CN106646126A - Method, device and system for locating fault - Google Patents
Method, device and system for locating fault Download PDFInfo
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- CN106646126A CN106646126A CN201611132741.0A CN201611132741A CN106646126A CN 106646126 A CN106646126 A CN 106646126A CN 201611132741 A CN201611132741 A CN 201611132741A CN 106646126 A CN106646126 A CN 106646126A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead
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Abstract
The invention discloses a method, device and system for locating a fault. The method comprises the steps: obtaining a current value of a zero sequence current between any two indicators; comparing current values of the zero sequence currents between any two indicators, and obtaining a first comparison result; obtaining two indicators with the big current values of the zero sequence currents according to the first comparison result; and determining that a grounding point is a fault grounding point if the grounding point is located between the two indicators with the big current values of the zero sequence currents. The method solves a technical problem that the fault grounding point of an overhead line cannot be located in the prior art.
Description
Technical field
The present invention relates to distribution automation field, in particular to a kind of method of fault location, device and it is
System.
Background technology
With the development and the continuous improvement of the people's material and cultural life level of national economy, to electricity needs more and more
Greatly, user requires more and more higher to power supply quality and power supply reliability.At present power grid enterprises 10KV overhead transmission lines are more complicated,
There is short circuit or during earth fault in overhead transmission line, it is desirable to rapid failure judgement position, fault location, restore electricity.
Power distribution automation is the inexorable trend of power system modernization, and needs can monitor that under normal circumstances power distribution network is transported
Row situation, optimizes the power distribution network method of operation；In case of a failure, also require that rapid determination fault section and locate in time
Reason failure, to complete to restore electricity in time, it is ensured that power supply reliability.But existing fault detection approach mostly is maintenance work personnel
Timing is detected, relatively time-consuming and cumbersome.Early warning mechanism imperfection, when there are emergency situations, staff cannot be quick
Find fault section and abnormal conditions, and process the failure of electrical network, electrical network is powered can not timely be recovered.
The problem of overhead transmission line fault ground point cannot be accurately positioned for above-mentioned prior art, be not yet proposed at present effective
Solution.
The content of the invention
A kind of method of fault location, apparatus and system are embodiments provided, at least to solve existing skill
Art cannot be accurately positioned the technical problem of overhead transmission line fault ground point.
A kind of one side according to embodiments of the present invention, there is provided method of fault location, including：Obtain any
The current value of the zero-sequence current between two indicators；The current value of zero-sequence current is big relatively between any two indicator
It is little, obtain the first comparative result；According to two big indicators of the current value of the first comparative result acquisition zero-sequence current；If connect
Place is located between two big indicators of the current value of zero-sequence current, determines that earth point is fault ground point.
Further, after the current value for obtaining the zero-sequence current between any two indicator, method also includes：Point
Do not compare the size of capacitance current value between the current value of zero-sequence current and any two indicator between any two indicator,
Obtain the second comparative result；It is less than or equal to appoint in the current value that the second comparative result is zero-sequence current between any two indicator
Between two indicators of meaning in the case of capacitance current value, determine and do not exist between any two indicator fault ground point；
Second comparative result is the current value of zero-sequence current between any two indicator more than electric capacity electricity between any two indicator
In the case of flow valuve, into perform compare the size of the current value of zero-sequence current between any two indicator the step of.
Further, according to two indicators that the current value of the first comparative result acquisition zero-sequence current is big, including：Judge
Whether the first comparative result compares threshold value beyond default；The first comparative result beyond it is default compare threshold value in the case of,
Obtain two big indicators of the current value of zero-sequence current.
Further, the current value between two big indicators of the current value of zero-sequence current is 100A to 1000A.
Another aspect according to embodiments of the present invention, additionally provides a kind of device of fault location, including：First obtains
Delivery block, for obtaining the current value of the zero-sequence current between any two indicator；First comparison module, for relatively more any
The size of the current value of zero-sequence current, obtains the first comparative result between two indicators；Second acquisition module, for according to
One comparative result obtains big two indicators of current value of zero-sequence current；First determining module, if be located at for earth point
Between two big indicators of the current value of zero-sequence current, determine that earth point is fault ground point.
