The corresponding relation for prestoring is called, wherein,
The corresponding relation is the corresponding relation of the fault waveform and fault type；Determine the fault wave according to the corresponding relation
The corresponding fault type of shape.
Alternatively, the corresponding fault type of the fault waveform is determined according to the corresponding relation, including：According to described right
At least one of information that should be related to and be carried in the fault waveform, determines the corresponding fault type of the fault waveform：
The time interval at failure logging moment to insulation breakdown moment, again afterflow short-circuit conditions, the burr that the fault waveform is present
Situation, voltage and/or current waveform smooth situation.
Alternatively, the fault waveform of electric signal when overhead transmission line breaks down is obtained, including：By fault oscillograph
Obtain the fault waveform.
Alternatively, the corresponding fault type of the fault waveform is determined according to the corresponding relation, including：According to described right
The environmental information with the overhead transmission line location should be related to, the corresponding fault type of the fault waveform is determined.
Alternatively, the environmental information includes one below：The weather condition in the area, the landform ground in the area
Looks, the thunder and lightning situation in the area.
Alternatively, the corresponding fault waveform of each fault type includes following characteristics：The corresponding failure of Fisrt fault type
Waveform has following characteristics：It is big then 10 milliseconds to the time interval at insulation breakdown moment from the failure logging moment, exist again
There is burr in afterflow short-circuit conditions, wave edges, wave edges are unsmooth.
Alternatively, the corresponding fault waveform of each fault type includes following characteristics：The corresponding failure of second fault type
Waveform has following characteristics：5 milliseconds are less than from the failure logging moment to the time interval at insulation breakdown moment, in the absence of continuing again
Flow short-circuit situation, waveform is the sine wave of rule.
Alternatively, the corresponding fault waveform of each fault type includes following characteristics：The corresponding failure of 3rd fault type
Waveform has following characteristics：It is more than 50 milliseconds from the failure logging moment to the time interval at insulation breakdown moment, in the absence of again
Afterflow short-circuit conditions, waveform is irregular, and waveform is not presented sinusoidal waveform.
Alternatively, the corresponding fault waveform of each fault type includes following characteristics：The corresponding failure of 4th fault type
Waveform has following characteristics：5 milliseconds are less than from the failure logging moment to the time interval at insulation breakdown moment, in the absence of continuing again
There is burr in flow short-circuit situation, waveform rule, first half-wave of voltage waveform.
Alternatively, the corresponding fault waveform of each fault type includes following characteristics：The corresponding failure of 5th fault type
Waveform has following characteristics：5 milliseconds are less than from the failure logging moment to the insulation breakdown moment, in the absence of the short circuit feelings of afterflow again
Condition, electric current and voltage waveform are irregular, and non-sine state is presented, and wave edges have burr.
In embodiments of the present invention, the fault waveform of electric signal when overhead transmission line breaks down is obtained；Call in advance
The corresponding relation of storage, wherein, the corresponding relation is the corresponding relation of the fault waveform and fault type；According to described right
The corresponding fault type of the determination fault waveform should be related to, by above-mentioned technical proposal, realized according to fault waveform first
Time is effectively and ground judges the reason for breaking down at low cost, is easy to engineer subsequently to repair the failure, and then solve event
Traditional Man scene line inspection pattern in very first time anticipation fault type, inefficiency, and cannot install special circuit additional after barrier
The method of fault identification system increased equipment purchase and O＆M cost again, so as to raising efficiency occur with reduces cost contradiction not
Reconcilable technical problem.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, this hair
Bright schematic description and description does not constitute inappropriate limitation of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 is a kind of flow chart of the fault type judges method of overhead transmission line according to embodiments of the present invention；
Fig. 2 is the Fisrt fault oscillogram of the external force failure short in the preferred embodiment of the present invention；
Fig. 3 is the second fault waveform figure of the external force failure short in the preferred embodiment of the present invention；
Fig. 4 is the 3rd fault waveform figure of the external force failure short in the preferred embodiment of the present invention；
Fig. 5 is the 4th fault waveform figure of the external force failure short in the preferred embodiment of the present invention；
Fig. 6 is the 5th fault waveform figure of the external force failure short in the preferred embodiment of the present invention；
Fig. 7 is the fault waveform figure of the thunderbolt shielding in the preferred embodiment of the present invention；
Fig. 8 is the fault waveform figure of the thunderbolt counterattack in the preferred embodiment of the present invention；
Fig. 9 is the fault waveform figure of the bird pest failure in the preferred embodiment of the present invention；
Figure 10 is the fault waveform figure of the wind leaning fault in the preferred embodiment of the present invention；
Figure 11 is the fault waveform figure of the ice trouble failure in the preferred embodiment of the present invention.
Specific embodiment
In order that those skilled in the art more fully understand the present invention program, below in conjunction with the embodiment of the present invention
Accompanying drawing, is clearly and completely described to the technical scheme in the embodiment of the present invention, it is clear that described embodiment is only
The embodiment of a part of the invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained under the premise of creative work is not made, should all belong to the model of present invention protection
Enclose.
It should be noted that term " first ", " in description and claims of this specification and above-mentioned accompanying drawing
Two " it is etc. for distinguishing similar object, without for describing specific order or precedence.It should be appreciated that so using
Data can exchange in the appropriate case, so as to embodiments of the invention described herein can with except illustrating herein or
Order beyond those of description is implemented.Additionally, term " comprising " and " having " and their any deformation, it is intended that cover
Lid is non-exclusive to be included, for example, the process, method, system, product or the equipment that contain series of steps or unit are not necessarily limited to
Those steps or unit clearly listed, but may include not list clearly or for these processes, method, product
Or other intrinsic steps of equipment or unit.
Embodiment 1
According to embodiments of the present invention, there is provided a kind of fault type judges embodiment of the method for overhead transmission line, it is necessary to
Illustrate, can be in the such as one group computer system of computer executable instructions the step of the flow of accompanying drawing is illustrated
Perform, and, although logical order is shown in flow charts, but in some cases, can be with suitable different from herein
Sequence performs shown or described step.
You need to add is that, the technical scheme described in present specification can apply to the failure of overhead transmission line
During type decision, the reason for causing overhead transmission line failure is determined by the waveform situation of fault waveform, is thunderbolt,
Ice trouble, windburn etc., also referred to as fault type, certainly, the technical scheme in present specification is not limited to above-mentioned application scenarios.
Fig. 1 is a kind of flow chart of the fault type judges method of overhead transmission line according to embodiments of the present invention, such as
Shown in Fig. 1, the method is comprised the following steps：
Step S102, obtains the fault waveform of electric signal when overhead transmission line breaks down；
Step S104, calls the corresponding relation for prestoring, wherein, the corresponding relation is the fault waveform and fault type
Corresponding relation；
Step S106, the corresponding fault type of the fault waveform is determined according to the corresponding relation.
Alternatively, according at least one of information carried in the corresponding relation and the fault waveform, the failure is determined
The corresponding fault type of waveform：The time interval at failure logging moment to insulation breakdown moment, again afterflow short-circuit conditions, the event
The burr situation that barrier waveform is present, voltage and/or the smooth situation of current waveform.
Alternatively, the fault waveform is obtained by fault oscillograph.
Alternatively, according to the corresponding relation and the environmental information of the overhead transmission line location, the fault wave is determined
The corresponding fault type of shape.
Alternatively, the environmental information includes one below：The weather condition of this area, the topography and geomorphology of this area, the ground
The thunder and lightning situation in area.