Further, device also includes：Second comparison module, for being respectively compared zero sequence electricity between any two indicator
The size of capacitance current value, obtains the second comparative result between the current value and any two indicator of stream；Second determining module,
For being less than or equal to any two indicator in the current value that the second comparative result is zero-sequence current between any two indicator
Between in the case of capacitance current value, determine and do not exist between any two indicator fault ground point；Performing module, for
Second comparative result is the current value of zero-sequence current between any two indicator more than electric capacity electricity between any two indicator
In the case of flow valuve, the first comparison module is run.
Further, the second acquisition module, including：Judging submodule, for judging the first comparative result whether beyond pre-
If comparison threshold value；Acquisition submodule, for the first comparative result beyond it is default compare threshold value in the case of, obtain zero sequence
Two big indicators of the current value of electric current.
Further, the current value between two big indicators of the current value of zero-sequence current is 100A to 1000A.
Another aspect according to embodiments of the present invention, additionally provides a kind of system of fault location, including：At least three
Individual indicator, for obtaining the current value of the zero-sequence current between any two indicator；Processor, with least three indicators
Association, for comparing the size of the current value of zero-sequence current between any two indicator, obtains the first comparative result；Process
Device, is additionally operable to according to two big indicators of the current value of the first comparative result acquisition zero-sequence current；At least three indicators, also
If be located between two big indicators of the current value of zero-sequence current for earth point, determine that earth point is fault ground point.
Further, system also includes：Adapter, is connected with least three indicators, indicates for sending at least three
The failure indication information of device.
In embodiments of the present invention, by the way of current detecting, by obtaining the zero sequence between any two indicator
The current value of electric current；The size of the current value of zero-sequence current, obtains the first comparative result relatively between any two indicator；Root
According to two big indicators of the current value of the first comparative result acquisition zero-sequence current；If earth point is located at the electric current of zero-sequence current
Between two big indicators of value, determine that earth point is fault ground point, reached the purpose of quick failure judgement earth point, from
And realize timely fast recovery of power supply, it is ensured that the technique effect of power supply reliability, so solve prior art cannot be accurate
The technical problem of positioning overhead transmission line fault ground point.
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
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 method flow diagram of fault location according to embodiments of the present invention；
Fig. 2 is the method flow diagram of a kind of optional fault location according to embodiments of the present invention；
Fig. 3 is the method flow diagram of a kind of optional fault location according to embodiments of the present invention；
Fig. 4 is the schematic diagram of a kind of optional positioning overhead transmission line abort situation according to embodiments of the present invention；
Fig. 5 is a kind of schematic device of fault location according to embodiments of the present invention；And
Fig. 6 is a kind of system schematic of fault location according to embodiments 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 the embodiment of whole.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 description and claims of this specification and the term " first " in above-mentioned accompanying drawing, "
Two " it is etc. the object for distinguishing similar, 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 here 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, and for example, process, method, system, product or the equipment for containing series of steps or unit is not necessarily limited to
Those steps clearly listed or unit, but may include clearly not list or for these processes, method, product
Or intrinsic other steps of equipment or unit.
Embodiment 1
According to embodiments of the present invention, there is provided a kind of embodiment of the method for fault location, it should be noted that attached
The step of flow process of figure is illustrated can perform in the such as computer system of one group of computer executable instructions, though also,
Logical order is so shown in flow charts, but in some cases, can be performed with the order being different from herein shown
Or the step of description.
Fig. 1 is a kind of method flow diagram of fault location according to embodiments of the present invention, as shown in figure 1, the method
Comprise the steps：
Step S102, obtains the current value of the zero-sequence current between any two indicator.
Specifically, in above-mentioned steps S102, can may faulty generation overhead transmission line earth point arrange to
Few three indicators, for example, fault detector, by the current value for obtaining the zero-sequence current between any two indicator, by
In small resistance grounding system in the case where there is singlephase earth fault, the current value of zero-sequence current is larger, generally in 100A-
Between 1000A, as long as therefore can accurately measure zero-sequence current, it is possible to judge whether single-phase earthing exactly therefore
Barrier.
In a kind of optional embodiment, Fig. 4 is the optional positioning overhead transmission line event of one kind according to embodiments of the present invention
The schematic diagram of barrier position, as shown in figure 4, P1, P2, P3 are fault detector, L is circuit, and M is earth point, and S is power switch,
Earth point is between P2 indicators and P3 indicators, if detecting the circuit zero-sequence current through P1 indicators and P2 indicators
Than larger, and through the zero-sequence current very little of P3 indicator circuits.By the size or indicator for displaying number that judge zero-sequence current
The change of value just can exactly judge whether ground connection.