Feature that the corresponding fault waveform of each fault type has below is recorded, it is necessary to explanation, every kind of failure
The fault waveform of type is not necessarily intended to comply fully with following characteristics, may can there is narrow difference when judging.Specifically in reality
Using when, following Fisrt fault type can be foreign matter short trouble or mechanical short failure；Second fault type can be
Lightning fault；3rd fault type can be bird pest failure, and the 4th fault type can be windburn failure, and the 5th fault type can
Being ice trouble failure.When deterministic process is carried out, the weather conditions in the place broken down can be combined, such as it is determined that failure
Hovered between lightning fault and windburn during type, local thunderstorm weather can be combined, determine that fault type is lightning fault.
Alternatively, the corresponding fault waveform of each fault type includes following characteristics：The corresponding failure of Fisrt fault type
Waveform has following characteristics：It is more than 10 milliseconds from the failure logging moment to the time interval at insulation breakdown moment, exists and continue again
There is burr in flow short-circuit situation, wave edges, wave edges are unsmooth.
Alternatively, the corresponding fault waveform of each fault type includes following characteristics：The corresponding failure of second fault type
Waveform has following characteristics：5 milliseconds are less than from the failure logging moment to the time interval at insulation breakdown moment, in the absence of continuing again
Flow short-circuit situation, waveform is the sine wave of rule.
Alternatively, the corresponding fault waveform of each fault type includes following characteristics：The corresponding failure of 3rd fault type
Waveform has following characteristics：It is more than 50 milliseconds from the failure logging moment to the time interval at insulation breakdown moment, in the absence of again
Afterflow short-circuit conditions, waveform is irregular, and waveform is not presented sinusoidal waveform.You need to add is that, waveform rule is irregularly waveform
Whether the meaning of rule.
Alternatively, the corresponding fault waveform of each fault type includes following characteristics：The corresponding failure of 4th fault type
Waveform has following characteristics：5 milliseconds are less than from the failure logging moment to the time interval at insulation breakdown moment, in the absence of continuing again
There is burr in flow short-circuit situation, waveform rule, first half-wave of voltage waveform.
Alternatively, the corresponding fault waveform of each fault type includes following characteristics：The corresponding failure of 5th fault type
Waveform has following characteristics：5 milliseconds are less than from the failure logging moment to the insulation breakdown moment, in the absence of the short circuit feelings of afterflow again
Condition, electric current and voltage waveform are irregular, and non-sine state is presented, and wave edges have burr.
It is described in detail below in conjunction with the preferred embodiment of the present invention.
A kind of fault type method of discrimination based on fault current waveform is proposed in the preferred embodiment of the present invention.By control
The factor such as same type of fault current wave head, steepness, wavelength time, separate, it is (different for overhead transmission line thunderbolt, external force
Thing short circuit and mechanical short), bird pest, windburn, the failure such as ice trouble pollution flashover, he the regularity of fault current is summarized, so as to pass through failure
Record ripple figure and typical fault electric current collection of illustrative plates, after a failure the very first time carry out fault type anticipation, and combination failure information, wrap
The information such as fault section weather condition, topography and geomorphology, lightning monitoring system are included, comprehensive descision is carried out.
Method described in the preferred embodiment of the present invention quickly judges that complete technical scheme is as follows：
First, fault current feature is observed, including the event of wave head, failure initial time, waveform rule degree, several phases
Hinder, whether there is follow-up second short circuit phenomenon to occur, then quickly judged according to such as drawing a conclusion：
1st, external force failure and failure wave-recording waveform corresponding relation (external force failure such as automobile short)
(1) it is general from the failure logging moment to the insulation breakdown moment, it is separated by tens to hundreds of milliseconds, reflection is out of order and is punctured
It is the process for gradually accumulating, few instantaneitys puncture.
(2) failure often has afterflow short-circuit conditions again, may be with the crane intermittent overlap joint of short or foreign matter repeatedly
Wire has relation.
(3) there is burr in current-voltage waveform sometimes, less smooth, and mutation is obvious, may be with metallic contact resistance
Transition is relevant.
(4) short-circuit-type is often two kinds of forms of single-phase earthing and two phase faults, or have two phase ground, if there is phase
Between short circuit, then foreign matter overlap joint likelihood of failure it is larger.
2nd, lightning fault and failure wave-recording waveform corresponding relation
(1) it is general from the failure logging moment to the insulation breakdown moment, interval time it is very short in addition at the beginning of failure starts i.e.
Insulation breakdown is formed, is reflected under thunder-strike current, failure punctures mostly instantaneity and punctures, in some cases, lightning current may
Up to hundreds of kilo-amperes, insulation breakdown instantaneously can be formed flashover by so big lightning current.
(2) the few afterflow short-circuit conditions again of failure, lightning current waveform is mostly the sine wave of rule, when failure occurs
Electric current can undergo mutation, and amplitude is generally 15-28kA, and fault waveform neatly stablizes (sine wave).
(3) short-circuit-type is often single-phase earthing, it some times happens that two-phase and three-phase ground failure, but less generation is alternate
Short circuit.
3rd, bird pest failure and failure wave-recording waveform corresponding relation
(1) from the failure logging moment to the insulation breakdown moment, interval time is more long, and reflection is out of order, and to puncture be gradually to accumulate
Process, rarer instantaneity punctures, if birds droppings is directly dripped on the insulator, then may instantaneous breakdown.
(2) failure is less there are afterflow short-circuit conditions again, and electric current can undergo mutation when failure occurs, and amplitude is generally
15-28kA, fault waveform neatly stablizes (sine wave).
(3) current-voltage waveform is irregular, and sinusoidal waveform is not presented.
(4) short-circuit-type is often single-phase earthing, two phase ground, three-phase ground or phase fault situation seldom occurs.
4th, wind leaning fault and failure wave-recording waveform corresponding relation
(1) from the failure logging moment to the insulation breakdown moment, interval time is shorter, and fault current is smaller.
(2) failure is less there are afterflow short-circuit conditions again, and current-voltage waveform comparison rule, one half-wave of voltage regulation is deposited
In burr, residual voltage has oscillation on small scale after fault recovery, with " tail ".
(3) short-circuit-type is often single-phase earthing form, and short-circuit two kinds of forms between two-phase are had sometimes.
5th, ice trouble failure and failure wave-recording waveform corresponding relation
(1) from the failure logging moment to the insulation breakdown moment, interval time is shorter, and fault current is smaller.
(2) failure is less there are afterflow short-circuit conditions again, and current-voltage waveform is irregular, and non-sinusoidal waveform is showed sometimes
State.
(3) short-circuit-type is often single-phase earthing form, and the form such as short circuit between two-phase is had sometimes.
Above-mentioned is the literature record of each fault type, below in conjunction with specific oscillogram to the technical side in present specification
Case is illustrated.
Fig. 2 is the Fisrt fault oscillogram of the external force failure short in the preferred embodiment of the present invention, as shown in Fig. 2
Voltage class in the overhead transmission line is 110kV, and the fault waveform has the characteristics that：1, the insulation breakdown moment is away from failure
About 60 milliseconds of record ripple start time interval, the time is more long；2, there is afterflow Grounding again.
Fig. 3 is the second fault waveform figure of the external force failure short in the preferred embodiment of the present invention, as shown in figure 3,
Voltage class in the overhead transmission line is 220kV, and the fault waveform has the characteristics that：1, the insulation breakdown moment is away from failure
About 120 milliseconds of record ripple start time interval, the time is more long；2, there is afterflow Grounding again；3, there is hair in wave edges
Thorn phenomenon, it is unsmooth.
Fig. 4 is the 3rd fault waveform figure of the external force failure short in the preferred embodiment of the present invention, as shown in figure 4,
Voltage class in the overhead transmission line is 110kV, and the fault waveform has the characteristics that：1. the insulation breakdown moment is away from failure
About 40 milliseconds of record ripple start time interval, the time is more long.2. afterflow Grounding again is occurred.