Step S104, compares the size of the current value of zero-sequence current between any two indicator, obtains first and compares knot
Really.
Specifically, in above-mentioned steps S104, in the current value for getting the zero-sequence current between any two indicator
Afterwards, the first comparative result can be obtained by comparing the size of the current value of zero-sequence current between any two indicator.
Still above-mentioned steps S104 are illustrated with above-mentioned optional embodiment, as shown in figure 4, P1, P2, P3 are failure
Indicator, L is circuit, and M is earth point, and earth point is between P2 indicators and P3 indicators, if detect indicated through P1
The circuit zero-sequence current of device and P2 indicators than larger, and through the zero-sequence current very little of P3 indicator circuits.By comparing P1
The circuit zero-sequence current of indicator and P2 indicators and P2 indicators and the size of the circuit zero-sequence current of P3 indicators, obtain the
One comparative result.
Step S106, according to two big indicators of the current value of the first comparative result acquisition zero-sequence current.
Specifically, in above-mentioned steps S106, after the first comparative result is got, knot can be compared according to first
Really, big two indicators of current value of zero-sequence current are therefrom obtained, between two big indicators of the current value of zero-sequence current
There may be fault ground point.
In a kind of optional embodiment, as shown in figure 4, earth point is between P2 indicators and P3 indicators, if
Circuit zero-sequence current through P1 indicators and P2 indicators is detected than larger, and through the zero-sequence current of P3 indicator circuits
Very little.By comparing the circuit zero-sequence current of P1 indicators and P2 indicators and the circuit zero sequence electricity of P2 indicators and P3 indicators
The size of stream, can enter according to two big indicators of the current value for comparing the first comparative result acquisition zero-sequence current for drawing
And judge whether fault ground point.
Step S108, if earth point is located between two big indicators of the current value of zero-sequence current, determines earth point
For fault ground point.
Specifically, in above-mentioned steps S108, according to the electricity for comparing the first comparative result acquisition zero-sequence current for drawing
After two big indicators of flow valuve, it is understood that there may be in overhead transmission line between two big indicators of the current value of zero-sequence current not
There is the situation of earth point, in the case where earth point is located between two big indicators of the current value of zero-sequence current, it is determined that
Earth point between two big indicators of the current value of zero-sequence current is fault ground point.
In the above-described embodiments, by measuring the size of the current value of zero-sequence current, and then accurately judge whether
Singlephase earth fault, reduces and searches fault time, is easy to fast recovery of power supply.
For above-mentioned indicator (for example, fault detector), herein it should be noted that indicator can be closed with adapter
Connection, breaks down alarm in overhead transmission line, makes operation maintenance personnel find that circuit breaks down or abnormal conditions rapidly, so as to fast
Check be out of order section and abnormal conditions, timely handling failure quickly.
In above-mentioned steps S102 to step S108, the embodiment of the present application is appointed by the way of current detecting by obtaining
The current value of the zero-sequence current between two indicators of meaning；The current value of zero-sequence current is big relatively between any two indicator
It is little, obtain the first comparative result；According to two big indicators of the current value of the first comparative result acquisition zero-sequence current；If connect
Place is located between two big indicators of the current value of zero-sequence current, determines that earth point is fault ground point, has been reached quick
The purpose of failure judgement earth point, it is achieved thereby that fast recovery of power supply in time, it is ensured that the technique effect of power supply reliability, and then
Solving prior art cannot be accurately positioned the technical problem of overhead transmission line fault ground point.
Based on the technical scheme that above-described embodiment is provided, present invention also offers following preferred version：
Optionally, Fig. 2 is the method flow diagram of a kind of optional fault location according to embodiments of the present invention, is such as schemed
Shown in 2, after execution step S102, i.e., after the current value for obtaining the zero-sequence current between any two indicator, should
Method also comprises the steps：
Step S202, be respectively compared between any two indicator the current value of zero-sequence current and any two indicator it
Between capacitance current value size, obtain the second comparative result.
In above-mentioned steps S202, because small resistance grounding system is when occurring singlephase earth fault, zero-sequence current is larger,
Generally between 100A-1000A, much larger than capacitance current, therefore, obtaining the zero-sequence current between any two indicator
After current value, can further be respectively compared the current value of zero-sequence current between any two indicator and indicate with any two
The size of capacitance current value is judging whether detected overhead transmission line breaks down between device.