Fig. 5 is the 4th fault waveform figure of the external force failure short in the preferred embodiment of the present invention, as shown in figure 5,
Voltage class in the overhead transmission line is 220kV, and the fault waveform has the characteristics that：1. the insulation breakdown moment is away from failure
About 100 milliseconds of record ripple start time interval, the time is more long.2. there is burr phenomena in wave edges, unsmooth.
Fig. 6 is the 5th fault waveform figure of the external force failure short in the preferred embodiment of the present invention, as shown in fig. 6,
Voltage class in the overhead transmission line is 220kV, and the fault waveform has the characteristics that：1. the insulation breakdown moment is away from failure
About 100 milliseconds of record ripple start time interval, the time is more long.2. wave edges are unsmooth.
Fig. 7 is the fault waveform figure of the thunderbolt shielding in the preferred embodiment of the present invention, as shown in fig. 7, this is built on stilts defeated
Voltage class in electric line is 220kV, and the fault waveform has the characteristics that：1. the insulation breakdown moment start away from failure wave-recording
Time at intervals is zero, i.e. failure recorded broadcast starts zero moment insulation breakdown occurs.2. wave edges are smoothed, and are regular sine wave.
3. without afterflow short circuit phenomenon again.
Fig. 8 is the fault waveform figure of the thunderbolt counterattack in the preferred embodiment of the present invention, as shown in figure 8, this is built on stilts defeated
Voltage class in electric line is 220kV, and the fault waveform has the characteristics that 1. insulation breakdown moment started away from failure wave-recording
Time at intervals is about 30 milliseconds, i.e. failure recorded broadcast and starts just insulation breakdown.2. wave edges are smoothed, and are regular sinusoidal
Ripple.3. without afterflow short circuit phenomenon again.
Fig. 9 is the fault waveform figure of the bird pest failure in the preferred embodiment of the present invention, as shown in figure 9, this is built on stilts defeated
Voltage class in electric line is 220kV, and the fault waveform has the characteristics that：1. the insulation breakdown moment start away from failure wave-recording
Time at intervals is about 100 milliseconds, and interval time is more long.2. voltage waveform is in disorder, irregular.3. existing without the short circuit of afterflow again
As.
Figure 10 is the fault waveform figure of the wind leaning fault in the preferred embodiment of the present invention, and as shown in Figure 10, this is maked somebody a mere figurehead
Voltage class in transmission line of electricity is 220kV, and the fault waveform has the characteristics that：1. the insulation breakdown moment opened away from failure wave-recording
Beginning time at intervals is zero, i.e. failure recorded broadcast starts zero moment insulation breakdown occurs.2. voltage waveform edge-smoothing, be rule just
There is burr in string ripple, first half-wave.3. without afterflow short circuit phenomenon again.
Figure 11 is the fault waveform figure of the ice trouble failure in the preferred embodiment of the present invention, and as shown in figure 11, this is maked somebody a mere figurehead
Voltage class in transmission line of electricity is 220kV, and the fault waveform has the characteristics that：1. the insulation breakdown moment opened away from failure wave-recording
Beginning time at intervals is zero, i.e. failure recorded broadcast starts zero moment insulation breakdown occurs.2. voltage waveform is in disorder, irregular, side
There is burr in edge.3. without afterflow short circuit phenomenon again.
Proposed in the preferred embodiment of the present invention it is a kind of can raising efficiency and can reduces cost new fault type it is pre-
Sentence mode.Operation maintenance personnel need not carry out site inspection just can substantially understand failure situation, by the judgement to fault waveform, energy
Fault type is substantially judged, so as to for breakdown repair maintenance work offers convenience, improve efficiency.In addition, the present invention is only needed to
Ready-made fault waveform data, are not required to additionally purchase special equipment, without later stage O＆M, eliminate purchase cost and O＆M into
This, staff is by after training, you can grasp the method, because almost cost free, therefore can be promoted with large-scale application.Fortune
After dimension personnel have grasped quick judgement skill, it is modified and improves by practice, it would be possible to technology is carried out further complete
Kind work.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of fault type judges method of overhead transmission line, it is characterised in that including：
Obtain the fault waveform of electric signal when overhead transmission line breaks down；
The corresponding relation for prestoring is called, wherein, the corresponding relation is that the fault waveform is corresponding with fault type to close
System；
Determine the corresponding fault type of the fault waveform according to the corresponding relation.
2. method according to claim 1, it is characterised in that determine the fault waveform correspondence according to the corresponding relation
Fault type, including：
According at least one of information carried in the corresponding relation and the fault waveform, the fault waveform pair is determined
The fault type answered：
The time interval at failure logging moment to insulation breakdown moment, afterflow short-circuit conditions again, what the fault waveform was present
Burr situation, voltage and/or current waveform smooth situation.
3. method according to claim 1, it is characterised in that obtain the event of electric signal when overhead transmission line breaks down
Barrier waveform, including：
The fault waveform is obtained by fault oscillograph.
4. method according to claim 1, it is characterised in that determine the fault waveform correspondence according to the corresponding relation
Fault type, including：
According to the corresponding relation and the environmental information of the overhead transmission line location, the fault waveform correspondence is determined
Fault type.
5. method according to claim 4, it is characterised in that the environmental information includes one below：The area
Weather condition, the topography and geomorphology in the area, the thunder and lightning situation in the area.
6. method according to claim 1, it is characterised in that the corresponding fault waveform of each fault type includes following spy
Levy：
The corresponding fault waveform of Fisrt fault type has following characteristics：From the failure logging moment to the time at insulation breakdown moment
Interval is big then 10 milliseconds, there are afterflow short-circuit conditions again, and wave edges have burr, and wave edges are unsmooth.
7. method according to claim 1, it is characterised in that the corresponding fault waveform of each fault type includes following spy
Levy：
The corresponding fault waveform of second fault type has following characteristics：From the failure logging moment to the time at insulation breakdown moment
Interval is less than 5 milliseconds, and in the absence of afterflow short-circuit conditions again, waveform is the sine wave of rule.
8. method according to claim 1, it is characterised in that the corresponding fault waveform of each fault type includes following spy
Levy：
The corresponding fault waveform of 3rd fault type has following characteristics：From the failure logging moment to the time at insulation breakdown moment
Interval is more than 50 milliseconds, and in the absence of afterflow short-circuit conditions again, waveform is irregular, and waveform is not presented sinusoidal waveform.
9. method according to claim 1, it is characterised in that the corresponding fault waveform of each fault type includes following spy
Levy：
The corresponding fault waveform of 4th fault type has following characteristics：From the failure logging moment to the time at insulation breakdown moment
Interval is less than 5 milliseconds, and in the absence of afterflow short-circuit conditions again, waveform rule, first half-wave of voltage waveform has burr.
10. method according to claim 1, it is characterised in that the corresponding fault waveform of each fault type includes following
Feature：
The corresponding fault waveform of 5th fault type has following characteristics：5 are less than from the failure logging moment to the insulation breakdown moment
Millisecond, in the absence of afterflow short-circuit conditions again, electric current and voltage waveform are irregular, and non-sine state is presented, and wave edges are present
Burr.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107329046A (en) * | 2017-07-24 | 2017-11-07 | 西安交通大学 | Direct current overhead line thunderbolt recognition methods based on Modulus Analysis |
| CN110320448A (en) * | 2019-08-05 | 2019-10-11 | 国家电网有限公司 | A kind of distribution feeder fault wave recording device |
| CN113189448A (en) * | 2021-04-29 | 2021-07-30 | 广东电网有限责任公司清远供电局 | Method and device for detecting fault type of power transmission line |
| CN114113911A (en) * | 2021-12-06 | 2022-03-01 | 国网山东省电力公司电力科学研究院 | Fault waveform-based fault type discrimination method and discrimination system |
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