Step S204, is less than or equal to appoint in the current value that the second comparative result is zero-sequence current between any two indicator
Between two indicators of meaning in the case of capacitance current value, determine and do not exist between any two indicator fault ground point.
Specifically, in above-mentioned steps S204, comparative result be the second comparative result be any two indicator between
In the case that the current value of zero-sequence current is less than or equal to capacitance current value between any two indicator, determine that any two is indicated
There is no fault ground point between device.
Step S206, in the current value that the second comparative result is zero-sequence current between any two indicator any two are more than
Between individual indicator in the case of capacitance current value, into execution the current value of zero-sequence current between any two indicator is compared
Size the step of.
Specifically, in above-mentioned steps S206, comparative result be the second comparative result be any two indicator between
In the case that the current value of zero-sequence current is more than capacitance current value between any two indicator, determine any two indicator it
Between there may be fault ground point, can enter execution step S104, that is, compare zero-sequence current between any two indicator
The step of size of current value.
Optionally, Fig. 3 is the method flow diagram of a kind of optional fault location according to embodiments of the present invention, is such as schemed
Shown in 3, in execution step S106, i.e., according to two indicators that the current value of the first comparative result acquisition zero-sequence current is big
When, the method comprises the steps：
Step S302, judges whether the first comparative result compares threshold value beyond default.
Step S304, the first comparative result beyond it is default compare threshold value in the case of, obtain zero-sequence current electric current
Two big indicators of value.
Current value in above-mentioned steps S302 to step S304, between two big indicators of the current value of zero-sequence current
May differ by less, be not reaching to situation about breaking down, can be by determining whether the first comparative result whether beyond pre-
If comparison threshold value, the first comparative result beyond it is default compare threshold value in the case of, then the current value for obtaining zero-sequence current
Two big indicators.
Optionally, the current value between two big indicators of the current value of zero-sequence current is 100A to 1000A.
As a kind of optional embodiment, in the case where overhead transmission line occurs singlephase earth fault, the electricity of zero-sequence current
Flow valuve is larger, generally between 100A-1000A, much larger than the current value of capacitance current, therefore by accurately measuring zero sequence electricity
The size of the current value of stream, can accurately judge whether to there occurs singlephase earth fault, reduce the time for searching failure, be easy to fast
Quick-recovery is powered.
Embodiment 2
Another aspect according to embodiments of the present invention, additionally provides a kind of device of fault location, above-described embodiment 1
The method and step for being provided can be realized in the device that the present embodiment is provided.
Fig. 5 is a kind of schematic device of fault location according to embodiments of the present invention, as shown in figure 5, the device
Including：First acquisition module 10, the first comparison module 12, the second acquisition module 14, the first determining module 16, wherein,
First acquisition module 10, for obtaining the current value of the zero-sequence current between any two indicator；First compares
Module 12, for comparing the size of the current value of zero-sequence current between any two indicator, obtains the first comparative result；Second
Acquisition module 14, two big indicators of the current value for obtaining zero-sequence current according to the first comparative result；First determines mould
Block 16, if be located between two big indicators of the current value of zero-sequence current for earth point, determines that earth point connects for failure
Place.
Specifically, at least three indicators can be set in the earth point of the overhead transmission line of possible faulty generation, for example,
Fault detector, above-mentioned first acquisition module 10, by obtain any two indicator between zero-sequence current current value, by
In small resistance grounding system in the case where there is singlephase earth fault, the current value of zero-sequence current is larger, generally in 100A-
Between 1000A, as long as therefore can accurately measure zero-sequence current, it is possible to judge whether single-phase earthing exactly therefore
Barrier.
In a kind of optional embodiment, Fig. 4 is the optional positioning overhead transmission line event of one kind according to embodiments of the present invention
The schematic diagram of barrier position, as shown in figure 4, P1, P2, P3 are fault detector, L is circuit, and M is earth point, and earth point refers in P2
Show between device and P3 indicators, if detecting circuit zero-sequence current through P1 indicators and P2 indicators than larger, and Jing
Cross the zero-sequence current very little of P3 indicator circuits.By judge zero-sequence current size or indicator for displaying numerical value change with regard to energy
Judge whether ground connection exactly.
Specifically, above-mentioned first comparison module 12, in the electric current for getting the zero-sequence current between any two indicator
After value, the first comparative result can be obtained by comparing the size of the current value of zero-sequence current between any two indicator.
Still embodiment is illustrated with above-mentioned optional embodiment, as shown in figure 4, P1, P2, P3 are indicating fault
Device, L is circuit, and M is earth point, earth point between P2 indicators and P3 indicators, if detect through P1 indicators and
The circuit zero-sequence current of P2 indicators than larger, and through the zero-sequence current very little of P3 indicator circuits.Indicated by comparing P1
The circuit zero-sequence current of device and P2 indicators and P2 indicators and the size of the circuit zero-sequence current of P3 indicators, obtain the first ratio
Relatively result.
Specifically, above-mentioned second acquisition module 14, after the first comparative result is got, can compare knot according to first
Really, big two indicators of current value of zero-sequence current are therefrom obtained, between two big indicators of the current value of zero-sequence current
There may be fault ground point.
In a kind of optional embodiment, as shown in figure 4, earth point is between P2 indicators and P3 indicators, if
Circuit zero-sequence current through P1 indicators and P2 indicators is detected than larger, and through the zero-sequence current of P3 indicator circuits
Very little.By comparing the circuit zero-sequence current of P1 indicators and P2 indicators and the circuit zero sequence electricity of P2 indicators and P3 indicators
The size of stream, can enter according to two big indicators of the current value for comparing the first comparative result acquisition zero-sequence current for drawing
And judge whether fault ground point.
Specifically, above-mentioned first determining module 16, is obtaining zero-sequence current according to comparing the first comparative result for drawing
After two big indicators of current value, it is understood that there may be in overhead transmission line between two big indicators of the current value of zero-sequence current
There is no the situation of earth point, in the case where earth point is located between two big indicators of the current value of zero-sequence current, really
The earth point being positioned between two big indicators of the current value of zero-sequence current is fault ground point.
In the above-described embodiments, by measuring the size of the current value of zero-sequence current, and then accurately judge whether
Singlephase earth fault, reduces and searches fault time, is easy to fast recovery of power supply.
For above-mentioned indicator (for example, fault detector), herein it should be noted that indicator can be closed with adapter
Connection, breaks down alarm in overhead transmission line, makes operation maintenance personnel find that circuit breaks down or abnormal conditions rapidly, so as to fast
Check be out of order section and abnormal conditions, timely handling failure quickly.
Herein it should be noted that above-mentioned first acquisition module 10, the first comparison module 12, the second acquisition module 14,
One determining module 16 corresponding to step S102 in embodiment one to step S108, with corresponding step realized by above-mentioned module
Example is identical with application scenarios, but is not limited to the disclosure of that of above-described embodiment one.It should be noted that above-mentioned module conduct
The a part of of device can perform in the such as computer system of one group of computer executable instructions.
In the above embodiments of the present application, by the way of current detecting, by the first acquisition module, for obtaining arbitrarily
The current value of the zero-sequence current between two indicators；First comparison module, for comparing zero sequence between any two indicator
The size of the current value of electric current, obtains the first comparative result；Second acquisition module, for obtaining zero sequence according to the first comparative result
Two big indicators of the current value of electric current；First determining module, if big positioned at the current value of zero-sequence current for earth point
Two indicators between, determine that earth point for fault ground point, has reached the purpose of quick failure judgement earth point, so as to reality
Having showed timely fast recovery of power supply, it is ensured that the technique effect of power supply reliability, and then solved prior art to be accurately positioned
The technical problem of overhead transmission line fault ground point.
Based on the technical scheme that above-described embodiment is provided, present invention also offers following preferred version：
Optionally, device also includes：Second comparison module 20, the second determining module 22, performing module 24, wherein, second
Comparison module 20, for being respectively compared between any two indicator between the current value of zero-sequence current and any two indicator
The size of capacitance current value, obtains the second comparative result；Second determining module 22, for the second comparative result be any two
In the case that the current value of zero-sequence current is less than or equal to capacitance current value between any two indicator between indicator, it is determined that appointing
There is no fault ground point between two indicators of meaning；Performing module 24, for the second comparative result be any two indicate
In the case that the current value of zero-sequence current is more than capacitance current value between any two indicator between device, mould is compared in operation first
Block.
In above-mentioned optional embodiment, because when there is singlephase earth fault in small resistance grounding system, zero-sequence current
It is larger, generally between 100A-1000A, much larger than capacitance current, therefore, obtaining the zero sequence between any two indicator
After the current value of electric current, the second comparison module 20 can further be respectively compared zero-sequence current between any two indicator
Between current value and any two indicator the size of capacitance current value come judge detected overhead transmission line whether occur therefore
Barrier.
Specifically, above-mentioned second determining module 22, comparative result be the second comparative result be any two indicator it
Between zero-sequence current current value less than or equal to capacitance current value between any two indicator in the case of, determine that any two refers to
Show and do not exist between device fault ground point.
Specifically, above-mentioned performing module 24, is that the second comparative result is between any two indicator zero in comparative result
In the case that the current value of sequence electric current is more than capacitance current value between any two indicator, determine between any two indicator
Fault ground point is there may be, the first comparison module is run.
Herein it should be noted that above-mentioned second comparison module 20, the second determining module 22, performing module 24 are corresponding to real
Step S202 in example one is applied to step S206, above-mentioned module is identical with example and application scenarios that the step of correspondence is realized,
But it is not limited to the disclosure of that of above-described embodiment one.It should be noted that above-mentioned module can be as a part of of device
Perform in the such as computer system of one group of computer executable instructions.
Optionally, the second acquisition module 14, including：Judging submodule 141, acquisition submodule 143, wherein, judge submodule
Block 141, for judging that whether the first comparative result compares threshold value beyond default；Acquisition submodule 143, for comparing first
As a result beyond it is default compare threshold value in the case of, obtain big two indicators of current value of zero-sequence current.
In the scheme that above-mentioned optional embodiment is provided, between two big indicators of the current value of zero-sequence current
Current value may differ by less, be not reaching to situation about breaking down, and judging submodule 141 can be by determining whether first
Whether comparative result compares threshold value beyond default, the first comparative result beyond it is default compare threshold value in the case of, obtain
Submodule 143 obtains again big two indicators of current value of zero-sequence current.
Herein it should be noted that above-mentioned judging submodule 141, acquisition submodule 143 are corresponding to the step in embodiment one
, to step S304, above-mentioned module is identical with example and application scenarios that the step of correspondence is realized, but is not limited to above-mentioned for rapid S302
The disclosure of that of embodiment one.It should be noted that above-mentioned module can be in such as one group calculating as a part of of device
Perform in the computer system of machine executable instruction.
Optionally, the current value between two big indicators of the current value of zero-sequence current is 100A to 1000A.
As a kind of optional embodiment, in the case where overhead transmission line occurs singlephase earth fault, the electricity of zero-sequence current
Flow valuve is larger, generally between 100A-1000A, much larger than the current value of capacitance current, therefore by accurately measuring zero sequence electricity
The size of the current value of stream, can accurately judge whether to there occurs singlephase earth fault, reduce the time for searching failure, be easy to fast
Quick-recovery is powered.
Embodiment 3
Another aspect according to embodiments of the present invention, additionally provides a kind of system of fault location, above-described embodiment 2
The device for being provided can run in the system that the present embodiment is provided.
Fig. 6 is a kind of system schematic of fault location according to embodiments of the present invention, as shown in fig. 6, the system
Including：
At least three indicators 40, for obtaining the current value of the zero-sequence current between any two indicator；Processor
42, associate with least three indicators, for comparing the size of the current value of zero-sequence current between any two indicator, obtain
First comparative result；Processor 42, is additionally operable to according to two big instructions of the current value of the first comparative result acquisition zero-sequence current
Device；At least three indicators 40, if being additionally operable to earth point between two big indicators of the current value of zero-sequence current, really
Earth point is determined for fault ground point.
Specifically, at least three indicators can be set in the earth point of the overhead transmission line of possible faulty generation, for example,
Fault detector, above-mentioned at least three indicator 40, by the current value for obtaining the zero-sequence current between any two indicator,
Because small resistance grounding system is in the case where occurring singlephase earth fault, the current value of zero-sequence current is larger, generally in 100A-
Between 1000A, as long as therefore can accurately measure zero-sequence current, it is possible to judge whether single-phase earthing exactly therefore
Barrier.
In a kind of optional embodiment, Fig. 4 is the optional positioning overhead transmission line event of one kind according to embodiments of the present invention
The schematic diagram of barrier position, as shown in figure 4, P1, P2, P3 are fault detector, L is circuit, and M is earth point, and earth point refers in P2
Show between device and P3 indicators, if detecting circuit zero-sequence current through P1 indicators and P2 indicators than larger, and Jing
Cross the zero-sequence current very little of P3 indicator circuits.By judge zero-sequence current size or indicator for displaying numerical value change with regard to energy
Judge whether ground connection exactly.
Specifically, above-mentioned processor 42, after the current value for getting the zero-sequence current between any two indicator,
The first comparative result can be obtained by comparing the size of the current value of zero-sequence current between any two indicator.
Still embodiment is illustrated with above-mentioned optional embodiment, as shown in figure 4, P1, P2, P3 are indicating fault
Device, L is circuit, and M is earth point, earth point between P2 indicators and P3 indicators, if detect through P1 indicators and
The circuit zero-sequence current of P2 indicators than larger, and through the zero-sequence current very little of P3 indicator circuits.Indicated by comparing P1
The circuit zero-sequence current of device and P2 indicators and P2 indicators and the size of the circuit zero-sequence current of P3 indicators, obtain the first ratio
Relatively result.
Specifically, above-mentioned processor 42, after the first comparative result is got, can according to the first comparative result, from
Middle big two indicators of current value for obtaining zero-sequence current, may deposit between two big indicators of the current value of zero-sequence current
In fault ground point.
In a kind of optional embodiment, as shown in figure 4, earth point is between P2 indicators and P3 indicators, if
Circuit zero-sequence current through P1 indicators and P2 indicators is detected than larger, and through the zero-sequence current of P3 indicator circuits
Very little.By comparing the circuit zero-sequence current of P1 indicators and P2 indicators and the circuit zero sequence electricity of P2 indicators and P3 indicators
The size of stream, can enter according to two big indicators of the current value for comparing the first comparative result acquisition zero-sequence current for drawing
And judge whether fault ground point.
Specifically, above-mentioned at least three indicator 40, is obtaining zero-sequence current according to comparing the first comparative result for drawing
Big two indicators of current value after, it is understood that there may be in overhead transmission line two big indicators of the current value of zero-sequence current it
Between there is no the situation of earth point, in the case where earth point is located between two big indicators of the current value of zero-sequence current,
It is determined that the earth point between two big indicators of the current value of zero-sequence current is fault ground point.
In the above-described embodiments, by measuring the size of the current value of zero-sequence current, and then accurately judge whether
Singlephase earth fault, reduces and searches fault time, is easy to fast recovery of power supply.
Based on the technical scheme that above-described embodiment is provided, present invention also offers following preferred version：
Optionally, system also includes：Adapter 44, is connected with least three indicators, indicates for sending at least three
The failure indication information of device.
Specifically, said system can also include the adapter being connected with least three indicators, can be used for sending extremely
The failure indication information of few three indicators.
Used as a kind of optional embodiment, above-mentioned indicator (for example, fault detector) indicator can be with adapter
Association, breaks down alarm in overhead transmission line, makes operation maintenance personnel find that circuit breaks down or abnormal conditions rapidly, so as to
Quickly find fault section and abnormal conditions, timely handling failure.
The embodiments of the present invention are for illustration only, do not represent the quality of embodiment.
In the above embodiment of the present invention, the description to each embodiment all emphasizes particularly on different fields, and does not have in certain embodiment
The part of detailed description, may refer to the associated description of other embodiment.
In several embodiments provided herein, it should be understood that disclosed technology contents, can pass through other
Mode is realized.Wherein, device embodiment described above is only schematic, such as the division of described unit, Ke Yiwei
A kind of division of logic function, can there is an other dividing mode when actually realizing, such as multiple units or component can with reference to or
Person is desirably integrated into another system, or some features can be ignored, or does not perform.Another, shown or discussed is mutual
Between coupling or direct-coupling or communication connection can be INDIRECT COUPLING or communication link by some interfaces, unit or module
Connect, can be electrical or other forms.
The unit as separating component explanation can be or may not be it is physically separate, it is aobvious as unit
The part for showing can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
On unit.Some or all of unit therein can according to the actual needs be selected to realize the purpose of this embodiment scheme.
In addition, each functional unit in each embodiment of the invention can be integrated in a processing unit, it is also possible to
It is that unit is individually physically present, it is also possible to which two or more units are integrated in a unit.Above-mentioned integrated list
Unit both can be realized in the form of hardware, it would however also be possible to employ the form of SFU software functional unit is realized.
If the integrated unit is realized using in the form of SFU software functional unit and as independent production marketing or used
When, during a computer read/write memory medium can be stored in.Based on such understanding, technical scheme is substantially
The part for contributing to prior art in other words or all or part of the technical scheme can be in the form of software products
Embody, the computer software product is stored in a storage medium, including some instructions are used so that a computer
Equipment (can be personal computer, server or network equipment etc.) perform the whole of each embodiment methods described of the invention or
Part steps.And aforesaid storage medium includes：USB flash disk, read-only storage (ROM, Read-Only Memory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), portable hard drive, magnetic disc or CD etc. are various can be with store program codes
Medium.
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 method of fault location, it is characterised in that include：
Obtain the current value of the zero-sequence current between any two indicator；
The size of the current value of zero-sequence current, obtains the first comparative result between the comparison any two indicator；
According to two big indicators of the current value of first comparative result acquisition zero-sequence current；
If earth point is located between two big indicators of the current value of the zero-sequence current, determine that the earth point is failure
Earth point.
2. method according to claim 1, it is characterised in that obtaining the zero-sequence current between any two indicator
After current value, methods described also includes：
Electricity between the current value of zero-sequence current and any two indicator is respectively compared between any two indicator
The size of capacitance current value, obtains the second comparative result；
Described is less than or equal in the current value that second comparative result is zero-sequence current between any two indicator
Between two indicators of meaning in the case of capacitance current value, determine that there is no the failure between any two indicator connects
Place；
It is more than described any two in the current value that second comparative result is zero-sequence current between any two indicator
Between individual indicator in the case of capacitance current value, into zero-sequence current between the execution comparison any two indicator
Current value size the step of.
3. method according to claim 1, it is characterised in that the electricity of zero-sequence current is obtained according to first comparative result
Two big indicators of flow valuve, including：
Judge whether first comparative result compares threshold value beyond default；
First comparative result beyond it is described it is default compare threshold value in the case of, obtain the current value of the zero-sequence current
Two big indicators.
4. method according to claim 1, it is characterised in that two big indicators of the current value of the zero-sequence current it
Between current value be 100A to 1000A.
5. a kind of device of fault location, it is characterised in that include：
First acquisition module, for obtaining the current value of the zero-sequence current between any two indicator；
First comparison module, for the size of the current value of zero-sequence current between relatively more described any two indicator, obtains the
One comparative result；
Second acquisition module, two big indicators of the current value for obtaining zero-sequence current according to first comparative result；
First determining module, if be located between two big indicators of the current value of the zero-sequence current, really for earth point
The fixed earth point is fault ground point.
6. device according to claim 5, it is characterised in that described device also includes：
Second comparison module, it is any with described for being respectively compared the current value of zero-sequence current between any two indicator
The size of capacitance current value, obtains the second comparative result between two indicators；
Second determining module, in the electric current that second comparative result is zero-sequence current between any two indicator
In the case that value is less than or equal to capacitance current value between any two indicator, determines and do not deposited between any two indicator
In the fault ground point；
Performing module, for big in the current value that second comparative result is zero-sequence current between any two indicator
Between any two indicator in the case of capacitance current value, first comparison module is run.
7. device according to claim 6, it is characterised in that second acquisition module, including：
Judging submodule, for judging that whether first comparative result compares threshold value beyond default；
Acquisition submodule, for first comparative result beyond it is described it is default compare threshold value in the case of, obtain described
Two big indicators of the current value of zero-sequence current.
8. device according to claim 5, it is characterised in that two big indicators of the current value of the zero-sequence current it
Between current value be 100A to 1000A.
9. a kind of system of fault location, it is characterised in that include：
At least three indicators, for obtaining the current value of the zero-sequence current between any two indicator；
Processor, associates with least three indicator, for zero-sequence current between relatively more described any two indicator
The size of current value, obtains the first comparative result；
The processor, is additionally operable to according to two big indicators of the current value of first comparative result acquisition zero-sequence current；
At least three indicator, if being additionally operable to earth point positioned at two big indicators of the current value of the zero-sequence current
Between, determine that the earth point is fault ground point.
10. system according to claim 9, it is characterised in that the system also includes：
Adapter, is connected with least three indicator, for sending the failure indication information of at least three indicator.
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| CN201611132741.0A CN106646126A (en) | 2016-12-09 | 2016-12-09 | Method, device and system for locating fault |
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| CN201611132741.0A CN106646126A (en) | 2016-12-09 | 2016-12-09 | Method, device and system for locating fault |
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| CN109919217A (en) * | 2019-02-28 | 2019-06-21 | 深圳智链物联科技有限公司 | Charging behavior recognition methods, device, terminal device and storage medium |
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